[PATCH v5 0/3] Add support for the S6E3HA2 panel on TM2 board

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* [PATCH v5 0/3] Add support for the S6E3HA2 panel on TM2 board
       [not found] <CGME20170104081520epcas1p42dd46f1d13adfde20a2559bd5c1cbd3d@epcas1p4.samsung.com>
@ 2017-01-04  8:15 ` Hoegeun Kwon
       [not found]   ` <CGME20170104081521epcas1p40d5fbfbe0600d0df05e77b36ce6a353f@epcas1p4.samsung.com>
                     ` (3 more replies)
  0 siblings, 4 replies; 13+ messages in thread
From: Hoegeun Kwon @ 2017-01-04  8:15 UTC (permalink / raw)
  To: robh, thierry.reding, airlied, kgene, krzk, inki.dae
  Cc: devicetree, linux-samsung-soc, linux-kernel, dri-devel,
	jh80.chung, cw00.choi, Hoegeun Kwon

Purpose of this patch is add support for S6E3HA2 AMOLED panel on
the TM2 board. The first patch adds support for S6E3HA2 panel
device tree document and driver, the second patch add support for
S6E3HA2 panel device tree.

Change for V5:
- The V5 has only one fix in V4 below.
- Removed the enable check of the mic driver in mode_set
  callback, because mode_set should be performed every time.

Changes for V4:
- Removed display-timings in devicetree, the display-timings has
  been fixed to be provided by the device driver.
- Added the mode_set callback function into exynos_drm_mic,
  because the exynos_drm_mic driver can not parse a videomode
  struct by removing the display-timings from the devicetree.

Hoegeun Kwon (2):
  drm/exynos: mic: Add mode_set callback function
  drm/panel: Add support for S6E3HA2 panel driver on TM2 board

Hyungwon Hwang (1):
  arm64: dts: exynos: Add support for S6E3HA2 panel device on TM2 board

 .../bindings/display/panel/samsung,s6e3ha2.txt     |  40 ++
 arch/arm64/boot/dts/exynos/exynos5433-tm2.dts      |  17 +
 drivers/gpu/drm/exynos/exynos_drm_mic.c            |  30 +-
 drivers/gpu/drm/panel/Kconfig                      |   6 +
 drivers/gpu/drm/panel/Makefile                     |   1 +
 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c      | 741 +++++++++++++++++++++
 6 files changed, 824 insertions(+), 11 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
 create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c

-- 
1.9.1

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^ permalink raw reply	[flat|nested] 13+ messages in thread

[parent not found: <CGME20170104081521epcas1p40d5fbfbe0600d0df05e77b36ce6a353f@epcas1p4.samsung.com>]

* [PATCH v5 1/3] drm/exynos: mic: Add mode_set callback function
       [not found]   ` <CGME20170104081521epcas1p40d5fbfbe0600d0df05e77b36ce6a353f@epcas1p4.samsung.com>
@ 2017-01-04  8:15     ` Hoegeun Kwon
  2017-01-04  9:05       ` Andrzej Hajda
  0 siblings, 1 reply; 13+ messages in thread
From: Hoegeun Kwon @ 2017-01-04  8:15 UTC (permalink / raw)
  To: robh, thierry.reding, airlied, kgene, krzk, inki.dae
  Cc: devicetree, linux-samsung-soc, linux-kernel, dri-devel,
	jh80.chung, cw00.choi, Hoegeun Kwon

Before applying the patch, used the of_get_videomode function to
parse the display-timings in the panel which is the child driver
of dsi in the devicetree. this is wrong. So removed the
of_get_videomode and fixed to get videomode struct through
mode_set callback function.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_mic.c | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c b/drivers/gpu/drm/exynos/exynos_drm_mic.c
index a0def0b..a0f459c 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
@@ -286,13 +286,6 @@ static int parse_dt(struct exynos_mic *mic)
 			}
 			nodes[j++] = remote_node;
 
-			ret = of_get_videomode(remote_node,
-							&mic->vm, 0);
-			if (ret) {
-				DRM_ERROR("mic: failed to get videomode");
-				goto exit;
-			}
-
 			break;
 		default:
 			DRM_ERROR("mic: Unknown endpoint from MIC");
@@ -329,6 +322,24 @@ static void mic_post_disable(struct drm_bridge *bridge)
 	mutex_unlock(&mic_mutex);
 }
 
+static void mic_mode_set(struct drm_bridge *bridge,
+			struct drm_display_mode *mode,
+			struct drm_display_mode *adjusted_mode)
+{
+	struct exynos_mic *mic = bridge->driver_private;
+
+	mutex_lock(&mic_mutex);
+
+	drm_display_mode_to_videomode(mode, &mic->vm);
+
+	if (!mic->i80_mode)
+		mic_set_porch_timing(mic);
+	mic_set_img_size(mic);
+	mic_set_output_timing(mic);
+
+	mutex_unlock(&mic_mutex);
+}
+
 static void mic_pre_enable(struct drm_bridge *bridge)
 {
 	struct exynos_mic *mic = bridge->driver_private;
@@ -355,10 +366,6 @@ static void mic_pre_enable(struct drm_bridge *bridge)
 		goto turn_off_clks;
 	}
 
-	if (!mic->i80_mode)
-		mic_set_porch_timing(mic);
-	mic_set_img_size(mic);
-	mic_set_output_timing(mic);
 	mic_set_reg_on(mic, 1);
 	mic->enabled = 1;
 	mutex_unlock(&mic_mutex);
@@ -377,6 +384,7 @@ static void mic_enable(struct drm_bridge *bridge) { }
 static const struct drm_bridge_funcs mic_bridge_funcs = {
 	.disable = mic_disable,
 	.post_disable = mic_post_disable,
+	.mode_set = mic_mode_set,
 	.pre_enable = mic_pre_enable,
 	.enable = mic_enable,
 };
-- 
1.9.1

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^ permalink raw reply related	[flat|nested] 13+ messages in thread

* Re: [PATCH v5 1/3] drm/exynos: mic: Add mode_set callback function
  2017-01-04  8:15     ` [PATCH v5 1/3] drm/exynos: mic: Add mode_set callback function Hoegeun Kwon
@ 2017-01-04  9:05       ` Andrzej Hajda
  0 siblings, 0 replies; 13+ messages in thread
From: Andrzej Hajda @ 2017-01-04  9:05 UTC (permalink / raw)
  To: Hoegeun Kwon, robh, thierry.reding, airlied, kgene, krzk,
	inki.dae
  Cc: devicetree, linux-samsung-soc, linux-kernel, dri-devel,
	jh80.chung, cw00.choi

On 04.01.2017 09:15, Hoegeun Kwon wrote:
> Before applying the patch, used the of_get_videomode function to
> parse the display-timings in the panel which is the child driver
> of dsi in the devicetree. this is wrong. So removed the
> of_get_videomode and fixed to get videomode struct through
> mode_set callback function.
>
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>

Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>

Only one, non-blocking comment below.

