[PATCH 00/32] OMAPDSS: dss-dev-model "base" (Part 1/2)

[PATCH 00/32] OMAPDSS: dss-dev-model "base" (Part 1/2)

[Tomi Valkeinen]

Hi,

Here's are the first sets of patches targeting towards enabling DT for DSS and
changing the DSS device model to be more versatile. The exact division of the
sets of patches is still a bit open, and some splitting up for arch/driver
changes is needed, but most likely there will be at least the following major
sets, each based on the former one:

- base, containing cleanups and changes that do not yet really bring bigger new
  features
- dev-model, implements the new DSS device model, including new panel drivers
- dt, adds DSS DT support (not at all ready yet, although works for a few boards)

The patches can be found from the following branches:

git://gitorious.org/linux-omap-dss2/linux.git work/dss-dev-model-base
git://gitorious.org/linux-omap-dss2/linux.git work/dss-dev-model
git://gitorious.org/linux-omap-dss2/linux.git work/dss-dev-model-dt

The set you are looking at is the "base" set.

The "base" set shouldn't change anything from the user's point of view. It
contains patches that do not make much sense until "dev-model" and "dt" are
merged, but those patches should not cause any problems either. Most likely the
"base" set is quite stable, I don't expect any changes to it.

 Tomi


Tomi Valkeinen (32):
  OMAPDSS: add pdata->default_display_name
  OMAPDSS: only probe pdata if there's one
  OMAPDSS: add omap_dss_find_output()
  OMAPDSS: add omap_dss_find_output_by_node()
  OMAPDSS: fix dss_get_ctx_loss_count for DT
  OMAPDSS: DPI: fix regulators for DT
  OMAPDSS: SDI: fix regulators for DT
  OMAPDSS: clean up dss_[ovl|mgr]_get_device()
  OMAPDSS: add helpers to get mgr or output from display
  OMAPDSS: split overlay manager creation
  OMAPDRM: fix overlay manager handling
  OMAPDSS: Implement display (dis)connect support
  OMAPDSS: CORE: use devm_regulator_get
  OMAPDSS: DSI: cleanup regulator init
  OMAPDSS: DPI: cleanup pll & regulator init
  OMAPDSS: HDMI: add hdmi_init_regulator
  OMAPDSS: SDI: clean up regulator init
  OMAPDSS: VENC: clean up regulator init
  OMAPDSS: add videomode conversion support
  OMAPDSS: remove dssdev uses in trivial cases
  OMAPDSS: add panel list
  OMAPDSS: use the panel list in omap_dss_get_next_device
  OMAPDSS: don't use dss bus in suspend/resume
  OMAPDSS: implement display sysfs without dss bus
  OMAPDSS: Add panel dev pointer to dssdev
  OMAPDSS: remove omap_dss_start/stop_device()
  OMAPDSS: combine omap_dss_output into omap_dss_device
  OMAPDSS: omapdss.h: add owner field to omap_dss_device
  OMAPDSS: add module_get/put to omap_dss_get/put_device()
  OMAPDSS: add THIS_MODULE owner to DSS outputs
  OMAPDSS: output: increase refcount in find_output funcs
  OMAPFB: use EPROBE_DEFER if default display is not present

 drivers/gpu/drm/omapdrm/omap_crtc.c                |  46 +++-
 drivers/gpu/drm/omapdrm/omap_drv.c                 |  21 +-
 drivers/gpu/drm/omapdrm/omap_drv.h                 |   1 +
 drivers/video/omap2/displays/panel-acx565akm.c     |  16 +-
 drivers/video/omap2/displays/panel-generic-dpi.c   |  26 +--
 .../omap2/displays/panel-lgphilips-lb035q02.c      |  10 +-
 drivers/video/omap2/displays/panel-n8x0.c          |  30 +--
 .../omap2/displays/panel-nec-nl8048hl11-01b.c      |   4 +-
 drivers/video/omap2/displays/panel-picodlp.c       |  32 +--
 .../video/omap2/displays/panel-sharp-ls037v7dw01.c |  10 +-
 drivers/video/omap2/displays/panel-taal.c          | 164 +++++++-------
 drivers/video/omap2/displays/panel-tfp410.c        |  32 +--
 .../video/omap2/displays/panel-tpo-td043mtea1.c    |  36 +--
 drivers/video/omap2/dss/Kconfig                    |   1 +
 drivers/video/omap2/dss/apply.c                    |  47 ++--
 drivers/video/omap2/dss/core.c                     | 108 +++++----
 drivers/video/omap2/dss/dispc.c                    |   4 +
 drivers/video/omap2/dss/display-sysfs.c            | 154 +++++++------
 drivers/video/omap2/dss/display.c                  | 246 ++++++++++++++-------
 drivers/video/omap2/dss/dpi.c                      | 140 ++++++------
 drivers/video/omap2/dss/dsi.c                      | 124 ++++-------
 drivers/video/omap2/dss/dss.c                      |   3 +-
 drivers/video/omap2/dss/dss.h                      |  16 +-
 drivers/video/omap2/dss/hdmi.c                     |  87 ++++----
 drivers/video/omap2/dss/manager-sysfs.c            |  47 ++--
 drivers/video/omap2/dss/manager.c                  |  29 ++-
 drivers/video/omap2/dss/output.c                   |  78 ++++++-
 drivers/video/omap2/dss/rfbi.c                     |  39 ++--
 drivers/video/omap2/dss/sdi.c                      |  78 ++++---
 drivers/video/omap2/dss/venc.c                     |  74 +++----
 drivers/video/omap2/dss/venc_panel.c               |  16 +-
 drivers/video/omap2/omapfb/omapfb-ioctl.c          |   9 +-
 drivers/video/omap2/omapfb/omapfb-main.c           |  27 +--
 include/video/omapdss.h                            | 103 ++++++---
 34 files changed, 1088 insertions(+), 770 deletions(-)

-- 
1.8.1.2

[PATCH 00/32] OMAPDSS: dss-dev-model "base" (Part 1/2)

[Tomi Valkeinen]

Hi,

Here's are the first sets of patches targeting towards enabling DT for DSS and
changing the DSS device model to be more versatile. The exact division of the
sets of patches is still a bit open, and some splitting up for arch/driver
changes is needed, but most likely there will be at least the following major
sets, each based on the former one:

- base, containing cleanups and changes that do not yet really bring bigger new
  features
- dev-model, implements the new DSS device model, including new panel drivers
- dt, adds DSS DT support (not at all ready yet, although works for a few boards)

The patches can be found from the following branches:

git://gitorious.org/linux-omap-dss2/linux.git work/dss-dev-model-base
git://gitorious.org/linux-omap-dss2/linux.git work/dss-dev-model
git://gitorious.org/linux-omap-dss2/linux.git work/dss-dev-model-dt

The set you are looking at is the "base" set.

The "base" set shouldn't change anything from the user's point of view. It
contains patches that do not make much sense until "dev-model" and "dt" are
merged, but those patches should not cause any problems either. Most likely the
"base" set is quite stable, I don't expect any changes to it.

 Tomi


Tomi Valkeinen (32):
  OMAPDSS: add pdata->default_display_name
  OMAPDSS: only probe pdata if there's one
  OMAPDSS: add omap_dss_find_output()
  OMAPDSS: add omap_dss_find_output_by_node()
  OMAPDSS: fix dss_get_ctx_loss_count for DT
  OMAPDSS: DPI: fix regulators for DT
  OMAPDSS: SDI: fix regulators for DT
  OMAPDSS: clean up dss_[ovl|mgr]_get_device()
  OMAPDSS: add helpers to get mgr or output from display
  OMAPDSS: split overlay manager creation
  OMAPDRM: fix overlay manager handling
  OMAPDSS: Implement display (dis)connect support
  OMAPDSS: CORE: use devm_regulator_get
  OMAPDSS: DSI: cleanup regulator init
  OMAPDSS: DPI: cleanup pll & regulator init
  OMAPDSS: HDMI: add hdmi_init_regulator
  OMAPDSS: SDI: clean up regulator init
  OMAPDSS: VENC: clean up regulator init
  OMAPDSS: add videomode conversion support
  OMAPDSS: remove dssdev uses in trivial cases
  OMAPDSS: add panel list
  OMAPDSS: use the panel list in omap_dss_get_next_device
  OMAPDSS: don't use dss bus in suspend/resume
  OMAPDSS: implement display sysfs without dss bus
  OMAPDSS: Add panel dev pointer to dssdev
  OMAPDSS: remove omap_dss_start/stop_device()
  OMAPDSS: combine omap_dss_output into omap_dss_device
  OMAPDSS: omapdss.h: add owner field to omap_dss_device
  OMAPDSS: add module_get/put to omap_dss_get/put_device()
  OMAPDSS: add THIS_MODULE owner to DSS outputs
  OMAPDSS: output: increase refcount in find_output funcs
  OMAPFB: use EPROBE_DEFER if default display is not present

 drivers/gpu/drm/omapdrm/omap_crtc.c                |  46 +++-
 drivers/gpu/drm/omapdrm/omap_drv.c                 |  21 +-
 drivers/gpu/drm/omapdrm/omap_drv.h                 |   1 +
 drivers/video/omap2/displays/panel-acx565akm.c     |  16 +-
 drivers/video/omap2/displays/panel-generic-dpi.c   |  26 +--
 .../omap2/displays/panel-lgphilips-lb035q02.c      |  10 +-
 drivers/video/omap2/displays/panel-n8x0.c          |  30 +--
 .../omap2/displays/panel-nec-nl8048hl11-01b.c      |   4 +-
 drivers/video/omap2/displays/panel-picodlp.c       |  32 +--
 .../video/omap2/displays/panel-sharp-ls037v7dw01.c |  10 +-
 drivers/video/omap2/displays/panel-taal.c          | 164 +++++++-------
 drivers/video/omap2/displays/panel-tfp410.c        |  32 +--
 .../video/omap2/displays/panel-tpo-td043mtea1.c    |  36 +--
 drivers/video/omap2/dss/Kconfig                    |   1 +
 drivers/video/omap2/dss/apply.c                    |  47 ++--
 drivers/video/omap2/dss/core.c                     | 108 +++++----
 drivers/video/omap2/dss/dispc.c                    |   4 +
 drivers/video/omap2/dss/display-sysfs.c            | 154 +++++++------
 drivers/video/omap2/dss/display.c                  | 246 ++++++++++++++-------
 drivers/video/omap2/dss/dpi.c                      | 140 ++++++------
 drivers/video/omap2/dss/dsi.c                      | 124 ++++-------
 drivers/video/omap2/dss/dss.c                      |   3 +-
 drivers/video/omap2/dss/dss.h                      |  16 +-
 drivers/video/omap2/dss/hdmi.c                     |  87 ++++----
 drivers/video/omap2/dss/manager-sysfs.c            |  47 ++--
 drivers/video/omap2/dss/manager.c                  |  29 ++-
 drivers/video/omap2/dss/output.c                   |  78 ++++++-
 drivers/video/omap2/dss/rfbi.c                     |  39 ++--
 drivers/video/omap2/dss/sdi.c                      |  78 ++++---
 drivers/video/omap2/dss/venc.c                     |  74 +++----
 drivers/video/omap2/dss/venc_panel.c               |  16 +-
 drivers/video/omap2/omapfb/omapfb-ioctl.c          |   9 +-
 drivers/video/omap2/omapfb/omapfb-main.c           |  27 +--
 include/video/omapdss.h                            | 103 ++++++---
 34 files changed, 1088 insertions(+), 770 deletions(-)

-- 
1.8.1.2

[PATCH 01/32] OMAPDSS: add pdata->default_display_name

[Tomi Valkeinen]

We can currently set the default display (i.e. the initial display) in
the omapdss platform data by using a pointer to the default
omap_dss_device. Internally omapdss uses the device's name to resolve
the default display.

As it's difficult to get the omap_dss_device pointer in the future,
after we've changed the omapdss device model, this patch adds a new way
to define the default display, by using the name of the display.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Archit Taneja <archit@ti.com>
---
 drivers/video/omap2/dss/core.c | 2 ++
 include/video/omapdss.h        | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 60cc6fe..502ec1b 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -235,6 +235,8 @@ static int __init omap_dss_probe(struct platform_device *pdev)
 
 	if (def_disp_name)
 		core.default_display_name = def_disp_name;
+	else if (pdata->default_display_name)
+		core.default_display_name = pdata->default_display_name;
 	else if (pdata->default_device)
 		core.default_display_name = pdata->default_device->name;
 
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 62ca9a7..d5f1fff 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -365,6 +365,7 @@ struct omap_dss_board_info {
 	int num_devices;
 	struct omap_dss_device **devices;
 	struct omap_dss_device *default_device;
+	const char *default_display_name;
 	int (*dsi_enable_pads)(int dsi_id, unsigned lane_mask);
 	void (*dsi_disable_pads)(int dsi_id, unsigned lane_mask);
 	int (*set_min_bus_tput)(struct device *dev, unsigned long r);
-- 
1.8.1.2

[PATCH 01/32] OMAPDSS: add pdata->default_display_name

[Tomi Valkeinen]

We can currently set the default display (i.e. the initial display) in
the omapdss platform data by using a pointer to the default
omap_dss_device. Internally omapdss uses the device's name to resolve
the default display.

As it's difficult to get the omap_dss_device pointer in the future,
after we've changed the omapdss device model, this patch adds a new way
to define the default display, by using the name of the display.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Archit Taneja <archit@ti.com>
---
 drivers/video/omap2/dss/core.c | 2 ++
 include/video/omapdss.h        | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 60cc6fe..502ec1b 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -235,6 +235,8 @@ static int __init omap_dss_probe(struct platform_device *pdev)
 
 	if (def_disp_name)
 		core.default_display_name = def_disp_name;
+	else if (pdata->default_display_name)
+		core.default_display_name = pdata->default_display_name;
 	else if (pdata->default_device)
 		core.default_display_name = pdata->default_device->name;
 
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 62ca9a7..d5f1fff 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -365,6 +365,7 @@ struct omap_dss_board_info {
 	int num_devices;
 	struct omap_dss_device **devices;
 	struct omap_dss_device *default_device;
+	const char *default_display_name;
 	int (*dsi_enable_pads)(int dsi_id, unsigned lane_mask);
 	void (*dsi_disable_pads)(int dsi_id, unsigned lane_mask);
 	int (*set_min_bus_tput)(struct device *dev, unsigned long r);
-- 
1.8.1.2

[PATCH 02/32] OMAPDSS: only probe pdata if there's one

[Tomi Valkeinen]

omapdss output drivers always read the platform data. This crashes when
there's no platform data when using DT.

Add a check to read the platform data only if it exists.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dpi.c  | 12 ++++++++----
 drivers/video/omap2/dss/dsi.c  | 13 +++++++------
 drivers/video/omap2/dss/hdmi.c | 16 ++++++++++------
 drivers/video/omap2/dss/rfbi.c | 11 ++++++-----
 drivers/video/omap2/dss/sdi.c  | 12 ++++++++----
 drivers/video/omap2/dss/venc.c | 13 +++++++------
 6 files changed, 46 insertions(+), 31 deletions(-)

diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index 757b57f..ef8fca2 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -706,13 +706,17 @@ static int omap_dpi_probe(struct platform_device *pdev)
 
 	dpi_init_output(pdev);
 
-	r = dpi_probe_pdata(pdev);
-	if (r) {
-		dpi_uninit_output(pdev);
-		return r;
+	if (pdev->dev.platform_data) {
+		r = dpi_probe_pdata(pdev);
+		if (r)
+			goto err_probe;
 	}
 
 	return 0;
+
+err_probe:
+	dpi_uninit_output(pdev);
+	return r;
 }
 
 static int __exit omap_dpi_remove(struct platform_device *pdev)
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index a73dedc..bdddd0d 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -5563,12 +5563,10 @@ static int omap_dsihw_probe(struct platform_device *dsidev)
 
 	dsi_init_output(dsidev);
 
-	r = dsi_probe_pdata(dsidev);
-	if (r) {
-		dsi_runtime_put(dsidev);
-		dsi_uninit_output(dsidev);
-		pm_runtime_disable(&dsidev->dev);
-		return r;
+	if (dsidev->dev.platform_data) {
+		r = dsi_probe_pdata(dsidev);
+		if (r)
+			goto err_probe;
 	}
 
 	dsi_runtime_put(dsidev);
@@ -5586,6 +5584,9 @@ static int omap_dsihw_probe(struct platform_device *dsidev)
 #endif
 	return 0;
 
+err_probe:
+	dsi_runtime_put(dsidev);
+	dsi_uninit_output(dsidev);
 err_runtime_get:
 	pm_runtime_disable(&dsidev->dev);
 	return r;
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 17f4d55..99f4ab5 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -1098,15 +1098,19 @@ static int omapdss_hdmihw_probe(struct platform_device *pdev)
 
 	dss_debugfs_create_file("hdmi", hdmi_dump_regs);
 
-	r = hdmi_probe_pdata(pdev);
-	if (r) {
-		hdmi_panel_exit();
-		hdmi_uninit_output(pdev);
-		pm_runtime_disable(&pdev->dev);
-		return r;
+	if (pdev->dev.platform_data) {
+		r = hdmi_probe_pdata(pdev);
+		if (r)
+			goto err_probe;
 	}
 
 	return 0;
+
+err_probe:
+	hdmi_panel_exit();
+	hdmi_uninit_output(pdev);
+	pm_runtime_disable(&pdev->dev);
+	return r;
 }
 
 static int __exit hdmi_remove_child(struct device *dev, void *data)
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index 1a17dd1..1ff221e 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -1093,15 +1093,16 @@ static int omap_rfbihw_probe(struct platform_device *pdev)
 
 	rfbi_init_output(pdev);
 
-	r = rfbi_probe_pdata(pdev);
-	if (r) {
-		rfbi_uninit_output(pdev);
-		pm_runtime_disable(&pdev->dev);
-		return r;
+	if (pdev->dev.platform_data) {
+		r = rfbi_probe_pdata(pdev);
+		if (r)
+			goto err_probe;
 	}
 
 	return 0;
 
+err_probe:
+	rfbi_uninit_output(pdev);
 err_runtime_get:
 	pm_runtime_disable(&pdev->dev);
 	return r;
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 0bcd302..6277c05 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -365,13 +365,17 @@ static int omap_sdi_probe(struct platform_device *pdev)
 
 	sdi_init_output(pdev);
 
-	r = sdi_probe_pdata(pdev);
-	if (r) {
-		sdi_uninit_output(pdev);
-		return r;
+	if (pdev->dev.platform_data) {
+		r = sdi_probe_pdata(pdev);
+		if (r)
+			goto err_probe;
 	}
 
 	return 0;
+
+err_probe:
+	sdi_uninit_output(pdev);
+	return r;
 }
 
 static int __exit omap_sdi_remove(struct platform_device *pdev)
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index 74fdb3e..7b2e3ae 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -866,16 +866,17 @@ static int omap_venchw_probe(struct platform_device *pdev)
 
 	venc_init_output(pdev);
 
-	r = venc_probe_pdata(pdev);
-	if (r) {
-		venc_panel_exit();
-		venc_uninit_output(pdev);
-		pm_runtime_disable(&pdev->dev);
-		return r;
+	if (pdev->dev.platform_data) {
+		r = venc_probe_pdata(pdev);
+		if (r)
+			goto err_probe;
 	}
 
 	return 0;
 
+err_probe:
+	venc_panel_exit();
+	venc_uninit_output(pdev);
 err_panel_init:
 err_runtime_get:
 	pm_runtime_disable(&pdev->dev);
-- 
1.8.1.2

[PATCH 02/32] OMAPDSS: only probe pdata if there's one

[Tomi Valkeinen]

omapdss output drivers always read the platform data. This crashes when
there's no platform data when using DT.

Add a check to read the platform data only if it exists.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dpi.c  | 12 ++++++++----
 drivers/video/omap2/dss/dsi.c  | 13 +++++++------
 drivers/video/omap2/dss/hdmi.c | 16 ++++++++++------
 drivers/video/omap2/dss/rfbi.c | 11 ++++++-----
 drivers/video/omap2/dss/sdi.c  | 12 ++++++++----
 drivers/video/omap2/dss/venc.c | 13 +++++++------
 6 files changed, 46 insertions(+), 31 deletions(-)

diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index 757b57f..ef8fca2 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -706,13 +706,17 @@ static int omap_dpi_probe(struct platform_device *pdev)
 
 	dpi_init_output(pdev);
 
-	r = dpi_probe_pdata(pdev);
-	if (r) {
-		dpi_uninit_output(pdev);
-		return r;
+	if (pdev->dev.platform_data) {
+		r = dpi_probe_pdata(pdev);
+		if (r)
+			goto err_probe;
 	}
 
 	return 0;
+
+err_probe:
+	dpi_uninit_output(pdev);
+	return r;
 }
 
 static int __exit omap_dpi_remove(struct platform_device *pdev)
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index a73dedc..bdddd0d 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -5563,12 +5563,10 @@ static int omap_dsihw_probe(struct platform_device *dsidev)
 
 	dsi_init_output(dsidev);
 
-	r = dsi_probe_pdata(dsidev);
-	if (r) {
-		dsi_runtime_put(dsidev);
-		dsi_uninit_output(dsidev);
-		pm_runtime_disable(&dsidev->dev);
-		return r;
+	if (dsidev->dev.platform_data) {
+		r = dsi_probe_pdata(dsidev);
+		if (r)
+			goto err_probe;
 	}
 
 	dsi_runtime_put(dsidev);
@@ -5586,6 +5584,9 @@ static int omap_dsihw_probe(struct platform_device *dsidev)
 #endif
 	return 0;
 
+err_probe:
+	dsi_runtime_put(dsidev);
+	dsi_uninit_output(dsidev);
 err_runtime_get:
 	pm_runtime_disable(&dsidev->dev);
 	return r;
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 17f4d55..99f4ab5 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -1098,15 +1098,19 @@ static int omapdss_hdmihw_probe(struct platform_device *pdev)
 
 	dss_debugfs_create_file("hdmi", hdmi_dump_regs);
 
-	r = hdmi_probe_pdata(pdev);
-	if (r) {
-		hdmi_panel_exit();
-		hdmi_uninit_output(pdev);
-		pm_runtime_disable(&pdev->dev);
-		return r;
+	if (pdev->dev.platform_data) {
+		r = hdmi_probe_pdata(pdev);
+		if (r)
+			goto err_probe;
 	}
 
 	return 0;
+
+err_probe:
+	hdmi_panel_exit();
+	hdmi_uninit_output(pdev);
+	pm_runtime_disable(&pdev->dev);
+	return r;
 }
 
 static int __exit hdmi_remove_child(struct device *dev, void *data)
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index 1a17dd1..1ff221e 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -1093,15 +1093,16 @@ static int omap_rfbihw_probe(struct platform_device *pdev)
 
 	rfbi_init_output(pdev);
 
-	r = rfbi_probe_pdata(pdev);
-	if (r) {
-		rfbi_uninit_output(pdev);
-		pm_runtime_disable(&pdev->dev);
-		return r;
+	if (pdev->dev.platform_data) {
+		r = rfbi_probe_pdata(pdev);
+		if (r)
+			goto err_probe;
 	}
 
 	return 0;
 
+err_probe:
+	rfbi_uninit_output(pdev);
 err_runtime_get:
 	pm_runtime_disable(&pdev->dev);
 	return r;
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 0bcd302..6277c05 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -365,13 +365,17 @@ static int omap_sdi_probe(struct platform_device *pdev)
 
 	sdi_init_output(pdev);
 
-	r = sdi_probe_pdata(pdev);
-	if (r) {
-		sdi_uninit_output(pdev);
-		return r;
+	if (pdev->dev.platform_data) {
+		r = sdi_probe_pdata(pdev);
+		if (r)
+			goto err_probe;
 	}
 
 	return 0;
+
+err_probe:
+	sdi_uninit_output(pdev);
+	return r;
 }
 
 static int __exit omap_sdi_remove(struct platform_device *pdev)
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index 74fdb3e..7b2e3ae 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -866,16 +866,17 @@ static int omap_venchw_probe(struct platform_device *pdev)
 
 	venc_init_output(pdev);
 
-	r = venc_probe_pdata(pdev);
-	if (r) {
-		venc_panel_exit();
-		venc_uninit_output(pdev);
-		pm_runtime_disable(&pdev->dev);
-		return r;
+	if (pdev->dev.platform_data) {
+		r = venc_probe_pdata(pdev);
+		if (r)
+			goto err_probe;
 	}
 
 	return 0;
 
+err_probe:
+	venc_panel_exit();
+	venc_uninit_output(pdev);
 err_panel_init:
 err_runtime_get:
 	pm_runtime_disable(&pdev->dev);
-- 
1.8.1.2

[PATCH 03/32] OMAPDSS: add omap_dss_find_output()

[Tomi Valkeinen]

Add a support function to find a DSS output by given name. This is used
in later patches to link the panels to DSS outputs.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/output.c | 13 +++++++++++++
 include/video/omapdss.h          |  1 +
 2 files changed, 14 insertions(+)

diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index 5214df6..3274628 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -115,6 +115,19 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
 }
 EXPORT_SYMBOL(omap_dss_get_output);
 
+struct omap_dss_output *omap_dss_find_output(const char *name)
+{
+	struct omap_dss_output *out;
+
+	list_for_each_entry(out, &output_list, list) {
+		if (strcmp(out->name, name) = 0)
+			return out;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL(omap_dss_find_output);
+
 static const struct dss_mgr_ops *dss_mgr_ops;
 
 int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index d5f1fff..aad47a2 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -779,6 +779,7 @@ int omap_dss_get_num_overlays(void);
 struct omap_overlay *omap_dss_get_overlay(int num);
 
 struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id);
+struct omap_dss_output *omap_dss_find_output(const char *name);
 int omapdss_output_set_device(struct omap_dss_output *out,
 		struct omap_dss_device *dssdev);
 int omapdss_output_unset_device(struct omap_dss_output *out);
-- 
1.8.1.2

[PATCH 03/32] OMAPDSS: add omap_dss_find_output()

[Tomi Valkeinen]

Add a support function to find a DSS output by given name. This is used
in later patches to link the panels to DSS outputs.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/output.c | 13 +++++++++++++
 include/video/omapdss.h          |  1 +
 2 files changed, 14 insertions(+)

diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index 5214df6..3274628 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -115,6 +115,19 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
 }
 EXPORT_SYMBOL(omap_dss_get_output);
 
+struct omap_dss_output *omap_dss_find_output(const char *name)
+{
+	struct omap_dss_output *out;
+
+	list_for_each_entry(out, &output_list, list) {
+		if (strcmp(out->name, name) == 0)
+			return out;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL(omap_dss_find_output);
+
 static const struct dss_mgr_ops *dss_mgr_ops;
 
 int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index d5f1fff..aad47a2 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -779,6 +779,7 @@ int omap_dss_get_num_overlays(void);
 struct omap_overlay *omap_dss_get_overlay(int num);
 
 struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id);
+struct omap_dss_output *omap_dss_find_output(const char *name);
 int omapdss_output_set_device(struct omap_dss_output *out,
 		struct omap_dss_device *dssdev);
 int omapdss_output_unset_device(struct omap_dss_output *out);
-- 
1.8.1.2

[PATCH 04/32] OMAPDSS: add omap_dss_find_output_by_node()

[Tomi Valkeinen]

Add a support function to find a DSS output by given DT node. This is
used in later patches to link the panels to DSS outputs.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/output.c | 13 +++++++++++++
 include/video/omapdss.h          |  1 +
 2 files changed, 14 insertions(+)

diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index 3274628..4d01001 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -128,6 +128,19 @@ struct omap_dss_output *omap_dss_find_output(const char *name)
 }
 EXPORT_SYMBOL(omap_dss_find_output);
 
+struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node)
+{
+	struct omap_dss_output *out;
+
+	list_for_each_entry(out, &output_list, list) {
+		if (out->pdev->dev.of_node = node)
+			return out;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL(omap_dss_find_output_by_node);
+
 static const struct dss_mgr_ops *dss_mgr_ops;
 
 int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index aad47a2..7fe6144 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -780,6 +780,7 @@ struct omap_overlay *omap_dss_get_overlay(int num);
 
 struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id);
 struct omap_dss_output *omap_dss_find_output(const char *name);
+struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node);
 int omapdss_output_set_device(struct omap_dss_output *out,
 		struct omap_dss_device *dssdev);
 int omapdss_output_unset_device(struct omap_dss_output *out);
-- 
1.8.1.2

[PATCH 04/32] OMAPDSS: add omap_dss_find_output_by_node()

[Tomi Valkeinen]

Add a support function to find a DSS output by given DT node. This is
used in later patches to link the panels to DSS outputs.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/output.c | 13 +++++++++++++
 include/video/omapdss.h          |  1 +
 2 files changed, 14 insertions(+)

diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index 3274628..4d01001 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -128,6 +128,19 @@ struct omap_dss_output *omap_dss_find_output(const char *name)
 }
 EXPORT_SYMBOL(omap_dss_find_output);
 
+struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node)
+{
+	struct omap_dss_output *out;
+
+	list_for_each_entry(out, &output_list, list) {
+		if (out->pdev->dev.of_node == node)
+			return out;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL(omap_dss_find_output_by_node);
+
 static const struct dss_mgr_ops *dss_mgr_ops;
 
 int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index aad47a2..7fe6144 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -780,6 +780,7 @@ struct omap_overlay *omap_dss_get_overlay(int num);
 
 struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id);
 struct omap_dss_output *omap_dss_find_output(const char *name);
+struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node);
 int omapdss_output_set_device(struct omap_dss_output *out,
 		struct omap_dss_device *dssdev);
 int omapdss_output_unset_device(struct omap_dss_output *out);
-- 
1.8.1.2

[PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Tomi Valkeinen]

When using DT, dss device does not have platform data. However,
dss_get_ctx_loss_count() uses dss device's platform data to find the
get_ctx_loss_count function pointer.

To fix this, dss_get_ctx_loss_count() needs to be changed to get the
platform data from the omapdss device, which is a "virtual" device and
always has platform data.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dss.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
index 94f66f9..bd01608 100644
--- a/drivers/video/omap2/dss/dss.c
+++ b/drivers/video/omap2/dss/dss.c
@@ -157,7 +157,8 @@ static void dss_restore_context(void)
 
 int dss_get_ctx_loss_count(void)
 {
-	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
+	struct platform_device *core_pdev = dss_get_core_pdev();
+	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
 	int cnt;
 
 	if (!board_data->get_context_loss_count)
-- 
1.8.1.2

[PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Tomi Valkeinen]

When using DT, dss device does not have platform data. However,
dss_get_ctx_loss_count() uses dss device's platform data to find the
get_ctx_loss_count function pointer.

To fix this, dss_get_ctx_loss_count() needs to be changed to get the
platform data from the omapdss device, which is a "virtual" device and
always has platform data.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dss.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
index 94f66f9..bd01608 100644
--- a/drivers/video/omap2/dss/dss.c
+++ b/drivers/video/omap2/dss/dss.c
@@ -157,7 +157,8 @@ static void dss_restore_context(void)
 
 int dss_get_ctx_loss_count(void)
 {
-	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
+	struct platform_device *core_pdev = dss_get_core_pdev();
+	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
 	int cnt;
 
 	if (!board_data->get_context_loss_count)
-- 
1.8.1.2

[PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Tomi Valkeinen]

On some platforms DPI requires a regulator to be enabled to power up the
output pins. This regulator is, for some reason, currently attached to
the virtual omapdss device, instead of the DPI device. This does not
work for DT, as the regulator mappings need to be described in the DT
data, and the virtual omapdss device is not present there.

Fix the issue by acquiring the regulator in the DPI device. To retain
compatibility with the current board files, the old method of getting
the regulator is kept. The old method can be removed when the board
files have been changed to pass the regulator to DPI.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dpi.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index ef8fca2..43f6b26 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -37,7 +37,10 @@
 #include "dss_features.h"
 
 static struct {
+	struct platform_device *pdev;
+
 	struct regulator *vdds_dsi_reg;
+	bool vdds_dsi_from_core;
 	struct platform_device *dsidev;
 
 	struct mutex lock;
@@ -583,10 +586,15 @@ static int dpi_init_display(struct omap_dss_device *dssdev)
 		struct regulator *vdds_dsi;
 
 		vdds_dsi = dss_get_vdds_dsi();
-
 		if (IS_ERR(vdds_dsi)) {
-			DSSERR("can't get VDDS_DSI regulator\n");
-			return PTR_ERR(vdds_dsi);
+			vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
+			if (IS_ERR(vdds_dsi)) {
+				DSSERR("can't get VDDS_DSI regulator\n");
+				return PTR_ERR(vdds_dsi);
+			}
+			dpi.vdds_dsi_from_core = false;
+		} else {
+			dpi.vdds_dsi_from_core = true;
 		}
 
 		dpi.vdds_dsi_reg = vdds_dsi;
@@ -702,6 +710,8 @@ static int omap_dpi_probe(struct platform_device *pdev)
 {
 	int r;
 
+	dpi.pdev = pdev;
+
 	mutex_init(&dpi.lock);
 
 	dpi_init_output(pdev);
@@ -725,6 +735,11 @@ static int __exit omap_dpi_remove(struct platform_device *pdev)
 
 	dpi_uninit_output(pdev);
 
+	if (dpi.vdds_dsi_reg != NULL && dpi.vdds_dsi_from_core = false) {
+		regulator_put(dpi.vdds_dsi_reg);
+		dpi.vdds_dsi_reg = NULL;
+	}
+
 	return 0;
 }
 
-- 
1.8.1.2

[PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Tomi Valkeinen]

On some platforms DPI requires a regulator to be enabled to power up the
output pins. This regulator is, for some reason, currently attached to
the virtual omapdss device, instead of the DPI device. This does not
work for DT, as the regulator mappings need to be described in the DT
data, and the virtual omapdss device is not present there.

Fix the issue by acquiring the regulator in the DPI device. To retain
compatibility with the current board files, the old method of getting
the regulator is kept. The old method can be removed when the board
files have been changed to pass the regulator to DPI.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dpi.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index ef8fca2..43f6b26 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -37,7 +37,10 @@
 #include "dss_features.h"
 
 static struct {
+	struct platform_device *pdev;
+
 	struct regulator *vdds_dsi_reg;
+	bool vdds_dsi_from_core;
 	struct platform_device *dsidev;
 
 	struct mutex lock;
@@ -583,10 +586,15 @@ static int dpi_init_display(struct omap_dss_device *dssdev)
 		struct regulator *vdds_dsi;
 
 		vdds_dsi = dss_get_vdds_dsi();
-
 		if (IS_ERR(vdds_dsi)) {
-			DSSERR("can't get VDDS_DSI regulator\n");
-			return PTR_ERR(vdds_dsi);
+			vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
+			if (IS_ERR(vdds_dsi)) {
+				DSSERR("can't get VDDS_DSI regulator\n");
+				return PTR_ERR(vdds_dsi);
+			}
+			dpi.vdds_dsi_from_core = false;
+		} else {
+			dpi.vdds_dsi_from_core = true;
 		}
 
 		dpi.vdds_dsi_reg = vdds_dsi;
@@ -702,6 +710,8 @@ static int omap_dpi_probe(struct platform_device *pdev)
 {
 	int r;
 
+	dpi.pdev = pdev;
+
 	mutex_init(&dpi.lock);
 
 	dpi_init_output(pdev);
@@ -725,6 +735,11 @@ static int __exit omap_dpi_remove(struct platform_device *pdev)
 
 	dpi_uninit_output(pdev);
 
+	if (dpi.vdds_dsi_reg != NULL && dpi.vdds_dsi_from_core == false) {
+		regulator_put(dpi.vdds_dsi_reg);
+		dpi.vdds_dsi_reg = NULL;
+	}
+
 	return 0;
 }
 
-- 
1.8.1.2

[PATCH 07/32] OMAPDSS: SDI: fix regulators for DT

[Tomi Valkeinen]

SDI requires a regulator to operate. This regulator is, for some reason,
currently attached to the virtual omapdss device, instead of the SDI
device. This does not work for DT, as the regulator mappings need to be
described in the DT data, and the virtual omapdss device is not present
there.

Fix the issue by acquiring the regulator in the SDI device. To retain
compatibility with the current board files, the old method of getting
the regulator is kept. The old method can be removed when the board
files have been changed to pass the regulator to SDI.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/sdi.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 6277c05..2e3afb8 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -31,8 +31,11 @@
 #include "dss.h"
 
 static struct {
+	struct platform_device *pdev;
+
 	bool update_enabled;
 	struct regulator *vdds_sdi_reg;
+	bool vdds_sdi_from_core;
 
 	struct dss_lcd_mgr_config mgr_config;
 	struct omap_video_timings timings;
@@ -258,8 +261,14 @@ static int sdi_init_display(struct omap_dss_device *dssdev)
 		vdds_sdi = dss_get_vdds_sdi();
 
 		if (IS_ERR(vdds_sdi)) {
-			DSSERR("can't get VDDS_SDI regulator\n");
-			return PTR_ERR(vdds_sdi);
+			vdds_sdi = regulator_get(&sdi.pdev->dev, "vdds_sdi");
+			if (IS_ERR(vdds_sdi)) {
+				DSSERR("can't get VDDS_SDI regulator\n");
+				return PTR_ERR(vdds_sdi);
+			}
+			sdi.vdds_sdi_from_core = false;
+		} else {
+			sdi.vdds_sdi_from_core = true;
 		}
 
 		sdi.vdds_sdi_reg = vdds_sdi;
@@ -363,6 +372,8 @@ static int omap_sdi_probe(struct platform_device *pdev)
 {
 	int r;
 
+	sdi.pdev = pdev;
+
 	sdi_init_output(pdev);
 
 	if (pdev->dev.platform_data) {
@@ -384,6 +395,11 @@ static int __exit omap_sdi_remove(struct platform_device *pdev)
 
 	sdi_uninit_output(pdev);
 
+	if (sdi.vdds_sdi_reg != NULL && sdi.vdds_sdi_from_core = false) {
+		regulator_put(sdi.vdds_sdi_reg);
+		sdi.vdds_sdi_reg = NULL;
+	}
+
 	return 0;
 }
 
-- 
1.8.1.2

[PATCH 07/32] OMAPDSS: SDI: fix regulators for DT

[Tomi Valkeinen]

SDI requires a regulator to operate. This regulator is, for some reason,
currently attached to the virtual omapdss device, instead of the SDI
device. This does not work for DT, as the regulator mappings need to be
described in the DT data, and the virtual omapdss device is not present
there.

Fix the issue by acquiring the regulator in the SDI device. To retain
compatibility with the current board files, the old method of getting
the regulator is kept. The old method can be removed when the board
files have been changed to pass the regulator to SDI.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/sdi.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 6277c05..2e3afb8 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -31,8 +31,11 @@
 #include "dss.h"
 
 static struct {
+	struct platform_device *pdev;
+
 	bool update_enabled;
 	struct regulator *vdds_sdi_reg;
+	bool vdds_sdi_from_core;
 
 	struct dss_lcd_mgr_config mgr_config;
 	struct omap_video_timings timings;
@@ -258,8 +261,14 @@ static int sdi_init_display(struct omap_dss_device *dssdev)
 		vdds_sdi = dss_get_vdds_sdi();
 
 		if (IS_ERR(vdds_sdi)) {
-			DSSERR("can't get VDDS_SDI regulator\n");
-			return PTR_ERR(vdds_sdi);
+			vdds_sdi = regulator_get(&sdi.pdev->dev, "vdds_sdi");
+			if (IS_ERR(vdds_sdi)) {
+				DSSERR("can't get VDDS_SDI regulator\n");
+				return PTR_ERR(vdds_sdi);
+			}
+			sdi.vdds_sdi_from_core = false;
+		} else {
+			sdi.vdds_sdi_from_core = true;
 		}
 
 		sdi.vdds_sdi_reg = vdds_sdi;
@@ -363,6 +372,8 @@ static int omap_sdi_probe(struct platform_device *pdev)
 {
 	int r;
 
+	sdi.pdev = pdev;
+
 	sdi_init_output(pdev);
 
 	if (pdev->dev.platform_data) {
@@ -384,6 +395,11 @@ static int __exit omap_sdi_remove(struct platform_device *pdev)
 
 	sdi_uninit_output(pdev);
 
+	if (sdi.vdds_sdi_reg != NULL && sdi.vdds_sdi_from_core == false) {
+		regulator_put(sdi.vdds_sdi_reg);
+		sdi.vdds_sdi_reg = NULL;
+	}
+
 	return 0;
 }
 
-- 
1.8.1.2

[PATCH 08/32] OMAPDSS: clean up dss_[ovl|mgr]_get_device()

[Tomi Valkeinen]

Minor cleanup for the dss_[ovl|mgr]_get_device() functions to make them
more readable.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/apply.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index a4b356a..b84bd99 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -420,16 +420,14 @@ static void wait_pending_extra_info_updates(void)
 		DSSWARN("timeout in wait_pending_extra_info_updates\n");
 }
 
-static inline struct omap_dss_device *dss_ovl_get_device(struct omap_overlay *ovl)
+static struct omap_dss_device *dss_mgr_get_device(struct omap_overlay_manager *mgr)
 {
-	return ovl->manager ?
-		(ovl->manager->output ? ovl->manager->output->device : NULL) :
-		NULL;
+	return mgr->output ? mgr->output->device : NULL;
 }
 
-static inline struct omap_dss_device *dss_mgr_get_device(struct omap_overlay_manager *mgr)
+static struct omap_dss_device *dss_ovl_get_device(struct omap_overlay *ovl)
 {
-	return mgr->output ? mgr->output->device : NULL;
+	return ovl->manager ? dss_mgr_get_device(ovl->manager) : NULL;
 }
 
 static int dss_mgr_wait_for_vsync(struct omap_overlay_manager *mgr)
-- 
1.8.1.2

[PATCH 08/32] OMAPDSS: clean up dss_[ovl|mgr]_get_device()

[Tomi Valkeinen]

Minor cleanup for the dss_[ovl|mgr]_get_device() functions to make them
more readable.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/apply.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index a4b356a..b84bd99 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -420,16 +420,14 @@ static void wait_pending_extra_info_updates(void)
 		DSSWARN("timeout in wait_pending_extra_info_updates\n");
 }
 
-static inline struct omap_dss_device *dss_ovl_get_device(struct omap_overlay *ovl)
+static struct omap_dss_device *dss_mgr_get_device(struct omap_overlay_manager *mgr)
 {
-	return ovl->manager ?
-		(ovl->manager->output ? ovl->manager->output->device : NULL) :
-		NULL;
+	return mgr->output ? mgr->output->device : NULL;
 }
 
-static inline struct omap_dss_device *dss_mgr_get_device(struct omap_overlay_manager *mgr)
+static struct omap_dss_device *dss_ovl_get_device(struct omap_overlay *ovl)
 {
-	return mgr->output ? mgr->output->device : NULL;
+	return ovl->manager ? dss_mgr_get_device(ovl->manager) : NULL;
 }
 
 static int dss_mgr_wait_for_vsync(struct omap_overlay_manager *mgr)
-- 
1.8.1.2

[PATCH 09/32] OMAPDSS: add helpers to get mgr or output from display

[Tomi Valkeinen]

Add two helper functions that can be used to find either the DSS output
or the overlay manager that is connected to the given display.

This hides how the output and the manager are actually connected, making
it easier to change the connections in the future.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/gpu/drm/omapdrm/omap_drv.c        |  5 ++++-
 drivers/video/omap2/dss/manager-sysfs.c   |  4 +++-
 drivers/video/omap2/dss/output.c          | 19 +++++++++++++++++++
 drivers/video/omap2/omapfb/omapfb-ioctl.c |  9 +++++++--
 drivers/video/omap2/omapfb/omapfb-main.c  | 16 +++++++---------
 include/video/omapdss.h                   |  3 +++
 6 files changed, 43 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 9c53c25..691e760 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -247,6 +247,9 @@ static int omap_modeset_init(struct drm_device *dev)
 		struct drm_encoder *encoder = priv->encoders[i];
 		struct omap_dss_device *dssdev  					omap_encoder_get_dssdev(encoder);
+		struct omap_dss_output *output;
+
+		output = omapdss_find_output_from_display(dssdev);
 
 		/* figure out which crtc's we can connect the encoder to: */
 		encoder->possible_crtcs = 0;
@@ -259,7 +262,7 @@ static int omap_modeset_init(struct drm_device *dev)
 			supported_outputs  				dss_feat_get_supported_outputs(crtc_channel);
 
-			if (supported_outputs & dssdev->output->id)
+			if (supported_outputs & output->id)
 				encoder->possible_crtcs |= (1 << id);
 		}
 	}
diff --git a/drivers/video/omap2/dss/manager-sysfs.c b/drivers/video/omap2/dss/manager-sysfs.c
index 9a2fb59..5104681 100644
--- a/drivers/video/omap2/dss/manager-sysfs.c
+++ b/drivers/video/omap2/dss/manager-sysfs.c
@@ -78,7 +78,9 @@ static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
 	}
 
 	if (dssdev) {
-		struct omap_dss_output *out = dssdev->output;
+		struct omap_dss_output *out;
+
+		out = omapdss_find_output_from_display(dssdev);
 
 		/*
 		 * a registered device should have an output connected to it
diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index 4d01001..ab2c0f0 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -141,6 +141,25 @@ struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node)
 }
 EXPORT_SYMBOL(omap_dss_find_output_by_node);
 
+struct omap_dss_output *omapdss_find_output_from_display(struct omap_dss_device *dssdev)
+{
+	return dssdev->output;
+}
+EXPORT_SYMBOL(omapdss_find_output_from_display);
+
+struct omap_overlay_manager *omapdss_find_mgr_from_display(struct omap_dss_device *dssdev)
+{
+	struct omap_dss_output *out;
+
+	out = omapdss_find_output_from_display(dssdev);
+
+	if (out = NULL)
+		return NULL;
+
+	return out->manager;
+}
+EXPORT_SYMBOL(omapdss_find_mgr_from_display);
+
 static const struct dss_mgr_ops *dss_mgr_ops;
 
 int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)
diff --git a/drivers/video/omap2/omapfb/omapfb-ioctl.c b/drivers/video/omap2/omapfb/omapfb-ioctl.c
index d30b45d..146b6f5 100644
--- a/drivers/video/omap2/omapfb/omapfb-ioctl.c
+++ b/drivers/video/omap2/omapfb/omapfb-ioctl.c
@@ -770,12 +770,17 @@ int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg)
 
 	case OMAPFB_WAITFORVSYNC:
 		DBG("ioctl WAITFORVSYNC\n");
-		if (!display || !display->output || !display->output->manager) {
+
+		if (!display) {
 			r = -EINVAL;
 			break;
 		}
 
-		mgr = display->output->manager;
+		mgr = omapdss_find_mgr_from_display(display);
+		if (!mgr) {
+			r = -EINVAL;
+			break;
+		}
 
 		r = mgr->wait_for_vsync(mgr);
 		break;
diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index c84bb8a..dd972c5 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -2363,18 +2363,16 @@ static int omapfb_init_connections(struct omapfb2_device *fbdev,
 	int i, r;
 	struct omap_overlay_manager *mgr;
 
-	if (!def_dssdev->output) {
-		dev_err(fbdev->dev, "no output for the default display\n");
-		return -EINVAL;
-	}
-
 	for (i = 0; i < fbdev->num_displays; ++i) {
 		struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
-		struct omap_dss_output *out = dssdev->output;
+		struct omap_dss_output *out;
 
-		mgr = omap_dss_get_overlay_manager(out->dispc_channel);
+		out = omapdss_find_output_from_display(dssdev);
+		if (!out)
+			continue;
 
-		if (!mgr || !out)
+		mgr = omap_dss_get_overlay_manager(out->dispc_channel);
+		if (!mgr)
 			continue;
 
 		if (mgr->output)
@@ -2383,7 +2381,7 @@ static int omapfb_init_connections(struct omapfb2_device *fbdev,
 		mgr->set_output(mgr, out);
 	}
 
-	mgr = def_dssdev->output->manager;
+	mgr = omapdss_find_mgr_from_display(def_dssdev);
 
 	if (!mgr) {
 		dev_err(fbdev->dev, "no ovl manager for the default display\n");
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 7fe6144..68b2345 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -785,6 +785,9 @@ int omapdss_output_set_device(struct omap_dss_output *out,
 		struct omap_dss_device *dssdev);
 int omapdss_output_unset_device(struct omap_dss_output *out);
 
+struct omap_dss_output *omapdss_find_output_from_display(struct omap_dss_device *dssdev);
+struct omap_overlay_manager *omapdss_find_mgr_from_display(struct omap_dss_device *dssdev);
+
 void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
 		u16 *xres, u16 *yres);
 int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev);
-- 
1.8.1.2

[PATCH 09/32] OMAPDSS: add helpers to get mgr or output from display

[Tomi Valkeinen]

Add two helper functions that can be used to find either the DSS output
or the overlay manager that is connected to the given display.

This hides how the output and the manager are actually connected, making
it easier to change the connections in the future.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/gpu/drm/omapdrm/omap_drv.c        |  5 ++++-
 drivers/video/omap2/dss/manager-sysfs.c   |  4 +++-
 drivers/video/omap2/dss/output.c          | 19 +++++++++++++++++++
 drivers/video/omap2/omapfb/omapfb-ioctl.c |  9 +++++++--
 drivers/video/omap2/omapfb/omapfb-main.c  | 16 +++++++---------
 include/video/omapdss.h                   |  3 +++
 6 files changed, 43 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 9c53c25..691e760 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -247,6 +247,9 @@ static int omap_modeset_init(struct drm_device *dev)
 		struct drm_encoder *encoder = priv->encoders[i];
 		struct omap_dss_device *dssdev =
 					omap_encoder_get_dssdev(encoder);
+		struct omap_dss_output *output;
+
+		output = omapdss_find_output_from_display(dssdev);
 
 		/* figure out which crtc's we can connect the encoder to: */
 		encoder->possible_crtcs = 0;
@@ -259,7 +262,7 @@ static int omap_modeset_init(struct drm_device *dev)
 			supported_outputs =
 				dss_feat_get_supported_outputs(crtc_channel);
 
-			if (supported_outputs & dssdev->output->id)
+			if (supported_outputs & output->id)
 				encoder->possible_crtcs |= (1 << id);
 		}
 	}
diff --git a/drivers/video/omap2/dss/manager-sysfs.c b/drivers/video/omap2/dss/manager-sysfs.c
index 9a2fb59..5104681 100644
--- a/drivers/video/omap2/dss/manager-sysfs.c
+++ b/drivers/video/omap2/dss/manager-sysfs.c
@@ -78,7 +78,9 @@ static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
 	}
 
 	if (dssdev) {
-		struct omap_dss_output *out = dssdev->output;
+		struct omap_dss_output *out;
+
+		out = omapdss_find_output_from_display(dssdev);
 
 		/*
 		 * a registered device should have an output connected to it
diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index 4d01001..ab2c0f0 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -141,6 +141,25 @@ struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node)
 }
 EXPORT_SYMBOL(omap_dss_find_output_by_node);
 
+struct omap_dss_output *omapdss_find_output_from_display(struct omap_dss_device *dssdev)
+{
+	return dssdev->output;
+}
+EXPORT_SYMBOL(omapdss_find_output_from_display);
+
+struct omap_overlay_manager *omapdss_find_mgr_from_display(struct omap_dss_device *dssdev)
+{
+	struct omap_dss_output *out;
+
+	out = omapdss_find_output_from_display(dssdev);
+
+	if (out == NULL)
+		return NULL;
+
+	return out->manager;
+}
+EXPORT_SYMBOL(omapdss_find_mgr_from_display);
+
 static const struct dss_mgr_ops *dss_mgr_ops;
 
 int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)
diff --git a/drivers/video/omap2/omapfb/omapfb-ioctl.c b/drivers/video/omap2/omapfb/omapfb-ioctl.c
index d30b45d..146b6f5 100644
--- a/drivers/video/omap2/omapfb/omapfb-ioctl.c
+++ b/drivers/video/omap2/omapfb/omapfb-ioctl.c
@@ -770,12 +770,17 @@ int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg)
 
 	case OMAPFB_WAITFORVSYNC:
 		DBG("ioctl WAITFORVSYNC\n");
-		if (!display || !display->output || !display->output->manager) {
+
+		if (!display) {
 			r = -EINVAL;
 			break;
 		}
 
-		mgr = display->output->manager;
+		mgr = omapdss_find_mgr_from_display(display);
+		if (!mgr) {
+			r = -EINVAL;
+			break;
+		}
 
 		r = mgr->wait_for_vsync(mgr);
 		break;
diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index c84bb8a..dd972c5 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -2363,18 +2363,16 @@ static int omapfb_init_connections(struct omapfb2_device *fbdev,
 	int i, r;
 	struct omap_overlay_manager *mgr;
 
-	if (!def_dssdev->output) {
-		dev_err(fbdev->dev, "no output for the default display\n");
-		return -EINVAL;
-	}
-
 	for (i = 0; i < fbdev->num_displays; ++i) {
 		struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
-		struct omap_dss_output *out = dssdev->output;
+		struct omap_dss_output *out;
 
-		mgr = omap_dss_get_overlay_manager(out->dispc_channel);
+		out = omapdss_find_output_from_display(dssdev);
+		if (!out)
+			continue;
 
-		if (!mgr || !out)
+		mgr = omap_dss_get_overlay_manager(out->dispc_channel);
+		if (!mgr)
 			continue;
 
 		if (mgr->output)
@@ -2383,7 +2381,7 @@ static int omapfb_init_connections(struct omapfb2_device *fbdev,
 		mgr->set_output(mgr, out);
 	}
 
-	mgr = def_dssdev->output->manager;
+	mgr = omapdss_find_mgr_from_display(def_dssdev);
 
 	if (!mgr) {
 		dev_err(fbdev->dev, "no ovl manager for the default display\n");
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 7fe6144..68b2345 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -785,6 +785,9 @@ int omapdss_output_set_device(struct omap_dss_output *out,
 		struct omap_dss_device *dssdev);
 int omapdss_output_unset_device(struct omap_dss_output *out);
 
+struct omap_dss_output *omapdss_find_output_from_display(struct omap_dss_device *dssdev);
+struct omap_overlay_manager *omapdss_find_mgr_from_display(struct omap_dss_device *dssdev);
+
 void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
 		u16 *xres, u16 *yres);
 int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev);
-- 
1.8.1.2

[PATCH 10/32] OMAPDSS: split overlay manager creation

[Tomi Valkeinen]

Split the function that creates overlay manager structs into two: one
that creates just the structs, and one that creates the sysfs files for
the manager.

This will help us use the overlay manager structs with omapdrm in the
following patches, while still leaving the sysfs files out.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/apply.c         |  9 ++++++---
 drivers/video/omap2/dss/dss.h           |  6 ++++--
 drivers/video/omap2/dss/manager-sysfs.c |  2 ++
 drivers/video/omap2/dss/manager.c       | 29 ++++++++++++++++++++++-------
 4 files changed, 34 insertions(+), 12 deletions(-)

diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index b84bd99..74d1d00 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -1577,7 +1577,8 @@ int omapdss_compat_init(void)
 
 	apply_init_priv();
 
-	dss_init_overlay_managers(pdev);
+	dss_init_overlay_managers();
+	dss_init_overlay_managers_sysfs(pdev);
 	dss_init_overlays(pdev);
 
 	for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) {
@@ -1640,7 +1641,8 @@ err_disp_sysfs:
 	dss_uninstall_mgr_ops();
 
 err_mgr_ops:
-	dss_uninit_overlay_managers(pdev);
+	dss_uninit_overlay_managers_sysfs(pdev);
+	dss_uninit_overlay_managers();
 	dss_uninit_overlays(pdev);
 
 	compat_refcnt--;
@@ -1668,7 +1670,8 @@ void omapdss_compat_uninit(void)
 
 	dss_uninstall_mgr_ops();
 
-	dss_uninit_overlay_managers(pdev);
+	dss_uninit_overlay_managers_sysfs(pdev);
+	dss_uninit_overlay_managers();
 	dss_uninit_overlays(pdev);
 out:
 	mutex_unlock(&compat_init_lock);
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 8475893..7964d3b 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -194,8 +194,10 @@ void display_uninit_sysfs(struct platform_device *pdev,
 		struct omap_dss_device *dssdev);
 
 /* manager */
-int dss_init_overlay_managers(struct platform_device *pdev);
-void dss_uninit_overlay_managers(struct platform_device *pdev);
+int dss_init_overlay_managers(void);
+void dss_uninit_overlay_managers(void);
+int dss_init_overlay_managers_sysfs(struct platform_device *pdev);
+void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev);
 int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
 		const struct omap_overlay_manager_info *info);
 int dss_mgr_check_timings(struct omap_overlay_manager *mgr,
diff --git a/drivers/video/omap2/dss/manager-sysfs.c b/drivers/video/omap2/dss/manager-sysfs.c
index 5104681..72784b3 100644
--- a/drivers/video/omap2/dss/manager-sysfs.c
+++ b/drivers/video/omap2/dss/manager-sysfs.c
@@ -511,4 +511,6 @@ void dss_manager_kobj_uninit(struct omap_overlay_manager *mgr)
 {
 	kobject_del(&mgr->kobj);
 	kobject_put(&mgr->kobj);
+
+	memset(&mgr->kobj, 0, sizeof(mgr->kobj));
 }
diff --git a/drivers/video/omap2/dss/manager.c b/drivers/video/omap2/dss/manager.c
index 2551eaa..1aac9b4 100644
--- a/drivers/video/omap2/dss/manager.c
+++ b/drivers/video/omap2/dss/manager.c
@@ -36,9 +36,9 @@
 static int num_managers;
 static struct omap_overlay_manager *managers;
 
-int dss_init_overlay_managers(struct platform_device *pdev)
+int dss_init_overlay_managers(void)
 {
-	int i, r;
+	int i;
 
 	num_managers = dss_feat_get_num_mgrs();
 
@@ -76,6 +76,17 @@ int dss_init_overlay_managers(struct platform_device *pdev)
 			dss_feat_get_supported_outputs(mgr->id);
 
 		INIT_LIST_HEAD(&mgr->overlays);
+	}
+
+	return 0;
+}
+
+int dss_init_overlay_managers_sysfs(struct platform_device *pdev)
+{
+	int i, r;
+
+	for (i = 0; i < num_managers; ++i) {
+		struct omap_overlay_manager *mgr = &managers[i];
 
 		r = dss_manager_kobj_init(mgr, pdev);
 		if (r)
@@ -85,18 +96,22 @@ int dss_init_overlay_managers(struct platform_device *pdev)
 	return 0;
 }
 
-void dss_uninit_overlay_managers(struct platform_device *pdev)
+void dss_uninit_overlay_managers(void)
+{
+	kfree(managers);
+	managers = NULL;
+	num_managers = 0;
+}
+
+void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev)
 {
 	int i;
 
 	for (i = 0; i < num_managers; ++i) {
 		struct omap_overlay_manager *mgr = &managers[i];
+
 		dss_manager_kobj_uninit(mgr);
 	}
-
-	kfree(managers);
-	managers = NULL;
-	num_managers = 0;
 }
 
 int omap_dss_get_num_overlay_managers(void)
-- 
1.8.1.2

[PATCH 10/32] OMAPDSS: split overlay manager creation

[Tomi Valkeinen]

Split the function that creates overlay manager structs into two: one
that creates just the structs, and one that creates the sysfs files for
the manager.

This will help us use the overlay manager structs with omapdrm in the
following patches, while still leaving the sysfs files out.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/apply.c         |  9 ++++++---
 drivers/video/omap2/dss/dss.h           |  6 ++++--
 drivers/video/omap2/dss/manager-sysfs.c |  2 ++
 drivers/video/omap2/dss/manager.c       | 29 ++++++++++++++++++++++-------
 4 files changed, 34 insertions(+), 12 deletions(-)

diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index b84bd99..74d1d00 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -1577,7 +1577,8 @@ int omapdss_compat_init(void)
 
 	apply_init_priv();
 
-	dss_init_overlay_managers(pdev);
+	dss_init_overlay_managers();
+	dss_init_overlay_managers_sysfs(pdev);
 	dss_init_overlays(pdev);
 
 	for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) {
@@ -1640,7 +1641,8 @@ err_disp_sysfs:
 	dss_uninstall_mgr_ops();
 
 err_mgr_ops:
-	dss_uninit_overlay_managers(pdev);
+	dss_uninit_overlay_managers_sysfs(pdev);
+	dss_uninit_overlay_managers();
 	dss_uninit_overlays(pdev);
 
 	compat_refcnt--;
@@ -1668,7 +1670,8 @@ void omapdss_compat_uninit(void)
 
 	dss_uninstall_mgr_ops();
 
-	dss_uninit_overlay_managers(pdev);
+	dss_uninit_overlay_managers_sysfs(pdev);
+	dss_uninit_overlay_managers();
 	dss_uninit_overlays(pdev);
 out:
 	mutex_unlock(&compat_init_lock);
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 8475893..7964d3b 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -194,8 +194,10 @@ void display_uninit_sysfs(struct platform_device *pdev,
 		struct omap_dss_device *dssdev);
 
 /* manager */
-int dss_init_overlay_managers(struct platform_device *pdev);
-void dss_uninit_overlay_managers(struct platform_device *pdev);
+int dss_init_overlay_managers(void);
+void dss_uninit_overlay_managers(void);
+int dss_init_overlay_managers_sysfs(struct platform_device *pdev);
+void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev);
 int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
 		const struct omap_overlay_manager_info *info);
 int dss_mgr_check_timings(struct omap_overlay_manager *mgr,
diff --git a/drivers/video/omap2/dss/manager-sysfs.c b/drivers/video/omap2/dss/manager-sysfs.c
index 5104681..72784b3 100644
--- a/drivers/video/omap2/dss/manager-sysfs.c
+++ b/drivers/video/omap2/dss/manager-sysfs.c
@@ -511,4 +511,6 @@ void dss_manager_kobj_uninit(struct omap_overlay_manager *mgr)
 {
 	kobject_del(&mgr->kobj);
 	kobject_put(&mgr->kobj);
+
+	memset(&mgr->kobj, 0, sizeof(mgr->kobj));
 }
diff --git a/drivers/video/omap2/dss/manager.c b/drivers/video/omap2/dss/manager.c
index 2551eaa..1aac9b4 100644
--- a/drivers/video/omap2/dss/manager.c
+++ b/drivers/video/omap2/dss/manager.c
@@ -36,9 +36,9 @@
 static int num_managers;
 static struct omap_overlay_manager *managers;
 
-int dss_init_overlay_managers(struct platform_device *pdev)
+int dss_init_overlay_managers(void)
 {
-	int i, r;
+	int i;
 
 	num_managers = dss_feat_get_num_mgrs();
 
@@ -76,6 +76,17 @@ int dss_init_overlay_managers(struct platform_device *pdev)
 			dss_feat_get_supported_outputs(mgr->id);
 
 		INIT_LIST_HEAD(&mgr->overlays);
+	}
+
+	return 0;
+}
+
+int dss_init_overlay_managers_sysfs(struct platform_device *pdev)
+{
+	int i, r;
+
+	for (i = 0; i < num_managers; ++i) {
+		struct omap_overlay_manager *mgr = &managers[i];
 
 		r = dss_manager_kobj_init(mgr, pdev);
 		if (r)
@@ -85,18 +96,22 @@ int dss_init_overlay_managers(struct platform_device *pdev)
 	return 0;
 }
 
-void dss_uninit_overlay_managers(struct platform_device *pdev)
+void dss_uninit_overlay_managers(void)
+{
+	kfree(managers);
+	managers = NULL;
+	num_managers = 0;
+}
+
+void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev)
 {
 	int i;
 
 	for (i = 0; i < num_managers; ++i) {
 		struct omap_overlay_manager *mgr = &managers[i];
+
 		dss_manager_kobj_uninit(mgr);
 	}
-
-	kfree(managers);
-	managers = NULL;
-	num_managers = 0;
 }
 
 int omap_dss_get_num_overlay_managers(void)
-- 
1.8.1.2

[PATCH 11/32] OMAPDRM: fix overlay manager handling

[Tomi Valkeinen]

Currently omapdrm creates crtcs, which map directly to DSS overlay
managers, only on demand at init time. This would make it difficult to
manage connecting the display entities in the future, as the code cannot
just search for a suitable overlay manager.

We cannot fix this the sane way, which would be to create crtcs for each
overlay manager, because we need an overlay for each crtc. With limited
number of overlays, that's not possible.

So the solution for now is to detach the overlay manager from the crtc.
crtcs are still created on demand at init time, but all overlay managers
are always initialized by the omapdss.

