[PATCH v2 0/9] drm/cma-helper drivers: Use drm_fbdev_generic_setup()

[PATCH v2 0/9] drm/cma-helper drivers: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

This patchset moves the drivers using the CMA helper fully over to the
generic fbdev emulation.

These are the remaining patches that didn't get a driver maintainer ack
or has been rebased.

For context, this is part 1 of the generic fbdev emulation:
drm: Add generic fbdev emulation
https://patchwork.freedesktop.org/series/45848/

Noralf.

Cc: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Xinliang Liu <z.liuxinliang@hisilicon.com>
Cc: Rongrong Zou <zourongrong@gmail.com>
Cc: Xinwei Kong <kong.kongxinwei@hisilicon.com>
Cc: Chen Feng <puck.chen@hisilicon.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Boris Brezillon <boris.brezillon@bootlin.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Jyri Sarha <jsarha@ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>

Noralf Trønnes (9):
  drm/arc: Use drm_fbdev_generic_setup()
  drm/fsl-dcu: Use drm_fbdev_generic_setup()
  drm/hisilicon/kirin: Use drm_fbdev_generic_setup()
  drm/mxsfb: Use drm_fbdev_generic_setup()
  drm/rcar-du: Use drm_fbdev_generic_setup()
  drm/atmel-hlcdc: Use drm_fbdev_generic_setup()
  drm/sun4i: Use drm_fbdev_generic_setup()
  drm/tilcdc: Use drm_fbdev_generic_setup()
  drm/cma-helper: Remove unused fbdev code

 drivers/gpu/drm/Kconfig                         |   4 -
 drivers/gpu/drm/arc/arcpgu.h                    |   4 -
 drivers/gpu/drm/arc/arcpgu_drv.c                |  33 +-----
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c    |   7 +-
 drivers/gpu/drm/drm_fb_cma_helper.c             | 130 ------------------------
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c       |  25 +----
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h       |   1 -
 drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c |  38 +------
 drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h |   4 -
 drivers/gpu/drm/mxsfb/mxsfb_drv.c               |  26 +----
 drivers/gpu/drm/mxsfb/mxsfb_drv.h               |   1 -
 drivers/gpu/drm/rcar-du/rcar_du_drv.c           |  15 +--
 drivers/gpu/drm/rcar-du/rcar_du_drv.h           |   2 -
 drivers/gpu/drm/rcar-du/rcar_du_kms.c           |  21 ----
 drivers/gpu/drm/sun4i/sun4i_drv.c               |  12 +--
 drivers/gpu/drm/sun4i/sun4i_framebuffer.c       |  12 +--
 drivers/gpu/drm/sun4i/sun4i_framebuffer.h       |   3 +-
 drivers/gpu/drm/tilcdc/tilcdc_drv.c             |  11 +-
 include/drm/drm_fb_cma_helper.h                 |  22 ----
 19 files changed, 24 insertions(+), 347 deletions(-)

-- 
2.15.1

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[PATCH v2 1/9] drm/arc: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

The CMA helper is already using the drm_fb_helper_generic_probe part of
the generic fbdev emulation. This patch makes full use of the generic
fbdev emulation by using its drm_client callbacks. This means that
drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
now handled by the emulation code. Additionally fbdev unregister happens
automatically on drm_dev_unregister().

The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
driver. This is done to highlight the fact that fbdev emulation is an
internal client that makes use of the driver, it is not part of the
driver as such. If fbdev setup fails, an error is printed, but the driver
succeeds probing.

Cc: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
---

Changes since version 1:
- Rebased

 drivers/gpu/drm/arc/arcpgu.h     |  4 ----
 drivers/gpu/drm/arc/arcpgu_drv.c | 33 +++------------------------------
 2 files changed, 3 insertions(+), 34 deletions(-)

diff --git a/drivers/gpu/drm/arc/arcpgu.h b/drivers/gpu/drm/arc/arcpgu.h
index e8fcf3ab1d9a..90ef76b19f8a 100644
--- a/drivers/gpu/drm/arc/arcpgu.h
+++ b/drivers/gpu/drm/arc/arcpgu.h
@@ -20,7 +20,6 @@
 struct arcpgu_drm_private {
 	void __iomem		*regs;
 	struct clk		*clk;
-	struct drm_fbdev_cma	*fbdev;
 	struct drm_framebuffer	*fb;
 	struct drm_crtc		crtc;
 	struct drm_plane	*plane;
@@ -43,8 +42,5 @@ static inline u32 arc_pgu_read(struct arcpgu_drm_private *arcpgu,
 int arc_pgu_setup_crtc(struct drm_device *dev);
 int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np);
 int arcpgu_drm_sim_init(struct drm_device *drm, struct device_node *np);
-struct drm_fbdev_cma *arcpgu_fbdev_cma_init(struct drm_device *dev,
-	unsigned int preferred_bpp, unsigned int num_crtc,
-	unsigned int max_conn_count);
 
 #endif
diff --git a/drivers/gpu/drm/arc/arcpgu_drv.c b/drivers/gpu/drm/arc/arcpgu_drv.c
index e85e3a349f24..2af847ebca34 100644
--- a/drivers/gpu/drm/arc/arcpgu_drv.c
+++ b/drivers/gpu/drm/arc/arcpgu_drv.c
@@ -17,6 +17,7 @@
 #include <linux/clk.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_atomic_helper.h>
@@ -25,16 +26,8 @@
 #include "arcpgu.h"
 #include "arcpgu_regs.h"
 
-static void arcpgu_fb_output_poll_changed(struct drm_device *dev)
-{
-	struct arcpgu_drm_private *arcpgu = dev->dev_private;
-
-	drm_fbdev_cma_hotplug_event(arcpgu->fbdev);
-}
-
 static const struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = {
 	.fb_create  = drm_gem_fb_create,
-	.output_poll_changed = arcpgu_fb_output_poll_changed,
 	.atomic_check = drm_atomic_helper_check,
 	.atomic_commit = drm_atomic_helper_commit,
 };
@@ -51,13 +44,6 @@ static void arcpgu_setup_mode_config(struct drm_device *drm)
 
 DEFINE_DRM_GEM_CMA_FOPS(arcpgu_drm_ops);
 
-static void arcpgu_lastclose(struct drm_device *drm)
-{
-	struct arcpgu_drm_private *arcpgu = drm->dev_private;
-
-	drm_fbdev_cma_restore_mode(arcpgu->fbdev);
-}
-
 static int arcpgu_load(struct drm_device *drm)
 {
 	struct platform_device *pdev = to_platform_device(drm->dev);
@@ -113,26 +99,12 @@ static int arcpgu_load(struct drm_device *drm)
 	drm_mode_config_reset(drm);
 	drm_kms_helper_poll_init(drm);
 
-	arcpgu->fbdev = drm_fbdev_cma_init(drm, 16,
-					   drm->mode_config.num_connector);
-	if (IS_ERR(arcpgu->fbdev)) {
-		ret = PTR_ERR(arcpgu->fbdev);
-		arcpgu->fbdev = NULL;
-		return -ENODEV;
-	}
-
 	platform_set_drvdata(pdev, drm);
 	return 0;
 }
 
 static int arcpgu_unload(struct drm_device *drm)
 {
-	struct arcpgu_drm_private *arcpgu = drm->dev_private;
-
-	if (arcpgu->fbdev) {
-		drm_fbdev_cma_fini(arcpgu->fbdev);
-		arcpgu->fbdev = NULL;
-	}
 	drm_kms_helper_poll_fini(drm);
 	drm_atomic_helper_shutdown(drm);
 	drm_mode_config_cleanup(drm);
@@ -168,7 +140,6 @@ static int arcpgu_debugfs_init(struct drm_minor *minor)
 static struct drm_driver arcpgu_drm_driver = {
 	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
 			   DRIVER_ATOMIC,
-	.lastclose = arcpgu_lastclose,
 	.name = "arcpgu",
 	.desc = "ARC PGU Controller",
 	.date = "20160219",
@@ -211,6 +182,8 @@ static int arcpgu_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_unload;
 
+	drm_fbdev_generic_setup(drm, 16);
+
 	return 0;
 
 err_unload:
-- 
2.15.1

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[PATCH v2 2/9] drm/fsl-dcu: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

The CMA helper is already using the drm_fb_helper_generic_probe part of
the generic fbdev emulation. This patch makes full use of the generic
fbdev emulation by using its drm_client callbacks. This means that
drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
now handled by the emulation code. Additionally fbdev unregister happens
automatically on drm_dev_unregister().

The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
driver. This is done to highlight the fact that fbdev emulation is an
internal client that makes use of the driver, it is not part of the
driver as such. If fbdev setup fails, an error is printed, but the driver
succeeds probing.

Cc: Stefan Agner <stefan@agner.ch>
Cc: Alison Wang <alison.wang@nxp.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Stefan Agner <stefan@agner.ch>
---

Changes since version 1:
- Rebased

 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 25 +++----------------------
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h |  1 -
 2 files changed, 3 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
index 0496be5212e1..ceddc3e29258 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -26,6 +26,7 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_modeset_helper.h>
 
@@ -89,20 +90,11 @@ static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
 			"Invalid legacyfb_depth.  Defaulting to 24bpp\n");
 		legacyfb_depth = 24;
 	}
-	fsl_dev->fbdev = drm_fbdev_cma_init(dev, legacyfb_depth, 1);
-	if (IS_ERR(fsl_dev->fbdev)) {
-		ret = PTR_ERR(fsl_dev->fbdev);
-		fsl_dev->fbdev = NULL;
-		goto done;
-	}
 
 	return 0;
 done:
 	drm_kms_helper_poll_fini(dev);
 
-	if (fsl_dev->fbdev)
-		drm_fbdev_cma_fini(fsl_dev->fbdev);
-
 	drm_mode_config_cleanup(dev);
 	drm_irq_uninstall(dev);
 	dev->dev_private = NULL;
@@ -112,14 +104,9 @@ static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
 
 static void fsl_dcu_unload(struct drm_device *dev)
 {
-	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
-
 	drm_atomic_helper_shutdown(dev);
 	drm_kms_helper_poll_fini(dev);
 
-	if (fsl_dev->fbdev)
-		drm_fbdev_cma_fini(fsl_dev->fbdev);
-
 	drm_mode_config_cleanup(dev);
 	drm_irq_uninstall(dev);
 
@@ -147,19 +134,11 @@ static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
-static void fsl_dcu_drm_lastclose(struct drm_device *dev)
-{
-	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
-
-	drm_fbdev_cma_restore_mode(fsl_dev->fbdev);
-}
-
 DEFINE_DRM_GEM_CMA_FOPS(fsl_dcu_drm_fops);
 
 static struct drm_driver fsl_dcu_drm_driver = {
 	.driver_features	= DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
 				| DRIVER_PRIME | DRIVER_ATOMIC,
-	.lastclose		= fsl_dcu_drm_lastclose,
 	.load			= fsl_dcu_load,
 	.unload			= fsl_dcu_unload,
 	.irq_handler		= fsl_dcu_drm_irq,
@@ -355,6 +334,8 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto put;
 
+	drm_fbdev_generic_setup(drm, legacyfb_depth);
+
 	return 0;
 
 put:
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
index 93bfb98012d4..cb87bb74cb87 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
@@ -191,7 +191,6 @@ struct fsl_dcu_drm_device {
 	/*protects hardware register*/
 	spinlock_t irq_lock;
 	struct drm_device *drm;
-	struct drm_fbdev_cma *fbdev;
 	struct drm_crtc crtc;
 	struct drm_encoder encoder;
 	struct fsl_dcu_drm_connector connector;
-- 
2.15.1

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[PATCH v2 3/9] drm/hisilicon/kirin: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

The CMA helper is already using the drm_fb_helper_generic_probe part of
the generic fbdev emulation. This patch makes full use of the generic
fbdev emulation by using its drm_client callbacks. This means that
drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
now handled by the emulation code. Additionally fbdev unregister happens
automatically on drm_dev_unregister().