> ---
>  drivers/gpu/drm/exynos/exynos_drm_mic.c | 30 +++++++++++++++++++-----------
>  1 file changed, 19 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c b/drivers/gpu/drm/exynos/exynos_drm_mic.c
> index a0def0b..a0f459c 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
> @@ -286,13 +286,6 @@ static int parse_dt(struct exynos_mic *mic)
>  			}
>  			nodes[j++] = remote_node;
>  
> -			ret = of_get_videomode(remote_node,
> -							&mic->vm, 0);
> -			if (ret) {
> -				DRM_ERROR("mic: failed to get videomode");
> -				goto exit;
> -			}
> -

I think the whole parse_dt function should be refactored, but it can be
done later in separate patch.

Regards
Andrzej
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^ permalink raw reply	[flat|nested] 13+ messages in thread

[parent not found: <CGME20170104081522epcas5p112698b2499e56dc9027ec1f57f8964ee@epcas5p1.samsung.com>]

* [PATCH v5 2/3] drm/panel: Add support for S6E3HA2 panel driver on TM2 board
       [not found]   ` <CGME20170104081522epcas5p112698b2499e56dc9027ec1f57f8964ee@epcas5p1.samsung.com>
@ 2017-01-04  8:15     ` Hoegeun Kwon
  2017-01-04  8:20       ` Chanwoo Choi
                         ` (2 more replies)
  0 siblings, 3 replies; 13+ messages in thread
From: Hoegeun Kwon @ 2017-01-04  8:15 UTC (permalink / raw)
  To: robh, thierry.reding, airlied, kgene, krzk, inki.dae
  Cc: devicetree, linux-samsung-soc, Donghwa Lee, linux-kernel,
	dri-devel, jh80.chung, cw00.choi, Hyungwon Hwang, Hoegeun Kwon

This patch add support for MIPI-DSI based S6E3HA2 AMOLED panel
driver. This panel has 1440x2560 resolution in 5.7-inch physical
panel in the TM2 device.

Signed-off-by: Donghwa Lee <dh09.lee@samsung.com>
Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
---
 .../bindings/display/panel/samsung,s6e3ha2.txt     |  40 ++
 drivers/gpu/drm/panel/Kconfig                      |   6 +
 drivers/gpu/drm/panel/Makefile                     |   1 +
 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c      | 741 +++++++++++++++++++++
 4 files changed, 788 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
 create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c

diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
new file mode 100644
index 0000000..6879f51
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
@@ -0,0 +1,40 @@
+Samsung S6E3HA2 5.7" 1440x2560 AMOLED panel
+
+Required properties:
+  - compatible: "samsung,s6e3ha2"
+  - reg: the virtual channel number of a DSI peripheral
+  - vdd3-supply: I/O voltage supply
+  - vci-supply: voltage supply for analog circuits
+  - reset-gpios: a GPIO spec for the reset pin (active low)
+  - enable-gpios: a GPIO spec for the panel enable pin (active high)
+  - te-gpios: a GPIO spec for the tearing effect synchronization signal
+    gpio pin (active high)
+
+The device node can contain one 'port' child node with one child
+'endpoint' node, according to the bindings defined in [1]. This
+node should describe panel's video bus.
+
+[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
+
+Example:
+
+&dsi {
+	...
+
+	panel@0 {
+		compatible = "samsung,s6e3ha2";
+		reg = <0>;
+		vdd3-supply = <&ldo27_reg>;
+		vci-supply = <&ldo28_reg>;
+		reset-gpios = <&gpg0 0 GPIO_ACTIVE_LOW>;
+		enable-gpios = <&gpf1 5 GPIO_ACTIVE_HIGH>;
+		te-gpios = <&gpf1 3 GPIO_ACTIVE_HIGH>;
+
+		port {
+			panel_in: endpoint {
+				remote-endpoint = <&dsi_out>;
+			};
+		};
+	};
+};
+
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 62aba97..eea2902 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -52,6 +52,12 @@ config DRM_PANEL_PANASONIC_VVX10F034N00
 	  WUXGA (1920x1200) Novatek NT1397-based DSI panel as found in some
 	  Xperia Z2 tablets
 