This way we can create and connect whole display pipelines from the
overlay manager to the display, regardless of which crtcs omapdrm would
create.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/gpu/drm/omapdrm/omap_crtc.c | 22 +++++++++++++++-------
 drivers/gpu/drm/omapdrm/omap_drv.c  |  2 ++
 drivers/gpu/drm/omapdrm/omap_drv.h  |  1 +
 drivers/video/omap2/dss/apply.c     |  3 ---
 drivers/video/omap2/dss/dispc.c     |  4 ++++
 5 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 79b200a..02075bf 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -40,7 +40,7 @@ struct omap_crtc {
 	 * mgr->id.)  Eventually this will be replaced w/ something
 	 * more common-panel-framework-y
 	 */
-	struct omap_overlay_manager mgr;
+	struct omap_overlay_manager *mgr;
 
 	struct omap_video_timings timings;
 	bool enabled;
@@ -90,6 +90,9 @@ uint32_t pipe2vbl(struct drm_crtc *crtc)
  * job of sequencing the setup of the video pipe in the proper order
  */
 
+/* ovl-mgr-id -> crtc */
+static struct omap_crtc *omap_crtcs[8];
+
 /* we can probably ignore these until we support command-mode panels: */
 static void omap_crtc_start_update(struct omap_overlay_manager *mgr)
 {
@@ -107,7 +110,7 @@ static void omap_crtc_disable(struct omap_overlay_manager *mgr)
 static void omap_crtc_set_timings(struct omap_overlay_manager *mgr,
 		const struct omap_video_timings *timings)
 {
-	struct omap_crtc *omap_crtc = container_of(mgr, struct omap_crtc, mgr);
+	struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
 	DBG("%s", omap_crtc->name);
 	omap_crtc->timings = *timings;
 	omap_crtc->full_update = true;
@@ -116,7 +119,7 @@ static void omap_crtc_set_timings(struct omap_overlay_manager *mgr,
 static void omap_crtc_set_lcd_config(struct omap_overlay_manager *mgr,
 		const struct dss_lcd_mgr_config *config)
 {
-	struct omap_crtc *omap_crtc = container_of(mgr, struct omap_crtc, mgr);
+	struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
 	DBG("%s", omap_crtc->name);
 	dispc_mgr_set_lcd_config(omap_crtc->channel, config);
 }
@@ -569,7 +572,7 @@ static void omap_crtc_pre_apply(struct omap_drm_apply *apply)
 	} else {
 		if (encoder) {
 			omap_encoder_set_enabled(encoder, false);
-			omap_encoder_update(encoder, &omap_crtc->mgr,
+			omap_encoder_update(encoder, omap_crtc->mgr,
 					&omap_crtc->timings);
 			omap_encoder_set_enabled(encoder, true);
 			omap_crtc->full_update = false;
@@ -595,6 +598,11 @@ static const char *channel_names[] = {
 		[OMAP_DSS_CHANNEL_LCD2] = "lcd2",
 };
 
+void omap_crtc_pre_init(void)
+{
+	dss_install_mgr_ops(&mgr_ops);
+}
+
 /* initialize crtc */
 struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 		struct drm_plane *plane, enum omap_channel channel, int id)
@@ -635,9 +643,7 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 	omap_irq_register(dev, &omap_crtc->error_irq);
 
 	/* temporary: */
-	omap_crtc->mgr.id = channel;
-
-	dss_install_mgr_ops(&mgr_ops);
+	omap_crtc->mgr = omap_dss_get_overlay_manager(channel);
 
 	/* TODO: fix hard-coded setup.. add properties! */
 	info = &omap_crtc->info;
@@ -651,6 +657,8 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 
 	omap_plane_install_properties(omap_crtc->plane, &crtc->base);
 
+	omap_crtcs[channel] = omap_crtc;
+
 	return crtc;
 
 fail:
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 691e760..f8947f9 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -98,6 +98,8 @@ static int omap_modeset_init(struct drm_device *dev)
 	int num_crtcs;
 	int i, id = 0;
 
+	omap_crtc_pre_init();
+
 	drm_mode_config_init(dev);
 
 	omap_drm_irq_install(dev);
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h b/drivers/gpu/drm/omapdrm/omap_drv.h
index 215a20d..14f17da 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.h
+++ b/drivers/gpu/drm/omapdrm/omap_drv.h
@@ -157,6 +157,7 @@ const struct omap_video_timings *omap_crtc_timings(struct drm_crtc *crtc);
 enum omap_channel omap_crtc_channel(struct drm_crtc *crtc);
 int omap_crtc_apply(struct drm_crtc *crtc,
 		struct omap_drm_apply *apply);
+void omap_crtc_pre_init(void);
 struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 		struct drm_plane *plane, enum omap_channel channel, int id);
 
diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index 74d1d00..c844071 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -1577,7 +1577,6 @@ int omapdss_compat_init(void)
 
 	apply_init_priv();
 
-	dss_init_overlay_managers();
 	dss_init_overlay_managers_sysfs(pdev);
 	dss_init_overlays(pdev);
 
@@ -1642,7 +1641,6 @@ err_disp_sysfs:
 
 err_mgr_ops:
 	dss_uninit_overlay_managers_sysfs(pdev);
-	dss_uninit_overlay_managers();
 	dss_uninit_overlays(pdev);
 
 	compat_refcnt--;
@@ -1671,7 +1669,6 @@ void omapdss_compat_uninit(void)
 	dss_uninstall_mgr_ops();
 
 	dss_uninit_overlay_managers_sysfs(pdev);
-	dss_uninit_overlay_managers();
 	dss_uninit_overlays(pdev);
 out:
 	mutex_unlock(&compat_init_lock);
diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index b33b016..83d7bb9 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -3710,6 +3710,8 @@ static int __init omap_dispchw_probe(struct platform_device *pdev)
 
 	dispc_runtime_put();
 
+	dss_init_overlay_managers();
+
 	dss_debugfs_create_file("dispc", dispc_dump_regs);
 
 	return 0;
@@ -3723,6 +3725,8 @@ static int __exit omap_dispchw_remove(struct platform_device *pdev)
 {
 	pm_runtime_disable(&pdev->dev);
 
+	dss_uninit_overlay_managers();
+
 	return 0;
 }
 
-- 
1.8.1.2

[PATCH 11/32] OMAPDRM: fix overlay manager handling

[Tomi Valkeinen]

Currently omapdrm creates crtcs, which map directly to DSS overlay
managers, only on demand at init time. This would make it difficult to
manage connecting the display entities in the future, as the code cannot
just search for a suitable overlay manager.

We cannot fix this the sane way, which would be to create crtcs for each
overlay manager, because we need an overlay for each crtc. With limited
number of overlays, that's not possible.

So the solution for now is to detach the overlay manager from the crtc.
crtcs are still created on demand at init time, but all overlay managers
are always initialized by the omapdss.

This way we can create and connect whole display pipelines from the
overlay manager to the display, regardless of which crtcs omapdrm would
create.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/gpu/drm/omapdrm/omap_crtc.c | 22 +++++++++++++++-------
 drivers/gpu/drm/omapdrm/omap_drv.c  |  2 ++
 drivers/gpu/drm/omapdrm/omap_drv.h  |  1 +
 drivers/video/omap2/dss/apply.c     |  3 ---
 drivers/video/omap2/dss/dispc.c     |  4 ++++
 5 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 79b200a..02075bf 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -40,7 +40,7 @@ struct omap_crtc {
 	 * mgr->id.)  Eventually this will be replaced w/ something
 	 * more common-panel-framework-y
 	 */
-	struct omap_overlay_manager mgr;
+	struct omap_overlay_manager *mgr;
 
 	struct omap_video_timings timings;
 	bool enabled;
@@ -90,6 +90,9 @@ uint32_t pipe2vbl(struct drm_crtc *crtc)
  * job of sequencing the setup of the video pipe in the proper order
  */
 
+/* ovl-mgr-id -> crtc */
+static struct omap_crtc *omap_crtcs[8];
+
 /* we can probably ignore these until we support command-mode panels: */
 static void omap_crtc_start_update(struct omap_overlay_manager *mgr)
 {
@@ -107,7 +110,7 @@ static void omap_crtc_disable(struct omap_overlay_manager *mgr)
 static void omap_crtc_set_timings(struct omap_overlay_manager *mgr,
 		const struct omap_video_timings *timings)
 {
-	struct omap_crtc *omap_crtc = container_of(mgr, struct omap_crtc, mgr);
+	struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
 	DBG("%s", omap_crtc->name);
 	omap_crtc->timings = *timings;
 	omap_crtc->full_update = true;
@@ -116,7 +119,7 @@ static void omap_crtc_set_timings(struct omap_overlay_manager *mgr,
 static void omap_crtc_set_lcd_config(struct omap_overlay_manager *mgr,
 		const struct dss_lcd_mgr_config *config)
 {
-	struct omap_crtc *omap_crtc = container_of(mgr, struct omap_crtc, mgr);
+	struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
 	DBG("%s", omap_crtc->name);
 	dispc_mgr_set_lcd_config(omap_crtc->channel, config);
 }
@@ -569,7 +572,7 @@ static void omap_crtc_pre_apply(struct omap_drm_apply *apply)
 	} else {
 		if (encoder) {
 			omap_encoder_set_enabled(encoder, false);
-			omap_encoder_update(encoder, &omap_crtc->mgr,
+			omap_encoder_update(encoder, omap_crtc->mgr,
 					&omap_crtc->timings);
 			omap_encoder_set_enabled(encoder, true);
 			omap_crtc->full_update = false;
@@ -595,6 +598,11 @@ static const char *channel_names[] = {
 		[OMAP_DSS_CHANNEL_LCD2] = "lcd2",
 };
 
+void omap_crtc_pre_init(void)
+{
+	dss_install_mgr_ops(&mgr_ops);
+}
+
 /* initialize crtc */
 struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 		struct drm_plane *plane, enum omap_channel channel, int id)
@@ -635,9 +643,7 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 	omap_irq_register(dev, &omap_crtc->error_irq);
 
 	/* temporary: */
-	omap_crtc->mgr.id = channel;
-
-	dss_install_mgr_ops(&mgr_ops);
+	omap_crtc->mgr = omap_dss_get_overlay_manager(channel);
 
 	/* TODO: fix hard-coded setup.. add properties! */
 	info = &omap_crtc->info;
@@ -651,6 +657,8 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 
 	omap_plane_install_properties(omap_crtc->plane, &crtc->base);
 
+	omap_crtcs[channel] = omap_crtc;
+
 	return crtc;
 
 fail:
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 691e760..f8947f9 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -98,6 +98,8 @@ static int omap_modeset_init(struct drm_device *dev)
 	int num_crtcs;
 	int i, id = 0;
 
+	omap_crtc_pre_init();
+
 	drm_mode_config_init(dev);
 
 	omap_drm_irq_install(dev);
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h b/drivers/gpu/drm/omapdrm/omap_drv.h
index 215a20d..14f17da 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.h
+++ b/drivers/gpu/drm/omapdrm/omap_drv.h
@@ -157,6 +157,7 @@ const struct omap_video_timings *omap_crtc_timings(struct drm_crtc *crtc);
 enum omap_channel omap_crtc_channel(struct drm_crtc *crtc);
 int omap_crtc_apply(struct drm_crtc *crtc,
 		struct omap_drm_apply *apply);
+void omap_crtc_pre_init(void);
 struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 		struct drm_plane *plane, enum omap_channel channel, int id);
 
diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index 74d1d00..c844071 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -1577,7 +1577,6 @@ int omapdss_compat_init(void)
 
 	apply_init_priv();
 
-	dss_init_overlay_managers();
 	dss_init_overlay_managers_sysfs(pdev);
 	dss_init_overlays(pdev);
 
@@ -1642,7 +1641,6 @@ err_disp_sysfs:
 
 err_mgr_ops:
 	dss_uninit_overlay_managers_sysfs(pdev);
-	dss_uninit_overlay_managers();
 	dss_uninit_overlays(pdev);
 
 	compat_refcnt--;
@@ -1671,7 +1669,6 @@ void omapdss_compat_uninit(void)
 	dss_uninstall_mgr_ops();
 
 	dss_uninit_overlay_managers_sysfs(pdev);
-	dss_uninit_overlay_managers();
 	dss_uninit_overlays(pdev);
 out:
 	mutex_unlock(&compat_init_lock);
diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index b33b016..83d7bb9 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -3710,6 +3710,8 @@ static int __init omap_dispchw_probe(struct platform_device *pdev)
 
 	dispc_runtime_put();
 
+	dss_init_overlay_managers();
+
 	dss_debugfs_create_file("dispc", dispc_dump_regs);
 
 	return 0;
@@ -3723,6 +3725,8 @@ static int __exit omap_dispchw_remove(struct platform_device *pdev)
 {
 	pm_runtime_disable(&pdev->dev);
 
+	dss_uninit_overlay_managers();
+
 	return 0;
 }
 
-- 
1.8.1.2

[PATCH 12/32] OMAPDSS: Implement display (dis)connect support

[Tomi Valkeinen]

We currently have two steps in panel initialization and startup: probing
and enabling. After the panel has been probed, it's ready and can be
configured and later enabled.

This model is not enough with more complex display pipelines, where we
may have, for example, two panels, of which only one can be used at a
time, connected to the same video output.

To support that kind of scenarios, we need to add new step to the
initialization: connect.

This patch adds support for connecting and disconnecting panels. After
probe, but before connect, no panel ops should be called. When the
connect is called, a proper video pipeline is established, and the panel
is ready for use. If some part in the video pipeline is already
connected (by some other panel), the connect call fails.

One key difference with the old style setup is that connect() handles
also connecting to the overlay manager. This means that the omapfb (or
omapdrm) no longer needs to figure out which overlay manager to use, but
it can just call connect() on the panel, and the proper overlay manager
is connected by omapdss.

This also allows us to add back the support for dynamic switching
between two exclusive panels. However, the current panel device model is
not changed to support this, as the new device model is implemented in
the following patches and the old model will be removed. The new device
model supports dynamic switching.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/gpu/drm/omapdrm/omap_crtc.c      | 24 +++++++++++++++++
 drivers/gpu/drm/omapdrm/omap_drv.c       | 12 ++++++++-
 drivers/video/omap2/dss/apply.c          | 14 ++++++++++
 drivers/video/omap2/dss/core.c           | 44 +++++++++++++++++++++++++++++++
 drivers/video/omap2/dss/display-sysfs.c  | 28 +++++++++++---------
 drivers/video/omap2/dss/manager-sysfs.c  | 45 ++++++++++++++++++++------------
 drivers/video/omap2/dss/output.c         | 14 ++++++++++
 drivers/video/omap2/omapfb/omapfb-main.c | 25 ++++++++++--------
 include/video/omapdss.h                  | 23 ++++++++++++++++
 9 files changed, 188 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 02075bf..b2ab2f5 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -94,6 +94,28 @@ uint32_t pipe2vbl(struct drm_crtc *crtc)
 static struct omap_crtc *omap_crtcs[8];
 
 /* we can probably ignore these until we support command-mode panels: */
+static int omap_crtc_connect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	if (mgr->output)
+		return -EINVAL;
+
+	if ((mgr->supported_outputs & dst->id) = 0)
+		return -EINVAL;
+
+	dst->manager = mgr;
+	mgr->output = dst;
+
+	return 0;
+}
+
+static void omap_crtc_disconnect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	mgr->output->manager = NULL;
+	mgr->output = NULL;
+}
+
 static void omap_crtc_start_update(struct omap_overlay_manager *mgr)
 {
 }
@@ -138,6 +160,8 @@ static void omap_crtc_unregister_framedone_handler(
 }
 
 static const struct dss_mgr_ops mgr_ops = {
+		.connect = omap_crtc_connect,
+		.disconnect = omap_crtc_disconnect,
 		.start_update = omap_crtc_start_update,
 		.enable = omap_crtc_enable,
 		.disable = omap_crtc_disable,
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index f8947f9..58bd259 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -97,6 +97,7 @@ static int omap_modeset_init(struct drm_device *dev)
 	int num_mgrs = dss_feat_get_num_mgrs();
 	int num_crtcs;
 	int i, id = 0;
+	int r;
 
 	omap_crtc_pre_init();
 
@@ -118,6 +119,7 @@ static int omap_modeset_init(struct drm_device *dev)
 		struct drm_connector *connector;
 		struct drm_encoder *encoder;
 		enum omap_channel channel;
+		struct omap_overlay_manager *mgr;
 
 		if (!dssdev->driver) {
 			dev_warn(dev->dev, "%s has no driver.. skipping it\n",
@@ -133,6 +135,13 @@ static int omap_modeset_init(struct drm_device *dev)
 			continue;
 		}
 
+		r = dssdev->driver->connect(dssdev);
+		if (r) {
+			dev_err(dev->dev, "could not connect display: %s\n",
+					dssdev->name);
+			continue;
+		}
+
 		encoder = omap_encoder_init(dev, dssdev);
 
 		if (!encoder) {
@@ -174,8 +183,9 @@ static int omap_modeset_init(struct drm_device *dev)
 		 * other possible channels to which the encoder can connect are
 		 * not considered.
 		 */
-		channel = dssdev->output->dispc_channel;
 
+		mgr = omapdss_find_mgr_from_display(dssdev);
+		channel = mgr->id;
 		/*
 		 * if this channel hasn't already been taken by a previously
 		 * allocated crtc, we create a new crtc for it
diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index c844071..dbd3c2f 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -790,6 +790,18 @@ static void mgr_clear_shadow_dirty(struct omap_overlay_manager *mgr)
 	}
 }
 
+static int dss_mgr_connect_compat(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	return mgr->set_output(mgr, dst);
+}
+
+static void dss_mgr_disconnect_compat(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	mgr->unset_output(mgr);
+}
+
 static void dss_mgr_start_update_compat(struct omap_overlay_manager *mgr)
 {
 	struct mgr_priv_data *mp = get_mgr_priv(mgr);
@@ -1552,6 +1564,8 @@ static void dss_mgr_unregister_framedone_handler_compat(struct omap_overlay_mana
 }
 
 static const struct dss_mgr_ops apply_mgr_ops = {
+	.connect = dss_mgr_connect_compat,
+	.disconnect = dss_mgr_disconnect_compat,
 	.start_update = dss_mgr_start_update_compat,
 	.enable = dss_mgr_enable_compat,
 	.disable = dss_mgr_disable_compat,
diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 502ec1b..4bd8f79 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -371,6 +371,46 @@ static int dss_driver_remove(struct device *dev)
 	return 0;
 }
 
+static int omapdss_default_connect(struct omap_dss_device *dssdev)
+{
+	struct omap_dss_output *out;
+	struct omap_overlay_manager *mgr;
+	int r;
+
+	out = dssdev->output;
+
+	if (out = NULL)
+		return -ENODEV;
+
+	mgr = omap_dss_get_overlay_manager(out->dispc_channel);
+	if (!mgr)
+		return -ENODEV;
+
+	r = dss_mgr_connect(mgr, out);
+	if (r)
+		return r;
+
+	return 0;
+}
+
+static void omapdss_default_disconnect(struct omap_dss_device *dssdev)
+{
+	struct omap_dss_output *out;
+	struct omap_overlay_manager *mgr;
+
+	out = dssdev->output;
+
+	if (out = NULL)
+		return;
+
+	mgr = out->manager;
+
+	if (mgr = NULL)
+		return;
+
+	dss_mgr_disconnect(mgr, out);
+}
+
 int omap_dss_register_driver(struct omap_dss_driver *dssdriver)
 {
 	dssdriver->driver.bus = &dss_bus_type;
@@ -384,6 +424,10 @@ int omap_dss_register_driver(struct omap_dss_driver *dssdriver)
 			omapdss_default_get_recommended_bpp;
 	if (dssdriver->get_timings = NULL)
 		dssdriver->get_timings = omapdss_default_get_timings;
+	if (dssdriver->connect = NULL)
+		dssdriver->connect = omapdss_default_connect;
+	if (dssdriver->disconnect = NULL)
+		dssdriver->disconnect = omapdss_default_disconnect;
 
 	return driver_register(&dssdriver->driver);
 }
diff --git a/drivers/video/omap2/dss/display-sysfs.c b/drivers/video/omap2/dss/display-sysfs.c
index 18211a9..81d5dc6 100644
--- a/drivers/video/omap2/dss/display-sysfs.c
+++ b/drivers/video/omap2/dss/display-sysfs.c
@@ -33,9 +33,9 @@ static ssize_t display_enabled_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	bool enabled = dssdev->state != OMAP_DSS_DISPLAY_DISABLED;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", enabled);
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			omapdss_device_is_enabled(dssdev));
 }
 
 static ssize_t display_enabled_store(struct device *dev,
@@ -44,20 +44,24 @@ static ssize_t display_enabled_store(struct device *dev,
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
 	int r;
-	bool enabled;
+	bool enable;
 
-	r = strtobool(buf, &enabled);
+	r = strtobool(buf, &enable);
 	if (r)
 		return r;
 
-	if (enabled != (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)) {
-		if (enabled) {
-			r = dssdev->driver->enable(dssdev);
-			if (r)
-				return r;
-		} else {
-			dssdev->driver->disable(dssdev);
-		}
+	if (enable = omapdss_device_is_enabled(dssdev))
+		return size;
+
+	if (omapdss_device_is_connected(dssdev) = false)
+		return -ENODEV;
+
+	if (enable) {
+		r = dssdev->driver->enable(dssdev);
+		if (r)
+			return r;
+	} else {
+		dssdev->driver->disable(dssdev);
 	}
 
 	return size;
diff --git a/drivers/video/omap2/dss/manager-sysfs.c b/drivers/video/omap2/dss/manager-sysfs.c
index 72784b3..de7e7b5 100644
--- a/drivers/video/omap2/dss/manager-sysfs.c
+++ b/drivers/video/omap2/dss/manager-sysfs.c
@@ -50,6 +50,7 @@ static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
 	int r = 0;
 	size_t len = size;
 	struct omap_dss_device *dssdev = NULL;
+	struct omap_dss_device *old_dssdev;
 
 	int match(struct omap_dss_device *dssdev, void *data)
 	{
@@ -66,34 +67,44 @@ static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
 	if (len > 0 && dssdev = NULL)
 		return -EINVAL;
 
-	if (dssdev)
+	if (dssdev) {
 		DSSDBG("display %s found\n", dssdev->name);
 
-	if (mgr->output) {
-		r = mgr->unset_output(mgr);
-		if (r) {
-			DSSERR("failed to unset current output\n");
+		if (omapdss_device_is_connected(dssdev)) {
+			DSSERR("new display is already connected\n");
+			r = -EINVAL;
+			goto put_device;
+		}
+
+		if (omapdss_device_is_enabled(dssdev)) {
+			DSSERR("new display is not disabled\n");
+			r = -EINVAL;
 			goto put_device;
 		}
 	}
 
-	if (dssdev) {
-		struct omap_dss_output *out;
+	old_dssdev = mgr->get_device(mgr);
+	if (old_dssdev) {
+		if (omapdss_device_is_enabled(old_dssdev)) {
+			DSSERR("old display is not disabled\n");
+			r = -EINVAL;
+			goto put_device;
+		}
 
-		out = omapdss_find_output_from_display(dssdev);
+		old_dssdev->driver->disconnect(old_dssdev);
+	}
 
-		/*
-		 * a registered device should have an output connected to it
-		 * already
-		 */
-		if (!out) {
-			DSSERR("device has no output connected to it\n");
+	if (dssdev) {
+		r = dssdev->driver->connect(dssdev);
+		if (r) {
+			DSSERR("failed to connect new device\n");
 			goto put_device;
 		}
 
-		r = mgr->set_output(mgr, out);
-		if (r) {
-			DSSERR("failed to set manager output\n");
+		old_dssdev = mgr->get_device(mgr);
+		if (old_dssdev != dssdev) {
+			DSSERR("failed to connect device to this manager\n");
+			dssdev->driver->disconnect(dssdev);
 			goto put_device;
 		}
 
diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index ab2c0f0..a53b08b 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -179,6 +179,20 @@ void dss_uninstall_mgr_ops(void)
 }
 EXPORT_SYMBOL(dss_uninstall_mgr_ops);
 
+int dss_mgr_connect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	return dss_mgr_ops->connect(mgr, dst);
+}
+EXPORT_SYMBOL(dss_mgr_connect);
+
+void dss_mgr_disconnect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	dss_mgr_ops->disconnect(mgr, dst);
+}
+EXPORT_SYMBOL(dss_mgr_disconnect);
+
 void dss_mgr_set_timings(struct omap_overlay_manager *mgr,
 		const struct omap_video_timings *timings)
 {
diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index dd972c5..eacbafa 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -1853,6 +1853,8 @@ static void omapfb_free_resources(struct omapfb2_device *fbdev)
 		if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
 			dssdev->driver->disable(dssdev);
 
+		dssdev->driver->disconnect(dssdev);
+
 		omap_dss_put_device(dssdev);
 	}
 
@@ -2363,22 +2365,23 @@ static int omapfb_init_connections(struct omapfb2_device *fbdev,
 	int i, r;
 	struct omap_overlay_manager *mgr;
 
+	r = def_dssdev->driver->connect(def_dssdev);
+	if (r) {
+		dev_err(fbdev->dev, "failed to connect default display\n");
+		return r;
+	}
+
 	for (i = 0; i < fbdev->num_displays; ++i) {
 		struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
-		struct omap_dss_output *out;
 
-		out = omapdss_find_output_from_display(dssdev);
-		if (!out)
+		if (dssdev = def_dssdev)
 			continue;
 
-		mgr = omap_dss_get_overlay_manager(out->dispc_channel);
-		if (!mgr)
-			continue;
-
-		if (mgr->output)
-			mgr->unset_output(mgr);
-
-		mgr->set_output(mgr, out);
+		/*
+		 * We don't care if the connect succeeds or not. We just want to
+		 * connect as many displays as possible.
+		 */
+		dssdev->driver->connect(dssdev);
 	}
 
 	mgr = omapdss_find_mgr_from_display(def_dssdev);
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 68b2345..f747266 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -689,6 +689,9 @@ struct omap_dss_driver {
 	int (*probe)(struct omap_dss_device *);
 	void (*remove)(struct omap_dss_device *);
 
+	int (*connect)(struct omap_dss_device *dssdev);
+	void (*disconnect)(struct omap_dss_device *dssdev);
+
 	int (*enable)(struct omap_dss_device *display);
 	void (*disable)(struct omap_dss_device *display);
 	int (*run_test)(struct omap_dss_device *display, int test);
@@ -888,6 +891,11 @@ int omapdss_compat_init(void);
 void omapdss_compat_uninit(void);
 
 struct dss_mgr_ops {
+	int (*connect)(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst);
+	void (*disconnect)(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst);
+
 	void (*start_update)(struct omap_overlay_manager *mgr);
 	int (*enable)(struct omap_overlay_manager *mgr);
 	void (*disable)(struct omap_overlay_manager *mgr);
@@ -904,6 +912,10 @@ struct dss_mgr_ops {
 int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops);
 void dss_uninstall_mgr_ops(void);
 
+int dss_mgr_connect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst);
+void dss_mgr_disconnect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst);
 void dss_mgr_set_timings(struct omap_overlay_manager *mgr,
 		const struct omap_video_timings *timings);
 void dss_mgr_set_lcd_config(struct omap_overlay_manager *mgr,
@@ -915,4 +927,15 @@ int dss_mgr_register_framedone_handler(struct omap_overlay_manager *mgr,
 		void (*handler)(void *), void *data);
 void dss_mgr_unregister_framedone_handler(struct omap_overlay_manager *mgr,
 		void (*handler)(void *), void *data);
+
+static inline bool omapdss_device_is_connected(struct omap_dss_device *dssdev)
+{
+	return dssdev->output;
+}
+
+static inline bool omapdss_device_is_enabled(struct omap_dss_device *dssdev)
+{
+	return dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+}
+
 #endif
-- 
1.8.1.2

[PATCH 12/32] OMAPDSS: Implement display (dis)connect support

[Tomi Valkeinen]

We currently have two steps in panel initialization and startup: probing
and enabling. After the panel has been probed, it's ready and can be
configured and later enabled.

This model is not enough with more complex display pipelines, where we
may have, for example, two panels, of which only one can be used at a
time, connected to the same video output.

To support that kind of scenarios, we need to add new step to the
initialization: connect.

This patch adds support for connecting and disconnecting panels. After
probe, but before connect, no panel ops should be called. When the
connect is called, a proper video pipeline is established, and the panel
is ready for use. If some part in the video pipeline is already
connected (by some other panel), the connect call fails.

One key difference with the old style setup is that connect() handles
also connecting to the overlay manager. This means that the omapfb (or
omapdrm) no longer needs to figure out which overlay manager to use, but
it can just call connect() on the panel, and the proper overlay manager
is connected by omapdss.

This also allows us to add back the support for dynamic switching
between two exclusive panels. However, the current panel device model is
not changed to support this, as the new device model is implemented in
the following patches and the old model will be removed. The new device
model supports dynamic switching.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/gpu/drm/omapdrm/omap_crtc.c      | 24 +++++++++++++++++
 drivers/gpu/drm/omapdrm/omap_drv.c       | 12 ++++++++-
 drivers/video/omap2/dss/apply.c          | 14 ++++++++++
 drivers/video/omap2/dss/core.c           | 44 +++++++++++++++++++++++++++++++
 drivers/video/omap2/dss/display-sysfs.c  | 28 +++++++++++---------
 drivers/video/omap2/dss/manager-sysfs.c  | 45 ++++++++++++++++++++------------
 drivers/video/omap2/dss/output.c         | 14 ++++++++++
 drivers/video/omap2/omapfb/omapfb-main.c | 25 ++++++++++--------
 include/video/omapdss.h                  | 23 ++++++++++++++++
 9 files changed, 188 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 02075bf..b2ab2f5 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -94,6 +94,28 @@ uint32_t pipe2vbl(struct drm_crtc *crtc)
 static struct omap_crtc *omap_crtcs[8];
 
 /* we can probably ignore these until we support command-mode panels: */
+static int omap_crtc_connect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	if (mgr->output)
+		return -EINVAL;
+
+	if ((mgr->supported_outputs & dst->id) == 0)
+		return -EINVAL;
+
+	dst->manager = mgr;
+	mgr->output = dst;
+
+	return 0;
+}
+
+static void omap_crtc_disconnect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	mgr->output->manager = NULL;
+	mgr->output = NULL;
+}
+
 static void omap_crtc_start_update(struct omap_overlay_manager *mgr)
 {
 }
@@ -138,6 +160,8 @@ static void omap_crtc_unregister_framedone_handler(
 }
 
 static const struct dss_mgr_ops mgr_ops = {
+		.connect = omap_crtc_connect,
+		.disconnect = omap_crtc_disconnect,
 		.start_update = omap_crtc_start_update,
 		.enable = omap_crtc_enable,
 		.disable = omap_crtc_disable,
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index f8947f9..58bd259 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -97,6 +97,7 @@ static int omap_modeset_init(struct drm_device *dev)
 	int num_mgrs = dss_feat_get_num_mgrs();
 	int num_crtcs;
 	int i, id = 0;
+	int r;
 
 	omap_crtc_pre_init();
 
@@ -118,6 +119,7 @@ static int omap_modeset_init(struct drm_device *dev)
 		struct drm_connector *connector;
 		struct drm_encoder *encoder;
 		enum omap_channel channel;
+		struct omap_overlay_manager *mgr;
 
 		if (!dssdev->driver) {
 			dev_warn(dev->dev, "%s has no driver.. skipping it\n",
@@ -133,6 +135,13 @@ static int omap_modeset_init(struct drm_device *dev)
 			continue;
 		}
 
+		r = dssdev->driver->connect(dssdev);
+		if (r) {
+			dev_err(dev->dev, "could not connect display: %s\n",
+					dssdev->name);
+			continue;
+		}
+
 		encoder = omap_encoder_init(dev, dssdev);
 
 		if (!encoder) {
@@ -174,8 +183,9 @@ static int omap_modeset_init(struct drm_device *dev)
 		 * other possible channels to which the encoder can connect are
 		 * not considered.
 		 */
-		channel = dssdev->output->dispc_channel;
 
+		mgr = omapdss_find_mgr_from_display(dssdev);
+		channel = mgr->id;
 		/*
 		 * if this channel hasn't already been taken by a previously
 		 * allocated crtc, we create a new crtc for it
diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index c844071..dbd3c2f 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -790,6 +790,18 @@ static void mgr_clear_shadow_dirty(struct omap_overlay_manager *mgr)
 	}
 }
 
+static int dss_mgr_connect_compat(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	return mgr->set_output(mgr, dst);
+}
+
+static void dss_mgr_disconnect_compat(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	mgr->unset_output(mgr);
+}
+
 static void dss_mgr_start_update_compat(struct omap_overlay_manager *mgr)
 {
 	struct mgr_priv_data *mp = get_mgr_priv(mgr);
@@ -1552,6 +1564,8 @@ static void dss_mgr_unregister_framedone_handler_compat(struct omap_overlay_mana
 }
 
 static const struct dss_mgr_ops apply_mgr_ops = {
+	.connect = dss_mgr_connect_compat,
+	.disconnect = dss_mgr_disconnect_compat,
 	.start_update = dss_mgr_start_update_compat,
 	.enable = dss_mgr_enable_compat,
 	.disable = dss_mgr_disable_compat,
diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 502ec1b..4bd8f79 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -371,6 +371,46 @@ static int dss_driver_remove(struct device *dev)
 	return 0;
 }
 
+static int omapdss_default_connect(struct omap_dss_device *dssdev)
+{
+	struct omap_dss_output *out;
+	struct omap_overlay_manager *mgr;
+	int r;
+
+	out = dssdev->output;
+
+	if (out == NULL)
+		return -ENODEV;
+
+	mgr = omap_dss_get_overlay_manager(out->dispc_channel);
+	if (!mgr)
+		return -ENODEV;
+
+	r = dss_mgr_connect(mgr, out);
+	if (r)
+		return r;
+
+	return 0;
+}
+
+static void omapdss_default_disconnect(struct omap_dss_device *dssdev)
+{
+	struct omap_dss_output *out;
+	struct omap_overlay_manager *mgr;
+
+	out = dssdev->output;
+
+	if (out == NULL)
+		return;
+
+	mgr = out->manager;
+
+	if (mgr == NULL)
+		return;
+
+	dss_mgr_disconnect(mgr, out);
+}
+
 int omap_dss_register_driver(struct omap_dss_driver *dssdriver)
 {
 	dssdriver->driver.bus = &dss_bus_type;
@@ -384,6 +424,10 @@ int omap_dss_register_driver(struct omap_dss_driver *dssdriver)
 			omapdss_default_get_recommended_bpp;
 	if (dssdriver->get_timings == NULL)
 		dssdriver->get_timings = omapdss_default_get_timings;
+	if (dssdriver->connect == NULL)
+		dssdriver->connect = omapdss_default_connect;
+	if (dssdriver->disconnect == NULL)
+		dssdriver->disconnect = omapdss_default_disconnect;
 
 	return driver_register(&dssdriver->driver);
 }
diff --git a/drivers/video/omap2/dss/display-sysfs.c b/drivers/video/omap2/dss/display-sysfs.c
index 18211a9..81d5dc6 100644
--- a/drivers/video/omap2/dss/display-sysfs.c
+++ b/drivers/video/omap2/dss/display-sysfs.c
@@ -33,9 +33,9 @@ static ssize_t display_enabled_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	bool enabled = dssdev->state != OMAP_DSS_DISPLAY_DISABLED;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", enabled);
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			omapdss_device_is_enabled(dssdev));
 }
 
 static ssize_t display_enabled_store(struct device *dev,
@@ -44,20 +44,24 @@ static ssize_t display_enabled_store(struct device *dev,
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
 	int r;
-	bool enabled;
+	bool enable;
 
-	r = strtobool(buf, &enabled);
+	r = strtobool(buf, &enable);
 	if (r)
 		return r;
 
-	if (enabled != (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)) {
-		if (enabled) {
-			r = dssdev->driver->enable(dssdev);
-			if (r)
-				return r;
-		} else {
-			dssdev->driver->disable(dssdev);
-		}
+	if (enable == omapdss_device_is_enabled(dssdev))
+		return size;
+
+	if (omapdss_device_is_connected(dssdev) == false)
+		return -ENODEV;
+
+	if (enable) {
+		r = dssdev->driver->enable(dssdev);
+		if (r)
+			return r;
+	} else {
+		dssdev->driver->disable(dssdev);
 	}
 
 	return size;
diff --git a/drivers/video/omap2/dss/manager-sysfs.c b/drivers/video/omap2/dss/manager-sysfs.c
index 72784b3..de7e7b5 100644
--- a/drivers/video/omap2/dss/manager-sysfs.c
+++ b/drivers/video/omap2/dss/manager-sysfs.c
@@ -50,6 +50,7 @@ static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
 	int r = 0;
 	size_t len = size;
 	struct omap_dss_device *dssdev = NULL;
+	struct omap_dss_device *old_dssdev;
 
 	int match(struct omap_dss_device *dssdev, void *data)
 	{
@@ -66,34 +67,44 @@ static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
 	if (len > 0 && dssdev == NULL)
 		return -EINVAL;
 
-	if (dssdev)
+	if (dssdev) {
 		DSSDBG("display %s found\n", dssdev->name);
 
-	if (mgr->output) {
-		r = mgr->unset_output(mgr);
-		if (r) {
-			DSSERR("failed to unset current output\n");
+		if (omapdss_device_is_connected(dssdev)) {
+			DSSERR("new display is already connected\n");
+			r = -EINVAL;
+			goto put_device;
+		}
+
+		if (omapdss_device_is_enabled(dssdev)) {
+			DSSERR("new display is not disabled\n");
+			r = -EINVAL;
 			goto put_device;
 		}
 	}
 
-	if (dssdev) {
-		struct omap_dss_output *out;
+	old_dssdev = mgr->get_device(mgr);
+	if (old_dssdev) {
+		if (omapdss_device_is_enabled(old_dssdev)) {
+			DSSERR("old display is not disabled\n");
+			r = -EINVAL;
+			goto put_device;
+		}
 
-		out = omapdss_find_output_from_display(dssdev);
+		old_dssdev->driver->disconnect(old_dssdev);
+	}
 
-		/*
-		 * a registered device should have an output connected to it
-		 * already
-		 */
-		if (!out) {
-			DSSERR("device has no output connected to it\n");
+	if (dssdev) {
+		r = dssdev->driver->connect(dssdev);
+		if (r) {
+			DSSERR("failed to connect new device\n");
 			goto put_device;
 		}
 
-		r = mgr->set_output(mgr, out);
-		if (r) {
-			DSSERR("failed to set manager output\n");
+		old_dssdev = mgr->get_device(mgr);
+		if (old_dssdev != dssdev) {
+			DSSERR("failed to connect device to this manager\n");
+			dssdev->driver->disconnect(dssdev);
 			goto put_device;
 		}
 
diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index ab2c0f0..a53b08b 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -179,6 +179,20 @@ void dss_uninstall_mgr_ops(void)
 }
 EXPORT_SYMBOL(dss_uninstall_mgr_ops);
 
+int dss_mgr_connect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	return dss_mgr_ops->connect(mgr, dst);
+}
+EXPORT_SYMBOL(dss_mgr_connect);
+
+void dss_mgr_disconnect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst)
+{
+	dss_mgr_ops->disconnect(mgr, dst);
+}
+EXPORT_SYMBOL(dss_mgr_disconnect);
+
 void dss_mgr_set_timings(struct omap_overlay_manager *mgr,
 		const struct omap_video_timings *timings)
 {
diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index dd972c5..eacbafa 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -1853,6 +1853,8 @@ static void omapfb_free_resources(struct omapfb2_device *fbdev)
 		if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
 			dssdev->driver->disable(dssdev);
 
+		dssdev->driver->disconnect(dssdev);
+
 		omap_dss_put_device(dssdev);
 	}
 
@@ -2363,22 +2365,23 @@ static int omapfb_init_connections(struct omapfb2_device *fbdev,
 	int i, r;
 	struct omap_overlay_manager *mgr;
 
+	r = def_dssdev->driver->connect(def_dssdev);
+	if (r) {
+		dev_err(fbdev->dev, "failed to connect default display\n");
+		return r;
+	}
+
 	for (i = 0; i < fbdev->num_displays; ++i) {
 		struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
-		struct omap_dss_output *out;
 
-		out = omapdss_find_output_from_display(dssdev);
-		if (!out)
+		if (dssdev == def_dssdev)
 			continue;
 
-		mgr = omap_dss_get_overlay_manager(out->dispc_channel);
-		if (!mgr)
-			continue;
-
-		if (mgr->output)
-			mgr->unset_output(mgr);
-
-		mgr->set_output(mgr, out);
+		/*
+		 * We don't care if the connect succeeds or not. We just want to
+		 * connect as many displays as possible.
+		 */
+		dssdev->driver->connect(dssdev);
 	}
 
 	mgr = omapdss_find_mgr_from_display(def_dssdev);
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 68b2345..f747266 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -689,6 +689,9 @@ struct omap_dss_driver {
 	int (*probe)(struct omap_dss_device *);
 	void (*remove)(struct omap_dss_device *);
 
+	int (*connect)(struct omap_dss_device *dssdev);
+	void (*disconnect)(struct omap_dss_device *dssdev);
+
 	int (*enable)(struct omap_dss_device *display);
 	void (*disable)(struct omap_dss_device *display);
 	int (*run_test)(struct omap_dss_device *display, int test);
@@ -888,6 +891,11 @@ int omapdss_compat_init(void);
 void omapdss_compat_uninit(void);
 
 struct dss_mgr_ops {
+	int (*connect)(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst);
+	void (*disconnect)(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst);
+
 	void (*start_update)(struct omap_overlay_manager *mgr);
 	int (*enable)(struct omap_overlay_manager *mgr);
 	void (*disable)(struct omap_overlay_manager *mgr);
@@ -904,6 +912,10 @@ struct dss_mgr_ops {
 int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops);
 void dss_uninstall_mgr_ops(void);
 
+int dss_mgr_connect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst);
+void dss_mgr_disconnect(struct omap_overlay_manager *mgr,
+		struct omap_dss_output *dst);
 void dss_mgr_set_timings(struct omap_overlay_manager *mgr,
 		const struct omap_video_timings *timings);
 void dss_mgr_set_lcd_config(struct omap_overlay_manager *mgr,
@@ -915,4 +927,15 @@ int dss_mgr_register_framedone_handler(struct omap_overlay_manager *mgr,
 		void (*handler)(void *), void *data);
 void dss_mgr_unregister_framedone_handler(struct omap_overlay_manager *mgr,
 		void (*handler)(void *), void *data);
+
+static inline bool omapdss_device_is_connected(struct omap_dss_device *dssdev)
+{
+	return dssdev->output;
+}
+
+static inline bool omapdss_device_is_enabled(struct omap_dss_device *dssdev)
+{
+	return dssdev->state == OMAP_DSS_DISPLAY_ACTIVE;
+}
+
 #endif
-- 
1.8.1.2

[PATCH 13/32] OMAPDSS: CORE: use devm_regulator_get

[Tomi Valkeinen]

Use devm_regulator_get() instead of regulator_get() to simplify code.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/core.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 4bd8f79..f64d0ac 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -80,7 +80,7 @@ struct regulator *dss_get_vdds_dsi(void)
 	if (core.vdds_dsi_reg != NULL)
 		return core.vdds_dsi_reg;
 
-	reg = regulator_get(&core.pdev->dev, "vdds_dsi");
+	reg = devm_regulator_get(&core.pdev->dev, "vdds_dsi");
 	if (!IS_ERR(reg))
 		core.vdds_dsi_reg = reg;
 
@@ -94,7 +94,7 @@ struct regulator *dss_get_vdds_sdi(void)
 	if (core.vdds_sdi_reg != NULL)
 		return core.vdds_sdi_reg;
 
-	reg = regulator_get(&core.pdev->dev, "vdds_sdi");
+	reg = devm_regulator_get(&core.pdev->dev, "vdds_sdi");
 	if (!IS_ERR(reg))
 		core.vdds_sdi_reg = reg;
 
@@ -654,16 +654,6 @@ static int __init omap_dss_init(void)
 
 static void __exit omap_dss_exit(void)
 {
-	if (core.vdds_dsi_reg != NULL) {
-		regulator_put(core.vdds_dsi_reg);
-		core.vdds_dsi_reg = NULL;
-	}
-
-	if (core.vdds_sdi_reg != NULL) {
-		regulator_put(core.vdds_sdi_reg);
-		core.vdds_sdi_reg = NULL;
-	}
-
 	omap_dss_unregister_drivers();
 
 	omap_dss_bus_unregister();
-- 
1.8.1.2

[PATCH 13/32] OMAPDSS: CORE: use devm_regulator_get

[Tomi Valkeinen]

Use devm_regulator_get() instead of regulator_get() to simplify code.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/core.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 4bd8f79..f64d0ac 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -80,7 +80,7 @@ struct regulator *dss_get_vdds_dsi(void)
 	if (core.vdds_dsi_reg != NULL)
 		return core.vdds_dsi_reg;
 
-	reg = regulator_get(&core.pdev->dev, "vdds_dsi");
+	reg = devm_regulator_get(&core.pdev->dev, "vdds_dsi");
 	if (!IS_ERR(reg))
 		core.vdds_dsi_reg = reg;
 
@@ -94,7 +94,7 @@ struct regulator *dss_get_vdds_sdi(void)
 	if (core.vdds_sdi_reg != NULL)
 		return core.vdds_sdi_reg;
 
-	reg = regulator_get(&core.pdev->dev, "vdds_sdi");
+	reg = devm_regulator_get(&core.pdev->dev, "vdds_sdi");
 	if (!IS_ERR(reg))
 		core.vdds_sdi_reg = reg;
 
@@ -654,16 +654,6 @@ static int __init omap_dss_init(void)
 
 static void __exit omap_dss_exit(void)
 {
-	if (core.vdds_dsi_reg != NULL) {
-		regulator_put(core.vdds_dsi_reg);
-		core.vdds_dsi_reg = NULL;
-	}
-
-	if (core.vdds_sdi_reg != NULL) {
-		regulator_put(core.vdds_sdi_reg);
-		core.vdds_sdi_reg = NULL;
-	}
-
 	omap_dss_unregister_drivers();
 
 	omap_dss_bus_unregister();
-- 
1.8.1.2

[PATCH 14/32] OMAPDSS: DSI: cleanup regulator init

[Tomi Valkeinen]

Separate the regulator initialization code to its own function, removing
duplicate code.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dsi.c | 82 ++++++++++++++++---------------------------
 1 file changed, 31 insertions(+), 51 deletions(-)

diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index bdddd0d..37ca980 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -1114,6 +1114,30 @@ void dsi_runtime_put(struct platform_device *dsidev)
 	WARN_ON(r < 0 && r != -ENOSYS);
 }
 
+static int dsi_regulator_init(struct platform_device *dsidev)
+{
+	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
+	struct regulator *vdds_dsi;
+
+	if (dsi->vdds_dsi_reg != NULL)
+		return 0;
+
+	vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
+
+	/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
+	if (IS_ERR(vdds_dsi))
+		vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
+
+	if (IS_ERR(vdds_dsi)) {
+		DSSERR("can't get VDDS_DSI regulator\n");
+		return PTR_ERR(vdds_dsi);
+	}
+
+	dsi->vdds_dsi_reg = vdds_dsi;
+
+	return 0;
+}
+
 /* source clock for DSI PLL. this could also be PCLKFREE */
 static inline void dsi_enable_pll_clock(struct platform_device *dsidev,
 		bool enable)
@@ -1592,22 +1616,9 @@ int dsi_pll_init(struct platform_device *dsidev, bool enable_hsclk,
 	 */
 	enable_hsclk = enable_hsdiv = true;
 
-	if (dsi->vdds_dsi_reg = NULL) {
-		struct regulator *vdds_dsi;
-
-		vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
-
-		/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
-		if (IS_ERR(vdds_dsi))
-			vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
-
-		if (IS_ERR(vdds_dsi)) {
-			DSSERR("can't get VDDS_DSI regulator\n");
-			return PTR_ERR(vdds_dsi);
-		}
-
-		dsi->vdds_dsi_reg = vdds_dsi;
-	}
+	r = dsi_regulator_init(dsidev);
+	if (r)
+		return r;
 
 	dsi_enable_pll_clock(dsidev, 1);
 	/*
@@ -5225,34 +5236,6 @@ static enum omap_channel dsi_get_channel(int module_id)
 	}
 }
 
-static int dsi_init_display(struct omap_dss_device *dssdev)
-{
-	struct platform_device *dsidev -			dsi_get_dsidev_from_id(dssdev->phy.dsi.module);
-	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
-
-	DSSDBG("DSI init\n");
-
-	if (dsi->vdds_dsi_reg = NULL) {
-		struct regulator *vdds_dsi;
-
-		vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
-
-		/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
-		if (IS_ERR(vdds_dsi))
-			vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
-
-		if (IS_ERR(vdds_dsi)) {
-			DSSERR("can't get VDDS_DSI regulator\n");
-			return PTR_ERR(vdds_dsi);
-		}
-
-		dsi->vdds_dsi_reg = vdds_dsi;
-	}
-
-	return 0;
-}
-
 int omap_dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
 {
 	struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
@@ -5410,19 +5393,16 @@ static int dsi_probe_pdata(struct platform_device *dsidev)
 	if (!plat_dssdev)
 		return 0;
 
+	r = dsi_regulator_init(dsidev);
+	if (r)
+		return r;
+
 	dssdev = dss_alloc_and_init_device(&dsidev->dev);
 	if (!dssdev)
 		return -ENOMEM;
 
 	dss_copy_device_pdata(dssdev, plat_dssdev);
 
-	r = dsi_init_display(dssdev);
-	if (r) {
-		DSSERR("device %s init failed: %d\n", dssdev->name, r);
-		dss_put_device(dssdev);
-		return r;
-	}
-
 	r = omapdss_output_set_device(&dsi->output, dssdev);
 	if (r) {
 		DSSERR("failed to connect output to new device: %s\n",
-- 
1.8.1.2

[PATCH 14/32] OMAPDSS: DSI: cleanup regulator init

[Tomi Valkeinen]

Separate the regulator initialization code to its own function, removing
duplicate code.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dsi.c | 82 ++++++++++++++++---------------------------
 1 file changed, 31 insertions(+), 51 deletions(-)

diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index bdddd0d..37ca980 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -1114,6 +1114,30 @@ void dsi_runtime_put(struct platform_device *dsidev)
 	WARN_ON(r < 0 && r != -ENOSYS);
 }
 
+static int dsi_regulator_init(struct platform_device *dsidev)
+{
+	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
+	struct regulator *vdds_dsi;
+
+	if (dsi->vdds_dsi_reg != NULL)
+		return 0;
+
+	vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
+
+	/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
+	if (IS_ERR(vdds_dsi))
+		vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
+
+	if (IS_ERR(vdds_dsi)) {
+		DSSERR("can't get VDDS_DSI regulator\n");
+		return PTR_ERR(vdds_dsi);
+	}
+
+	dsi->vdds_dsi_reg = vdds_dsi;
+
+	return 0;
+}
+
 /* source clock for DSI PLL. this could also be PCLKFREE */
 static inline void dsi_enable_pll_clock(struct platform_device *dsidev,
 		bool enable)
@@ -1592,22 +1616,9 @@ int dsi_pll_init(struct platform_device *dsidev, bool enable_hsclk,
 	 */
 	enable_hsclk = enable_hsdiv = true;
 
-	if (dsi->vdds_dsi_reg == NULL) {
-		struct regulator *vdds_dsi;
-
-		vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
-
-		/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
-		if (IS_ERR(vdds_dsi))
-			vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
-
-		if (IS_ERR(vdds_dsi)) {
-			DSSERR("can't get VDDS_DSI regulator\n");
-			return PTR_ERR(vdds_dsi);
-		}
-
-		dsi->vdds_dsi_reg = vdds_dsi;
-	}
+	r = dsi_regulator_init(dsidev);
+	if (r)
+		return r;
 
 	dsi_enable_pll_clock(dsidev, 1);
 	/*
@@ -5225,34 +5236,6 @@ static enum omap_channel dsi_get_channel(int module_id)
 	}
 }
 
-static int dsi_init_display(struct omap_dss_device *dssdev)
-{
-	struct platform_device *dsidev =
-			dsi_get_dsidev_from_id(dssdev->phy.dsi.module);
-	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
-
-	DSSDBG("DSI init\n");
-
-	if (dsi->vdds_dsi_reg == NULL) {
-		struct regulator *vdds_dsi;
-
-		vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
-
-		/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
-		if (IS_ERR(vdds_dsi))
-			vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
-
-		if (IS_ERR(vdds_dsi)) {
-			DSSERR("can't get VDDS_DSI regulator\n");
-			return PTR_ERR(vdds_dsi);
-		}
-
-		dsi->vdds_dsi_reg = vdds_dsi;
-	}
-
-	return 0;
-}
-
 int omap_dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
 {
 	struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
@@ -5410,19 +5393,16 @@ static int dsi_probe_pdata(struct platform_device *dsidev)
 	if (!plat_dssdev)
 		return 0;
 
+	r = dsi_regulator_init(dsidev);
+	if (r)
+		return r;
+
 	dssdev = dss_alloc_and_init_device(&dsidev->dev);
 	if (!dssdev)
 		return -ENOMEM;
 
 	dss_copy_device_pdata(dssdev, plat_dssdev);
 
-	r = dsi_init_display(dssdev);
-	if (r) {
-		DSSERR("device %s init failed: %d\n", dssdev->name, r);
-		dss_put_device(dssdev);
-		return r;
-	}
-
 	r = omapdss_output_set_device(&dsi->output, dssdev);
 	if (r) {
 		DSSERR("failed to connect output to new device: %s\n",
-- 
1.8.1.2

[PATCH 15/32] OMAPDSS: DPI: cleanup pll & regulator init

[Tomi Valkeinen]

Split regulator and DSI PLL init code to their own functions for
clarity.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dpi.c | 100 ++++++++++++++++++++++--------------------
 1 file changed, 53 insertions(+), 47 deletions(-)

diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index 43f6b26..66ba9a6 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -545,6 +545,53 @@ static int dpi_verify_dsi_pll(struct platform_device *dsidev)
 	return 0;
 }
 
+static int dpi_init_regulator(void)
+{
+	struct regulator *vdds_dsi;
+
+	if (!dss_has_feature(FEAT_DPI_USES_VDDS_DSI))
+		return 0;
+
+	if (dpi.vdds_dsi_reg)
+		return 0;
+
+	vdds_dsi = dss_get_vdds_dsi();
+
+	if (!IS_ERR(vdds_dsi)) {
+		dpi.vdds_dsi_from_core = true;
+		dpi.vdds_dsi_reg = vdds_dsi;
+		return 0;
+	}
+
+	vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
+	if (!IS_ERR(vdds_dsi)) {
+		dpi.vdds_dsi_from_core = false;
+		dpi.vdds_dsi_reg = vdds_dsi;
+		return 0;
+	}
+
+	return PTR_ERR(vdds_dsi);
+}
+
+static void dpi_init_pll(void)
+{
+	struct platform_device *dsidev;
+
+	if (dpi.dsidev)
+		return;
+
+	dsidev = dpi_get_dsidev(dpi.output.dispc_channel);
+	if (!dsidev)
+		return;
+
+	if (dpi_verify_dsi_pll(dsidev)) {
+		DSSWARN("DSI PLL not operational\n");
+		return;
+	}
+
+	dpi.dsidev = dsidev;
+}
+
 /*
  * Return a hardcoded channel for the DPI output. This should work for
  * current use cases, but this can be later expanded to either resolve
@@ -575,46 +622,6 @@ static enum omap_channel dpi_get_channel(void)
 	}
 }
 
-static int dpi_init_display(struct omap_dss_device *dssdev)
-{
-	struct platform_device *dsidev;
-
-	DSSDBG("init_display\n");
-
-	if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI) &&
-					dpi.vdds_dsi_reg = NULL) {
-		struct regulator *vdds_dsi;
-
-		vdds_dsi = dss_get_vdds_dsi();
-		if (IS_ERR(vdds_dsi)) {
-			vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
-			if (IS_ERR(vdds_dsi)) {
-				DSSERR("can't get VDDS_DSI regulator\n");
-				return PTR_ERR(vdds_dsi);
-			}
-			dpi.vdds_dsi_from_core = false;
-		} else {
-			dpi.vdds_dsi_from_core = true;
-		}
-
-		dpi.vdds_dsi_reg = vdds_dsi;
-	}
-
-	dsidev = dpi_get_dsidev(dpi.output.dispc_channel);
-
-	if (dsidev && dpi_verify_dsi_pll(dsidev)) {
-		dsidev = NULL;
-		DSSWARN("DSI PLL not operational\n");
-	}
-
-	if (dsidev)
-		DSSDBG("using DSI PLL for DPI clock\n");
-
-	dpi.dsidev = dsidev;
-
-	return 0;
-}
-
 static struct omap_dss_device *dpi_find_dssdev(struct platform_device *pdev)
 {
 	struct omap_dss_board_info *pdata = pdev->dev.platform_data;
@@ -654,19 +661,18 @@ static int dpi_probe_pdata(struct platform_device *dpidev)
 	if (!plat_dssdev)
 		return 0;
 
+	r = dpi_init_regulator();
+	if (r)
+		return r;
+
+	dpi_init_pll();
+
 	dssdev = dss_alloc_and_init_device(&dpidev->dev);
 	if (!dssdev)
 		return -ENOMEM;
 
 	dss_copy_device_pdata(dssdev, plat_dssdev);
 
-	r = dpi_init_display(dssdev);
-	if (r) {
-		DSSERR("device %s init failed: %d\n", dssdev->name, r);
-		dss_put_device(dssdev);
-		return r;
-	}
-
 	r = omapdss_output_set_device(&dpi.output, dssdev);
 	if (r) {
 		DSSERR("failed to connect output to new device: %s\n",
-- 
1.8.1.2

[PATCH 15/32] OMAPDSS: DPI: cleanup pll & regulator init

[Tomi Valkeinen]

Split regulator and DSI PLL init code to their own functions for
clarity.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dpi.c | 100 ++++++++++++++++++++++--------------------
 1 file changed, 53 insertions(+), 47 deletions(-)

diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index 43f6b26..66ba9a6 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -545,6 +545,53 @@ static int dpi_verify_dsi_pll(struct platform_device *dsidev)
 	return 0;
 }
 
+static int dpi_init_regulator(void)
+{
+	struct regulator *vdds_dsi;
+
+	if (!dss_has_feature(FEAT_DPI_USES_VDDS_DSI))
+		return 0;
+
+	if (dpi.vdds_dsi_reg)
+		return 0;
+
+	vdds_dsi = dss_get_vdds_dsi();
+
+	if (!IS_ERR(vdds_dsi)) {
+		dpi.vdds_dsi_from_core = true;
+		dpi.vdds_dsi_reg = vdds_dsi;
+		return 0;
+	}
+
+	vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
+	if (!IS_ERR(vdds_dsi)) {
+		dpi.vdds_dsi_from_core = false;
+		dpi.vdds_dsi_reg = vdds_dsi;
+		return 0;
+	}
+
+	return PTR_ERR(vdds_dsi);
+}
+
+static void dpi_init_pll(void)
+{
+	struct platform_device *dsidev;
+
+	if (dpi.dsidev)
+		return;
+
+	dsidev = dpi_get_dsidev(dpi.output.dispc_channel);
+	if (!dsidev)
+		return;
+
+	if (dpi_verify_dsi_pll(dsidev)) {
+		DSSWARN("DSI PLL not operational\n");
+		return;
+	}
+
+	dpi.dsidev = dsidev;
+}
+
 /*
  * Return a hardcoded channel for the DPI output. This should work for
  * current use cases, but this can be later expanded to either resolve
@@ -575,46 +622,6 @@ static enum omap_channel dpi_get_channel(void)
 	}
 }
 
-static int dpi_init_display(struct omap_dss_device *dssdev)
-{
-	struct platform_device *dsidev;
-
-	DSSDBG("init_display\n");
-
-	if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI) &&
-					dpi.vdds_dsi_reg == NULL) {
-		struct regulator *vdds_dsi;
-
-		vdds_dsi = dss_get_vdds_dsi();
-		if (IS_ERR(vdds_dsi)) {
-			vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
-			if (IS_ERR(vdds_dsi)) {
-				DSSERR("can't get VDDS_DSI regulator\n");
-				return PTR_ERR(vdds_dsi);
-			}
-			dpi.vdds_dsi_from_core = false;
-		} else {
-			dpi.vdds_dsi_from_core = true;
-		}
-
-		dpi.vdds_dsi_reg = vdds_dsi;
-	}
-
-	dsidev = dpi_get_dsidev(dpi.output.dispc_channel);
-
-	if (dsidev && dpi_verify_dsi_pll(dsidev)) {
-		dsidev = NULL;
-		DSSWARN("DSI PLL not operational\n");
-	}
-
-	if (dsidev)
-		DSSDBG("using DSI PLL for DPI clock\n");
-
-	dpi.dsidev = dsidev;
-
-	return 0;
-}
-
 static struct omap_dss_device *dpi_find_dssdev(struct platform_device *pdev)
 {
 	struct omap_dss_board_info *pdata = pdev->dev.platform_data;
@@ -654,19 +661,18 @@ static int dpi_probe_pdata(struct platform_device *dpidev)
 	if (!plat_dssdev)
 		return 0;
 
+	r = dpi_init_regulator();
+	if (r)
+		return r;
+
+	dpi_init_pll();
+
 	dssdev = dss_alloc_and_init_device(&dpidev->dev);
 	if (!dssdev)
 		return -ENOMEM;
 
 	dss_copy_device_pdata(dssdev, plat_dssdev);
 
-	r = dpi_init_display(dssdev);
-	if (r) {
-		DSSERR("device %s init failed: %d\n", dssdev->name, r);
-		dss_put_device(dssdev);
-		return r;
-	}
-
 	r = omapdss_output_set_device(&dpi.output, dssdev);
 	if (r) {
 		DSSERR("failed to connect output to new device: %s\n",
-- 
1.8.1.2

[PATCH 16/32] OMAPDSS: HDMI: add hdmi_init_regulator

[Tomi Valkeinen]

Separate regulator init code into its own function for clarity.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/hdmi.c | 42 ++++++++++++++++++++++++++----------------
 1 file changed, 26 insertions(+), 16 deletions(-)

diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 99f4ab5..960083b 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -328,6 +328,29 @@ static void hdmi_runtime_put(void)
 	WARN_ON(r < 0 && r != -ENOSYS);
 }
 
+static int hdmi_init_regulator(void)
+{
+	struct regulator *reg;
+
+	if (hdmi.vdda_hdmi_dac_reg != NULL)
+		return 0;
+
+	reg = devm_regulator_get(&hdmi.pdev->dev, "vdda_hdmi_dac");
+
+	/* DT HACK: try VDAC to make omapdss work for o4 sdp/panda */
+	if (IS_ERR(reg))
+		reg = devm_regulator_get(&hdmi.pdev->dev, "VDAC");
+
+	if (IS_ERR(reg)) {
+		DSSERR("can't get VDDA_HDMI_DAC regulator\n");
+		return PTR_ERR(reg);
+	}
+
+	hdmi.vdda_hdmi_dac_reg = reg;
+
+	return 0;
+}
+
 static int hdmi_init_display(struct omap_dss_device *dssdev)
 {
 	int r;
@@ -342,22 +365,9 @@ static int hdmi_init_display(struct omap_dss_device *dssdev)
 
 	dss_init_hdmi_ip_ops(&hdmi.ip_data, omapdss_get_version());
 
-	if (hdmi.vdda_hdmi_dac_reg = NULL) {
-		struct regulator *reg;
-
-		reg = devm_regulator_get(&hdmi.pdev->dev, "vdda_hdmi_dac");
-
-		/* DT HACK: try VDAC to make omapdss work for o4 sdp/panda */
-		if (IS_ERR(reg))
-			reg = devm_regulator_get(&hdmi.pdev->dev, "VDAC");
-
-		if (IS_ERR(reg)) {
-			DSSERR("can't get VDDA_HDMI_DAC regulator\n");
-			return PTR_ERR(reg);
-		}
-
-		hdmi.vdda_hdmi_dac_reg = reg;
-	}
+	r = hdmi_init_regulator();
+	if (r)
+		return r;
 
 	r = gpio_request_array(gpios, ARRAY_SIZE(gpios));
 	if (r)
-- 
1.8.1.2

[PATCH 16/32] OMAPDSS: HDMI: add hdmi_init_regulator

[Tomi Valkeinen]

Separate regulator init code into its own function for clarity.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/hdmi.c | 42 ++++++++++++++++++++++++++----------------
 1 file changed, 26 insertions(+), 16 deletions(-)

diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 99f4ab5..960083b 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -328,6 +328,29 @@ static void hdmi_runtime_put(void)
 	WARN_ON(r < 0 && r != -ENOSYS);
 }
 
+static int hdmi_init_regulator(void)
+{
+	struct regulator *reg;
+
+	if (hdmi.vdda_hdmi_dac_reg != NULL)
+		return 0;
+
+	reg = devm_regulator_get(&hdmi.pdev->dev, "vdda_hdmi_dac");
+
+	/* DT HACK: try VDAC to make omapdss work for o4 sdp/panda */
+	if (IS_ERR(reg))
+		reg = devm_regulator_get(&hdmi.pdev->dev, "VDAC");
+
+	if (IS_ERR(reg)) {
+		DSSERR("can't get VDDA_HDMI_DAC regulator\n");
+		return PTR_ERR(reg);
+	}
+
+	hdmi.vdda_hdmi_dac_reg = reg;
+
+	return 0;
+}
+
 static int hdmi_init_display(struct omap_dss_device *dssdev)
 {
 	int r;
@@ -342,22 +365,9 @@ static int hdmi_init_display(struct omap_dss_device *dssdev)
 
 	dss_init_hdmi_ip_ops(&hdmi.ip_data, omapdss_get_version());
 
