[PATCH v4 0/4] drm: panel: add support for TDO tl070wsh30 panel

[PATCH v4 0/4] drm: panel: add support for TDO tl070wsh30 panel

[Neil Armstrong]

This adds support bindings and support for the TDO TL070WSH30 TFT-LCD panel
module shipped with the Amlogic S400 Development Kit.
The panel has a 1024×600 resolution and uses 24 bit RGB per pixel.
It provides a MIPI DSI interface to the host, a built-in LED backlight
and touch controller.

Changes since v3 at [3]:
- reordered tdo vendor prefix

Changes since v2 at [2]:
- added reset gpio to panel-simple-dsi bindings
- moved bindings to panel-simple
- re-ordered prepare/unprepare
- added back refresh print
- moved regulator/reset handling in prepare/unprepare
- aligned remove/shutdown with panel-simple
- added sentinel comment into dt match table

Changes since v1 at [1]:
- added missing vendor-prefixes patch
- removed vrefresh
- fixed warning on add_panel return
- removed DRM logging

[1] https://patchwork.freedesktop.org/series/81376/#rev1
[2] https://patchwork.freedesktop.org/series/81376/#rev2
[3] https://patchwork.freedesktop.org/series/81376/#rev3

Neil Armstrong (4):
  dt-bindings: vendor-prefixes: Add Shanghai Top Display
    Optolelectronics vendor prefix
  dt-bindings: display: panel-simple-dsi: add optional reset gpio
  dt-bindings: display: panel-simple-dsi: add TDO TL070WSH30 DSI panel
    bindings
  drm: panel: add TDO tl070wsh30 panel driver

 .../display/panel/panel-simple-dsi.yaml       |   3 +
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 drivers/gpu/drm/panel/Kconfig                 |  11 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c  | 250 ++++++++++++++++++
 5 files changed, 267 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c

-- 
2.22.0

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[PATCH v4 1/4] dt-bindings: vendor-prefixes: Add Shanghai Top Display Optolelectronics vendor prefix

[Neil Armstrong]

Shanghai Top Display Optolelectronics Co., Ltd  is a display manufacturer
from Shanghai.
Web site of the company: http://www.shtdo.com/

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index a1e4356cf522..fecdc7200b40 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1037,6 +1037,8 @@ patternProperties:
     description: Trusted Computing Group
   "^tcl,.*":
     description: Toby Churchill Ltd.
+  "^tdo,.*":
+    description: Shangai Top Display Optoelectronics Co., Ltd
   "^technexion,.*":
     description: TechNexion
   "^technologic,.*":
-- 
2.22.0

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[PATCH v4 2/4] dt-bindings: display: panel-simple-dsi: add optional reset gpio

[Neil Armstrong]

Simple DSI panels can also have a reset GPIO signal in addition/instead of an
enable GPIO signal.

This adds an optional reset-gpios property.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 .../devicetree/bindings/display/panel/panel-simple-dsi.yaml      | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
index c0dd9fa29f1d..4d08e746cb21 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
@@ -54,6 +54,7 @@ properties:
 
   backlight: true
   enable-gpios: true
+  reset-gpios: true
   port: true
   power-supply: true
 
-- 
2.22.0

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[PATCH v4 3/4] dt-bindings: display: panel-simple-dsi: add TDO TL070WSH30 DSI panel bindings

[Neil Armstrong]

This add the bindings for the 1024x600 TFT LCD TL070WSH30 DSI panel to panel-simple-dsi.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 .../devicetree/bindings/display/panel/panel-simple-dsi.yaml     | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
index 4d08e746cb21..a29ab65507f0 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
@@ -47,6 +47,8 @@ properties:
       - panasonic,vvx10f004b00
         # Panasonic 10" WUXGA TFT LCD panel
       - panasonic,vvx10f034n00
+        # Shangai Top Display Optoelectronics 7" TL070WSH30 1024x600 TFT LCD panel
+      - tdo,tl070wsh30
 
   reg:
     maxItems: 1
-- 
2.22.0

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[PATCH v4 4/4] drm: panel: add TDO tl070wsh30 panel driver

[Neil Armstrong]

This adds support for the TDO TL070WSH30 TFT-LCD panel module.
The panel has a 1024×600 resolution and uses 24 bit RGB per pixel.
It provides a MIPI DSI interface to the host, a built-in LED backlight
and touch controller.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/gpu/drm/panel/Kconfig                |  11 +
 drivers/gpu/drm/panel/Makefile               |   1 +
 drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c | 250 +++++++++++++++++++
 3 files changed, 262 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 8d97d07c5871..2d488a875b99 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -433,6 +433,17 @@ config DRM_PANEL_SONY_ACX565AKM
 	  Say Y here if you want to enable support for the Sony ACX565AKM
 	  800x600 3.5" panel (found on the Nokia N900).
 