+config DRM_PANEL_SAMSUNG_S6E3HA2
+	tristate "Samsung S6E3HA2 DSI video mode panel"
+	depends on OF
+	depends on  DRM_MIPI_DSI
+	select VIDEOMODE_HELPERS
+
 config DRM_PANEL_SAMSUNG_S6E8AA0
 	tristate "Samsung S6E8AA0 DSI video mode panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index a5c7ec0..1d483b0 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
 obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
 obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
+obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
 obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
 obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
new file mode 100644
index 0000000..8c5a1c2
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
@@ -0,0 +1,741 @@
+/*
+ * MIPI-DSI based s6e3ha2 AMOLED 5.7 inch panel driver.
+ *
+ * Copyright (c) 2016 Samsung Electronics Co., Ltd.
+ * Donghwa Lee <dh09.lee@samsung.com>
+ * Hyungwon Hwang <human.hwang@samsung.com>
+ * Hoegeun Kwon <hoegeun.kwon@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+#include <linux/backlight.h>
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/consumer.h>
+
+#define S6E3HA2_MIN_BRIGHTNESS		0
+#define S6E3HA2_MAX_BRIGHTNESS		100
+#define S6E3HA2_DEFAULT_BRIGHTNESS	80
+
+#define S6E3HA2_NUM_GAMMA_STEPS		46
+#define S6E3HA2_GAMMA_CMD_CNT		35
+#define S6E3HA2_VINT_STATUS_MAX		10
+
+static const u8 gamma_tbl[S6E3HA2_NUM_GAMMA_STEPS][S6E3HA2_GAMMA_CMD_CNT] = {
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x82, 0x83,
+	  0x85, 0x88, 0x8b, 0x8b, 0x84, 0x88, 0x82, 0x82, 0x89, 0x86, 0x8c,
+	  0x94, 0x84, 0xb1, 0xaf, 0x8e, 0xcf, 0xad, 0xc9, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x84, 0x84,
+	  0x85, 0x87, 0x8b, 0x8a, 0x84, 0x88, 0x82, 0x82, 0x89, 0x86, 0x8a,
+	  0x93, 0x84, 0xb0, 0xae, 0x8e, 0xc9, 0xa8, 0xc5, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
+	  0x85, 0x86, 0x8a, 0x8a, 0x84, 0x88, 0x81, 0x84, 0x8a, 0x88, 0x8a,
+	  0x91, 0x84, 0xb1, 0xae, 0x8b, 0xd5, 0xb2, 0xcc, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
+	  0x85, 0x86, 0x8a, 0x8a, 0x84, 0x87, 0x81, 0x84, 0x8a, 0x87, 0x8a,
+	  0x91, 0x85, 0xae, 0xac, 0x8a, 0xc3, 0xa3, 0xc0, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x85, 0x85,
+	  0x86, 0x85, 0x88, 0x89, 0x84, 0x89, 0x82, 0x84, 0x87, 0x85, 0x8b,
+	  0x91, 0x88, 0xad, 0xab, 0x8a, 0xb7, 0x9b, 0xb6, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
+	  0x85, 0x86, 0x89, 0x8a, 0x84, 0x89, 0x83, 0x83, 0x86, 0x84, 0x8b,
+	  0x90, 0x84, 0xb0, 0xae, 0x8b, 0xce, 0xad, 0xc8, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
+	  0x85, 0x87, 0x89, 0x8a, 0x83, 0x87, 0x82, 0x85, 0x88, 0x87, 0x89,
+	  0x8f, 0x84, 0xac, 0xaa, 0x89, 0xb1, 0x98, 0xaf, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
+	  0x85, 0x86, 0x88, 0x89, 0x84, 0x88, 0x83, 0x82, 0x85, 0x84, 0x8c,
+	  0x91, 0x86, 0xac, 0xaa, 0x89, 0xc2, 0xa5, 0xbd, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
+	  0x85, 0x87, 0x89, 0x8a, 0x83, 0x87, 0x82, 0x85, 0x88, 0x87, 0x88,
+	  0x8b, 0x82, 0xad, 0xaa, 0x8a, 0xc2, 0xa5, 0xbd, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
+	  0x85, 0x86, 0x87, 0x89, 0x84, 0x88, 0x83, 0x82, 0x85, 0x84, 0x8a,
+	  0x8e, 0x84, 0xae, 0xac, 0x89, 0xda, 0xb7, 0xd0, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
+	  0x85, 0x86, 0x87, 0x89, 0x84, 0x88, 0x83, 0x80, 0x83, 0x82, 0x8b,
+	  0x8e, 0x85, 0xac, 0xaa, 0x89, 0xc8, 0xaa, 0xc1, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
+	  0x85, 0x86, 0x87, 0x89, 0x81, 0x85, 0x81, 0x84, 0x86, 0x84, 0x8c,
+	  0x8c, 0x84, 0xa9, 0xa8, 0x87, 0xa3, 0x92, 0xa1, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
+	  0x85, 0x86, 0x87, 0x89, 0x84, 0x86, 0x83, 0x80, 0x83, 0x81, 0x8c,
+	  0x8d, 0x84, 0xaa, 0xaa, 0x89, 0xce, 0xaf, 0xc5, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
+	  0x85, 0x86, 0x87, 0x89, 0x81, 0x83, 0x80, 0x83, 0x85, 0x85, 0x8c,
+	  0x8c, 0x84, 0xa8, 0xa8, 0x88, 0xb5, 0x9f, 0xb0, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
+	  0x86, 0x86, 0x87, 0x88, 0x81, 0x83, 0x80, 0x83, 0x85, 0x85, 0x8c,
+	  0x8b, 0x84, 0xab, 0xa8, 0x86, 0xd4, 0xb4, 0xc9, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
+	  0x86, 0x86, 0x87, 0x88, 0x81, 0x83, 0x80, 0x84, 0x84, 0x85, 0x8b,
+	  0x8a, 0x83, 0xa6, 0xa5, 0x84, 0xbb, 0xa4, 0xb3, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
+	  0x86, 0x85, 0x86, 0x86, 0x82, 0x85, 0x81, 0x82, 0x83, 0x84, 0x8e,
+	  0x8b, 0x83, 0xa4, 0xa3, 0x8a, 0xa1, 0x93, 0x9d, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