-	if (hdmi.vdda_hdmi_dac_reg == NULL) {
-		struct regulator *reg;
-
-		reg = devm_regulator_get(&hdmi.pdev->dev, "vdda_hdmi_dac");
-
-		/* DT HACK: try VDAC to make omapdss work for o4 sdp/panda */
-		if (IS_ERR(reg))
-			reg = devm_regulator_get(&hdmi.pdev->dev, "VDAC");
-
-		if (IS_ERR(reg)) {
-			DSSERR("can't get VDDA_HDMI_DAC regulator\n");
-			return PTR_ERR(reg);
-		}
-
-		hdmi.vdda_hdmi_dac_reg = reg;
-	}
+	r = hdmi_init_regulator();
+	if (r)
+		return r;
 
 	r = gpio_request_array(gpios, ARRAY_SIZE(gpios));
 	if (r)
-- 
1.8.1.2

[PATCH 17/32] OMAPDSS: SDI: clean up regulator init

[Tomi Valkeinen]

Clean up the SDI driver's regulator init to remove the (unused)
omap_dss_device parameter, renaming the function to a more sensible
name, and making the code slightly clearer.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/sdi.c | 41 +++++++++++++++++++++--------------------
 1 file changed, 21 insertions(+), 20 deletions(-)

diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 2e3afb8..9801a6e 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -251,30 +251,31 @@ void omapdss_sdi_set_datapairs(struct omap_dss_device *dssdev, int datapairs)
 }
 EXPORT_SYMBOL(omapdss_sdi_set_datapairs);
 
-static int sdi_init_display(struct omap_dss_device *dssdev)
+static int sdi_init_regulator(void)
 {
-	DSSDBG("SDI init\n");
-
-	if (sdi.vdds_sdi_reg = NULL) {
-		struct regulator *vdds_sdi;
-
-		vdds_sdi = dss_get_vdds_sdi();
-
-		if (IS_ERR(vdds_sdi)) {
-			vdds_sdi = regulator_get(&sdi.pdev->dev, "vdds_sdi");
-			if (IS_ERR(vdds_sdi)) {
-				DSSERR("can't get VDDS_SDI regulator\n");
-				return PTR_ERR(vdds_sdi);
-			}
-			sdi.vdds_sdi_from_core = false;
-		} else {
-			sdi.vdds_sdi_from_core = true;
-		}
+	struct regulator *vdds_sdi;
+
+	if (sdi.vdds_sdi_reg != NULL)
+		return 0;
 
+	vdds_sdi = dss_get_vdds_sdi();
+
+	if (!IS_ERR(vdds_sdi)) {
+		sdi.vdds_sdi_from_core = true;
 		sdi.vdds_sdi_reg = vdds_sdi;
+		return 0;
 	}
 
-	return 0;
+	vdds_sdi = regulator_get(&sdi.pdev->dev, "vdds_sdi");
+
+	if (!IS_ERR(vdds_sdi)) {
+		sdi.vdds_sdi_from_core = false;
+		sdi.vdds_sdi_reg = vdds_sdi;
+	}
+
+	DSSERR("can't get VDDS_SDI regulator\n");
+
+	return PTR_ERR(vdds_sdi);
 }
 
 static struct omap_dss_device *sdi_find_dssdev(struct platform_device *pdev)
@@ -322,7 +323,7 @@ static int sdi_probe_pdata(struct platform_device *sdidev)
 
 	dss_copy_device_pdata(dssdev, plat_dssdev);
 
-	r = sdi_init_display(dssdev);
+	r = sdi_init_regulator();
 	if (r) {
 		DSSERR("device %s init failed: %d\n", dssdev->name, r);
 		dss_put_device(dssdev);
-- 
1.8.1.2

[PATCH 17/32] OMAPDSS: SDI: clean up regulator init

[Tomi Valkeinen]

Clean up the SDI driver's regulator init to remove the (unused)
omap_dss_device parameter, renaming the function to a more sensible
name, and making the code slightly clearer.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/sdi.c | 41 +++++++++++++++++++++--------------------
 1 file changed, 21 insertions(+), 20 deletions(-)

diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 2e3afb8..9801a6e 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -251,30 +251,31 @@ void omapdss_sdi_set_datapairs(struct omap_dss_device *dssdev, int datapairs)
 }
 EXPORT_SYMBOL(omapdss_sdi_set_datapairs);
 
-static int sdi_init_display(struct omap_dss_device *dssdev)
+static int sdi_init_regulator(void)
 {
-	DSSDBG("SDI init\n");
-
-	if (sdi.vdds_sdi_reg == NULL) {
-		struct regulator *vdds_sdi;
-
-		vdds_sdi = dss_get_vdds_sdi();
-
-		if (IS_ERR(vdds_sdi)) {
-			vdds_sdi = regulator_get(&sdi.pdev->dev, "vdds_sdi");
-			if (IS_ERR(vdds_sdi)) {
-				DSSERR("can't get VDDS_SDI regulator\n");
-				return PTR_ERR(vdds_sdi);
-			}
-			sdi.vdds_sdi_from_core = false;
-		} else {
-			sdi.vdds_sdi_from_core = true;
-		}
+	struct regulator *vdds_sdi;
+
+	if (sdi.vdds_sdi_reg != NULL)
+		return 0;
 
+	vdds_sdi = dss_get_vdds_sdi();
+
+	if (!IS_ERR(vdds_sdi)) {
+		sdi.vdds_sdi_from_core = true;
 		sdi.vdds_sdi_reg = vdds_sdi;
+		return 0;
 	}
 
-	return 0;
+	vdds_sdi = regulator_get(&sdi.pdev->dev, "vdds_sdi");
+
+	if (!IS_ERR(vdds_sdi)) {
+		sdi.vdds_sdi_from_core = false;
+		sdi.vdds_sdi_reg = vdds_sdi;
+	}
+
+	DSSERR("can't get VDDS_SDI regulator\n");
+
+	return PTR_ERR(vdds_sdi);
 }
 
 static struct omap_dss_device *sdi_find_dssdev(struct platform_device *pdev)
@@ -322,7 +323,7 @@ static int sdi_probe_pdata(struct platform_device *sdidev)
 
 	dss_copy_device_pdata(dssdev, plat_dssdev);
 
-	r = sdi_init_display(dssdev);
+	r = sdi_init_regulator();
 	if (r) {
 		DSSERR("device %s init failed: %d\n", dssdev->name, r);
 		dss_put_device(dssdev);
-- 
1.8.1.2

[PATCH 18/32] OMAPDSS: VENC: clean up regulator init

[Tomi Valkeinen]

Clean up the VENC driver's regulator init to remove the (unused)
omap_dss_device parameter, renaming the function to a more sensible
name, and making the code slightly clearer.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/venc.c | 32 ++++++++++++++------------------
 1 file changed, 14 insertions(+), 18 deletions(-)

diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index 7b2e3ae..f484b9f 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -633,23 +633,22 @@ void omapdss_venc_invert_vid_out_polarity(struct omap_dss_device *dssdev,
 	mutex_unlock(&venc.venc_lock);
 }
 
-static int venc_init_display(struct omap_dss_device *dssdev)
+static int venc_init_regulator(void)
 {
-	DSSDBG("init_display\n");
+	struct regulator *vdda_dac;
 
-	if (venc.vdda_dac_reg = NULL) {
-		struct regulator *vdda_dac;
-
-		vdda_dac = regulator_get(&venc.pdev->dev, "vdda_dac");
+	if (venc.vdda_dac_reg != NULL)
+		return 0;
 
-		if (IS_ERR(vdda_dac)) {
-			DSSERR("can't get VDDA_DAC regulator\n");
-			return PTR_ERR(vdda_dac);
-		}
+	vdda_dac = regulator_get(&venc.pdev->dev, "vdda_dac");
 
-		venc.vdda_dac_reg = vdda_dac;
+	if (IS_ERR(vdda_dac)) {
+		DSSERR("can't get VDDA_DAC regulator\n");
+		return PTR_ERR(vdda_dac);
 	}
 
+	venc.vdda_dac_reg = vdda_dac;
+
 	return 0;
 }
 
@@ -765,19 +764,16 @@ static int venc_probe_pdata(struct platform_device *vencdev)
 	if (!plat_dssdev)
 		return 0;
 
+	r = venc_init_regulator();
+	if (r)
+		return r;
+
 	dssdev = dss_alloc_and_init_device(&vencdev->dev);
 	if (!dssdev)
 		return -ENOMEM;
 
 	dss_copy_device_pdata(dssdev, plat_dssdev);
 
-	r = venc_init_display(dssdev);
-	if (r) {
-		DSSERR("device %s init failed: %d\n", dssdev->name, r);
-		dss_put_device(dssdev);
-		return r;
-	}
-
 	r = omapdss_output_set_device(&venc.output, dssdev);
 	if (r) {
 		DSSERR("failed to connect output to new device: %s\n",
-- 
1.8.1.2

[PATCH 18/32] OMAPDSS: VENC: clean up regulator init

[Tomi Valkeinen]

Clean up the VENC driver's regulator init to remove the (unused)
omap_dss_device parameter, renaming the function to a more sensible
name, and making the code slightly clearer.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/venc.c | 32 ++++++++++++++------------------
 1 file changed, 14 insertions(+), 18 deletions(-)

diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index 7b2e3ae..f484b9f 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -633,23 +633,22 @@ void omapdss_venc_invert_vid_out_polarity(struct omap_dss_device *dssdev,
 	mutex_unlock(&venc.venc_lock);
 }
 
-static int venc_init_display(struct omap_dss_device *dssdev)
+static int venc_init_regulator(void)
 {
-	DSSDBG("init_display\n");
+	struct regulator *vdda_dac;
 
-	if (venc.vdda_dac_reg == NULL) {
-		struct regulator *vdda_dac;
-
-		vdda_dac = regulator_get(&venc.pdev->dev, "vdda_dac");
+	if (venc.vdda_dac_reg != NULL)
+		return 0;
 
-		if (IS_ERR(vdda_dac)) {
-			DSSERR("can't get VDDA_DAC regulator\n");
-			return PTR_ERR(vdda_dac);
-		}
+	vdda_dac = regulator_get(&venc.pdev->dev, "vdda_dac");
 
-		venc.vdda_dac_reg = vdda_dac;
+	if (IS_ERR(vdda_dac)) {
+		DSSERR("can't get VDDA_DAC regulator\n");
+		return PTR_ERR(vdda_dac);
 	}
 
+	venc.vdda_dac_reg = vdda_dac;
+
 	return 0;
 }
 
@@ -765,19 +764,16 @@ static int venc_probe_pdata(struct platform_device *vencdev)
 	if (!plat_dssdev)
 		return 0;
 
+	r = venc_init_regulator();
+	if (r)
+		return r;
+
 	dssdev = dss_alloc_and_init_device(&vencdev->dev);
 	if (!dssdev)
 		return -ENOMEM;
 
 	dss_copy_device_pdata(dssdev, plat_dssdev);
 
-	r = venc_init_display(dssdev);
-	if (r) {
-		DSSERR("device %s init failed: %d\n", dssdev->name, r);
-		dss_put_device(dssdev);
-		return r;
-	}
-
 	r = omapdss_output_set_device(&venc.output, dssdev);
 	if (r) {
 		DSSERR("failed to connect output to new device: %s\n",
-- 
1.8.1.2

[PATCH 19/32] OMAPDSS: add videomode conversion support

[Tomi Valkeinen]

Add helper functions to convert between omapdss specific video timings
and the common videomode.

Eventually omapdss will be changed to use only the common video timings,
and these helper functions will make the transition easier.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/Kconfig   |  1 +
 drivers/video/omap2/dss/display.c | 69 +++++++++++++++++++++++++++++++++++++++
 include/video/omapdss.h           |  7 ++++
 3 files changed, 77 insertions(+)

diff --git a/drivers/video/omap2/dss/Kconfig b/drivers/video/omap2/dss/Kconfig
index cb0f145..8f70a83 100644
--- a/drivers/video/omap2/dss/Kconfig
+++ b/drivers/video/omap2/dss/Kconfig
@@ -1,5 +1,6 @@
 menuconfig OMAP2_DSS
         tristate "OMAP2+ Display Subsystem support"
+	select VIDEOMODE_HELPERS
         help
 	  OMAP2+ Display Subsystem support.
 
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 0aa8ad8..72ac058 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -219,3 +219,72 @@ void omap_dss_stop_device(struct omap_dss_device *dssdev)
 }
 EXPORT_SYMBOL(omap_dss_stop_device);
 
+void videomode_to_omap_video_timings(const struct videomode *vm,
+		struct omap_video_timings *ovt)
+{
+	memset(ovt, 0, sizeof(*ovt));
+
+	ovt->pixel_clock = vm->pixelclock / 1000;
+	ovt->x_res = vm->hactive;
+	ovt->hbp = vm->hback_porch;
+	ovt->hfp = vm->hfront_porch;
+	ovt->hsw = vm->hsync_len;
+	ovt->y_res = vm->vactive;
+	ovt->vbp = vm->vback_porch;
+	ovt->vfp = vm->vfront_porch;
+	ovt->vsw = vm->vsync_len;
+
+	ovt->vsync_level = vm->flags & DISPLAY_FLAGS_VSYNC_HIGH ?
+		OMAPDSS_SIG_ACTIVE_HIGH :
+		OMAPDSS_SIG_ACTIVE_LOW;
+	ovt->hsync_level = vm->flags & DISPLAY_FLAGS_HSYNC_HIGH ?
+		OMAPDSS_SIG_ACTIVE_HIGH :
+		OMAPDSS_SIG_ACTIVE_LOW;
+	ovt->de_level = vm->flags & DISPLAY_FLAGS_DE_HIGH ?
+		OMAPDSS_SIG_ACTIVE_HIGH :
+		OMAPDSS_SIG_ACTIVE_HIGH;
+	ovt->data_pclk_edge = vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE ?
+		OMAPDSS_DRIVE_SIG_RISING_EDGE :
+		OMAPDSS_DRIVE_SIG_FALLING_EDGE;
+
+	ovt->sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
+}
+EXPORT_SYMBOL(videomode_to_omap_video_timings);
+
+void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
+		struct videomode *vm)
+{
+	memset(vm, 0, sizeof(*vm));
+
+	vm->pixelclock = ovt->pixel_clock * 1000;
+
+	vm->hactive = ovt->x_res;
+	vm->hback_porch = ovt->hbp;
+	vm->hfront_porch = ovt->hfp;
+	vm->hsync_len = ovt->hsw;
+	vm->vactive = ovt->y_res;
+	vm->vback_porch = ovt->vbp;
+	vm->vfront_porch = ovt->vfp;
+	vm->vsync_len = ovt->vsw;
+
+	if (ovt->hsync_level = OMAPDSS_SIG_ACTIVE_HIGH)
+		vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
+	else
+		vm->flags |= DISPLAY_FLAGS_HSYNC_LOW;
+
+	if (ovt->vsync_level = OMAPDSS_SIG_ACTIVE_HIGH)
+		vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
+	else
+		vm->flags |= DISPLAY_FLAGS_VSYNC_LOW;
+
+	if (ovt->de_level = OMAPDSS_SIG_ACTIVE_HIGH)
+		vm->flags |= DISPLAY_FLAGS_DE_HIGH;
+	else
+		vm->flags |= DISPLAY_FLAGS_DE_LOW;
+
+	if (ovt->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE)
+		vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
+	else
+		vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
+}
+EXPORT_SYMBOL(omap_video_timings_to_videomode);
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index f747266..6c422f7 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -23,6 +23,8 @@
 #include <linux/device.h>
 #include <linux/interrupt.h>
 
+#include <video/videomode.h>
+
 #define DISPC_IRQ_FRAMEDONE		(1 << 0)
 #define DISPC_IRQ_VSYNC			(1 << 1)
 #define DISPC_IRQ_EVSYNC_EVEN		(1 << 2)
@@ -767,6 +769,11 @@ const char *omapdss_get_default_display_name(void);
 int omap_dss_start_device(struct omap_dss_device *dssdev);
 void omap_dss_stop_device(struct omap_dss_device *dssdev);
 
+void videomode_to_omap_video_timings(const struct videomode *vm,
+		struct omap_video_timings *ovt);
+void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
+		struct videomode *vm);
+
 int dss_feat_get_num_mgrs(void);
 int dss_feat_get_num_ovls(void);
 enum omap_display_type dss_feat_get_supported_displays(enum omap_channel channel);
-- 
1.8.1.2

[PATCH 19/32] OMAPDSS: add videomode conversion support

[Tomi Valkeinen]

Add helper functions to convert between omapdss specific video timings
and the common videomode.

Eventually omapdss will be changed to use only the common video timings,
and these helper functions will make the transition easier.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/Kconfig   |  1 +
 drivers/video/omap2/dss/display.c | 69 +++++++++++++++++++++++++++++++++++++++
 include/video/omapdss.h           |  7 ++++
 3 files changed, 77 insertions(+)

diff --git a/drivers/video/omap2/dss/Kconfig b/drivers/video/omap2/dss/Kconfig
index cb0f145..8f70a83 100644
--- a/drivers/video/omap2/dss/Kconfig
+++ b/drivers/video/omap2/dss/Kconfig
@@ -1,5 +1,6 @@
 menuconfig OMAP2_DSS
         tristate "OMAP2+ Display Subsystem support"
+	select VIDEOMODE_HELPERS
         help
 	  OMAP2+ Display Subsystem support.
 
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 0aa8ad8..72ac058 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -219,3 +219,72 @@ void omap_dss_stop_device(struct omap_dss_device *dssdev)
 }
 EXPORT_SYMBOL(omap_dss_stop_device);
 
+void videomode_to_omap_video_timings(const struct videomode *vm,
+		struct omap_video_timings *ovt)
+{
+	memset(ovt, 0, sizeof(*ovt));
+
+	ovt->pixel_clock = vm->pixelclock / 1000;
+	ovt->x_res = vm->hactive;
+	ovt->hbp = vm->hback_porch;
+	ovt->hfp = vm->hfront_porch;
+	ovt->hsw = vm->hsync_len;
+	ovt->y_res = vm->vactive;
+	ovt->vbp = vm->vback_porch;
+	ovt->vfp = vm->vfront_porch;
+	ovt->vsw = vm->vsync_len;
+
+	ovt->vsync_level = vm->flags & DISPLAY_FLAGS_VSYNC_HIGH ?
+		OMAPDSS_SIG_ACTIVE_HIGH :
+		OMAPDSS_SIG_ACTIVE_LOW;
+	ovt->hsync_level = vm->flags & DISPLAY_FLAGS_HSYNC_HIGH ?
+		OMAPDSS_SIG_ACTIVE_HIGH :
+		OMAPDSS_SIG_ACTIVE_LOW;
+	ovt->de_level = vm->flags & DISPLAY_FLAGS_DE_HIGH ?
+		OMAPDSS_SIG_ACTIVE_HIGH :
+		OMAPDSS_SIG_ACTIVE_HIGH;
+	ovt->data_pclk_edge = vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE ?
+		OMAPDSS_DRIVE_SIG_RISING_EDGE :
+		OMAPDSS_DRIVE_SIG_FALLING_EDGE;
+
+	ovt->sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
+}
+EXPORT_SYMBOL(videomode_to_omap_video_timings);
+
+void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
+		struct videomode *vm)
+{
+	memset(vm, 0, sizeof(*vm));
+
+	vm->pixelclock = ovt->pixel_clock * 1000;
+
+	vm->hactive = ovt->x_res;
+	vm->hback_porch = ovt->hbp;
+	vm->hfront_porch = ovt->hfp;
+	vm->hsync_len = ovt->hsw;
+	vm->vactive = ovt->y_res;
+	vm->vback_porch = ovt->vbp;
+	vm->vfront_porch = ovt->vfp;
+	vm->vsync_len = ovt->vsw;
+
+	if (ovt->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
+		vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
+	else
+		vm->flags |= DISPLAY_FLAGS_HSYNC_LOW;
+
+	if (ovt->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
+		vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
+	else
+		vm->flags |= DISPLAY_FLAGS_VSYNC_LOW;
+
+	if (ovt->de_level == OMAPDSS_SIG_ACTIVE_HIGH)
+		vm->flags |= DISPLAY_FLAGS_DE_HIGH;
+	else
+		vm->flags |= DISPLAY_FLAGS_DE_LOW;
+
+	if (ovt->data_pclk_edge == OMAPDSS_DRIVE_SIG_RISING_EDGE)
+		vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
+	else
+		vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
+}
+EXPORT_SYMBOL(omap_video_timings_to_videomode);
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index f747266..6c422f7 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -23,6 +23,8 @@
 #include <linux/device.h>
 #include <linux/interrupt.h>
 
+#include <video/videomode.h>
+
 #define DISPC_IRQ_FRAMEDONE		(1 << 0)
 #define DISPC_IRQ_VSYNC			(1 << 1)
 #define DISPC_IRQ_EVSYNC_EVEN		(1 << 2)
@@ -767,6 +769,11 @@ const char *omapdss_get_default_display_name(void);
 int omap_dss_start_device(struct omap_dss_device *dssdev);
 void omap_dss_stop_device(struct omap_dss_device *dssdev);
 
+void videomode_to_omap_video_timings(const struct videomode *vm,
+		struct omap_video_timings *ovt);
+void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
+		struct videomode *vm);
+
 int dss_feat_get_num_mgrs(void);
 int dss_feat_get_num_ovls(void);
 enum omap_display_type dss_feat_get_supported_displays(enum omap_channel channel);
-- 
1.8.1.2

[PATCH 20/32] OMAPDSS: remove dssdev uses in trivial cases

[Tomi Valkeinen]

In the future the "dssdev" parameter passed to output drivers will
change its meaning. Instead of being a pointer to the panel device, it's
a pointer to the output instance.

To make the transition easier, some of the uses for this dssdev
parameter can be easily removed.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/hdmi.c | 6 +++---
 drivers/video/omap2/dss/rfbi.c | 8 ++++----
 drivers/video/omap2/dss/sdi.c  | 6 +++---
 drivers/video/omap2/dss/venc.c | 6 +++---
 4 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 960083b..6d1e97c 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -560,7 +560,7 @@ static int hdmi_power_on_full(struct omap_dss_device *dssdev)
 {
 	int r;
 	struct omap_video_timings *p;
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = hdmi.output.manager;
 	unsigned long phy;
 
 	r = hdmi_power_on_core(dssdev);
@@ -623,7 +623,7 @@ err_pll_enable:
 
 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = hdmi.output.manager;
 
 	dss_mgr_disable(mgr);
 
@@ -720,7 +720,7 @@ bool omapdss_hdmi_detect(void)
 
 int omapdss_hdmi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = dssdev->output;
+	struct omap_dss_output *out = &hdmi.output;
 	int r = 0;
 
 	DSSDBG("ENTER hdmi_display_enable\n");
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index 1ff221e..cfcb52f 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -312,7 +312,7 @@ static int rfbi_transfer_area(struct omap_dss_device *dssdev,
 {
 	u32 l;
 	int r;
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = rfbi.output.manager;
 	u16 width = rfbi.timings.x_res;
 	u16 height = rfbi.timings.y_res;
 
@@ -852,7 +852,7 @@ static void rfbi_dump_regs(struct seq_file *s)
 
 static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = rfbi.output.manager;
 	struct dss_lcd_mgr_config mgr_config;
 
 	mgr_config.io_pad_mode = DSS_IO_PAD_MODE_RFBI;
@@ -890,7 +890,7 @@ static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 
 int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = dssdev->output;
+	struct omap_dss_output *out = &rfbi.output;
 	int r;
 
 	if (out = NULL || out->manager = NULL) {
@@ -933,7 +933,7 @@ EXPORT_SYMBOL(omapdss_rfbi_display_enable);
 
 void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = dssdev->output;
+	struct omap_dss_output *out = &rfbi.output;
 
 	dss_mgr_unregister_framedone_handler(out->manager,
 			framedone_callback, NULL);
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 9801a6e..e723687 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -112,7 +112,7 @@ static int sdi_calc_clock_div(unsigned long pclk,
 
 static void sdi_config_lcd_manager(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = sdi.output.manager;
 
 	sdi.mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS;
 
@@ -127,7 +127,7 @@ static void sdi_config_lcd_manager(struct omap_dss_device *dssdev)
 
 int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = dssdev->output;
+	struct omap_dss_output *out = &sdi.output;
 	struct omap_video_timings *t = &sdi.timings;
 	struct dss_clock_info dss_cinfo;
 	struct dispc_clock_info dispc_cinfo;
@@ -224,7 +224,7 @@ EXPORT_SYMBOL(omapdss_sdi_display_enable);
 
 void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = sdi.output.manager;
 
 	dss_mgr_disable(mgr);
 
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index f484b9f..af404b4 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -429,7 +429,7 @@ static const struct venc_config *venc_timings_to_config(
 
 static int venc_power_on(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = venc.output.manager;
 	u32 l;
 	int r;
 
@@ -480,7 +480,7 @@ err0:
 
 static void venc_power_off(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = venc.output.manager;
 
 	venc_write_reg(VENC_OUTPUT_CONTROL, 0);
 	dss_set_dac_pwrdn_bgz(0);
@@ -500,7 +500,7 @@ unsigned long venc_get_pixel_clock(void)
 
 int omapdss_venc_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = dssdev->output;
+	struct omap_dss_output *out = &venc.output;
 	int r;
 
 	DSSDBG("venc_display_enable\n");
-- 
1.8.1.2

[PATCH 20/32] OMAPDSS: remove dssdev uses in trivial cases

[Tomi Valkeinen]

In the future the "dssdev" parameter passed to output drivers will
change its meaning. Instead of being a pointer to the panel device, it's
a pointer to the output instance.

To make the transition easier, some of the uses for this dssdev
parameter can be easily removed.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/hdmi.c | 6 +++---
 drivers/video/omap2/dss/rfbi.c | 8 ++++----
 drivers/video/omap2/dss/sdi.c  | 6 +++---
 drivers/video/omap2/dss/venc.c | 6 +++---
 4 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 960083b..6d1e97c 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -560,7 +560,7 @@ static int hdmi_power_on_full(struct omap_dss_device *dssdev)
 {
 	int r;
 	struct omap_video_timings *p;
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = hdmi.output.manager;
 	unsigned long phy;
 
 	r = hdmi_power_on_core(dssdev);
@@ -623,7 +623,7 @@ err_pll_enable:
 
 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = hdmi.output.manager;
 
 	dss_mgr_disable(mgr);
 
@@ -720,7 +720,7 @@ bool omapdss_hdmi_detect(void)
 
 int omapdss_hdmi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = dssdev->output;
+	struct omap_dss_output *out = &hdmi.output;
 	int r = 0;
 
 	DSSDBG("ENTER hdmi_display_enable\n");
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index 1ff221e..cfcb52f 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -312,7 +312,7 @@ static int rfbi_transfer_area(struct omap_dss_device *dssdev,
 {
 	u32 l;
 	int r;
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = rfbi.output.manager;
 	u16 width = rfbi.timings.x_res;
 	u16 height = rfbi.timings.y_res;
 
@@ -852,7 +852,7 @@ static void rfbi_dump_regs(struct seq_file *s)
 
 static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = rfbi.output.manager;
 	struct dss_lcd_mgr_config mgr_config;
 
 	mgr_config.io_pad_mode = DSS_IO_PAD_MODE_RFBI;
@@ -890,7 +890,7 @@ static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 
 int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = dssdev->output;
+	struct omap_dss_output *out = &rfbi.output;
 	int r;
 
 	if (out == NULL || out->manager == NULL) {
@@ -933,7 +933,7 @@ EXPORT_SYMBOL(omapdss_rfbi_display_enable);
 
 void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = dssdev->output;
+	struct omap_dss_output *out = &rfbi.output;
 
 	dss_mgr_unregister_framedone_handler(out->manager,
 			framedone_callback, NULL);
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 9801a6e..e723687 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -112,7 +112,7 @@ static int sdi_calc_clock_div(unsigned long pclk,
 
 static void sdi_config_lcd_manager(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = sdi.output.manager;
 
 	sdi.mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS;
 
@@ -127,7 +127,7 @@ static void sdi_config_lcd_manager(struct omap_dss_device *dssdev)
 
 int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = dssdev->output;
+	struct omap_dss_output *out = &sdi.output;
 	struct omap_video_timings *t = &sdi.timings;
 	struct dss_clock_info dss_cinfo;
 	struct dispc_clock_info dispc_cinfo;
@@ -224,7 +224,7 @@ EXPORT_SYMBOL(omapdss_sdi_display_enable);
 
 void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = sdi.output.manager;
 
 	dss_mgr_disable(mgr);
 
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index f484b9f..af404b4 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -429,7 +429,7 @@ static const struct venc_config *venc_timings_to_config(
 
 static int venc_power_on(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = venc.output.manager;
 	u32 l;
 	int r;
 
@@ -480,7 +480,7 @@ err0:
 
 static void venc_power_off(struct omap_dss_device *dssdev)
 {
-	struct omap_overlay_manager *mgr = dssdev->output->manager;
+	struct omap_overlay_manager *mgr = venc.output.manager;
 
 	venc_write_reg(VENC_OUTPUT_CONTROL, 0);
 	dss_set_dac_pwrdn_bgz(0);
@@ -500,7 +500,7 @@ unsigned long venc_get_pixel_clock(void)
 
 int omapdss_venc_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = dssdev->output;
+	struct omap_dss_output *out = &venc.output;
 	int r;
 
 	DSSDBG("venc_display_enable\n");
-- 
1.8.1.2

[PATCH 21/32] OMAPDSS: add panel list

[Tomi Valkeinen]

We currently use the omapdss bus (which contains all the available
displays) to iterate the displays. As the omapdss bus is on its way out,
this needs to be changed.

Instead of using the dss bus to iterate displays, this patch adds our
own list of displays which we manage. The panels on the dss bus are
automatically added to this new list.

An "alias" field is also added to omap_dss_device. This field is
set to "display%d", the same way as omap_dss_device's dev name is set.
This alias is later used to keep backward compatibility, when the
embedded dev is no longer used.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/core.c    |  2 ++
 drivers/video/omap2/dss/display.c | 32 ++++++++++++++++++++++++++++++++
 include/video/omapdss.h           |  8 ++++++++
 3 files changed, 42 insertions(+)

diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index f64d0ac..186bc76 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -469,6 +469,7 @@ struct omap_dss_device *dss_alloc_and_init_device(struct device *parent)
 
 int dss_add_device(struct omap_dss_device *dssdev)
 {
+	omapdss_register_display(dssdev);
 	return device_add(&dssdev->dev);
 }
 
@@ -480,6 +481,7 @@ void dss_put_device(struct omap_dss_device *dssdev)
 void dss_unregister_device(struct omap_dss_device *dssdev)
 {
 	device_unregister(&dssdev->dev);
+	omapdss_unregister_display(dssdev);
 }
 
 static int dss_unregister_dss_dev(struct device *dev, void *data)
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 72ac058..1c175a4 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -146,6 +146,38 @@ void dss_disable_all_devices(void)
 	bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
 }
 
+static LIST_HEAD(panel_list);
+static DEFINE_MUTEX(panel_list_mutex);
+static int disp_num_counter;
+
+int omapdss_register_display(struct omap_dss_device *dssdev)
+{
+	struct omap_dss_driver *drv = dssdev->driver;
+
+	snprintf(dssdev->alias, sizeof(dssdev->alias),
+			"display%d", disp_num_counter++);
+
+	if (drv && drv->get_resolution = NULL)
+		drv->get_resolution = omapdss_default_get_resolution;
+	if (drv && drv->get_recommended_bpp = NULL)
+		drv->get_recommended_bpp = omapdss_default_get_recommended_bpp;
+	if (drv && drv->get_timings = NULL)
+		drv->get_timings = omapdss_default_get_timings;
+
+	mutex_lock(&panel_list_mutex);
+	list_add_tail(&dssdev->panel_list, &panel_list);
+	mutex_unlock(&panel_list_mutex);
+	return 0;
+}
+EXPORT_SYMBOL(omapdss_register_display);
+
+void omapdss_unregister_display(struct omap_dss_device *dssdev)
+{
+	mutex_lock(&panel_list_mutex);
+	list_del(&dssdev->panel_list);
+	mutex_unlock(&panel_list_mutex);
+}
+EXPORT_SYMBOL(omapdss_unregister_display);
 
 void omap_dss_get_device(struct omap_dss_device *dssdev)
 {
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 6c422f7..b19a8d2 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -598,6 +598,11 @@ struct omap_dss_output {
 struct omap_dss_device {
 	struct device dev;
 
+	struct list_head panel_list;
+
+	/* alias in the form of "display%d" */
+	char alias[16];
+
 	enum omap_display_type type;
 
 	/* obsolete, to be removed */
@@ -758,6 +763,9 @@ enum omapdss_version omapdss_get_version(void);
 int omap_dss_register_driver(struct omap_dss_driver *);
 void omap_dss_unregister_driver(struct omap_dss_driver *);
 
+int omapdss_register_display(struct omap_dss_device *dssdev);
+void omapdss_unregister_display(struct omap_dss_device *dssdev);
+
 void omap_dss_get_device(struct omap_dss_device *dssdev);
 void omap_dss_put_device(struct omap_dss_device *dssdev);
 #define for_each_dss_dev(d) while ((d = omap_dss_get_next_device(d)) != NULL)
-- 
1.8.1.2

[PATCH 21/32] OMAPDSS: add panel list

[Tomi Valkeinen]

We currently use the omapdss bus (which contains all the available
displays) to iterate the displays. As the omapdss bus is on its way out,
this needs to be changed.

Instead of using the dss bus to iterate displays, this patch adds our
own list of displays which we manage. The panels on the dss bus are
automatically added to this new list.

An "alias" field is also added to omap_dss_device. This field is
set to "display%d", the same way as omap_dss_device's dev name is set.
This alias is later used to keep backward compatibility, when the
embedded dev is no longer used.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/core.c    |  2 ++
 drivers/video/omap2/dss/display.c | 32 ++++++++++++++++++++++++++++++++
 include/video/omapdss.h           |  8 ++++++++
 3 files changed, 42 insertions(+)

diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index f64d0ac..186bc76 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -469,6 +469,7 @@ struct omap_dss_device *dss_alloc_and_init_device(struct device *parent)
 
 int dss_add_device(struct omap_dss_device *dssdev)
 {
+	omapdss_register_display(dssdev);
 	return device_add(&dssdev->dev);
 }
 
@@ -480,6 +481,7 @@ void dss_put_device(struct omap_dss_device *dssdev)
 void dss_unregister_device(struct omap_dss_device *dssdev)
 {
 	device_unregister(&dssdev->dev);
+	omapdss_unregister_display(dssdev);
 }
 
 static int dss_unregister_dss_dev(struct device *dev, void *data)
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 72ac058..1c175a4 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -146,6 +146,38 @@ void dss_disable_all_devices(void)
 	bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
 }
 
+static LIST_HEAD(panel_list);
+static DEFINE_MUTEX(panel_list_mutex);
+static int disp_num_counter;
+
+int omapdss_register_display(struct omap_dss_device *dssdev)
+{
+	struct omap_dss_driver *drv = dssdev->driver;
+
+	snprintf(dssdev->alias, sizeof(dssdev->alias),
+			"display%d", disp_num_counter++);
+
+	if (drv && drv->get_resolution == NULL)
+		drv->get_resolution = omapdss_default_get_resolution;
+	if (drv && drv->get_recommended_bpp == NULL)
+		drv->get_recommended_bpp = omapdss_default_get_recommended_bpp;
+	if (drv && drv->get_timings == NULL)
+		drv->get_timings = omapdss_default_get_timings;
+
+	mutex_lock(&panel_list_mutex);
+	list_add_tail(&dssdev->panel_list, &panel_list);
+	mutex_unlock(&panel_list_mutex);
+	return 0;
+}
+EXPORT_SYMBOL(omapdss_register_display);
+
+void omapdss_unregister_display(struct omap_dss_device *dssdev)
+{
+	mutex_lock(&panel_list_mutex);
+	list_del(&dssdev->panel_list);
+	mutex_unlock(&panel_list_mutex);
+}
+EXPORT_SYMBOL(omapdss_unregister_display);
 
 void omap_dss_get_device(struct omap_dss_device *dssdev)
 {
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 6c422f7..b19a8d2 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -598,6 +598,11 @@ struct omap_dss_output {
 struct omap_dss_device {
 	struct device dev;
 
+	struct list_head panel_list;
+
+	/* alias in the form of "display%d" */
+	char alias[16];
+
 	enum omap_display_type type;
 
 	/* obsolete, to be removed */
@@ -758,6 +763,9 @@ enum omapdss_version omapdss_get_version(void);
 int omap_dss_register_driver(struct omap_dss_driver *);
 void omap_dss_unregister_driver(struct omap_dss_driver *);
 
+int omapdss_register_display(struct omap_dss_device *dssdev);
+void omapdss_unregister_display(struct omap_dss_device *dssdev);
+
 void omap_dss_get_device(struct omap_dss_device *dssdev);
 void omap_dss_put_device(struct omap_dss_device *dssdev);
 #define for_each_dss_dev(d) while ((d = omap_dss_get_next_device(d)) != NULL)
-- 
1.8.1.2

[PATCH 22/32] OMAPDSS: use the panel list in omap_dss_get_next_device

[Tomi Valkeinen]

omap_dss_get_next_device() uses the dss bus to iterate over the
displays. This patch changes omap_dss_get_next_device() to use the new
panel list instead.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/display.c | 54 ++++++++++++++++++++++++++++-----------
 1 file changed, 39 insertions(+), 15 deletions(-)

diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 1c175a4..ba83ec3 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -191,27 +191,51 @@ void omap_dss_put_device(struct omap_dss_device *dssdev)
 }
 EXPORT_SYMBOL(omap_dss_put_device);
 
-/* ref count of the found device is incremented. ref count
- * of from-device is decremented. */
+/*
+ * ref count of the found device is incremented.
+ * ref count of from-device is decremented.
+ */
 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
 {
-	struct device *dev;
-	struct device *dev_start = NULL;
-	struct omap_dss_device *dssdev = NULL;
+	struct list_head *l;
+	struct omap_dss_device *dssdev;
+
+	mutex_lock(&panel_list_mutex);
 
-	int match(struct device *dev, void *data)
-	{
-		return 1;
+	if (list_empty(&panel_list)) {
+		dssdev = NULL;
+		goto out;
 	}
 
-	if (from)
-		dev_start = &from->dev;
-	dev = bus_find_device(dss_get_bus(), dev_start, NULL, match);
-	if (dev)
-		dssdev = to_dss_device(dev);
-	if (from)
-		put_device(&from->dev);
+	if (from = NULL) {
+		dssdev = list_first_entry(&panel_list, struct omap_dss_device,
+				panel_list);
+		omap_dss_get_device(dssdev);
+		goto out;
+	}
+
+	omap_dss_put_device(from);
+
+	list_for_each(l, &panel_list) {
+		dssdev = list_entry(l, struct omap_dss_device, panel_list);
+		if (dssdev = from) {
+			if (list_is_last(l, &panel_list)) {
+				dssdev = NULL;
+				goto out;
+			}
+
+			dssdev = list_entry(l->next, struct omap_dss_device,
+					panel_list);
+			omap_dss_get_device(dssdev);
+			goto out;
+		}
+	}
 
+	WARN(1, "'from' dssdev not found\n");
+
+	dssdev = NULL;
+out:
+	mutex_unlock(&panel_list_mutex);
 	return dssdev;
 }
 EXPORT_SYMBOL(omap_dss_get_next_device);
-- 
1.8.1.2

[PATCH 22/32] OMAPDSS: use the panel list in omap_dss_get_next_device

[Tomi Valkeinen]

omap_dss_get_next_device() uses the dss bus to iterate over the
displays. This patch changes omap_dss_get_next_device() to use the new
panel list instead.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/display.c | 54 ++++++++++++++++++++++++++++-----------
 1 file changed, 39 insertions(+), 15 deletions(-)

diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 1c175a4..ba83ec3 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -191,27 +191,51 @@ void omap_dss_put_device(struct omap_dss_device *dssdev)
 }
 EXPORT_SYMBOL(omap_dss_put_device);
 
-/* ref count of the found device is incremented. ref count
- * of from-device is decremented. */
+/*
+ * ref count of the found device is incremented.
+ * ref count of from-device is decremented.
+ */
 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
 {
-	struct device *dev;
-	struct device *dev_start = NULL;
-	struct omap_dss_device *dssdev = NULL;
+	struct list_head *l;
+	struct omap_dss_device *dssdev;
+
+	mutex_lock(&panel_list_mutex);
 
-	int match(struct device *dev, void *data)
-	{
-		return 1;
+	if (list_empty(&panel_list)) {
+		dssdev = NULL;
+		goto out;
 	}
 
-	if (from)
-		dev_start = &from->dev;
-	dev = bus_find_device(dss_get_bus(), dev_start, NULL, match);
-	if (dev)
-		dssdev = to_dss_device(dev);
-	if (from)
-		put_device(&from->dev);
+	if (from == NULL) {
+		dssdev = list_first_entry(&panel_list, struct omap_dss_device,
+				panel_list);
+		omap_dss_get_device(dssdev);
+		goto out;
+	}
+
+	omap_dss_put_device(from);
+
+	list_for_each(l, &panel_list) {
+		dssdev = list_entry(l, struct omap_dss_device, panel_list);
+		if (dssdev == from) {
+			if (list_is_last(l, &panel_list)) {
+				dssdev = NULL;
+				goto out;
+			}
+
+			dssdev = list_entry(l->next, struct omap_dss_device,
+					panel_list);
+			omap_dss_get_device(dssdev);
+			goto out;
+		}
+	}
 
+	WARN(1, "'from' dssdev not found\n");
+
+	dssdev = NULL;
+out:
+	mutex_unlock(&panel_list_mutex);
 	return dssdev;
 }
 EXPORT_SYMBOL(omap_dss_get_next_device);
-- 
1.8.1.2

[PATCH 23/32] OMAPDSS: don't use dss bus in suspend/resume

[Tomi Valkeinen]

We have support functions to suspend and resume all the displays that
are used with system suspend. These functions use the dss bus to iterate
the display devices.

As we aim to remove the custom dss bus totally, this patch removes the
explicit use of dss bus from these functions. Instead the
for_each_dss_dev() macro is used to go through the devices.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/display.c | 77 ++++++++++++++-------------------------
 1 file changed, 28 insertions(+), 49 deletions(-)

diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index ba83ec3..dfe3322 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -76,74 +76,53 @@ void omapdss_default_get_timings(struct omap_dss_device *dssdev,
 }
 EXPORT_SYMBOL(omapdss_default_get_timings);
 
-static int dss_suspend_device(struct device *dev, void *data)
-{
-	struct omap_dss_device *dssdev = to_dss_device(dev);
-
-	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
-		dssdev->activate_after_resume = false;
-		return 0;
-	}
-
-	dssdev->driver->disable(dssdev);
-
-	dssdev->activate_after_resume = true;
-
-	return 0;
-}
-
 int dss_suspend_all_devices(void)
 {
-	int r;
-	struct bus_type *bus = dss_get_bus();
-
-	r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device);
-	if (r) {
-		/* resume all displays that were suspended */
-		dss_resume_all_devices();
-		return r;
-	}
-
-	return 0;
-}
+	struct omap_dss_device *dssdev = NULL;
 
-static int dss_resume_device(struct device *dev, void *data)
-{
-	int r;
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	for_each_dss_dev(dssdev) {
+		if (!dssdev->driver)
+			continue;
 
-	if (dssdev->activate_after_resume) {
-		r = dssdev->driver->enable(dssdev);
-		if (r)
-			return r;
+		if (dssdev->state = OMAP_DSS_DISPLAY_ACTIVE) {
+			dssdev->driver->disable(dssdev);
+			dssdev->activate_after_resume = true;
+		} else {
+			dssdev->activate_after_resume = false;
+		}
 	}
 
-	dssdev->activate_after_resume = false;
-
 	return 0;
 }
 
 int dss_resume_all_devices(void)
 {
-	struct bus_type *bus = dss_get_bus();
-
-	return bus_for_each_dev(bus, NULL, NULL, dss_resume_device);
-}
+	struct omap_dss_device *dssdev = NULL;
 
-static int dss_disable_device(struct device *dev, void *data)
-{
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	for_each_dss_dev(dssdev) {
+		if (!dssdev->driver)
+			continue;
 
-	if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
-		dssdev->driver->disable(dssdev);
+		if (dssdev->activate_after_resume) {
+			dssdev->driver->enable(dssdev);
+			dssdev->activate_after_resume = false;
+		}
+	}
 
 	return 0;
 }
 
 void dss_disable_all_devices(void)
 {
-	struct bus_type *bus = dss_get_bus();
-	bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
+	struct omap_dss_device *dssdev = NULL;
+
+	for_each_dss_dev(dssdev) {
+		if (!dssdev->driver)
+			continue;
+
+		if (dssdev->state = OMAP_DSS_DISPLAY_ACTIVE)
+			dssdev->driver->disable(dssdev);
+	}
 }
 
 static LIST_HEAD(panel_list);
-- 
1.8.1.2

[PATCH 23/32] OMAPDSS: don't use dss bus in suspend/resume

[Tomi Valkeinen]

We have support functions to suspend and resume all the displays that
are used with system suspend. These functions use the dss bus to iterate
the display devices.

As we aim to remove the custom dss bus totally, this patch removes the
explicit use of dss bus from these functions. Instead the
for_each_dss_dev() macro is used to go through the devices.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/display.c | 77 ++++++++++++++-------------------------
 1 file changed, 28 insertions(+), 49 deletions(-)

diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index ba83ec3..dfe3322 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -76,74 +76,53 @@ void omapdss_default_get_timings(struct omap_dss_device *dssdev,
 }
 EXPORT_SYMBOL(omapdss_default_get_timings);
 
-static int dss_suspend_device(struct device *dev, void *data)
-{
-	struct omap_dss_device *dssdev = to_dss_device(dev);
-
-	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
-		dssdev->activate_after_resume = false;
-		return 0;
-	}
-
-	dssdev->driver->disable(dssdev);
-
-	dssdev->activate_after_resume = true;
-
-	return 0;
-}
-
 int dss_suspend_all_devices(void)
 {
-	int r;
-	struct bus_type *bus = dss_get_bus();
-
-	r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device);
-	if (r) {
-		/* resume all displays that were suspended */
-		dss_resume_all_devices();
-		return r;
-	}
-
-	return 0;
-}
+	struct omap_dss_device *dssdev = NULL;
 
-static int dss_resume_device(struct device *dev, void *data)
-{
-	int r;
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	for_each_dss_dev(dssdev) {
+		if (!dssdev->driver)
+			continue;
 
-	if (dssdev->activate_after_resume) {
-		r = dssdev->driver->enable(dssdev);
-		if (r)
-			return r;
+		if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
+			dssdev->driver->disable(dssdev);
+			dssdev->activate_after_resume = true;
+		} else {
+			dssdev->activate_after_resume = false;
+		}
 	}
 
-	dssdev->activate_after_resume = false;
-
 	return 0;
 }
 
 int dss_resume_all_devices(void)
 {
-	struct bus_type *bus = dss_get_bus();
-
-	return bus_for_each_dev(bus, NULL, NULL, dss_resume_device);
-}
+	struct omap_dss_device *dssdev = NULL;
 
-static int dss_disable_device(struct device *dev, void *data)
-{
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	for_each_dss_dev(dssdev) {
+		if (!dssdev->driver)
+			continue;
 
-	if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
-		dssdev->driver->disable(dssdev);
+		if (dssdev->activate_after_resume) {
+			dssdev->driver->enable(dssdev);
+			dssdev->activate_after_resume = false;
+		}
+	}
 
 	return 0;
 }
 
 void dss_disable_all_devices(void)
 {
-	struct bus_type *bus = dss_get_bus();
-	bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
+	struct omap_dss_device *dssdev = NULL;
+
+	for_each_dss_dev(dssdev) {
+		if (!dssdev->driver)
+			continue;
+
+		if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+			dssdev->driver->disable(dssdev);
+	}
 }
 
 static LIST_HEAD(panel_list);
-- 
1.8.1.2

[PATCH 24/32] OMAPDSS: implement display sysfs without dss bus

[Tomi Valkeinen]

We aim to remove the custom omapdss bus totally, as it's quite a strange
construct and won't be compatible with common display framework. One
problem on the road is that we have sysfs files for each display, and
they depend on the omapdss bus.

This patch creates the display sysfs files independent of the omapdss
bus. This gives us backwards compatibility without using the omapdss bus
for the sysfs files.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/apply.c         |  15 ++--
 drivers/video/omap2/dss/core.c          |  28 -------
 drivers/video/omap2/dss/display-sysfs.c | 125 ++++++++++++++++++--------------
 drivers/video/omap2/dss/dss.h           |   6 +-
 4 files changed, 79 insertions(+), 95 deletions(-)

diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index dbd3c2f..ced656a 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -1581,7 +1581,6 @@ static DEFINE_MUTEX(compat_init_lock);
 int omapdss_compat_init(void)
 {
 	struct platform_device *pdev = dss_get_core_pdev();
-	struct omap_dss_device *dssdev = NULL;
 	int i, r;
 
 	mutex_lock(&compat_init_lock);
@@ -1627,12 +1626,9 @@ int omapdss_compat_init(void)
 	if (r)
 		goto err_mgr_ops;
 
-	for_each_dss_dev(dssdev) {
-		r = display_init_sysfs(pdev, dssdev);
-		/* XXX uninit sysfs files on error */
-		if (r)
-			goto err_disp_sysfs;
-	}
+	r = display_init_sysfs(pdev);
+	if (r)
+		goto err_disp_sysfs;
 
 	dispc_runtime_get();
 
@@ -1649,6 +1645,7 @@ out:
 
 err_init_irq:
 	dispc_runtime_put();
+	display_uninit_sysfs(pdev);
 
 err_disp_sysfs:
 	dss_uninstall_mgr_ops();
@@ -1668,7 +1665,6 @@ EXPORT_SYMBOL(omapdss_compat_init);
 void omapdss_compat_uninit(void)
 {
 	struct platform_device *pdev = dss_get_core_pdev();
-	struct omap_dss_device *dssdev = NULL;
 
 	mutex_lock(&compat_init_lock);
 
@@ -1677,8 +1673,7 @@ void omapdss_compat_uninit(void)
 
 	dss_dispc_uninitialize_irq();
 
-	for_each_dss_dev(dssdev)
-		display_uninit_sysfs(pdev, dssdev);
+	display_uninit_sysfs(pdev);
 
 	dss_uninstall_mgr_ops();
 
diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 186bc76..e88d5f0 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -284,37 +284,9 @@ static int dss_bus_match(struct device *dev, struct device_driver *driver)
 	return strcmp(dssdev->driver_name, driver->name) = 0;
 }
 
-static ssize_t device_name_show(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	struct omap_dss_device *dssdev = to_dss_device(dev);
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			dssdev->name ?
-			dssdev->name : "");
-}
-
-static struct device_attribute default_dev_attrs[] = {
-	__ATTR(name, S_IRUGO, device_name_show, NULL),
-	__ATTR_NULL,
-};
-
-static ssize_t driver_name_show(struct device_driver *drv, char *buf)
-{
-	struct omap_dss_driver *dssdrv = to_dss_driver(drv);
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			dssdrv->driver.name ?
-			dssdrv->driver.name : "");
-}
-static struct driver_attribute default_drv_attrs[] = {
-	__ATTR(name, S_IRUGO, driver_name_show, NULL),
-	__ATTR_NULL,
-};
-
 static struct bus_type dss_bus_type = {
 	.name = "omapdss",
 	.match = dss_bus_match,
-	.dev_attrs = default_dev_attrs,
-	.drv_attrs = default_drv_attrs,
 };
 
 static void dss_bus_release(struct device *dev)
diff --git a/drivers/video/omap2/dss/display-sysfs.c b/drivers/video/omap2/dss/display-sysfs.c
index 81d5dc6..58abbaf 100644
--- a/drivers/video/omap2/dss/display-sysfs.c
+++ b/drivers/video/omap2/dss/display-sysfs.c
@@ -22,17 +22,40 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/jiffies.h>
 #include <linux/platform_device.h>
+#include <linux/sysfs.h>
 
 #include <video/omapdss.h>
 #include "dss.h"
-#include "dss_features.h"
+
+static struct omap_dss_device *to_dss_device_sysfs(struct device *dev)
+{
+	struct omap_dss_device *dssdev = NULL;
+
+	for_each_dss_dev(dssdev) {
+		if (&dssdev->dev = dev) {
+			omap_dss_put_device(dssdev);
+			return dssdev;
+		}
+	}
+
+	return NULL;
+}
+
+static ssize_t display_name_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
+
+	return snprintf(buf, PAGE_SIZE, "%s\n",
+			dssdev->name ?
+			dssdev->name : "");
+}
 
 static ssize_t display_enabled_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 
 	return snprintf(buf, PAGE_SIZE, "%d\n",
 			omapdss_device_is_enabled(dssdev));
@@ -42,7 +65,7 @@ static ssize_t display_enabled_store(struct device *dev,
 		struct device_attribute *attr,
 		const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int r;
 	bool enable;
 
@@ -70,7 +93,7 @@ static ssize_t display_enabled_store(struct device *dev,
 static ssize_t display_tear_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	return snprintf(buf, PAGE_SIZE, "%d\n",
 			dssdev->driver->get_te ?
 			dssdev->driver->get_te(dssdev) : 0);
@@ -79,7 +102,7 @@ static ssize_t display_tear_show(struct device *dev,
 static ssize_t display_tear_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int r;
 	bool te;
 
@@ -100,7 +123,7 @@ static ssize_t display_tear_store(struct device *dev,
 static ssize_t display_timings_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	struct omap_video_timings t;
 
 	if (!dssdev->driver->get_timings)
@@ -117,7 +140,7 @@ static ssize_t display_timings_show(struct device *dev,
 static ssize_t display_timings_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	struct omap_video_timings t = dssdev->panel.timings;
 	int r, found;
 
@@ -156,7 +179,7 @@ static ssize_t display_timings_store(struct device *dev,
 static ssize_t display_rotate_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int rotate;
 	if (!dssdev->driver->get_rotate)
 		return -ENOENT;
@@ -167,7 +190,7 @@ static ssize_t display_rotate_show(struct device *dev,
 static ssize_t display_rotate_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int rot, r;
 
 	if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
@@ -187,7 +210,7 @@ static ssize_t display_rotate_store(struct device *dev,
 static ssize_t display_mirror_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int mirror;
 	if (!dssdev->driver->get_mirror)
 		return -ENOENT;
@@ -198,7 +221,7 @@ static ssize_t display_mirror_show(struct device *dev,
 static ssize_t display_mirror_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int r;
 	bool mirror;
 
@@ -219,7 +242,7 @@ static ssize_t display_mirror_store(struct device *dev,
 static ssize_t display_wss_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	unsigned int wss;
 
 	if (!dssdev->driver->get_wss)
@@ -233,7 +256,7 @@ static ssize_t display_wss_show(struct device *dev,
 static ssize_t display_wss_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	u32 wss;
 	int r;
 
@@ -254,6 +277,7 @@ static ssize_t display_wss_store(struct device *dev,
 	return size;
 }
 
+static DEVICE_ATTR(name, S_IRUGO, display_name_show, NULL);
 static DEVICE_ATTR(enabled, S_IRUGO|S_IWUSR,
 		display_enabled_show, display_enabled_store);
 static DEVICE_ATTR(tear_elim, S_IRUGO|S_IWUSR,
@@ -267,59 +291,54 @@ static DEVICE_ATTR(mirror, S_IRUGO|S_IWUSR,
 static DEVICE_ATTR(wss, S_IRUGO|S_IWUSR,
 		display_wss_show, display_wss_store);
 
-static struct device_attribute *display_sysfs_attrs[] = {
-	&dev_attr_enabled,
-	&dev_attr_tear_elim,
-	&dev_attr_timings,
-	&dev_attr_rotate,
-	&dev_attr_mirror,
-	&dev_attr_wss,
+static const struct attribute *display_sysfs_attrs[] = {
+	&dev_attr_name.attr,
+	&dev_attr_enabled.attr,
+	&dev_attr_tear_elim.attr,
+	&dev_attr_timings.attr,
+	&dev_attr_rotate.attr,
+	&dev_attr_mirror.attr,
+	&dev_attr_wss.attr,
 	NULL
 };
 
-int display_init_sysfs(struct platform_device *pdev,
-		struct omap_dss_device *dssdev)
+int display_init_sysfs(struct platform_device *pdev)
 {
-	struct device_attribute *attr;
-	int i, r;
+	struct omap_dss_device *dssdev = NULL;
+	int r;
 
-	/* create device sysfs files */
-	i = 0;
-	while ((attr = display_sysfs_attrs[i++]) != NULL) {
-		r = device_create_file(&dssdev->dev, attr);
-		if (r) {
-			for (i = i - 2; i >= 0; i--) {
-				attr = display_sysfs_attrs[i];
-				device_remove_file(&dssdev->dev, attr);
-			}
+	for_each_dss_dev(dssdev) {
+		struct kobject *kobj = &dssdev->dev.kobj;
 
-			DSSERR("failed to create sysfs file\n");
-			return r;
+		r = sysfs_create_files(kobj, display_sysfs_attrs);
+		if (r) {
+			DSSERR("failed to create sysfs files\n");
+			goto err;
 		}
-	}
 
-	/* create display? sysfs links */
-	r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj,
-			dev_name(&dssdev->dev));
-	if (r) {
-		while ((attr = display_sysfs_attrs[i++]) != NULL)
-			device_remove_file(&dssdev->dev, attr);
+		r = sysfs_create_link(&pdev->dev.kobj, kobj, dssdev->alias);
+		if (r) {
+			sysfs_remove_files(kobj, display_sysfs_attrs);
 
-		DSSERR("failed to create sysfs display link\n");
-		return r;
+			DSSERR("failed to create sysfs display link\n");
+			goto err;
+		}
 	}
 
 	return 0;
+
+err:
+	display_uninit_sysfs(pdev);
+
+	return r;
 }
 
-void display_uninit_sysfs(struct platform_device *pdev,
-		struct omap_dss_device *dssdev)
+void display_uninit_sysfs(struct platform_device *pdev)
 {
-	struct device_attribute *attr;
-	int i = 0;
-
-	sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev));
+	struct omap_dss_device *dssdev = NULL;
 
-	while ((attr = display_sysfs_attrs[i++]) != NULL)
-		device_remove_file(&dssdev->dev, attr);
+	for_each_dss_dev(dssdev) {
+		sysfs_remove_link(&pdev->dev.kobj, dssdev->alias);
+		sysfs_remove_files(&dssdev->dev.kobj, display_sysfs_attrs);
+	}
 }
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 7964d3b..03d729a 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -188,10 +188,8 @@ int dss_suspend_all_devices(void);
 int dss_resume_all_devices(void);
 void dss_disable_all_devices(void);
 
-int display_init_sysfs(struct platform_device *pdev,
-		struct omap_dss_device *dssdev);
-void display_uninit_sysfs(struct platform_device *pdev,
-		struct omap_dss_device *dssdev);
+int display_init_sysfs(struct platform_device *pdev);
+void display_uninit_sysfs(struct platform_device *pdev);
 
 /* manager */
 int dss_init_overlay_managers(void);
-- 
1.8.1.2

[PATCH 24/32] OMAPDSS: implement display sysfs without dss bus

[Tomi Valkeinen]

We aim to remove the custom omapdss bus totally, as it's quite a strange
construct and won't be compatible with common display framework. One
problem on the road is that we have sysfs files for each display, and
they depend on the omapdss bus.

This patch creates the display sysfs files independent of the omapdss
bus. This gives us backwards compatibility without using the omapdss bus
for the sysfs files.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/apply.c         |  15 ++--
 drivers/video/omap2/dss/core.c          |  28 -------
 drivers/video/omap2/dss/display-sysfs.c | 125 ++++++++++++++++++--------------
 drivers/video/omap2/dss/dss.h           |   6 +-
 4 files changed, 79 insertions(+), 95 deletions(-)

diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index dbd3c2f..ced656a 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -1581,7 +1581,6 @@ static DEFINE_MUTEX(compat_init_lock);
 int omapdss_compat_init(void)
 {
 	struct platform_device *pdev = dss_get_core_pdev();
-	struct omap_dss_device *dssdev = NULL;
 	int i, r;
 
 	mutex_lock(&compat_init_lock);
@@ -1627,12 +1626,9 @@ int omapdss_compat_init(void)
 	if (r)
 		goto err_mgr_ops;
 
-	for_each_dss_dev(dssdev) {
-		r = display_init_sysfs(pdev, dssdev);
-		/* XXX uninit sysfs files on error */
-		if (r)
-			goto err_disp_sysfs;
-	}
+	r = display_init_sysfs(pdev);
+	if (r)
+		goto err_disp_sysfs;
 
 	dispc_runtime_get();
 
@@ -1649,6 +1645,7 @@ out:
 
 err_init_irq:
 	dispc_runtime_put();
+	display_uninit_sysfs(pdev);
 
 err_disp_sysfs:
 	dss_uninstall_mgr_ops();
@@ -1668,7 +1665,6 @@ EXPORT_SYMBOL(omapdss_compat_init);
 void omapdss_compat_uninit(void)
 {
 	struct platform_device *pdev = dss_get_core_pdev();
-	struct omap_dss_device *dssdev = NULL;
 
 	mutex_lock(&compat_init_lock);
 
@@ -1677,8 +1673,7 @@ void omapdss_compat_uninit(void)
 
 	dss_dispc_uninitialize_irq();
 
-	for_each_dss_dev(dssdev)
-		display_uninit_sysfs(pdev, dssdev);
+	display_uninit_sysfs(pdev);
 
 	dss_uninstall_mgr_ops();
 
diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 186bc76..e88d5f0 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -284,37 +284,9 @@ static int dss_bus_match(struct device *dev, struct device_driver *driver)
 	return strcmp(dssdev->driver_name, driver->name) == 0;
 }
 
-static ssize_t device_name_show(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	struct omap_dss_device *dssdev = to_dss_device(dev);
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			dssdev->name ?
-			dssdev->name : "");
-}
-
-static struct device_attribute default_dev_attrs[] = {
-	__ATTR(name, S_IRUGO, device_name_show, NULL),
-	__ATTR_NULL,
-};
-
-static ssize_t driver_name_show(struct device_driver *drv, char *buf)
-{
-	struct omap_dss_driver *dssdrv = to_dss_driver(drv);
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			dssdrv->driver.name ?
-			dssdrv->driver.name : "");
-}
-static struct driver_attribute default_drv_attrs[] = {
-	__ATTR(name, S_IRUGO, driver_name_show, NULL),
-	__ATTR_NULL,
-};
-
 static struct bus_type dss_bus_type = {
 	.name = "omapdss",
 	.match = dss_bus_match,
-	.dev_attrs = default_dev_attrs,
-	.drv_attrs = default_drv_attrs,
 };
 
 static void dss_bus_release(struct device *dev)
diff --git a/drivers/video/omap2/dss/display-sysfs.c b/drivers/video/omap2/dss/display-sysfs.c
index 81d5dc6..58abbaf 100644
--- a/drivers/video/omap2/dss/display-sysfs.c
+++ b/drivers/video/omap2/dss/display-sysfs.c
@@ -22,17 +22,40 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/jiffies.h>
 #include <linux/platform_device.h>
+#include <linux/sysfs.h>
 
 #include <video/omapdss.h>
 #include "dss.h"
-#include "dss_features.h"
+
+static struct omap_dss_device *to_dss_device_sysfs(struct device *dev)
+{
+	struct omap_dss_device *dssdev = NULL;
+
+	for_each_dss_dev(dssdev) {
+		if (&dssdev->dev == dev) {
+			omap_dss_put_device(dssdev);
+			return dssdev;
+		}
+	}
+
+	return NULL;
+}
+
+static ssize_t display_name_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
+
+	return snprintf(buf, PAGE_SIZE, "%s\n",
+			dssdev->name ?
+			dssdev->name : "");
+}
 
 static ssize_t display_enabled_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 
 	return snprintf(buf, PAGE_SIZE, "%d\n",
 			omapdss_device_is_enabled(dssdev));
@@ -42,7 +65,7 @@ static ssize_t display_enabled_store(struct device *dev,
 		struct device_attribute *attr,
 		const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int r;
 	bool enable;
 
@@ -70,7 +93,7 @@ static ssize_t display_enabled_store(struct device *dev,
 static ssize_t display_tear_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	return snprintf(buf, PAGE_SIZE, "%d\n",
 			dssdev->driver->get_te ?
 			dssdev->driver->get_te(dssdev) : 0);
@@ -79,7 +102,7 @@ static ssize_t display_tear_show(struct device *dev,
 static ssize_t display_tear_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int r;
 	bool te;
 
@@ -100,7 +123,7 @@ static ssize_t display_tear_store(struct device *dev,
 static ssize_t display_timings_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	struct omap_video_timings t;
 
 	if (!dssdev->driver->get_timings)
@@ -117,7 +140,7 @@ static ssize_t display_timings_show(struct device *dev,
 static ssize_t display_timings_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	struct omap_video_timings t = dssdev->panel.timings;
 	int r, found;
 
@@ -156,7 +179,7 @@ static ssize_t display_timings_store(struct device *dev,
 static ssize_t display_rotate_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int rotate;
 	if (!dssdev->driver->get_rotate)
 		return -ENOENT;
@@ -167,7 +190,7 @@ static ssize_t display_rotate_show(struct device *dev,
 static ssize_t display_rotate_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int rot, r;
 
 	if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
@@ -187,7 +210,7 @@ static ssize_t display_rotate_store(struct device *dev,
 static ssize_t display_mirror_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int mirror;
 	if (!dssdev->driver->get_mirror)
 		return -ENOENT;
@@ -198,7 +221,7 @@ static ssize_t display_mirror_show(struct device *dev,
 static ssize_t display_mirror_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	int r;
 	bool mirror;
 
@@ -219,7 +242,7 @@ static ssize_t display_mirror_store(struct device *dev,
 static ssize_t display_wss_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	unsigned int wss;
 
 	if (!dssdev->driver->get_wss)
@@ -233,7 +256,7 @@ static ssize_t display_wss_show(struct device *dev,
 static ssize_t display_wss_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct omap_dss_device *dssdev = to_dss_device(dev);
+	struct omap_dss_device *dssdev = to_dss_device_sysfs(dev);
 	u32 wss;
 	int r;
 
@@ -254,6 +277,7 @@ static ssize_t display_wss_store(struct device *dev,
 	return size;
 }
 
+static DEVICE_ATTR(name, S_IRUGO, display_name_show, NULL);
 static DEVICE_ATTR(enabled, S_IRUGO|S_IWUSR,
 		display_enabled_show, display_enabled_store);
 static DEVICE_ATTR(tear_elim, S_IRUGO|S_IWUSR,
@@ -267,59 +291,54 @@ static DEVICE_ATTR(mirror, S_IRUGO|S_IWUSR,
 static DEVICE_ATTR(wss, S_IRUGO|S_IWUSR,
 		display_wss_show, display_wss_store);
 
-static struct device_attribute *display_sysfs_attrs[] = {
-	&dev_attr_enabled,
-	&dev_attr_tear_elim,
-	&dev_attr_timings,
-	&dev_attr_rotate,
-	&dev_attr_mirror,
-	&dev_attr_wss,
+static const struct attribute *display_sysfs_attrs[] = {
+	&dev_attr_name.attr,
+	&dev_attr_enabled.attr,
+	&dev_attr_tear_elim.attr,
+	&dev_attr_timings.attr,
+	&dev_attr_rotate.attr,
+	&dev_attr_mirror.attr,
+	&dev_attr_wss.attr,
 	NULL
 };
 
-int display_init_sysfs(struct platform_device *pdev,
-		struct omap_dss_device *dssdev)
+int display_init_sysfs(struct platform_device *pdev)
 {
-	struct device_attribute *attr;
-	int i, r;
+	struct omap_dss_device *dssdev = NULL;
+	int r;
 
-	/* create device sysfs files */
-	i = 0;
-	while ((attr = display_sysfs_attrs[i++]) != NULL) {
-		r = device_create_file(&dssdev->dev, attr);
-		if (r) {
-			for (i = i - 2; i >= 0; i--) {
-				attr = display_sysfs_attrs[i];
-				device_remove_file(&dssdev->dev, attr);
-			}
+	for_each_dss_dev(dssdev) {
+		struct kobject *kobj = &dssdev->dev.kobj;
 
-			DSSERR("failed to create sysfs file\n");
-			return r;
+		r = sysfs_create_files(kobj, display_sysfs_attrs);
+		if (r) {
+			DSSERR("failed to create sysfs files\n");
+			goto err;
 		}
-	}
 
-	/* create display? sysfs links */
-	r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj,
-			dev_name(&dssdev->dev));
-	if (r) {
-		while ((attr = display_sysfs_attrs[i++]) != NULL)
-			device_remove_file(&dssdev->dev, attr);
+		r = sysfs_create_link(&pdev->dev.kobj, kobj, dssdev->alias);
+		if (r) {
+			sysfs_remove_files(kobj, display_sysfs_attrs);
 
-		DSSERR("failed to create sysfs display link\n");
-		return r;
+			DSSERR("failed to create sysfs display link\n");
+			goto err;
+		}
 	}
 
 	return 0;
+
+err:
+	display_uninit_sysfs(pdev);
+
+	return r;
 }
 
-void display_uninit_sysfs(struct platform_device *pdev,
-		struct omap_dss_device *dssdev)
+void display_uninit_sysfs(struct platform_device *pdev)
 {
-	struct device_attribute *attr;
-	int i = 0;
-
-	sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev));
+	struct omap_dss_device *dssdev = NULL;
 
-	while ((attr = display_sysfs_attrs[i++]) != NULL)
-		device_remove_file(&dssdev->dev, attr);
+	for_each_dss_dev(dssdev) {
+		sysfs_remove_link(&pdev->dev.kobj, dssdev->alias);
+		sysfs_remove_files(&dssdev->dev.kobj, display_sysfs_attrs);
+	}
 }
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 7964d3b..03d729a 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -188,10 +188,8 @@ int dss_suspend_all_devices(void);
 int dss_resume_all_devices(void);
 void dss_disable_all_devices(void);
 
-int display_init_sysfs(struct platform_device *pdev,
-		struct omap_dss_device *dssdev);
-void display_uninit_sysfs(struct platform_device *pdev,
-		struct omap_dss_device *dssdev);
+int display_init_sysfs(struct platform_device *pdev);
+void display_uninit_sysfs(struct platform_device *pdev);
 
 /* manager */
 int dss_init_overlay_managers(void);
-- 
1.8.1.2

[PATCH 25/32] OMAPDSS: Add panel dev pointer to dssdev

[Tomi Valkeinen]

We are about to remove the dss bus support, which also means that the
omap_dss_device won't be a real device anymore. This means that the
embedded "dev" struct needs to be removed from omap_dss_device.