The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
driver. This is done to highlight the fact that fbdev emulation is an
internal client that makes use of the driver, it is not part of the
driver as such. If fbdev setup fails, an error is printed, but the driver
succeeds probing.

struct kirin_drm_private can be removed now that driver doesn't have to
store the fbdev pointer.

Cc: Xinliang Liu <z.liuxinliang@hisilicon.com>
Cc: Rongrong Zou <zourongrong@gmail.com>
Cc: Xinwei Kong <kong.kongxinwei@hisilicon.com>
Cc: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
---
 drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c | 38 ++-----------------------
 drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h |  4 ---
 2 files changed, 3 insertions(+), 39 deletions(-)

diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
index e6a62d5a00a3..15e32e5d9101 100644
--- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
+++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
@@ -22,6 +22,7 @@
 #include <drm/drmP.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
@@ -33,32 +34,15 @@ static struct kirin_dc_ops *dc_ops;
 
 static int kirin_drm_kms_cleanup(struct drm_device *dev)
 {
-	struct kirin_drm_private *priv = dev->dev_private;
-
-	if (priv->fbdev) {
-		drm_fbdev_cma_fini(priv->fbdev);
-		priv->fbdev = NULL;
-	}
-
 	drm_kms_helper_poll_fini(dev);
 	dc_ops->cleanup(to_platform_device(dev->dev));
 	drm_mode_config_cleanup(dev);
-	devm_kfree(dev->dev, priv);
-	dev->dev_private = NULL;
 
 	return 0;
 }
 
-static void kirin_fbdev_output_poll_changed(struct drm_device *dev)
-{
-	struct kirin_drm_private *priv = dev->dev_private;
-
-	drm_fbdev_cma_hotplug_event(priv->fbdev);
-}
-
 static const struct drm_mode_config_funcs kirin_drm_mode_config_funcs = {
 	.fb_create = drm_gem_fb_create,
-	.output_poll_changed = kirin_fbdev_output_poll_changed,
 	.atomic_check = drm_atomic_helper_check,
 	.atomic_commit = drm_atomic_helper_commit,
 };
@@ -76,14 +60,8 @@ static void kirin_drm_mode_config_init(struct drm_device *dev)
 
 static int kirin_drm_kms_init(struct drm_device *dev)
 {
-	struct kirin_drm_private *priv;
 	int ret;
 
-	priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
-	if (!priv)
-		return -ENOMEM;
-
-	dev->dev_private = priv;
 	dev_set_drvdata(dev->dev, dev);
 
 	/* dev->mode_config initialization */
@@ -117,26 +95,14 @@ static int kirin_drm_kms_init(struct drm_device *dev)
 	/* init kms poll for handling hpd */
 	drm_kms_helper_poll_init(dev);
 
-	priv->fbdev = drm_fbdev_cma_init(dev, 32,
-					 dev->mode_config.num_connector);
-
-	if (IS_ERR(priv->fbdev)) {
-		DRM_ERROR("failed to initialize fbdev.\n");
-		ret = PTR_ERR(priv->fbdev);
-		goto err_cleanup_poll;
-	}
 	return 0;
 
-err_cleanup_poll:
-	drm_kms_helper_poll_fini(dev);
 err_unbind_all:
 	component_unbind_all(dev->dev, dev);
 err_dc_cleanup:
 	dc_ops->cleanup(to_platform_device(dev->dev));
 err_mode_config_cleanup:
 	drm_mode_config_cleanup(dev);
-	devm_kfree(dev->dev, priv);
-	dev->dev_private = NULL;
 
 	return ret;
 }
@@ -199,6 +165,8 @@ static int kirin_drm_bind(struct device *dev)
 	if (ret)
 		goto err_kms_cleanup;
 
+	drm_fbdev_generic_setup(drm_dev, 32);
+
 	return 0;
 
 err_kms_cleanup:
diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h
index 56cb62df065c..ad027d1cc826 100644
--- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h
+++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h
@@ -19,10 +19,6 @@ struct kirin_dc_ops {
 	void (*cleanup)(struct platform_device *pdev);
 };
 
-struct kirin_drm_private {
-	struct drm_fbdev_cma *fbdev;
-};
-
 extern const struct kirin_dc_ops ade_dc_ops;
 
 #endif /* __KIRIN_DRM_DRV_H__ */
-- 
2.15.1

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[PATCH v2 4/9] drm/mxsfb: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

The CMA helper is already using the drm_fb_helper_generic_probe part of
the generic fbdev emulation. This patch makes full use of the generic
fbdev emulation by using its drm_client callbacks. This means that
drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
now handled by the emulation code. Additionally fbdev unregister happens
automatically on drm_dev_unregister().

The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
driver. This is done to highlight the fact that fbdev emulation is an
internal client that makes use of the driver, it is not part of the
driver as such. If fbdev setup fails, an error is printed, but the driver
succeeds probing.

Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
---
 drivers/gpu/drm/mxsfb/mxsfb_drv.c | 26 ++------------------------
 drivers/gpu/drm/mxsfb/mxsfb_drv.h |  1 -
 2 files changed, 2 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
index 2393e6d16ffd..3a8cc4226a4b 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
@@ -263,23 +263,12 @@ static int mxsfb_load(struct drm_device *drm, unsigned long flags)
 
 	drm_kms_helper_poll_init(drm);
 
-	mxsfb->fbdev = drm_fbdev_cma_init(drm, 32,
-					  drm->mode_config.num_connector);
-	if (IS_ERR(mxsfb->fbdev)) {
-		ret = PTR_ERR(mxsfb->fbdev);
-		mxsfb->fbdev = NULL;
-		dev_err(drm->dev, "Failed to init FB CMA area\n");
-		goto err_cma;
-	}
-
 	platform_set_drvdata(pdev, drm);
 
 	drm_helper_hpd_irq_event(drm);
 
 	return 0;
 
-err_cma:
-	drm_irq_uninstall(drm);
 err_irq:
 	drm_panel_detach(mxsfb->panel);
 err_vblank:
@@ -290,11 +279,6 @@ static int mxsfb_load(struct drm_device *drm, unsigned long flags)
 
 static void mxsfb_unload(struct drm_device *drm)
 {
-	struct mxsfb_drm_private *mxsfb = drm->dev_private;
-
-	if (mxsfb->fbdev)
-		drm_fbdev_cma_fini(mxsfb->fbdev);
-
 	drm_kms_helper_poll_fini(drm);
 	drm_mode_config_cleanup(drm);
 
@@ -307,13 +291,6 @@ static void mxsfb_unload(struct drm_device *drm)
 	pm_runtime_disable(drm->dev);
 }
 
-static void mxsfb_lastclose(struct drm_device *drm)
-{
-	struct mxsfb_drm_private *mxsfb = drm->dev_private;
-
-	drm_fbdev_cma_restore_mode(mxsfb->fbdev);
-}
-
 static void mxsfb_irq_preinstall(struct drm_device *drm)
 {
 	struct mxsfb_drm_private *mxsfb = drm->dev_private;
@@ -347,7 +324,6 @@ static struct drm_driver mxsfb_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET |
 				  DRIVER_PRIME | DRIVER_ATOMIC |
 				  DRIVER_HAVE_IRQ,
-	.lastclose		= mxsfb_lastclose,
 	.irq_handler		= mxsfb_irq_handler,
 	.irq_preinstall		= mxsfb_irq_preinstall,
 	.irq_uninstall		= mxsfb_irq_preinstall,
@@ -412,6 +388,8 @@ static int mxsfb_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_unload;
 
+	drm_fbdev_generic_setup(drm, 32);
+
 	return 0;
 
 err_unload:
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.h b/drivers/gpu/drm/mxsfb/mxsfb_drv.h
index 5d0883fc805b..bedd6801edca 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_drv.h
+++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.h
@@ -37,7 +37,6 @@ struct mxsfb_drm_private {
 	struct drm_simple_display_pipe	pipe;
 	struct drm_connector		connector;
 	struct drm_panel		*panel;
-	struct drm_fbdev_cma		*fbdev;
 };
 
 int mxsfb_setup_crtc(struct drm_device *dev);
-- 
2.15.1

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[PATCH v2 5/9] drm/rcar-du: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

The CMA helper is already using the drm_fb_helper_generic_probe part of
the generic fbdev emulation. This patch makes full use of the generic
fbdev emulation by using its drm_client callbacks. This means that
drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
now handled by the emulation code. Additionally fbdev unregister happens
automatically on drm_dev_unregister().