+	  0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x82, 0x82, 0x84, 0x8e,
+	  0x8b, 0x83, 0xa4, 0xa2, 0x86, 0xc1, 0xa9, 0xb7, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
+	  0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x82, 0x82, 0x84, 0x8d,
+	  0x89, 0x82, 0xa2, 0xa1, 0x84, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
+	  0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x83, 0x83, 0x85, 0x8c,
+	  0x87, 0x7f, 0xa2, 0x9d, 0x88, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xbb, 0x00, 0xc5, 0x00, 0xb4, 0x87, 0x86, 0x86, 0x84, 0x83,
+	  0x86, 0x87, 0x87, 0x87, 0x80, 0x82, 0x7f, 0x86, 0x86, 0x88, 0x8a,
+	  0x84, 0x7e, 0x9d, 0x9c, 0x82, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xbd, 0x00, 0xc7, 0x00, 0xb7, 0x87, 0x85, 0x85, 0x84, 0x83,
+	  0x86, 0x86, 0x86, 0x88, 0x81, 0x83, 0x80, 0x83, 0x84, 0x85, 0x8a,
+	  0x85, 0x7e, 0x9c, 0x9b, 0x85, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xc0, 0x00, 0xca, 0x00, 0xbb, 0x87, 0x86, 0x85, 0x83, 0x83,
+	  0x85, 0x86, 0x86, 0x88, 0x81, 0x83, 0x80, 0x84, 0x85, 0x86, 0x89,
+	  0x83, 0x7d, 0x9c, 0x99, 0x87, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xc4, 0x00, 0xcd, 0x00, 0xbe, 0x87, 0x86, 0x85, 0x83, 0x83,
+	  0x86, 0x85, 0x85, 0x87, 0x81, 0x82, 0x80, 0x82, 0x82, 0x83, 0x8a,
+	  0x85, 0x7f, 0x9f, 0x9b, 0x86, 0xb4, 0xa1, 0xac, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xc7, 0x00, 0xd0, 0x00, 0xc2, 0x87, 0x85, 0x85, 0x83, 0x82,
+	  0x85, 0x85, 0x85, 0x86, 0x82, 0x83, 0x80, 0x82, 0x82, 0x84, 0x87,
+	  0x86, 0x80, 0x9e, 0x9a, 0x87, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xca, 0x00, 0xd2, 0x00, 0xc5, 0x87, 0x85, 0x84, 0x82, 0x82,
+	  0x84, 0x85, 0x85, 0x86, 0x81, 0x82, 0x7f, 0x82, 0x82, 0x84, 0x88,
+	  0x86, 0x81, 0x9d, 0x98, 0x86, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xce, 0x00, 0xd6, 0x00, 0xca, 0x86, 0x85, 0x84, 0x83, 0x83,
+	  0x85, 0x84, 0x84, 0x85, 0x81, 0x82, 0x80, 0x81, 0x81, 0x82, 0x89,
+	  0x86, 0x81, 0x9c, 0x97, 0x86, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xd1, 0x00, 0xd9, 0x00, 0xce, 0x86, 0x84, 0x83, 0x83, 0x82,
+	  0x85, 0x85, 0x85, 0x86, 0x81, 0x83, 0x81, 0x82, 0x82, 0x83, 0x86,
+	  0x83, 0x7f, 0x99, 0x95, 0x86, 0xbb, 0xa4, 0xb3, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xd4, 0x00, 0xdb, 0x00, 0xd1, 0x86, 0x85, 0x83, 0x83, 0x82,
+	  0x85, 0x84, 0x84, 0x85, 0x80, 0x83, 0x82, 0x80, 0x80, 0x81, 0x87,
+	  0x84, 0x81, 0x98, 0x93, 0x85, 0xae, 0x9c, 0xa8, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xd8, 0x00, 0xde, 0x00, 0xd6, 0x86, 0x84, 0x83, 0x81, 0x81,
+	  0x83, 0x85, 0x85, 0x85, 0x82, 0x83, 0x81, 0x81, 0x81, 0x83, 0x86,
+	  0x84, 0x80, 0x98, 0x91, 0x85, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xdc, 0x00, 0xe2, 0x00, 0xda, 0x85, 0x84, 0x83, 0x82, 0x82,
+	  0x84, 0x84, 0x84, 0x85, 0x81, 0x82, 0x82, 0x80, 0x80, 0x81, 0x83,
+	  0x82, 0x7f, 0x99, 0x93, 0x86, 0x94, 0x8b, 0x92, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xdf, 0x00, 0xe5, 0x00, 0xde, 0x85, 0x84, 0x82, 0x82, 0x82,
+	  0x84, 0x83, 0x83, 0x84, 0x81, 0x81, 0x80, 0x83, 0x82, 0x84, 0x82,
+	  0x81, 0x7f, 0x99, 0x92, 0x86, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
+	  0x82, 0x83, 0x83, 0x84, 0x80, 0x81, 0x80, 0x83, 0x83, 0x84, 0x80,
+	  0x81, 0x7c, 0x99, 0x92, 0x87, 0xa1, 0x93, 0x9d, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x85, 0x84, 0x83, 0x81, 0x81,
+	  0x82, 0x82, 0x82, 0x83, 0x80, 0x81, 0x80, 0x81, 0x80, 0x82, 0x83,
+	  0x82, 0x80, 0x91, 0x8d, 0x83, 0x9a, 0x90, 0x96, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
+	  0x82, 0x83, 0x83, 0x84, 0x80, 0x81, 0x80, 0x81, 0x80, 0x82, 0x83,
+	  0x81, 0x7f, 0x91, 0x8c, 0x82, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
+	  0x82, 0x83, 0x83, 0x83, 0x82, 0x82, 0x81, 0x81, 0x80, 0x82, 0x82,
+	  0x82, 0x7f, 0x94, 0x89, 0x84, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
+	  0x82, 0x83, 0x83, 0x83, 0x82, 0x82, 0x81, 0x81, 0x80, 0x82, 0x83,
+	  0x82, 0x7f, 0x91, 0x85, 0x81, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
+	  0x82, 0x83, 0x83, 0x83, 0x80, 0x80, 0x7f, 0x83, 0x82, 0x84, 0x83,
+	  0x82, 0x7f, 0x90, 0x84, 0x81, 0x9a, 0x90, 0x96, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x80, 0x80,
+	  0x82, 0x83, 0x83, 0x83, 0x80, 0x80, 0x7f, 0x80, 0x80, 0x81, 0x81,
+	  0x82, 0x83, 0x7e, 0x80, 0x7c, 0xa4, 0x97, 0x9f, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xe9, 0x00, 0xec, 0x00, 0xe8, 0x84, 0x83, 0x82, 0x81, 0x81,
+	  0x82, 0x82, 0x82, 0x83, 0x7f, 0x7f, 0x7f, 0x81, 0x80, 0x82, 0x83,