After we've finished the removal of the dss bus, we see the following
changes:

- struct omap_dss_device won't be a real Linux device anymore, but more
  like a "display entity".
- struct omap_dss_driver won't be a Linux device driver, but "display
  entity ops".
- The panel devices/drivers won't be omapdss devices/drivers, but
  platform/i2c/spi/etc devices/drivers, whichever fits the control
  mechanism of the panel.
- The panel drivers will create omap_dss_device and omap_dss_driver,
  fill the required fields, and register the omap_dss_device to
  omapdss.
- omap_dss_device won't have an embedded dev struct anymore, but a
  dev pointer to the actual device that manages the omap_dss_device.

The model described above resembles the model that has been discussed
with CDF (common display framework).

For the duration of the conversion, we temporarily have two devs in the
dssdev, the old "old_dev", which is a full embedded device struct, and the
new "dev", which is a pointer to the device. "old_dev" will be removed
in the future.

For devices belonging to dss bus the dev is initialized to point to
old_dev. This way all the code can just use the dev, for both old and
new style panels.

Both the new and old style panel drivers work during the conversion, and
only after the dss bus support is removed will the old style panels stop
to compile.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/displays/panel-acx565akm.c     |  16 +-
 drivers/video/omap2/displays/panel-generic-dpi.c   |  26 ++--
 .../omap2/displays/panel-lgphilips-lb035q02.c      |  10 +-
 drivers/video/omap2/displays/panel-n8x0.c          |  30 ++--
 .../omap2/displays/panel-nec-nl8048hl11-01b.c      |   4 +-
 drivers/video/omap2/displays/panel-picodlp.c       |  32 ++--
 .../video/omap2/displays/panel-sharp-ls037v7dw01.c |  10 +-
 drivers/video/omap2/displays/panel-taal.c          | 164 ++++++++++-----------
 drivers/video/omap2/displays/panel-tfp410.c        |  32 ++--
 .../video/omap2/displays/panel-tpo-td043mtea1.c    |  36 ++---
 drivers/video/omap2/dss/core.c                     |  18 ++-
 drivers/video/omap2/dss/display-sysfs.c            |   7 +-
 drivers/video/omap2/dss/display.c                  |   9 +-
 drivers/video/omap2/dss/venc_panel.c               |  16 +-
 include/video/omapdss.h                            |   8 +-
 15 files changed, 212 insertions(+), 206 deletions(-)

diff --git a/drivers/video/omap2/displays/panel-acx565akm.c b/drivers/video/omap2/displays/panel-acx565akm.c
index d7f69c0..3fd100f 100644
--- a/drivers/video/omap2/displays/panel-acx565akm.c
+++ b/drivers/video/omap2/displays/panel-acx565akm.c
@@ -510,7 +510,7 @@ static int acx_panel_probe(struct omap_dss_device *dssdev)
 	int max_brightness, brightness;
 	struct backlight_properties props;
 
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 
 	if (!panel_data)
 		return -EINVAL;
@@ -519,7 +519,7 @@ static int acx_panel_probe(struct omap_dss_device *dssdev)
 	dssdev->panel.timings = acx_panel_timings;
 
 	if (gpio_is_valid(panel_data->reset_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, panel_data->reset_gpio,
+		r = devm_gpio_request_one(dssdev->dev, panel_data->reset_gpio,
 				GPIOF_OUT_INIT_LOW, "lcd reset");
 		if (r)
 			return r;
@@ -538,7 +538,7 @@ static int acx_panel_probe(struct omap_dss_device *dssdev)
 
 	r = panel_detect(md);
 	if (r) {
-		dev_err(&dssdev->dev, "%s panel detect error\n", __func__);
+		dev_err(dssdev->dev, "%s panel detect error\n", __func__);
 		if (!md->enabled && gpio_is_valid(panel_data->reset_gpio))
 			gpio_set_value(panel_data->reset_gpio, 0);
 
@@ -593,7 +593,7 @@ static void acx_panel_remove(struct omap_dss_device *dssdev)
 {
 	struct acx565akm_device *md = &acx_dev;
 
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 	sysfs_remove_group(&md->bl_dev->dev.kobj, &bldev_attr_group);
 	backlight_device_unregister(md->bl_dev);
 	mutex_lock(&acx_dev.mutex);
@@ -607,7 +607,7 @@ static int acx_panel_power_on(struct omap_dss_device *dssdev)
 	struct panel_acx565akm_data *panel_data = get_panel_data(dssdev);
 	int r;
 
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 
 	if (dssdev->state = OMAP_DSS_DISPLAY_ACTIVE)
 		return 0;
@@ -667,7 +667,7 @@ static void acx_panel_power_off(struct omap_dss_device *dssdev)
 	struct acx565akm_device *md = &acx_dev;
 	struct panel_acx565akm_data *panel_data = get_panel_data(dssdev);
 
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 
 	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 		return;
@@ -704,7 +704,7 @@ static int acx_panel_enable(struct omap_dss_device *dssdev)
 {
 	int r;
 
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 	r = acx_panel_power_on(dssdev);
 
 	if (r)
@@ -716,7 +716,7 @@ static int acx_panel_enable(struct omap_dss_device *dssdev)
 
 static void acx_panel_disable(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 	acx_panel_power_off(dssdev);
 	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 }
diff --git a/drivers/video/omap2/displays/panel-generic-dpi.c b/drivers/video/omap2/displays/panel-generic-dpi.c
index 97363f7..bebebd4 100644
--- a/drivers/video/omap2/displays/panel-generic-dpi.c
+++ b/drivers/video/omap2/displays/panel-generic-dpi.c
@@ -536,7 +536,7 @@ static int generic_dpi_panel_power_on(struct omap_dss_device *dssdev)
 {
 	int r, i;
 	struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 	struct panel_config *panel_config = drv_data->panel_config;
 
 	if (dssdev->state = OMAP_DSS_DISPLAY_ACTIVE)
@@ -567,7 +567,7 @@ err0:
 static void generic_dpi_panel_power_off(struct omap_dss_device *dssdev)
 {
 	struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 	struct panel_config *panel_config = drv_data->panel_config;
 	int i;
 
@@ -593,7 +593,7 @@ static int generic_dpi_panel_probe(struct omap_dss_device *dssdev)
 	struct panel_drv_data *drv_data = NULL;
 	int i, r;
 
-	dev_dbg(&dssdev->dev, "probe\n");
+	dev_dbg(dssdev->dev, "probe\n");
 
 	if (!panel_data || !panel_data->name)
 		return -EINVAL;
@@ -609,7 +609,7 @@ static int generic_dpi_panel_probe(struct omap_dss_device *dssdev)
 		return -EINVAL;
 
 	for (i = 0; i < panel_data->num_gpios; ++i) {
-		r = devm_gpio_request_one(&dssdev->dev, panel_data->gpios[i],
+		r = devm_gpio_request_one(dssdev->dev, panel_data->gpios[i],
 				panel_data->gpio_invert[i] ?
 				GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
 				"panel gpio");
@@ -619,7 +619,7 @@ static int generic_dpi_panel_probe(struct omap_dss_device *dssdev)
 
 	dssdev->panel.timings = panel_config->timings;
 
-	drv_data = devm_kzalloc(&dssdev->dev, sizeof(*drv_data), GFP_KERNEL);
+	drv_data = devm_kzalloc(dssdev->dev, sizeof(*drv_data), GFP_KERNEL);
 	if (!drv_data)
 		return -ENOMEM;
 
@@ -628,21 +628,21 @@ static int generic_dpi_panel_probe(struct omap_dss_device *dssdev)
 
 	mutex_init(&drv_data->lock);
 
-	dev_set_drvdata(&dssdev->dev, drv_data);
+	dev_set_drvdata(dssdev->dev, drv_data);
 
 	return 0;
 }
 
 static void __exit generic_dpi_panel_remove(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "remove\n");
+	dev_dbg(dssdev->dev, "remove\n");
 
-	dev_set_drvdata(&dssdev->dev, NULL);
+	dev_set_drvdata(dssdev->dev, NULL);
 }
 
 static int generic_dpi_panel_enable(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&drv_data->lock);
@@ -660,7 +660,7 @@ err:
 
 static void generic_dpi_panel_disable(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&drv_data->lock);
 
@@ -674,7 +674,7 @@ static void generic_dpi_panel_disable(struct omap_dss_device *dssdev)
 static void generic_dpi_panel_set_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&drv_data->lock);
 
@@ -688,7 +688,7 @@ static void generic_dpi_panel_set_timings(struct omap_dss_device *dssdev,
 static void generic_dpi_panel_get_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&drv_data->lock);
 
@@ -700,7 +700,7 @@ static void generic_dpi_panel_get_timings(struct omap_dss_device *dssdev,
 static int generic_dpi_panel_check_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&drv_data->lock);
diff --git a/drivers/video/omap2/displays/panel-lgphilips-lb035q02.c b/drivers/video/omap2/displays/panel-lgphilips-lb035q02.c
index 4ea6548..6c51430 100644
--- a/drivers/video/omap2/displays/panel-lgphilips-lb035q02.c
+++ b/drivers/video/omap2/displays/panel-lgphilips-lb035q02.c
@@ -109,12 +109,12 @@ static int lb035q02_panel_probe(struct omap_dss_device *dssdev)
 
 	dssdev->panel.timings = lb035q02_timings;
 
-	ld = devm_kzalloc(&dssdev->dev, sizeof(*ld), GFP_KERNEL);
+	ld = devm_kzalloc(dssdev->dev, sizeof(*ld), GFP_KERNEL);
 	if (!ld)
 		return -ENOMEM;
 
 	for (i = 0; i < panel_data->num_gpios; ++i) {
-		r = devm_gpio_request_one(&dssdev->dev, panel_data->gpios[i],
+		r = devm_gpio_request_one(dssdev->dev, panel_data->gpios[i],
 				panel_data->gpio_invert[i] ?
 				GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
 				"panel gpio");
@@ -123,7 +123,7 @@ static int lb035q02_panel_probe(struct omap_dss_device *dssdev)
 	}
 
 	mutex_init(&ld->lock);
-	dev_set_drvdata(&dssdev->dev, ld);
+	dev_set_drvdata(dssdev->dev, ld);
 
 	return 0;
 }
@@ -134,7 +134,7 @@ static void lb035q02_panel_remove(struct omap_dss_device *dssdev)
 
 static int lb035q02_panel_enable(struct omap_dss_device *dssdev)
 {
-	struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
+	struct lb035q02_data *ld = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&ld->lock);
@@ -153,7 +153,7 @@ err:
 
 static void lb035q02_panel_disable(struct omap_dss_device *dssdev)
 {
-	struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
+	struct lb035q02_data *ld = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&ld->lock);
 
diff --git a/drivers/video/omap2/displays/panel-n8x0.c b/drivers/video/omap2/displays/panel-n8x0.c
index f94ead6..d3860c5 100644
--- a/drivers/video/omap2/displays/panel-n8x0.c
+++ b/drivers/video/omap2/displays/panel-n8x0.c
@@ -311,16 +311,16 @@ static int n8x0_panel_power_on(struct omap_dss_device *dssdev)
 	switch (rev & 0xfc) {
 	case 0x9c:
 		ddata->blizzard_ver = BLIZZARD_VERSION_S1D13744;
-		dev_info(&dssdev->dev, "s1d13744 LCD controller rev %d "
+		dev_info(dssdev->dev, "s1d13744 LCD controller rev %d "
 			"initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
 		break;
 	case 0xa4:
 		ddata->blizzard_ver = BLIZZARD_VERSION_S1D13745;
-		dev_info(&dssdev->dev, "s1d13745 LCD controller rev %d "
+		dev_info(dssdev->dev, "s1d13745 LCD controller rev %d "
 			"initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
 		break;
 	default:
-		dev_err(&dssdev->dev, "invalid s1d1374x revision %02x\n", rev);
+		dev_err(dssdev->dev, "invalid s1d1374x revision %02x\n", rev);
 		r = -ENODEV;
 		goto err_inv_chip;
 	}
@@ -341,13 +341,13 @@ static int n8x0_panel_power_on(struct omap_dss_device *dssdev)
 		panel_name = "ls041y3";
 		break;
 	default:
-		dev_err(&dssdev->dev, "invalid display ID 0x%x\n",
+		dev_err(dssdev->dev, "invalid display ID 0x%x\n",
 				display_id[0]);
 		r = -ENODEV;
 		goto err_inv_panel;
 	}
 
-	dev_info(&dssdev->dev, "%s rev %02x LCD detected\n",
+	dev_info(dssdev->dev, "%s rev %02x LCD detected\n",
 			panel_name, display_id[1]);
 
 	send_sleep_out(spi);
@@ -416,7 +416,7 @@ static int n8x0_panel_probe(struct omap_dss_device *dssdev)
 	struct panel_drv_data *ddata;
 	int r;
 
-	dev_dbg(&dssdev->dev, "probe\n");
+	dev_dbg(dssdev->dev, "probe\n");
 
 	if (!bdata)
 		return -EINVAL;
@@ -434,14 +434,14 @@ static int n8x0_panel_probe(struct omap_dss_device *dssdev)
 	dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE;
 
 	if (gpio_is_valid(bdata->panel_reset)) {
-		r = devm_gpio_request_one(&dssdev->dev, bdata->panel_reset,
+		r = devm_gpio_request_one(dssdev->dev, bdata->panel_reset,
 				GPIOF_OUT_INIT_LOW, "PANEL RESET");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(bdata->ctrl_pwrdown)) {
-		r = devm_gpio_request_one(&dssdev->dev, bdata->ctrl_pwrdown,
+		r = devm_gpio_request_one(dssdev->dev, bdata->ctrl_pwrdown,
 				GPIOF_OUT_INIT_LOW, "PANEL PWRDOWN");
 		if (r)
 			return r;
@@ -452,9 +452,9 @@ static int n8x0_panel_probe(struct omap_dss_device *dssdev)
 
 static void n8x0_panel_remove(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "remove\n");
+	dev_dbg(dssdev->dev, "remove\n");
 
-	dev_set_drvdata(&dssdev->dev, NULL);
+	dev_set_drvdata(dssdev->dev, NULL);
 }
 
 static int n8x0_panel_enable(struct omap_dss_device *dssdev)
@@ -462,7 +462,7 @@ static int n8x0_panel_enable(struct omap_dss_device *dssdev)
 	struct panel_drv_data *ddata = get_drv_data(dssdev);
 	int r;
 
-	dev_dbg(&dssdev->dev, "enable\n");
+	dev_dbg(dssdev->dev, "enable\n");
 
 	mutex_lock(&ddata->lock);
 
@@ -488,7 +488,7 @@ static void n8x0_panel_disable(struct omap_dss_device *dssdev)
 {
 	struct panel_drv_data *ddata = get_drv_data(dssdev);
 
-	dev_dbg(&dssdev->dev, "disable\n");
+	dev_dbg(dssdev->dev, "disable\n");
 
 	mutex_lock(&ddata->lock);
 
@@ -521,13 +521,13 @@ static int n8x0_panel_update(struct omap_dss_device *dssdev,
 	struct panel_drv_data *ddata = get_drv_data(dssdev);
 	u16 dw, dh;
 
-	dev_dbg(&dssdev->dev, "update\n");
+	dev_dbg(dssdev->dev, "update\n");
 
 	dw = dssdev->panel.timings.x_res;
 	dh = dssdev->panel.timings.y_res;
 
 	if (x != 0 || y != 0 || w != dw || h != dh) {
-		dev_err(&dssdev->dev, "invaid update region %d, %d, %d, %d\n",
+		dev_err(dssdev->dev, "invaid update region %d, %d, %d, %d\n",
 			x, y, w, h);
 		return -EINVAL;
 	}
@@ -548,7 +548,7 @@ static int n8x0_panel_sync(struct omap_dss_device *dssdev)
 {
 	struct panel_drv_data *ddata = get_drv_data(dssdev);
 
-	dev_dbg(&dssdev->dev, "sync\n");
+	dev_dbg(dssdev->dev, "sync\n");
 
 	mutex_lock(&ddata->lock);
 	rfbi_bus_lock();
diff --git a/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c b/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
index 20c3cd9..6b9f792 100644
--- a/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
+++ b/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
@@ -98,14 +98,14 @@ static int nec_8048_panel_probe(struct omap_dss_device *dssdev)
 	dssdev->panel.timings = nec_8048_panel_timings;
 
 	if (gpio_is_valid(pd->qvga_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->qvga_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->qvga_gpio,
 				GPIOF_OUT_INIT_HIGH, "lcd QVGA");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(pd->res_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->res_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->res_gpio,
 				GPIOF_OUT_INIT_LOW, "lcd RES");
 		if (r)
 			return r;
diff --git a/drivers/video/omap2/displays/panel-picodlp.c b/drivers/video/omap2/displays/panel-picodlp.c
index 62f2db0..875b890 100644
--- a/drivers/video/omap2/displays/panel-picodlp.c
+++ b/drivers/video/omap2/displays/panel-picodlp.c
@@ -351,7 +351,7 @@ static struct i2c_driver picodlp_i2c_driver = {
 static int picodlp_panel_power_on(struct omap_dss_device *dssdev)
 {
 	int r, trial = 100;
-	struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+	struct picodlp_data *picod = dev_get_drvdata(dssdev->dev);
 	struct picodlp_panel_data *picodlp_pdata = get_panel_data(dssdev);
 
 	gpio_set_value(picodlp_pdata->pwrgood_gpio, 0);
@@ -360,7 +360,7 @@ static int picodlp_panel_power_on(struct omap_dss_device *dssdev)
 
 	while (!gpio_get_value(picodlp_pdata->emu_done_gpio)) {
 		if (!trial--) {
-			dev_err(&dssdev->dev, "emu_done signal not"
+			dev_err(dssdev->dev, "emu_done signal not"
 						" going high\n");
 			return -ETIMEDOUT;
 		}
@@ -378,7 +378,7 @@ static int picodlp_panel_power_on(struct omap_dss_device *dssdev)
 
 	r = omapdss_dpi_display_enable(dssdev);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to enable DPI\n");
+		dev_err(dssdev->dev, "failed to enable DPI\n");
 		goto err1;
 	}
 
@@ -418,7 +418,7 @@ static int picodlp_panel_probe(struct omap_dss_device *dssdev)
 	if (!picodlp_pdata)
 		return -EINVAL;
 
-	picod = devm_kzalloc(&dssdev->dev, sizeof(*picod), GFP_KERNEL);
+	picod = devm_kzalloc(dssdev->dev, sizeof(*picod), GFP_KERNEL);
 	if (!picod)
 		return -ENOMEM;
 
@@ -428,23 +428,23 @@ static int picodlp_panel_probe(struct omap_dss_device *dssdev)
 
 	adapter = i2c_get_adapter(picodlp_adapter_id);
 	if (!adapter) {
-		dev_err(&dssdev->dev, "can't get i2c adapter\n");
+		dev_err(dssdev->dev, "can't get i2c adapter\n");
 		return -ENODEV;
 	}
 
 	picodlp_i2c_client = i2c_new_device(adapter, &picodlp_i2c_board_info);
 	if (!picodlp_i2c_client) {
-		dev_err(&dssdev->dev, "can't add i2c device::"
+		dev_err(dssdev->dev, "can't add i2c device::"
 					 " picodlp_i2c_client is NULL\n");
 		return -ENODEV;
 	}
 
 	picod->picodlp_i2c_client = picodlp_i2c_client;
 
-	dev_set_drvdata(&dssdev->dev, picod);
+	dev_set_drvdata(dssdev->dev, picod);
 
 	if (gpio_is_valid(picodlp_pdata->emu_done_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev,
+		r = devm_gpio_request_one(dssdev->dev,
 				picodlp_pdata->emu_done_gpio,
 				GPIOF_IN, "DLP EMU DONE");
 		if (r)
@@ -452,7 +452,7 @@ static int picodlp_panel_probe(struct omap_dss_device *dssdev)
 	}
 
 	if (gpio_is_valid(picodlp_pdata->pwrgood_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev,
+		r = devm_gpio_request_one(dssdev->dev,
 				picodlp_pdata->pwrgood_gpio,
 				GPIOF_OUT_INIT_LOW, "DLP PWRGOOD");
 		if (r)
@@ -464,21 +464,21 @@ static int picodlp_panel_probe(struct omap_dss_device *dssdev)
 
 static void picodlp_panel_remove(struct omap_dss_device *dssdev)
 {
-	struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+	struct picodlp_data *picod = dev_get_drvdata(dssdev->dev);
 
 	i2c_unregister_device(picod->picodlp_i2c_client);
-	dev_set_drvdata(&dssdev->dev, NULL);
-	dev_dbg(&dssdev->dev, "removing picodlp panel\n");
+	dev_set_drvdata(dssdev->dev, NULL);
+	dev_dbg(dssdev->dev, "removing picodlp panel\n");
 
 	kfree(picod);
 }
 
 static int picodlp_panel_enable(struct omap_dss_device *dssdev)
 {
-	struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+	struct picodlp_data *picod = dev_get_drvdata(dssdev->dev);
 	int r;
 
-	dev_dbg(&dssdev->dev, "enabling picodlp panel\n");
+	dev_dbg(dssdev->dev, "enabling picodlp panel\n");
 
 	mutex_lock(&picod->lock);
 	if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
@@ -494,7 +494,7 @@ static int picodlp_panel_enable(struct omap_dss_device *dssdev)
 
 static void picodlp_panel_disable(struct omap_dss_device *dssdev)
 {
-	struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+	struct picodlp_data *picod = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&picod->lock);
 	/* Turn off DLP Power */
@@ -504,7 +504,7 @@ static void picodlp_panel_disable(struct omap_dss_device *dssdev)
 	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 	mutex_unlock(&picod->lock);
 
-	dev_dbg(&dssdev->dev, "disabling picodlp panel\n");
+	dev_dbg(dssdev->dev, "disabling picodlp panel\n");
 }
 
 static void picodlp_get_resolution(struct omap_dss_device *dssdev,
diff --git a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
index 74cb0eb..78f0a67 100644
--- a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
+++ b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
@@ -66,35 +66,35 @@ static int sharp_ls_panel_probe(struct omap_dss_device *dssdev)
 	dssdev->panel.timings = sharp_ls_timings;
 
 	if (gpio_is_valid(pd->mo_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->mo_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->mo_gpio,
 				GPIOF_OUT_INIT_LOW, "lcd MO");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(pd->lr_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->lr_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->lr_gpio,
 				GPIOF_OUT_INIT_HIGH, "lcd LR");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(pd->ud_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->ud_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->ud_gpio,
 				GPIOF_OUT_INIT_HIGH, "lcd UD");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(pd->resb_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->resb_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->resb_gpio,
 				GPIOF_OUT_INIT_LOW, "lcd RESB");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(pd->ini_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->ini_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->ini_gpio,
 				GPIOF_OUT_INIT_LOW, "lcd INI");
 		if (r)
 			return r;
diff --git a/drivers/video/omap2/displays/panel-taal.c b/drivers/video/omap2/displays/panel-taal.c
index c4f78bd..c731d3c 100644
--- a/drivers/video/omap2/displays/panel-taal.c
+++ b/drivers/video/omap2/displays/panel-taal.c
@@ -237,7 +237,7 @@ static int taal_set_update_window(struct taal_data *td,
 
 static void taal_queue_esd_work(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	if (td->esd_interval > 0)
 		queue_delayed_work(td->workqueue, &td->esd_work,
@@ -246,14 +246,14 @@ static void taal_queue_esd_work(struct omap_dss_device *dssdev)
 
 static void taal_cancel_esd_work(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	cancel_delayed_work(&td->esd_work);
 }
 
 static void taal_queue_ulps_work(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	if (td->ulps_timeout > 0)
 		queue_delayed_work(td->workqueue, &td->ulps_work,
@@ -262,14 +262,14 @@ static void taal_queue_ulps_work(struct omap_dss_device *dssdev)
 
 static void taal_cancel_ulps_work(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	cancel_delayed_work(&td->ulps_work);
 }
 
 static int taal_enter_ulps(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	if (td->ulps_enabled)
@@ -291,7 +291,7 @@ static int taal_enter_ulps(struct omap_dss_device *dssdev)
 	return 0;
 
 err:
-	dev_err(&dssdev->dev, "enter ULPS failed");
+	dev_err(dssdev->dev, "enter ULPS failed");
 	taal_panel_reset(dssdev);
 
 	td->ulps_enabled = false;
@@ -303,7 +303,7 @@ err:
 
 static int taal_exit_ulps(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	if (!td->ulps_enabled)
@@ -311,7 +311,7 @@ static int taal_exit_ulps(struct omap_dss_device *dssdev)
 
 	r = omapdss_dsi_display_enable(dssdev);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to enable DSI\n");
+		dev_err(dssdev->dev, "failed to enable DSI\n");
 		goto err1;
 	}
 
@@ -319,7 +319,7 @@ static int taal_exit_ulps(struct omap_dss_device *dssdev)
 
 	r = _taal_enable_te(dssdev, true);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to re-enable TE");
+		dev_err(dssdev->dev, "failed to re-enable TE");
 		goto err2;
 	}
 
@@ -333,7 +333,7 @@ static int taal_exit_ulps(struct omap_dss_device *dssdev)
 	return 0;
 
 err2:
-	dev_err(&dssdev->dev, "failed to exit ULPS");
+	dev_err(dssdev->dev, "failed to exit ULPS");
 
 	r = taal_panel_reset(dssdev);
 	if (!r) {
@@ -349,7 +349,7 @@ err1:
 
 static int taal_wake_up(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	if (td->ulps_enabled)
 		return taal_exit_ulps(dssdev);
@@ -362,7 +362,7 @@ static int taal_wake_up(struct omap_dss_device *dssdev)
 static int taal_bl_update_status(struct backlight_device *dev)
 {
 	struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 	int level;
 
@@ -372,7 +372,7 @@ static int taal_bl_update_status(struct backlight_device *dev)
 	else
 		level = 0;
 
-	dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
+	dev_dbg(dssdev->dev, "update brightness to %d\n", level);
 
 	mutex_lock(&td->lock);
 
@@ -418,7 +418,7 @@ static ssize_t taal_num_errors_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	u8 errors = 0;
 	int r;
 
@@ -448,7 +448,7 @@ static ssize_t taal_hw_revision_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	u8 id1, id2, id3;
 	int r;
 
@@ -486,7 +486,7 @@ static ssize_t show_cabc_mode(struct device *dev,
 		char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	const char *mode_str;
 	int mode;
 	int len;
@@ -506,7 +506,7 @@ static ssize_t store_cabc_mode(struct device *dev,
 		const char *buf, size_t count)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int i;
 	int r;
 
@@ -568,7 +568,7 @@ static ssize_t taal_store_esd_interval(struct device *dev,
 		const char *buf, size_t count)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	unsigned long t;
 	int r;
@@ -592,7 +592,7 @@ static ssize_t taal_show_esd_interval(struct device *dev,
 		char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	unsigned t;
 
 	mutex_lock(&td->lock);
@@ -607,7 +607,7 @@ static ssize_t taal_store_ulps(struct device *dev,
 		const char *buf, size_t count)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	unsigned long t;
 	int r;
 
@@ -641,7 +641,7 @@ static ssize_t taal_show_ulps(struct device *dev,
 		char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	unsigned t;
 
 	mutex_lock(&td->lock);
@@ -656,7 +656,7 @@ static ssize_t taal_store_ulps_timeout(struct device *dev,
 		const char *buf, size_t count)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	unsigned long t;
 	int r;
 
@@ -687,7 +687,7 @@ static ssize_t taal_show_ulps_timeout(struct device *dev,
 		char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	unsigned t;
 
 	mutex_lock(&td->lock);
@@ -727,7 +727,7 @@ static struct attribute_group taal_attr_group = {
 
 static void taal_hw_reset(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	if (!gpio_is_valid(td->reset_gpio))
 		return;
@@ -768,13 +768,13 @@ static int taal_probe(struct omap_dss_device *dssdev)
 	struct backlight_device *bldev = NULL;
 	int r;
 
-	dev_dbg(&dssdev->dev, "probe\n");
+	dev_dbg(dssdev->dev, "probe\n");
 
-	td = devm_kzalloc(&dssdev->dev, sizeof(*td), GFP_KERNEL);
+	td = devm_kzalloc(dssdev->dev, sizeof(*td), GFP_KERNEL);
 	if (!td)
 		return -ENOMEM;
 
-	dev_set_drvdata(&dssdev->dev, td);
+	dev_set_drvdata(dssdev->dev, td);
 	td->dssdev = dssdev;
 
 	if (dssdev->data) {
@@ -797,41 +797,41 @@ static int taal_probe(struct omap_dss_device *dssdev)
 	atomic_set(&td->do_update, 0);
 
 	if (gpio_is_valid(td->reset_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, td->reset_gpio,
+		r = devm_gpio_request_one(dssdev->dev, td->reset_gpio,
 				GPIOF_OUT_INIT_LOW, "taal rst");
 		if (r) {
-			dev_err(&dssdev->dev, "failed to request reset gpio\n");
+			dev_err(dssdev->dev, "failed to request reset gpio\n");
 			return r;
 		}
 	}
 
 	if (gpio_is_valid(td->ext_te_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, td->ext_te_gpio,
+		r = devm_gpio_request_one(dssdev->dev, td->ext_te_gpio,
 				GPIOF_IN, "taal irq");
 		if (r) {
-			dev_err(&dssdev->dev, "GPIO request failed\n");
+			dev_err(dssdev->dev, "GPIO request failed\n");
 			return r;
 		}
 
-		r = devm_request_irq(&dssdev->dev, gpio_to_irq(td->ext_te_gpio),
+		r = devm_request_irq(dssdev->dev, gpio_to_irq(td->ext_te_gpio),
 				taal_te_isr,
 				IRQF_TRIGGER_RISING,
 				"taal vsync", dssdev);
 
 		if (r) {
-			dev_err(&dssdev->dev, "IRQ request failed\n");
+			dev_err(dssdev->dev, "IRQ request failed\n");
 			return r;
 		}
 
 		INIT_DEFERRABLE_WORK(&td->te_timeout_work,
 					taal_te_timeout_work_callback);
 
-		dev_dbg(&dssdev->dev, "Using GPIO TE\n");
+		dev_dbg(dssdev->dev, "Using GPIO TE\n");
 	}
 
 	td->workqueue = create_singlethread_workqueue("taal_esd");
 	if (td->workqueue = NULL) {
-		dev_err(&dssdev->dev, "can't create ESD workqueue\n");
+		dev_err(dssdev->dev, "can't create ESD workqueue\n");
 		return -ENOMEM;
 	}
 	INIT_DEFERRABLE_WORK(&td->esd_work, taal_esd_work);
@@ -844,8 +844,8 @@ static int taal_probe(struct omap_dss_device *dssdev)
 		props.max_brightness = 255;
 
 		props.type = BACKLIGHT_RAW;
-		bldev = backlight_device_register(dev_name(&dssdev->dev),
-				&dssdev->dev, dssdev, &taal_bl_ops, &props);
+		bldev = backlight_device_register(dev_name(dssdev->dev),
+				dssdev->dev, dssdev, &taal_bl_ops, &props);
 		if (IS_ERR(bldev)) {
 			r = PTR_ERR(bldev);
 			goto err_bl;
@@ -862,19 +862,19 @@ static int taal_probe(struct omap_dss_device *dssdev)
 
 	r = omap_dsi_request_vc(dssdev, &td->channel);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to get virtual channel\n");
+		dev_err(dssdev->dev, "failed to get virtual channel\n");
 		goto err_req_vc;
 	}
 
 	r = omap_dsi_set_vc_id(dssdev, td->channel, TCH);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to set VC_ID\n");
+		dev_err(dssdev->dev, "failed to set VC_ID\n");
 		goto err_vc_id;
 	}
 
-	r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
+	r = sysfs_create_group(&dssdev->dev->kobj, &taal_attr_group);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to create sysfs files\n");
+		dev_err(dssdev->dev, "failed to create sysfs files\n");
 		goto err_vc_id;
 	}
 
@@ -892,12 +892,12 @@ err_bl:
 
 static void __exit taal_remove(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	struct backlight_device *bldev;
 
-	dev_dbg(&dssdev->dev, "remove\n");
+	dev_dbg(dssdev->dev, "remove\n");
 
-	sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
+	sysfs_remove_group(&dssdev->dev->kobj, &taal_attr_group);
 	omap_dsi_release_vc(dssdev, td->channel);
 
 	bldev = td->bldev;
@@ -917,7 +917,7 @@ static void __exit taal_remove(struct omap_dss_device *dssdev)
 
 static int taal_power_on(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	u8 id1, id2, id3;
 	int r;
 	struct omap_dss_dsi_config dsi_config = {
@@ -932,19 +932,19 @@ static int taal_power_on(struct omap_dss_device *dssdev)
 
 	r = omapdss_dsi_configure_pins(dssdev, &td->pin_config);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to configure DSI pins\n");
+		dev_err(dssdev->dev, "failed to configure DSI pins\n");
 		goto err0;
 	};
 
 	r = omapdss_dsi_set_config(dssdev, &dsi_config);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to configure DSI\n");
+		dev_err(dssdev->dev, "failed to configure DSI\n");
 		goto err0;
 	}
 
 	r = omapdss_dsi_display_enable(dssdev);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to enable DSI\n");
+		dev_err(dssdev->dev, "failed to enable DSI\n");
 		goto err0;
 	}
 
@@ -999,10 +999,10 @@ static int taal_power_on(struct omap_dss_device *dssdev)
 	td->enabled = 1;
 
 	if (!td->intro_printed) {
-		dev_info(&dssdev->dev, "panel revision %02x.%02x.%02x\n",
+		dev_info(dssdev->dev, "panel revision %02x.%02x.%02x\n",
 			id1, id2, id3);
 		if (td->cabc_broken)
-			dev_info(&dssdev->dev,
+			dev_info(dssdev->dev,
 					"old Taal version, CABC disabled\n");
 		td->intro_printed = true;
 	}
@@ -1011,7 +1011,7 @@ static int taal_power_on(struct omap_dss_device *dssdev)
 
 	return 0;
 err:
-	dev_err(&dssdev->dev, "error while enabling panel, issuing HW reset\n");
+	dev_err(dssdev->dev, "error while enabling panel, issuing HW reset\n");
 
 	taal_hw_reset(dssdev);
 
@@ -1022,7 +1022,7 @@ err0:
 
 static void taal_power_off(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	dsi_disable_video_output(dssdev, td->channel);
@@ -1032,7 +1032,7 @@ static void taal_power_off(struct omap_dss_device *dssdev)
 		r = taal_sleep_in(td);
 
 	if (r) {
-		dev_err(&dssdev->dev,
+		dev_err(dssdev->dev,
 				"error disabling panel, issuing HW reset\n");
 		taal_hw_reset(dssdev);
 	}
@@ -1044,7 +1044,7 @@ static void taal_power_off(struct omap_dss_device *dssdev)
 
 static int taal_panel_reset(struct omap_dss_device *dssdev)
 {
-	dev_err(&dssdev->dev, "performing LCD reset\n");
+	dev_err(dssdev->dev, "performing LCD reset\n");
 
 	taal_power_off(dssdev);
 	taal_hw_reset(dssdev);
@@ -1053,10 +1053,10 @@ static int taal_panel_reset(struct omap_dss_device *dssdev)
 
 static int taal_enable(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
-	dev_dbg(&dssdev->dev, "enable\n");
+	dev_dbg(dssdev->dev, "enable\n");
 
 	mutex_lock(&td->lock);
 
@@ -1082,16 +1082,16 @@ static int taal_enable(struct omap_dss_device *dssdev)
 
 	return 0;
 err:
-	dev_dbg(&dssdev->dev, "enable failed\n");
+	dev_dbg(dssdev->dev, "enable failed\n");
 	mutex_unlock(&td->lock);
 	return r;
 }
 
 static void taal_disable(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
-	dev_dbg(&dssdev->dev, "disable\n");
+	dev_dbg(dssdev->dev, "disable\n");
 
 	mutex_lock(&td->lock);
 
@@ -1118,14 +1118,14 @@ static void taal_disable(struct omap_dss_device *dssdev)
 static void taal_framedone_cb(int err, void *data)
 {
 	struct omap_dss_device *dssdev = data;
-	dev_dbg(&dssdev->dev, "framedone, err %d\n", err);
+	dev_dbg(dssdev->dev, "framedone, err %d\n", err);
 	dsi_bus_unlock(dssdev);
 }
 
 static irqreturn_t taal_te_isr(int irq, void *data)
 {
 	struct omap_dss_device *dssdev = data;
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int old;
 	int r;
 
@@ -1142,7 +1142,7 @@ static irqreturn_t taal_te_isr(int irq, void *data)
 
 	return IRQ_HANDLED;
 err:
-	dev_err(&dssdev->dev, "start update failed\n");
+	dev_err(dssdev->dev, "start update failed\n");
 	dsi_bus_unlock(dssdev);
 	return IRQ_HANDLED;
 }
@@ -1153,7 +1153,7 @@ static void taal_te_timeout_work_callback(struct work_struct *work)
 					te_timeout_work.work);
 	struct omap_dss_device *dssdev = td->dssdev;
 
-	dev_err(&dssdev->dev, "TE not received for 250ms!\n");
+	dev_err(dssdev->dev, "TE not received for 250ms!\n");
 
 	atomic_set(&td->do_update, 0);
 	dsi_bus_unlock(dssdev);
@@ -1162,10 +1162,10 @@ static void taal_te_timeout_work_callback(struct work_struct *work)
 static int taal_update(struct omap_dss_device *dssdev,
 				    u16 x, u16 y, u16 w, u16 h)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
-	dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
+	dev_dbg(dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
 
 	mutex_lock(&td->lock);
 	dsi_bus_lock(dssdev);
@@ -1208,23 +1208,23 @@ err:
 
 static int taal_sync(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
-	dev_dbg(&dssdev->dev, "sync\n");
+	dev_dbg(dssdev->dev, "sync\n");
 
 	mutex_lock(&td->lock);
 	dsi_bus_lock(dssdev);
 	dsi_bus_unlock(dssdev);
 	mutex_unlock(&td->lock);
 
-	dev_dbg(&dssdev->dev, "sync done\n");
+	dev_dbg(dssdev->dev, "sync done\n");
 
 	return 0;
 }
 
 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	if (enable)
@@ -1243,7 +1243,7 @@ static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
 
 static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&td->lock);
@@ -1279,7 +1279,7 @@ err:
 
 static int taal_get_te(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&td->lock);
@@ -1291,7 +1291,7 @@ static int taal_get_te(struct omap_dss_device *dssdev)
 
 static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	u8 id1, id2, id3;
 	int r;
 
@@ -1336,7 +1336,7 @@ static int taal_memory_read(struct omap_dss_device *dssdev,
 	int first = 1;
 	int plen;
 	unsigned buf_used = 0;
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	if (size < w * h * 3)
 		return -ENOMEM;
@@ -1380,19 +1380,19 @@ static int taal_memory_read(struct omap_dss_device *dssdev,
 				buf + buf_used, size - buf_used);
 
 		if (r < 0) {
-			dev_err(&dssdev->dev, "read error\n");
+			dev_err(dssdev->dev, "read error\n");
 			goto err3;
 		}
 
 		buf_used += r;
 
 		if (r < plen) {
-			dev_err(&dssdev->dev, "short read\n");
+			dev_err(dssdev->dev, "short read\n");
 			break;
 		}
 
 		if (signal_pending(current)) {
-			dev_err(&dssdev->dev, "signal pending, "
+			dev_err(dssdev->dev, "signal pending, "
 					"aborting memory read\n");
 			r = -ERESTARTSYS;
 			goto err3;
@@ -1450,26 +1450,26 @@ static void taal_esd_work(struct work_struct *work)
 
 	r = taal_wake_up(dssdev);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to exit ULPS\n");
+		dev_err(dssdev->dev, "failed to exit ULPS\n");
 		goto err;
 	}
 
 	r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state1);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to read Taal status\n");
+		dev_err(dssdev->dev, "failed to read Taal status\n");
 		goto err;
 	}
 
 	/* Run self diagnostics */
 	r = taal_sleep_out(td);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to run Taal self-diagnostics\n");
+		dev_err(dssdev->dev, "failed to run Taal self-diagnostics\n");
 		goto err;
 	}
 
 	r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state2);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to read Taal status\n");
+		dev_err(dssdev->dev, "failed to read Taal status\n");
 		goto err;
 	}
 
@@ -1477,7 +1477,7 @@ static void taal_esd_work(struct work_struct *work)
 	 * Bit6 if the test passes.
 	 */
 	if (!((state1 ^ state2) & (1 << 6))) {
-		dev_err(&dssdev->dev, "LCD self diagnostics failed\n");
+		dev_err(dssdev->dev, "LCD self diagnostics failed\n");
 		goto err;
 	}
 	/* Self-diagnostics result is also shown on TE GPIO line. We need
@@ -1495,7 +1495,7 @@ static void taal_esd_work(struct work_struct *work)
 	mutex_unlock(&td->lock);
 	return;
 err:
-	dev_err(&dssdev->dev, "performing LCD reset\n");
+	dev_err(dssdev->dev, "performing LCD reset\n");
 
 	taal_panel_reset(dssdev);
 
diff --git a/drivers/video/omap2/displays/panel-tfp410.c b/drivers/video/omap2/displays/panel-tfp410.c
index 46039c4..1fdfb15 100644
--- a/drivers/video/omap2/displays/panel-tfp410.c
+++ b/drivers/video/omap2/displays/panel-tfp410.c
@@ -59,7 +59,7 @@ struct panel_drv_data {
 
 static int tfp410_power_on(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	if (dssdev->state = OMAP_DSS_DISPLAY_ACTIVE)
@@ -82,7 +82,7 @@ err0:
 
 static void tfp410_power_off(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 
 	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 		return;
@@ -99,7 +99,7 @@ static int tfp410_probe(struct omap_dss_device *dssdev)
 	int r;
 	int i2c_bus_num;
 
-	ddata = devm_kzalloc(&dssdev->dev, sizeof(*ddata), GFP_KERNEL);
+	ddata = devm_kzalloc(dssdev->dev, sizeof(*ddata), GFP_KERNEL);
 	if (!ddata)
 		return -ENOMEM;
 
@@ -119,10 +119,10 @@ static int tfp410_probe(struct omap_dss_device *dssdev)
 	}
 
 	if (gpio_is_valid(ddata->pd_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, ddata->pd_gpio,
+		r = devm_gpio_request_one(dssdev->dev, ddata->pd_gpio,
 				GPIOF_OUT_INIT_LOW, "tfp410 pd");
 		if (r) {
-			dev_err(&dssdev->dev, "Failed to request PD GPIO %d\n",
+			dev_err(dssdev->dev, "Failed to request PD GPIO %d\n",
 					ddata->pd_gpio);
 			return r;
 		}
@@ -133,7 +133,7 @@ static int tfp410_probe(struct omap_dss_device *dssdev)
 
 		adapter = i2c_get_adapter(i2c_bus_num);
 		if (!adapter) {
-			dev_err(&dssdev->dev, "Failed to get I2C adapter, bus %d\n",
+			dev_err(dssdev->dev, "Failed to get I2C adapter, bus %d\n",
 					i2c_bus_num);
 			return -EPROBE_DEFER;
 		}
@@ -141,28 +141,28 @@ static int tfp410_probe(struct omap_dss_device *dssdev)
 		ddata->i2c_adapter = adapter;
 	}
 
-	dev_set_drvdata(&dssdev->dev, ddata);
+	dev_set_drvdata(dssdev->dev, ddata);
 
 	return 0;
 }
 
 static void __exit tfp410_remove(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&ddata->lock);
 
 	if (ddata->i2c_adapter)
 		i2c_put_adapter(ddata->i2c_adapter);
 
-	dev_set_drvdata(&dssdev->dev, NULL);
+	dev_set_drvdata(dssdev->dev, NULL);
 
 	mutex_unlock(&ddata->lock);
 }
 
 static int tfp410_enable(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&ddata->lock);
@@ -178,7 +178,7 @@ static int tfp410_enable(struct omap_dss_device *dssdev)
 
 static void tfp410_disable(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&ddata->lock);
 
@@ -192,7 +192,7 @@ static void tfp410_disable(struct omap_dss_device *dssdev)
 static void tfp410_set_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&ddata->lock);
 	omapdss_dpi_set_timings(dssdev, timings);
@@ -203,7 +203,7 @@ static void tfp410_set_timings(struct omap_dss_device *dssdev,
 static void tfp410_get_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&ddata->lock);
 	*timings = dssdev->panel.timings;
@@ -213,7 +213,7 @@ static void tfp410_get_timings(struct omap_dss_device *dssdev,
 static int tfp410_check_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&ddata->lock);
@@ -258,7 +258,7 @@ static int tfp410_ddc_read(struct i2c_adapter *adapter,
 static int tfp410_read_edid(struct omap_dss_device *dssdev,
 		u8 *edid, int len)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 	int r, l, bytes_read;
 
 	mutex_lock(&ddata->lock);
@@ -298,7 +298,7 @@ err:
 
 static bool tfp410_detect(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 	unsigned char out;
 	int r;
 
diff --git a/drivers/video/omap2/displays/panel-tpo-td043mtea1.c b/drivers/video/omap2/displays/panel-tpo-td043mtea1.c
index abf2bc4..7729b6f 100644
--- a/drivers/video/omap2/displays/panel-tpo-td043mtea1.c
+++ b/drivers/video/omap2/displays/panel-tpo-td043mtea1.c
@@ -126,7 +126,7 @@ static int tpo_td043_write_mirror(struct spi_device *spi, bool h, bool v)
 
 static int tpo_td043_set_hmirror(struct omap_dss_device *dssdev, bool enable)
 {
-	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev);
 
 	tpo_td043->hmirror = enable;
 	return tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror,
@@ -135,7 +135,7 @@ static int tpo_td043_set_hmirror(struct omap_dss_device *dssdev, bool enable)
 
 static bool tpo_td043_get_hmirror(struct omap_dss_device *dssdev)
 {
-	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev);
 
 	return tpo_td043->hmirror;
 }
@@ -338,7 +338,7 @@ static void tpo_td043_power_off(struct tpo_td043_device *tpo_td043)
 
 static int tpo_td043_enable_dss(struct omap_dss_device *dssdev)
 {
-	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	if (dssdev->state = OMAP_DSS_DISPLAY_ACTIVE)
@@ -372,7 +372,7 @@ err0:
 
 static void tpo_td043_disable_dss(struct omap_dss_device *dssdev)
 {
-	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev);
 
 	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 		return;
@@ -385,14 +385,14 @@ static void tpo_td043_disable_dss(struct omap_dss_device *dssdev)
 
 static int tpo_td043_enable(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "enable\n");
+	dev_dbg(dssdev->dev, "enable\n");
 
 	return tpo_td043_enable_dss(dssdev);
 }
 
 static void tpo_td043_disable(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "disable\n");
+	dev_dbg(dssdev->dev, "disable\n");
 
 	tpo_td043_disable_dss(dssdev);
 
@@ -405,10 +405,10 @@ static int tpo_td043_probe(struct omap_dss_device *dssdev)
 	struct panel_tpo_td043_data *pdata = get_panel_data(dssdev);
 	int ret = 0;
 
-	dev_dbg(&dssdev->dev, "probe\n");
+	dev_dbg(dssdev->dev, "probe\n");
 
 	if (tpo_td043 = NULL) {
-		dev_err(&dssdev->dev, "missing tpo_td043_device\n");
+		dev_err(dssdev->dev, "missing tpo_td043_device\n");
 		return -ENODEV;
 	}
 
@@ -423,28 +423,28 @@ static int tpo_td043_probe(struct omap_dss_device *dssdev)
 	tpo_td043->mode = TPO_R02_MODE_800x480;
 	memcpy(tpo_td043->gamma, tpo_td043_def_gamma, sizeof(tpo_td043->gamma));
 
-	tpo_td043->vcc_reg = regulator_get(&dssdev->dev, "vcc");
+	tpo_td043->vcc_reg = regulator_get(dssdev->dev, "vcc");
 	if (IS_ERR(tpo_td043->vcc_reg)) {
-		dev_err(&dssdev->dev, "failed to get LCD VCC regulator\n");
+		dev_err(dssdev->dev, "failed to get LCD VCC regulator\n");
 		ret = PTR_ERR(tpo_td043->vcc_reg);
 		goto fail_regulator;
 	}
 
 	if (gpio_is_valid(tpo_td043->nreset_gpio)) {
-		ret = devm_gpio_request_one(&dssdev->dev,
+		ret = devm_gpio_request_one(dssdev->dev,
 				tpo_td043->nreset_gpio, GPIOF_OUT_INIT_LOW,
 				"lcd reset");
 		if (ret < 0) {
-			dev_err(&dssdev->dev, "couldn't request reset GPIO\n");
+			dev_err(dssdev->dev, "couldn't request reset GPIO\n");
 			goto fail_gpio_req;
 		}
 	}
 
-	ret = sysfs_create_group(&dssdev->dev.kobj, &tpo_td043_attr_group);
+	ret = sysfs_create_group(&dssdev->dev->kobj, &tpo_td043_attr_group);
 	if (ret)
-		dev_warn(&dssdev->dev, "failed to create sysfs files\n");
+		dev_warn(dssdev->dev, "failed to create sysfs files\n");
 
-	dev_set_drvdata(&dssdev->dev, tpo_td043);
+	dev_set_drvdata(dssdev->dev, tpo_td043);
 
 	return 0;
 
@@ -457,11 +457,11 @@ fail_regulator:
 
 static void tpo_td043_remove(struct omap_dss_device *dssdev)
 {
-	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev);
 
-	dev_dbg(&dssdev->dev, "remove\n");
+	dev_dbg(dssdev->dev, "remove\n");
 
-	sysfs_remove_group(&dssdev->dev.kobj, &tpo_td043_attr_group);
+	sysfs_remove_group(&dssdev->dev->kobj, &tpo_td043_attr_group);
 	regulator_put(tpo_td043->vcc_reg);
 }
 
diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index e88d5f0..98a688e 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -429,30 +429,32 @@ struct omap_dss_device *dss_alloc_and_init_device(struct device *parent)
 	if (!dssdev)
 		return NULL;
 
-	dssdev->dev.bus = &dss_bus_type;
-	dssdev->dev.parent = parent;
-	dssdev->dev.release = omap_dss_dev_release;
-	dev_set_name(&dssdev->dev, "display%d", disp_num_counter++);
+	dssdev->old_dev.bus = &dss_bus_type;
+	dssdev->old_dev.parent = parent;
+	dssdev->old_dev.release = omap_dss_dev_release;
+	dev_set_name(&dssdev->old_dev, "display%d", disp_num_counter++);
 
-	device_initialize(&dssdev->dev);
+	device_initialize(&dssdev->old_dev);
 
 	return dssdev;
 }
 
 int dss_add_device(struct omap_dss_device *dssdev)
 {
+	dssdev->dev = &dssdev->old_dev;
+
 	omapdss_register_display(dssdev);
-	return device_add(&dssdev->dev);
+	return device_add(&dssdev->old_dev);
 }
 
 void dss_put_device(struct omap_dss_device *dssdev)
 {
-	put_device(&dssdev->dev);
+	put_device(&dssdev->old_dev);
 }
 
 void dss_unregister_device(struct omap_dss_device *dssdev)
 {
-	device_unregister(&dssdev->dev);
+	device_unregister(&dssdev->old_dev);
 	omapdss_unregister_display(dssdev);
 }
 
diff --git a/drivers/video/omap2/dss/display-sysfs.c b/drivers/video/omap2/dss/display-sysfs.c
index 58abbaf..21d7f77 100644
--- a/drivers/video/omap2/dss/display-sysfs.c
+++ b/drivers/video/omap2/dss/display-sysfs.c
@@ -33,7 +33,7 @@ static struct omap_dss_device *to_dss_device_sysfs(struct device *dev)
 	struct omap_dss_device *dssdev = NULL;
 
 	for_each_dss_dev(dssdev) {
-		if (&dssdev->dev = dev) {
+		if (dssdev->dev = dev) {
 			omap_dss_put_device(dssdev);
 			return dssdev;
 		}
@@ -308,7 +308,7 @@ int display_init_sysfs(struct platform_device *pdev)
 	int r;
 
 	for_each_dss_dev(dssdev) {
-		struct kobject *kobj = &dssdev->dev.kobj;
+		struct kobject *kobj = &dssdev->dev->kobj;
 
 		r = sysfs_create_files(kobj, display_sysfs_attrs);
 		if (r) {
@@ -339,6 +339,7 @@ void display_uninit_sysfs(struct platform_device *pdev)
 
 	for_each_dss_dev(dssdev) {
 		sysfs_remove_link(&pdev->dev.kobj, dssdev->alias);
-		sysfs_remove_files(&dssdev->dev.kobj, display_sysfs_attrs);
+		sysfs_remove_files(&dssdev->dev->kobj,
+				display_sysfs_attrs);
 	}
 }
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index dfe3322..a9a1d55 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -160,13 +160,13 @@ EXPORT_SYMBOL(omapdss_unregister_display);
 
 void omap_dss_get_device(struct omap_dss_device *dssdev)
 {
-	get_device(&dssdev->dev);
+	get_device(dssdev->dev);
 }
 EXPORT_SYMBOL(omap_dss_get_device);
 
 void omap_dss_put_device(struct omap_dss_device *dssdev)
 {
-	put_device(&dssdev->dev);
+	put_device(dssdev->dev);
 }
 EXPORT_SYMBOL(omap_dss_put_device);
 
@@ -240,9 +240,8 @@ int omap_dss_start_device(struct omap_dss_device *dssdev)
 		return -ENODEV;
 	}
 
-	if (!try_module_get(dssdev->dev.driver->owner)) {
+	if (!try_module_get(dssdev->dev->driver->owner))
 		return -ENODEV;
-	}
 
 	return 0;
 }
@@ -250,7 +249,7 @@ EXPORT_SYMBOL(omap_dss_start_device);
 
 void omap_dss_stop_device(struct omap_dss_device *dssdev)
 {
-	module_put(dssdev->dev.driver->owner);
+	module_put(dssdev->dev->driver->owner);
 }
 EXPORT_SYMBOL(omap_dss_stop_device);
 
diff --git a/drivers/video/omap2/dss/venc_panel.c b/drivers/video/omap2/dss/venc_panel.c
index 0d2b1a0..f7d92c5 100644
--- a/drivers/video/omap2/dss/venc_panel.c
+++ b/drivers/video/omap2/dss/venc_panel.c
@@ -107,19 +107,19 @@ static int venc_panel_probe(struct omap_dss_device *dssdev)
 
 	dssdev->panel.timings = default_timings;
 
-	return device_create_file(&dssdev->dev, &dev_attr_output_type);
+	return device_create_file(dssdev->dev, &dev_attr_output_type);
 }
 
 static void venc_panel_remove(struct omap_dss_device *dssdev)
 {
-	device_remove_file(&dssdev->dev, &dev_attr_output_type);
+	device_remove_file(dssdev->dev, &dev_attr_output_type);
 }
 
 static int venc_panel_enable(struct omap_dss_device *dssdev)
 {
 	int r;
 
-	dev_dbg(&dssdev->dev, "venc_panel_enable\n");
+	dev_dbg(dssdev->dev, "venc_panel_enable\n");
 
 	mutex_lock(&venc_panel.lock);
 
@@ -150,7 +150,7 @@ err:
 
 static void venc_panel_disable(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "venc_panel_disable\n");
+	dev_dbg(dssdev->dev, "venc_panel_disable\n");
 
 	mutex_lock(&venc_panel.lock);
 
@@ -167,7 +167,7 @@ end:
 static void venc_panel_set_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	dev_dbg(&dssdev->dev, "venc_panel_set_timings\n");
+	dev_dbg(dssdev->dev, "venc_panel_set_timings\n");
 
 	mutex_lock(&venc_panel.lock);
 
@@ -180,21 +180,21 @@ static void venc_panel_set_timings(struct omap_dss_device *dssdev,
 static int venc_panel_check_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	dev_dbg(&dssdev->dev, "venc_panel_check_timings\n");
+	dev_dbg(dssdev->dev, "venc_panel_check_timings\n");
 
 	return omapdss_venc_check_timings(dssdev, timings);
 }
 
 static u32 venc_panel_get_wss(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "venc_panel_get_wss\n");
+	dev_dbg(dssdev->dev, "venc_panel_get_wss\n");
 
 	return omapdss_venc_get_wss(dssdev);
 }
 
 static int venc_panel_set_wss(struct omap_dss_device *dssdev, u32 wss)
 {
-	dev_dbg(&dssdev->dev, "venc_panel_set_wss\n");
+	dev_dbg(dssdev->dev, "venc_panel_set_wss\n");
 
 	return omapdss_venc_set_wss(dssdev, wss);
 }
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index b19a8d2..f8e0e64 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -596,7 +596,11 @@ struct omap_dss_output {
 };
 
 struct omap_dss_device {
-	struct device dev;
+	/* old device, to be removed */
+	struct device old_dev;
+
+	/* new device, pointer to panel device */
+	struct device *dev;
 
 	struct list_head panel_list;
 
@@ -855,7 +859,7 @@ int dispc_ovl_setup(enum omap_plane plane, const struct omap_overlay_info *oi,
 		bool mem_to_mem);
 
 #define to_dss_driver(x) container_of((x), struct omap_dss_driver, driver)
-#define to_dss_device(x) container_of((x), struct omap_dss_device, dev)
+#define to_dss_device(x) container_of((x), struct omap_dss_device, old_dev)
 
 void omapdss_dsi_vc_enable_hs(struct omap_dss_device *dssdev, int channel,
 		bool enable);
-- 
1.8.1.2

[PATCH 25/32] OMAPDSS: Add panel dev pointer to dssdev

[Tomi Valkeinen]

We are about to remove the dss bus support, which also means that the
omap_dss_device won't be a real device anymore. This means that the
embedded "dev" struct needs to be removed from omap_dss_device.

After we've finished the removal of the dss bus, we see the following
changes:

- struct omap_dss_device won't be a real Linux device anymore, but more
  like a "display entity".
- struct omap_dss_driver won't be a Linux device driver, but "display
  entity ops".
- The panel devices/drivers won't be omapdss devices/drivers, but
  platform/i2c/spi/etc devices/drivers, whichever fits the control
  mechanism of the panel.
- The panel drivers will create omap_dss_device and omap_dss_driver,
  fill the required fields, and register the omap_dss_device to
  omapdss.
- omap_dss_device won't have an embedded dev struct anymore, but a
  dev pointer to the actual device that manages the omap_dss_device.

The model described above resembles the model that has been discussed
with CDF (common display framework).

For the duration of the conversion, we temporarily have two devs in the
dssdev, the old "old_dev", which is a full embedded device struct, and the
new "dev", which is a pointer to the device. "old_dev" will be removed
in the future.

For devices belonging to dss bus the dev is initialized to point to
old_dev. This way all the code can just use the dev, for both old and
new style panels.