The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
driver. This is done to highlight the fact that fbdev emulation is an
internal client that makes use of the driver, it is not part of the
driver as such. If fbdev setup fails, an error is printed, but the driver
succeeds probing.

drm_fbdev_generic_setup() handles mode_config.num_connector being zero.
In that case it retries fbdev setup on the next .output_poll_changed.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---

Changes since version 1:
- Rebased on: drm/rcar-du: Convert drm_atomic_helper_suspend/resume()

Laurent, do you want to take this through your tree, or do you want me to
apply it to drm-misc-next?

 drivers/gpu/drm/rcar-du/rcar_du_drv.c | 15 ++++-----------
 drivers/gpu/drm/rcar-du/rcar_du_drv.h |  2 --
 drivers/gpu/drm/rcar-du/rcar_du_kms.c | 21 ---------------------
 3 files changed, 4 insertions(+), 34 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 7015974c247a..27bfccd5b136 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -21,7 +21,9 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
 #include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_modeset_helper.h>
 
 #include "rcar_du_drv.h"
 #include "rcar_du_kms.h"
@@ -363,19 +365,11 @@ MODULE_DEVICE_TABLE(of, rcar_du_of_table);
  * DRM operations
  */
 
-static void rcar_du_lastclose(struct drm_device *dev)
-{
-	struct rcar_du_device *rcdu = dev->dev_private;
-
-	drm_fbdev_cma_restore_mode(rcdu->fbdev);
-}
-
 DEFINE_DRM_GEM_CMA_FOPS(rcar_du_fops);
 
 static struct drm_driver rcar_du_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
 				| DRIVER_ATOMIC,
-	.lastclose		= rcar_du_lastclose,
 	.gem_free_object_unlocked = drm_gem_cma_free_object,
 	.gem_vm_ops		= &drm_gem_cma_vm_ops,
 	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
@@ -431,9 +425,6 @@ static int rcar_du_remove(struct platform_device *pdev)
 
 	drm_dev_unregister(ddev);
 
-	if (rcdu->fbdev)
-		drm_fbdev_cma_fini(rcdu->fbdev);
-
 	drm_kms_helper_poll_fini(ddev);
 	drm_mode_config_cleanup(ddev);
 
@@ -493,6 +484,8 @@ static int rcar_du_probe(struct platform_device *pdev)
 
 	DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
 
+	drm_fbdev_generic_setup(ddev, 32);
+
 	return 0;
 
 error:
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index 9f5563296c5a..a68da79b424e 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -20,7 +20,6 @@
 struct clk;
 struct device;
 struct drm_device;
-struct drm_fbdev_cma;
 struct rcar_du_device;
 
 #define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK	BIT(0)	/* Per-CRTC IRQ and clock */
@@ -78,7 +77,6 @@ struct rcar_du_device {
 	void __iomem *mmio;
 
 	struct drm_device *ddev;
-	struct drm_fbdev_cma *fbdev;
 
 	struct rcar_du_crtc crtcs[RCAR_DU_MAX_CRTCS];
 	unsigned int num_crtcs;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 4ebd61ecbee1..6562871aa706 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -255,13 +255,6 @@ rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv,
 	return drm_gem_fb_create(dev, file_priv, mode_cmd);
 }
 
-static void rcar_du_output_poll_changed(struct drm_device *dev)
-{
-	struct rcar_du_device *rcdu = dev->dev_private;
-
-	drm_fbdev_cma_hotplug_event(rcdu->fbdev);
-}
-
 /* -----------------------------------------------------------------------------
  * Atomic Check and Update
  */
@@ -308,7 +301,6 @@ static const struct drm_mode_config_helper_funcs rcar_du_mode_config_helper = {
 
 static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = {
 	.fb_create = rcar_du_fb_create,
-	.output_poll_changed = rcar_du_output_poll_changed,
 	.atomic_check = rcar_du_atomic_check,
 	.atomic_commit = drm_atomic_helper_commit,
 };
@@ -543,7 +535,6 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 
 	struct drm_device *dev = rcdu->ddev;
 	struct drm_encoder *encoder;
-	struct drm_fbdev_cma *fbdev;
 	unsigned int dpad0_sources;
 	unsigned int num_encoders;
 	unsigned int num_groups;
@@ -682,17 +673,5 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 
 	drm_kms_helper_poll_init(dev);
 
-	if (dev->mode_config.num_connector) {
-		fbdev = drm_fbdev_cma_init(dev, 32,
-					   dev->mode_config.num_connector);
-		if (IS_ERR(fbdev))
-			return PTR_ERR(fbdev);
-
-		rcdu->fbdev = fbdev;
-	} else {
-		dev_info(rcdu->dev,
-			 "no connector found, disabling fbdev emulation\n");
-	}
-
 	return 0;
 }
-- 
2.15.1

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[PATCH v2 6/9] drm/atmel-hlcdc: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

The CMA helper is already using the drm_fb_helper_generic_probe part of
the generic fbdev emulation. This patch makes full use of the generic
fbdev emulation by using its drm_client callbacks. This means that
drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
now handled by the emulation code. Additionally fbdev unregister happens
automatically on drm_dev_unregister().

The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
driver. This is done to highlight the fact that fbdev emulation is an
internal client that makes use of the driver, it is not part of the
driver as such. If fbdev setup fails, an error is printed, but the driver
succeeds probing.

Cc: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
---
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
index fedbfa333bb0..034a91112098 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
@@ -556,7 +556,6 @@ static int atmel_hlcdc_dc_atomic_commit(struct drm_device *dev,
 
 static const struct drm_mode_config_funcs mode_config_funcs = {
 	.fb_create = atmel_hlcdc_fb_create,
-	.output_poll_changed = drm_fb_helper_output_poll_changed,
 	.atomic_check = drm_atomic_helper_check,
 	.atomic_commit = atmel_hlcdc_dc_atomic_commit,
 };
@@ -658,8 +657,6 @@ static int atmel_hlcdc_dc_load(struct drm_device *dev)
 
 	platform_set_drvdata(pdev, dev);
 
-	drm_fb_cma_fbdev_init(dev, 24, 0);
-
 	drm_kms_helper_poll_init(dev);
 
 	return 0;
@@ -678,7 +675,6 @@ static void atmel_hlcdc_dc_unload(struct drm_device *dev)
 {
 	struct atmel_hlcdc_dc *dc = dev->dev_private;
 
-	drm_fb_cma_fbdev_fini(dev);
 	flush_workqueue(dc->wq);
 	drm_kms_helper_poll_fini(dev);
 	drm_atomic_helper_shutdown(dev);
@@ -727,7 +723,6 @@ static struct drm_driver atmel_hlcdc_dc_driver = {
 	.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM |
 			   DRIVER_MODESET | DRIVER_PRIME |
 			   DRIVER_ATOMIC,
-	.lastclose = drm_fb_helper_lastclose,
 	.irq_handler = atmel_hlcdc_dc_irq_handler,
 	.irq_preinstall = atmel_hlcdc_dc_irq_uninstall,
 	.irq_postinstall = atmel_hlcdc_dc_irq_postinstall,
@@ -769,6 +764,8 @@ static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_unload;
 
+	drm_fbdev_generic_setup(ddev, 24);
+
 	return 0;
 
 err_unload:
-- 
2.15.1

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[PATCH v2 7/9] drm/sun4i: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

The CMA helper is already using the drm_fb_helper_generic_probe part of
the generic fbdev emulation. This patch makes full use of the generic
fbdev emulation by using its drm_client callbacks. This means that
drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
now handled by the emulation code. Additionally fbdev unregister happens
automatically on drm_dev_unregister().

The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
driver. This is done to highlight the fact that fbdev emulation is an
internal client that makes use of the driver, it is not part of the
driver as such. If fbdev setup fails, an error is printed, but the driver
succeeds probing.

Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
---
 drivers/gpu/drm/sun4i/sun4i_drv.c         | 12 +++---------
 drivers/gpu/drm/sun4i/sun4i_framebuffer.c | 12 +-----------
 drivers/gpu/drm/sun4i/sun4i_framebuffer.h |  3 +--
 3 files changed, 5 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index 1e41c3f5fd6d..ef773d36baf0 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -34,7 +34,6 @@ static struct drm_driver sun4i_drv_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC,
 
 	/* Generic Operations */
-	.lastclose		= drm_fb_helper_lastclose,
 	.fops			= &sun4i_drv_fops,
 	.name			= "sun4i-drm",
 	.desc			= "Allwinner sun4i Display Engine",
@@ -105,12 +104,7 @@ static int sun4i_drv_bind(struct device *dev)
 	/* Remove early framebuffers (ie. simplefb) */
 	drm_fb_helper_remove_conflicting_framebuffers(NULL, "sun4i-drm-fb", false);
 
-	/* Create our framebuffer */
-	ret = sun4i_framebuffer_init(drm);
-	if (ret) {
-		dev_err(drm->dev, "Couldn't create our framebuffer\n");
-		goto cleanup_mode_config;
-	}
+	sun4i_framebuffer_init(drm);
 
 	/* Enable connectors polling */
 	drm_kms_helper_poll_init(drm);
@@ -119,11 +113,12 @@ static int sun4i_drv_bind(struct device *dev)
 	if (ret)
 		goto finish_poll;
 
+	drm_fbdev_generic_setup(drm, 32);
+
 	return 0;
 
 finish_poll:
 	drm_kms_helper_poll_fini(drm);
-	sun4i_framebuffer_free(drm);
 cleanup_mode_config:
 	drm_mode_config_cleanup(drm);
 	of_reserved_mem_device_release(dev);
@@ -138,7 +133,6 @@ static void sun4i_drv_unbind(struct device *dev)
 
 	drm_dev_unregister(drm);
 	drm_kms_helper_poll_fini(drm);
-	sun4i_framebuffer_free(drm);
 	drm_mode_config_cleanup(drm);
 	of_reserved_mem_device_release(dev);
 	drm_dev_put(drm);
diff --git a/drivers/gpu/drm/sun4i/sun4i_framebuffer.c b/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
index 5f29850ef8ac..cb828028ae06 100644
--- a/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
+++ b/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
@@ -12,8 +12,6 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drmP.h>
 
@@ -37,7 +35,6 @@ static int sun4i_de_atomic_check(struct drm_device *dev,
 }
 
 static const struct drm_mode_config_funcs sun4i_de_mode_config_funcs = {
-	.output_poll_changed	= drm_fb_helper_output_poll_changed,
 	.atomic_check		= sun4i_de_atomic_check,
 	.atomic_commit		= drm_atomic_helper_commit,
 	.fb_create		= drm_gem_fb_create,
@@ -47,7 +44,7 @@ static struct drm_mode_config_helper_funcs sun4i_de_mode_config_helpers = {
 	.atomic_commit_tail	= drm_atomic_helper_commit_tail_rpm,
 };
 
-int sun4i_framebuffer_init(struct drm_device *drm)
+void sun4i_framebuffer_init(struct drm_device *drm)
 {
 	drm_mode_config_reset(drm);
 
@@ -56,11 +53,4 @@ int sun4i_framebuffer_init(struct drm_device *drm)
 
 	drm->mode_config.funcs = &sun4i_de_mode_config_funcs;
 	drm->mode_config.helper_private = &sun4i_de_mode_config_helpers;
-
-	return drm_fb_cma_fbdev_init(drm, 32, 0);
-}
-
-void sun4i_framebuffer_free(struct drm_device *drm)
-{
-	drm_fb_cma_fbdev_fini(drm);
 }
diff --git a/drivers/gpu/drm/sun4i/sun4i_framebuffer.h b/drivers/gpu/drm/sun4i/sun4i_framebuffer.h
index 7ef0aed8384c..6fe5bd8c4026 100644
--- a/drivers/gpu/drm/sun4i/sun4i_framebuffer.h
+++ b/drivers/gpu/drm/sun4i/sun4i_framebuffer.h
@@ -13,7 +13,6 @@
 #ifndef _SUN4I_FRAMEBUFFER_H_
 #define _SUN4I_FRAMEBUFFER_H_
 
-int sun4i_framebuffer_init(struct drm_device *drm);
-void sun4i_framebuffer_free(struct drm_device *drm);
+void sun4i_framebuffer_init(struct drm_device *drm);
 
 #endif /* _SUN4I_FRAMEBUFFER_H_ */
-- 
2.15.1

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[PATCH v2 8/9] drm/tilcdc: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

The CMA helper is already using the drm_fb_helper_generic_probe part of
the generic fbdev emulation. This patch makes full use of the generic
fbdev emulation by using its drm_client callbacks. This means that
drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
now handled by the emulation code. Additionally fbdev unregister happens
automatically on drm_dev_unregister().