+	  0x83, 0x84, 0x79, 0x7c, 0x79, 0xb1, 0xa0, 0xaa, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xed, 0x00, 0xf0, 0x00, 0xec, 0x83, 0x83, 0x82, 0x80, 0x80,
+	  0x81, 0x82, 0x82, 0x82, 0x7f, 0x7f, 0x7e, 0x81, 0x81, 0x82, 0x80,
+	  0x81, 0x81, 0x84, 0x84, 0x83, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xf1, 0x00, 0xf4, 0x00, 0xf1, 0x83, 0x82, 0x82, 0x80, 0x80,
+	  0x81, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x81, 0x7d,
+	  0x7e, 0x7f, 0x84, 0x84, 0x83, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xf6, 0x00, 0xf7, 0x00, 0xf5, 0x82, 0x82, 0x81, 0x80, 0x80,
+	  0x80, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x7f, 0x7f, 0x7f, 0x82,
+	  0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x00, 0xfa, 0x00, 0xfb, 0x00, 0xfa, 0x81, 0x81, 0x81, 0x80, 0x80,
+	  0x80, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
+	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
+	  0x00, 0x00 },
+	{ 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
+	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
+	  0x00, 0x00 }
+};
+
+unsigned char vint_table[S6E3HA2_VINT_STATUS_MAX] = {
+	0x18, 0x19, 0x1a, 0x1b, 0x1c,
+	0x1d, 0x1e, 0x1f, 0x20, 0x21
+};
+
+struct s6e3ha2 {
+	struct device *dev;
+	struct drm_panel panel;
+	struct backlight_device *bl_dev;
+
+	struct regulator_bulk_data supplies[2];
+	struct gpio_desc *reset_gpio;
+	struct gpio_desc *enable_gpio;
+
+	/* This field is tested by functions directly accessing DSI bus before
+	 * transfer, transfer is skipped if it is set. In case of transfer
+	 * failure or unexpected response the field is set to error value.
+	 * Such construct allows to eliminate many checks in higher level
+	 * functions.
+	 */
+	int error;
+};
+
+static int  s6e3ha2_clear_error(struct s6e3ha2 *ctx)
+{
+	int ret = ctx->error;
+
+	ctx->error = 0;
+	return ret;
+}
+
+static void s6e3ha2_dcs_write(struct s6e3ha2 *ctx, const void *data, size_t len)
+{
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+	ssize_t ret;
+
+	if (ctx->error < 0)
+		return;
+
+	ret = mipi_dsi_dcs_write_buffer(dsi, data, len);
+	if (ret < 0) {
+		dev_err(ctx->dev, "error %zd writing dcs seq: %*ph\n",
+						ret, (int)len, data);
+		ctx->error = ret;
+	}
+}
+
+#define s6e3ha2_dcs_write_seq_static(ctx, seq...) do {	\
+	static const u8 d[] = { seq };			\
+	s6e3ha2_dcs_write(ctx, d, ARRAY_SIZE(d));	\
+} while (0)
+
+static void s6e3ha2_test_key_on_f0(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xf0, 0x5a, 0x5a);
+}
+
+static void s6e3ha2_test_key_off_f0(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xf0, 0xa5, 0xa5);
+}
+
+static void s6e3ha2_test_key_on_fc(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xfc, 0x5a, 0x5a);
+}
+
+static void s6e3ha2_test_key_off_fc(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xfc, 0xa5, 0xa5);
+}
+
+static void s6e3ha2_single_dsi_set(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xf2, 0x67);
+	s6e3ha2_dcs_write_seq_static(ctx, 0xf9, 0x09);
+}
+
+static void s6e3ha2_freq_calibration(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xfd, 0x1c);
+	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x20, 0x39);
+	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0xa0);
+	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x20);
+	s6e3ha2_dcs_write_seq_static(ctx, 0xce, 0x03, 0x3b, 0x12, 0x62,
+		0x40, 0x80, 0xc0, 0x28, 0x28, 0x28, 0x28, 0x39, 0xc5);
+}
+
+static void s6e3ha2_aor_control(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xb2, 0x03, 0x10);
+}
+
+static void s6e3ha2_caps_elvss_set(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xb6, 0x9c, 0x0a);
+}
+
+static void s6e3ha2_acl_off(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0x55, 0x00);
+}
+
+static void s6e3ha2_acl_off_opr(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xb5, 0x40);
+}
+
+static void s6e3ha2_test_global(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xb0, 0x07);
+}
+
+static void s6e3ha2_test(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xb8, 0x19);
+}
+
+static void s6e3ha2_touch_hsync_on1(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx,
+			0xbd, 0x33, 0x11, 0x02, 0x16, 0x02, 0x16);
+}
+
+static void s6e3ha2_pentile_control(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xc0, 0x00, 0x00, 0xd8, 0xd8);
+}
+
+static void s6e3ha2_poc_global(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xb0, 0x20);
+}
+
+static void s6e3ha2_poc_setting(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x08);
+}
+
+static void s6e3ha2_pcd_set_off(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xcc, 0x40, 0x51);
+}
+