Both the new and old style panel drivers work during the conversion, and
only after the dss bus support is removed will the old style panels stop
to compile.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/displays/panel-acx565akm.c     |  16 +-
 drivers/video/omap2/displays/panel-generic-dpi.c   |  26 ++--
 .../omap2/displays/panel-lgphilips-lb035q02.c      |  10 +-
 drivers/video/omap2/displays/panel-n8x0.c          |  30 ++--
 .../omap2/displays/panel-nec-nl8048hl11-01b.c      |   4 +-
 drivers/video/omap2/displays/panel-picodlp.c       |  32 ++--
 .../video/omap2/displays/panel-sharp-ls037v7dw01.c |  10 +-
 drivers/video/omap2/displays/panel-taal.c          | 164 ++++++++++-----------
 drivers/video/omap2/displays/panel-tfp410.c        |  32 ++--
 .../video/omap2/displays/panel-tpo-td043mtea1.c    |  36 ++---
 drivers/video/omap2/dss/core.c                     |  18 ++-
 drivers/video/omap2/dss/display-sysfs.c            |   7 +-
 drivers/video/omap2/dss/display.c                  |   9 +-
 drivers/video/omap2/dss/venc_panel.c               |  16 +-
 include/video/omapdss.h                            |   8 +-
 15 files changed, 212 insertions(+), 206 deletions(-)

diff --git a/drivers/video/omap2/displays/panel-acx565akm.c b/drivers/video/omap2/displays/panel-acx565akm.c
index d7f69c0..3fd100f 100644
--- a/drivers/video/omap2/displays/panel-acx565akm.c
+++ b/drivers/video/omap2/displays/panel-acx565akm.c
@@ -510,7 +510,7 @@ static int acx_panel_probe(struct omap_dss_device *dssdev)
 	int max_brightness, brightness;
 	struct backlight_properties props;
 
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 
 	if (!panel_data)
 		return -EINVAL;
@@ -519,7 +519,7 @@ static int acx_panel_probe(struct omap_dss_device *dssdev)
 	dssdev->panel.timings = acx_panel_timings;
 
 	if (gpio_is_valid(panel_data->reset_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, panel_data->reset_gpio,
+		r = devm_gpio_request_one(dssdev->dev, panel_data->reset_gpio,
 				GPIOF_OUT_INIT_LOW, "lcd reset");
 		if (r)
 			return r;
@@ -538,7 +538,7 @@ static int acx_panel_probe(struct omap_dss_device *dssdev)
 
 	r = panel_detect(md);
 	if (r) {
-		dev_err(&dssdev->dev, "%s panel detect error\n", __func__);
+		dev_err(dssdev->dev, "%s panel detect error\n", __func__);
 		if (!md->enabled && gpio_is_valid(panel_data->reset_gpio))
 			gpio_set_value(panel_data->reset_gpio, 0);
 
@@ -593,7 +593,7 @@ static void acx_panel_remove(struct omap_dss_device *dssdev)
 {
 	struct acx565akm_device *md = &acx_dev;
 
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 	sysfs_remove_group(&md->bl_dev->dev.kobj, &bldev_attr_group);
 	backlight_device_unregister(md->bl_dev);
 	mutex_lock(&acx_dev.mutex);
@@ -607,7 +607,7 @@ static int acx_panel_power_on(struct omap_dss_device *dssdev)
 	struct panel_acx565akm_data *panel_data = get_panel_data(dssdev);
 	int r;
 
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 
 	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
 		return 0;
@@ -667,7 +667,7 @@ static void acx_panel_power_off(struct omap_dss_device *dssdev)
 	struct acx565akm_device *md = &acx_dev;
 	struct panel_acx565akm_data *panel_data = get_panel_data(dssdev);
 
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 
 	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 		return;
@@ -704,7 +704,7 @@ static int acx_panel_enable(struct omap_dss_device *dssdev)
 {
 	int r;
 
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 	r = acx_panel_power_on(dssdev);
 
 	if (r)
@@ -716,7 +716,7 @@ static int acx_panel_enable(struct omap_dss_device *dssdev)
 
 static void acx_panel_disable(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dev_dbg(dssdev->dev, "%s\n", __func__);
 	acx_panel_power_off(dssdev);
 	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 }
diff --git a/drivers/video/omap2/displays/panel-generic-dpi.c b/drivers/video/omap2/displays/panel-generic-dpi.c
index 97363f7..bebebd4 100644
--- a/drivers/video/omap2/displays/panel-generic-dpi.c
+++ b/drivers/video/omap2/displays/panel-generic-dpi.c
@@ -536,7 +536,7 @@ static int generic_dpi_panel_power_on(struct omap_dss_device *dssdev)
 {
 	int r, i;
 	struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 	struct panel_config *panel_config = drv_data->panel_config;
 
 	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
@@ -567,7 +567,7 @@ err0:
 static void generic_dpi_panel_power_off(struct omap_dss_device *dssdev)
 {
 	struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 	struct panel_config *panel_config = drv_data->panel_config;
 	int i;
 
@@ -593,7 +593,7 @@ static int generic_dpi_panel_probe(struct omap_dss_device *dssdev)
 	struct panel_drv_data *drv_data = NULL;
 	int i, r;
 
-	dev_dbg(&dssdev->dev, "probe\n");
+	dev_dbg(dssdev->dev, "probe\n");
 
 	if (!panel_data || !panel_data->name)
 		return -EINVAL;
@@ -609,7 +609,7 @@ static int generic_dpi_panel_probe(struct omap_dss_device *dssdev)
 		return -EINVAL;
 
 	for (i = 0; i < panel_data->num_gpios; ++i) {
-		r = devm_gpio_request_one(&dssdev->dev, panel_data->gpios[i],
+		r = devm_gpio_request_one(dssdev->dev, panel_data->gpios[i],
 				panel_data->gpio_invert[i] ?
 				GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
 				"panel gpio");
@@ -619,7 +619,7 @@ static int generic_dpi_panel_probe(struct omap_dss_device *dssdev)
 
 	dssdev->panel.timings = panel_config->timings;
 
-	drv_data = devm_kzalloc(&dssdev->dev, sizeof(*drv_data), GFP_KERNEL);
+	drv_data = devm_kzalloc(dssdev->dev, sizeof(*drv_data), GFP_KERNEL);
 	if (!drv_data)
 		return -ENOMEM;
 
@@ -628,21 +628,21 @@ static int generic_dpi_panel_probe(struct omap_dss_device *dssdev)
 
 	mutex_init(&drv_data->lock);
 
-	dev_set_drvdata(&dssdev->dev, drv_data);
+	dev_set_drvdata(dssdev->dev, drv_data);
 
 	return 0;
 }
 
 static void __exit generic_dpi_panel_remove(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "remove\n");
+	dev_dbg(dssdev->dev, "remove\n");
 
-	dev_set_drvdata(&dssdev->dev, NULL);
+	dev_set_drvdata(dssdev->dev, NULL);
 }
 
 static int generic_dpi_panel_enable(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&drv_data->lock);
@@ -660,7 +660,7 @@ err:
 
 static void generic_dpi_panel_disable(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&drv_data->lock);
 
@@ -674,7 +674,7 @@ static void generic_dpi_panel_disable(struct omap_dss_device *dssdev)
 static void generic_dpi_panel_set_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&drv_data->lock);
 
@@ -688,7 +688,7 @@ static void generic_dpi_panel_set_timings(struct omap_dss_device *dssdev,
 static void generic_dpi_panel_get_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&drv_data->lock);
 
@@ -700,7 +700,7 @@ static void generic_dpi_panel_get_timings(struct omap_dss_device *dssdev,
 static int generic_dpi_panel_check_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *drv_data = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&drv_data->lock);
diff --git a/drivers/video/omap2/displays/panel-lgphilips-lb035q02.c b/drivers/video/omap2/displays/panel-lgphilips-lb035q02.c
index 4ea6548..6c51430 100644
--- a/drivers/video/omap2/displays/panel-lgphilips-lb035q02.c
+++ b/drivers/video/omap2/displays/panel-lgphilips-lb035q02.c
@@ -109,12 +109,12 @@ static int lb035q02_panel_probe(struct omap_dss_device *dssdev)
 
 	dssdev->panel.timings = lb035q02_timings;
 
-	ld = devm_kzalloc(&dssdev->dev, sizeof(*ld), GFP_KERNEL);
+	ld = devm_kzalloc(dssdev->dev, sizeof(*ld), GFP_KERNEL);
 	if (!ld)
 		return -ENOMEM;
 
 	for (i = 0; i < panel_data->num_gpios; ++i) {
-		r = devm_gpio_request_one(&dssdev->dev, panel_data->gpios[i],
+		r = devm_gpio_request_one(dssdev->dev, panel_data->gpios[i],
 				panel_data->gpio_invert[i] ?
 				GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
 				"panel gpio");
@@ -123,7 +123,7 @@ static int lb035q02_panel_probe(struct omap_dss_device *dssdev)
 	}
 
 	mutex_init(&ld->lock);
-	dev_set_drvdata(&dssdev->dev, ld);
+	dev_set_drvdata(dssdev->dev, ld);
 
 	return 0;
 }
@@ -134,7 +134,7 @@ static void lb035q02_panel_remove(struct omap_dss_device *dssdev)
 
 static int lb035q02_panel_enable(struct omap_dss_device *dssdev)
 {
-	struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
+	struct lb035q02_data *ld = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&ld->lock);
@@ -153,7 +153,7 @@ err:
 
 static void lb035q02_panel_disable(struct omap_dss_device *dssdev)
 {
-	struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
+	struct lb035q02_data *ld = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&ld->lock);
 
diff --git a/drivers/video/omap2/displays/panel-n8x0.c b/drivers/video/omap2/displays/panel-n8x0.c
index f94ead6..d3860c5 100644
--- a/drivers/video/omap2/displays/panel-n8x0.c
+++ b/drivers/video/omap2/displays/panel-n8x0.c
@@ -311,16 +311,16 @@ static int n8x0_panel_power_on(struct omap_dss_device *dssdev)
 	switch (rev & 0xfc) {
 	case 0x9c:
 		ddata->blizzard_ver = BLIZZARD_VERSION_S1D13744;
-		dev_info(&dssdev->dev, "s1d13744 LCD controller rev %d "
+		dev_info(dssdev->dev, "s1d13744 LCD controller rev %d "
 			"initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
 		break;
 	case 0xa4:
 		ddata->blizzard_ver = BLIZZARD_VERSION_S1D13745;
-		dev_info(&dssdev->dev, "s1d13745 LCD controller rev %d "
+		dev_info(dssdev->dev, "s1d13745 LCD controller rev %d "
 			"initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
 		break;
 	default:
-		dev_err(&dssdev->dev, "invalid s1d1374x revision %02x\n", rev);
+		dev_err(dssdev->dev, "invalid s1d1374x revision %02x\n", rev);
 		r = -ENODEV;
 		goto err_inv_chip;
 	}
@@ -341,13 +341,13 @@ static int n8x0_panel_power_on(struct omap_dss_device *dssdev)
 		panel_name = "ls041y3";
 		break;
 	default:
-		dev_err(&dssdev->dev, "invalid display ID 0x%x\n",
+		dev_err(dssdev->dev, "invalid display ID 0x%x\n",
 				display_id[0]);
 		r = -ENODEV;
 		goto err_inv_panel;
 	}
 
-	dev_info(&dssdev->dev, "%s rev %02x LCD detected\n",
+	dev_info(dssdev->dev, "%s rev %02x LCD detected\n",
 			panel_name, display_id[1]);
 
 	send_sleep_out(spi);
@@ -416,7 +416,7 @@ static int n8x0_panel_probe(struct omap_dss_device *dssdev)
 	struct panel_drv_data *ddata;
 	int r;
 
-	dev_dbg(&dssdev->dev, "probe\n");
+	dev_dbg(dssdev->dev, "probe\n");
 
 	if (!bdata)
 		return -EINVAL;
@@ -434,14 +434,14 @@ static int n8x0_panel_probe(struct omap_dss_device *dssdev)
 	dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE;
 
 	if (gpio_is_valid(bdata->panel_reset)) {
-		r = devm_gpio_request_one(&dssdev->dev, bdata->panel_reset,
+		r = devm_gpio_request_one(dssdev->dev, bdata->panel_reset,
 				GPIOF_OUT_INIT_LOW, "PANEL RESET");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(bdata->ctrl_pwrdown)) {
-		r = devm_gpio_request_one(&dssdev->dev, bdata->ctrl_pwrdown,
+		r = devm_gpio_request_one(dssdev->dev, bdata->ctrl_pwrdown,
 				GPIOF_OUT_INIT_LOW, "PANEL PWRDOWN");
 		if (r)
 			return r;
@@ -452,9 +452,9 @@ static int n8x0_panel_probe(struct omap_dss_device *dssdev)
 
 static void n8x0_panel_remove(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "remove\n");
+	dev_dbg(dssdev->dev, "remove\n");
 
-	dev_set_drvdata(&dssdev->dev, NULL);
+	dev_set_drvdata(dssdev->dev, NULL);
 }
 
 static int n8x0_panel_enable(struct omap_dss_device *dssdev)
@@ -462,7 +462,7 @@ static int n8x0_panel_enable(struct omap_dss_device *dssdev)
 	struct panel_drv_data *ddata = get_drv_data(dssdev);
 	int r;
 
-	dev_dbg(&dssdev->dev, "enable\n");
+	dev_dbg(dssdev->dev, "enable\n");
 
 	mutex_lock(&ddata->lock);
 
@@ -488,7 +488,7 @@ static void n8x0_panel_disable(struct omap_dss_device *dssdev)
 {
 	struct panel_drv_data *ddata = get_drv_data(dssdev);
 
-	dev_dbg(&dssdev->dev, "disable\n");
+	dev_dbg(dssdev->dev, "disable\n");
 
 	mutex_lock(&ddata->lock);
 
@@ -521,13 +521,13 @@ static int n8x0_panel_update(struct omap_dss_device *dssdev,
 	struct panel_drv_data *ddata = get_drv_data(dssdev);
 	u16 dw, dh;
 
-	dev_dbg(&dssdev->dev, "update\n");
+	dev_dbg(dssdev->dev, "update\n");
 
 	dw = dssdev->panel.timings.x_res;
 	dh = dssdev->panel.timings.y_res;
 
 	if (x != 0 || y != 0 || w != dw || h != dh) {
-		dev_err(&dssdev->dev, "invaid update region %d, %d, %d, %d\n",
+		dev_err(dssdev->dev, "invaid update region %d, %d, %d, %d\n",
 			x, y, w, h);
 		return -EINVAL;
 	}
@@ -548,7 +548,7 @@ static int n8x0_panel_sync(struct omap_dss_device *dssdev)
 {
 	struct panel_drv_data *ddata = get_drv_data(dssdev);
 
-	dev_dbg(&dssdev->dev, "sync\n");
+	dev_dbg(dssdev->dev, "sync\n");
 
 	mutex_lock(&ddata->lock);
 	rfbi_bus_lock();
diff --git a/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c b/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
index 20c3cd9..6b9f792 100644
--- a/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
+++ b/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
@@ -98,14 +98,14 @@ static int nec_8048_panel_probe(struct omap_dss_device *dssdev)
 	dssdev->panel.timings = nec_8048_panel_timings;
 
 	if (gpio_is_valid(pd->qvga_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->qvga_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->qvga_gpio,
 				GPIOF_OUT_INIT_HIGH, "lcd QVGA");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(pd->res_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->res_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->res_gpio,
 				GPIOF_OUT_INIT_LOW, "lcd RES");
 		if (r)
 			return r;
diff --git a/drivers/video/omap2/displays/panel-picodlp.c b/drivers/video/omap2/displays/panel-picodlp.c
index 62f2db0..875b890 100644
--- a/drivers/video/omap2/displays/panel-picodlp.c
+++ b/drivers/video/omap2/displays/panel-picodlp.c
@@ -351,7 +351,7 @@ static struct i2c_driver picodlp_i2c_driver = {
 static int picodlp_panel_power_on(struct omap_dss_device *dssdev)
 {
 	int r, trial = 100;
-	struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+	struct picodlp_data *picod = dev_get_drvdata(dssdev->dev);
 	struct picodlp_panel_data *picodlp_pdata = get_panel_data(dssdev);
 
 	gpio_set_value(picodlp_pdata->pwrgood_gpio, 0);
@@ -360,7 +360,7 @@ static int picodlp_panel_power_on(struct omap_dss_device *dssdev)
 
 	while (!gpio_get_value(picodlp_pdata->emu_done_gpio)) {
 		if (!trial--) {
-			dev_err(&dssdev->dev, "emu_done signal not"
+			dev_err(dssdev->dev, "emu_done signal not"
 						" going high\n");
 			return -ETIMEDOUT;
 		}
@@ -378,7 +378,7 @@ static int picodlp_panel_power_on(struct omap_dss_device *dssdev)
 
 	r = omapdss_dpi_display_enable(dssdev);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to enable DPI\n");
+		dev_err(dssdev->dev, "failed to enable DPI\n");
 		goto err1;
 	}
 
@@ -418,7 +418,7 @@ static int picodlp_panel_probe(struct omap_dss_device *dssdev)
 	if (!picodlp_pdata)
 		return -EINVAL;
 
-	picod = devm_kzalloc(&dssdev->dev, sizeof(*picod), GFP_KERNEL);
+	picod = devm_kzalloc(dssdev->dev, sizeof(*picod), GFP_KERNEL);
 	if (!picod)
 		return -ENOMEM;
 
@@ -428,23 +428,23 @@ static int picodlp_panel_probe(struct omap_dss_device *dssdev)
 
 	adapter = i2c_get_adapter(picodlp_adapter_id);
 	if (!adapter) {
-		dev_err(&dssdev->dev, "can't get i2c adapter\n");
+		dev_err(dssdev->dev, "can't get i2c adapter\n");
 		return -ENODEV;
 	}
 
 	picodlp_i2c_client = i2c_new_device(adapter, &picodlp_i2c_board_info);
 	if (!picodlp_i2c_client) {
-		dev_err(&dssdev->dev, "can't add i2c device::"
+		dev_err(dssdev->dev, "can't add i2c device::"
 					 " picodlp_i2c_client is NULL\n");
 		return -ENODEV;
 	}
 
 	picod->picodlp_i2c_client = picodlp_i2c_client;
 
-	dev_set_drvdata(&dssdev->dev, picod);
+	dev_set_drvdata(dssdev->dev, picod);
 
 	if (gpio_is_valid(picodlp_pdata->emu_done_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev,
+		r = devm_gpio_request_one(dssdev->dev,
 				picodlp_pdata->emu_done_gpio,
 				GPIOF_IN, "DLP EMU DONE");
 		if (r)
@@ -452,7 +452,7 @@ static int picodlp_panel_probe(struct omap_dss_device *dssdev)
 	}
 
 	if (gpio_is_valid(picodlp_pdata->pwrgood_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev,
+		r = devm_gpio_request_one(dssdev->dev,
 				picodlp_pdata->pwrgood_gpio,
 				GPIOF_OUT_INIT_LOW, "DLP PWRGOOD");
 		if (r)
@@ -464,21 +464,21 @@ static int picodlp_panel_probe(struct omap_dss_device *dssdev)
 
 static void picodlp_panel_remove(struct omap_dss_device *dssdev)
 {
-	struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+	struct picodlp_data *picod = dev_get_drvdata(dssdev->dev);
 
 	i2c_unregister_device(picod->picodlp_i2c_client);
-	dev_set_drvdata(&dssdev->dev, NULL);
-	dev_dbg(&dssdev->dev, "removing picodlp panel\n");
+	dev_set_drvdata(dssdev->dev, NULL);
+	dev_dbg(dssdev->dev, "removing picodlp panel\n");
 
 	kfree(picod);
 }
 
 static int picodlp_panel_enable(struct omap_dss_device *dssdev)
 {
-	struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+	struct picodlp_data *picod = dev_get_drvdata(dssdev->dev);
 	int r;
 
-	dev_dbg(&dssdev->dev, "enabling picodlp panel\n");
+	dev_dbg(dssdev->dev, "enabling picodlp panel\n");
 
 	mutex_lock(&picod->lock);
 	if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
@@ -494,7 +494,7 @@ static int picodlp_panel_enable(struct omap_dss_device *dssdev)
 
 static void picodlp_panel_disable(struct omap_dss_device *dssdev)
 {
-	struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+	struct picodlp_data *picod = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&picod->lock);
 	/* Turn off DLP Power */
@@ -504,7 +504,7 @@ static void picodlp_panel_disable(struct omap_dss_device *dssdev)
 	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 	mutex_unlock(&picod->lock);
 
-	dev_dbg(&dssdev->dev, "disabling picodlp panel\n");
+	dev_dbg(dssdev->dev, "disabling picodlp panel\n");
 }
 
 static void picodlp_get_resolution(struct omap_dss_device *dssdev,
diff --git a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
index 74cb0eb..78f0a67 100644
--- a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
+++ b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
@@ -66,35 +66,35 @@ static int sharp_ls_panel_probe(struct omap_dss_device *dssdev)
 	dssdev->panel.timings = sharp_ls_timings;
 
 	if (gpio_is_valid(pd->mo_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->mo_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->mo_gpio,
 				GPIOF_OUT_INIT_LOW, "lcd MO");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(pd->lr_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->lr_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->lr_gpio,
 				GPIOF_OUT_INIT_HIGH, "lcd LR");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(pd->ud_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->ud_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->ud_gpio,
 				GPIOF_OUT_INIT_HIGH, "lcd UD");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(pd->resb_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->resb_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->resb_gpio,
 				GPIOF_OUT_INIT_LOW, "lcd RESB");
 		if (r)
 			return r;
 	}
 
 	if (gpio_is_valid(pd->ini_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, pd->ini_gpio,
+		r = devm_gpio_request_one(dssdev->dev, pd->ini_gpio,
 				GPIOF_OUT_INIT_LOW, "lcd INI");
 		if (r)
 			return r;
diff --git a/drivers/video/omap2/displays/panel-taal.c b/drivers/video/omap2/displays/panel-taal.c
index c4f78bd..c731d3c 100644
--- a/drivers/video/omap2/displays/panel-taal.c
+++ b/drivers/video/omap2/displays/panel-taal.c
@@ -237,7 +237,7 @@ static int taal_set_update_window(struct taal_data *td,
 
 static void taal_queue_esd_work(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	if (td->esd_interval > 0)
 		queue_delayed_work(td->workqueue, &td->esd_work,
@@ -246,14 +246,14 @@ static void taal_queue_esd_work(struct omap_dss_device *dssdev)
 
 static void taal_cancel_esd_work(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	cancel_delayed_work(&td->esd_work);
 }
 
 static void taal_queue_ulps_work(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	if (td->ulps_timeout > 0)
 		queue_delayed_work(td->workqueue, &td->ulps_work,
@@ -262,14 +262,14 @@ static void taal_queue_ulps_work(struct omap_dss_device *dssdev)
 
 static void taal_cancel_ulps_work(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	cancel_delayed_work(&td->ulps_work);
 }
 
 static int taal_enter_ulps(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	if (td->ulps_enabled)
@@ -291,7 +291,7 @@ static int taal_enter_ulps(struct omap_dss_device *dssdev)
 	return 0;
 
 err:
-	dev_err(&dssdev->dev, "enter ULPS failed");
+	dev_err(dssdev->dev, "enter ULPS failed");
 	taal_panel_reset(dssdev);
 
 	td->ulps_enabled = false;
@@ -303,7 +303,7 @@ err:
 
 static int taal_exit_ulps(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	if (!td->ulps_enabled)
@@ -311,7 +311,7 @@ static int taal_exit_ulps(struct omap_dss_device *dssdev)
 
 	r = omapdss_dsi_display_enable(dssdev);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to enable DSI\n");
+		dev_err(dssdev->dev, "failed to enable DSI\n");
 		goto err1;
 	}
 
@@ -319,7 +319,7 @@ static int taal_exit_ulps(struct omap_dss_device *dssdev)
 
 	r = _taal_enable_te(dssdev, true);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to re-enable TE");
+		dev_err(dssdev->dev, "failed to re-enable TE");
 		goto err2;
 	}
 
@@ -333,7 +333,7 @@ static int taal_exit_ulps(struct omap_dss_device *dssdev)
 	return 0;
 
 err2:
-	dev_err(&dssdev->dev, "failed to exit ULPS");
+	dev_err(dssdev->dev, "failed to exit ULPS");
 
 	r = taal_panel_reset(dssdev);
 	if (!r) {
@@ -349,7 +349,7 @@ err1:
 
 static int taal_wake_up(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	if (td->ulps_enabled)
 		return taal_exit_ulps(dssdev);
@@ -362,7 +362,7 @@ static int taal_wake_up(struct omap_dss_device *dssdev)
 static int taal_bl_update_status(struct backlight_device *dev)
 {
 	struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 	int level;
 
@@ -372,7 +372,7 @@ static int taal_bl_update_status(struct backlight_device *dev)
 	else
 		level = 0;
 
-	dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
+	dev_dbg(dssdev->dev, "update brightness to %d\n", level);
 
 	mutex_lock(&td->lock);
 
@@ -418,7 +418,7 @@ static ssize_t taal_num_errors_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	u8 errors = 0;
 	int r;
 
@@ -448,7 +448,7 @@ static ssize_t taal_hw_revision_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	u8 id1, id2, id3;
 	int r;
 
@@ -486,7 +486,7 @@ static ssize_t show_cabc_mode(struct device *dev,
 		char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	const char *mode_str;
 	int mode;
 	int len;
@@ -506,7 +506,7 @@ static ssize_t store_cabc_mode(struct device *dev,
 		const char *buf, size_t count)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int i;
 	int r;
 
@@ -568,7 +568,7 @@ static ssize_t taal_store_esd_interval(struct device *dev,
 		const char *buf, size_t count)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	unsigned long t;
 	int r;
@@ -592,7 +592,7 @@ static ssize_t taal_show_esd_interval(struct device *dev,
 		char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	unsigned t;
 
 	mutex_lock(&td->lock);
@@ -607,7 +607,7 @@ static ssize_t taal_store_ulps(struct device *dev,
 		const char *buf, size_t count)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	unsigned long t;
 	int r;
 
@@ -641,7 +641,7 @@ static ssize_t taal_show_ulps(struct device *dev,
 		char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	unsigned t;
 
 	mutex_lock(&td->lock);
@@ -656,7 +656,7 @@ static ssize_t taal_store_ulps_timeout(struct device *dev,
 		const char *buf, size_t count)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	unsigned long t;
 	int r;
 
@@ -687,7 +687,7 @@ static ssize_t taal_show_ulps_timeout(struct device *dev,
 		char *buf)
 {
 	struct omap_dss_device *dssdev = to_dss_device(dev);
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	unsigned t;
 
 	mutex_lock(&td->lock);
@@ -727,7 +727,7 @@ static struct attribute_group taal_attr_group = {
 
 static void taal_hw_reset(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	if (!gpio_is_valid(td->reset_gpio))
 		return;
@@ -768,13 +768,13 @@ static int taal_probe(struct omap_dss_device *dssdev)
 	struct backlight_device *bldev = NULL;
 	int r;
 
-	dev_dbg(&dssdev->dev, "probe\n");
+	dev_dbg(dssdev->dev, "probe\n");
 
-	td = devm_kzalloc(&dssdev->dev, sizeof(*td), GFP_KERNEL);
+	td = devm_kzalloc(dssdev->dev, sizeof(*td), GFP_KERNEL);
 	if (!td)
 		return -ENOMEM;
 
-	dev_set_drvdata(&dssdev->dev, td);
+	dev_set_drvdata(dssdev->dev, td);
 	td->dssdev = dssdev;
 
 	if (dssdev->data) {
@@ -797,41 +797,41 @@ static int taal_probe(struct omap_dss_device *dssdev)
 	atomic_set(&td->do_update, 0);
 
 	if (gpio_is_valid(td->reset_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, td->reset_gpio,
+		r = devm_gpio_request_one(dssdev->dev, td->reset_gpio,
 				GPIOF_OUT_INIT_LOW, "taal rst");
 		if (r) {
-			dev_err(&dssdev->dev, "failed to request reset gpio\n");
+			dev_err(dssdev->dev, "failed to request reset gpio\n");
 			return r;
 		}
 	}
 
 	if (gpio_is_valid(td->ext_te_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, td->ext_te_gpio,
+		r = devm_gpio_request_one(dssdev->dev, td->ext_te_gpio,
 				GPIOF_IN, "taal irq");
 		if (r) {
-			dev_err(&dssdev->dev, "GPIO request failed\n");
+			dev_err(dssdev->dev, "GPIO request failed\n");
 			return r;
 		}
 
-		r = devm_request_irq(&dssdev->dev, gpio_to_irq(td->ext_te_gpio),
+		r = devm_request_irq(dssdev->dev, gpio_to_irq(td->ext_te_gpio),
 				taal_te_isr,
 				IRQF_TRIGGER_RISING,
 				"taal vsync", dssdev);
 
 		if (r) {
-			dev_err(&dssdev->dev, "IRQ request failed\n");
+			dev_err(dssdev->dev, "IRQ request failed\n");
 			return r;
 		}
 
 		INIT_DEFERRABLE_WORK(&td->te_timeout_work,
 					taal_te_timeout_work_callback);
 
-		dev_dbg(&dssdev->dev, "Using GPIO TE\n");
+		dev_dbg(dssdev->dev, "Using GPIO TE\n");
 	}
 
 	td->workqueue = create_singlethread_workqueue("taal_esd");
 	if (td->workqueue == NULL) {
-		dev_err(&dssdev->dev, "can't create ESD workqueue\n");
+		dev_err(dssdev->dev, "can't create ESD workqueue\n");
 		return -ENOMEM;
 	}
 	INIT_DEFERRABLE_WORK(&td->esd_work, taal_esd_work);
@@ -844,8 +844,8 @@ static int taal_probe(struct omap_dss_device *dssdev)
 		props.max_brightness = 255;
 
 		props.type = BACKLIGHT_RAW;
-		bldev = backlight_device_register(dev_name(&dssdev->dev),
-				&dssdev->dev, dssdev, &taal_bl_ops, &props);
+		bldev = backlight_device_register(dev_name(dssdev->dev),
+				dssdev->dev, dssdev, &taal_bl_ops, &props);
 		if (IS_ERR(bldev)) {
 			r = PTR_ERR(bldev);
 			goto err_bl;
@@ -862,19 +862,19 @@ static int taal_probe(struct omap_dss_device *dssdev)
 
 	r = omap_dsi_request_vc(dssdev, &td->channel);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to get virtual channel\n");
+		dev_err(dssdev->dev, "failed to get virtual channel\n");
 		goto err_req_vc;
 	}
 
 	r = omap_dsi_set_vc_id(dssdev, td->channel, TCH);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to set VC_ID\n");
+		dev_err(dssdev->dev, "failed to set VC_ID\n");
 		goto err_vc_id;
 	}
 
-	r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
+	r = sysfs_create_group(&dssdev->dev->kobj, &taal_attr_group);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to create sysfs files\n");
+		dev_err(dssdev->dev, "failed to create sysfs files\n");
 		goto err_vc_id;
 	}
 
@@ -892,12 +892,12 @@ err_bl:
 
 static void __exit taal_remove(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	struct backlight_device *bldev;
 
-	dev_dbg(&dssdev->dev, "remove\n");
+	dev_dbg(dssdev->dev, "remove\n");
 
-	sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
+	sysfs_remove_group(&dssdev->dev->kobj, &taal_attr_group);
 	omap_dsi_release_vc(dssdev, td->channel);
 
 	bldev = td->bldev;
@@ -917,7 +917,7 @@ static void __exit taal_remove(struct omap_dss_device *dssdev)
 
 static int taal_power_on(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	u8 id1, id2, id3;
 	int r;
 	struct omap_dss_dsi_config dsi_config = {
@@ -932,19 +932,19 @@ static int taal_power_on(struct omap_dss_device *dssdev)
 
 	r = omapdss_dsi_configure_pins(dssdev, &td->pin_config);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to configure DSI pins\n");
+		dev_err(dssdev->dev, "failed to configure DSI pins\n");
 		goto err0;
 	};
 
 	r = omapdss_dsi_set_config(dssdev, &dsi_config);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to configure DSI\n");
+		dev_err(dssdev->dev, "failed to configure DSI\n");
 		goto err0;
 	}
 
 	r = omapdss_dsi_display_enable(dssdev);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to enable DSI\n");
+		dev_err(dssdev->dev, "failed to enable DSI\n");
 		goto err0;
 	}
 
@@ -999,10 +999,10 @@ static int taal_power_on(struct omap_dss_device *dssdev)
 	td->enabled = 1;
 
 	if (!td->intro_printed) {
-		dev_info(&dssdev->dev, "panel revision %02x.%02x.%02x\n",
+		dev_info(dssdev->dev, "panel revision %02x.%02x.%02x\n",
 			id1, id2, id3);
 		if (td->cabc_broken)
-			dev_info(&dssdev->dev,
+			dev_info(dssdev->dev,
 					"old Taal version, CABC disabled\n");
 		td->intro_printed = true;
 	}
@@ -1011,7 +1011,7 @@ static int taal_power_on(struct omap_dss_device *dssdev)
 
 	return 0;
 err:
-	dev_err(&dssdev->dev, "error while enabling panel, issuing HW reset\n");
+	dev_err(dssdev->dev, "error while enabling panel, issuing HW reset\n");
 
 	taal_hw_reset(dssdev);
 
@@ -1022,7 +1022,7 @@ err0:
 
 static void taal_power_off(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	dsi_disable_video_output(dssdev, td->channel);
@@ -1032,7 +1032,7 @@ static void taal_power_off(struct omap_dss_device *dssdev)
 		r = taal_sleep_in(td);
 
 	if (r) {
-		dev_err(&dssdev->dev,
+		dev_err(dssdev->dev,
 				"error disabling panel, issuing HW reset\n");
 		taal_hw_reset(dssdev);
 	}
@@ -1044,7 +1044,7 @@ static void taal_power_off(struct omap_dss_device *dssdev)
 
 static int taal_panel_reset(struct omap_dss_device *dssdev)
 {
-	dev_err(&dssdev->dev, "performing LCD reset\n");
+	dev_err(dssdev->dev, "performing LCD reset\n");
 
 	taal_power_off(dssdev);
 	taal_hw_reset(dssdev);
@@ -1053,10 +1053,10 @@ static int taal_panel_reset(struct omap_dss_device *dssdev)
 
 static int taal_enable(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
-	dev_dbg(&dssdev->dev, "enable\n");
+	dev_dbg(dssdev->dev, "enable\n");
 
 	mutex_lock(&td->lock);
 
@@ -1082,16 +1082,16 @@ static int taal_enable(struct omap_dss_device *dssdev)
 
 	return 0;
 err:
-	dev_dbg(&dssdev->dev, "enable failed\n");
+	dev_dbg(dssdev->dev, "enable failed\n");
 	mutex_unlock(&td->lock);
 	return r;
 }
 
 static void taal_disable(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
-	dev_dbg(&dssdev->dev, "disable\n");
+	dev_dbg(dssdev->dev, "disable\n");
 
 	mutex_lock(&td->lock);
 
@@ -1118,14 +1118,14 @@ static void taal_disable(struct omap_dss_device *dssdev)
 static void taal_framedone_cb(int err, void *data)
 {
 	struct omap_dss_device *dssdev = data;
-	dev_dbg(&dssdev->dev, "framedone, err %d\n", err);
+	dev_dbg(dssdev->dev, "framedone, err %d\n", err);
 	dsi_bus_unlock(dssdev);
 }
 
 static irqreturn_t taal_te_isr(int irq, void *data)
 {
 	struct omap_dss_device *dssdev = data;
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int old;
 	int r;
 
@@ -1142,7 +1142,7 @@ static irqreturn_t taal_te_isr(int irq, void *data)
 
 	return IRQ_HANDLED;
 err:
-	dev_err(&dssdev->dev, "start update failed\n");
+	dev_err(dssdev->dev, "start update failed\n");
 	dsi_bus_unlock(dssdev);
 	return IRQ_HANDLED;
 }
@@ -1153,7 +1153,7 @@ static void taal_te_timeout_work_callback(struct work_struct *work)
 					te_timeout_work.work);
 	struct omap_dss_device *dssdev = td->dssdev;
 
-	dev_err(&dssdev->dev, "TE not received for 250ms!\n");
+	dev_err(dssdev->dev, "TE not received for 250ms!\n");
 
 	atomic_set(&td->do_update, 0);
 	dsi_bus_unlock(dssdev);
@@ -1162,10 +1162,10 @@ static void taal_te_timeout_work_callback(struct work_struct *work)
 static int taal_update(struct omap_dss_device *dssdev,
 				    u16 x, u16 y, u16 w, u16 h)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
-	dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
+	dev_dbg(dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
 
 	mutex_lock(&td->lock);
 	dsi_bus_lock(dssdev);
@@ -1208,23 +1208,23 @@ err:
 
 static int taal_sync(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
-	dev_dbg(&dssdev->dev, "sync\n");
+	dev_dbg(dssdev->dev, "sync\n");
 
 	mutex_lock(&td->lock);
 	dsi_bus_lock(dssdev);
 	dsi_bus_unlock(dssdev);
 	mutex_unlock(&td->lock);
 
-	dev_dbg(&dssdev->dev, "sync done\n");
+	dev_dbg(dssdev->dev, "sync done\n");
 
 	return 0;
 }
 
 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	if (enable)
@@ -1243,7 +1243,7 @@ static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
 
 static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&td->lock);
@@ -1279,7 +1279,7 @@ err:
 
 static int taal_get_te(struct omap_dss_device *dssdev)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&td->lock);
@@ -1291,7 +1291,7 @@ static int taal_get_te(struct omap_dss_device *dssdev)
 
 static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
 {
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 	u8 id1, id2, id3;
 	int r;
 
@@ -1336,7 +1336,7 @@ static int taal_memory_read(struct omap_dss_device *dssdev,
 	int first = 1;
 	int plen;
 	unsigned buf_used = 0;
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct taal_data *td = dev_get_drvdata(dssdev->dev);
 
 	if (size < w * h * 3)
 		return -ENOMEM;
@@ -1380,19 +1380,19 @@ static int taal_memory_read(struct omap_dss_device *dssdev,
 				buf + buf_used, size - buf_used);
 
 		if (r < 0) {
-			dev_err(&dssdev->dev, "read error\n");
+			dev_err(dssdev->dev, "read error\n");
 			goto err3;
 		}
 
 		buf_used += r;
 
 		if (r < plen) {
-			dev_err(&dssdev->dev, "short read\n");
+			dev_err(dssdev->dev, "short read\n");
 			break;
 		}
 
 		if (signal_pending(current)) {
-			dev_err(&dssdev->dev, "signal pending, "
+			dev_err(dssdev->dev, "signal pending, "
 					"aborting memory read\n");
 			r = -ERESTARTSYS;
 			goto err3;
@@ -1450,26 +1450,26 @@ static void taal_esd_work(struct work_struct *work)
 
 	r = taal_wake_up(dssdev);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to exit ULPS\n");
+		dev_err(dssdev->dev, "failed to exit ULPS\n");
 		goto err;
 	}
 
 	r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state1);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to read Taal status\n");
+		dev_err(dssdev->dev, "failed to read Taal status\n");
 		goto err;
 	}
 
 	/* Run self diagnostics */
 	r = taal_sleep_out(td);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to run Taal self-diagnostics\n");
+		dev_err(dssdev->dev, "failed to run Taal self-diagnostics\n");
 		goto err;
 	}
 
 	r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state2);
 	if (r) {
-		dev_err(&dssdev->dev, "failed to read Taal status\n");
+		dev_err(dssdev->dev, "failed to read Taal status\n");
 		goto err;
 	}
 
@@ -1477,7 +1477,7 @@ static void taal_esd_work(struct work_struct *work)
 	 * Bit6 if the test passes.
 	 */
 	if (!((state1 ^ state2) & (1 << 6))) {
-		dev_err(&dssdev->dev, "LCD self diagnostics failed\n");
+		dev_err(dssdev->dev, "LCD self diagnostics failed\n");
 		goto err;
 	}
 	/* Self-diagnostics result is also shown on TE GPIO line. We need
@@ -1495,7 +1495,7 @@ static void taal_esd_work(struct work_struct *work)
 	mutex_unlock(&td->lock);
 	return;
 err:
-	dev_err(&dssdev->dev, "performing LCD reset\n");
+	dev_err(dssdev->dev, "performing LCD reset\n");
 
 	taal_panel_reset(dssdev);
 
diff --git a/drivers/video/omap2/displays/panel-tfp410.c b/drivers/video/omap2/displays/panel-tfp410.c
index 46039c4..1fdfb15 100644
--- a/drivers/video/omap2/displays/panel-tfp410.c
+++ b/drivers/video/omap2/displays/panel-tfp410.c
@@ -59,7 +59,7 @@ struct panel_drv_data {
 
 static int tfp410_power_on(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
@@ -82,7 +82,7 @@ err0:
 
 static void tfp410_power_off(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 
 	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 		return;
@@ -99,7 +99,7 @@ static int tfp410_probe(struct omap_dss_device *dssdev)
 	int r;
 	int i2c_bus_num;
 
-	ddata = devm_kzalloc(&dssdev->dev, sizeof(*ddata), GFP_KERNEL);
+	ddata = devm_kzalloc(dssdev->dev, sizeof(*ddata), GFP_KERNEL);
 	if (!ddata)
 		return -ENOMEM;
 
@@ -119,10 +119,10 @@ static int tfp410_probe(struct omap_dss_device *dssdev)
 	}
 
 	if (gpio_is_valid(ddata->pd_gpio)) {
-		r = devm_gpio_request_one(&dssdev->dev, ddata->pd_gpio,
+		r = devm_gpio_request_one(dssdev->dev, ddata->pd_gpio,
 				GPIOF_OUT_INIT_LOW, "tfp410 pd");
 		if (r) {
-			dev_err(&dssdev->dev, "Failed to request PD GPIO %d\n",
+			dev_err(dssdev->dev, "Failed to request PD GPIO %d\n",
 					ddata->pd_gpio);
 			return r;
 		}
@@ -133,7 +133,7 @@ static int tfp410_probe(struct omap_dss_device *dssdev)
 
 		adapter = i2c_get_adapter(i2c_bus_num);
 		if (!adapter) {
-			dev_err(&dssdev->dev, "Failed to get I2C adapter, bus %d\n",
+			dev_err(dssdev->dev, "Failed to get I2C adapter, bus %d\n",
 					i2c_bus_num);
 			return -EPROBE_DEFER;
 		}
@@ -141,28 +141,28 @@ static int tfp410_probe(struct omap_dss_device *dssdev)
 		ddata->i2c_adapter = adapter;
 	}
 
-	dev_set_drvdata(&dssdev->dev, ddata);
+	dev_set_drvdata(dssdev->dev, ddata);
 
 	return 0;
 }
 
 static void __exit tfp410_remove(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&ddata->lock);
 
 	if (ddata->i2c_adapter)
 		i2c_put_adapter(ddata->i2c_adapter);
 
-	dev_set_drvdata(&dssdev->dev, NULL);
+	dev_set_drvdata(dssdev->dev, NULL);
 
 	mutex_unlock(&ddata->lock);
 }
 
 static int tfp410_enable(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&ddata->lock);
@@ -178,7 +178,7 @@ static int tfp410_enable(struct omap_dss_device *dssdev)
 
 static void tfp410_disable(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&ddata->lock);
 
@@ -192,7 +192,7 @@ static void tfp410_disable(struct omap_dss_device *dssdev)
 static void tfp410_set_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&ddata->lock);
 	omapdss_dpi_set_timings(dssdev, timings);
@@ -203,7 +203,7 @@ static void tfp410_set_timings(struct omap_dss_device *dssdev,
 static void tfp410_get_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 
 	mutex_lock(&ddata->lock);
 	*timings = dssdev->panel.timings;
@@ -213,7 +213,7 @@ static void tfp410_get_timings(struct omap_dss_device *dssdev,
 static int tfp410_check_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	mutex_lock(&ddata->lock);
@@ -258,7 +258,7 @@ static int tfp410_ddc_read(struct i2c_adapter *adapter,
 static int tfp410_read_edid(struct omap_dss_device *dssdev,
 		u8 *edid, int len)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 	int r, l, bytes_read;
 
 	mutex_lock(&ddata->lock);
@@ -298,7 +298,7 @@ err:
 
 static bool tfp410_detect(struct omap_dss_device *dssdev)
 {
-	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);
+	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
 	unsigned char out;
 	int r;
 
diff --git a/drivers/video/omap2/displays/panel-tpo-td043mtea1.c b/drivers/video/omap2/displays/panel-tpo-td043mtea1.c
index abf2bc4..7729b6f 100644
--- a/drivers/video/omap2/displays/panel-tpo-td043mtea1.c
+++ b/drivers/video/omap2/displays/panel-tpo-td043mtea1.c
@@ -126,7 +126,7 @@ static int tpo_td043_write_mirror(struct spi_device *spi, bool h, bool v)
 
 static int tpo_td043_set_hmirror(struct omap_dss_device *dssdev, bool enable)
 {
-	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev);
 
 	tpo_td043->hmirror = enable;
 	return tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror,
@@ -135,7 +135,7 @@ static int tpo_td043_set_hmirror(struct omap_dss_device *dssdev, bool enable)
 
 static bool tpo_td043_get_hmirror(struct omap_dss_device *dssdev)
 {
-	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev);
 
 	return tpo_td043->hmirror;
 }
@@ -338,7 +338,7 @@ static void tpo_td043_power_off(struct tpo_td043_device *tpo_td043)
 
 static int tpo_td043_enable_dss(struct omap_dss_device *dssdev)
 {
-	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev);
 	int r;
 
 	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
@@ -372,7 +372,7 @@ err0:
 
 static void tpo_td043_disable_dss(struct omap_dss_device *dssdev)
 {
-	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev);
 
 	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 		return;
@@ -385,14 +385,14 @@ static void tpo_td043_disable_dss(struct omap_dss_device *dssdev)
 
 static int tpo_td043_enable(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "enable\n");
+	dev_dbg(dssdev->dev, "enable\n");
 
 	return tpo_td043_enable_dss(dssdev);
 }
 
 static void tpo_td043_disable(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "disable\n");
+	dev_dbg(dssdev->dev, "disable\n");
 
 	tpo_td043_disable_dss(dssdev);
 
@@ -405,10 +405,10 @@ static int tpo_td043_probe(struct omap_dss_device *dssdev)
 	struct panel_tpo_td043_data *pdata = get_panel_data(dssdev);
 	int ret = 0;
 
-	dev_dbg(&dssdev->dev, "probe\n");
+	dev_dbg(dssdev->dev, "probe\n");
 
 	if (tpo_td043 == NULL) {
-		dev_err(&dssdev->dev, "missing tpo_td043_device\n");
+		dev_err(dssdev->dev, "missing tpo_td043_device\n");
 		return -ENODEV;
 	}
 
@@ -423,28 +423,28 @@ static int tpo_td043_probe(struct omap_dss_device *dssdev)
 	tpo_td043->mode = TPO_R02_MODE_800x480;
 	memcpy(tpo_td043->gamma, tpo_td043_def_gamma, sizeof(tpo_td043->gamma));
 
-	tpo_td043->vcc_reg = regulator_get(&dssdev->dev, "vcc");
+	tpo_td043->vcc_reg = regulator_get(dssdev->dev, "vcc");
 	if (IS_ERR(tpo_td043->vcc_reg)) {
-		dev_err(&dssdev->dev, "failed to get LCD VCC regulator\n");
+		dev_err(dssdev->dev, "failed to get LCD VCC regulator\n");
 		ret = PTR_ERR(tpo_td043->vcc_reg);
 		goto fail_regulator;
 	}
 
 	if (gpio_is_valid(tpo_td043->nreset_gpio)) {
-		ret = devm_gpio_request_one(&dssdev->dev,
+		ret = devm_gpio_request_one(dssdev->dev,
 				tpo_td043->nreset_gpio, GPIOF_OUT_INIT_LOW,
 				"lcd reset");
 		if (ret < 0) {
-			dev_err(&dssdev->dev, "couldn't request reset GPIO\n");
+			dev_err(dssdev->dev, "couldn't request reset GPIO\n");
 			goto fail_gpio_req;
 		}
 	}
 
-	ret = sysfs_create_group(&dssdev->dev.kobj, &tpo_td043_attr_group);
+	ret = sysfs_create_group(&dssdev->dev->kobj, &tpo_td043_attr_group);
 	if (ret)
-		dev_warn(&dssdev->dev, "failed to create sysfs files\n");
+		dev_warn(dssdev->dev, "failed to create sysfs files\n");
 
-	dev_set_drvdata(&dssdev->dev, tpo_td043);
+	dev_set_drvdata(dssdev->dev, tpo_td043);
 
 	return 0;
 
@@ -457,11 +457,11 @@ fail_regulator:
 
 static void tpo_td043_remove(struct omap_dss_device *dssdev)
 {
-	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+	struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev);
 
-	dev_dbg(&dssdev->dev, "remove\n");
+	dev_dbg(dssdev->dev, "remove\n");
 
-	sysfs_remove_group(&dssdev->dev.kobj, &tpo_td043_attr_group);
+	sysfs_remove_group(&dssdev->dev->kobj, &tpo_td043_attr_group);
 	regulator_put(tpo_td043->vcc_reg);
 }
 
diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index e88d5f0..98a688e 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -429,30 +429,32 @@ struct omap_dss_device *dss_alloc_and_init_device(struct device *parent)
 	if (!dssdev)
 		return NULL;
 
-	dssdev->dev.bus = &dss_bus_type;
-	dssdev->dev.parent = parent;
-	dssdev->dev.release = omap_dss_dev_release;
-	dev_set_name(&dssdev->dev, "display%d", disp_num_counter++);
+	dssdev->old_dev.bus = &dss_bus_type;
+	dssdev->old_dev.parent = parent;
+	dssdev->old_dev.release = omap_dss_dev_release;
+	dev_set_name(&dssdev->old_dev, "display%d", disp_num_counter++);
 
-	device_initialize(&dssdev->dev);
+	device_initialize(&dssdev->old_dev);
 
 	return dssdev;
 }
 
 int dss_add_device(struct omap_dss_device *dssdev)
 {
+	dssdev->dev = &dssdev->old_dev;
+
 	omapdss_register_display(dssdev);
-	return device_add(&dssdev->dev);
+	return device_add(&dssdev->old_dev);
 }
 
 void dss_put_device(struct omap_dss_device *dssdev)
 {
-	put_device(&dssdev->dev);
+	put_device(&dssdev->old_dev);
 }
 
 void dss_unregister_device(struct omap_dss_device *dssdev)
 {
-	device_unregister(&dssdev->dev);
+	device_unregister(&dssdev->old_dev);
 	omapdss_unregister_display(dssdev);
 }
 
diff --git a/drivers/video/omap2/dss/display-sysfs.c b/drivers/video/omap2/dss/display-sysfs.c
index 58abbaf..21d7f77 100644
--- a/drivers/video/omap2/dss/display-sysfs.c
+++ b/drivers/video/omap2/dss/display-sysfs.c
@@ -33,7 +33,7 @@ static struct omap_dss_device *to_dss_device_sysfs(struct device *dev)
 	struct omap_dss_device *dssdev = NULL;
 
 	for_each_dss_dev(dssdev) {
-		if (&dssdev->dev == dev) {
+		if (dssdev->dev == dev) {
 			omap_dss_put_device(dssdev);
 			return dssdev;
 		}
@@ -308,7 +308,7 @@ int display_init_sysfs(struct platform_device *pdev)
 	int r;
 
 	for_each_dss_dev(dssdev) {
-		struct kobject *kobj = &dssdev->dev.kobj;
+		struct kobject *kobj = &dssdev->dev->kobj;
 
 		r = sysfs_create_files(kobj, display_sysfs_attrs);
 		if (r) {
@@ -339,6 +339,7 @@ void display_uninit_sysfs(struct platform_device *pdev)
 
 	for_each_dss_dev(dssdev) {
 		sysfs_remove_link(&pdev->dev.kobj, dssdev->alias);
-		sysfs_remove_files(&dssdev->dev.kobj, display_sysfs_attrs);
+		sysfs_remove_files(&dssdev->dev->kobj,
+				display_sysfs_attrs);
 	}
 }
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index dfe3322..a9a1d55 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -160,13 +160,13 @@ EXPORT_SYMBOL(omapdss_unregister_display);
 
 void omap_dss_get_device(struct omap_dss_device *dssdev)
 {
-	get_device(&dssdev->dev);
+	get_device(dssdev->dev);
 }
 EXPORT_SYMBOL(omap_dss_get_device);
 
 void omap_dss_put_device(struct omap_dss_device *dssdev)
 {
-	put_device(&dssdev->dev);
+	put_device(dssdev->dev);
 }
 EXPORT_SYMBOL(omap_dss_put_device);
 
@@ -240,9 +240,8 @@ int omap_dss_start_device(struct omap_dss_device *dssdev)
 		return -ENODEV;
 	}
 
-	if (!try_module_get(dssdev->dev.driver->owner)) {
+	if (!try_module_get(dssdev->dev->driver->owner))
 		return -ENODEV;
-	}
 
 	return 0;
 }
@@ -250,7 +249,7 @@ EXPORT_SYMBOL(omap_dss_start_device);
 
 void omap_dss_stop_device(struct omap_dss_device *dssdev)
 {
-	module_put(dssdev->dev.driver->owner);
+	module_put(dssdev->dev->driver->owner);
 }
 EXPORT_SYMBOL(omap_dss_stop_device);
 
diff --git a/drivers/video/omap2/dss/venc_panel.c b/drivers/video/omap2/dss/venc_panel.c
index 0d2b1a0..f7d92c5 100644
--- a/drivers/video/omap2/dss/venc_panel.c
+++ b/drivers/video/omap2/dss/venc_panel.c
@@ -107,19 +107,19 @@ static int venc_panel_probe(struct omap_dss_device *dssdev)
 
 	dssdev->panel.timings = default_timings;
 
-	return device_create_file(&dssdev->dev, &dev_attr_output_type);
+	return device_create_file(dssdev->dev, &dev_attr_output_type);
 }
 
 static void venc_panel_remove(struct omap_dss_device *dssdev)
 {
-	device_remove_file(&dssdev->dev, &dev_attr_output_type);
+	device_remove_file(dssdev->dev, &dev_attr_output_type);
 }
 
 static int venc_panel_enable(struct omap_dss_device *dssdev)
 {
 	int r;
 
-	dev_dbg(&dssdev->dev, "venc_panel_enable\n");
+	dev_dbg(dssdev->dev, "venc_panel_enable\n");
 
 	mutex_lock(&venc_panel.lock);
 
@@ -150,7 +150,7 @@ err:
 
 static void venc_panel_disable(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "venc_panel_disable\n");
+	dev_dbg(dssdev->dev, "venc_panel_disable\n");
 
 	mutex_lock(&venc_panel.lock);
 
@@ -167,7 +167,7 @@ end:
 static void venc_panel_set_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	dev_dbg(&dssdev->dev, "venc_panel_set_timings\n");
+	dev_dbg(dssdev->dev, "venc_panel_set_timings\n");
 
 	mutex_lock(&venc_panel.lock);
 
@@ -180,21 +180,21 @@ static void venc_panel_set_timings(struct omap_dss_device *dssdev,
 static int venc_panel_check_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings)
 {
-	dev_dbg(&dssdev->dev, "venc_panel_check_timings\n");
+	dev_dbg(dssdev->dev, "venc_panel_check_timings\n");
 
 	return omapdss_venc_check_timings(dssdev, timings);
 }
 
 static u32 venc_panel_get_wss(struct omap_dss_device *dssdev)
 {
-	dev_dbg(&dssdev->dev, "venc_panel_get_wss\n");
+	dev_dbg(dssdev->dev, "venc_panel_get_wss\n");
 
 	return omapdss_venc_get_wss(dssdev);
 }
 
 static int venc_panel_set_wss(struct omap_dss_device *dssdev, u32 wss)
 {
-	dev_dbg(&dssdev->dev, "venc_panel_set_wss\n");
+	dev_dbg(dssdev->dev, "venc_panel_set_wss\n");
 
 	return omapdss_venc_set_wss(dssdev, wss);
 }
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index b19a8d2..f8e0e64 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -596,7 +596,11 @@ struct omap_dss_output {
 };
 
 struct omap_dss_device {
-	struct device dev;
+	/* old device, to be removed */
+	struct device old_dev;
+
+	/* new device, pointer to panel device */
+	struct device *dev;
 
 	struct list_head panel_list;
 
@@ -855,7 +859,7 @@ int dispc_ovl_setup(enum omap_plane plane, const struct omap_overlay_info *oi,
 		bool mem_to_mem);
 
 #define to_dss_driver(x) container_of((x), struct omap_dss_driver, driver)
-#define to_dss_device(x) container_of((x), struct omap_dss_device, dev)
+#define to_dss_device(x) container_of((x), struct omap_dss_device, old_dev)
 
 void omapdss_dsi_vc_enable_hs(struct omap_dss_device *dssdev, int channel,
 		bool enable);
-- 
1.8.1.2

[PATCH 26/32] OMAPDSS: remove omap_dss_start/stop_device()

[Tomi Valkeinen]

The omap_dss_start_device() and omap_dss_stop_device(), called by the
DSS output drivers, are old relics. They originally did something
totally else, but nowadays they increase the module ref count for panels
that are enabled.

This model is quite broken: the panel modules may be used even before
they are enabled. For example, configuring the panel requires calls to
functions located in the panel modules.

In the following patches we try to improve the ref count management for
the modules and display devices. The first step, however, is to remove
the omap_dss_start/stop_device() totally.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/display.c | 20 --------------------
 drivers/video/omap2/dss/dpi.c     | 10 ----------
 drivers/video/omap2/dss/dsi.c     | 10 ----------
 drivers/video/omap2/dss/hdmi.c    | 12 +-----------
 drivers/video/omap2/dss/rfbi.c    |  9 ---------
 drivers/video/omap2/dss/sdi.c     | 10 ----------
 drivers/video/omap2/dss/venc.c    | 12 +-----------
 include/video/omapdss.h           |  3 ---
 8 files changed, 2 insertions(+), 84 deletions(-)

diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index a9a1d55..8096764 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -233,26 +233,6 @@ struct omap_dss_device *omap_dss_find_device(void *data,
 }
 EXPORT_SYMBOL(omap_dss_find_device);
 
-int omap_dss_start_device(struct omap_dss_device *dssdev)
-{
-	if (!dssdev->driver) {
-		DSSDBG("no driver\n");
-		return -ENODEV;
-	}
-
-	if (!try_module_get(dssdev->dev->driver->owner))
-		return -ENODEV;
-
-	return 0;
-}
-EXPORT_SYMBOL(omap_dss_start_device);
-
-void omap_dss_stop_device(struct omap_dss_device *dssdev)
-{
-	module_put(dssdev->dev->driver->owner);
-}
-EXPORT_SYMBOL(omap_dss_stop_device);
-
 void videomode_to_omap_video_timings(const struct videomode *vm,
 		struct omap_video_timings *ovt)
 {
diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index 66ba9a6..d369927 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -365,12 +365,6 @@ int omapdss_dpi_display_enable(struct omap_dss_device *dssdev)
 		goto err_no_out_mgr;
 	}
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err_start_dev;
-	}
-
 	if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI)) {
 		r = regulator_enable(dpi.vdds_dsi_reg);
 		if (r)
@@ -425,8 +419,6 @@ err_get_dispc:
 	if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI))
 		regulator_disable(dpi.vdds_dsi_reg);
 err_reg_enable:
-	omap_dss_stop_device(dssdev);
-err_start_dev:
 err_no_out_mgr:
 err_no_reg:
 	mutex_unlock(&dpi.lock);
@@ -453,8 +445,6 @@ void omapdss_dpi_display_disable(struct omap_dss_device *dssdev)
 	if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI))
 		regulator_disable(dpi.vdds_dsi_reg);
 
-	omap_dss_stop_device(dssdev);
-
 	mutex_unlock(&dpi.lock);
 }
 EXPORT_SYMBOL(omapdss_dpi_display_disable);
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index 37ca980..892838e 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -4592,12 +4592,6 @@ int omapdss_dsi_display_enable(struct omap_dss_device *dssdev)
 
 	mutex_lock(&dsi->lock);
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err_start_dev;
-	}
-
 	r = dsi_runtime_get(dsidev);
 	if (r)
 		goto err_get_dsi;
@@ -4618,8 +4612,6 @@ err_init_dsi:
 	dsi_enable_pll_clock(dsidev, 0);
 	dsi_runtime_put(dsidev);
 err_get_dsi:
-	omap_dss_stop_device(dssdev);
-err_start_dev:
 	mutex_unlock(&dsi->lock);
 	DSSDBG("dsi_display_enable FAILED\n");
 	return r;
@@ -4648,8 +4640,6 @@ void omapdss_dsi_display_disable(struct omap_dss_device *dssdev,
 	dsi_runtime_put(dsidev);
 	dsi_enable_pll_clock(dsidev, 0);
 
-	omap_dss_stop_device(dssdev);
-
 	mutex_unlock(&dsi->lock);
 }
 EXPORT_SYMBOL(omapdss_dsi_display_disable);
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 6d1e97c..e7fe182 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -735,23 +735,15 @@ int omapdss_hdmi_display_enable(struct omap_dss_device *dssdev)
 
 	hdmi.ip_data.hpd_gpio = hdmi.hpd_gpio;
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err0;
-	}
-
 	r = hdmi_power_on_full(dssdev);
 	if (r) {
 		DSSERR("failed to power on device\n");
-		goto err1;
+		goto err0;
 	}
 
 	mutex_unlock(&hdmi.lock);
 	return 0;
 
-err1:
-	omap_dss_stop_device(dssdev);
 err0:
 	mutex_unlock(&hdmi.lock);
 	return r;
@@ -765,8 +757,6 @@ void omapdss_hdmi_display_disable(struct omap_dss_device *dssdev)
 
 	hdmi_power_off_full(dssdev);
 
-	omap_dss_stop_device(dssdev);
-
 	mutex_unlock(&hdmi.lock);
 }
 
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index cfcb52f..30ff0e0 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -902,12 +902,6 @@ int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 	if (r)
 		return r;
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err0;
-	}
-
 	r = dss_mgr_register_framedone_handler(out->manager,
 			framedone_callback, NULL);
 	if (r) {
@@ -924,8 +918,6 @@ int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 
 	return 0;
 err1:
-	omap_dss_stop_device(dssdev);
-err0:
 	rfbi_runtime_put();
 	return r;
 }
@@ -937,7 +929,6 @@ void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev)
 
 	dss_mgr_unregister_framedone_handler(out->manager,
 			framedone_callback, NULL);
-	omap_dss_stop_device(dssdev);
 
 	rfbi_runtime_put();
 }
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index e723687..ce37c80 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -139,12 +139,6 @@ int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
 		return -ENODEV;
 	}
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err_start_dev;
-	}
-
 	r = regulator_enable(sdi.vdds_sdi_reg);
 	if (r)
 		goto err_reg_enable;
@@ -216,8 +210,6 @@ err_calc_clock_div:
 err_get_dispc:
 	regulator_disable(sdi.vdds_sdi_reg);
 err_reg_enable:
-	omap_dss_stop_device(dssdev);
-err_start_dev:
 	return r;
 }
 EXPORT_SYMBOL(omapdss_sdi_display_enable);
@@ -233,8 +225,6 @@ void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)
 	dispc_runtime_put();
 
 	regulator_disable(sdi.vdds_sdi_reg);
-
-	omap_dss_stop_device(dssdev);
 }
 EXPORT_SYMBOL(omapdss_sdi_display_disable);
 
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index af404b4..bac904c 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -513,23 +513,15 @@ int omapdss_venc_display_enable(struct omap_dss_device *dssdev)
 		goto err0;
 	}
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err0;
-	}
-
 	r = venc_power_on(dssdev);
 	if (r)
-		goto err1;
+		goto err0;
 
 	venc.wss_data = 0;
 
 	mutex_unlock(&venc.venc_lock);
 
 	return 0;
-err1:
-	omap_dss_stop_device(dssdev);
 err0:
 	mutex_unlock(&venc.venc_lock);
 	return r;
@@ -543,8 +535,6 @@ void omapdss_venc_display_disable(struct omap_dss_device *dssdev)
 
 	venc_power_off(dssdev);
 
-	omap_dss_stop_device(dssdev);
-
 	mutex_unlock(&venc.venc_lock);
 }
 
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index f8e0e64..3aa89c4 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -778,9 +778,6 @@ struct omap_dss_device *omap_dss_find_device(void *data,
 		int (*match)(struct omap_dss_device *dssdev, void *data));
 const char *omapdss_get_default_display_name(void);
 
-int omap_dss_start_device(struct omap_dss_device *dssdev);
-void omap_dss_stop_device(struct omap_dss_device *dssdev);
-
 void videomode_to_omap_video_timings(const struct videomode *vm,
 		struct omap_video_timings *ovt);
 void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
-- 
1.8.1.2

[PATCH 26/32] OMAPDSS: remove omap_dss_start/stop_device()

[Tomi Valkeinen]

The omap_dss_start_device() and omap_dss_stop_device(), called by the
DSS output drivers, are old relics. They originally did something
totally else, but nowadays they increase the module ref count for panels
that are enabled.

This model is quite broken: the panel modules may be used even before
they are enabled. For example, configuring the panel requires calls to
functions located in the panel modules.