The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
driver. This is done to highlight the fact that fbdev emulation is an
internal client that makes use of the driver, it is not part of the
driver as such. If fbdev setup fails, an error is printed, but the driver
succeeds probing.

Cc: Jyri Sarha <jsarha@ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
---
 drivers/gpu/drm/tilcdc/tilcdc_drv.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
index 33e533268488..3dac08b24140 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -140,7 +140,6 @@ static int tilcdc_commit(struct drm_device *dev,
 
 static const struct drm_mode_config_funcs mode_config_funcs = {
 	.fb_create = tilcdc_fb_create,
-	.output_poll_changed = drm_fb_helper_output_poll_changed,
 	.atomic_check = tilcdc_atomic_check,
 	.atomic_commit = tilcdc_commit,
 };
@@ -191,9 +190,6 @@ static void tilcdc_fini(struct drm_device *dev)
 		drm_dev_unregister(dev);
 
 	drm_kms_helper_poll_fini(dev);
-
-	drm_fb_cma_fbdev_fini(dev);
-
 	drm_irq_uninstall(dev);
 	drm_mode_config_cleanup(dev);
 	tilcdc_remove_external_device(dev);
@@ -396,16 +392,14 @@ static int tilcdc_init(struct drm_driver *ddrv, struct device *dev)
 
 	drm_mode_config_reset(ddev);
 
-	ret = drm_fb_cma_fbdev_init(ddev, bpp, 0);
-	if (ret)
-		goto init_failed;
-
 	drm_kms_helper_poll_init(ddev);
 
 	ret = drm_dev_register(ddev, 0);
 	if (ret)
 		goto init_failed;
 
+	drm_fbdev_generic_setup(ddev, bpp);
+
 	priv->is_registered = true;
 	return 0;
 
@@ -519,7 +513,6 @@ DEFINE_DRM_GEM_CMA_FOPS(fops);
 static struct drm_driver tilcdc_driver = {
 	.driver_features    = (DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET |
 			       DRIVER_PRIME | DRIVER_ATOMIC),
-	.lastclose          = drm_fb_helper_lastclose,
 	.irq_handler        = tilcdc_irq,
 	.gem_free_object_unlocked = drm_gem_cma_free_object,
 	.gem_print_info     = drm_gem_cma_print_info,
-- 
2.15.1

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[PATCH v2 9/9] drm/cma-helper: Remove unused fbdev code

[Noralf Trønnes]

CMA helper drivers have been converted to drm_fbdev_generic_setup()
so the fbdev code can be removed.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
---

Changes since version 1:
- Rebased

 drivers/gpu/drm/Kconfig             |   4 --
 drivers/gpu/drm/drm_fb_cma_helper.c | 130 ------------------------------------
 include/drm/drm_fb_cma_helper.h     |  22 ------
 3 files changed, 156 deletions(-)

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 4385f00e1d05..bd943a71756c 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -170,10 +170,6 @@ config DRM_KMS_CMA_HELPER
 	bool
 	depends on DRM
 	select DRM_GEM_CMA_HELPER
-	select DRM_KMS_FB_HELPER
-	select FB_SYS_FILLRECT
-	select FB_SYS_COPYAREA
-	select FB_SYS_IMAGEBLIT
 	help
 	  Choose this if you need the KMS CMA helper functions
 
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index fc2b42dd3dc6..0ddf9c65e5ab 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -18,8 +18,6 @@
  */
 
 #include <drm/drmP.h>
-#include <drm/drm_client.h>
-#include <drm/drm_fb_helper.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
@@ -27,10 +25,6 @@
 #include <drm/drm_print.h>
 #include <linux/module.h>
 
-struct drm_fbdev_cma {
-	struct drm_fb_helper	fb_helper;
-};
-
 /**
  * DOC: framebuffer cma helper functions
  *
@@ -39,16 +33,8 @@ struct drm_fbdev_cma {
  *
  * drm_gem_fb_create() is used in the &drm_mode_config_funcs.fb_create
  * callback function to create a cma backed framebuffer.
- *
- * An fbdev framebuffer backed by cma is also available by calling
- * drm_fb_cma_fbdev_init(). drm_fb_cma_fbdev_fini() tears it down.
  */
 
-static inline struct drm_fbdev_cma *to_fbdev_cma(struct drm_fb_helper *helper)
-{
-	return container_of(helper, struct drm_fbdev_cma, fb_helper);
-}
-
 /**
  * drm_fb_cma_get_gem_obj() - Get CMA GEM object for framebuffer
  * @fb: The framebuffer
@@ -105,119 +91,3 @@ dma_addr_t drm_fb_cma_get_gem_addr(struct drm_framebuffer *fb,
 	return paddr;
 }
 EXPORT_SYMBOL_GPL(drm_fb_cma_get_gem_addr);
-
-/**
- * drm_fb_cma_fbdev_init() - Allocate and initialize fbdev emulation
- * @dev: DRM device
- * @preferred_bpp: Preferred bits per pixel for the device.
- *                 @dev->mode_config.preferred_depth is used if this is zero.
- * @max_conn_count: Maximum number of connectors.
- *                  @dev->mode_config.num_connector is used if this is zero.
- *
- * Returns:
- * Zero on success or negative error code on failure.
- */
-int drm_fb_cma_fbdev_init(struct drm_device *dev, unsigned int preferred_bpp,
-			  unsigned int max_conn_count)
-{
-	struct drm_fbdev_cma *fbdev_cma;
-
-	/* dev->fb_helper will indirectly point to fbdev_cma after this call */
-	fbdev_cma = drm_fbdev_cma_init(dev, preferred_bpp, max_conn_count);
-	return PTR_ERR_OR_ZERO(fbdev_cma);
-}
-EXPORT_SYMBOL_GPL(drm_fb_cma_fbdev_init);
-
-/**
- * drm_fb_cma_fbdev_fini() - Teardown fbdev emulation
- * @dev: DRM device
- */
-void drm_fb_cma_fbdev_fini(struct drm_device *dev)
-{
-	if (dev->fb_helper)
-		drm_fbdev_cma_fini(to_fbdev_cma(dev->fb_helper));
-}
-EXPORT_SYMBOL_GPL(drm_fb_cma_fbdev_fini);
-
-static const struct drm_fb_helper_funcs drm_fb_cma_helper_funcs = {
-	.fb_probe = drm_fb_helper_generic_probe,
-};
-
-/**
- * drm_fbdev_cma_init() - Allocate and initializes a drm_fbdev_cma struct
- * @dev: DRM device
- * @preferred_bpp: Preferred bits per pixel for the device
- * @max_conn_count: Maximum number of connectors
- *
- * Returns a newly allocated drm_fbdev_cma struct or a ERR_PTR.
- */
-struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev,
-	unsigned int preferred_bpp, unsigned int max_conn_count)
-{
-	struct drm_fbdev_cma *fbdev_cma;
-	struct drm_fb_helper *fb_helper;
-	int ret;
-
-	fbdev_cma = kzalloc(sizeof(*fbdev_cma), GFP_KERNEL);
-	if (!fbdev_cma)
-		return ERR_PTR(-ENOMEM);
-
-	fb_helper = &fbdev_cma->fb_helper;
-
-	ret = drm_client_new(dev, &fb_helper->client, "fbdev", NULL);
-	if (ret)
-		goto err_free;
-
-	ret = drm_fb_helper_fbdev_setup(dev, fb_helper, &drm_fb_cma_helper_funcs,
-					preferred_bpp, max_conn_count);
-	if (ret)
-		goto err_client_put;
-
-	return fbdev_cma;
-
-err_client_put:
-	drm_client_release(&fb_helper->client);
-err_free:
-	kfree(fbdev_cma);
-
-	return ERR_PTR(ret);
-}
-EXPORT_SYMBOL_GPL(drm_fbdev_cma_init);
-
-/**
- * drm_fbdev_cma_fini() - Free drm_fbdev_cma struct
- * @fbdev_cma: The drm_fbdev_cma struct
- */
-void drm_fbdev_cma_fini(struct drm_fbdev_cma *fbdev_cma)
-{
-	drm_fb_helper_unregister_fbi(&fbdev_cma->fb_helper);
-	/* All resources have now been freed by drm_fbdev_fb_destroy() */
-}
-EXPORT_SYMBOL_GPL(drm_fbdev_cma_fini);
-
-/**
- * drm_fbdev_cma_restore_mode() - Restores initial framebuffer mode
- * @fbdev_cma: The drm_fbdev_cma struct, may be NULL
- *
- * This function is usually called from the &drm_driver.lastclose callback.
- */
-void drm_fbdev_cma_restore_mode(struct drm_fbdev_cma *fbdev_cma)
-{
-	if (fbdev_cma)
-		drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev_cma->fb_helper);
-}
-EXPORT_SYMBOL_GPL(drm_fbdev_cma_restore_mode);
-
-/**
- * drm_fbdev_cma_hotplug_event() - Poll for hotpulug events
- * @fbdev_cma: The drm_fbdev_cma struct, may be NULL
- *
- * This function is usually called from the &drm_mode_config.output_poll_changed
- * callback.
- */
-void drm_fbdev_cma_hotplug_event(struct drm_fbdev_cma *fbdev_cma)
-{
-	if (fbdev_cma)
-		drm_fb_helper_hotplug_event(&fbdev_cma->fb_helper);
-}
-EXPORT_SYMBOL_GPL(drm_fbdev_cma_hotplug_event);
diff --git a/include/drm/drm_fb_cma_helper.h b/include/drm/drm_fb_cma_helper.h
index 8dbbe1eece1b..4becb09975a4 100644
--- a/include/drm/drm_fb_cma_helper.h
+++ b/include/drm/drm_fb_cma_helper.h
@@ -2,31 +2,9 @@
 #ifndef __DRM_FB_CMA_HELPER_H__
 #define __DRM_FB_CMA_HELPER_H__
 