+static void s6e3ha2_err_fg_set(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xed, 0x44);
+}
+
+static void s6e3ha2_hbm_off(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0x53, 0x00);
+}
+
+static void s6e3ha2_te_start_setting(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xb9, 0x10, 0x09, 0xff, 0x00, 0x09);
+}
+
+static void s6e3ha2_gamma_update(struct s6e3ha2 *ctx)
+{
+	s6e3ha2_dcs_write_seq_static(ctx, 0xf7, 0x03);
+	ndelay(100); /* need for 100ns delay */
+	s6e3ha2_dcs_write_seq_static(ctx, 0xf7, 0x00);
+}
+
+static int s6e3ha2_get_brightness(struct backlight_device *bl_dev)
+{
+	return bl_dev->props.brightness;
+}
+
+static void s6e3ha2_set_vint(struct s6e3ha2 *ctx)
+{
+	struct backlight_device *bl_dev = ctx->bl_dev;
+	unsigned int brightness = bl_dev->props.brightness;
+	unsigned char data[] = { 0xf4, 0x8b,
+			vint_table[brightness * (S6E3HA2_VINT_STATUS_MAX - 1) /
+			S6E3HA2_MAX_BRIGHTNESS] };
+
+	s6e3ha2_dcs_write(ctx, data, 3);
+}
+
+static unsigned int s6e3ha2_get_brightness_index(unsigned int brightness)
+{
+	return (brightness * (S6E3HA2_NUM_GAMMA_STEPS - 1)) /
+		S6E3HA2_MAX_BRIGHTNESS;
+}
+
+static int s6e3ha2_update_gamma(struct s6e3ha2 *ctx, unsigned int brightness)
+{
+	struct backlight_device *bl_dev = ctx->bl_dev;
+	unsigned int index = s6e3ha2_get_brightness_index(brightness);
+	u8 data[S6E3HA2_GAMMA_CMD_CNT + 1] = { 0xca, };
+
+	memcpy(data + 1, gamma_tbl + index, S6E3HA2_GAMMA_CMD_CNT);
+	s6e3ha2_dcs_write(ctx, data, ARRAY_SIZE(data));
+
+	s6e3ha2_gamma_update(ctx);
+	bl_dev->props.brightness = brightness;
+
+	return 0;
+}
+
+static int s6e3ha2_set_brightness(struct backlight_device *bl_dev)
+{
+	struct s6e3ha2 *ctx = (struct s6e3ha2 *)bl_get_data(bl_dev);
+	unsigned int brightness = bl_dev->props.brightness;
+
+	if (brightness < S6E3HA2_MIN_BRIGHTNESS ||
+		brightness > bl_dev->props.max_brightness) {
+		dev_err(ctx->dev, "Invalid brightness: %u\n", brightness);
+		return -EINVAL;
+	}
+
+	if (bl_dev->props.power > FB_BLANK_NORMAL)
+		return -EPERM;
+
+	s6e3ha2_test_key_on_f0(ctx);
+	s6e3ha2_update_gamma(ctx, brightness);
+	s6e3ha2_aor_control(ctx);
+	s6e3ha2_set_vint(ctx);
+	s6e3ha2_test_key_off_f0(ctx);
+
+	return ctx->error;
+}
+
+static const struct backlight_ops s6e3ha2_bl_ops = {
+	.get_brightness = s6e3ha2_get_brightness,
+	.update_status = s6e3ha2_set_brightness,
+};
+
+static void s6e3ha2_panel_init(struct s6e3ha2 *ctx)
+{
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+
+	mipi_dsi_dcs_exit_sleep_mode(dsi);
+	usleep_range(5000, 6000);
+
+	s6e3ha2_test_key_on_f0(ctx);
+	s6e3ha2_single_dsi_set(ctx);
+	s6e3ha2_test_key_on_fc(ctx);
+	s6e3ha2_freq_calibration(ctx);
+	s6e3ha2_test_key_off_fc(ctx);
+	s6e3ha2_test_key_off_f0(ctx);
+}
+
+static int s6e3ha2_power_off(struct s6e3ha2 *ctx)
+{
+	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static int s6e3ha2_disable(struct drm_panel *panel)
+{
+	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+
+	mipi_dsi_dcs_enter_sleep_mode(dsi);
+	if (ctx->error != 0)
+		goto err;
+
+	mipi_dsi_dcs_set_display_off(dsi);
+	if (ctx->error != 0)
+		goto err;
+
+	msleep(40);
+	ctx->bl_dev->props.power = FB_BLANK_NORMAL;
+
+	return 0;
+err:
+	return ctx->error;
+}
+
+static int s6e3ha2_unprepare(struct drm_panel *panel)
+{
+	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
+	int ret;
+
+	ret = s6e3ha2_clear_error(ctx);
+	if (!ret)
+		ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
+
+	return s6e3ha2_power_off(ctx);
+}
+
+static int s6e3ha2_power_on(struct s6e3ha2 *ctx)
+{
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	msleep(120);
+
+	gpiod_set_value(ctx->enable_gpio, 0);
+	usleep_range(5000, 6000);
+	gpiod_set_value(ctx->enable_gpio, 1);
+
+	gpiod_set_value(ctx->reset_gpio, 1);
+	usleep_range(5000, 6000);
+	gpiod_set_value(ctx->reset_gpio, 0);
+	usleep_range(5000, 6000);
+
+	return 0;
+}
+static int s6e3ha2_prepare(struct drm_panel *panel)
+{
+	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
+	int ret;
+
+	ret = s6e3ha2_power_on(ctx);
+	if (ret < 0)
+		return ret;
+
+	s6e3ha2_panel_init(ctx);
+
+	ret = s6e3ha2_clear_error(ctx);
+	if (ret < 0) {
+		s6e3ha2_power_off(ctx);
+		return ret;
+	}
+
+	ctx->bl_dev->props.power = FB_BLANK_NORMAL;
+
+	return 0;
+}
+
+static int s6e3ha2_enable(struct drm_panel *panel)
+{
+	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+
+	/* common setting */
+	mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+
+	s6e3ha2_test_key_on_f0(ctx);
+	s6e3ha2_test_key_on_fc(ctx);
+	s6e3ha2_touch_hsync_on1(ctx);
+	s6e3ha2_pentile_control(ctx);