In the following patches we try to improve the ref count management for
the modules and display devices. The first step, however, is to remove
the omap_dss_start/stop_device() totally.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/display.c | 20 --------------------
 drivers/video/omap2/dss/dpi.c     | 10 ----------
 drivers/video/omap2/dss/dsi.c     | 10 ----------
 drivers/video/omap2/dss/hdmi.c    | 12 +-----------
 drivers/video/omap2/dss/rfbi.c    |  9 ---------
 drivers/video/omap2/dss/sdi.c     | 10 ----------
 drivers/video/omap2/dss/venc.c    | 12 +-----------
 include/video/omapdss.h           |  3 ---
 8 files changed, 2 insertions(+), 84 deletions(-)

diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index a9a1d55..8096764 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -233,26 +233,6 @@ struct omap_dss_device *omap_dss_find_device(void *data,
 }
 EXPORT_SYMBOL(omap_dss_find_device);
 
-int omap_dss_start_device(struct omap_dss_device *dssdev)
-{
-	if (!dssdev->driver) {
-		DSSDBG("no driver\n");
-		return -ENODEV;
-	}
-
-	if (!try_module_get(dssdev->dev->driver->owner))
-		return -ENODEV;
-
-	return 0;
-}
-EXPORT_SYMBOL(omap_dss_start_device);
-
-void omap_dss_stop_device(struct omap_dss_device *dssdev)
-{
-	module_put(dssdev->dev->driver->owner);
-}
-EXPORT_SYMBOL(omap_dss_stop_device);
-
 void videomode_to_omap_video_timings(const struct videomode *vm,
 		struct omap_video_timings *ovt)
 {
diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index 66ba9a6..d369927 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -365,12 +365,6 @@ int omapdss_dpi_display_enable(struct omap_dss_device *dssdev)
 		goto err_no_out_mgr;
 	}
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err_start_dev;
-	}
-
 	if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI)) {
 		r = regulator_enable(dpi.vdds_dsi_reg);
 		if (r)
@@ -425,8 +419,6 @@ err_get_dispc:
 	if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI))
 		regulator_disable(dpi.vdds_dsi_reg);
 err_reg_enable:
-	omap_dss_stop_device(dssdev);
-err_start_dev:
 err_no_out_mgr:
 err_no_reg:
 	mutex_unlock(&dpi.lock);
@@ -453,8 +445,6 @@ void omapdss_dpi_display_disable(struct omap_dss_device *dssdev)
 	if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI))
 		regulator_disable(dpi.vdds_dsi_reg);
 
-	omap_dss_stop_device(dssdev);
-
 	mutex_unlock(&dpi.lock);
 }
 EXPORT_SYMBOL(omapdss_dpi_display_disable);
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index 37ca980..892838e 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -4592,12 +4592,6 @@ int omapdss_dsi_display_enable(struct omap_dss_device *dssdev)
 
 	mutex_lock(&dsi->lock);
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err_start_dev;
-	}
-
 	r = dsi_runtime_get(dsidev);
 	if (r)
 		goto err_get_dsi;
@@ -4618,8 +4612,6 @@ err_init_dsi:
 	dsi_enable_pll_clock(dsidev, 0);
 	dsi_runtime_put(dsidev);
 err_get_dsi:
-	omap_dss_stop_device(dssdev);
-err_start_dev:
 	mutex_unlock(&dsi->lock);
 	DSSDBG("dsi_display_enable FAILED\n");
 	return r;
@@ -4648,8 +4640,6 @@ void omapdss_dsi_display_disable(struct omap_dss_device *dssdev,
 	dsi_runtime_put(dsidev);
 	dsi_enable_pll_clock(dsidev, 0);
 
-	omap_dss_stop_device(dssdev);
-
 	mutex_unlock(&dsi->lock);
 }
 EXPORT_SYMBOL(omapdss_dsi_display_disable);
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 6d1e97c..e7fe182 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -735,23 +735,15 @@ int omapdss_hdmi_display_enable(struct omap_dss_device *dssdev)
 
 	hdmi.ip_data.hpd_gpio = hdmi.hpd_gpio;
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err0;
-	}
-
 	r = hdmi_power_on_full(dssdev);
 	if (r) {
 		DSSERR("failed to power on device\n");
-		goto err1;
+		goto err0;
 	}
 
 	mutex_unlock(&hdmi.lock);
 	return 0;
 
-err1:
-	omap_dss_stop_device(dssdev);
 err0:
 	mutex_unlock(&hdmi.lock);
 	return r;
@@ -765,8 +757,6 @@ void omapdss_hdmi_display_disable(struct omap_dss_device *dssdev)
 
 	hdmi_power_off_full(dssdev);
 
-	omap_dss_stop_device(dssdev);
-
 	mutex_unlock(&hdmi.lock);
 }
 
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index cfcb52f..30ff0e0 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -902,12 +902,6 @@ int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 	if (r)
 		return r;
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err0;
-	}
-
 	r = dss_mgr_register_framedone_handler(out->manager,
 			framedone_callback, NULL);
 	if (r) {
@@ -924,8 +918,6 @@ int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 
 	return 0;
 err1:
-	omap_dss_stop_device(dssdev);
-err0:
 	rfbi_runtime_put();
 	return r;
 }
@@ -937,7 +929,6 @@ void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev)
 
 	dss_mgr_unregister_framedone_handler(out->manager,
 			framedone_callback, NULL);
-	omap_dss_stop_device(dssdev);
 
 	rfbi_runtime_put();
 }
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index e723687..ce37c80 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -139,12 +139,6 @@ int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
 		return -ENODEV;
 	}
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err_start_dev;
-	}
-
 	r = regulator_enable(sdi.vdds_sdi_reg);
 	if (r)
 		goto err_reg_enable;
@@ -216,8 +210,6 @@ err_calc_clock_div:
 err_get_dispc:
 	regulator_disable(sdi.vdds_sdi_reg);
 err_reg_enable:
-	omap_dss_stop_device(dssdev);
-err_start_dev:
 	return r;
 }
 EXPORT_SYMBOL(omapdss_sdi_display_enable);
@@ -233,8 +225,6 @@ void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)
 	dispc_runtime_put();
 
 	regulator_disable(sdi.vdds_sdi_reg);
-
-	omap_dss_stop_device(dssdev);
 }
 EXPORT_SYMBOL(omapdss_sdi_display_disable);
 
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index af404b4..bac904c 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -513,23 +513,15 @@ int omapdss_venc_display_enable(struct omap_dss_device *dssdev)
 		goto err0;
 	}
 
-	r = omap_dss_start_device(dssdev);
-	if (r) {
-		DSSERR("failed to start device\n");
-		goto err0;
-	}
-
 	r = venc_power_on(dssdev);
 	if (r)
-		goto err1;
+		goto err0;
 
 	venc.wss_data = 0;
 
 	mutex_unlock(&venc.venc_lock);
 
 	return 0;
-err1:
-	omap_dss_stop_device(dssdev);
 err0:
 	mutex_unlock(&venc.venc_lock);
 	return r;
@@ -543,8 +535,6 @@ void omapdss_venc_display_disable(struct omap_dss_device *dssdev)
 
 	venc_power_off(dssdev);
 
-	omap_dss_stop_device(dssdev);
-
 	mutex_unlock(&venc.venc_lock);
 }
 
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index f8e0e64..3aa89c4 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -778,9 +778,6 @@ struct omap_dss_device *omap_dss_find_device(void *data,
 		int (*match)(struct omap_dss_device *dssdev, void *data));
 const char *omapdss_get_default_display_name(void);
 
-int omap_dss_start_device(struct omap_dss_device *dssdev);
-void omap_dss_stop_device(struct omap_dss_device *dssdev);
-
 void videomode_to_omap_video_timings(const struct videomode *vm,
 		struct omap_video_timings *ovt);
 void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
-- 
1.8.1.2

[PATCH 27/32] OMAPDSS: combine omap_dss_output into omap_dss_device

[Tomi Valkeinen]

We currently have omap_dss_device, which represents an external display
device, sometimes an external encoder, sometimes a panel. Then we have
omap_dss_output, which represents DSS's output encoder.

In the future with new display device model, we construct a video
pipeline from the display blocks. To accomplish this, all the blocks
need to be presented by the same entity.

Thus, this patch combines omap_dss_output into omap_dss_device. Some of
the fields in omap_dss_output are already found in omap_dss_device, but
some are not. This means we'll have DSS output specific fields in
omap_dss_device, which is not very nice. However, it is easier to just
keep those output specific fields there for now, and after transition to
new display device model is made, they can be cleaned up easier than
could be done now.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/gpu/drm/omapdrm/omap_crtc.c |  4 +--
 drivers/gpu/drm/omapdrm/omap_drv.c  |  2 +-
 drivers/video/omap2/dss/apply.c     |  6 ++--
 drivers/video/omap2/dss/core.c      |  4 +--
 drivers/video/omap2/dss/dpi.c       | 12 +++----
 drivers/video/omap2/dss/dsi.c       | 18 +++++-----
 drivers/video/omap2/dss/dss.h       |  4 +--
 drivers/video/omap2/dss/hdmi.c      | 12 +++----
 drivers/video/omap2/dss/output.c    | 32 +++++++++---------
 drivers/video/omap2/dss/rfbi.c      | 14 ++++----
 drivers/video/omap2/dss/sdi.c       | 12 +++----
 drivers/video/omap2/dss/venc.c      | 12 +++----
 include/video/omapdss.h             | 66 +++++++++++++++++--------------------
 13 files changed, 96 insertions(+), 102 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index b2ab2f5..4cec678 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -95,7 +95,7 @@ static struct omap_crtc *omap_crtcs[8];
 
 /* we can probably ignore these until we support command-mode panels: */
 static int omap_crtc_connect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	if (mgr->output)
 		return -EINVAL;
@@ -110,7 +110,7 @@ static int omap_crtc_connect(struct omap_overlay_manager *mgr,
 }
 
 static void omap_crtc_disconnect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	mgr->output->manager = NULL;
 	mgr->output = NULL;
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 58bd259..a72100c 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -259,7 +259,7 @@ static int omap_modeset_init(struct drm_device *dev)
 		struct drm_encoder *encoder = priv->encoders[i];
 		struct omap_dss_device *dssdev  					omap_encoder_get_dssdev(encoder);
-		struct omap_dss_output *output;
+		struct omap_dss_device *output;
 
 		output = omapdss_find_output_from_display(dssdev);
 
diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index ced656a..752b985 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -791,13 +791,13 @@ static void mgr_clear_shadow_dirty(struct omap_overlay_manager *mgr)
 }
 
 static int dss_mgr_connect_compat(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	return mgr->set_output(mgr, dst);
 }
 
 static void dss_mgr_disconnect_compat(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	mgr->unset_output(mgr);
 }
@@ -1166,7 +1166,7 @@ static void dss_mgr_get_info(struct omap_overlay_manager *mgr,
 }
 
 static int dss_mgr_set_output(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *output)
+		struct omap_dss_device *output)
 {
 	int r;
 
diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 98a688e..44493224 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -345,7 +345,7 @@ static int dss_driver_remove(struct device *dev)
 
 static int omapdss_default_connect(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 	struct omap_overlay_manager *mgr;
 	int r;
 
@@ -367,7 +367,7 @@ static int omapdss_default_connect(struct omap_dss_device *dssdev)
 
 static void omapdss_default_disconnect(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 	struct omap_overlay_manager *mgr;
 
 	out = dssdev->output;
diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index d369927..03d8afd 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -49,7 +49,7 @@ static struct {
 	struct dss_lcd_mgr_config mgr_config;
 	int data_lines;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 } dpi;
 
 static struct platform_device *dpi_get_dsidev(enum omap_channel channel)
@@ -348,7 +348,7 @@ static void dpi_config_lcd_manager(struct omap_overlay_manager *mgr)
 
 int omapdss_dpi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &dpi.output;
+	struct omap_dss_device *out = &dpi.output;
 	int r;
 
 	mutex_lock(&dpi.lock);
@@ -684,11 +684,11 @@ static int dpi_probe_pdata(struct platform_device *dpidev)
 
 static void dpi_init_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &dpi.output;
+	struct omap_dss_device *out = &dpi.output;
 
-	out->pdev = pdev;
+	out->dev = &pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_DPI;
-	out->type = OMAP_DISPLAY_TYPE_DPI;
+	out->output_type = OMAP_DISPLAY_TYPE_DPI;
 	out->name = "dpi.0";
 	out->dispc_channel = dpi_get_channel();
 
@@ -697,7 +697,7 @@ static void dpi_init_output(struct platform_device *pdev)
 
 static void __exit dpi_uninit_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &dpi.output;
+	struct omap_dss_device *out = &dpi.output;
 
 	dss_unregister_output(out);
 }
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index 892838e..9aafefc 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -363,7 +363,7 @@ struct dsi_data {
 	enum omap_dss_dsi_mode mode;
 	struct omap_dss_dsi_videomode_timings vm_timings;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 };
 
 struct dsi_packet_sent_handler_data {
@@ -383,12 +383,12 @@ static inline struct dsi_data *dsi_get_dsidrv_data(struct platform_device *dside
 
 static inline struct platform_device *dsi_get_dsidev_from_dssdev(struct omap_dss_device *dssdev)
 {
-	return dssdev->output->pdev;
+	return to_platform_device(dssdev->output->dev);
 }
 
 struct platform_device *dsi_get_dsidev_from_id(int module)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 	enum omap_dss_output_id	id;
 
 	switch (module) {
@@ -404,7 +404,7 @@ struct platform_device *dsi_get_dsidev_from_id(int module)
 
 	out = omap_dss_get_output(id);
 
-	return out ? out->pdev : NULL;
+	return out ? to_platform_device(out->dev) : NULL;
 }
 
 static inline void dsi_write_reg(struct platform_device *dsidev,
@@ -4133,7 +4133,7 @@ int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
 	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
 	struct omap_overlay_manager *mgr = dsi->output.manager;
 	int bpp = dsi_get_pixel_size(dsi->pix_fmt);
-	struct omap_dss_output *out = &dsi->output;
+	struct omap_dss_device *out = &dsi->output;
 	u8 data_type;
 	u16 word_count;
 	int r;
@@ -5415,13 +5415,13 @@ static int dsi_probe_pdata(struct platform_device *dsidev)
 static void dsi_init_output(struct platform_device *dsidev)
 {
 	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
-	struct omap_dss_output *out = &dsi->output;
+	struct omap_dss_device *out = &dsi->output;
 
-	out->pdev = dsidev;
+	out->dev = &dsidev->dev;
 	out->id = dsi->module_id = 0 ?
 			OMAP_DSS_OUTPUT_DSI1 : OMAP_DSS_OUTPUT_DSI2;
 
-	out->type = OMAP_DISPLAY_TYPE_DSI;
+	out->output_type = OMAP_DISPLAY_TYPE_DSI;
 	out->name = dsi->module_id = 0 ? "dsi.0" : "dsi.1";
 	out->dispc_channel = dsi_get_channel(dsi->module_id);
 
@@ -5431,7 +5431,7 @@ static void dsi_init_output(struct platform_device *dsidev)
 static void dsi_uninit_output(struct platform_device *dsidev)
 {
 	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
-	struct omap_dss_output *out = &dsi->output;
+	struct omap_dss_device *out = &dsi->output;
 
 	dss_unregister_output(out);
 }
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 03d729a..67a509e 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -180,8 +180,8 @@ void dss_copy_device_pdata(struct omap_dss_device *dst,
 		const struct omap_dss_device *src);
 
 /* output */
-void dss_register_output(struct omap_dss_output *out);
-void dss_unregister_output(struct omap_dss_output *out);
+void dss_register_output(struct omap_dss_device *out);
+void dss_unregister_output(struct omap_dss_device *out);
 
 /* display */
 int dss_suspend_all_devices(void);
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index e7fe182..e33e708 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -70,7 +70,7 @@ static struct {
 	int ls_oe_gpio;
 	int hpd_gpio;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 } hdmi;
 
 /*
@@ -720,7 +720,7 @@ bool omapdss_hdmi_detect(void)
 
 int omapdss_hdmi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &hdmi.output;
+	struct omap_dss_device *out = &hdmi.output;
 	int r = 0;
 
 	DSSDBG("ENTER hdmi_display_enable\n");
@@ -1035,11 +1035,11 @@ static int hdmi_probe_pdata(struct platform_device *pdev)
 
 static void hdmi_init_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &hdmi.output;
+	struct omap_dss_device *out = &hdmi.output;
 
-	out->pdev = pdev;
+	out->dev = &pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_HDMI;
-	out->type = OMAP_DISPLAY_TYPE_HDMI;
+	out->output_type = OMAP_DISPLAY_TYPE_HDMI;
 	out->name = "hdmi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
 
@@ -1048,7 +1048,7 @@ static void hdmi_init_output(struct platform_device *pdev)
 
 static void __exit hdmi_uninit_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &hdmi.output;
+	struct omap_dss_device *out = &hdmi.output;
 
 	dss_unregister_output(out);
 }
diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index a53b08b..cc81fec 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -27,7 +27,7 @@
 static LIST_HEAD(output_list);
 static DEFINE_MUTEX(output_lock);
 
-int omapdss_output_set_device(struct omap_dss_output *out,
+int omapdss_output_set_device(struct omap_dss_device *out,
 		struct omap_dss_device *dssdev)
 {
 	int r;
@@ -41,7 +41,7 @@ int omapdss_output_set_device(struct omap_dss_output *out,
 		goto err;
 	}
 
-	if (out->type != dssdev->type) {
+	if (out->output_type != dssdev->type) {
 		DSSERR("output type and display type don't match\n");
 		r = -EINVAL;
 		goto err;
@@ -60,7 +60,7 @@ err:
 }
 EXPORT_SYMBOL(omapdss_output_set_device);
 
-int omapdss_output_unset_device(struct omap_dss_output *out)
+int omapdss_output_unset_device(struct omap_dss_device *out)
 {
 	int r;
 
@@ -92,19 +92,19 @@ err:
 }
 EXPORT_SYMBOL(omapdss_output_unset_device);
 
-void dss_register_output(struct omap_dss_output *out)
+void dss_register_output(struct omap_dss_device *out)
 {
 	list_add_tail(&out->list, &output_list);
 }
 
-void dss_unregister_output(struct omap_dss_output *out)
+void dss_unregister_output(struct omap_dss_device *out)
 {
 	list_del(&out->list);
 }
 
-struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
+struct omap_dss_device *omap_dss_get_output(enum omap_dss_output_id id)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 
 	list_for_each_entry(out, &output_list, list) {
 		if (out->id = id)
@@ -115,9 +115,9 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
 }
 EXPORT_SYMBOL(omap_dss_get_output);
 
-struct omap_dss_output *omap_dss_find_output(const char *name)
+struct omap_dss_device *omap_dss_find_output(const char *name)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 
 	list_for_each_entry(out, &output_list, list) {
 		if (strcmp(out->name, name) = 0)
@@ -128,12 +128,12 @@ struct omap_dss_output *omap_dss_find_output(const char *name)
 }
 EXPORT_SYMBOL(omap_dss_find_output);
 
-struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node)
+struct omap_dss_device *omap_dss_find_output_by_node(struct device_node *node)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 
 	list_for_each_entry(out, &output_list, list) {
-		if (out->pdev->dev.of_node = node)
+		if (out->dev->of_node = node)
 			return out;
 	}
 
@@ -141,7 +141,7 @@ struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node)
 }
 EXPORT_SYMBOL(omap_dss_find_output_by_node);
 
-struct omap_dss_output *omapdss_find_output_from_display(struct omap_dss_device *dssdev)
+struct omap_dss_device *omapdss_find_output_from_display(struct omap_dss_device *dssdev)
 {
 	return dssdev->output;
 }
@@ -149,7 +149,7 @@ EXPORT_SYMBOL(omapdss_find_output_from_display);
 
 struct omap_overlay_manager *omapdss_find_mgr_from_display(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 
 	out = omapdss_find_output_from_display(dssdev);
 
@@ -180,14 +180,14 @@ void dss_uninstall_mgr_ops(void)
 EXPORT_SYMBOL(dss_uninstall_mgr_ops);
 
 int dss_mgr_connect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	return dss_mgr_ops->connect(mgr, dst);
 }
 EXPORT_SYMBOL(dss_mgr_connect);
 
 void dss_mgr_disconnect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	dss_mgr_ops->disconnect(mgr, dst);
 }
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index 30ff0e0..35836eb 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -117,7 +117,7 @@ static struct {
 	int data_lines;
 	struct rfbi_timings intf_timings;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 } rfbi;
 
 static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
@@ -890,7 +890,7 @@ static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 
 int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &rfbi.output;
+	struct omap_dss_device *out = &rfbi.output;
 	int r;
 
 	if (out = NULL || out->manager = NULL) {
@@ -925,7 +925,7 @@ EXPORT_SYMBOL(omapdss_rfbi_display_enable);
 
 void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &rfbi.output;
+	struct omap_dss_device *out = &rfbi.output;
 
 	dss_mgr_unregister_framedone_handler(out->manager,
 			framedone_callback, NULL);
@@ -1013,11 +1013,11 @@ static int rfbi_probe_pdata(struct platform_device *rfbidev)
 
 static void rfbi_init_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &rfbi.output;
+	struct omap_dss_device *out = &rfbi.output;
 
-	out->pdev = pdev;
+	out->dev = &pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_DBI;
-	out->type = OMAP_DISPLAY_TYPE_DBI;
+	out->output_type = OMAP_DISPLAY_TYPE_DBI;
 	out->name = "rfbi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
 
@@ -1026,7 +1026,7 @@ static void rfbi_init_output(struct platform_device *pdev)
 
 static void __exit rfbi_uninit_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &rfbi.output;
+	struct omap_dss_device *out = &rfbi.output;
 
 	dss_unregister_output(out);
 }
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index ce37c80..a226c37 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -41,7 +41,7 @@ static struct {
 	struct omap_video_timings timings;
 	int datapairs;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 } sdi;
 
 struct sdi_clk_calc_ctx {
@@ -127,7 +127,7 @@ static void sdi_config_lcd_manager(struct omap_dss_device *dssdev)
 
 int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &sdi.output;
+	struct omap_dss_device *out = &sdi.output;
 	struct omap_video_timings *t = &sdi.timings;
 	struct dss_clock_info dss_cinfo;
 	struct dispc_clock_info dispc_cinfo;
@@ -341,11 +341,11 @@ static int sdi_probe_pdata(struct platform_device *sdidev)
 
 static void sdi_init_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &sdi.output;
+	struct omap_dss_device *out = &sdi.output;
 
-	out->pdev = pdev;
+	out->dev = &pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_SDI;
-	out->type = OMAP_DISPLAY_TYPE_SDI;
+	out->output_type = OMAP_DISPLAY_TYPE_SDI;
 	out->name = "sdi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
 
@@ -354,7 +354,7 @@ static void sdi_init_output(struct platform_device *pdev)
 
 static void __exit sdi_uninit_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &sdi.output;
+	struct omap_dss_device *out = &sdi.output;
 
 	dss_unregister_output(out);
 }
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index bac904c..7bfcba4 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -304,7 +304,7 @@ static struct {
 	enum omap_dss_venc_type type;
 	bool invert_polarity;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 } venc;
 
 static inline void venc_write_reg(int idx, u32 val)
@@ -500,7 +500,7 @@ unsigned long venc_get_pixel_clock(void)
 
 int omapdss_venc_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &venc.output;
+	struct omap_dss_device *out = &venc.output;
 	int r;
 
 	DSSDBG("venc_display_enable\n");
@@ -785,11 +785,11 @@ static int venc_probe_pdata(struct platform_device *vencdev)
 
 static void venc_init_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &venc.output;
+	struct omap_dss_device *out = &venc.output;
 
-	out->pdev = pdev;
+	out->dev = &pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_VENC;
-	out->type = OMAP_DISPLAY_TYPE_VENC;
+	out->output_type = OMAP_DISPLAY_TYPE_VENC;
 	out->name = "venc.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
 
@@ -798,7 +798,7 @@ static void venc_init_output(struct platform_device *pdev)
 
 static void __exit venc_uninit_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &venc.output;
+	struct omap_dss_device *out = &venc.output;
 
 	dss_unregister_output(out);
 }
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 3aa89c4..5046264 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -515,7 +515,7 @@ struct omap_overlay_manager {
 	enum omap_dss_output_id supported_outputs;
 
 	/* dynamic fields */
-	struct omap_dss_output *output;
+	struct omap_dss_device *output;
 
 	/*
 	 * The following functions do not block:
@@ -529,7 +529,7 @@ struct omap_overlay_manager {
 	 */
 
 	int (*set_output)(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *output);
+		struct omap_dss_device *output);
 	int (*unset_output)(struct omap_overlay_manager *mgr);
 
 	int (*set_manager_info)(struct omap_overlay_manager *mgr,
@@ -572,29 +572,6 @@ struct omap_dss_writeback_info {
 	u8 pre_mult_alpha;
 };
 
-struct omap_dss_output {
-	struct list_head list;
-
-	const char *name;
-
-	/* display type supported by the output */
-	enum omap_display_type type;
-
-	/* DISPC channel for this output */
-	enum omap_channel dispc_channel;
-
-	/* output instance */
-	enum omap_dss_output_id id;
-
-	/* output's platform device pointer */
-	struct platform_device *pdev;
-
-	/* dynamic fields */
-	struct omap_overlay_manager *manager;
-
-	struct omap_dss_device *device;
-};
-
 struct omap_dss_device {
 	/* old device, to be removed */
 	struct device old_dev;
@@ -608,6 +585,7 @@ struct omap_dss_device {
 	char alias[16];
 
 	enum omap_display_type type;
+	enum omap_display_type output_type;
 
 	/* obsolete, to be removed */
 	enum omap_channel channel;
@@ -669,7 +647,7 @@ struct omap_dss_device {
 
 	enum omap_display_caps caps;
 
-	struct omap_dss_output *output;
+	struct omap_dss_device *output;
 
 	enum omap_dss_display_state state;
 
@@ -680,6 +658,22 @@ struct omap_dss_device {
 	void (*platform_disable)(struct omap_dss_device *dssdev);
 	int (*set_backlight)(struct omap_dss_device *dssdev, int level);
 	int (*get_backlight)(struct omap_dss_device *dssdev);
+
+
+	/* OMAP DSS output specific fields */
+
+	struct list_head list;
+
+	/* DISPC channel for this output */
+	enum omap_channel dispc_channel;
+
+	/* output instance */
+	enum omap_dss_output_id id;
+
+	/* dynamic fields */
+	struct omap_overlay_manager *manager;
+
+	struct omap_dss_device *device;
 };
 
 struct omap_dss_hdmi_data
@@ -797,14 +791,14 @@ struct omap_overlay_manager *omap_dss_get_overlay_manager(int num);
 int omap_dss_get_num_overlays(void);
 struct omap_overlay *omap_dss_get_overlay(int num);
 
-struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id);
-struct omap_dss_output *omap_dss_find_output(const char *name);
-struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node);
-int omapdss_output_set_device(struct omap_dss_output *out,
+struct omap_dss_device *omap_dss_get_output(enum omap_dss_output_id id);
+struct omap_dss_device *omap_dss_find_output(const char *name);
+struct omap_dss_device *omap_dss_find_output_by_node(struct device_node *node);
+int omapdss_output_set_device(struct omap_dss_device *out,
 		struct omap_dss_device *dssdev);
-int omapdss_output_unset_device(struct omap_dss_output *out);
+int omapdss_output_unset_device(struct omap_dss_device *out);
 
-struct omap_dss_output *omapdss_find_output_from_display(struct omap_dss_device *dssdev);
+struct omap_dss_device *omapdss_find_output_from_display(struct omap_dss_device *dssdev);
 struct omap_overlay_manager *omapdss_find_mgr_from_display(struct omap_dss_device *dssdev);
 
 void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
@@ -908,9 +902,9 @@ void omapdss_compat_uninit(void);
 
 struct dss_mgr_ops {
 	int (*connect)(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst);
+		struct omap_dss_device *dst);
 	void (*disconnect)(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst);
+		struct omap_dss_device *dst);
 
 	void (*start_update)(struct omap_overlay_manager *mgr);
 	int (*enable)(struct omap_overlay_manager *mgr);
@@ -929,9 +923,9 @@ int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops);
 void dss_uninstall_mgr_ops(void);
 
 int dss_mgr_connect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst);
+		struct omap_dss_device *dst);
 void dss_mgr_disconnect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst);
+		struct omap_dss_device *dst);
 void dss_mgr_set_timings(struct omap_overlay_manager *mgr,
 		const struct omap_video_timings *timings);
 void dss_mgr_set_lcd_config(struct omap_overlay_manager *mgr,
-- 
1.8.1.2

[PATCH 27/32] OMAPDSS: combine omap_dss_output into omap_dss_device

[Tomi Valkeinen]

We currently have omap_dss_device, which represents an external display
device, sometimes an external encoder, sometimes a panel. Then we have
omap_dss_output, which represents DSS's output encoder.

In the future with new display device model, we construct a video
pipeline from the display blocks. To accomplish this, all the blocks
need to be presented by the same entity.

Thus, this patch combines omap_dss_output into omap_dss_device. Some of
the fields in omap_dss_output are already found in omap_dss_device, but
some are not. This means we'll have DSS output specific fields in
omap_dss_device, which is not very nice. However, it is easier to just
keep those output specific fields there for now, and after transition to
new display device model is made, they can be cleaned up easier than
could be done now.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/gpu/drm/omapdrm/omap_crtc.c |  4 +--
 drivers/gpu/drm/omapdrm/omap_drv.c  |  2 +-
 drivers/video/omap2/dss/apply.c     |  6 ++--
 drivers/video/omap2/dss/core.c      |  4 +--
 drivers/video/omap2/dss/dpi.c       | 12 +++----
 drivers/video/omap2/dss/dsi.c       | 18 +++++-----
 drivers/video/omap2/dss/dss.h       |  4 +--
 drivers/video/omap2/dss/hdmi.c      | 12 +++----
 drivers/video/omap2/dss/output.c    | 32 +++++++++---------
 drivers/video/omap2/dss/rfbi.c      | 14 ++++----
 drivers/video/omap2/dss/sdi.c       | 12 +++----
 drivers/video/omap2/dss/venc.c      | 12 +++----
 include/video/omapdss.h             | 66 +++++++++++++++++--------------------
 13 files changed, 96 insertions(+), 102 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index b2ab2f5..4cec678 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -95,7 +95,7 @@ static struct omap_crtc *omap_crtcs[8];
 
 /* we can probably ignore these until we support command-mode panels: */
 static int omap_crtc_connect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	if (mgr->output)
 		return -EINVAL;
@@ -110,7 +110,7 @@ static int omap_crtc_connect(struct omap_overlay_manager *mgr,
 }
 
 static void omap_crtc_disconnect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	mgr->output->manager = NULL;
 	mgr->output = NULL;
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 58bd259..a72100c 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -259,7 +259,7 @@ static int omap_modeset_init(struct drm_device *dev)
 		struct drm_encoder *encoder = priv->encoders[i];
 		struct omap_dss_device *dssdev =
 					omap_encoder_get_dssdev(encoder);
-		struct omap_dss_output *output;
+		struct omap_dss_device *output;
 
 		output = omapdss_find_output_from_display(dssdev);
 
diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index ced656a..752b985 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -791,13 +791,13 @@ static void mgr_clear_shadow_dirty(struct omap_overlay_manager *mgr)
 }
 
 static int dss_mgr_connect_compat(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	return mgr->set_output(mgr, dst);
 }
 
 static void dss_mgr_disconnect_compat(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	mgr->unset_output(mgr);
 }
@@ -1166,7 +1166,7 @@ static void dss_mgr_get_info(struct omap_overlay_manager *mgr,
 }
 
 static int dss_mgr_set_output(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *output)
+		struct omap_dss_device *output)
 {
 	int r;
 
diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 98a688e..44493224 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -345,7 +345,7 @@ static int dss_driver_remove(struct device *dev)
 
 static int omapdss_default_connect(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 	struct omap_overlay_manager *mgr;
 	int r;
 
@@ -367,7 +367,7 @@ static int omapdss_default_connect(struct omap_dss_device *dssdev)
 
 static void omapdss_default_disconnect(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 	struct omap_overlay_manager *mgr;
 
 	out = dssdev->output;
diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index d369927..03d8afd 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -49,7 +49,7 @@ static struct {
 	struct dss_lcd_mgr_config mgr_config;
 	int data_lines;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 } dpi;
 
 static struct platform_device *dpi_get_dsidev(enum omap_channel channel)
@@ -348,7 +348,7 @@ static void dpi_config_lcd_manager(struct omap_overlay_manager *mgr)
 
 int omapdss_dpi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &dpi.output;
+	struct omap_dss_device *out = &dpi.output;
 	int r;
 
 	mutex_lock(&dpi.lock);
@@ -684,11 +684,11 @@ static int dpi_probe_pdata(struct platform_device *dpidev)
 
 static void dpi_init_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &dpi.output;
+	struct omap_dss_device *out = &dpi.output;
 
-	out->pdev = pdev;
+	out->dev = &pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_DPI;
-	out->type = OMAP_DISPLAY_TYPE_DPI;
+	out->output_type = OMAP_DISPLAY_TYPE_DPI;
 	out->name = "dpi.0";
 	out->dispc_channel = dpi_get_channel();
 
@@ -697,7 +697,7 @@ static void dpi_init_output(struct platform_device *pdev)
 
 static void __exit dpi_uninit_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &dpi.output;
+	struct omap_dss_device *out = &dpi.output;
 
 	dss_unregister_output(out);
 }
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index 892838e..9aafefc 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -363,7 +363,7 @@ struct dsi_data {
 	enum omap_dss_dsi_mode mode;
 	struct omap_dss_dsi_videomode_timings vm_timings;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 };
 
 struct dsi_packet_sent_handler_data {
@@ -383,12 +383,12 @@ static inline struct dsi_data *dsi_get_dsidrv_data(struct platform_device *dside
 
 static inline struct platform_device *dsi_get_dsidev_from_dssdev(struct omap_dss_device *dssdev)
 {
-	return dssdev->output->pdev;
+	return to_platform_device(dssdev->output->dev);
 }
 
 struct platform_device *dsi_get_dsidev_from_id(int module)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 	enum omap_dss_output_id	id;
 
 	switch (module) {
@@ -404,7 +404,7 @@ struct platform_device *dsi_get_dsidev_from_id(int module)
 
 	out = omap_dss_get_output(id);
 
-	return out ? out->pdev : NULL;
+	return out ? to_platform_device(out->dev) : NULL;
 }
 
 static inline void dsi_write_reg(struct platform_device *dsidev,
@@ -4133,7 +4133,7 @@ int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
 	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
 	struct omap_overlay_manager *mgr = dsi->output.manager;
 	int bpp = dsi_get_pixel_size(dsi->pix_fmt);
-	struct omap_dss_output *out = &dsi->output;
+	struct omap_dss_device *out = &dsi->output;
 	u8 data_type;
 	u16 word_count;
 	int r;
@@ -5415,13 +5415,13 @@ static int dsi_probe_pdata(struct platform_device *dsidev)
 static void dsi_init_output(struct platform_device *dsidev)
 {
 	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
-	struct omap_dss_output *out = &dsi->output;
+	struct omap_dss_device *out = &dsi->output;
 
-	out->pdev = dsidev;
+	out->dev = &dsidev->dev;
 	out->id = dsi->module_id == 0 ?
 			OMAP_DSS_OUTPUT_DSI1 : OMAP_DSS_OUTPUT_DSI2;
 
-	out->type = OMAP_DISPLAY_TYPE_DSI;
+	out->output_type = OMAP_DISPLAY_TYPE_DSI;
 	out->name = dsi->module_id == 0 ? "dsi.0" : "dsi.1";
 	out->dispc_channel = dsi_get_channel(dsi->module_id);
 
@@ -5431,7 +5431,7 @@ static void dsi_init_output(struct platform_device *dsidev)
 static void dsi_uninit_output(struct platform_device *dsidev)
 {
 	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
-	struct omap_dss_output *out = &dsi->output;
+	struct omap_dss_device *out = &dsi->output;
 
 	dss_unregister_output(out);
 }
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 03d729a..67a509e 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -180,8 +180,8 @@ void dss_copy_device_pdata(struct omap_dss_device *dst,
 		const struct omap_dss_device *src);
 
 /* output */
-void dss_register_output(struct omap_dss_output *out);
-void dss_unregister_output(struct omap_dss_output *out);
+void dss_register_output(struct omap_dss_device *out);
+void dss_unregister_output(struct omap_dss_device *out);
 
 /* display */
 int dss_suspend_all_devices(void);
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index e7fe182..e33e708 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -70,7 +70,7 @@ static struct {
 	int ls_oe_gpio;
 	int hpd_gpio;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 } hdmi;
 
 /*
@@ -720,7 +720,7 @@ bool omapdss_hdmi_detect(void)
 
 int omapdss_hdmi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &hdmi.output;
+	struct omap_dss_device *out = &hdmi.output;
 	int r = 0;
 
 	DSSDBG("ENTER hdmi_display_enable\n");
@@ -1035,11 +1035,11 @@ static int hdmi_probe_pdata(struct platform_device *pdev)
 
 static void hdmi_init_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &hdmi.output;
+	struct omap_dss_device *out = &hdmi.output;
 
-	out->pdev = pdev;
+	out->dev = &pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_HDMI;
-	out->type = OMAP_DISPLAY_TYPE_HDMI;
+	out->output_type = OMAP_DISPLAY_TYPE_HDMI;
 	out->name = "hdmi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
 
@@ -1048,7 +1048,7 @@ static void hdmi_init_output(struct platform_device *pdev)
 
 static void __exit hdmi_uninit_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &hdmi.output;
+	struct omap_dss_device *out = &hdmi.output;
 
 	dss_unregister_output(out);
 }
diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index a53b08b..cc81fec 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -27,7 +27,7 @@
 static LIST_HEAD(output_list);
 static DEFINE_MUTEX(output_lock);
 
-int omapdss_output_set_device(struct omap_dss_output *out,
+int omapdss_output_set_device(struct omap_dss_device *out,
 		struct omap_dss_device *dssdev)
 {
 	int r;
@@ -41,7 +41,7 @@ int omapdss_output_set_device(struct omap_dss_output *out,
 		goto err;
 	}
 
-	if (out->type != dssdev->type) {
+	if (out->output_type != dssdev->type) {
 		DSSERR("output type and display type don't match\n");
 		r = -EINVAL;
 		goto err;
@@ -60,7 +60,7 @@ err:
 }
 EXPORT_SYMBOL(omapdss_output_set_device);
 
-int omapdss_output_unset_device(struct omap_dss_output *out)
+int omapdss_output_unset_device(struct omap_dss_device *out)
 {
 	int r;
 
@@ -92,19 +92,19 @@ err:
 }
 EXPORT_SYMBOL(omapdss_output_unset_device);
 
-void dss_register_output(struct omap_dss_output *out)
+void dss_register_output(struct omap_dss_device *out)
 {
 	list_add_tail(&out->list, &output_list);
 }
 
-void dss_unregister_output(struct omap_dss_output *out)
+void dss_unregister_output(struct omap_dss_device *out)
 {
 	list_del(&out->list);
 }
 
-struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
+struct omap_dss_device *omap_dss_get_output(enum omap_dss_output_id id)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 
 	list_for_each_entry(out, &output_list, list) {
 		if (out->id == id)
@@ -115,9 +115,9 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
 }
 EXPORT_SYMBOL(omap_dss_get_output);
 
-struct omap_dss_output *omap_dss_find_output(const char *name)
+struct omap_dss_device *omap_dss_find_output(const char *name)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 
 	list_for_each_entry(out, &output_list, list) {
 		if (strcmp(out->name, name) == 0)
@@ -128,12 +128,12 @@ struct omap_dss_output *omap_dss_find_output(const char *name)
 }
 EXPORT_SYMBOL(omap_dss_find_output);
 
-struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node)
+struct omap_dss_device *omap_dss_find_output_by_node(struct device_node *node)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 
 	list_for_each_entry(out, &output_list, list) {
-		if (out->pdev->dev.of_node == node)
+		if (out->dev->of_node == node)
 			return out;
 	}
 
@@ -141,7 +141,7 @@ struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node)
 }
 EXPORT_SYMBOL(omap_dss_find_output_by_node);
 
-struct omap_dss_output *omapdss_find_output_from_display(struct omap_dss_device *dssdev)
+struct omap_dss_device *omapdss_find_output_from_display(struct omap_dss_device *dssdev)
 {
 	return dssdev->output;
 }
@@ -149,7 +149,7 @@ EXPORT_SYMBOL(omapdss_find_output_from_display);
 
 struct omap_overlay_manager *omapdss_find_mgr_from_display(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out;
+	struct omap_dss_device *out;
 
 	out = omapdss_find_output_from_display(dssdev);
 
@@ -180,14 +180,14 @@ void dss_uninstall_mgr_ops(void)
 EXPORT_SYMBOL(dss_uninstall_mgr_ops);
 
 int dss_mgr_connect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	return dss_mgr_ops->connect(mgr, dst);
 }
 EXPORT_SYMBOL(dss_mgr_connect);
 
 void dss_mgr_disconnect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst)
+		struct omap_dss_device *dst)
 {
 	dss_mgr_ops->disconnect(mgr, dst);
 }
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index 30ff0e0..35836eb 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -117,7 +117,7 @@ static struct {
 	int data_lines;
 	struct rfbi_timings intf_timings;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 } rfbi;
 
 static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
@@ -890,7 +890,7 @@ static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 
 int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &rfbi.output;
+	struct omap_dss_device *out = &rfbi.output;
 	int r;
 
 	if (out == NULL || out->manager == NULL) {
@@ -925,7 +925,7 @@ EXPORT_SYMBOL(omapdss_rfbi_display_enable);
 
 void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &rfbi.output;
+	struct omap_dss_device *out = &rfbi.output;
 
 	dss_mgr_unregister_framedone_handler(out->manager,
 			framedone_callback, NULL);
@@ -1013,11 +1013,11 @@ static int rfbi_probe_pdata(struct platform_device *rfbidev)
 
 static void rfbi_init_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &rfbi.output;
+	struct omap_dss_device *out = &rfbi.output;
 
-	out->pdev = pdev;
+	out->dev = &pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_DBI;
-	out->type = OMAP_DISPLAY_TYPE_DBI;
+	out->output_type = OMAP_DISPLAY_TYPE_DBI;
 	out->name = "rfbi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
 
@@ -1026,7 +1026,7 @@ static void rfbi_init_output(struct platform_device *pdev)
 
 static void __exit rfbi_uninit_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &rfbi.output;
+	struct omap_dss_device *out = &rfbi.output;
 
 	dss_unregister_output(out);
 }
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index ce37c80..a226c37 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -41,7 +41,7 @@ static struct {
 	struct omap_video_timings timings;
 	int datapairs;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 } sdi;
 
 struct sdi_clk_calc_ctx {
@@ -127,7 +127,7 @@ static void sdi_config_lcd_manager(struct omap_dss_device *dssdev)
 
 int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &sdi.output;
+	struct omap_dss_device *out = &sdi.output;
 	struct omap_video_timings *t = &sdi.timings;
 	struct dss_clock_info dss_cinfo;
 	struct dispc_clock_info dispc_cinfo;
@@ -341,11 +341,11 @@ static int sdi_probe_pdata(struct platform_device *sdidev)
 
 static void sdi_init_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &sdi.output;
+	struct omap_dss_device *out = &sdi.output;
 
-	out->pdev = pdev;
+	out->dev = &pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_SDI;
-	out->type = OMAP_DISPLAY_TYPE_SDI;
+	out->output_type = OMAP_DISPLAY_TYPE_SDI;
 	out->name = "sdi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
 
@@ -354,7 +354,7 @@ static void sdi_init_output(struct platform_device *pdev)
 
 static void __exit sdi_uninit_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &sdi.output;
+	struct omap_dss_device *out = &sdi.output;
 
 	dss_unregister_output(out);
 }
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index bac904c..7bfcba4 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -304,7 +304,7 @@ static struct {
 	enum omap_dss_venc_type type;
 	bool invert_polarity;
 
-	struct omap_dss_output output;
+	struct omap_dss_device output;
 } venc;
 
 static inline void venc_write_reg(int idx, u32 val)
@@ -500,7 +500,7 @@ unsigned long venc_get_pixel_clock(void)
 
 int omapdss_venc_display_enable(struct omap_dss_device *dssdev)
 {
-	struct omap_dss_output *out = &venc.output;
+	struct omap_dss_device *out = &venc.output;
 	int r;
 
 	DSSDBG("venc_display_enable\n");
@@ -785,11 +785,11 @@ static int venc_probe_pdata(struct platform_device *vencdev)
 
 static void venc_init_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &venc.output;
+	struct omap_dss_device *out = &venc.output;
 
-	out->pdev = pdev;
+	out->dev = &pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_VENC;
-	out->type = OMAP_DISPLAY_TYPE_VENC;
+	out->output_type = OMAP_DISPLAY_TYPE_VENC;
 	out->name = "venc.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
 
@@ -798,7 +798,7 @@ static void venc_init_output(struct platform_device *pdev)
 
 static void __exit venc_uninit_output(struct platform_device *pdev)
 {
-	struct omap_dss_output *out = &venc.output;
+	struct omap_dss_device *out = &venc.output;
 
 	dss_unregister_output(out);
 }
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 3aa89c4..5046264 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -515,7 +515,7 @@ struct omap_overlay_manager {
 	enum omap_dss_output_id supported_outputs;
 
 	/* dynamic fields */
-	struct omap_dss_output *output;
+	struct omap_dss_device *output;
 
 	/*
 	 * The following functions do not block:
@@ -529,7 +529,7 @@ struct omap_overlay_manager {
 	 */
 
 	int (*set_output)(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *output);
+		struct omap_dss_device *output);
 	int (*unset_output)(struct omap_overlay_manager *mgr);
 
 	int (*set_manager_info)(struct omap_overlay_manager *mgr,
@@ -572,29 +572,6 @@ struct omap_dss_writeback_info {
 	u8 pre_mult_alpha;
 };
 
-struct omap_dss_output {
-	struct list_head list;
-
-	const char *name;
-
-	/* display type supported by the output */
-	enum omap_display_type type;
-
-	/* DISPC channel for this output */
-	enum omap_channel dispc_channel;
-
-	/* output instance */
-	enum omap_dss_output_id id;
-
-	/* output's platform device pointer */
-	struct platform_device *pdev;
-
-	/* dynamic fields */
-	struct omap_overlay_manager *manager;
-
-	struct omap_dss_device *device;
-};
-
 struct omap_dss_device {
 	/* old device, to be removed */
 	struct device old_dev;
@@ -608,6 +585,7 @@ struct omap_dss_device {
 	char alias[16];
 
 	enum omap_display_type type;
+	enum omap_display_type output_type;
 
 	/* obsolete, to be removed */
 	enum omap_channel channel;
@@ -669,7 +647,7 @@ struct omap_dss_device {
 
 	enum omap_display_caps caps;
 
-	struct omap_dss_output *output;
+	struct omap_dss_device *output;
 
 	enum omap_dss_display_state state;
 
@@ -680,6 +658,22 @@ struct omap_dss_device {
 	void (*platform_disable)(struct omap_dss_device *dssdev);
 	int (*set_backlight)(struct omap_dss_device *dssdev, int level);
 	int (*get_backlight)(struct omap_dss_device *dssdev);
+
+
+	/* OMAP DSS output specific fields */
+
+	struct list_head list;
+
+	/* DISPC channel for this output */
+	enum omap_channel dispc_channel;
+
+	/* output instance */
+	enum omap_dss_output_id id;
+
+	/* dynamic fields */
+	struct omap_overlay_manager *manager;
+
+	struct omap_dss_device *device;
 };
 
 struct omap_dss_hdmi_data
@@ -797,14 +791,14 @@ struct omap_overlay_manager *omap_dss_get_overlay_manager(int num);
 int omap_dss_get_num_overlays(void);
 struct omap_overlay *omap_dss_get_overlay(int num);
 
-struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id);
-struct omap_dss_output *omap_dss_find_output(const char *name);
-struct omap_dss_output *omap_dss_find_output_by_node(struct device_node *node);
-int omapdss_output_set_device(struct omap_dss_output *out,
+struct omap_dss_device *omap_dss_get_output(enum omap_dss_output_id id);
+struct omap_dss_device *omap_dss_find_output(const char *name);
+struct omap_dss_device *omap_dss_find_output_by_node(struct device_node *node);
+int omapdss_output_set_device(struct omap_dss_device *out,
 		struct omap_dss_device *dssdev);
-int omapdss_output_unset_device(struct omap_dss_output *out);
+int omapdss_output_unset_device(struct omap_dss_device *out);
 
-struct omap_dss_output *omapdss_find_output_from_display(struct omap_dss_device *dssdev);
+struct omap_dss_device *omapdss_find_output_from_display(struct omap_dss_device *dssdev);
 struct omap_overlay_manager *omapdss_find_mgr_from_display(struct omap_dss_device *dssdev);
 
 void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
@@ -908,9 +902,9 @@ void omapdss_compat_uninit(void);
 
 struct dss_mgr_ops {
 	int (*connect)(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst);
+		struct omap_dss_device *dst);
 	void (*disconnect)(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst);
+		struct omap_dss_device *dst);
 
 	void (*start_update)(struct omap_overlay_manager *mgr);
 	int (*enable)(struct omap_overlay_manager *mgr);
@@ -929,9 +923,9 @@ int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops);
 void dss_uninstall_mgr_ops(void);
 
 int dss_mgr_connect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst);
+		struct omap_dss_device *dst);
 void dss_mgr_disconnect(struct omap_overlay_manager *mgr,
-		struct omap_dss_output *dst);
+		struct omap_dss_device *dst);
 void dss_mgr_set_timings(struct omap_overlay_manager *mgr,
 		const struct omap_video_timings *timings);
 void dss_mgr_set_lcd_config(struct omap_overlay_manager *mgr,
-- 
1.8.1.2

[PATCH 28/32] OMAPDSS: omapdss.h: add owner field to omap_dss_device

[Tomi Valkeinen]

Add struct module *owner field to omap_dss_device, which points to the
module containing the ops for this omap_dss_device. This will be used to
manage the ref count for the module.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 include/video/omapdss.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 5046264..c32d90e 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -579,6 +579,8 @@ struct omap_dss_device {
 	/* new device, pointer to panel device */
 	struct device *dev;
 
+	struct module *owner;
+
 	struct list_head panel_list;
 
 	/* alias in the form of "display%d" */
-- 
1.8.1.2

[PATCH 28/32] OMAPDSS: omapdss.h: add owner field to omap_dss_device

[Tomi Valkeinen]

Add struct module *owner field to omap_dss_device, which points to the
module containing the ops for this omap_dss_device. This will be used to
manage the ref count for the module.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 include/video/omapdss.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 5046264..c32d90e 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -579,6 +579,8 @@ struct omap_dss_device {
 	/* new device, pointer to panel device */
 	struct device *dev;
 
+	struct module *owner;
+
 	struct list_head panel_list;
 
 	/* alias in the form of "display%d" */
-- 
1.8.1.2

[PATCH 29/32] OMAPDSS: add module_get/put to omap_dss_get/put_device()

[Tomi Valkeinen]

omap_dss_get_device() should be called for omap_dss_device before it is
used to increase its refcount. Currently we only increase the refcount
for the underlying device.

This patch adds managing the ref count to the underlying module also,
which contains the ops for the omap_dss_device.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/display.c | 13 +++++++++++--
 include/video/omapdss.h           |  2 +-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 8096764..0daf3e3 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -158,15 +158,24 @@ void omapdss_unregister_display(struct omap_dss_device *dssdev)
 }
 EXPORT_SYMBOL(omapdss_unregister_display);
 
-void omap_dss_get_device(struct omap_dss_device *dssdev)
+struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev)
 {
-	get_device(dssdev->dev);
+	if (!try_module_get(dssdev->owner))
+		return NULL;
+
+	if (get_device(dssdev->dev) = NULL) {
+		module_put(dssdev->owner);
+		return NULL;
+	}
+
+	return dssdev;
 }
 EXPORT_SYMBOL(omap_dss_get_device);
 
 void omap_dss_put_device(struct omap_dss_device *dssdev)
 {
 	put_device(dssdev->dev);
+	module_put(dssdev->owner);
 }
 EXPORT_SYMBOL(omap_dss_put_device);
 
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index c32d90e..b2e6160 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -766,7 +766,7 @@ void omap_dss_unregister_driver(struct omap_dss_driver *);
 int omapdss_register_display(struct omap_dss_device *dssdev);
 void omapdss_unregister_display(struct omap_dss_device *dssdev);
 
-void omap_dss_get_device(struct omap_dss_device *dssdev);
+struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev);
 void omap_dss_put_device(struct omap_dss_device *dssdev);
 #define for_each_dss_dev(d) while ((d = omap_dss_get_next_device(d)) != NULL)
 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from);
-- 
1.8.1.2

[PATCH 29/32] OMAPDSS: add module_get/put to omap_dss_get/put_device()

[Tomi Valkeinen]

omap_dss_get_device() should be called for omap_dss_device before it is
used to increase its refcount. Currently we only increase the refcount
for the underlying device.

This patch adds managing the ref count to the underlying module also,
which contains the ops for the omap_dss_device.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/display.c | 13 +++++++++++--
 include/video/omapdss.h           |  2 +-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 8096764..0daf3e3 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -158,15 +158,24 @@ void omapdss_unregister_display(struct omap_dss_device *dssdev)
 }
 EXPORT_SYMBOL(omapdss_unregister_display);
 
-void omap_dss_get_device(struct omap_dss_device *dssdev)
+struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev)
 {
-	get_device(dssdev->dev);
+	if (!try_module_get(dssdev->owner))
+		return NULL;
+
+	if (get_device(dssdev->dev) == NULL) {
+		module_put(dssdev->owner);
+		return NULL;
+	}
+
+	return dssdev;
 }
 EXPORT_SYMBOL(omap_dss_get_device);
 
 void omap_dss_put_device(struct omap_dss_device *dssdev)
 {
 	put_device(dssdev->dev);
+	module_put(dssdev->owner);
 }
 EXPORT_SYMBOL(omap_dss_put_device);
 
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index c32d90e..b2e6160 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -766,7 +766,7 @@ void omap_dss_unregister_driver(struct omap_dss_driver *);
 int omapdss_register_display(struct omap_dss_device *dssdev);
 void omapdss_unregister_display(struct omap_dss_device *dssdev);
 
-void omap_dss_get_device(struct omap_dss_device *dssdev);
+struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev);
 void omap_dss_put_device(struct omap_dss_device *dssdev);
 #define for_each_dss_dev(d) while ((d = omap_dss_get_next_device(d)) != NULL)
 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from);
-- 
1.8.1.2

[PATCH 30/32] OMAPDSS: add THIS_MODULE owner to DSS outputs

[Tomi Valkeinen]

Setup the owner field for DSS output's omap_dss_device so that module
refcounting works.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dpi.c  | 1 +
 drivers/video/omap2/dss/dsi.c  | 1 +
 drivers/video/omap2/dss/hdmi.c | 1 +
 drivers/video/omap2/dss/rfbi.c | 1 +
 drivers/video/omap2/dss/sdi.c  | 1 +
 drivers/video/omap2/dss/venc.c | 1 +
 6 files changed, 6 insertions(+)

diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index 03d8afd..0afbcd5 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -691,6 +691,7 @@ static void dpi_init_output(struct platform_device *pdev)
 	out->output_type = OMAP_DISPLAY_TYPE_DPI;
 	out->name = "dpi.0";
 	out->dispc_channel = dpi_get_channel();
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index 9aafefc..2f90019 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -5424,6 +5424,7 @@ static void dsi_init_output(struct platform_device *dsidev)
 	out->output_type = OMAP_DISPLAY_TYPE_DSI;
 	out->name = dsi->module_id = 0 ? "dsi.0" : "dsi.1";
 	out->dispc_channel = dsi_get_channel(dsi->module_id);
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index e33e708..1a7b179 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -1042,6 +1042,7 @@ static void hdmi_init_output(struct platform_device *pdev)
 	out->output_type = OMAP_DISPLAY_TYPE_HDMI;
 	out->name = "hdmi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index 35836eb..f18c946 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -1020,6 +1020,7 @@ static void rfbi_init_output(struct platform_device *pdev)
 	out->output_type = OMAP_DISPLAY_TYPE_DBI;
 	out->name = "rfbi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index a226c37..10268a2 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -348,6 +348,7 @@ static void sdi_init_output(struct platform_device *pdev)
 	out->output_type = OMAP_DISPLAY_TYPE_SDI;
 	out->name = "sdi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index 7bfcba4..0deb771 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -792,6 +792,7 @@ static void venc_init_output(struct platform_device *pdev)
 	out->output_type = OMAP_DISPLAY_TYPE_VENC;
 	out->name = "venc.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
-- 
1.8.1.2

[PATCH 30/32] OMAPDSS: add THIS_MODULE owner to DSS outputs

[Tomi Valkeinen]

Setup the owner field for DSS output's omap_dss_device so that module
refcounting works.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/dss/dpi.c  | 1 +
 drivers/video/omap2/dss/dsi.c  | 1 +
 drivers/video/omap2/dss/hdmi.c | 1 +
 drivers/video/omap2/dss/rfbi.c | 1 +
 drivers/video/omap2/dss/sdi.c  | 1 +
 drivers/video/omap2/dss/venc.c | 1 +
 6 files changed, 6 insertions(+)

diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index 03d8afd..0afbcd5 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -691,6 +691,7 @@ static void dpi_init_output(struct platform_device *pdev)
 	out->output_type = OMAP_DISPLAY_TYPE_DPI;
 	out->name = "dpi.0";
 	out->dispc_channel = dpi_get_channel();
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index 9aafefc..2f90019 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -5424,6 +5424,7 @@ static void dsi_init_output(struct platform_device *dsidev)
 	out->output_type = OMAP_DISPLAY_TYPE_DSI;
 	out->name = dsi->module_id == 0 ? "dsi.0" : "dsi.1";
 	out->dispc_channel = dsi_get_channel(dsi->module_id);
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index e33e708..1a7b179 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -1042,6 +1042,7 @@ static void hdmi_init_output(struct platform_device *pdev)
 	out->output_type = OMAP_DISPLAY_TYPE_HDMI;
 	out->name = "hdmi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index 35836eb..f18c946 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -1020,6 +1020,7 @@ static void rfbi_init_output(struct platform_device *pdev)
 	out->output_type = OMAP_DISPLAY_TYPE_DBI;
 	out->name = "rfbi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index a226c37..10268a2 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -348,6 +348,7 @@ static void sdi_init_output(struct platform_device *pdev)
 	out->output_type = OMAP_DISPLAY_TYPE_SDI;
 	out->name = "sdi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index 7bfcba4..0deb771 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -792,6 +792,7 @@ static void venc_init_output(struct platform_device *pdev)
 	out->output_type = OMAP_DISPLAY_TYPE_VENC;
 	out->name = "venc.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
+	out->owner = THIS_MODULE;
 
 	dss_register_output(out);
 }
-- 
1.8.1.2

[PATCH 31/32] OMAPDSS: output: increase refcount in find_output funcs

[Tomi Valkeinen]

Now that omap_dss_output has been combined into omap_dss_device, we can
add ref counting for the relevant output functions also.

This patch adds omap_dss_get_device() calls to the various find_output()
style functions. This, of course, means that the users of those
find_output functions need to do a omap_dss_put_device() after use.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/gpu/drm/omapdrm/omap_drv.c |  2 ++
 drivers/video/omap2/dss/output.c   | 13 +++++++++----
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index a72100c..4c0bc40 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -277,6 +277,8 @@ static int omap_modeset_init(struct drm_device *dev)
 			if (supported_outputs & output->id)
 				encoder->possible_crtcs |= (1 << id);
 		}
+
+		omap_dss_put_device(output);
 	}
 
 	DBG("registered %d planes, %d crtcs, %d encoders and %d connectors\n",
diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index cc81fec..9ad7d21 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -121,7 +121,7 @@ struct omap_dss_device *omap_dss_find_output(const char *name)
 
 	list_for_each_entry(out, &output_list, list) {
 		if (strcmp(out->name, name) = 0)
-			return out;
+			return omap_dss_get_device(out);
 	}
 
 	return NULL;
@@ -134,7 +134,7 @@ struct omap_dss_device *omap_dss_find_output_by_node(struct device_node *node)
 
 	list_for_each_entry(out, &output_list, list) {
 		if (out->dev->of_node = node)
-			return out;
+			return omap_dss_get_device(out);
 	}
 
 	return NULL;
@@ -143,20 +143,25 @@ EXPORT_SYMBOL(omap_dss_find_output_by_node);
 
 struct omap_dss_device *omapdss_find_output_from_display(struct omap_dss_device *dssdev)
 {
-	return dssdev->output;
+	return omap_dss_get_device(dssdev->output);
 }
 EXPORT_SYMBOL(omapdss_find_output_from_display);
 
 struct omap_overlay_manager *omapdss_find_mgr_from_display(struct omap_dss_device *dssdev)
 {
 	struct omap_dss_device *out;
+	struct omap_overlay_manager *mgr;
 
 	out = omapdss_find_output_from_display(dssdev);
 
 	if (out = NULL)
 		return NULL;
 
-	return out->manager;
+	mgr = out->manager;
+
+	omap_dss_put_device(out);
+
+	return mgr;
 }
 EXPORT_SYMBOL(omapdss_find_mgr_from_display);
 
-- 
1.8.1.2

[PATCH 31/32] OMAPDSS: output: increase refcount in find_output funcs

[Tomi Valkeinen]

Now that omap_dss_output has been combined into omap_dss_device, we can
add ref counting for the relevant output functions also.

This patch adds omap_dss_get_device() calls to the various find_output()
style functions. This, of course, means that the users of those
find_output functions need to do a omap_dss_put_device() after use.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/gpu/drm/omapdrm/omap_drv.c |  2 ++
 drivers/video/omap2/dss/output.c   | 13 +++++++++----
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index a72100c..4c0bc40 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -277,6 +277,8 @@ static int omap_modeset_init(struct drm_device *dev)
 			if (supported_outputs & output->id)
 				encoder->possible_crtcs |= (1 << id);
 		}
+
+		omap_dss_put_device(output);
 	}
 
 	DBG("registered %d planes, %d crtcs, %d encoders and %d connectors\n",
diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
index cc81fec..9ad7d21 100644
--- a/drivers/video/omap2/dss/output.c
+++ b/drivers/video/omap2/dss/output.c
@@ -121,7 +121,7 @@ struct omap_dss_device *omap_dss_find_output(const char *name)
 
 	list_for_each_entry(out, &output_list, list) {
 		if (strcmp(out->name, name) == 0)
-			return out;
+			return omap_dss_get_device(out);
 	}
 
 	return NULL;
@@ -134,7 +134,7 @@ struct omap_dss_device *omap_dss_find_output_by_node(struct device_node *node)
 
 	list_for_each_entry(out, &output_list, list) {
 		if (out->dev->of_node == node)
-			return out;
+			return omap_dss_get_device(out);
 	}
 
 	return NULL;
@@ -143,20 +143,25 @@ EXPORT_SYMBOL(omap_dss_find_output_by_node);
 
 struct omap_dss_device *omapdss_find_output_from_display(struct omap_dss_device *dssdev)
 {
-	return dssdev->output;
+	return omap_dss_get_device(dssdev->output);
 }
 EXPORT_SYMBOL(omapdss_find_output_from_display);
 
 struct omap_overlay_manager *omapdss_find_mgr_from_display(struct omap_dss_device *dssdev)
 {
 	struct omap_dss_device *out;
+	struct omap_overlay_manager *mgr;
 
 	out = omapdss_find_output_from_display(dssdev);
 
 	if (out == NULL)
 		return NULL;
 
-	return out->manager;
+	mgr = out->manager;
+
+	omap_dss_put_device(out);
+
+	return mgr;
 }
 EXPORT_SYMBOL(omapdss_find_mgr_from_display);
 
-- 
1.8.1.2

[PATCH 32/32] OMAPFB: use EPROBE_DEFER if default display is not present

[Tomi Valkeinen]

Currently omapfb returns EPROBE_DEFER if no displays have been probed at
the time omapfb is probed. However, sometimes some of the displays have
been probed at that time, but not all. We can't return EPROBE_DEFER in
that case, because then one missing driver would cause omapfb to defer
always, preventing any display from working.

However, if the user has defined a default display, we can presume that
the driver for that display is eventually loaded. Thus, this patch
changes omapfb to return EPROBE_DEFER in case default display is not
found.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/omapfb/omapfb-main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index eacbafa..0c0d078 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -2500,7 +2500,7 @@ static int omapfb_probe(struct platform_device *pdev)
 
 	if (def_display = NULL) {
 		dev_err(fbdev->dev, "failed to find default display\n");
-		r = -EINVAL;
+		r = -EPROBE_DEFER;
 		goto cleanup;
 	}
 
-- 
1.8.1.2

[PATCH 32/32] OMAPFB: use EPROBE_DEFER if default display is not present

[Tomi Valkeinen]

Currently omapfb returns EPROBE_DEFER if no displays have been probed at
the time omapfb is probed. However, sometimes some of the displays have
been probed at that time, but not all. We can't return EPROBE_DEFER in
that case, because then one missing driver would cause omapfb to defer
always, preventing any display from working.

However, if the user has defined a default display, we can presume that
the driver for that display is eventually loaded. Thus, this patch
changes omapfb to return EPROBE_DEFER in case default display is not
found.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/video/omap2/omapfb/omapfb-main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index eacbafa..0c0d078 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -2500,7 +2500,7 @@ static int omapfb_probe(struct platform_device *pdev)
 
 	if (def_display == NULL) {
 		dev_err(fbdev->dev, "failed to find default display\n");
-		r = -EINVAL;
+		r = -EPROBE_DEFER;
 		goto cleanup;
 	}
 
-- 
1.8.1.2

Re: [PATCH 03/32] OMAPDSS: add omap_dss_find_output()

[Jean-Christophe PLAGNIOL-VILLARD]

On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> Add a support function to find a DSS output by given name. This is used
> in later patches to link the panels to DSS outputs.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>  drivers/video/omap2/dss/output.c | 13 +++++++++++++
>  include/video/omapdss.h          |  1 +
>  2 files changed, 14 insertions(+)
> 
> diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
> index 5214df6..3274628 100644
> --- a/drivers/video/omap2/dss/output.c
> +++ b/drivers/video/omap2/dss/output.c
> @@ -115,6 +115,19 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
>  }
>  EXPORT_SYMBOL(omap_dss_get_output);
GPL please
>  
> +struct omap_dss_output *omap_dss_find_output(const char *name)
> +{
> +	struct omap_dss_output *out;
> +
> +	list_for_each_entry(out, &output_list, list) {
> +		if (strcmp(out->name, name) = 0)
> +			return out;
> +	}
> +
> +	return NULL;
> +}
I this in so many drivers could we have a macro to generate such function?