-struct drm_fbdev_cma;
-struct drm_gem_cma_object;
-
-struct drm_fb_helper_surface_size;
-struct drm_framebuffer_funcs;
-struct drm_fb_helper_funcs;
 struct drm_framebuffer;
-struct drm_fb_helper;
-struct drm_device;
-struct drm_file;
-struct drm_mode_fb_cmd2;
-struct drm_plane;
 struct drm_plane_state;
 
-int drm_fb_cma_fbdev_init(struct drm_device *dev, unsigned int preferred_bpp,
-			  unsigned int max_conn_count);
-void drm_fb_cma_fbdev_fini(struct drm_device *dev);
-
-struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev,
-	unsigned int preferred_bpp, unsigned int max_conn_count);
-void drm_fbdev_cma_fini(struct drm_fbdev_cma *fbdev_cma);
-
-void drm_fbdev_cma_restore_mode(struct drm_fbdev_cma *fbdev_cma);
-void drm_fbdev_cma_hotplug_event(struct drm_fbdev_cma *fbdev_cma);
-
 struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb,
 	unsigned int plane);
 
-- 
2.15.1

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Re: [PATCH v2 6/9] drm/atmel-hlcdc: Use drm_fbdev_generic_setup()

[Boris Brezillon]

On Thu, 25 Oct 2018 22:13:37 +0200
Noralf Trønnes <noralf@tronnes.org> wrote:

> The CMA helper is already using the drm_fb_helper_generic_probe part of
> the generic fbdev emulation. This patch makes full use of the generic
> fbdev emulation by using its drm_client callbacks. This means that
> drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
> now handled by the emulation code. Additionally fbdev unregister happens
> automatically on drm_dev_unregister().
> 
> The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
> driver. This is done to highlight the fact that fbdev emulation is an
> internal client that makes use of the driver, it is not part of the
> driver as such. If fbdev setup fails, an error is printed, but the driver
> succeeds probing.
> 
> Cc: Boris Brezillon <boris.brezillon@bootlin.com>
> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
> Acked-by: Sam Ravnborg <sam@ravnborg.org>

Acked-by: Boris Brezillon <boris.brezillon@bootlin.com>

> ---
>  drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> index fedbfa333bb0..034a91112098 100644
> --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> @@ -556,7 +556,6 @@ static int atmel_hlcdc_dc_atomic_commit(struct drm_device *dev,
>  
>  static const struct drm_mode_config_funcs mode_config_funcs = {
>  	.fb_create = atmel_hlcdc_fb_create,
> -	.output_poll_changed = drm_fb_helper_output_poll_changed,
>  	.atomic_check = drm_atomic_helper_check,
>  	.atomic_commit = atmel_hlcdc_dc_atomic_commit,
>  };
> @@ -658,8 +657,6 @@ static int atmel_hlcdc_dc_load(struct drm_device *dev)
>  
>  	platform_set_drvdata(pdev, dev);
>  
> -	drm_fb_cma_fbdev_init(dev, 24, 0);
> -
>  	drm_kms_helper_poll_init(dev);
>  
>  	return 0;
> @@ -678,7 +675,6 @@ static void atmel_hlcdc_dc_unload(struct drm_device *dev)
>  {
>  	struct atmel_hlcdc_dc *dc = dev->dev_private;
>  
> -	drm_fb_cma_fbdev_fini(dev);
>  	flush_workqueue(dc->wq);
>  	drm_kms_helper_poll_fini(dev);
>  	drm_atomic_helper_shutdown(dev);
> @@ -727,7 +723,6 @@ static struct drm_driver atmel_hlcdc_dc_driver = {
>  	.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM |
>  			   DRIVER_MODESET | DRIVER_PRIME |
>  			   DRIVER_ATOMIC,
> -	.lastclose = drm_fb_helper_lastclose,
>  	.irq_handler = atmel_hlcdc_dc_irq_handler,
>  	.irq_preinstall = atmel_hlcdc_dc_irq_uninstall,
>  	.irq_postinstall = atmel_hlcdc_dc_irq_postinstall,
> @@ -769,6 +764,8 @@ static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto err_unload;
>  
> +	drm_fbdev_generic_setup(ddev, 24);
> +
>  	return 0;
>  
>  err_unload:

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Re: [PATCH v2 7/9] drm/sun4i: Use drm_fbdev_generic_setup()

[Maxime Ripard]

On Thu, Oct 25, 2018 at 10:13:38PM +0200, Noralf Trønnes wrote:
> The CMA helper is already using the drm_fb_helper_generic_probe part of
> the generic fbdev emulation. This patch makes full use of the generic
> fbdev emulation by using its drm_client callbacks. This means that
> drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
> now handled by the emulation code. Additionally fbdev unregister happens
> automatically on drm_dev_unregister().
> 
> The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
> driver. This is done to highlight the fact that fbdev emulation is an
> internal client that makes use of the driver, it is not part of the
> driver as such. If fbdev setup fails, an error is printed, but the driver
> succeeds probing.
> 
> Cc: Maxime Ripard <maxime.ripard@bootlin.com>
> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
> Acked-by: Sam Ravnborg <sam@ravnborg.org>

Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>

Maxime

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Re: [PATCH v2 8/9] drm/tilcdc: Use drm_fbdev_generic_setup()

[Jyri Sarha]

On 25/10/18 23:13, Noralf Trønnes wrote:
> The CMA helper is already using the drm_fb_helper_generic_probe part of
> the generic fbdev emulation. This patch makes full use of the generic
> fbdev emulation by using its drm_client callbacks. This means that
> drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
> now handled by the emulation code. Additionally fbdev unregister happens
> automatically on drm_dev_unregister().
> 
> The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
> driver. This is done to highlight the fact that fbdev emulation is an
> internal client that makes use of the driver, it is not part of the
> driver as such. If fbdev setup fails, an error is printed, but the driver
> succeeds probing.
> 
> Cc: Jyri Sarha <jsarha@ti.com>
> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
> Acked-by: Sam Ravnborg <sam@ravnborg.org>

Thanks!

Acked-by: Jyri Sarha <jsarha@ti.com>

> ---
>  drivers/gpu/drm/tilcdc/tilcdc_drv.c | 11 ++---------
>  1 file changed, 2 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
> index 33e533268488..3dac08b24140 100644
> --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
> +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
> @@ -140,7 +140,6 @@ static int tilcdc_commit(struct drm_device *dev,
>  
>  static const struct drm_mode_config_funcs mode_config_funcs = {
>  	.fb_create = tilcdc_fb_create,
> -	.output_poll_changed = drm_fb_helper_output_poll_changed,
>  	.atomic_check = tilcdc_atomic_check,
>  	.atomic_commit = tilcdc_commit,
>  };
> @@ -191,9 +190,6 @@ static void tilcdc_fini(struct drm_device *dev)
>  		drm_dev_unregister(dev);
>  
>  	drm_kms_helper_poll_fini(dev);
> -
> -	drm_fb_cma_fbdev_fini(dev);
> -
>  	drm_irq_uninstall(dev);
>  	drm_mode_config_cleanup(dev);
>  	tilcdc_remove_external_device(dev);
> @@ -396,16 +392,14 @@ static int tilcdc_init(struct drm_driver *ddrv, struct device *dev)
>  
>  	drm_mode_config_reset(ddev);
>  
> -	ret = drm_fb_cma_fbdev_init(ddev, bpp, 0);
> -	if (ret)
> -		goto init_failed;
> -
>  	drm_kms_helper_poll_init(ddev);
>  
>  	ret = drm_dev_register(ddev, 0);
>  	if (ret)
>  		goto init_failed;
>  
> +	drm_fbdev_generic_setup(ddev, bpp);
> +
>  	priv->is_registered = true;
>  	return 0;
>  
> @@ -519,7 +513,6 @@ DEFINE_DRM_GEM_CMA_FOPS(fops);
>  static struct drm_driver tilcdc_driver = {
>  	.driver_features    = (DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET |
>  			       DRIVER_PRIME | DRIVER_ATOMIC),
> -	.lastclose          = drm_fb_helper_lastclose,
>  	.irq_handler        = tilcdc_irq,
>  	.gem_free_object_unlocked = drm_gem_cma_free_object,
>  	.gem_print_info     = drm_gem_cma_print_info,
> 


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Re: [PATCH v2 1/9] drm/arc: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

Den 25.10.2018 22.13, skrev Noralf Trønnes:
> The CMA helper is already using the drm_fb_helper_generic_probe part of
> the generic fbdev emulation. This patch makes full use of the generic
> fbdev emulation by using its drm_client callbacks. This means that
> drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
> now handled by the emulation code. Additionally fbdev unregister happens
> automatically on drm_dev_unregister().
>
> The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
> driver. This is done to highlight the fact that fbdev emulation is an
> internal client that makes use of the driver, it is not part of the
> driver as such. If fbdev setup fails, an error is printed, but the driver
> succeeds probing.
>
> Cc: Alexey Brodkin <abrodkin@synopsys.com>
> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
> Acked-by: Sam Ravnborg <sam@ravnborg.org>
> Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
> ---

Applied to drm-misc-next.

Noralf.

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Re: [PATCH v2 2/9] drm/fsl-dcu: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

Den 25.10.2018 22.13, skrev Noralf Trønnes:
> The CMA helper is already using the drm_fb_helper_generic_probe part of
> the generic fbdev emulation. This patch makes full use of the generic
> fbdev emulation by using its drm_client callbacks. This means that
> drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
> now handled by the emulation code. Additionally fbdev unregister happens
> automatically on drm_dev_unregister().
>
> The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
> driver. This is done to highlight the fact that fbdev emulation is an
> internal client that makes use of the driver, it is not part of the
> driver as such. If fbdev setup fails, an error is printed, but the driver
> succeeds probing.
>
> Cc: Stefan Agner <stefan@agner.ch>
> Cc: Alison Wang <alison.wang@nxp.com>
> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
> Acked-by: Sam Ravnborg <sam@ravnborg.org>
> Acked-by: Stefan Agner <stefan@agner.ch>
> ---
>

Applied to drm-misc-next.

Noralf.