+	s6e3ha2_poc_global(ctx);
+	s6e3ha2_poc_setting(ctx);
+	s6e3ha2_test_key_off_fc(ctx);
+
+	/* pcd setting off for TB */
+	s6e3ha2_pcd_set_off(ctx);
+	s6e3ha2_err_fg_set(ctx);
+	s6e3ha2_te_start_setting(ctx);
+
+	/* brightness setting */
+	s6e3ha2_set_brightness(ctx->bl_dev);
+	s6e3ha2_aor_control(ctx);
+	s6e3ha2_caps_elvss_set(ctx);
+	s6e3ha2_gamma_update(ctx);
+	s6e3ha2_acl_off(ctx);
+	s6e3ha2_acl_off_opr(ctx);
+	s6e3ha2_hbm_off(ctx);
+
+	/* elvss temp compensation */
+	s6e3ha2_test_global(ctx);
+	s6e3ha2_test(ctx);
+	s6e3ha2_test_key_off_f0(ctx);
+
+	mipi_dsi_dcs_set_display_on(dsi);
+	if (ctx->error != 0)
+		return ctx->error;
+
+	ctx->bl_dev->props.power = FB_BLANK_UNBLANK;
+
+	return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+	.clock = 14874,
+	.hdisplay = 1440,
+	.hsync_start = 1440 + 1,
+	.hsync_end = 1440 + 1 + 1,
+	.htotal = 1440 + 1 + 1 + 1,
+	.vdisplay = 2560,
+	.vsync_start = 2560 + 1,
+	.vsync_end = 2560 + 1 + 1,
+	.vtotal = 2560 + 1 + 1 + 15,
+	.vrefresh = 60,
+	.flags = 0,
+};
+
+static int s6e3ha2_get_modes(struct drm_panel *panel)
+{
+	struct drm_connector *connector = panel->connector;
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(panel->drm, &default_mode);
+	if (!mode) {
+		DRM_ERROR("failed to create a new display mode\n");
+		DRM_ERROR("failed to add mode %ux%ux@%u\n",
+				default_mode.hdisplay, default_mode.vdisplay,
+				default_mode.vrefresh);
+		return -ENOMEM;
+	}
+
+	drm_mode_set_name(mode);
+
+	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+	drm_mode_probed_add(connector, mode);
+
+	connector->display_info.width_mm = 71;
+	connector->display_info.height_mm = 125;
+
+	return 1;
+}
+
+static const struct drm_panel_funcs s6e3ha2_drm_funcs = {
+	.disable = s6e3ha2_disable,
+	.unprepare = s6e3ha2_unprepare,
+	.prepare = s6e3ha2_prepare,
+	.enable = s6e3ha2_enable,
+	.get_modes = s6e3ha2_get_modes,
+};
+
+static int s6e3ha2_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct s6e3ha2 *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	mipi_dsi_set_drvdata(dsi, ctx);
+
+	ctx->dev = dev;
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS;
+
+	ctx->supplies[0].supply = "vdd3";
+	ctx->supplies[1].supply = "vci";
+
+	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
+				      ctx->supplies);
+	if (ret < 0) {
+		dev_err(dev, "failed to get regulators: %d\n", ret);
+		return ret;
+	}
+
+	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->reset_gpio)) {
+		dev_err(dev, "cannot get reset-gpios %ld\n",
+			PTR_ERR(ctx->reset_gpio));
+		return PTR_ERR(ctx->reset_gpio);
+	}
+
+	ctx->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
+	if (IS_ERR(ctx->enable_gpio)) {
+		dev_err(dev, "cannot get enable-gpios %ld\n",
+			PTR_ERR(ctx->enable_gpio));
+		return PTR_ERR(ctx->enable_gpio);
+	}
+
+	ctx->bl_dev = backlight_device_register("s6e3ha2", dev, ctx,
+						&s6e3ha2_bl_ops, NULL);
+	if (IS_ERR(ctx->bl_dev)) {
+		dev_err(dev, "failed to register backlight device\n");
+		return PTR_ERR(ctx->bl_dev);
+	}
+
+	ctx->bl_dev->props.max_brightness = S6E3HA2_MAX_BRIGHTNESS;
+	ctx->bl_dev->props.brightness = S6E3HA2_DEFAULT_BRIGHTNESS;
+	ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
+
+	drm_panel_init(&ctx->panel);
+	ctx->panel.dev = dev;
+	ctx->panel.funcs = &s6e3ha2_drm_funcs;
+
+	ret = drm_panel_add(&ctx->panel);
+	if (ret < 0)
+		goto unregister_backlight;
+
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0)
+		goto remove_panel;
+
+	return ret;
+
+remove_panel:
+	drm_panel_remove(&ctx->panel);
+
+unregister_backlight:
+	backlight_device_unregister(ctx->bl_dev);
+
+	return ret;
+}
+
+static int s6e3ha2_remove(struct mipi_dsi_device *dsi)
+{
+	struct s6e3ha2 *ctx = mipi_dsi_get_drvdata(dsi);
+
+	mipi_dsi_detach(dsi);
+	drm_panel_remove(&ctx->panel);
+	backlight_device_unregister(ctx->bl_dev);
+
+	return 0;
+}
+
+static const struct of_device_id s6e3ha2_of_match[] = {
+	{ .compatible = "samsung,s6e3ha2" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, s6e3ha2_of_match);
+
+static struct mipi_dsi_driver s6e3ha2_driver = {
+	.probe = s6e3ha2_probe,
+	.remove = s6e3ha2_remove,
+	.driver = {
+		.name = "panel-samsung-s6e3ha2",
+		.of_match_table = s6e3ha2_of_match,
+	},
+};
+module_mipi_dsi_driver(s6e3ha2_driver);
+
+MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>");
+MODULE_AUTHOR("Hyungwon Hwang <human.hwang@samsung.com>");
+MODULE_AUTHOR("Hoegeun Kwon <hoegeun.kwon@samsung.com>");
+MODULE_DESCRIPTION("MIPI-DSI based s6e3ha2 AMOLED Panel Driver");
+MODULE_LICENSE("GPL v2");
-- 
1.9.1