> +EXPORT_SYMBOL(omap_dss_find_output);
ditto GPL

Best Regards,
J.
> +
>  static const struct dss_mgr_ops *dss_mgr_ops;
>  
>  int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)
> diff --git a/include/video/omapdss.h b/include/video/omapdss.h
> index d5f1fff..aad47a2 100644
> --- a/include/video/omapdss.h
> +++ b/include/video/omapdss.h
> @@ -779,6 +779,7 @@ int omap_dss_get_num_overlays(void);
>  struct omap_overlay *omap_dss_get_overlay(int num);
>  
>  struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id);
> +struct omap_dss_output *omap_dss_find_output(const char *name);
>  int omapdss_output_set_device(struct omap_dss_output *out,
>  		struct omap_dss_device *dssdev);
>  int omapdss_output_unset_device(struct omap_dss_output *out);
> -- 
> 1.8.1.2
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
> the body of a message to majordomo@vger.kernel.org
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Re: [PATCH 03/32] OMAPDSS: add omap_dss_find_output()

[Jean-Christophe PLAGNIOL-VILLARD]

On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> Add a support function to find a DSS output by given name. This is used
> in later patches to link the panels to DSS outputs.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>  drivers/video/omap2/dss/output.c | 13 +++++++++++++
>  include/video/omapdss.h          |  1 +
>  2 files changed, 14 insertions(+)
> 
> diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
> index 5214df6..3274628 100644
> --- a/drivers/video/omap2/dss/output.c
> +++ b/drivers/video/omap2/dss/output.c
> @@ -115,6 +115,19 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
>  }
>  EXPORT_SYMBOL(omap_dss_get_output);
GPL please
>  
> +struct omap_dss_output *omap_dss_find_output(const char *name)
> +{
> +	struct omap_dss_output *out;
> +
> +	list_for_each_entry(out, &output_list, list) {
> +		if (strcmp(out->name, name) == 0)
> +			return out;
> +	}
> +
> +	return NULL;
> +}
I this in so many drivers could we have a macro to generate such function?

> +EXPORT_SYMBOL(omap_dss_find_output);
ditto GPL

Best Regards,
J.
> +
>  static const struct dss_mgr_ops *dss_mgr_ops;
>  
>  int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)
> diff --git a/include/video/omapdss.h b/include/video/omapdss.h
> index d5f1fff..aad47a2 100644
> --- a/include/video/omapdss.h
> +++ b/include/video/omapdss.h
> @@ -779,6 +779,7 @@ int omap_dss_get_num_overlays(void);
>  struct omap_overlay *omap_dss_get_overlay(int num);
>  
>  struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id);
> +struct omap_dss_output *omap_dss_find_output(const char *name);
>  int omapdss_output_set_device(struct omap_dss_output *out,
>  		struct omap_dss_device *dssdev);
>  int omapdss_output_unset_device(struct omap_dss_output *out);
> -- 
> 1.8.1.2
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Jean-Christophe PLAGNIOL-VILLARD]

On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> When using DT, dss device does not have platform data. However,
> dss_get_ctx_loss_count() uses dss device's platform data to find the
> get_ctx_loss_count function pointer.
> 
> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
> platform data from the omapdss device, which is a "virtual" device and
> always has platform data.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>  drivers/video/omap2/dss/dss.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
> index 94f66f9..bd01608 100644
> --- a/drivers/video/omap2/dss/dss.c
> +++ b/drivers/video/omap2/dss/dss.c
> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
>  
>  int dss_get_ctx_loss_count(void)
>  {
> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
> +	struct platform_device *core_pdev = dss_get_core_pdev();
> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;

	how about store the pdata in the drivers internal struct and if !dt
	you ust do this

	dss_dev->pdata = *pdev->dev.platform_data;

	to copy it and we do not alloc it for dt

Best Regards,
J.
>  	int cnt;
>  
>  	if (!board_data->get_context_loss_count)
> -- 
> 1.8.1.2
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Jean-Christophe PLAGNIOL-VILLARD]

On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> When using DT, dss device does not have platform data. However,
> dss_get_ctx_loss_count() uses dss device's platform data to find the
> get_ctx_loss_count function pointer.
> 
> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
> platform data from the omapdss device, which is a "virtual" device and
> always has platform data.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>  drivers/video/omap2/dss/dss.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
> index 94f66f9..bd01608 100644
> --- a/drivers/video/omap2/dss/dss.c
> +++ b/drivers/video/omap2/dss/dss.c
> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
>  
>  int dss_get_ctx_loss_count(void)
>  {
> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
> +	struct platform_device *core_pdev = dss_get_core_pdev();
> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;

	how about store the pdata in the drivers internal struct and if !dt
	you ust do this

	dss_dev->pdata = *pdev->dev.platform_data;

	to copy it and we do not alloc it for dt

Best Regards,
J.
>  	int cnt;
>  
>  	if (!board_data->get_context_loss_count)
> -- 
> 1.8.1.2
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Jean-Christophe PLAGNIOL-VILLARD]

On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> On some platforms DPI requires a regulator to be enabled to power up the
> output pins. This regulator is, for some reason, currently attached to
> the virtual omapdss device, instead of the DPI device. This does not
> work for DT, as the regulator mappings need to be described in the DT
> data, and the virtual omapdss device is not present there.
> 
> Fix the issue by acquiring the regulator in the DPI device. To retain
> compatibility with the current board files, the old method of getting
> the regulator is kept. The old method can be removed when the board
> files have been changed to pass the regulator to DPI.

as discuss with Arnd we should handle regular enable and disable at device
probe for every device as we do for pinctrl

Best Regards,
J.
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>  drivers/video/omap2/dss/dpi.c | 21 ++++++++++++++++++---
>  1 file changed, 18 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
> index ef8fca2..43f6b26 100644
> --- a/drivers/video/omap2/dss/dpi.c
> +++ b/drivers/video/omap2/dss/dpi.c
> @@ -37,7 +37,10 @@
>  #include "dss_features.h"
>  
>  static struct {
> +	struct platform_device *pdev;
> +
>  	struct regulator *vdds_dsi_reg;
> +	bool vdds_dsi_from_core;
>  	struct platform_device *dsidev;
>  
>  	struct mutex lock;
> @@ -583,10 +586,15 @@ static int dpi_init_display(struct omap_dss_device *dssdev)
>  		struct regulator *vdds_dsi;
>  
>  		vdds_dsi = dss_get_vdds_dsi();
> -
>  		if (IS_ERR(vdds_dsi)) {
> -			DSSERR("can't get VDDS_DSI regulator\n");
> -			return PTR_ERR(vdds_dsi);
> +			vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
> +			if (IS_ERR(vdds_dsi)) {
> +				DSSERR("can't get VDDS_DSI regulator\n");
> +				return PTR_ERR(vdds_dsi);
> +			}
> +			dpi.vdds_dsi_from_core = false;
> +		} else {
> +			dpi.vdds_dsi_from_core = true;
>  		}
>  
>  		dpi.vdds_dsi_reg = vdds_dsi;
> @@ -702,6 +710,8 @@ static int omap_dpi_probe(struct platform_device *pdev)
>  {
>  	int r;
>  
> +	dpi.pdev = pdev;
> +
>  	mutex_init(&dpi.lock);
>  
>  	dpi_init_output(pdev);
> @@ -725,6 +735,11 @@ static int __exit omap_dpi_remove(struct platform_device *pdev)
>  
>  	dpi_uninit_output(pdev);
>  
> +	if (dpi.vdds_dsi_reg != NULL && dpi.vdds_dsi_from_core = false) {
> +		regulator_put(dpi.vdds_dsi_reg);
> +		dpi.vdds_dsi_reg = NULL;
> +	}
> +
>  	return 0;
>  }
>  
> -- 
> 1.8.1.2
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Jean-Christophe PLAGNIOL-VILLARD]

On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> On some platforms DPI requires a regulator to be enabled to power up the
> output pins. This regulator is, for some reason, currently attached to
> the virtual omapdss device, instead of the DPI device. This does not
> work for DT, as the regulator mappings need to be described in the DT
> data, and the virtual omapdss device is not present there.
> 
> Fix the issue by acquiring the regulator in the DPI device. To retain
> compatibility with the current board files, the old method of getting
> the regulator is kept. The old method can be removed when the board
> files have been changed to pass the regulator to DPI.

as discuss with Arnd we should handle regular enable and disable at device
probe for every device as we do for pinctrl

Best Regards,
J.
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>  drivers/video/omap2/dss/dpi.c | 21 ++++++++++++++++++---
>  1 file changed, 18 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
> index ef8fca2..43f6b26 100644
> --- a/drivers/video/omap2/dss/dpi.c
> +++ b/drivers/video/omap2/dss/dpi.c
> @@ -37,7 +37,10 @@
>  #include "dss_features.h"
>  
>  static struct {
> +	struct platform_device *pdev;
> +
>  	struct regulator *vdds_dsi_reg;
> +	bool vdds_dsi_from_core;
>  	struct platform_device *dsidev;
>  
>  	struct mutex lock;
> @@ -583,10 +586,15 @@ static int dpi_init_display(struct omap_dss_device *dssdev)
>  		struct regulator *vdds_dsi;
>  
>  		vdds_dsi = dss_get_vdds_dsi();
> -
>  		if (IS_ERR(vdds_dsi)) {
> -			DSSERR("can't get VDDS_DSI regulator\n");
> -			return PTR_ERR(vdds_dsi);
> +			vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
> +			if (IS_ERR(vdds_dsi)) {
> +				DSSERR("can't get VDDS_DSI regulator\n");
> +				return PTR_ERR(vdds_dsi);
> +			}
> +			dpi.vdds_dsi_from_core = false;
> +		} else {
> +			dpi.vdds_dsi_from_core = true;
>  		}
>  
>  		dpi.vdds_dsi_reg = vdds_dsi;
> @@ -702,6 +710,8 @@ static int omap_dpi_probe(struct platform_device *pdev)
>  {
>  	int r;
>  
> +	dpi.pdev = pdev;
> +
>  	mutex_init(&dpi.lock);
>  
>  	dpi_init_output(pdev);
> @@ -725,6 +735,11 @@ static int __exit omap_dpi_remove(struct platform_device *pdev)
>  
>  	dpi_uninit_output(pdev);
>  
> +	if (dpi.vdds_dsi_reg != NULL && dpi.vdds_dsi_from_core == false) {
> +		regulator_put(dpi.vdds_dsi_reg);
> +		dpi.vdds_dsi_reg = NULL;
> +	}
> +
>  	return 0;
>  }
>  
> -- 
> 1.8.1.2
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Tomi Valkeinen]

[-- Attachment #1: Type: text/plain, Size: 2260 bytes --]

On 30/05/13 14:09, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
>> When using DT, dss device does not have platform data. However,
>> dss_get_ctx_loss_count() uses dss device's platform data to find the
>> get_ctx_loss_count function pointer.
>>
>> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
>> platform data from the omapdss device, which is a "virtual" device and
>> always has platform data.
>>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> ---
>>  drivers/video/omap2/dss/dss.c | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
>> index 94f66f9..bd01608 100644
>> --- a/drivers/video/omap2/dss/dss.c
>> +++ b/drivers/video/omap2/dss/dss.c
>> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
>>  
>>  int dss_get_ctx_loss_count(void)
>>  {
>> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
>> +	struct platform_device *core_pdev = dss_get_core_pdev();
>> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
> 
> 	how about store the pdata in the drivers internal struct and if !dt
> 	you ust do this
> 
> 	dss_dev->pdata = *pdev->dev.platform_data;
> 
> 	to copy it and we do not alloc it for dt

It's not quite that simple. We need some OMAP arch functions (like
get_ctx_loss_count here) that are not currently exposed via any other
method to drivers except passing a function pointer with platform data.
We need that also when booting with DT.

We have a bunch of devices for the display subsystem hardware blocks,
like the "dss" here. When booting with DT, these blocks are represented
in the DT data, and do not have platform data.

We also have a "virtual" device, "omapdss", which doesn't match any hw
block. It's created in the arch setup stage. It's really a legacy thing,
but with DT it can be used conveniently to pass the platform data.

The problem this patch fixes is that we used to pass the arch functions
for each of those HW block drivers. But with DT, we need to get the arch
functions from the "omapdss" device, gotten with dss_get_core_pdev().

 Tomi



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Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Tomi Valkeinen]

[-- Attachment #1: Type: text/plain, Size: 2260 bytes --]

On 30/05/13 14:09, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
>> When using DT, dss device does not have platform data. However,
>> dss_get_ctx_loss_count() uses dss device's platform data to find the
>> get_ctx_loss_count function pointer.
>>
>> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
>> platform data from the omapdss device, which is a "virtual" device and
>> always has platform data.
>>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> ---
>>  drivers/video/omap2/dss/dss.c | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
>> index 94f66f9..bd01608 100644
>> --- a/drivers/video/omap2/dss/dss.c
>> +++ b/drivers/video/omap2/dss/dss.c
>> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
>>  
>>  int dss_get_ctx_loss_count(void)
>>  {
>> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
>> +	struct platform_device *core_pdev = dss_get_core_pdev();
>> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
> 
> 	how about store the pdata in the drivers internal struct and if !dt
> 	you ust do this
> 
> 	dss_dev->pdata = *pdev->dev.platform_data;
> 
> 	to copy it and we do not alloc it for dt

It's not quite that simple. We need some OMAP arch functions (like
get_ctx_loss_count here) that are not currently exposed via any other
method to drivers except passing a function pointer with platform data.
We need that also when booting with DT.

We have a bunch of devices for the display subsystem hardware blocks,
like the "dss" here. When booting with DT, these blocks are represented
in the DT data, and do not have platform data.

We also have a "virtual" device, "omapdss", which doesn't match any hw
block. It's created in the arch setup stage. It's really a legacy thing,
but with DT it can be used conveniently to pass the platform data.

The problem this patch fixes is that we used to pass the arch functions
for each of those HW block drivers. But with DT, we need to get the arch
functions from the "omapdss" device, gotten with dss_get_core_pdev().

 Tomi



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Re: [PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Tomi Valkeinen]

[-- Attachment #1: Type: text/plain, Size: 1370 bytes --]

On 30/05/13 14:12, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
>> On some platforms DPI requires a regulator to be enabled to power up the
>> output pins. This regulator is, for some reason, currently attached to
>> the virtual omapdss device, instead of the DPI device. This does not
>> work for DT, as the regulator mappings need to be described in the DT
>> data, and the virtual omapdss device is not present there.
>>
>> Fix the issue by acquiring the regulator in the DPI device. To retain
>> compatibility with the current board files, the old method of getting
>> the regulator is kept. The old method can be removed when the board
>> files have been changed to pass the regulator to DPI.
> 
> as discuss with Arnd we should handle regular enable and disable at device
> probe for every device as we do for pinctrl

I'm not sure what you mean. Enable of what? The regulator? Why would we
enable it in the device's probe, as the device may never even be used?

Or do you mean regulator_get()? Doing that in DPI driver's probe is
problematic, as not all boards have any panels using DPI, and thus they
may not have the regulator set up, but all boards have the DPI device
added automatically. So for those boards the DPI probe would fail,
always, if we tried to get the regulator.

 Tomi



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Re: [PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Tomi Valkeinen]

[-- Attachment #1: Type: text/plain, Size: 1370 bytes --]

On 30/05/13 14:12, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
>> On some platforms DPI requires a regulator to be enabled to power up the
>> output pins. This regulator is, for some reason, currently attached to
>> the virtual omapdss device, instead of the DPI device. This does not
>> work for DT, as the regulator mappings need to be described in the DT
>> data, and the virtual omapdss device is not present there.
>>
>> Fix the issue by acquiring the regulator in the DPI device. To retain
>> compatibility with the current board files, the old method of getting
>> the regulator is kept. The old method can be removed when the board
>> files have been changed to pass the regulator to DPI.
> 
> as discuss with Arnd we should handle regular enable and disable at device
> probe for every device as we do for pinctrl

I'm not sure what you mean. Enable of what? The regulator? Why would we
enable it in the device's probe, as the device may never even be used?

Or do you mean regulator_get()? Doing that in DPI driver's probe is
problematic, as not all boards have any panels using DPI, and thus they
may not have the regulator set up, but all boards have the DPI device
added automatically. So for those boards the DPI probe would fail,
always, if we tried to get the regulator.

 Tomi



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Re: [PATCH 03/32] OMAPDSS: add omap_dss_find_output()

[Tomi Valkeinen]

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On 30/05/13 14:07, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
>> Add a support function to find a DSS output by given name. This is used
>> in later patches to link the panels to DSS outputs.
>>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> ---
>>  drivers/video/omap2/dss/output.c | 13 +++++++++++++
>>  include/video/omapdss.h          |  1 +
>>  2 files changed, 14 insertions(+)
>>
>> diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
>> index 5214df6..3274628 100644
>> --- a/drivers/video/omap2/dss/output.c
>> +++ b/drivers/video/omap2/dss/output.c
>> @@ -115,6 +115,19 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
>>  }
>>  EXPORT_SYMBOL(omap_dss_get_output);
> GPL please

The omapdss driver uses EXPORT_SYMBOL. I don't want to start mixing both
EXPORT_SYMBOLs and EXPORT_SYMBOL_GPLs.

>> +struct omap_dss_output *omap_dss_find_output(const char *name)
>> +{
>> +	struct omap_dss_output *out;
>> +
>> +	list_for_each_entry(out, &output_list, list) {
>> +		if (strcmp(out->name, name) == 0)
>> +			return out;
>> +	}
>> +
>> +	return NULL;
>> +}
> I this in so many drivers could we have a macro to generate such function?

What would that help? Wouldn't it just increase the code size of the kernel?

 Tomi



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Re: [PATCH 03/32] OMAPDSS: add omap_dss_find_output()

[Tomi Valkeinen]

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On 30/05/13 14:07, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
>> Add a support function to find a DSS output by given name. This is used
>> in later patches to link the panels to DSS outputs.
>>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> ---
>>  drivers/video/omap2/dss/output.c | 13 +++++++++++++
>>  include/video/omapdss.h          |  1 +
>>  2 files changed, 14 insertions(+)
>>
>> diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
>> index 5214df6..3274628 100644
>> --- a/drivers/video/omap2/dss/output.c
>> +++ b/drivers/video/omap2/dss/output.c
>> @@ -115,6 +115,19 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
>>  }
>>  EXPORT_SYMBOL(omap_dss_get_output);
> GPL please

The omapdss driver uses EXPORT_SYMBOL. I don't want to start mixing both
EXPORT_SYMBOLs and EXPORT_SYMBOL_GPLs.

>> +struct omap_dss_output *omap_dss_find_output(const char *name)
>> +{
>> +	struct omap_dss_output *out;
>> +
>> +	list_for_each_entry(out, &output_list, list) {
>> +		if (strcmp(out->name, name) == 0)
>> +			return out;
>> +	}
>> +
>> +	return NULL;
>> +}
> I this in so many drivers could we have a macro to generate such function?

What would that help? Wouldn't it just increase the code size of the kernel?

 Tomi



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Re: [PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Arnd Bergmann]

On Thursday 30 May 2013, Tomi Valkeinen wrote:
>   On 30/05/13 14:12, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> >> On some platforms DPI requires a regulator to be enabled to power up the
> >> output pins. This regulator is, for some reason, currently attached to
> >> the virtual omapdss device, instead of the DPI device. This does not
> >> work for DT, as the regulator mappings need to be described in the DT
> >> data, and the virtual omapdss device is not present there.
> >>
> >> Fix the issue by acquiring the regulator in the DPI device. To retain
> >> compatibility with the current board files, the old method of getting
> >> the regulator is kept. The old method can be removed when the board
> >> files have been changed to pass the regulator to DPI.
> > 
> > as discuss with Arnd we should handle regular enable and disable at device
> > probe for every device as we do for pinctrl
> 
> I'm not sure what you mean. Enable of what? The regulator? Why would we
> enable it in the device's probe, as the device may never even be used?

It's an idea I had a while ago, but not yet discussed in the open.

Jean-Christophe just posted patches to move the mapping of interrupt numbers
into platform_drv_probe(), just before calling the driver ->probe() callback,
and we already have similar code to set up the default pinctrl state of
a device before calling probe().

This can be extended to further subsystems, but that has to be done
carefully to avoid regressions. Ideally we would move a lot of boilerplate
code out of the driver specific ->probe() function into common code.
Possible candidates for this include:

* calling devm_request_mem_region for the "reg" property
* calling devm_ioremap on the "reg" property"
* calling devm_gpio_request for all gpio lines
* calling devm_regulator_get on all regulators
* calling devm_reset_control_get on all reset lines
* calling devm_dma_request_slave_channel on all dma channels
* calling devm_of_pwm_get for all pwm channels
* ...

For most of these (maybe all), I think we need some form of opt-in
model on the driver side because there are cases where aquiring some
of these resources is not mandatory, and it only works if the driver
is using DT probing.

IF we want to do this, it also needs a lot of thought, and we shouldn't
do it carelessly. We might also need some extra infrastructure in revres
to simplify access to the resources we got from the OF node.

The irq resources are particularly trivial because we already claim
them in of_platform_populate, so moving that to platform_drv_probe()
is straightforward and solves existing bugs without creating a huge
regression potential, but it's harder for the others.

	Arnd

Re: [PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Arnd Bergmann]

On Thursday 30 May 2013, Tomi Valkeinen wrote:
>   On 30/05/13 14:12, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> >> On some platforms DPI requires a regulator to be enabled to power up the
> >> output pins. This regulator is, for some reason, currently attached to
> >> the virtual omapdss device, instead of the DPI device. This does not
> >> work for DT, as the regulator mappings need to be described in the DT
> >> data, and the virtual omapdss device is not present there.
> >>
> >> Fix the issue by acquiring the regulator in the DPI device. To retain
> >> compatibility with the current board files, the old method of getting
> >> the regulator is kept. The old method can be removed when the board
> >> files have been changed to pass the regulator to DPI.
> > 
> > as discuss with Arnd we should handle regular enable and disable at device
> > probe for every device as we do for pinctrl
> 
> I'm not sure what you mean. Enable of what? The regulator? Why would we
> enable it in the device's probe, as the device may never even be used?

It's an idea I had a while ago, but not yet discussed in the open.

Jean-Christophe just posted patches to move the mapping of interrupt numbers
into platform_drv_probe(), just before calling the driver ->probe() callback,
and we already have similar code to set up the default pinctrl state of
a device before calling probe().

This can be extended to further subsystems, but that has to be done
carefully to avoid regressions. Ideally we would move a lot of boilerplate
code out of the driver specific ->probe() function into common code.
Possible candidates for this include:

* calling devm_request_mem_region for the "reg" property
* calling devm_ioremap on the "reg" property"
* calling devm_gpio_request for all gpio lines
* calling devm_regulator_get on all regulators
* calling devm_reset_control_get on all reset lines
* calling devm_dma_request_slave_channel on all dma channels
* calling devm_of_pwm_get for all pwm channels
* ...

For most of these (maybe all), I think we need some form of opt-in
model on the driver side because there are cases where aquiring some
of these resources is not mandatory, and it only works if the driver
is using DT probing.

IF we want to do this, it also needs a lot of thought, and we shouldn't
do it carelessly. We might also need some extra infrastructure in revres
to simplify access to the resources we got from the OF node.

The irq resources are particularly trivial because we already claim
them in of_platform_populate, so moving that to platform_drv_probe()
is straightforward and solves existing bugs without creating a huge
regression potential, but it's harder for the others.

	Arnd

Re: [PATCH 03/32] OMAPDSS: add omap_dss_find_output()

[Jean-Christophe PLAGNIOL-VILLARD]

On 14:40 Thu 30 May     , Tomi Valkeinen wrote:
> On 30/05/13 14:07, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> >> Add a support function to find a DSS output by given name. This is used
> >> in later patches to link the panels to DSS outputs.
> >>
> >> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> >> ---
> >>  drivers/video/omap2/dss/output.c | 13 +++++++++++++
> >>  include/video/omapdss.h          |  1 +
> >>  2 files changed, 14 insertions(+)
> >>
> >> diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
> >> index 5214df6..3274628 100644
> >> --- a/drivers/video/omap2/dss/output.c
> >> +++ b/drivers/video/omap2/dss/output.c
> >> @@ -115,6 +115,19 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
> >>  }
> >>  EXPORT_SYMBOL(omap_dss_get_output);
> > GPL please
> 
> The omapdss driver uses EXPORT_SYMBOL. I don't want to start mixing both
> EXPORT_SYMBOLs and EXPORT_SYMBOL_GPLs.

I do not like EXPORT_SYMBOL at all
I stringly prefer to switch all of them to _GPL

but will not refuse the patch for this in this case
> 
> >> +struct omap_dss_output *omap_dss_find_output(const char *name)
> >> +{
> >> +	struct omap_dss_output *out;
> >> +
> >> +	list_for_each_entry(out, &output_list, list) {
> >> +		if (strcmp(out->name, name) = 0)
> >> +			return out;
> >> +	}
> >> +
> >> +	return NULL;
> >> +}
> > I this in so many drivers could we have a macro to generate such function?
> 
> What would that help? Wouldn't it just increase the code size of the kernel?

increase no as it's not an inline function but a macro to generate the
function
after help yes but people may not like so as you wish

Best Regards,
J.
> 
>  Tomi
> 
> 

Re: [PATCH 03/32] OMAPDSS: add omap_dss_find_output()

[Jean-Christophe PLAGNIOL-VILLARD]

On 14:40 Thu 30 May     , Tomi Valkeinen wrote:
> On 30/05/13 14:07, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> >> Add a support function to find a DSS output by given name. This is used
> >> in later patches to link the panels to DSS outputs.
> >>
> >> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> >> ---
> >>  drivers/video/omap2/dss/output.c | 13 +++++++++++++
> >>  include/video/omapdss.h          |  1 +
> >>  2 files changed, 14 insertions(+)
> >>
> >> diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
> >> index 5214df6..3274628 100644
> >> --- a/drivers/video/omap2/dss/output.c
> >> +++ b/drivers/video/omap2/dss/output.c
> >> @@ -115,6 +115,19 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
> >>  }
> >>  EXPORT_SYMBOL(omap_dss_get_output);
> > GPL please
> 
> The omapdss driver uses EXPORT_SYMBOL. I don't want to start mixing both
> EXPORT_SYMBOLs and EXPORT_SYMBOL_GPLs.

I do not like EXPORT_SYMBOL at all
I stringly prefer to switch all of them to _GPL

but will not refuse the patch for this in this case
> 
> >> +struct omap_dss_output *omap_dss_find_output(const char *name)
> >> +{
> >> +	struct omap_dss_output *out;
> >> +
> >> +	list_for_each_entry(out, &output_list, list) {
> >> +		if (strcmp(out->name, name) == 0)
> >> +			return out;
> >> +	}
> >> +
> >> +	return NULL;
> >> +}
> > I this in so many drivers could we have a macro to generate such function?
> 
> What would that help? Wouldn't it just increase the code size of the kernel?

increase no as it's not an inline function but a macro to generate the
function
after help yes but people may not like so as you wish

Best Regards,
J.
> 
>  Tomi
> 
> 

Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Jean-Christophe PLAGNIOL-VILLARD]

On 14:28 Thu 30 May     , Tomi Valkeinen wrote:
> On 30/05/13 14:09, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> >> When using DT, dss device does not have platform data. However,
> >> dss_get_ctx_loss_count() uses dss device's platform data to find the
> >> get_ctx_loss_count function pointer.
> >>
> >> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
> >> platform data from the omapdss device, which is a "virtual" device and
> >> always has platform data.
> >>
> >> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> >> ---
> >>  drivers/video/omap2/dss/dss.c | 3 ++-
> >>  1 file changed, 2 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
> >> index 94f66f9..bd01608 100644
> >> --- a/drivers/video/omap2/dss/dss.c
> >> +++ b/drivers/video/omap2/dss/dss.c
> >> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
> >>  
> >>  int dss_get_ctx_loss_count(void)
> >>  {
> >> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
> >> +	struct platform_device *core_pdev = dss_get_core_pdev();
> >> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
> > 
> > 	how about store the pdata in the drivers internal struct and if !dt
> > 	you ust do this
> > 
> > 	dss_dev->pdata = *pdev->dev.platform_data;
> > 
> > 	to copy it and we do not alloc it for dt
> 
> It's not quite that simple. We need some OMAP arch functions (like
> get_ctx_loss_count here) that are not currently exposed via any other
> method to drivers except passing a function pointer with platform data.
> We need that also when booting with DT.
> 
> We have a bunch of devices for the display subsystem hardware blocks,
> like the "dss" here. When booting with DT, these blocks are represented
> in the DT data, and do not have platform data.
> 
> We also have a "virtual" device, "omapdss", which doesn't match any hw
> block. It's created in the arch setup stage. It's really a legacy thing,
> but with DT it can be used conveniently to pass the platform data.
> 
> The problem this patch fixes is that we used to pass the arch functions
> for each of those HW block drivers. But with DT, we need to get the arch
> functions from the "omapdss" device, gotten with dss_get_core_pdev().

ok

do not take it bad is it worth the effort those 54 patches?

is not better to work on DRM?
just an open question

Best Regards,
J.
> 
>  Tomi
> 
> 

Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Jean-Christophe PLAGNIOL-VILLARD]

On 14:28 Thu 30 May     , Tomi Valkeinen wrote:
> On 30/05/13 14:09, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> >> When using DT, dss device does not have platform data. However,
> >> dss_get_ctx_loss_count() uses dss device's platform data to find the
> >> get_ctx_loss_count function pointer.
> >>
> >> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
> >> platform data from the omapdss device, which is a "virtual" device and
> >> always has platform data.
> >>
> >> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> >> ---
> >>  drivers/video/omap2/dss/dss.c | 3 ++-
> >>  1 file changed, 2 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
> >> index 94f66f9..bd01608 100644
> >> --- a/drivers/video/omap2/dss/dss.c
> >> +++ b/drivers/video/omap2/dss/dss.c
> >> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
> >>  
> >>  int dss_get_ctx_loss_count(void)
> >>  {
> >> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
> >> +	struct platform_device *core_pdev = dss_get_core_pdev();
> >> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
> > 
> > 	how about store the pdata in the drivers internal struct and if !dt
> > 	you ust do this
> > 
> > 	dss_dev->pdata = *pdev->dev.platform_data;
> > 
> > 	to copy it and we do not alloc it for dt
> 
> It's not quite that simple. We need some OMAP arch functions (like
> get_ctx_loss_count here) that are not currently exposed via any other
> method to drivers except passing a function pointer with platform data.
> We need that also when booting with DT.
> 
> We have a bunch of devices for the display subsystem hardware blocks,
> like the "dss" here. When booting with DT, these blocks are represented
> in the DT data, and do not have platform data.
> 
> We also have a "virtual" device, "omapdss", which doesn't match any hw
> block. It's created in the arch setup stage. It's really a legacy thing,
> but with DT it can be used conveniently to pass the platform data.
> 
> The problem this patch fixes is that we used to pass the arch functions
> for each of those HW block drivers. But with DT, we need to get the arch
> functions from the "omapdss" device, gotten with dss_get_core_pdev().

ok

do not take it bad is it worth the effort those 54 patches?

is not better to work on DRM?
just an open question

Best Regards,
J.
> 
>  Tomi
> 
> 

Re: [PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Jean-Christophe PLAGNIOL-VILLARD]

On 15:05 Thu 30 May     , Arnd Bergmann wrote:
> On Thursday 30 May 2013, Tomi Valkeinen wrote:
> >   On 30/05/13 14:12, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > > On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> > >> On some platforms DPI requires a regulator to be enabled to power up the
> > >> output pins. This regulator is, for some reason, currently attached to
> > >> the virtual omapdss device, instead of the DPI device. This does not
> > >> work for DT, as the regulator mappings need to be described in the DT
> > >> data, and the virtual omapdss device is not present there.
> > >>
> > >> Fix the issue by acquiring the regulator in the DPI device. To retain
> > >> compatibility with the current board files, the old method of getting
> > >> the regulator is kept. The old method can be removed when the board
> > >> files have been changed to pass the regulator to DPI.
> > > 
> > > as discuss with Arnd we should handle regular enable and disable at device
> > > probe for every device as we do for pinctrl
> > 
> > I'm not sure what you mean. Enable of what? The regulator? Why would we
> > enable it in the device's probe, as the device may never even be used?
> 
> It's an idea I had a while ago, but not yet discussed in the open.
> 
> Jean-Christophe just posted patches to move the mapping of interrupt numbers
> into platform_drv_probe(), just before calling the driver ->probe() callback,
> and we already have similar code to set up the default pinctrl state of
> a device before calling probe().
> 
> This can be extended to further subsystems, but that has to be done
> carefully to avoid regressions. Ideally we would move a lot of boilerplate
> code out of the driver specific ->probe() function into common code.
> Possible candidates for this include:
> 
> * calling devm_request_mem_region for the "reg" property
> * calling devm_ioremap on the "reg" property"
> * calling devm_gpio_request for all gpio lines
> * calling devm_regulator_get on all regulators
> * calling devm_reset_control_get on all reset lines
> * calling devm_dma_request_slave_channel on all dma channels
> * calling devm_of_pwm_get for all pwm channels
> * ...
> 
> For most of these (maybe all), I think we need some form of opt-in
> model on the driver side because there are cases where aquiring some
> of these resources is not mandatory, and it only works if the driver
> is using DT probing.
> 
> IF we want to do this, it also needs a lot of thought, and we shouldn't
> do it carelessly. We might also need some extra infrastructure in revres
> to simplify access to the resources we got from the OF node.
> 
> The irq resources are particularly trivial because we already claim
> them in of_platform_populate, so moving that to platform_drv_probe()
> is straightforward and solves existing bugs without creating a huge
> regression potential, but it's harder for the others.

Yeah I agree with Arnd

we need to start to move this way but for DT only first and carefully

Best Regards,
J.
> 
> 	Arnd
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Jean-Christophe PLAGNIOL-VILLARD]

On 15:05 Thu 30 May     , Arnd Bergmann wrote:
> On Thursday 30 May 2013, Tomi Valkeinen wrote:
> >   On 30/05/13 14:12, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > > On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
> > >> On some platforms DPI requires a regulator to be enabled to power up the
> > >> output pins. This regulator is, for some reason, currently attached to
> > >> the virtual omapdss device, instead of the DPI device. This does not
> > >> work for DT, as the regulator mappings need to be described in the DT
> > >> data, and the virtual omapdss device is not present there.
> > >>
> > >> Fix the issue by acquiring the regulator in the DPI device. To retain
> > >> compatibility with the current board files, the old method of getting
> > >> the regulator is kept. The old method can be removed when the board
> > >> files have been changed to pass the regulator to DPI.
> > > 
> > > as discuss with Arnd we should handle regular enable and disable at device
> > > probe for every device as we do for pinctrl
> > 
> > I'm not sure what you mean. Enable of what? The regulator? Why would we
> > enable it in the device's probe, as the device may never even be used?
> 
> It's an idea I had a while ago, but not yet discussed in the open.
> 
> Jean-Christophe just posted patches to move the mapping of interrupt numbers
> into platform_drv_probe(), just before calling the driver ->probe() callback,
> and we already have similar code to set up the default pinctrl state of
> a device before calling probe().
> 
> This can be extended to further subsystems, but that has to be done
> carefully to avoid regressions. Ideally we would move a lot of boilerplate
> code out of the driver specific ->probe() function into common code.
> Possible candidates for this include:
> 
> * calling devm_request_mem_region for the "reg" property
> * calling devm_ioremap on the "reg" property"
> * calling devm_gpio_request for all gpio lines
> * calling devm_regulator_get on all regulators
> * calling devm_reset_control_get on all reset lines
> * calling devm_dma_request_slave_channel on all dma channels
> * calling devm_of_pwm_get for all pwm channels
> * ...
> 
> For most of these (maybe all), I think we need some form of opt-in
> model on the driver side because there are cases where aquiring some
> of these resources is not mandatory, and it only works if the driver
> is using DT probing.
> 
> IF we want to do this, it also needs a lot of thought, and we shouldn't
> do it carelessly. We might also need some extra infrastructure in revres
> to simplify access to the resources we got from the OF node.
> 
> The irq resources are particularly trivial because we already claim
> them in of_platform_populate, so moving that to platform_drv_probe()
> is straightforward and solves existing bugs without creating a huge
> regression potential, but it's harder for the others.

Yeah I agree with Arnd

we need to start to move this way but for DT only first and carefully

Best Regards,
J.
> 
> 	Arnd
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Tomi Valkeinen]

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On 30/05/13 18:43, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 14:28 Thu 30 May     , Tomi Valkeinen wrote:
>> On 30/05/13 14:09, Jean-Christophe PLAGNIOL-VILLARD wrote:
>>> On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
>>>> When using DT, dss device does not have platform data. However,
>>>> dss_get_ctx_loss_count() uses dss device's platform data to find the
>>>> get_ctx_loss_count function pointer.
>>>>
>>>> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
>>>> platform data from the omapdss device, which is a "virtual" device and
>>>> always has platform data.
>>>>
>>>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>>>> ---
>>>>  drivers/video/omap2/dss/dss.c | 3 ++-
>>>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
>>>> index 94f66f9..bd01608 100644
>>>> --- a/drivers/video/omap2/dss/dss.c
>>>> +++ b/drivers/video/omap2/dss/dss.c
>>>> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
>>>>  
>>>>  int dss_get_ctx_loss_count(void)
>>>>  {
>>>> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
>>>> +	struct platform_device *core_pdev = dss_get_core_pdev();
>>>> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
>>>
>>> 	how about store the pdata in the drivers internal struct and if !dt
>>> 	you ust do this
>>>
>>> 	dss_dev->pdata = *pdev->dev.platform_data;
>>>
>>> 	to copy it and we do not alloc it for dt
>>
>> It's not quite that simple. We need some OMAP arch functions (like
>> get_ctx_loss_count here) that are not currently exposed via any other
>> method to drivers except passing a function pointer with platform data.
>> We need that also when booting with DT.
>>
>> We have a bunch of devices for the display subsystem hardware blocks,
>> like the "dss" here. When booting with DT, these blocks are represented
>> in the DT data, and do not have platform data.
>>
>> We also have a "virtual" device, "omapdss", which doesn't match any hw
>> block. It's created in the arch setup stage. It's really a legacy thing,
>> but with DT it can be used conveniently to pass the platform data.
>>
>> The problem this patch fixes is that we used to pass the arch functions
>> for each of those HW block drivers. But with DT, we need to get the arch
>> functions from the "omapdss" device, gotten with dss_get_core_pdev().
> 
> ok
> 
> do not take it bad is it worth the effort those 54 patches?
> 
> is not better to work on DRM?
> just an open question

Both omapfb and omapdrm use omapdss. omapdss provides the HW level
support, and also panel support. At some point in the future we'll
probably deprecate omapfb, and move wholly to omapdrm. At that point
omapdss and omapdrm can be merged together, simplifying the design.

And regarding the amount of the patches, there has been some bad design
decisions in the history of omapdss, and as it's a big driver (plus the
panel drivers), it takes quite a bit to fix these. There will be more
coming to convert the rest of the panel drivers, and also to implement
DT support. But those all also work for omapdrm, so it's not fbdev-only
stuff.

 Tomi



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Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Tomi Valkeinen]

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On 30/05/13 18:43, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 14:28 Thu 30 May     , Tomi Valkeinen wrote:
>> On 30/05/13 14:09, Jean-Christophe PLAGNIOL-VILLARD wrote:
>>> On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
>>>> When using DT, dss device does not have platform data. However,
>>>> dss_get_ctx_loss_count() uses dss device's platform data to find the
>>>> get_ctx_loss_count function pointer.
>>>>
>>>> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
>>>> platform data from the omapdss device, which is a "virtual" device and
>>>> always has platform data.
>>>>
>>>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>>>> ---
>>>>  drivers/video/omap2/dss/dss.c | 3 ++-
>>>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
>>>> index 94f66f9..bd01608 100644
>>>> --- a/drivers/video/omap2/dss/dss.c
>>>> +++ b/drivers/video/omap2/dss/dss.c
>>>> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
>>>>  
>>>>  int dss_get_ctx_loss_count(void)
>>>>  {
>>>> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
>>>> +	struct platform_device *core_pdev = dss_get_core_pdev();
>>>> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
>>>
>>> 	how about store the pdata in the drivers internal struct and if !dt
>>> 	you ust do this
>>>
>>> 	dss_dev->pdata = *pdev->dev.platform_data;
>>>
>>> 	to copy it and we do not alloc it for dt
>>
>> It's not quite that simple. We need some OMAP arch functions (like
>> get_ctx_loss_count here) that are not currently exposed via any other
>> method to drivers except passing a function pointer with platform data.
>> We need that also when booting with DT.
>>
>> We have a bunch of devices for the display subsystem hardware blocks,
>> like the "dss" here. When booting with DT, these blocks are represented
>> in the DT data, and do not have platform data.
>>
>> We also have a "virtual" device, "omapdss", which doesn't match any hw
>> block. It's created in the arch setup stage. It's really a legacy thing,
>> but with DT it can be used conveniently to pass the platform data.
>>
>> The problem this patch fixes is that we used to pass the arch functions
>> for each of those HW block drivers. But with DT, we need to get the arch
>> functions from the "omapdss" device, gotten with dss_get_core_pdev().
> 
> ok
> 
> do not take it bad is it worth the effort those 54 patches?
> 
> is not better to work on DRM?
> just an open question

Both omapfb and omapdrm use omapdss. omapdss provides the HW level
support, and also panel support. At some point in the future we'll
probably deprecate omapfb, and move wholly to omapdrm. At that point
omapdss and omapdrm can be merged together, simplifying the design.

And regarding the amount of the patches, there has been some bad design
decisions in the history of omapdss, and as it's a big driver (plus the
panel drivers), it takes quite a bit to fix these. There will be more
coming to convert the rest of the panel drivers, and also to implement
DT support. But those all also work for omapdrm, so it's not fbdev-only
stuff.

 Tomi



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Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Kevin Hilman]

Tomi Valkeinen <tomi.valkeinen@ti.com> writes:

> When using DT, dss device does not have platform data. However,
> dss_get_ctx_loss_count() uses dss device's platform data to find the
> get_ctx_loss_count function pointer.
>
> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
> platform data from the omapdss device, which is a "virtual" device and
> always has platform data.

Dumb question (since the DSS device model has always been beyond my
grasp): how/why does the virtual device still have platform_data on a DT
boot?

Also, this context_loss_count and DT boot is starting to get cumbersome,
and there's currently no (good) way of handling the context loss in a
generic way without pdata function pointers.

I'm starting to think we should move towards dropping this OMAP-specific
context loss counting, and just assume context is always lost.  If there
are performance problems, runtime PM autosuspend timeouts can be used to
avoid the transitions.

Or, on some devices, I suspect comparing a few registers against their
power-on reset values might be a quicker way of detecting lost context
and would avoid having to call into platform code all together.

Kevin

> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>  drivers/video/omap2/dss/dss.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
> index 94f66f9..bd01608 100644
> --- a/drivers/video/omap2/dss/dss.c
> +++ b/drivers/video/omap2/dss/dss.c
> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
>  
>  int dss_get_ctx_loss_count(void)
>  {
> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
> +	struct platform_device *core_pdev = dss_get_core_pdev();
> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
>  	int cnt;
>  
>  	if (!board_data->get_context_loss_count)

Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Kevin Hilman]

Tomi Valkeinen <tomi.valkeinen@ti.com> writes:

> When using DT, dss device does not have platform data. However,
> dss_get_ctx_loss_count() uses dss device's platform data to find the
> get_ctx_loss_count function pointer.
>
> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
> platform data from the omapdss device, which is a "virtual" device and
> always has platform data.

Dumb question (since the DSS device model has always been beyond my
grasp): how/why does the virtual device still have platform_data on a DT
boot?

Also, this context_loss_count and DT boot is starting to get cumbersome,
and there's currently no (good) way of handling the context loss in a
generic way without pdata function pointers.

I'm starting to think we should move towards dropping this OMAP-specific
context loss counting, and just assume context is always lost.  If there
are performance problems, runtime PM autosuspend timeouts can be used to
avoid the transitions.

Or, on some devices, I suspect comparing a few registers against their
power-on reset values might be a quicker way of detecting lost context
and would avoid having to call into platform code all together.

Kevin

> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>  drivers/video/omap2/dss/dss.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
> index 94f66f9..bd01608 100644
> --- a/drivers/video/omap2/dss/dss.c
> +++ b/drivers/video/omap2/dss/dss.c
> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
>  
>  int dss_get_ctx_loss_count(void)
>  {
> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
> +	struct platform_device *core_pdev = dss_get_core_pdev();
> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
>  	int cnt;
>  
>  	if (!board_data->get_context_loss_count)

Re: [PATCH 03/32] OMAPDSS: add omap_dss_find_output()

[Tomi Valkeinen]

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On 30/05/13 18:40, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 14:40 Thu 30 May     , Tomi Valkeinen wrote:
>> On 30/05/13 14:07, Jean-Christophe PLAGNIOL-VILLARD wrote:
>>> On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
>>>> Add a support function to find a DSS output by given name. This is used
>>>> in later patches to link the panels to DSS outputs.
>>>>
>>>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>>>> ---
>>>>  drivers/video/omap2/dss/output.c | 13 +++++++++++++
>>>>  include/video/omapdss.h          |  1 +
>>>>  2 files changed, 14 insertions(+)
>>>>
>>>> diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
>>>> index 5214df6..3274628 100644
>>>> --- a/drivers/video/omap2/dss/output.c
>>>> +++ b/drivers/video/omap2/dss/output.c
>>>> @@ -115,6 +115,19 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
>>>>  }
>>>>  EXPORT_SYMBOL(omap_dss_get_output);
>>> GPL please
>>
>> The omapdss driver uses EXPORT_SYMBOL. I don't want to start mixing both
>> EXPORT_SYMBOLs and EXPORT_SYMBOL_GPLs.
> 
> I do not like EXPORT_SYMBOL at all
> I stringly prefer to switch all of them to _GPL
> 
> but will not refuse the patch for this in this case

I have nothing against changing omapdss to use _GPL only. I've never
heard anyone using non-GPL panel drivers with omap.

Following these patch sets I can remove lots of the old code, which
contains the majority of the EXPORT_SYMBOLs in omapdss. I'll change
omapdss to use _GPL after that removal.

>>>> +struct omap_dss_output *omap_dss_find_output(const char *name)
>>>> +{
>>>> +	struct omap_dss_output *out;
>>>> +
>>>> +	list_for_each_entry(out, &output_list, list) {
>>>> +		if (strcmp(out->name, name) == 0)
>>>> +			return out;
>>>> +	}
>>>> +
>>>> +	return NULL;
>>>> +}
>>> I this in so many drivers could we have a macro to generate such function?
>>
>> What would that help? Wouldn't it just increase the code size of the kernel?
> 
> increase no as it's not an inline function but a macro to generate the
> function
> after help yes but people may not like so as you wish

I don't think I understand what you mean then. What kind of macro are
you talking about?

 Tomi



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Re: [PATCH 03/32] OMAPDSS: add omap_dss_find_output()

[Tomi Valkeinen]

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On 30/05/13 18:40, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 14:40 Thu 30 May     , Tomi Valkeinen wrote:
>> On 30/05/13 14:07, Jean-Christophe PLAGNIOL-VILLARD wrote:
>>> On 12:34 Thu 30 May     , Tomi Valkeinen wrote:
>>>> Add a support function to find a DSS output by given name. This is used
>>>> in later patches to link the panels to DSS outputs.
>>>>
>>>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>>>> ---
>>>>  drivers/video/omap2/dss/output.c | 13 +++++++++++++
>>>>  include/video/omapdss.h          |  1 +
>>>>  2 files changed, 14 insertions(+)
>>>>
>>>> diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c
>>>> index 5214df6..3274628 100644
>>>> --- a/drivers/video/omap2/dss/output.c
>>>> +++ b/drivers/video/omap2/dss/output.c
>>>> @@ -115,6 +115,19 @@ struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
>>>>  }
>>>>  EXPORT_SYMBOL(omap_dss_get_output);
>>> GPL please
>>
>> The omapdss driver uses EXPORT_SYMBOL. I don't want to start mixing both
>> EXPORT_SYMBOLs and EXPORT_SYMBOL_GPLs.
> 
> I do not like EXPORT_SYMBOL at all
> I stringly prefer to switch all of them to _GPL
> 
> but will not refuse the patch for this in this case

I have nothing against changing omapdss to use _GPL only. I've never
heard anyone using non-GPL panel drivers with omap.

Following these patch sets I can remove lots of the old code, which
contains the majority of the EXPORT_SYMBOLs in omapdss. I'll change
omapdss to use _GPL after that removal.

>>>> +struct omap_dss_output *omap_dss_find_output(const char *name)
>>>> +{
>>>> +	struct omap_dss_output *out;
>>>> +
>>>> +	list_for_each_entry(out, &output_list, list) {
>>>> +		if (strcmp(out->name, name) == 0)
>>>> +			return out;
>>>> +	}
>>>> +
>>>> +	return NULL;
>>>> +}
>>> I this in so many drivers could we have a macro to generate such function?
>>
>> What would that help? Wouldn't it just increase the code size of the kernel?
> 
> increase no as it's not an inline function but a macro to generate the
> function
> after help yes but people may not like so as you wish

I don't think I understand what you mean then. What kind of macro are
you talking about?

 Tomi



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Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Tomi Valkeinen]

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On 30/05/13 19:36, Kevin Hilman wrote:
> Tomi Valkeinen <tomi.valkeinen@ti.com> writes:
> 
>> When using DT, dss device does not have platform data. However,
>> dss_get_ctx_loss_count() uses dss device's platform data to find the
>> get_ctx_loss_count function pointer.
>>
>> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
>> platform data from the omapdss device, which is a "virtual" device and
>> always has platform data.
> 
> Dumb question (since the DSS device model has always been beyond my
> grasp): how/why does the virtual device still have platform_data on a DT
> boot?

The virtual device will be created in generic omap arch code for DT boot
also.

The omapdss virtual device is an old relic. Originally we only had the
omapdss device, not the sub-devices for HW block like we have now. After
adding the sub-devices, omapdss device was still left, as it provided
useful functionality. It wasn't strictly needed anymore, but I've just
never had time to start refactoring code to remove it.

Now, with DT, it was just an easy way around to pass the func pointers.
Note that we also pass set_min_bus_tput, and a version identifier for
the DSS HW. The PM funcs could perhaps be handled some other way, but
I'm not sure how I could pass the DSS HW version.

> Also, this context_loss_count and DT boot is starting to get cumbersome,
> and there's currently no (good) way of handling the context loss in a
> generic way without pdata function pointers.
> 
> I'm starting to think we should move towards dropping this OMAP-specific
> context loss counting, and just assume context is always lost.  If there
> are performance problems, runtime PM autosuspend timeouts can be used to
> avoid the transitions.
> 
> Or, on some devices, I suspect comparing a few registers against their
> power-on reset values might be a quicker way of detecting lost context
> and would avoid having to call into platform code all together.

Hmm, true. I'll look at this. Maybe I won't need get_ctx_loss in omapdss
at all.

How about omap_pm_set_min_bus_tput(), can that be handled in some
generic manner? Although, we currently use that in a bit hacky case.
What we're doing is not really setting min bus tput, but we're just
preventing OPP50.

The DSS clocks have different maximums on OPP50 than on OPP100, and we
need to keep the core in OPP100 to keep DSS working. So what I'd rather
use is "prevent_opp50()" than setting arbitrarily high min bus tput.

 Tomi



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Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Tomi Valkeinen]

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On 30/05/13 19:36, Kevin Hilman wrote:
> Tomi Valkeinen <tomi.valkeinen@ti.com> writes:
> 
>> When using DT, dss device does not have platform data. However,
>> dss_get_ctx_loss_count() uses dss device's platform data to find the
>> get_ctx_loss_count function pointer.
>>
>> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
>> platform data from the omapdss device, which is a "virtual" device and
>> always has platform data.
> 
> Dumb question (since the DSS device model has always been beyond my
> grasp): how/why does the virtual device still have platform_data on a DT
> boot?

The virtual device will be created in generic omap arch code for DT boot
also.

The omapdss virtual device is an old relic. Originally we only had the
omapdss device, not the sub-devices for HW block like we have now. After
adding the sub-devices, omapdss device was still left, as it provided
useful functionality. It wasn't strictly needed anymore, but I've just
never had time to start refactoring code to remove it.

Now, with DT, it was just an easy way around to pass the func pointers.
Note that we also pass set_min_bus_tput, and a version identifier for
the DSS HW. The PM funcs could perhaps be handled some other way, but
I'm not sure how I could pass the DSS HW version.

> Also, this context_loss_count and DT boot is starting to get cumbersome,
> and there's currently no (good) way of handling the context loss in a
> generic way without pdata function pointers.
> 
> I'm starting to think we should move towards dropping this OMAP-specific
> context loss counting, and just assume context is always lost.  If there
> are performance problems, runtime PM autosuspend timeouts can be used to
> avoid the transitions.
> 
> Or, on some devices, I suspect comparing a few registers against their
> power-on reset values might be a quicker way of detecting lost context
> and would avoid having to call into platform code all together.

Hmm, true. I'll look at this. Maybe I won't need get_ctx_loss in omapdss
at all.

How about omap_pm_set_min_bus_tput(), can that be handled in some
generic manner? Although, we currently use that in a bit hacky case.
What we're doing is not really setting min bus tput, but we're just
preventing OPP50.

The DSS clocks have different maximums on OPP50 than on OPP100, and we
need to keep the core in OPP100 to keep DSS working. So what I'd rather
use is "prevent_opp50()" than setting arbitrarily high min bus tput.

 Tomi



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Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Grygorii Strashko]

On 05/30/2013 07:36 PM, Kevin Hilman wrote:
> Tomi Valkeinen <tomi.valkeinen@ti.com> writes:
>
>> When using DT, dss device does not have platform data. However,
>> dss_get_ctx_loss_count() uses dss device's platform data to find the
>> get_ctx_loss_count function pointer.
>>
>> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
>> platform data from the omapdss device, which is a "virtual" device and
>> always has platform data.
> Dumb question (since the DSS device model has always been beyond my
> grasp): how/why does the virtual device still have platform_data on a DT
> boot?
>
> Also, this context_loss_count and DT boot is starting to get cumbersome,
> and there's currently no (good) way of handling the context loss in a
> generic way without pdata function pointers.
>
> I'm starting to think we should move towards dropping this OMAP-specific
> context loss counting, and just assume context is always lost.  If there
> are performance problems, runtime PM autosuspend timeouts can be used to
> avoid the transitions.
>
> Or, on some devices, I suspect comparing a few registers against their
> power-on reset values might be a quicker way of detecting lost context
> and would avoid having to call into platform code all together.
Hi Kevin,
I've a question:
Why don't add API in "Kernel/Base PM" framework for context lost detection?
Like pm_was_ctx_lost().

If this topic has been discussed already (many times)) - sorry for the 
noise.
And I'll be very appreciate if you can point me on corresponding 
discussions.
>
> Kevin
>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> ---
>>   drivers/video/omap2/dss/dss.c | 3 ++-
>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
>> index 94f66f9..bd01608 100644
>> --- a/drivers/video/omap2/dss/dss.c
>> +++ b/drivers/video/omap2/dss/dss.c
>> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
>>   
>>   int dss_get_ctx_loss_count(void)
>>   {
>> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
>> +	struct platform_device *core_pdev = dss_get_core_pdev();
>> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
>>   	int cnt;
>>   
>>   	if (!board_data->get_context_loss_count)
> --
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Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Grygorii Strashko]

On 05/30/2013 07:36 PM, Kevin Hilman wrote:
> Tomi Valkeinen <tomi.valkeinen@ti.com> writes:
>
>> When using DT, dss device does not have platform data. However,
>> dss_get_ctx_loss_count() uses dss device's platform data to find the
>> get_ctx_loss_count function pointer.
>>
>> To fix this, dss_get_ctx_loss_count() needs to be changed to get the
>> platform data from the omapdss device, which is a "virtual" device and
>> always has platform data.
> Dumb question (since the DSS device model has always been beyond my
> grasp): how/why does the virtual device still have platform_data on a DT
> boot?
>
> Also, this context_loss_count and DT boot is starting to get cumbersome,
> and there's currently no (good) way of handling the context loss in a
> generic way without pdata function pointers.
>
> I'm starting to think we should move towards dropping this OMAP-specific
> context loss counting, and just assume context is always lost.  If there
> are performance problems, runtime PM autosuspend timeouts can be used to
> avoid the transitions.
>
> Or, on some devices, I suspect comparing a few registers against their
> power-on reset values might be a quicker way of detecting lost context
> and would avoid having to call into platform code all together.
Hi Kevin,
I've a question:
Why don't add API in "Kernel/Base PM" framework for context lost detection?
Like pm_was_ctx_lost().

If this topic has been discussed already (many times)) - sorry for the 
noise.
And I'll be very appreciate if you can point me on corresponding 
discussions.
>
> Kevin
>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> ---
>>   drivers/video/omap2/dss/dss.c | 3 ++-
>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
>> index 94f66f9..bd01608 100644
>> --- a/drivers/video/omap2/dss/dss.c
>> +++ b/drivers/video/omap2/dss/dss.c
>> @@ -157,7 +157,8 @@ static void dss_restore_context(void)
>>   
>>   int dss_get_ctx_loss_count(void)
>>   {
>> -	struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data;
>> +	struct platform_device *core_pdev = dss_get_core_pdev();
>> +	struct omap_dss_board_info *board_data = core_pdev->dev.platform_data;
>>   	int cnt;
>>   
>>   	if (!board_data->get_context_loss_count)
> --
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Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Kevin Hilman]

Hi Grygorii,

Grygorii Strashko <grygorii.strashko@ti.com> writes:

[...]

> I've a question:
> Why don't add API in "Kernel/Base PM" framework for context lost detection?
> Like pm_was_ctx_lost().

I'm not aware of any proposals to do this in a generic way.  Feel free
to propose one if you're so moved.

One complexity is that such a call is not needed on platforms that use
generic power domains (not OMAP). With gen_pd, the runtime PM callbacks
do not get called unless the power domains actually lose power.  So for
gen_pd, you assume context has been lost when your runtime PM callbacks
are called.

This is a bit different than how we've done it on OMAP, and there's been
some work in exploring how to adapt OMAP to gen_pd, but there's not
anyone actively working on it at the moment.

That being said, I'm still leaning towards simply removing the context
loss logic from all the OMAP drivers.  This feature adds a relatively
minor optimization, and a more configurable optimization could be done
using runtime PM autosuspend timeouts (configurable from userspace.)
Combined with the fact that adoption of gen_pd means we don't need it,
I'm included to drop it all together.

Kevin

Re: [PATCH 05/32] OMAPDSS: fix dss_get_ctx_loss_count for DT

[Kevin Hilman]

Hi Grygorii,

Grygorii Strashko <grygorii.strashko@ti.com> writes:

[...]

> I've a question:
> Why don't add API in "Kernel/Base PM" framework for context lost detection?
> Like pm_was_ctx_lost().

I'm not aware of any proposals to do this in a generic way.  Feel free
to propose one if you're so moved.

One complexity is that such a call is not needed on platforms that use
generic power domains (not OMAP). With gen_pd, the runtime PM callbacks
do not get called unless the power domains actually lose power.  So for
gen_pd, you assume context has been lost when your runtime PM callbacks
are called.

This is a bit different than how we've done it on OMAP, and there's been
some work in exploring how to adapt OMAP to gen_pd, but there's not
anyone actively working on it at the moment.

That being said, I'm still leaning towards simply removing the context
loss logic from all the OMAP drivers.  This feature adds a relatively
minor optimization, and a more configurable optimization could be done
using runtime PM autosuspend timeouts (configurable from userspace.)
Combined with the fact that adoption of gen_pd means we don't need it,
I'm included to drop it all together.

Kevin

Re: [PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> On some platforms DPI requires a regulator to be enabled to power up the
> output pins. This regulator is, for some reason, currently attached to
> the virtual omapdss device, instead of the DPI device. This does not
> work for DT, as the regulator mappings need to be described in the DT
> data, and the virtual omapdss device is not present there.
>
> Fix the issue by acquiring the regulator in the DPI device. To retain
> compatibility with the current board files, the old method of getting
> the regulator is kept. The old method can be removed when the board
> files have been changed to pass the regulator to DPI.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/video/omap2/dss/dpi.c | 21 ++++++++++++++++++---
>   1 file changed, 18 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
> index ef8fca2..43f6b26 100644
> --- a/drivers/video/omap2/dss/dpi.c
> +++ b/drivers/video/omap2/dss/dpi.c
> @@ -37,7 +37,10 @@
>   #include "dss_features.h"
>
>   static struct {
> +	struct platform_device *pdev;

We don't really need to add a new member here for getting the output's 
device pointer. It's already there in dpi.output.dev.

Archit

> +
>   	struct regulator *vdds_dsi_reg;
> +	bool vdds_dsi_from_core;
>   	struct platform_device *dsidev;
>
>   	struct mutex lock;
> @@ -583,10 +586,15 @@ static int dpi_init_display(struct omap_dss_device *dssdev)
>   		struct regulator *vdds_dsi;
>
>   		vdds_dsi = dss_get_vdds_dsi();
> -
>   		if (IS_ERR(vdds_dsi)) {
> -			DSSERR("can't get VDDS_DSI regulator\n");
> -			return PTR_ERR(vdds_dsi);
> +			vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
> +			if (IS_ERR(vdds_dsi)) {
> +				DSSERR("can't get VDDS_DSI regulator\n");
> +				return PTR_ERR(vdds_dsi);
> +			}
> +			dpi.vdds_dsi_from_core = false;
> +		} else {
> +			dpi.vdds_dsi_from_core = true;
>   		}
>
>   		dpi.vdds_dsi_reg = vdds_dsi;
> @@ -702,6 +710,8 @@ static int omap_dpi_probe(struct platform_device *pdev)
>   {
>   	int r;
>
> +	dpi.pdev = pdev;
> +
>   	mutex_init(&dpi.lock);
>
>   	dpi_init_output(pdev);
> @@ -725,6 +735,11 @@ static int __exit omap_dpi_remove(struct platform_device *pdev)
>
>   	dpi_uninit_output(pdev);
>
> +	if (dpi.vdds_dsi_reg != NULL && dpi.vdds_dsi_from_core == false) {
> +		regulator_put(dpi.vdds_dsi_reg);
> +		dpi.vdds_dsi_reg = NULL;
> +	}
> +
>   	return 0;
>   }
>
>

Re: [PATCH 06/32] OMAPDSS: DPI: fix regulators for DT

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> On some platforms DPI requires a regulator to be enabled to power up the
> output pins. This regulator is, for some reason, currently attached to
> the virtual omapdss device, instead of the DPI device. This does not
> work for DT, as the regulator mappings need to be described in the DT
> data, and the virtual omapdss device is not present there.
>
> Fix the issue by acquiring the regulator in the DPI device. To retain
> compatibility with the current board files, the old method of getting
> the regulator is kept. The old method can be removed when the board
> files have been changed to pass the regulator to DPI.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/video/omap2/dss/dpi.c | 21 ++++++++++++++++++---
>   1 file changed, 18 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
> index ef8fca2..43f6b26 100644
> --- a/drivers/video/omap2/dss/dpi.c
> +++ b/drivers/video/omap2/dss/dpi.c
> @@ -37,7 +37,10 @@
>   #include "dss_features.h"
>
>   static struct {
> +	struct platform_device *pdev;

We don't really need to add a new member here for getting the output's 
device pointer. It's already there in dpi.output.dev.

Archit

> +
>   	struct regulator *vdds_dsi_reg;
> +	bool vdds_dsi_from_core;
>   	struct platform_device *dsidev;
>
>   	struct mutex lock;
> @@ -583,10 +586,15 @@ static int dpi_init_display(struct omap_dss_device *dssdev)
>   		struct regulator *vdds_dsi;
>
>   		vdds_dsi = dss_get_vdds_dsi();
> -
>   		if (IS_ERR(vdds_dsi)) {
> -			DSSERR("can't get VDDS_DSI regulator\n");
> -			return PTR_ERR(vdds_dsi);
> +			vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
> +			if (IS_ERR(vdds_dsi)) {
> +				DSSERR("can't get VDDS_DSI regulator\n");
> +				return PTR_ERR(vdds_dsi);
> +			}
> +			dpi.vdds_dsi_from_core = false;
> +		} else {
> +			dpi.vdds_dsi_from_core = true;
>   		}
>
>   		dpi.vdds_dsi_reg = vdds_dsi;
> @@ -702,6 +710,8 @@ static int omap_dpi_probe(struct platform_device *pdev)
>   {
>   	int r;
>
> +	dpi.pdev = pdev;
> +
>   	mutex_init(&dpi.lock);
>
>   	dpi_init_output(pdev);
> @@ -725,6 +735,11 @@ static int __exit omap_dpi_remove(struct platform_device *pdev)
>
>   	dpi_uninit_output(pdev);
>
> +	if (dpi.vdds_dsi_reg != NULL && dpi.vdds_dsi_from_core = false) {
> +		regulator_put(dpi.vdds_dsi_reg);
> +		dpi.vdds_dsi_reg = NULL;
> +	}
> +
>   	return 0;
>   }
>
>

Re: [PATCH 10/32] OMAPDSS: split overlay manager creation

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> Split the function that creates overlay manager structs into two: one
> that creates just the structs, and one that creates the sysfs files for
> the manager.
>
> This will help us use the overlay manager structs with omapdrm in the
> following patches, while still leaving the sysfs files out.