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Re: [PATCH v2 6/9] drm/atmel-hlcdc: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

Den 25.10.2018 22.25, skrev Boris Brezillon:
> On Thu, 25 Oct 2018 22:13:37 +0200
> Noralf Trønnes <noralf@tronnes.org> wrote:
>
>> The CMA helper is already using the drm_fb_helper_generic_probe part of
>> the generic fbdev emulation. This patch makes full use of the generic
>> fbdev emulation by using its drm_client callbacks. This means that
>> drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
>> now handled by the emulation code. Additionally fbdev unregister happens
>> automatically on drm_dev_unregister().
>>
>> The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
>> driver. This is done to highlight the fact that fbdev emulation is an
>> internal client that makes use of the driver, it is not part of the
>> driver as such. If fbdev setup fails, an error is printed, but the driver
>> succeeds probing.
>>
>> Cc: Boris Brezillon <boris.brezillon@bootlin.com>
>> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
>> Acked-by: Sam Ravnborg <sam@ravnborg.org>
> Acked-by: Boris Brezillon <boris.brezillon@bootlin.com>

Applied to drm-misc-next.

Noralf.

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Re: [PATCH v2 7/9] drm/sun4i: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

Den 26.10.2018 10.27, skrev Maxime Ripard:
> On Thu, Oct 25, 2018 at 10:13:38PM +0200, Noralf Trønnes wrote:
>> The CMA helper is already using the drm_fb_helper_generic_probe part of
>> the generic fbdev emulation. This patch makes full use of the generic
>> fbdev emulation by using its drm_client callbacks. This means that
>> drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
>> now handled by the emulation code. Additionally fbdev unregister happens
>> automatically on drm_dev_unregister().
>>
>> The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
>> driver. This is done to highlight the fact that fbdev emulation is an
>> internal client that makes use of the driver, it is not part of the
>> driver as such. If fbdev setup fails, an error is printed, but the driver
>> succeeds probing.
>>
>> Cc: Maxime Ripard <maxime.ripard@bootlin.com>
>> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
>> Acked-by: Sam Ravnborg <sam@ravnborg.org>
> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>

Applied to drm-misc-next.

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Re: [PATCH v2 8/9] drm/tilcdc: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

Den 29.10.2018 16.55, skrev Jyri Sarha:
> On 25/10/18 23:13, Noralf Trønnes wrote:
>> The CMA helper is already using the drm_fb_helper_generic_probe part of
>> the generic fbdev emulation. This patch makes full use of the generic
>> fbdev emulation by using its drm_client callbacks. This means that
>> drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
>> now handled by the emulation code. Additionally fbdev unregister happens
>> automatically on drm_dev_unregister().
>>
>> The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
>> driver. This is done to highlight the fact that fbdev emulation is an
>> internal client that makes use of the driver, it is not part of the
>> driver as such. If fbdev setup fails, an error is printed, but the driver
>> succeeds probing.
>>
>> Cc: Jyri Sarha <jsarha@ti.com>
>> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
>> Acked-by: Sam Ravnborg <sam@ravnborg.org>
> Thanks!
>
> Acked-by: Jyri Sarha <jsarha@ti.com>

Applied to drm-misc-next.

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Re: [PATCH v2 5/9] drm/rcar-du: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

Laurent,

Den 25.10.2018 22.13, skrev Noralf Trønnes:
> The CMA helper is already using the drm_fb_helper_generic_probe part of
> the generic fbdev emulation. This patch makes full use of the generic
> fbdev emulation by using its drm_client callbacks. This means that
> drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
> now handled by the emulation code. Additionally fbdev unregister happens
> automatically on drm_dev_unregister().
>
> The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
> driver. This is done to highlight the fact that fbdev emulation is an
> internal client that makes use of the driver, it is not part of the
> driver as such. If fbdev setup fails, an error is printed, but the driver
> succeeds probing.
>
> drm_fbdev_generic_setup() handles mode_config.num_connector being zero.
> In that case it retries fbdev setup on the next .output_poll_changed.
>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
> Acked-by: Sam Ravnborg <sam@ravnborg.org>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
>
> Changes since version 1:
> - Rebased on: drm/rcar-du: Convert drm_atomic_helper_suspend/resume()
>
> Laurent, do you want to take this through your tree, or do you want me to
> apply it to drm-misc-next?


I forgot about this one.
I'll apply it to drm-misc-next in a week unless I hear otherwise.

Noralf.

>   drivers/gpu/drm/rcar-du/rcar_du_drv.c | 15 ++++-----------
>   drivers/gpu/drm/rcar-du/rcar_du_drv.h |  2 --
>   drivers/gpu/drm/rcar-du/rcar_du_kms.c | 21 ---------------------
>   3 files changed, 4 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> index 7015974c247a..27bfccd5b136 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> @@ -21,7 +21,9 @@
>   #include <drm/drm_atomic_helper.h>
>   #include <drm/drm_crtc_helper.h>
>   #include <drm/drm_fb_cma_helper.h>
> +#include <drm/drm_fb_helper.h>
>   #include <drm/drm_gem_cma_helper.h>
> +#include <drm/drm_modeset_helper.h>
>   
>   #include "rcar_du_drv.h"
>   #include "rcar_du_kms.h"
> @@ -363,19 +365,11 @@ MODULE_DEVICE_TABLE(of, rcar_du_of_table);
>    * DRM operations
>    */
>   
> -static void rcar_du_lastclose(struct drm_device *dev)
> -{
> -	struct rcar_du_device *rcdu = dev->dev_private;
> -
> -	drm_fbdev_cma_restore_mode(rcdu->fbdev);
> -}
> -
>   DEFINE_DRM_GEM_CMA_FOPS(rcar_du_fops);
>   
>   static struct drm_driver rcar_du_driver = {
>   	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
>   				| DRIVER_ATOMIC,
> -	.lastclose		= rcar_du_lastclose,
>   	.gem_free_object_unlocked = drm_gem_cma_free_object,
>   	.gem_vm_ops		= &drm_gem_cma_vm_ops,
>   	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
> @@ -431,9 +425,6 @@ static int rcar_du_remove(struct platform_device *pdev)
>   
>   	drm_dev_unregister(ddev);
>   
> -	if (rcdu->fbdev)
> -		drm_fbdev_cma_fini(rcdu->fbdev);
> -
>   	drm_kms_helper_poll_fini(ddev);
>   	drm_mode_config_cleanup(ddev);
>   
> @@ -493,6 +484,8 @@ static int rcar_du_probe(struct platform_device *pdev)
>   
>   	DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
>   
> +	drm_fbdev_generic_setup(ddev, 32);
> +
>   	return 0;
>   
>   error:
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> index 9f5563296c5a..a68da79b424e 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> @@ -20,7 +20,6 @@
>   struct clk;
>   struct device;
>   struct drm_device;
> -struct drm_fbdev_cma;
>   struct rcar_du_device;
>   
>   #define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK	BIT(0)	/* Per-CRTC IRQ and clock */
> @@ -78,7 +77,6 @@ struct rcar_du_device {
>   	void __iomem *mmio;
>   
>   	struct drm_device *ddev;
> -	struct drm_fbdev_cma *fbdev;
>   
>   	struct rcar_du_crtc crtcs[RCAR_DU_MAX_CRTCS];
>   	unsigned int num_crtcs;
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> index 4ebd61ecbee1..6562871aa706 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> @@ -255,13 +255,6 @@ rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv,
>   	return drm_gem_fb_create(dev, file_priv, mode_cmd);
>   }
>   
> -static void rcar_du_output_poll_changed(struct drm_device *dev)
> -{
> -	struct rcar_du_device *rcdu = dev->dev_private;
> -
> -	drm_fbdev_cma_hotplug_event(rcdu->fbdev);
> -}
> -
>   /* -----------------------------------------------------------------------------
>    * Atomic Check and Update
>    */
> @@ -308,7 +301,6 @@ static const struct drm_mode_config_helper_funcs rcar_du_mode_config_helper = {
>   
>   static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = {
>   	.fb_create = rcar_du_fb_create,
> -	.output_poll_changed = rcar_du_output_poll_changed,
>   	.atomic_check = rcar_du_atomic_check,
>   	.atomic_commit = drm_atomic_helper_commit,
>   };
> @@ -543,7 +535,6 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
>   
>   	struct drm_device *dev = rcdu->ddev;
>   	struct drm_encoder *encoder;
> -	struct drm_fbdev_cma *fbdev;
>   	unsigned int dpad0_sources;
>   	unsigned int num_encoders;
>   	unsigned int num_groups;
> @@ -682,17 +673,5 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
>   
>   	drm_kms_helper_poll_init(dev);
>   
> -	if (dev->mode_config.num_connector) {
> -		fbdev = drm_fbdev_cma_init(dev, 32,
> -					   dev->mode_config.num_connector);
> -		if (IS_ERR(fbdev))
> -			return PTR_ERR(fbdev);
> -
> -		rcdu->fbdev = fbdev;
> -	} else {
> -		dev_info(rcdu->dev,
> -			 "no connector found, disabling fbdev emulation\n");
> -	}
> -
>   	return 0;
>   }
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Re: [PATCH v2 5/9] drm/rcar-du: Use drm_fbdev_generic_setup()

[Noralf Trønnes]

Den 25.10.2018 22.13, skrev Noralf Trønnes:
> The CMA helper is already using the drm_fb_helper_generic_probe part of
> the generic fbdev emulation. This patch makes full use of the generic
> fbdev emulation by using its drm_client callbacks. This means that
> drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
> now handled by the emulation code. Additionally fbdev unregister happens
> automatically on drm_dev_unregister().
>
> The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
> driver. This is done to highlight the fact that fbdev emulation is an
> internal client that makes use of the driver, it is not part of the
> driver as such. If fbdev setup fails, an error is printed, but the driver
> succeeds probing.
>
> drm_fbdev_generic_setup() handles mode_config.num_connector being zero.
> In that case it retries fbdev setup on the next .output_poll_changed.
>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
> Acked-by: Sam Ravnborg <sam@ravnborg.org>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
>
> Changes since version 1:
> - Rebased on: drm/rcar-du: Convert drm_atomic_helper_suspend/resume()
>
> Laurent, do you want to take this through your tree, or do you want me to
> apply it to drm-misc-next?
>
>   drivers/gpu/drm/rcar-du/rcar_du_drv.c | 15 ++++-----------
>   drivers/gpu/drm/rcar-du/rcar_du_drv.h |  2 --
>   drivers/gpu/drm/rcar-du/rcar_du_kms.c | 21 ---------------------
>   3 files changed, 4 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> index 7015974c247a..27bfccd5b136 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> @@ -21,7 +21,9 @@
>   #include <drm/drm_atomic_helper.h>
>   #include <drm/drm_crtc_helper.h>
>   #include <drm/drm_fb_cma_helper.h>
> +#include <drm/drm_fb_helper.h>
>   #include <drm/drm_gem_cma_helper.h>
> +#include <drm/drm_modeset_helper.h>


I see that I forgot to remove this include when rebasing.