+config DRM_PANEL_TDO_TL070WSH30
+	tristate "TDO TL070WSH30 DSI panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to enable support for TDO TL070WSH30 TFT-LCD
+	  panel module. The panel has a 1024×600 resolution and uses
+	  24 bit RGB per pixel. It provides a MIPI DSI interface to
+	  the host, a built-in LED backlight and touch controller.
+
 config DRM_PANEL_TPO_TD028TTEC1
 	tristate "Toppoly (TPO) TD028TTEC1 panel driver"
 	depends on OF && SPI
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 15a4e7752951..35ee06a1b5c2 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7703) += panel-sitronix-st7703.o
 obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o
 obj-$(CONFIG_DRM_PANEL_SONY_ACX424AKP) += panel-sony-acx424akp.o
 obj-$(CONFIG_DRM_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
+obj-$(CONFIG_DRM_PANEL_TDO_TL070WSH30) += panel-tdo-tl070wsh30.o
 obj-$(CONFIG_DRM_PANEL_TPO_TD028TTEC1) += panel-tpo-td028ttec1.o
 obj-$(CONFIG_DRM_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
 obj-$(CONFIG_DRM_PANEL_TPO_TPG110) += panel-tpo-tpg110.o
diff --git a/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c b/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c
new file mode 100644
index 000000000000..820731be7147
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c
@@ -0,0 +1,250 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+struct tdo_tl070wsh30_panel {
+	struct drm_panel base;
+	struct mipi_dsi_device *link;
+
+	struct regulator *supply;
+	struct gpio_desc *reset_gpio;
+
+	bool prepared;
+};
+
+static inline
+struct tdo_tl070wsh30_panel *to_tdo_tl070wsh30_panel(struct drm_panel *panel)
+{
+	return container_of(panel, struct tdo_tl070wsh30_panel, base);
+}
+
+static int tdo_tl070wsh30_panel_prepare(struct drm_panel *panel)
+{
+	struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
+	int err;
+
+	if (tdo_tl070wsh30->prepared)
+		return 0;
+
+	err = regulator_enable(tdo_tl070wsh30->supply);
+	if (err < 0)
+		return err;
+
+	usleep_range(10000, 11000);
+
+	gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 1);
+
+	usleep_range(10000, 11000);
+
+	gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 0);
+
+	msleep(200);
+
+	err = mipi_dsi_dcs_exit_sleep_mode(tdo_tl070wsh30->link);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
+		regulator_disable(tdo_tl070wsh30->supply);
+		return err;
+	}
+
+	msleep(200);
+
+	err = mipi_dsi_dcs_set_display_on(tdo_tl070wsh30->link);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to set display on: %d\n", err);
+		regulator_disable(tdo_tl070wsh30->supply);
+		return err;
+	}
+
+	msleep(20);
+
+	tdo_tl070wsh30->prepared = true;
+
+	return 0;
+}
+
+static int tdo_tl070wsh30_panel_unprepare(struct drm_panel *panel)
+{
+	struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
+	int err;
+
+	if (!tdo_tl070wsh30->prepared)
+		return 0;
+
+	err = mipi_dsi_dcs_set_display_off(tdo_tl070wsh30->link);
+	if (err < 0)
+		dev_err(panel->dev, "failed to set display off: %d\n", err);
+
+	usleep_range(10000, 11000);
+
+	err = mipi_dsi_dcs_enter_sleep_mode(tdo_tl070wsh30->link);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
+		return err;
+	}
+
+	usleep_range(10000, 11000);
+
+	regulator_disable(tdo_tl070wsh30->supply);
+
+	tdo_tl070wsh30->prepared = false;
+
+	return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+	.clock = 47250,
+	.hdisplay = 1024,
+	.hsync_start = 1024 + 46,
+	.hsync_end = 1024 + 46 + 80,
+	.htotal = 1024 + 46 + 80 + 100,
+	.vdisplay = 600,
+	.vsync_start = 600 + 5,
+	.vsync_end = 600 + 5 + 5,