Maybe the omapdss Makefile should also reflect this change, we could 
move manager.o so that it doesn't look like a compat file any more.

Archit

>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/video/omap2/dss/apply.c         |  9 ++++++---
>   drivers/video/omap2/dss/dss.h           |  6 ++++--
>   drivers/video/omap2/dss/manager-sysfs.c |  2 ++
>   drivers/video/omap2/dss/manager.c       | 29 ++++++++++++++++++++++-------
>   4 files changed, 34 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
> index b84bd99..74d1d00 100644
> --- a/drivers/video/omap2/dss/apply.c
> +++ b/drivers/video/omap2/dss/apply.c
> @@ -1577,7 +1577,8 @@ int omapdss_compat_init(void)
>
>   	apply_init_priv();
>
> -	dss_init_overlay_managers(pdev);
> +	dss_init_overlay_managers();
> +	dss_init_overlay_managers_sysfs(pdev);
>   	dss_init_overlays(pdev);
>
>   	for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) {
> @@ -1640,7 +1641,8 @@ err_disp_sysfs:
>   	dss_uninstall_mgr_ops();
>
>   err_mgr_ops:
> -	dss_uninit_overlay_managers(pdev);
> +	dss_uninit_overlay_managers_sysfs(pdev);
> +	dss_uninit_overlay_managers();
>   	dss_uninit_overlays(pdev);
>
>   	compat_refcnt--;
> @@ -1668,7 +1670,8 @@ void omapdss_compat_uninit(void)
>
>   	dss_uninstall_mgr_ops();
>
> -	dss_uninit_overlay_managers(pdev);
> +	dss_uninit_overlay_managers_sysfs(pdev);
> +	dss_uninit_overlay_managers();
>   	dss_uninit_overlays(pdev);
>   out:
>   	mutex_unlock(&compat_init_lock);
> diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
> index 8475893..7964d3b 100644
> --- a/drivers/video/omap2/dss/dss.h
> +++ b/drivers/video/omap2/dss/dss.h
> @@ -194,8 +194,10 @@ void display_uninit_sysfs(struct platform_device *pdev,
>   		struct omap_dss_device *dssdev);
>
>   /* manager */
> -int dss_init_overlay_managers(struct platform_device *pdev);
> -void dss_uninit_overlay_managers(struct platform_device *pdev);
> +int dss_init_overlay_managers(void);
> +void dss_uninit_overlay_managers(void);
> +int dss_init_overlay_managers_sysfs(struct platform_device *pdev);
> +void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev);
>   int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
>   		const struct omap_overlay_manager_info *info);
>   int dss_mgr_check_timings(struct omap_overlay_manager *mgr,
> diff --git a/drivers/video/omap2/dss/manager-sysfs.c b/drivers/video/omap2/dss/manager-sysfs.c
> index 5104681..72784b3 100644
> --- a/drivers/video/omap2/dss/manager-sysfs.c
> +++ b/drivers/video/omap2/dss/manager-sysfs.c
> @@ -511,4 +511,6 @@ void dss_manager_kobj_uninit(struct omap_overlay_manager *mgr)
>   {
>   	kobject_del(&mgr->kobj);
>   	kobject_put(&mgr->kobj);
> +
> +	memset(&mgr->kobj, 0, sizeof(mgr->kobj));
>   }
> diff --git a/drivers/video/omap2/dss/manager.c b/drivers/video/omap2/dss/manager.c
> index 2551eaa..1aac9b4 100644
> --- a/drivers/video/omap2/dss/manager.c
> +++ b/drivers/video/omap2/dss/manager.c
> @@ -36,9 +36,9 @@
>   static int num_managers;
>   static struct omap_overlay_manager *managers;
>
> -int dss_init_overlay_managers(struct platform_device *pdev)
> +int dss_init_overlay_managers(void)
>   {
> -	int i, r;
> +	int i;
>
>   	num_managers = dss_feat_get_num_mgrs();
>
> @@ -76,6 +76,17 @@ int dss_init_overlay_managers(struct platform_device *pdev)
>   			dss_feat_get_supported_outputs(mgr->id);
>
>   		INIT_LIST_HEAD(&mgr->overlays);
> +	}
> +
> +	return 0;
> +}
> +
> +int dss_init_overlay_managers_sysfs(struct platform_device *pdev)
> +{
> +	int i, r;
> +
> +	for (i = 0; i < num_managers; ++i) {
> +		struct omap_overlay_manager *mgr = &managers[i];
>
>   		r = dss_manager_kobj_init(mgr, pdev);
>   		if (r)
> @@ -85,18 +96,22 @@ int dss_init_overlay_managers(struct platform_device *pdev)
>   	return 0;
>   }
>
> -void dss_uninit_overlay_managers(struct platform_device *pdev)
> +void dss_uninit_overlay_managers(void)
> +{
> +	kfree(managers);
> +	managers = NULL;
> +	num_managers = 0;
> +}
> +
> +void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev)
>   {
>   	int i;
>
>   	for (i = 0; i < num_managers; ++i) {
>   		struct omap_overlay_manager *mgr = &managers[i];
> +
>   		dss_manager_kobj_uninit(mgr);
>   	}
> -
> -	kfree(managers);
> -	managers = NULL;
> -	num_managers = 0;
>   }
>
>   int omap_dss_get_num_overlay_managers(void)
>

Re: [PATCH 11/32] OMAPDRM: fix overlay manager handling

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> Currently omapdrm creates crtcs, which map directly to DSS overlay
> managers, only on demand at init time. This would make it difficult to
> manage connecting the display entities in the future, as the code cannot
> just search for a suitable overlay manager.
>
> We cannot fix this the sane way, which would be to create crtcs for each
> overlay manager, because we need an overlay for each crtc. With limited
> number of overlays, that's not possible.
>
> So the solution for now is to detach the overlay manager from the crtc.
> crtcs are still created on demand at init time, but all overlay managers
> are always initialized by the omapdss.
>
> This way we can create and connect whole display pipelines from the
> overlay manager to the display, regardless of which crtcs omapdrm would
> create.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/gpu/drm/omapdrm/omap_crtc.c | 22 +++++++++++++++-------
>   drivers/gpu/drm/omapdrm/omap_drv.c  |  2 ++
>   drivers/gpu/drm/omapdrm/omap_drv.h  |  1 +
>   drivers/video/omap2/dss/apply.c     |  3 ---
>   drivers/video/omap2/dss/dispc.c     |  4 ++++
>   5 files changed, 22 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
> index 79b200a..02075bf 100644
> --- a/drivers/gpu/drm/omapdrm/omap_crtc.c
> +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
> @@ -40,7 +40,7 @@ struct omap_crtc {
>   	 * mgr->id.)  Eventually this will be replaced w/ something
>   	 * more common-panel-framework-y
>   	 */
> -	struct omap_overlay_manager mgr;
> +	struct omap_overlay_manager *mgr;
>
>   	struct omap_video_timings timings;
>   	bool enabled;
> @@ -90,6 +90,9 @@ uint32_t pipe2vbl(struct drm_crtc *crtc)
>    * job of sequencing the setup of the video pipe in the proper order
>    */
>
> +/* ovl-mgr-id -> crtc */
> +static struct omap_crtc *omap_crtcs[8];
> +
>   /* we can probably ignore these until we support command-mode panels: */
>   static void omap_crtc_start_update(struct omap_overlay_manager *mgr)
>   {
> @@ -107,7 +110,7 @@ static void omap_crtc_disable(struct omap_overlay_manager *mgr)
>   static void omap_crtc_set_timings(struct omap_overlay_manager *mgr,
>   		const struct omap_video_timings *timings)
>   {
> -	struct omap_crtc *omap_crtc = container_of(mgr, struct omap_crtc, mgr);
> +	struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
>   	DBG("%s", omap_crtc->name);
>   	omap_crtc->timings = *timings;
>   	omap_crtc->full_update = true;
> @@ -116,7 +119,7 @@ static void omap_crtc_set_timings(struct omap_overlay_manager *mgr,
>   static void omap_crtc_set_lcd_config(struct omap_overlay_manager *mgr,
>   		const struct dss_lcd_mgr_config *config)
>   {
> -	struct omap_crtc *omap_crtc = container_of(mgr, struct omap_crtc, mgr);
> +	struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
>   	DBG("%s", omap_crtc->name);
>   	dispc_mgr_set_lcd_config(omap_crtc->channel, config);
>   }
> @@ -569,7 +572,7 @@ static void omap_crtc_pre_apply(struct omap_drm_apply *apply)
>   	} else {
>   		if (encoder) {
>   			omap_encoder_set_enabled(encoder, false);
> -			omap_encoder_update(encoder, &omap_crtc->mgr,
> +			omap_encoder_update(encoder, omap_crtc->mgr,
>   					&omap_crtc->timings);
>   			omap_encoder_set_enabled(encoder, true);
>   			omap_crtc->full_update = false;
> @@ -595,6 +598,11 @@ static const char *channel_names[] = {
>   		[OMAP_DSS_CHANNEL_LCD2] = "lcd2",
>   };

Since we are creating overlay managers structs now, we could get rid of 
the channel_names strings above and use mgr->name instead. Not 
necessary, of course.

Archit

>
> +void omap_crtc_pre_init(void)
> +{
> +	dss_install_mgr_ops(&mgr_ops);
> +}
> +
>   /* initialize crtc */
>   struct drm_crtc *omap_crtc_init(struct drm_device *dev,
>   		struct drm_plane *plane, enum omap_channel channel, int id)
> @@ -635,9 +643,7 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev,
>   	omap_irq_register(dev, &omap_crtc->error_irq);
>
>   	/* temporary: */
> -	omap_crtc->mgr.id = channel;
> -
> -	dss_install_mgr_ops(&mgr_ops);
> +	omap_crtc->mgr = omap_dss_get_overlay_manager(channel);
>
>   	/* TODO: fix hard-coded setup.. add properties! */
>   	info = &omap_crtc->info;
> @@ -651,6 +657,8 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev,
>
>   	omap_plane_install_properties(omap_crtc->plane, &crtc->base);
>
> +	omap_crtcs[channel] = omap_crtc;
> +
>   	return crtc;
>
>   fail:
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
> index 691e760..f8947f9 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.c
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.c
> @@ -98,6 +98,8 @@ static int omap_modeset_init(struct drm_device *dev)
>   	int num_crtcs;
>   	int i, id = 0;
>
> +	omap_crtc_pre_init();
> +
>   	drm_mode_config_init(dev);
>
>   	omap_drm_irq_install(dev);
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h b/drivers/gpu/drm/omapdrm/omap_drv.h
> index 215a20d..14f17da 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.h
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.h
> @@ -157,6 +157,7 @@ const struct omap_video_timings *omap_crtc_timings(struct drm_crtc *crtc);
>   enum omap_channel omap_crtc_channel(struct drm_crtc *crtc);
>   int omap_crtc_apply(struct drm_crtc *crtc,
>   		struct omap_drm_apply *apply);
> +void omap_crtc_pre_init(void);
>   struct drm_crtc *omap_crtc_init(struct drm_device *dev,
>   		struct drm_plane *plane, enum omap_channel channel, int id);
>
> diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
> index 74d1d00..c844071 100644
> --- a/drivers/video/omap2/dss/apply.c
> +++ b/drivers/video/omap2/dss/apply.c
> @@ -1577,7 +1577,6 @@ int omapdss_compat_init(void)
>
>   	apply_init_priv();
>
> -	dss_init_overlay_managers();
>   	dss_init_overlay_managers_sysfs(pdev);
>   	dss_init_overlays(pdev);
>
> @@ -1642,7 +1641,6 @@ err_disp_sysfs:
>
>   err_mgr_ops:
>   	dss_uninit_overlay_managers_sysfs(pdev);
> -	dss_uninit_overlay_managers();
>   	dss_uninit_overlays(pdev);
>
>   	compat_refcnt--;
> @@ -1671,7 +1669,6 @@ void omapdss_compat_uninit(void)
>   	dss_uninstall_mgr_ops();
>
>   	dss_uninit_overlay_managers_sysfs(pdev);
> -	dss_uninit_overlay_managers();
>   	dss_uninit_overlays(pdev);
>   out:
>   	mutex_unlock(&compat_init_lock);
> diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
> index b33b016..83d7bb9 100644
> --- a/drivers/video/omap2/dss/dispc.c
> +++ b/drivers/video/omap2/dss/dispc.c
> @@ -3710,6 +3710,8 @@ static int __init omap_dispchw_probe(struct platform_device *pdev)
>
>   	dispc_runtime_put();
>
> +	dss_init_overlay_managers();
> +
>   	dss_debugfs_create_file("dispc", dispc_dump_regs);
>
>   	return 0;
> @@ -3723,6 +3725,8 @@ static int __exit omap_dispchw_remove(struct platform_device *pdev)
>   {
>   	pm_runtime_disable(&pdev->dev);
>
> +	dss_uninit_overlay_managers();
> +
>   	return 0;
>   }
>
>

Re: [PATCH 10/32] OMAPDSS: split overlay manager creation

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> Split the function that creates overlay manager structs into two: one
> that creates just the structs, and one that creates the sysfs files for
> the manager.
>
> This will help us use the overlay manager structs with omapdrm in the
> following patches, while still leaving the sysfs files out.

Maybe the omapdss Makefile should also reflect this change, we could 
move manager.o so that it doesn't look like a compat file any more.

Archit

>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/video/omap2/dss/apply.c         |  9 ++++++---
>   drivers/video/omap2/dss/dss.h           |  6 ++++--
>   drivers/video/omap2/dss/manager-sysfs.c |  2 ++
>   drivers/video/omap2/dss/manager.c       | 29 ++++++++++++++++++++++-------
>   4 files changed, 34 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
> index b84bd99..74d1d00 100644
> --- a/drivers/video/omap2/dss/apply.c
> +++ b/drivers/video/omap2/dss/apply.c
> @@ -1577,7 +1577,8 @@ int omapdss_compat_init(void)
>
>   	apply_init_priv();
>
> -	dss_init_overlay_managers(pdev);
> +	dss_init_overlay_managers();
> +	dss_init_overlay_managers_sysfs(pdev);
>   	dss_init_overlays(pdev);
>
>   	for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) {
> @@ -1640,7 +1641,8 @@ err_disp_sysfs:
>   	dss_uninstall_mgr_ops();
>
>   err_mgr_ops:
> -	dss_uninit_overlay_managers(pdev);
> +	dss_uninit_overlay_managers_sysfs(pdev);
> +	dss_uninit_overlay_managers();
>   	dss_uninit_overlays(pdev);
>
>   	compat_refcnt--;
> @@ -1668,7 +1670,8 @@ void omapdss_compat_uninit(void)
>
>   	dss_uninstall_mgr_ops();
>
> -	dss_uninit_overlay_managers(pdev);
> +	dss_uninit_overlay_managers_sysfs(pdev);
> +	dss_uninit_overlay_managers();
>   	dss_uninit_overlays(pdev);
>   out:
>   	mutex_unlock(&compat_init_lock);
> diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
> index 8475893..7964d3b 100644
> --- a/drivers/video/omap2/dss/dss.h
> +++ b/drivers/video/omap2/dss/dss.h
> @@ -194,8 +194,10 @@ void display_uninit_sysfs(struct platform_device *pdev,
>   		struct omap_dss_device *dssdev);
>
>   /* manager */
> -int dss_init_overlay_managers(struct platform_device *pdev);
> -void dss_uninit_overlay_managers(struct platform_device *pdev);
> +int dss_init_overlay_managers(void);
> +void dss_uninit_overlay_managers(void);
> +int dss_init_overlay_managers_sysfs(struct platform_device *pdev);
> +void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev);
>   int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
>   		const struct omap_overlay_manager_info *info);
>   int dss_mgr_check_timings(struct omap_overlay_manager *mgr,
> diff --git a/drivers/video/omap2/dss/manager-sysfs.c b/drivers/video/omap2/dss/manager-sysfs.c
> index 5104681..72784b3 100644
> --- a/drivers/video/omap2/dss/manager-sysfs.c
> +++ b/drivers/video/omap2/dss/manager-sysfs.c
> @@ -511,4 +511,6 @@ void dss_manager_kobj_uninit(struct omap_overlay_manager *mgr)
>   {
>   	kobject_del(&mgr->kobj);
>   	kobject_put(&mgr->kobj);
> +
> +	memset(&mgr->kobj, 0, sizeof(mgr->kobj));
>   }
> diff --git a/drivers/video/omap2/dss/manager.c b/drivers/video/omap2/dss/manager.c
> index 2551eaa..1aac9b4 100644
> --- a/drivers/video/omap2/dss/manager.c
> +++ b/drivers/video/omap2/dss/manager.c
> @@ -36,9 +36,9 @@
>   static int num_managers;
>   static struct omap_overlay_manager *managers;
>
> -int dss_init_overlay_managers(struct platform_device *pdev)
> +int dss_init_overlay_managers(void)
>   {
> -	int i, r;
> +	int i;
>
>   	num_managers = dss_feat_get_num_mgrs();
>
> @@ -76,6 +76,17 @@ int dss_init_overlay_managers(struct platform_device *pdev)
>   			dss_feat_get_supported_outputs(mgr->id);
>
>   		INIT_LIST_HEAD(&mgr->overlays);
> +	}
> +
> +	return 0;
> +}
> +
> +int dss_init_overlay_managers_sysfs(struct platform_device *pdev)
> +{
> +	int i, r;
> +
> +	for (i = 0; i < num_managers; ++i) {
> +		struct omap_overlay_manager *mgr = &managers[i];
>
>   		r = dss_manager_kobj_init(mgr, pdev);
>   		if (r)
> @@ -85,18 +96,22 @@ int dss_init_overlay_managers(struct platform_device *pdev)
>   	return 0;
>   }
>
> -void dss_uninit_overlay_managers(struct platform_device *pdev)
> +void dss_uninit_overlay_managers(void)
> +{
> +	kfree(managers);
> +	managers = NULL;
> +	num_managers = 0;
> +}
> +
> +void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev)
>   {
>   	int i;
>
>   	for (i = 0; i < num_managers; ++i) {
>   		struct omap_overlay_manager *mgr = &managers[i];
> +
>   		dss_manager_kobj_uninit(mgr);
>   	}
> -
> -	kfree(managers);
> -	managers = NULL;
> -	num_managers = 0;
>   }
>
>   int omap_dss_get_num_overlay_managers(void)
>

Re: [PATCH 11/32] OMAPDRM: fix overlay manager handling

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> Currently omapdrm creates crtcs, which map directly to DSS overlay
> managers, only on demand at init time. This would make it difficult to
> manage connecting the display entities in the future, as the code cannot
> just search for a suitable overlay manager.
>
> We cannot fix this the sane way, which would be to create crtcs for each
> overlay manager, because we need an overlay for each crtc. With limited
> number of overlays, that's not possible.
>
> So the solution for now is to detach the overlay manager from the crtc.
> crtcs are still created on demand at init time, but all overlay managers
> are always initialized by the omapdss.
>
> This way we can create and connect whole display pipelines from the
> overlay manager to the display, regardless of which crtcs omapdrm would
> create.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/gpu/drm/omapdrm/omap_crtc.c | 22 +++++++++++++++-------
>   drivers/gpu/drm/omapdrm/omap_drv.c  |  2 ++
>   drivers/gpu/drm/omapdrm/omap_drv.h  |  1 +
>   drivers/video/omap2/dss/apply.c     |  3 ---
>   drivers/video/omap2/dss/dispc.c     |  4 ++++
>   5 files changed, 22 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
> index 79b200a..02075bf 100644
> --- a/drivers/gpu/drm/omapdrm/omap_crtc.c
> +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
> @@ -40,7 +40,7 @@ struct omap_crtc {
>   	 * mgr->id.)  Eventually this will be replaced w/ something
>   	 * more common-panel-framework-y
>   	 */
> -	struct omap_overlay_manager mgr;
> +	struct omap_overlay_manager *mgr;
>
>   	struct omap_video_timings timings;
>   	bool enabled;
> @@ -90,6 +90,9 @@ uint32_t pipe2vbl(struct drm_crtc *crtc)
>    * job of sequencing the setup of the video pipe in the proper order
>    */
>
> +/* ovl-mgr-id -> crtc */
> +static struct omap_crtc *omap_crtcs[8];
> +
>   /* we can probably ignore these until we support command-mode panels: */
>   static void omap_crtc_start_update(struct omap_overlay_manager *mgr)
>   {
> @@ -107,7 +110,7 @@ static void omap_crtc_disable(struct omap_overlay_manager *mgr)
>   static void omap_crtc_set_timings(struct omap_overlay_manager *mgr,
>   		const struct omap_video_timings *timings)
>   {
> -	struct omap_crtc *omap_crtc = container_of(mgr, struct omap_crtc, mgr);
> +	struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
>   	DBG("%s", omap_crtc->name);
>   	omap_crtc->timings = *timings;
>   	omap_crtc->full_update = true;
> @@ -116,7 +119,7 @@ static void omap_crtc_set_timings(struct omap_overlay_manager *mgr,
>   static void omap_crtc_set_lcd_config(struct omap_overlay_manager *mgr,
>   		const struct dss_lcd_mgr_config *config)
>   {
> -	struct omap_crtc *omap_crtc = container_of(mgr, struct omap_crtc, mgr);
> +	struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
>   	DBG("%s", omap_crtc->name);
>   	dispc_mgr_set_lcd_config(omap_crtc->channel, config);
>   }
> @@ -569,7 +572,7 @@ static void omap_crtc_pre_apply(struct omap_drm_apply *apply)
>   	} else {
>   		if (encoder) {
>   			omap_encoder_set_enabled(encoder, false);
> -			omap_encoder_update(encoder, &omap_crtc->mgr,
> +			omap_encoder_update(encoder, omap_crtc->mgr,
>   					&omap_crtc->timings);
>   			omap_encoder_set_enabled(encoder, true);
>   			omap_crtc->full_update = false;
> @@ -595,6 +598,11 @@ static const char *channel_names[] = {
>   		[OMAP_DSS_CHANNEL_LCD2] = "lcd2",
>   };

Since we are creating overlay managers structs now, we could get rid of 
the channel_names strings above and use mgr->name instead. Not 
necessary, of course.

Archit

>
> +void omap_crtc_pre_init(void)
> +{
> +	dss_install_mgr_ops(&mgr_ops);
> +}
> +
>   /* initialize crtc */
>   struct drm_crtc *omap_crtc_init(struct drm_device *dev,
>   		struct drm_plane *plane, enum omap_channel channel, int id)
> @@ -635,9 +643,7 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev,
>   	omap_irq_register(dev, &omap_crtc->error_irq);
>
>   	/* temporary: */
> -	omap_crtc->mgr.id = channel;
> -
> -	dss_install_mgr_ops(&mgr_ops);
> +	omap_crtc->mgr = omap_dss_get_overlay_manager(channel);
>
>   	/* TODO: fix hard-coded setup.. add properties! */
>   	info = &omap_crtc->info;
> @@ -651,6 +657,8 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev,
>
>   	omap_plane_install_properties(omap_crtc->plane, &crtc->base);
>
> +	omap_crtcs[channel] = omap_crtc;
> +
>   	return crtc;
>
>   fail:
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
> index 691e760..f8947f9 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.c
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.c
> @@ -98,6 +98,8 @@ static int omap_modeset_init(struct drm_device *dev)
>   	int num_crtcs;
>   	int i, id = 0;
>
> +	omap_crtc_pre_init();
> +
>   	drm_mode_config_init(dev);
>
>   	omap_drm_irq_install(dev);
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h b/drivers/gpu/drm/omapdrm/omap_drv.h
> index 215a20d..14f17da 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.h
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.h
> @@ -157,6 +157,7 @@ const struct omap_video_timings *omap_crtc_timings(struct drm_crtc *crtc);
>   enum omap_channel omap_crtc_channel(struct drm_crtc *crtc);
>   int omap_crtc_apply(struct drm_crtc *crtc,
>   		struct omap_drm_apply *apply);
> +void omap_crtc_pre_init(void);
>   struct drm_crtc *omap_crtc_init(struct drm_device *dev,
>   		struct drm_plane *plane, enum omap_channel channel, int id);
>
> diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
> index 74d1d00..c844071 100644
> --- a/drivers/video/omap2/dss/apply.c
> +++ b/drivers/video/omap2/dss/apply.c
> @@ -1577,7 +1577,6 @@ int omapdss_compat_init(void)
>
>   	apply_init_priv();
>
> -	dss_init_overlay_managers();
>   	dss_init_overlay_managers_sysfs(pdev);
>   	dss_init_overlays(pdev);
>
> @@ -1642,7 +1641,6 @@ err_disp_sysfs:
>
>   err_mgr_ops:
>   	dss_uninit_overlay_managers_sysfs(pdev);
> -	dss_uninit_overlay_managers();
>   	dss_uninit_overlays(pdev);
>
>   	compat_refcnt--;
> @@ -1671,7 +1669,6 @@ void omapdss_compat_uninit(void)
>   	dss_uninstall_mgr_ops();
>
>   	dss_uninit_overlay_managers_sysfs(pdev);
> -	dss_uninit_overlay_managers();
>   	dss_uninit_overlays(pdev);
>   out:
>   	mutex_unlock(&compat_init_lock);
> diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
> index b33b016..83d7bb9 100644
> --- a/drivers/video/omap2/dss/dispc.c
> +++ b/drivers/video/omap2/dss/dispc.c
> @@ -3710,6 +3710,8 @@ static int __init omap_dispchw_probe(struct platform_device *pdev)
>
>   	dispc_runtime_put();
>
> +	dss_init_overlay_managers();
> +
>   	dss_debugfs_create_file("dispc", dispc_dump_regs);
>
>   	return 0;
> @@ -3723,6 +3725,8 @@ static int __exit omap_dispchw_remove(struct platform_device *pdev)
>   {
>   	pm_runtime_disable(&pdev->dev);
>
> +	dss_uninit_overlay_managers();
> +
>   	return 0;
>   }
>
>

Re: [PATCH 12/32] OMAPDSS: Implement display (dis)connect support

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> We currently have two steps in panel initialization and startup: probing
> and enabling. After the panel has been probed, it's ready and can be
> configured and later enabled.
>
> This model is not enough with more complex display pipelines, where we
> may have, for example, two panels, of which only one can be used at a
> time, connected to the same video output.
>
> To support that kind of scenarios, we need to add new step to the
> initialization: connect.
>
> This patch adds support for connecting and disconnecting panels. After
> probe, but before connect, no panel ops should be called. When the
> connect is called, a proper video pipeline is established, and the panel
> is ready for use. If some part in the video pipeline is already
> connected (by some other panel), the connect call fails.
>
> One key difference with the old style setup is that connect() handles
> also connecting to the overlay manager. This means that the omapfb (or
> omapdrm) no longer needs to figure out which overlay manager to use, but
> it can just call connect() on the panel, and the proper overlay manager
> is connected by omapdss.
>
> This also allows us to add back the support for dynamic switching
> between two exclusive panels. However, the current panel device model is
> not changed to support this, as the new device model is implemented in
> the following patches and the old model will be removed. The new device
> model supports dynamic switching.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/gpu/drm/omapdrm/omap_crtc.c      | 24 +++++++++++++++++
>   drivers/gpu/drm/omapdrm/omap_drv.c       | 12 ++++++++-
>   drivers/video/omap2/dss/apply.c          | 14 ++++++++++
>   drivers/video/omap2/dss/core.c           | 44 +++++++++++++++++++++++++++++++
>   drivers/video/omap2/dss/display-sysfs.c  | 28 +++++++++++---------
>   drivers/video/omap2/dss/manager-sysfs.c  | 45 ++++++++++++++++++++------------
>   drivers/video/omap2/dss/output.c         | 14 ++++++++++
>   drivers/video/omap2/omapfb/omapfb-main.c | 25 ++++++++++--------
>   include/video/omapdss.h                  | 23 ++++++++++++++++
>   9 files changed, 188 insertions(+), 41 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
> index 02075bf..b2ab2f5 100644
> --- a/drivers/gpu/drm/omapdrm/omap_crtc.c
> +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
> @@ -94,6 +94,28 @@ uint32_t pipe2vbl(struct drm_crtc *crtc)
>   static struct omap_crtc *omap_crtcs[8];
>
>   /* we can probably ignore these until we support command-mode panels: */
> +static int omap_crtc_connect(struct omap_overlay_manager *mgr,
> +		struct omap_dss_output *dst)
> +{
> +	if (mgr->output)
> +		return -EINVAL;
> +
> +	if ((mgr->supported_outputs & dst->id) == 0)
> +		return -EINVAL;
> +
> +	dst->manager = mgr;
> +	mgr->output = dst;
> +
> +	return 0;
> +}
> +
> +static void omap_crtc_disconnect(struct omap_overlay_manager *mgr,
> +		struct omap_dss_output *dst)
> +{
> +	mgr->output->manager = NULL;
> +	mgr->output = NULL;
> +}
> +
>   static void omap_crtc_start_update(struct omap_overlay_manager *mgr)
>   {
>   }
> @@ -138,6 +160,8 @@ static void omap_crtc_unregister_framedone_handler(
>   }
>
>   static const struct dss_mgr_ops mgr_ops = {
> +		.connect = omap_crtc_connect,
> +		.disconnect = omap_crtc_disconnect,
>   		.start_update = omap_crtc_start_update,
>   		.enable = omap_crtc_enable,
>   		.disable = omap_crtc_disable,
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
> index f8947f9..58bd259 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.c
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.c
> @@ -97,6 +97,7 @@ static int omap_modeset_init(struct drm_device *dev)
>   	int num_mgrs = dss_feat_get_num_mgrs();
>   	int num_crtcs;
>   	int i, id = 0;
> +	int r;
>
>   	omap_crtc_pre_init();
>
> @@ -118,6 +119,7 @@ static int omap_modeset_init(struct drm_device *dev)
>   		struct drm_connector *connector;
>   		struct drm_encoder *encoder;
>   		enum omap_channel channel;
> +		struct omap_overlay_manager *mgr;
>
>   		if (!dssdev->driver) {
>   			dev_warn(dev->dev, "%s has no driver.. skipping it\n",
> @@ -133,6 +135,13 @@ static int omap_modeset_init(struct drm_device *dev)
>   			continue;
>   		}
>
> +		r = dssdev->driver->connect(dssdev);
> +		if (r) {
> +			dev_err(dev->dev, "could not connect display: %s\n",
> +					dssdev->name);
> +			continue;
> +		}
> +
>   		encoder = omap_encoder_init(dev, dssdev);
>
>   		if (!encoder) {
> @@ -174,8 +183,9 @@ static int omap_modeset_init(struct drm_device *dev)
>   		 * other possible channels to which the encoder can connect are
>   		 * not considered.
>   		 */
> -		channel = dssdev->output->dispc_channel;
>
> +		mgr = omapdss_find_mgr_from_display(dssdev);
> +		channel = mgr->id;
>   		/*
>   		 * if this channel hasn't already been taken by a previously
>   		 * allocated crtc, we create a new crtc for it
> diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
> index c844071..dbd3c2f 100644
> --- a/drivers/video/omap2/dss/apply.c
> +++ b/drivers/video/omap2/dss/apply.c
> @@ -790,6 +790,18 @@ static void mgr_clear_shadow_dirty(struct omap_overlay_manager *mgr)
>   	}
>   }
>
> +static int dss_mgr_connect_compat(struct omap_overlay_manager *mgr,
> +		struct omap_dss_output *dst)
> +{
> +	return mgr->set_output(mgr, dst);
> +}
> +
> +static void dss_mgr_disconnect_compat(struct omap_overlay_manager *mgr,
> +		struct omap_dss_output *dst)
> +{
> +	mgr->unset_output(mgr);
> +}
> +
>   static void dss_mgr_start_update_compat(struct omap_overlay_manager *mgr)
>   {
>   	struct mgr_priv_data *mp = get_mgr_priv(mgr);
> @@ -1552,6 +1564,8 @@ static void dss_mgr_unregister_framedone_handler_compat(struct omap_overlay_mana
>   }
>
>   static const struct dss_mgr_ops apply_mgr_ops = {
> +	.connect = dss_mgr_connect_compat,
> +	.disconnect = dss_mgr_disconnect_compat,
>   	.start_update = dss_mgr_start_update_compat,
>   	.enable = dss_mgr_enable_compat,
>   	.disable = dss_mgr_disable_compat,
> diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
> index 502ec1b..4bd8f79 100644
> --- a/drivers/video/omap2/dss/core.c
> +++ b/drivers/video/omap2/dss/core.c
> @@ -371,6 +371,46 @@ static int dss_driver_remove(struct device *dev)
>   	return 0;
>   }
>
> +static int omapdss_default_connect(struct omap_dss_device *dssdev)
> +{
> +	struct omap_dss_output *out;
> +	struct omap_overlay_manager *mgr;
> +	int r;
> +
> +	out = dssdev->output;
> +
> +	if (out == NULL)
> +		return -ENODEV;
> +
> +	mgr = omap_dss_get_overlay_manager(out->dispc_channel);
> +	if (!mgr)
> +		return -ENODEV;
> +
> +	r = dss_mgr_connect(mgr, out);
> +	if (r)
> +		return r;
> +
> +	return 0;
> +}
> +
> +static void omapdss_default_disconnect(struct omap_dss_device *dssdev)
> +{
> +	struct omap_dss_output *out;
> +	struct omap_overlay_manager *mgr;
> +
> +	out = dssdev->output;
> +
> +	if (out == NULL)
> +		return;
> +
> +	mgr = out->manager;
> +
> +	if (mgr == NULL)
> +		return;
> +
> +	dss_mgr_disconnect(mgr, out);
> +}
> +
>   int omap_dss_register_driver(struct omap_dss_driver *dssdriver)
>   {
>   	dssdriver->driver.bus = &dss_bus_type;
> @@ -384,6 +424,10 @@ int omap_dss_register_driver(struct omap_dss_driver *dssdriver)
>   			omapdss_default_get_recommended_bpp;
>   	if (dssdriver->get_timings == NULL)
>   		dssdriver->get_timings = omapdss_default_get_timings;
> +	if (dssdriver->connect == NULL)
> +		dssdriver->connect = omapdss_default_connect;
> +	if (dssdriver->disconnect == NULL)
> +		dssdriver->disconnect = omapdss_default_disconnect;

I was wondering if these should be apis rather than driver ops. One 
advantage of having them as functions used by omapfb/omapdrm would be 
that a panel driver wouldn't override the default_connect/disconnect ops.

Even though they are named omapdss_default_connect/disconnect, I don't 
think there is another option by which a panel driver may chose to 
connect to omapdss outputs, right?

Archit

Re: [PATCH 14/32] OMAPDSS: DSI: cleanup regulator init

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> Separate the regulator initialization code to its own function, removing
> duplicate code.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/video/omap2/dss/dsi.c | 82 ++++++++++++++++---------------------------
>   1 file changed, 31 insertions(+), 51 deletions(-)
>
> diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
> index bdddd0d..37ca980 100644
> --- a/drivers/video/omap2/dss/dsi.c
> +++ b/drivers/video/omap2/dss/dsi.c
> @@ -1114,6 +1114,30 @@ void dsi_runtime_put(struct platform_device *dsidev)
>   	WARN_ON(r < 0 && r != -ENOSYS);
>   }
>
> +static int dsi_regulator_init(struct platform_device *dsidev)
> +{
> +	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
> +	struct regulator *vdds_dsi;
> +
> +	if (dsi->vdds_dsi_reg != NULL)
> +		return 0;
> +
> +	vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
> +
> +	/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
> +	if (IS_ERR(vdds_dsi))
> +		vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
> +

We could use devm_ versions here too right?

Archit

> +	if (IS_ERR(vdds_dsi)) {
> +		DSSERR("can't get VDDS_DSI regulator\n");
> +		return PTR_ERR(vdds_dsi);
> +	}
> +
> +	dsi->vdds_dsi_reg = vdds_dsi;
> +
> +	return 0;
> +}
> +
>   /* source clock for DSI PLL. this could also be PCLKFREE */
>   static inline void dsi_enable_pll_clock(struct platform_device *dsidev,
>   		bool enable)
> @@ -1592,22 +1616,9 @@ int dsi_pll_init(struct platform_device *dsidev, bool enable_hsclk,
>   	 */
>   	enable_hsclk = enable_hsdiv = true;
>
> -	if (dsi->vdds_dsi_reg == NULL) {
> -		struct regulator *vdds_dsi;
> -
> -		vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
> -
> -		/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
> -		if (IS_ERR(vdds_dsi))
> -			vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
> -
> -		if (IS_ERR(vdds_dsi)) {
> -			DSSERR("can't get VDDS_DSI regulator\n");
> -			return PTR_ERR(vdds_dsi);
> -		}
> -
> -		dsi->vdds_dsi_reg = vdds_dsi;
> -	}
> +	r = dsi_regulator_init(dsidev);
> +	if (r)
> +		return r;
>
>   	dsi_enable_pll_clock(dsidev, 1);
>   	/*
> @@ -5225,34 +5236,6 @@ static enum omap_channel dsi_get_channel(int module_id)
>   	}
>   }
>
> -static int dsi_init_display(struct omap_dss_device *dssdev)
> -{
> -	struct platform_device *dsidev =
> -			dsi_get_dsidev_from_id(dssdev->phy.dsi.module);
> -	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
> -
> -	DSSDBG("DSI init\n");
> -
> -	if (dsi->vdds_dsi_reg == NULL) {
> -		struct regulator *vdds_dsi;
> -
> -		vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
> -
> -		/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
> -		if (IS_ERR(vdds_dsi))
> -			vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
> -
> -		if (IS_ERR(vdds_dsi)) {
> -			DSSERR("can't get VDDS_DSI regulator\n");
> -			return PTR_ERR(vdds_dsi);
> -		}
> -
> -		dsi->vdds_dsi_reg = vdds_dsi;
> -	}
> -
> -	return 0;
> -}
> -
>   int omap_dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
>   {
>   	struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
> @@ -5410,19 +5393,16 @@ static int dsi_probe_pdata(struct platform_device *dsidev)
>   	if (!plat_dssdev)
>   		return 0;
>
> +	r = dsi_regulator_init(dsidev);
> +	if (r)
> +		return r;
> +
>   	dssdev = dss_alloc_and_init_device(&dsidev->dev);
>   	if (!dssdev)
>   		return -ENOMEM;
>
>   	dss_copy_device_pdata(dssdev, plat_dssdev);
>
> -	r = dsi_init_display(dssdev);
> -	if (r) {
> -		DSSERR("device %s init failed: %d\n", dssdev->name, r);
> -		dss_put_device(dssdev);
> -		return r;
> -	}
> -
>   	r = omapdss_output_set_device(&dsi->output, dssdev);
>   	if (r) {
>   		DSSERR("failed to connect output to new device: %s\n",
>

Re: [PATCH 14/32] OMAPDSS: DSI: cleanup regulator init

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> Separate the regulator initialization code to its own function, removing
> duplicate code.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/video/omap2/dss/dsi.c | 82 ++++++++++++++++---------------------------
>   1 file changed, 31 insertions(+), 51 deletions(-)
>
> diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
> index bdddd0d..37ca980 100644
> --- a/drivers/video/omap2/dss/dsi.c
> +++ b/drivers/video/omap2/dss/dsi.c
> @@ -1114,6 +1114,30 @@ void dsi_runtime_put(struct platform_device *dsidev)
>   	WARN_ON(r < 0 && r != -ENOSYS);
>   }
>
> +static int dsi_regulator_init(struct platform_device *dsidev)
> +{
> +	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
> +	struct regulator *vdds_dsi;
> +
> +	if (dsi->vdds_dsi_reg != NULL)
> +		return 0;
> +
> +	vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
> +
> +	/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
> +	if (IS_ERR(vdds_dsi))
> +		vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
> +

We could use devm_ versions here too right?

Archit

> +	if (IS_ERR(vdds_dsi)) {
> +		DSSERR("can't get VDDS_DSI regulator\n");
> +		return PTR_ERR(vdds_dsi);
> +	}
> +
> +	dsi->vdds_dsi_reg = vdds_dsi;
> +
> +	return 0;
> +}
> +
>   /* source clock for DSI PLL. this could also be PCLKFREE */
>   static inline void dsi_enable_pll_clock(struct platform_device *dsidev,
>   		bool enable)
> @@ -1592,22 +1616,9 @@ int dsi_pll_init(struct platform_device *dsidev, bool enable_hsclk,
>   	 */
>   	enable_hsclk = enable_hsdiv = true;
>
> -	if (dsi->vdds_dsi_reg = NULL) {
> -		struct regulator *vdds_dsi;
> -
> -		vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
> -
> -		/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
> -		if (IS_ERR(vdds_dsi))
> -			vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
> -
> -		if (IS_ERR(vdds_dsi)) {
> -			DSSERR("can't get VDDS_DSI regulator\n");
> -			return PTR_ERR(vdds_dsi);
> -		}
> -
> -		dsi->vdds_dsi_reg = vdds_dsi;
> -	}
> +	r = dsi_regulator_init(dsidev);
> +	if (r)
> +		return r;
>
>   	dsi_enable_pll_clock(dsidev, 1);
>   	/*
> @@ -5225,34 +5236,6 @@ static enum omap_channel dsi_get_channel(int module_id)
>   	}
>   }
>
> -static int dsi_init_display(struct omap_dss_device *dssdev)
> -{
> -	struct platform_device *dsidev > -			dsi_get_dsidev_from_id(dssdev->phy.dsi.module);
> -	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
> -
> -	DSSDBG("DSI init\n");
> -
> -	if (dsi->vdds_dsi_reg = NULL) {
> -		struct regulator *vdds_dsi;
> -
> -		vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
> -
> -		/* DT HACK: try VCXIO to make omapdss work for o4 sdp/panda */
> -		if (IS_ERR(vdds_dsi))
> -			vdds_dsi = regulator_get(&dsi->pdev->dev, "VCXIO");
> -
> -		if (IS_ERR(vdds_dsi)) {
> -			DSSERR("can't get VDDS_DSI regulator\n");
> -			return PTR_ERR(vdds_dsi);
> -		}
> -
> -		dsi->vdds_dsi_reg = vdds_dsi;
> -	}
> -
> -	return 0;
> -}
> -
>   int omap_dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
>   {
>   	struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
> @@ -5410,19 +5393,16 @@ static int dsi_probe_pdata(struct platform_device *dsidev)
>   	if (!plat_dssdev)
>   		return 0;
>
> +	r = dsi_regulator_init(dsidev);
> +	if (r)
> +		return r;
> +
>   	dssdev = dss_alloc_and_init_device(&dsidev->dev);
>   	if (!dssdev)
>   		return -ENOMEM;
>
>   	dss_copy_device_pdata(dssdev, plat_dssdev);
>
> -	r = dsi_init_display(dssdev);
> -	if (r) {
> -		DSSERR("device %s init failed: %d\n", dssdev->name, r);
> -		dss_put_device(dssdev);
> -		return r;
> -	}
> -
>   	r = omapdss_output_set_device(&dsi->output, dssdev);
>   	if (r) {
>   		DSSERR("failed to connect output to new device: %s\n",
>

Re: [PATCH 15/32] OMAPDSS: DPI: cleanup pll & regulator init

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> Split regulator and DSI PLL init code to their own functions for
> clarity.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/video/omap2/dss/dpi.c | 100 ++++++++++++++++++++++--------------------
>   1 file changed, 53 insertions(+), 47 deletions(-)
>
> diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
> index 43f6b26..66ba9a6 100644
> --- a/drivers/video/omap2/dss/dpi.c
> +++ b/drivers/video/omap2/dss/dpi.c
> @@ -545,6 +545,53 @@ static int dpi_verify_dsi_pll(struct platform_device *dsidev)
>   	return 0;
>   }
>
> +static int dpi_init_regulator(void)
> +{
> +	struct regulator *vdds_dsi;
> +
> +	if (!dss_has_feature(FEAT_DPI_USES_VDDS_DSI))
> +		return 0;
> +
> +	if (dpi.vdds_dsi_reg)
> +		return 0;
> +
> +	vdds_dsi = dss_get_vdds_dsi();
> +
> +	if (!IS_ERR(vdds_dsi)) {
> +		dpi.vdds_dsi_from_core = true;
> +		dpi.vdds_dsi_reg = vdds_dsi;
> +		return 0;
> +	}
> +
> +	vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
> +	if (!IS_ERR(vdds_dsi)) {
> +		dpi.vdds_dsi_from_core = false;
> +		dpi.vdds_dsi_reg = vdds_dsi;
> +		return 0;
> +	}
> +
> +	return PTR_ERR(vdds_dsi);
> +}
> +
> +static void dpi_init_pll(void)
> +{
> +	struct platform_device *dsidev;
> +
> +	if (dpi.dsidev)
> +		return;
> +
> +	dsidev = dpi_get_dsidev(dpi.output.dispc_channel);
> +	if (!dsidev)
> +		return;
> +
> +	if (dpi_verify_dsi_pll(dsidev)) {
> +		DSSWARN("DSI PLL not operational\n");
> +		return;
> +	}
> +
> +	dpi.dsidev = dsidev;
> +}
> +
>   /*
>    * Return a hardcoded channel for the DPI output. This should work for
>    * current use cases, but this can be later expanded to either resolve
> @@ -575,46 +622,6 @@ static enum omap_channel dpi_get_channel(void)
>   	}
>   }
>
> -static int dpi_init_display(struct omap_dss_device *dssdev)
> -{
> -	struct platform_device *dsidev;
> -
> -	DSSDBG("init_display\n");
> -
> -	if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI) &&
> -					dpi.vdds_dsi_reg == NULL) {
> -		struct regulator *vdds_dsi;
> -
> -		vdds_dsi = dss_get_vdds_dsi();
> -		if (IS_ERR(vdds_dsi)) {
> -			vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");

same comment about devm_ usage here, and the next few patches.

Archit

Re: [PATCH 15/32] OMAPDSS: DPI: cleanup pll & regulator init

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> Split regulator and DSI PLL init code to their own functions for
> clarity.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/video/omap2/dss/dpi.c | 100 ++++++++++++++++++++++--------------------
>   1 file changed, 53 insertions(+), 47 deletions(-)
>
> diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
> index 43f6b26..66ba9a6 100644
> --- a/drivers/video/omap2/dss/dpi.c
> +++ b/drivers/video/omap2/dss/dpi.c
> @@ -545,6 +545,53 @@ static int dpi_verify_dsi_pll(struct platform_device *dsidev)
>   	return 0;
>   }
>
> +static int dpi_init_regulator(void)
> +{
> +	struct regulator *vdds_dsi;
> +
> +	if (!dss_has_feature(FEAT_DPI_USES_VDDS_DSI))
> +		return 0;
> +
> +	if (dpi.vdds_dsi_reg)
> +		return 0;
> +
> +	vdds_dsi = dss_get_vdds_dsi();
> +
> +	if (!IS_ERR(vdds_dsi)) {
> +		dpi.vdds_dsi_from_core = true;
> +		dpi.vdds_dsi_reg = vdds_dsi;
> +		return 0;
> +	}
> +
> +	vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
> +	if (!IS_ERR(vdds_dsi)) {
> +		dpi.vdds_dsi_from_core = false;
> +		dpi.vdds_dsi_reg = vdds_dsi;
> +		return 0;
> +	}
> +
> +	return PTR_ERR(vdds_dsi);
> +}
> +
> +static void dpi_init_pll(void)
> +{
> +	struct platform_device *dsidev;
> +
> +	if (dpi.dsidev)
> +		return;
> +
> +	dsidev = dpi_get_dsidev(dpi.output.dispc_channel);
> +	if (!dsidev)
> +		return;
> +
> +	if (dpi_verify_dsi_pll(dsidev)) {
> +		DSSWARN("DSI PLL not operational\n");
> +		return;
> +	}
> +
> +	dpi.dsidev = dsidev;
> +}
> +
>   /*
>    * Return a hardcoded channel for the DPI output. This should work for
>    * current use cases, but this can be later expanded to either resolve
> @@ -575,46 +622,6 @@ static enum omap_channel dpi_get_channel(void)
>   	}
>   }
>
> -static int dpi_init_display(struct omap_dss_device *dssdev)
> -{
> -	struct platform_device *dsidev;
> -
> -	DSSDBG("init_display\n");
> -
> -	if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI) &&
> -					dpi.vdds_dsi_reg = NULL) {
> -		struct regulator *vdds_dsi;
> -
> -		vdds_dsi = dss_get_vdds_dsi();
> -		if (IS_ERR(vdds_dsi)) {
> -			vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");

same comment about devm_ usage here, and the next few patches.

Archit

Re: [PATCH 12/32] OMAPDSS: Implement display (dis)connect support

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> We currently have two steps in panel initialization and startup: probing
> and enabling. After the panel has been probed, it's ready and can be
> configured and later enabled.
>
> This model is not enough with more complex display pipelines, where we
> may have, for example, two panels, of which only one can be used at a
> time, connected to the same video output.
>
> To support that kind of scenarios, we need to add new step to the
> initialization: connect.
>
> This patch adds support for connecting and disconnecting panels. After
> probe, but before connect, no panel ops should be called. When the
> connect is called, a proper video pipeline is established, and the panel
> is ready for use. If some part in the video pipeline is already
> connected (by some other panel), the connect call fails.
>
> One key difference with the old style setup is that connect() handles
> also connecting to the overlay manager. This means that the omapfb (or
> omapdrm) no longer needs to figure out which overlay manager to use, but
> it can just call connect() on the panel, and the proper overlay manager
> is connected by omapdss.
>
> This also allows us to add back the support for dynamic switching
> between two exclusive panels. However, the current panel device model is
> not changed to support this, as the new device model is implemented in
> the following patches and the old model will be removed. The new device
> model supports dynamic switching.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>   drivers/gpu/drm/omapdrm/omap_crtc.c      | 24 +++++++++++++++++
>   drivers/gpu/drm/omapdrm/omap_drv.c       | 12 ++++++++-
>   drivers/video/omap2/dss/apply.c          | 14 ++++++++++
>   drivers/video/omap2/dss/core.c           | 44 +++++++++++++++++++++++++++++++
>   drivers/video/omap2/dss/display-sysfs.c  | 28 +++++++++++---------
>   drivers/video/omap2/dss/manager-sysfs.c  | 45 ++++++++++++++++++++------------
>   drivers/video/omap2/dss/output.c         | 14 ++++++++++
>   drivers/video/omap2/omapfb/omapfb-main.c | 25 ++++++++++--------
>   include/video/omapdss.h                  | 23 ++++++++++++++++
>   9 files changed, 188 insertions(+), 41 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
> index 02075bf..b2ab2f5 100644
> --- a/drivers/gpu/drm/omapdrm/omap_crtc.c
> +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
> @@ -94,6 +94,28 @@ uint32_t pipe2vbl(struct drm_crtc *crtc)
>   static struct omap_crtc *omap_crtcs[8];
>
>   /* we can probably ignore these until we support command-mode panels: */
> +static int omap_crtc_connect(struct omap_overlay_manager *mgr,
> +		struct omap_dss_output *dst)
> +{
> +	if (mgr->output)
> +		return -EINVAL;
> +
> +	if ((mgr->supported_outputs & dst->id) = 0)
> +		return -EINVAL;
> +
> +	dst->manager = mgr;
> +	mgr->output = dst;
> +
> +	return 0;
> +}
> +
> +static void omap_crtc_disconnect(struct omap_overlay_manager *mgr,
> +		struct omap_dss_output *dst)
> +{
> +	mgr->output->manager = NULL;
> +	mgr->output = NULL;
> +}
> +
>   static void omap_crtc_start_update(struct omap_overlay_manager *mgr)
>   {
>   }
> @@ -138,6 +160,8 @@ static void omap_crtc_unregister_framedone_handler(
>   }
>
>   static const struct dss_mgr_ops mgr_ops = {
> +		.connect = omap_crtc_connect,
> +		.disconnect = omap_crtc_disconnect,
>   		.start_update = omap_crtc_start_update,
>   		.enable = omap_crtc_enable,
>   		.disable = omap_crtc_disable,
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
> index f8947f9..58bd259 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.c
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.c
> @@ -97,6 +97,7 @@ static int omap_modeset_init(struct drm_device *dev)
>   	int num_mgrs = dss_feat_get_num_mgrs();
>   	int num_crtcs;
>   	int i, id = 0;
> +	int r;
>
>   	omap_crtc_pre_init();
>
> @@ -118,6 +119,7 @@ static int omap_modeset_init(struct drm_device *dev)
>   		struct drm_connector *connector;
>   		struct drm_encoder *encoder;
>   		enum omap_channel channel;
> +		struct omap_overlay_manager *mgr;
>
>   		if (!dssdev->driver) {
>   			dev_warn(dev->dev, "%s has no driver.. skipping it\n",
> @@ -133,6 +135,13 @@ static int omap_modeset_init(struct drm_device *dev)
>   			continue;
>   		}
>
> +		r = dssdev->driver->connect(dssdev);
> +		if (r) {
> +			dev_err(dev->dev, "could not connect display: %s\n",
> +					dssdev->name);
> +			continue;
> +		}
> +
>   		encoder = omap_encoder_init(dev, dssdev);
>
>   		if (!encoder) {
> @@ -174,8 +183,9 @@ static int omap_modeset_init(struct drm_device *dev)
>   		 * other possible channels to which the encoder can connect are
>   		 * not considered.
>   		 */
> -		channel = dssdev->output->dispc_channel;
>
> +		mgr = omapdss_find_mgr_from_display(dssdev);
> +		channel = mgr->id;
>   		/*
>   		 * if this channel hasn't already been taken by a previously
>   		 * allocated crtc, we create a new crtc for it
> diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
> index c844071..dbd3c2f 100644
> --- a/drivers/video/omap2/dss/apply.c
> +++ b/drivers/video/omap2/dss/apply.c
> @@ -790,6 +790,18 @@ static void mgr_clear_shadow_dirty(struct omap_overlay_manager *mgr)
>   	}
>   }
>
> +static int dss_mgr_connect_compat(struct omap_overlay_manager *mgr,
> +		struct omap_dss_output *dst)
> +{
> +	return mgr->set_output(mgr, dst);
> +}
> +
> +static void dss_mgr_disconnect_compat(struct omap_overlay_manager *mgr,
> +		struct omap_dss_output *dst)
> +{
> +	mgr->unset_output(mgr);
> +}
> +
>   static void dss_mgr_start_update_compat(struct omap_overlay_manager *mgr)
>   {
>   	struct mgr_priv_data *mp = get_mgr_priv(mgr);
> @@ -1552,6 +1564,8 @@ static void dss_mgr_unregister_framedone_handler_compat(struct omap_overlay_mana
>   }
>
>   static const struct dss_mgr_ops apply_mgr_ops = {
> +	.connect = dss_mgr_connect_compat,
> +	.disconnect = dss_mgr_disconnect_compat,
>   	.start_update = dss_mgr_start_update_compat,
>   	.enable = dss_mgr_enable_compat,
>   	.disable = dss_mgr_disable_compat,
> diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
> index 502ec1b..4bd8f79 100644
> --- a/drivers/video/omap2/dss/core.c
> +++ b/drivers/video/omap2/dss/core.c
> @@ -371,6 +371,46 @@ static int dss_driver_remove(struct device *dev)
>   	return 0;
>   }
>
> +static int omapdss_default_connect(struct omap_dss_device *dssdev)
> +{
> +	struct omap_dss_output *out;
> +	struct omap_overlay_manager *mgr;
> +	int r;
> +
> +	out = dssdev->output;
> +
> +	if (out = NULL)
> +		return -ENODEV;
> +
> +	mgr = omap_dss_get_overlay_manager(out->dispc_channel);
> +	if (!mgr)
> +		return -ENODEV;
> +
> +	r = dss_mgr_connect(mgr, out);
> +	if (r)
> +		return r;
> +
> +	return 0;
> +}
> +
> +static void omapdss_default_disconnect(struct omap_dss_device *dssdev)
> +{
> +	struct omap_dss_output *out;
> +	struct omap_overlay_manager *mgr;
> +
> +	out = dssdev->output;
> +
> +	if (out = NULL)
> +		return;
> +
> +	mgr = out->manager;
> +
> +	if (mgr = NULL)
> +		return;
> +
> +	dss_mgr_disconnect(mgr, out);
> +}
> +
>   int omap_dss_register_driver(struct omap_dss_driver *dssdriver)
>   {
>   	dssdriver->driver.bus = &dss_bus_type;
> @@ -384,6 +424,10 @@ int omap_dss_register_driver(struct omap_dss_driver *dssdriver)
>   			omapdss_default_get_recommended_bpp;
>   	if (dssdriver->get_timings = NULL)
>   		dssdriver->get_timings = omapdss_default_get_timings;
> +	if (dssdriver->connect = NULL)
> +		dssdriver->connect = omapdss_default_connect;
> +	if (dssdriver->disconnect = NULL)
> +		dssdriver->disconnect = omapdss_default_disconnect;

I was wondering if these should be apis rather than driver ops. One 
advantage of having them as functions used by omapfb/omapdrm would be 
that a panel driver wouldn't override the default_connect/disconnect ops.

Even though they are named omapdss_default_connect/disconnect, I don't 
think there is another option by which a panel driver may chose to 
connect to omapdss outputs, right?

Archit

Re: [PATCH 19/32] OMAPDSS: add videomode conversion support

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> Add helper functions to convert between omapdss specific video timings
> and the common videomode.
>
> Eventually omapdss will be changed to use only the common video timings,
> and these helper functions will make the transition easier.

So we now use omap_video_timings, videomode, drm_display_mode, and 
fb_var_screeninfo, fun! :)

Archit

Re: [PATCH 19/32] OMAPDSS: add videomode conversion support

[Archit Taneja]

On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
> Add helper functions to convert between omapdss specific video timings
> and the common videomode.
>
> Eventually omapdss will be changed to use only the common video timings,
> and these helper functions will make the transition easier.

So we now use omap_video_timings, videomode, drm_display_mode, and 
fb_var_screeninfo, fun! :)

Archit

Re: [PATCH 12/32] OMAPDSS: Implement display (dis)connect support

[Tomi Valkeinen]

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On 07/06/13 09:46, Archit Taneja wrote:

>> @@ -384,6 +424,10 @@ int omap_dss_register_driver(struct
>> omap_dss_driver *dssdriver)
>>               omapdss_default_get_recommended_bpp;
>>       if (dssdriver->get_timings == NULL)
>>           dssdriver->get_timings = omapdss_default_get_timings;
>> +    if (dssdriver->connect == NULL)
>> +        dssdriver->connect = omapdss_default_connect;
>> +    if (dssdriver->disconnect == NULL)
>> +        dssdriver->disconnect = omapdss_default_disconnect;
> 
> I was wondering if these should be apis rather than driver ops. One
> advantage of having them as functions used by omapfb/omapdrm would be
> that a panel driver wouldn't override the default_connect/disconnect ops.
> 
> Even though they are named omapdss_default_connect/disconnect, I don't
> think there is another option by which a panel driver may chose to
> connect to omapdss outputs, right?

Those "default" functions are used only for the old panel drivers, and
are removed when the old drivers are not needed anymore. They allow us
to add the connect support without modifying the old drivers.

The new drivers may do other stuff in connect/disconnect. For example,
see panel-dsicm.c.

 Tomi



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Re: [PATCH 12/32] OMAPDSS: Implement display (dis)connect support

[Tomi Valkeinen]

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On 07/06/13 09:46, Archit Taneja wrote:

>> @@ -384,6 +424,10 @@ int omap_dss_register_driver(struct
>> omap_dss_driver *dssdriver)
>>               omapdss_default_get_recommended_bpp;
>>       if (dssdriver->get_timings == NULL)
>>           dssdriver->get_timings = omapdss_default_get_timings;
>> +    if (dssdriver->connect == NULL)
>> +        dssdriver->connect = omapdss_default_connect;
>> +    if (dssdriver->disconnect == NULL)
>> +        dssdriver->disconnect = omapdss_default_disconnect;
> 
> I was wondering if these should be apis rather than driver ops. One
> advantage of having them as functions used by omapfb/omapdrm would be
> that a panel driver wouldn't override the default_connect/disconnect ops.
> 
> Even though they are named omapdss_default_connect/disconnect, I don't
> think there is another option by which a panel driver may chose to
> connect to omapdss outputs, right?

Those "default" functions are used only for the old panel drivers, and
are removed when the old drivers are not needed anymore. They allow us
to add the connect support without modifying the old drivers.

The new drivers may do other stuff in connect/disconnect. For example,
see panel-dsicm.c.

 Tomi



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Re: [PATCH 19/32] OMAPDSS: add videomode conversion support

[Tomi Valkeinen]

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On 07/06/13 10:06, Archit Taneja wrote:
> On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
>> Add helper functions to convert between omapdss specific video timings
>> and the common videomode.
>>
>> Eventually omapdss will be changed to use only the common video timings,
>> and these helper functions will make the transition easier.
> 
> So we now use omap_video_timings, videomode, drm_display_mode, and
> fb_var_screeninfo, fun! :)

Yes, although videomode is only used when passing videomode from the
board file. I wanted to make that right from the start.
omap_video_timings is still used everywhere else in omapdss.

 Tomi



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Re: [PATCH 19/32] OMAPDSS: add videomode conversion support

[Tomi Valkeinen]

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On 07/06/13 10:06, Archit Taneja wrote:
> On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
>> Add helper functions to convert between omapdss specific video timings
>> and the common videomode.
>>
>> Eventually omapdss will be changed to use only the common video timings,
>> and these helper functions will make the transition easier.
> 
> So we now use omap_video_timings, videomode, drm_display_mode, and
> fb_var_screeninfo, fun! :)

Yes, although videomode is only used when passing videomode from the
board file. I wanted to make that right from the start.
omap_video_timings is still used everywhere else in omapdss.

 Tomi



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Re: [PATCH 15/32] OMAPDSS: DPI: cleanup pll & regulator init

[Tomi Valkeinen]

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On 07/06/13 09:51, Archit Taneja wrote:

>> -static int dpi_init_display(struct omap_dss_device *dssdev)
>> -{
>> -    struct platform_device *dsidev;
>> -
>> -    DSSDBG("init_display\n");
>> -
>> -    if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI) &&
>> -                    dpi.vdds_dsi_reg == NULL) {
>> -        struct regulator *vdds_dsi;
>> -
>> -        vdds_dsi = dss_get_vdds_dsi();
>> -        if (IS_ERR(vdds_dsi)) {
>> -            vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
> 
> same comment about devm_ usage here, and the next few patches.

Yes, good point. And that allows us to get rid of the 'vdds_dsi_from_core'.

 Tomi



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Re: [PATCH 15/32] OMAPDSS: DPI: cleanup pll & regulator init

[Tomi Valkeinen]

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On 07/06/13 09:51, Archit Taneja wrote:

>> -static int dpi_init_display(struct omap_dss_device *dssdev)
>> -{
>> -    struct platform_device *dsidev;
>> -
>> -    DSSDBG("init_display\n");
>> -
>> -    if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI) &&
>> -                    dpi.vdds_dsi_reg == NULL) {
>> -        struct regulator *vdds_dsi;
>> -
>> -        vdds_dsi = dss_get_vdds_dsi();
>> -        if (IS_ERR(vdds_dsi)) {
>> -            vdds_dsi = regulator_get(&dpi.pdev->dev, "vdds_dsi");
> 
> same comment about devm_ usage here, and the next few patches.

Yes, good point. And that allows us to get rid of the 'vdds_dsi_from_core'.

 Tomi



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Re: [PATCH 10/32] OMAPDSS: split overlay manager creation

[Tomi Valkeinen]

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On 07/06/13 09:19, Archit Taneja wrote:
> On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
>> Split the function that creates overlay manager structs into two: one
>> that creates just the structs, and one that creates the sysfs files for
>> the manager.
>>
>> This will help us use the overlay manager structs with omapdrm in the
>> following patches, while still leaving the sysfs files out.
> 
> Maybe the omapdss Makefile should also reflect this change, we could
> move manager.o so that it doesn't look like a compat file any more.

It's not quite non-compat file either, as it has compat code also. So
more refactoring is needed if to make a proper compat/non-compat
division. I'll keep it unchanged for the moment, but at some point it'd
be nice to compile the compat stuff only if omapfb is enabled. Or, maybe
move the compat stuff into omapfb (but that gives a problem with omap_vout).

 Tomi



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Re: [PATCH 10/32] OMAPDSS: split overlay manager creation

[Tomi Valkeinen]

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On 07/06/13 09:19, Archit Taneja wrote:
> On Thursday 30 May 2013 03:04 PM, Tomi Valkeinen wrote:
>> Split the function that creates overlay manager structs into two: one
>> that creates just the structs, and one that creates the sysfs files for
>> the manager.
>>
>> This will help us use the overlay manager structs with omapdrm in the
>> following patches, while still leaving the sysfs files out.
> 
> Maybe the omapdss Makefile should also reflect this change, we could
> move manager.o so that it doesn't look like a compat file any more.

It's not quite non-compat file either, as it has compat code also. So
more refactoring is needed if to make a proper compat/non-compat
division. I'll keep it unchanged for the moment, but at some point it'd
be nice to compile the compat stuff only if omapfb is enabled. Or, maybe
move the compat stuff into omapfb (but that gives a problem with omap_vout).

 Tomi



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