Will send a new version together with the other remaining patches.


Noralf.


>   
>   #include "rcar_du_drv.h"
>   #include "rcar_du_kms.h"
> @@ -363,19 +365,11 @@ MODULE_DEVICE_TABLE(of, rcar_du_of_table);
>    * DRM operations
>    */
>   
> -static void rcar_du_lastclose(struct drm_device *dev)
> -{
> -	struct rcar_du_device *rcdu = dev->dev_private;
> -
> -	drm_fbdev_cma_restore_mode(rcdu->fbdev);
> -}
> -
>   DEFINE_DRM_GEM_CMA_FOPS(rcar_du_fops);
>   
>   static struct drm_driver rcar_du_driver = {
>   	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
>   				| DRIVER_ATOMIC,
> -	.lastclose		= rcar_du_lastclose,
>   	.gem_free_object_unlocked = drm_gem_cma_free_object,
>   	.gem_vm_ops		= &drm_gem_cma_vm_ops,
>   	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
> @@ -431,9 +425,6 @@ static int rcar_du_remove(struct platform_device *pdev)
>   
>   	drm_dev_unregister(ddev);
>   
> -	if (rcdu->fbdev)
> -		drm_fbdev_cma_fini(rcdu->fbdev);
> -
>   	drm_kms_helper_poll_fini(ddev);
>   	drm_mode_config_cleanup(ddev);
>   
> @@ -493,6 +484,8 @@ static int rcar_du_probe(struct platform_device *pdev)
>   
>   	DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
>   
> +	drm_fbdev_generic_setup(ddev, 32);
> +
>   	return 0;
>   
>   error:
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> index 9f5563296c5a..a68da79b424e 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> @@ -20,7 +20,6 @@
>   struct clk;
>   struct device;
>   struct drm_device;
> -struct drm_fbdev_cma;
>   struct rcar_du_device;
>   
>   #define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK	BIT(0)	/* Per-CRTC IRQ and clock */
> @@ -78,7 +77,6 @@ struct rcar_du_device {
>   	void __iomem *mmio;
>   
>   	struct drm_device *ddev;
> -	struct drm_fbdev_cma *fbdev;
>   
>   	struct rcar_du_crtc crtcs[RCAR_DU_MAX_CRTCS];
>   	unsigned int num_crtcs;
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> index 4ebd61ecbee1..6562871aa706 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> @@ -255,13 +255,6 @@ rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv,
>   	return drm_gem_fb_create(dev, file_priv, mode_cmd);
>   }
>   
> -static void rcar_du_output_poll_changed(struct drm_device *dev)
> -{
> -	struct rcar_du_device *rcdu = dev->dev_private;
> -
> -	drm_fbdev_cma_hotplug_event(rcdu->fbdev);
> -}
> -
>   /* -----------------------------------------------------------------------------
>    * Atomic Check and Update
>    */
> @@ -308,7 +301,6 @@ static const struct drm_mode_config_helper_funcs rcar_du_mode_config_helper = {
>   
>   static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = {
>   	.fb_create = rcar_du_fb_create,
> -	.output_poll_changed = rcar_du_output_poll_changed,
>   	.atomic_check = rcar_du_atomic_check,
>   	.atomic_commit = drm_atomic_helper_commit,
>   };
> @@ -543,7 +535,6 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
>   
>   	struct drm_device *dev = rcdu->ddev;
>   	struct drm_encoder *encoder;
> -	struct drm_fbdev_cma *fbdev;
>   	unsigned int dpad0_sources;
>   	unsigned int num_encoders;
>   	unsigned int num_groups;
> @@ -682,17 +673,5 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
>   
>   	drm_kms_helper_poll_init(dev);
>   
> -	if (dev->mode_config.num_connector) {
> -		fbdev = drm_fbdev_cma_init(dev, 32,
> -					   dev->mode_config.num_connector);
> -		if (IS_ERR(fbdev))
> -			return PTR_ERR(fbdev);
> -
> -		rcdu->fbdev = fbdev;
> -	} else {
> -		dev_info(rcdu->dev,
> -			 "no connector found, disabling fbdev emulation\n");
> -	}
> -
>   	return 0;
>   }
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Re: [PATCH v2 5/9] drm/rcar-du: Use drm_fbdev_generic_setup()

[Laurent Pinchart]

Hi Noralf,

Thank you for the patch.

On Wednesday, 28 November 2018 19:03:39 EET Noralf Trønnes wrote:
> Den 25.10.2018 22.13, skrev Noralf Trønnes:
> > The CMA helper is already using the drm_fb_helper_generic_probe part of
> > the generic fbdev emulation. This patch makes full use of the generic
> > fbdev emulation by using its drm_client callbacks. This means that
> > drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
> > now handled by the emulation code. Additionally fbdev unregister happens
> > automatically on drm_dev_unregister().
> > 
> > The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
> > driver. This is done to highlight the fact that fbdev emulation is an
> > internal client that makes use of the driver, it is not part of the
> > driver as such. If fbdev setup fails, an error is printed, but the driver
> > succeeds probing.
> > 
> > drm_fbdev_generic_setup() handles mode_config.num_connector being zero.
> > In that case it retries fbdev setup on the next .output_poll_changed.
> > 
> > Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
> > Acked-by: Sam Ravnborg <sam@ravnborg.org>
> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > ---
> > 
> > Changes since version 1:
> > - Rebased on: drm/rcar-du: Convert drm_atomic_helper_suspend/resume()
> > 
> > Laurent, do you want to take this through your tree, or do you want me to
> > apply it to drm-misc-next?
> > 
> >   drivers/gpu/drm/rcar-du/rcar_du_drv.c | 15 ++++-----------
> >   drivers/gpu/drm/rcar-du/rcar_du_drv.h |  2 --
> >   drivers/gpu/drm/rcar-du/rcar_du_kms.c | 21 ---------------------
> >   3 files changed, 4 insertions(+), 34 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> > b/drivers/gpu/drm/rcar-du/rcar_du_drv.c index 7015974c247a..27bfccd5b136
> > 100644
> > --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> > +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> > @@ -21,7 +21,9 @@
> >  #include <drm/drm_atomic_helper.h>
> >  #include <drm/drm_crtc_helper.h>
> >  #include <drm/drm_fb_cma_helper.h>
> > +#include <drm/drm_fb_helper.h>
> >  #include <drm/drm_gem_cma_helper.h>
> > +#include <drm/drm_modeset_helper.h>
> 
> I see that I forgot to remove this include when rebasing.
> 
> Will send a new version together with the other remaining patches.

Looks good to me, you can keep my Reviewed-by line. I'm fine with the patch 
being merged through the drm-misc tree.

> >   #include "rcar_du_drv.h"
> >   #include "rcar_du_kms.h"
> > 
> > @@ -363,19 +365,11 @@ MODULE_DEVICE_TABLE(of, rcar_du_of_table);
> >    * DRM operations
> >    */
> > 
> > -static void rcar_du_lastclose(struct drm_device *dev)
> > -{
> > -	struct rcar_du_device *rcdu = dev->dev_private;
> > -
> > -	drm_fbdev_cma_restore_mode(rcdu->fbdev);
> > -}
> > -
> >   DEFINE_DRM_GEM_CMA_FOPS(rcar_du_fops);
> >   
> >   static struct drm_driver rcar_du_driver = {
> >   	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
> >   				| DRIVER_ATOMIC,
> > -	.lastclose		= rcar_du_lastclose,
> >   	.gem_free_object_unlocked = drm_gem_cma_free_object,
> >   	.gem_vm_ops		= &drm_gem_cma_vm_ops,
> >   	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
> > @@ -431,9 +425,6 @@ static int rcar_du_remove(struct platform_device
> > *pdev)
> > 
> >   	drm_dev_unregister(ddev);
> > 
> > -	if (rcdu->fbdev)
> > -		drm_fbdev_cma_fini(rcdu->fbdev);
> > -
> >   	drm_kms_helper_poll_fini(ddev);
> >   	drm_mode_config_cleanup(ddev);
> > 
> > @@ -493,6 +484,8 @@ static int rcar_du_probe(struct platform_device *pdev)
> > 
> >   	DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
> > 
> > +	drm_fbdev_generic_setup(ddev, 32);
> > +
> >   	return 0;
> >   
> >   error:
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> > b/drivers/gpu/drm/rcar-du/rcar_du_drv.h index 9f5563296c5a..a68da79b424e
> > 100644
> > --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> > +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> > @@ -20,7 +20,6 @@
> >   struct clk;
> >   struct device;
> >   struct drm_device;
> > -struct drm_fbdev_cma;
> >   struct rcar_du_device;
> >   
> >   #define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK	BIT(0)	/* Per-CRTC IRQ and clock
> >   */
> > @@ -78,7 +77,6 @@ struct rcar_du_device {
> >   	void __iomem *mmio;
> >   	
> >   	struct drm_device *ddev;
> > -	struct drm_fbdev_cma *fbdev;
> >   	struct rcar_du_crtc crtcs[RCAR_DU_MAX_CRTCS];
> >   	unsigned int num_crtcs;
> > 
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> > b/drivers/gpu/drm/rcar-du/rcar_du_kms.c index 4ebd61ecbee1..6562871aa706
> > 100644
> > --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> > +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> > @@ -255,13 +255,6 @@ rcar_du_fb_create(struct drm_device *dev, struct
> > drm_file *file_priv,
> >   	return drm_gem_fb_create(dev, file_priv, mode_cmd);
> >   }
> > 
> > -static void rcar_du_output_poll_changed(struct drm_device *dev)
> > -{
> > -	struct rcar_du_device *rcdu = dev->dev_private;
> > -
> > -	drm_fbdev_cma_hotplug_event(rcdu->fbdev);
> > -}
> > -
> >   /* ---------------------------------------------------------------------
> >    * Atomic Check and Update
> >    */
> > @@ -308,7 +301,6 @@ static const struct drm_mode_config_helper_funcs
> > rcar_du_mode_config_helper = {
> >   static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = {
> >   	.fb_create = rcar_du_fb_create,
> > -	.output_poll_changed = rcar_du_output_poll_changed,
> >   	.atomic_check = rcar_du_atomic_check,
> >   	.atomic_commit = drm_atomic_helper_commit,
> >   };
> > @@ -543,7 +535,6 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
> > 
> >   	struct drm_device *dev = rcdu->ddev;
> >   	struct drm_encoder *encoder;
> > -	struct drm_fbdev_cma *fbdev;
> >   	unsigned int dpad0_sources;
> >   	unsigned int num_encoders;
> >   	unsigned int num_groups;
> > @@ -682,17 +673,5 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
> > 
> >   	drm_kms_helper_poll_init(dev);
> > 
> > -	if (dev->mode_config.num_connector) {
> > -		fbdev = drm_fbdev_cma_init(dev, 32,
> > -					   dev->mode_config.num_connector);
> > -		if (IS_ERR(fbdev))
> > -			return PTR_ERR(fbdev);
> > -
> > -		rcdu->fbdev = fbdev;
> > -	} else {
> > -		dev_info(rcdu->dev,
> > -			 "no connector found, disabling fbdev emulation\n");
> > -	}
> > -
> >   	return 0;
> >   }

-- 
Regards,

Laurent Pinchart



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Re: [PATCH v2 9/9] drm/cma-helper: Remove unused fbdev code

[Laurent Pinchart]

Hi Noralf,

Thank you for the patch.