+	.vtotal = 600 + 5 + 5 + 20,
+	.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
+};
+
+static int tdo_tl070wsh30_panel_get_modes(struct drm_panel *panel,
+				       struct drm_connector *connector)
+{
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(connector->dev, &default_mode);
+	if (!mode) {
+		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
+			default_mode.hdisplay, default_mode.vdisplay,
+			drm_mode_vrefresh(&default_mode));
+		return -ENOMEM;
+	}
+
+	drm_mode_set_name(mode);
+
+	drm_mode_probed_add(connector, mode);
+
+	connector->display_info.width_mm = 154;
+	connector->display_info.height_mm = 85;
+	connector->display_info.bpc = 8;
+
+	return 1;
+}
+
+static const struct drm_panel_funcs tdo_tl070wsh30_panel_funcs = {
+	.unprepare = tdo_tl070wsh30_panel_unprepare,
+	.prepare = tdo_tl070wsh30_panel_prepare,
+	.get_modes = tdo_tl070wsh30_panel_get_modes,
+};
+
+static const struct of_device_id tdo_tl070wsh30_of_match[] = {
+	{ .compatible = "tdo,tl070wsh30", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, tdo_tl070wsh30_of_match);
+
+static int tdo_tl070wsh30_panel_add(struct tdo_tl070wsh30_panel *tdo_tl070wsh30)
+{
+	struct device *dev = &tdo_tl070wsh30->link->dev;
+	int err;
+
+	tdo_tl070wsh30->supply = devm_regulator_get(dev, "power");
+	if (IS_ERR(tdo_tl070wsh30->supply))
+		return PTR_ERR(tdo_tl070wsh30->supply);
+
+	tdo_tl070wsh30->reset_gpio = devm_gpiod_get(dev, "reset",
+						    GPIOD_OUT_LOW);
+	if (IS_ERR(tdo_tl070wsh30->reset_gpio)) {
+		err = PTR_ERR(tdo_tl070wsh30->reset_gpio);
+		dev_dbg(dev, "failed to get reset gpio: %d\n", err);
+		return err;
+	}
+
+	drm_panel_init(&tdo_tl070wsh30->base, &tdo_tl070wsh30->link->dev,
+		       &tdo_tl070wsh30_panel_funcs, DRM_MODE_CONNECTOR_DSI);
+
+	err = drm_panel_of_backlight(&tdo_tl070wsh30->base);
+	if (err)
+		return err;
+
+	drm_panel_add(&tdo_tl070wsh30->base);
+
+	return 0;
+}
+
+static int tdo_tl070wsh30_panel_probe(struct mipi_dsi_device *dsi)
+{
+	struct tdo_tl070wsh30_panel *tdo_tl070wsh30;
+	int err;
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
+
+	tdo_tl070wsh30 = devm_kzalloc(&dsi->dev, sizeof(*tdo_tl070wsh30),
+				    GFP_KERNEL);
+	if (!tdo_tl070wsh30)
+		return -ENOMEM;
+
+	mipi_dsi_set_drvdata(dsi, tdo_tl070wsh30);
+	tdo_tl070wsh30->link = dsi;
+
+	err = tdo_tl070wsh30_panel_add(tdo_tl070wsh30);
+	if (err < 0)
+		return err;
+
+	return mipi_dsi_attach(dsi);
+}
+
+static int tdo_tl070wsh30_panel_remove(struct mipi_dsi_device *dsi)
+{
+	struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
+	int err;
+
+	err = mipi_dsi_detach(dsi);
+	if (err < 0)
+		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
+
+	drm_panel_remove(&tdo_tl070wsh30->base);
+	drm_panel_disable(&tdo_tl070wsh30->base);
+	drm_panel_unprepare(&tdo_tl070wsh30->base);
+
+	return 0;
+}
+
+static void tdo_tl070wsh30_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+	struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_disable(&tdo_tl070wsh30->base);
+	drm_panel_unprepare(&tdo_tl070wsh30->base);
+}
+
+static struct mipi_dsi_driver tdo_tl070wsh30_panel_driver = {
+	.driver = {
+		.name = "panel-tdo-tl070wsh30",
+		.of_match_table = tdo_tl070wsh30_of_match,
+	},
+	.probe = tdo_tl070wsh30_panel_probe,
+	.remove = tdo_tl070wsh30_panel_remove,
+	.shutdown = tdo_tl070wsh30_panel_shutdown,
+};
+module_mipi_dsi_driver(tdo_tl070wsh30_panel_driver);
+
+MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
+MODULE_DESCRIPTION("TDO TL070WSH30 panel driver");
+MODULE_LICENSE("GPL v2");
-- 
2.22.0

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Re: [PATCH v4 1/4] dt-bindings: vendor-prefixes: Add Shanghai Top Display Optolelectronics vendor prefix

[Rob Herring]

On Tue, 15 Sep 2020 14:19:09 +0200, Neil Armstrong wrote:
> Shanghai Top Display Optolelectronics Co., Ltd  is a display manufacturer
> from Shanghai.
> Web site of the company: http://www.shtdo.com/
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
>  1 file changed, 2 insertions(+)
> 

Acked-by: Rob Herring <robh@kernel.org>
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Re: [PATCH v4 2/4] dt-bindings: display: panel-simple-dsi: add optional reset gpio

[Rob Herring]

On Tue, 15 Sep 2020 14:19:10 +0200, Neil Armstrong wrote:
> Simple DSI panels can also have a reset GPIO signal in addition/instead of an
> enable GPIO signal.
> 
> This adds an optional reset-gpios property.
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  .../devicetree/bindings/display/panel/panel-simple-dsi.yaml      | 1 +
>  1 file changed, 1 insertion(+)
> 

Acked-by: Rob Herring <robh@kernel.org>
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Re: [PATCH v4 3/4] dt-bindings: display: panel-simple-dsi: add TDO TL070WSH30 DSI panel bindings

[Rob Herring]

On Tue, 15 Sep 2020 14:19:11 +0200, Neil Armstrong wrote:
> This add the bindings for the 1024x600 TFT LCD TL070WSH30 DSI panel to panel-simple-dsi.
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  .../devicetree/bindings/display/panel/panel-simple-dsi.yaml     | 2 ++
>  1 file changed, 2 insertions(+)
> 

Acked-by: Rob Herring <robh@kernel.org>
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Re: [PATCH v4 0/4] drm: panel: add support for TDO tl070wsh30 panel

[Neil Armstrong]

Hi Sam,

Is there anything more to change ?

Thanks,
Neil

On 15/09/2020 14:19, Neil Armstrong wrote:
> This adds support bindings and support for the TDO TL070WSH30 TFT-LCD panel
> module shipped with the Amlogic S400 Development Kit.
> The panel has a 1024×600 resolution and uses 24 bit RGB per pixel.
> It provides a MIPI DSI interface to the host, a built-in LED backlight
> and touch controller.
> 
> Changes since v3 at [3]:
> - reordered tdo vendor prefix
> 
> Changes since v2 at [2]:
> - added reset gpio to panel-simple-dsi bindings
> - moved bindings to panel-simple
> - re-ordered prepare/unprepare
> - added back refresh print
> - moved regulator/reset handling in prepare/unprepare
> - aligned remove/shutdown with panel-simple
> - added sentinel comment into dt match table
> 
> Changes since v1 at [1]:
> - added missing vendor-prefixes patch
> - removed vrefresh
> - fixed warning on add_panel return
> - removed DRM logging
> 
> [1] https://patchwork.freedesktop.org/series/81376/#rev1
> [2] https://patchwork.freedesktop.org/series/81376/#rev2
> [3] https://patchwork.freedesktop.org/series/81376/#rev3
> 
> Neil Armstrong (4):
>   dt-bindings: vendor-prefixes: Add Shanghai Top Display
>     Optolelectronics vendor prefix
>   dt-bindings: display: panel-simple-dsi: add optional reset gpio
>   dt-bindings: display: panel-simple-dsi: add TDO TL070WSH30 DSI panel
>     bindings
>   drm: panel: add TDO tl070wsh30 panel driver
> 
>  .../display/panel/panel-simple-dsi.yaml       |   3 +
>  .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
>  drivers/gpu/drm/panel/Kconfig                 |  11 +
>  drivers/gpu/drm/panel/Makefile                |   1 +
>  drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c  | 250 ++++++++++++++++++
>  5 files changed, 267 insertions(+)
>  create mode 100644 drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c
> 

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Re: [PATCH v4 0/4] drm: panel: add support for TDO tl070wsh30 panel

[Sam Ravnborg]

Hi Neil.

On Tue, Sep 29, 2020 at 11:25:17AM +0200, Neil Armstrong wrote:
> Hi Sam,
> 
> Is there anything more to change ?
Sorry for taking so long to get back to you on this.

All patches looks good and are:
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>

I assume you will apply the patches.

	Sam
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Re: [PATCH v4 0/4] drm: panel: add support for TDO tl070wsh30 panel

[Neil Armstrong]

On 17/10/2020 08:08, Sam Ravnborg wrote:
> Hi Neil.
> 
> On Tue, Sep 29, 2020 at 11:25:17AM +0200, Neil Armstrong wrote:
>> Hi Sam,
>>
>> Is there anything more to change ?
> Sorry for taking so long to get back to you on this.
> 
> All patches looks good and are:
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> 
> I assume you will apply the patches.

Indeed,

Thanks !

Applying to drm-misc-next

> 
> 	Sam
> 

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