On Thursday, 25 October 2018 23:13:40 EET Noralf Trønnes wrote:
> CMA helper drivers have been converted to drm_fbdev_generic_setup()
> so the fbdev code can be removed.
> 
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
> Acked-by: Sam Ravnborg <sam@ravnborg.org>
> ---
> 
> Changes since version 1:
> - Rebased
> 
>  drivers/gpu/drm/Kconfig             |   4 --
>  drivers/gpu/drm/drm_fb_cma_helper.c | 130 ---------------------------------
>  include/drm/drm_fb_cma_helper.h     |  22 ------
>  3 files changed, 156 deletions(-)
> 
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index 4385f00e1d05..bd943a71756c 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -170,10 +170,6 @@ config DRM_KMS_CMA_HELPER
>  	bool
>  	depends on DRM
>  	select DRM_GEM_CMA_HELPER
> -	select DRM_KMS_FB_HELPER
> -	select FB_SYS_FILLRECT
> -	select FB_SYS_COPYAREA
> -	select FB_SYS_IMAGEBLIT
>  	help
>  	  Choose this if you need the KMS CMA helper functions
> 
> diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c
> b/drivers/gpu/drm/drm_fb_cma_helper.c index fc2b42dd3dc6..0ddf9c65e5ab
> 100644
> --- a/drivers/gpu/drm/drm_fb_cma_helper.c
> +++ b/drivers/gpu/drm/drm_fb_cma_helper.c
> @@ -18,8 +18,6 @@
>   */
> 
>  #include <drm/drmP.h>
> -#include <drm/drm_client.h>
> -#include <drm/drm_fb_helper.h>
>  #include <drm/drm_framebuffer.h>
>  #include <drm/drm_gem_cma_helper.h>
>  #include <drm/drm_gem_framebuffer_helper.h>
> @@ -27,10 +25,6 @@
>  #include <drm/drm_print.h>

As far as I can tell, you can also drop drm/drm_fb_cma_helper.h and drm/
drm_print.h. If you include drm/drm_fourcc.h and drm/drm_plane.h, you can also 
drop drm/drmP.h.

Apart from that,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

>  #include <linux/module.h>
> 
> -struct drm_fbdev_cma {
> -	struct drm_fb_helper	fb_helper;
> -};
> -
>  /**
>   * DOC: framebuffer cma helper functions
>   *
> @@ -39,16 +33,8 @@ struct drm_fbdev_cma {
>   *
>   * drm_gem_fb_create() is used in the &drm_mode_config_funcs.fb_create
>   * callback function to create a cma backed framebuffer.
> - *
> - * An fbdev framebuffer backed by cma is also available by calling
> - * drm_fb_cma_fbdev_init(). drm_fb_cma_fbdev_fini() tears it down.
>   */
> 
> -static inline struct drm_fbdev_cma *to_fbdev_cma(struct drm_fb_helper
> *helper) -{
> -	return container_of(helper, struct drm_fbdev_cma, fb_helper);
> -}
> -
>  /**
>   * drm_fb_cma_get_gem_obj() - Get CMA GEM object for framebuffer
>   * @fb: The framebuffer
> @@ -105,119 +91,3 @@ dma_addr_t drm_fb_cma_get_gem_addr(struct
> drm_framebuffer *fb, return paddr;
>  }
>  EXPORT_SYMBOL_GPL(drm_fb_cma_get_gem_addr);
> -
> -/**
> - * drm_fb_cma_fbdev_init() - Allocate and initialize fbdev emulation
> - * @dev: DRM device
> - * @preferred_bpp: Preferred bits per pixel for the device.
> - *                 @dev->mode_config.preferred_depth is used if this is
> zero. - * @max_conn_count: Maximum number of connectors.
> - *                  @dev->mode_config.num_connector is used if this is
> zero. - *
> - * Returns:
> - * Zero on success or negative error code on failure.
> - */
> -int drm_fb_cma_fbdev_init(struct drm_device *dev, unsigned int
> preferred_bpp, -			  unsigned int max_conn_count)
> -{
> -	struct drm_fbdev_cma *fbdev_cma;
> -
> -	/* dev->fb_helper will indirectly point to fbdev_cma after this call */
> -	fbdev_cma = drm_fbdev_cma_init(dev, preferred_bpp, max_conn_count);
> -	return PTR_ERR_OR_ZERO(fbdev_cma);
> -}
> -EXPORT_SYMBOL_GPL(drm_fb_cma_fbdev_init);
> -
> -/**
> - * drm_fb_cma_fbdev_fini() - Teardown fbdev emulation
> - * @dev: DRM device
> - */
> -void drm_fb_cma_fbdev_fini(struct drm_device *dev)
> -{
> -	if (dev->fb_helper)
> -		drm_fbdev_cma_fini(to_fbdev_cma(dev->fb_helper));
> -}
> -EXPORT_SYMBOL_GPL(drm_fb_cma_fbdev_fini);
> -
> -static const struct drm_fb_helper_funcs drm_fb_cma_helper_funcs = {
> -	.fb_probe = drm_fb_helper_generic_probe,
> -};
> -
> -/**
> - * drm_fbdev_cma_init() - Allocate and initializes a drm_fbdev_cma struct
> - * @dev: DRM device
> - * @preferred_bpp: Preferred bits per pixel for the device
> - * @max_conn_count: Maximum number of connectors
> - *
> - * Returns a newly allocated drm_fbdev_cma struct or a ERR_PTR.
> - */
> -struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev,
> -	unsigned int preferred_bpp, unsigned int max_conn_count)
> -{
> -	struct drm_fbdev_cma *fbdev_cma;
> -	struct drm_fb_helper *fb_helper;
> -	int ret;
> -
> -	fbdev_cma = kzalloc(sizeof(*fbdev_cma), GFP_KERNEL);
> -	if (!fbdev_cma)
> -		return ERR_PTR(-ENOMEM);
> -
> -	fb_helper = &fbdev_cma->fb_helper;
> -
> -	ret = drm_client_new(dev, &fb_helper->client, "fbdev", NULL);
> -	if (ret)
> -		goto err_free;
> -
> -	ret = drm_fb_helper_fbdev_setup(dev, fb_helper, &drm_fb_cma_helper_funcs,
> -					preferred_bpp, max_conn_count);
> -	if (ret)
> -		goto err_client_put;
> -
> -	return fbdev_cma;
> -
> -err_client_put:
> -	drm_client_release(&fb_helper->client);
> -err_free:
> -	kfree(fbdev_cma);
> -
> -	return ERR_PTR(ret);
> -}
> -EXPORT_SYMBOL_GPL(drm_fbdev_cma_init);
> -
> -/**
> - * drm_fbdev_cma_fini() - Free drm_fbdev_cma struct
> - * @fbdev_cma: The drm_fbdev_cma struct
> - */
> -void drm_fbdev_cma_fini(struct drm_fbdev_cma *fbdev_cma)
> -{
> -	drm_fb_helper_unregister_fbi(&fbdev_cma->fb_helper);
> -	/* All resources have now been freed by drm_fbdev_fb_destroy() */
> -}
> -EXPORT_SYMBOL_GPL(drm_fbdev_cma_fini);
> -
> -/**
> - * drm_fbdev_cma_restore_mode() - Restores initial framebuffer mode
> - * @fbdev_cma: The drm_fbdev_cma struct, may be NULL
> - *
> - * This function is usually called from the &drm_driver.lastclose callback.
> - */
> -void drm_fbdev_cma_restore_mode(struct drm_fbdev_cma *fbdev_cma)
> -{
> -	if (fbdev_cma)
> -		drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev_cma->fb_helper);
> -}
> -EXPORT_SYMBOL_GPL(drm_fbdev_cma_restore_mode);
> -
> -/**
> - * drm_fbdev_cma_hotplug_event() - Poll for hotpulug events
> - * @fbdev_cma: The drm_fbdev_cma struct, may be NULL
> - *
> - * This function is usually called from the
> &drm_mode_config.output_poll_changed - * callback.
> - */
> -void drm_fbdev_cma_hotplug_event(struct drm_fbdev_cma *fbdev_cma)
> -{
> -	if (fbdev_cma)
> -		drm_fb_helper_hotplug_event(&fbdev_cma->fb_helper);
> -}
> -EXPORT_SYMBOL_GPL(drm_fbdev_cma_hotplug_event);
> diff --git a/include/drm/drm_fb_cma_helper.h
> b/include/drm/drm_fb_cma_helper.h index 8dbbe1eece1b..4becb09975a4 100644
> --- a/include/drm/drm_fb_cma_helper.h
> +++ b/include/drm/drm_fb_cma_helper.h
> @@ -2,31 +2,9 @@
>  #ifndef __DRM_FB_CMA_HELPER_H__
>  #define __DRM_FB_CMA_HELPER_H__
> 
> -struct drm_fbdev_cma;
> -struct drm_gem_cma_object;
> -
> -struct drm_fb_helper_surface_size;
> -struct drm_framebuffer_funcs;
> -struct drm_fb_helper_funcs;
>  struct drm_framebuffer;
> -struct drm_fb_helper;
> -struct drm_device;
> -struct drm_file;
> -struct drm_mode_fb_cmd2;
> -struct drm_plane;
>  struct drm_plane_state;
> 
> -int drm_fb_cma_fbdev_init(struct drm_device *dev, unsigned int
> preferred_bpp, -			  unsigned int max_conn_count);
> -void drm_fb_cma_fbdev_fini(struct drm_device *dev);
> -
> -struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev,
> -	unsigned int preferred_bpp, unsigned int max_conn_count);
> -void drm_fbdev_cma_fini(struct drm_fbdev_cma *fbdev_cma);
> -
> -void drm_fbdev_cma_restore_mode(struct drm_fbdev_cma *fbdev_cma);
> -void drm_fbdev_cma_hotplug_event(struct drm_fbdev_cma *fbdev_cma);
> -
>  struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer
> *fb, unsigned int plane);


-- 
Regards,

Laurent Pinchart



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