_______________________________________________
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^ permalink raw reply related	[flat|nested] 13+ messages in thread

* Re: [PATCH v5 2/3] drm/panel: Add support for S6E3HA2 panel driver on TM2 board
  2017-01-04  8:15     ` [PATCH v5 2/3] drm/panel: Add support for S6E3HA2 panel driver on TM2 board Hoegeun Kwon
@ 2017-01-04  8:20       ` Chanwoo Choi
  2017-01-04  9:39       ` Andrzej Hajda
  2017-01-04 14:44       ` Rob Herring
  2 siblings, 0 replies; 13+ messages in thread
From: Chanwoo Choi @ 2017-01-04  8:20 UTC (permalink / raw)
  To: Hoegeun Kwon, robh, thierry.reding, airlied, kgene, krzk,
	inki.dae
  Cc: dri-devel, linux-kernel, devicetree, linux-samsung-soc, a.hajda,
	jh80.chung, Donghwa Lee, Hyungwon Hwang

Hi Hoegeun,

I already tested this patch. But this patch does not include my tested-by tag.
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>

Regards,
Chanwoo Choi

On 2017년 01월 04일 17:15, Hoegeun Kwon wrote:
> This patch add support for MIPI-DSI based S6E3HA2 AMOLED panel
> driver. This panel has 1440x2560 resolution in 5.7-inch physical
> panel in the TM2 device.
> 
> Signed-off-by: Donghwa Lee <dh09.lee@samsung.com>
> Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
> ---
>  .../bindings/display/panel/samsung,s6e3ha2.txt     |  40 ++
>  drivers/gpu/drm/panel/Kconfig                      |   6 +
>  drivers/gpu/drm/panel/Makefile                     |   1 +
>  drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c      | 741 +++++++++++++++++++++
>  4 files changed, 788 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
>  create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
> new file mode 100644
> index 0000000..6879f51
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
> @@ -0,0 +1,40 @@
> +Samsung S6E3HA2 5.7" 1440x2560 AMOLED panel
> +
> +Required properties:
> +  - compatible: "samsung,s6e3ha2"
> +  - reg: the virtual channel number of a DSI peripheral
> +  - vdd3-supply: I/O voltage supply
> +  - vci-supply: voltage supply for analog circuits
> +  - reset-gpios: a GPIO spec for the reset pin (active low)
> +  - enable-gpios: a GPIO spec for the panel enable pin (active high)
> +  - te-gpios: a GPIO spec for the tearing effect synchronization signal
> +    gpio pin (active high)
> +
> +The device node can contain one 'port' child node with one child
> +'endpoint' node, according to the bindings defined in [1]. This
> +node should describe panel's video bus.
> +
> +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
> +
> +Example:
> +
> +&dsi {
> +	...
> +
> +	panel@0 {
> +		compatible = "samsung,s6e3ha2";
> +		reg = <0>;
> +		vdd3-supply = <&ldo27_reg>;
> +		vci-supply = <&ldo28_reg>;
> +		reset-gpios = <&gpg0 0 GPIO_ACTIVE_LOW>;
> +		enable-gpios = <&gpf1 5 GPIO_ACTIVE_HIGH>;
> +		te-gpios = <&gpf1 3 GPIO_ACTIVE_HIGH>;
> +
> +		port {
> +			panel_in: endpoint {
> +				remote-endpoint = <&dsi_out>;
> +			};
> +		};
> +	};
> +};
> +
> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> index 62aba97..eea2902 100644
> --- a/drivers/gpu/drm/panel/Kconfig
> +++ b/drivers/gpu/drm/panel/Kconfig
> @@ -52,6 +52,12 @@ config DRM_PANEL_PANASONIC_VVX10F034N00
>  	  WUXGA (1920x1200) Novatek NT1397-based DSI panel as found in some
>  	  Xperia Z2 tablets
>  
> +config DRM_PANEL_SAMSUNG_S6E3HA2
> +	tristate "Samsung S6E3HA2 DSI video mode panel"
> +	depends on OF
> +	depends on  DRM_MIPI_DSI
> +	select VIDEOMODE_HELPERS
> +
>  config DRM_PANEL_SAMSUNG_S6E8AA0
>  	tristate "Samsung S6E8AA0 DSI video mode panel"
>  	depends on OF
> diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
> index a5c7ec0..1d483b0 100644
> --- a/drivers/gpu/drm/panel/Makefile
> +++ b/drivers/gpu/drm/panel/Makefile
> @@ -3,6 +3,7 @@ obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
>  obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
>  obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
>  obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
> +obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
>  obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
>  obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
>  obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o
> diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
> new file mode 100644
> index 0000000..8c5a1c2
> --- /dev/null
> +++ b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
> @@ -0,0 +1,741 @@
> +/*
> + * MIPI-DSI based s6e3ha2 AMOLED 5.7 inch panel driver.
> + *
> + * Copyright (c) 2016 Samsung Electronics Co., Ltd.
> + * Donghwa Lee <dh09.lee@samsung.com>
> + * Hyungwon Hwang <human.hwang@samsung.com>
> + * Hoegeun Kwon <hoegeun.kwon@samsung.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <drm/drmP.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_panel.h>
> +#include <linux/backlight.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/regulator/consumer.h>
> +
> +#define S6E3HA2_MIN_BRIGHTNESS		0
> +#define S6E3HA2_MAX_BRIGHTNESS		100
> +#define S6E3HA2_DEFAULT_BRIGHTNESS	80
> +
> +#define S6E3HA2_NUM_GAMMA_STEPS		46
> +#define S6E3HA2_GAMMA_CMD_CNT		35
> +#define S6E3HA2_VINT_STATUS_MAX		10
> +
> +static const u8 gamma_tbl[S6E3HA2_NUM_GAMMA_STEPS][S6E3HA2_GAMMA_CMD_CNT] = {
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x82, 0x83,
> +	  0x85, 0x88, 0x8b, 0x8b, 0x84, 0x88, 0x82, 0x82, 0x89, 0x86, 0x8c,
> +	  0x94, 0x84, 0xb1, 0xaf, 0x8e, 0xcf, 0xad, 0xc9, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x84, 0x84,
> +	  0x85, 0x87, 0x8b, 0x8a, 0x84, 0x88, 0x82, 0x82, 0x89, 0x86, 0x8a,
> +	  0x93, 0x84, 0xb0, 0xae, 0x8e, 0xc9, 0xa8, 0xc5, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x8a, 0x8a, 0x84, 0x88, 0x81, 0x84, 0x8a, 0x88, 0x8a,
> +	  0x91, 0x84, 0xb1, 0xae, 0x8b, 0xd5, 0xb2, 0xcc, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x8a, 0x8a, 0x84, 0x87, 0x81, 0x84, 0x8a, 0x87, 0x8a,
> +	  0x91, 0x85, 0xae, 0xac, 0x8a, 0xc3, 0xa3, 0xc0, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x85, 0x85,
> +	  0x86, 0x85, 0x88, 0x89, 0x84, 0x89, 0x82, 0x84, 0x87, 0x85, 0x8b,
> +	  0x91, 0x88, 0xad, 0xab, 0x8a, 0xb7, 0x9b, 0xb6, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x89, 0x8a, 0x84, 0x89, 0x83, 0x83, 0x86, 0x84, 0x8b,
> +	  0x90, 0x84, 0xb0, 0xae, 0x8b, 0xce, 0xad, 0xc8, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x87, 0x89, 0x8a, 0x83, 0x87, 0x82, 0x85, 0x88, 0x87, 0x89,
> +	  0x8f, 0x84, 0xac, 0xaa, 0x89, 0xb1, 0x98, 0xaf, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x88, 0x89, 0x84, 0x88, 0x83, 0x82, 0x85, 0x84, 0x8c,
> +	  0x91, 0x86, 0xac, 0xaa, 0x89, 0xc2, 0xa5, 0xbd, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x85, 0x87, 0x89, 0x8a, 0x83, 0x87, 0x82, 0x85, 0x88, 0x87, 0x88,
> +	  0x8b, 0x82, 0xad, 0xaa, 0x8a, 0xc2, 0xa5, 0xbd, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x87, 0x89, 0x84, 0x88, 0x83, 0x82, 0x85, 0x84, 0x8a,
> +	  0x8e, 0x84, 0xae, 0xac, 0x89, 0xda, 0xb7, 0xd0, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x85, 0x86, 0x87, 0x89, 0x84, 0x88, 0x83, 0x80, 0x83, 0x82, 0x8b,
> +	  0x8e, 0x85, 0xac, 0xaa, 0x89, 0xc8, 0xaa, 0xc1, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x85, 0x86, 0x87, 0x89, 0x81, 0x85, 0x81, 0x84, 0x86, 0x84, 0x8c,
> +	  0x8c, 0x84, 0xa9, 0xa8, 0x87, 0xa3, 0x92, 0xa1, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x85, 0x86, 0x87, 0x89, 0x84, 0x86, 0x83, 0x80, 0x83, 0x81, 0x8c,
> +	  0x8d, 0x84, 0xaa, 0xaa, 0x89, 0xce, 0xaf, 0xc5, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x85, 0x86, 0x87, 0x89, 0x81, 0x83, 0x80, 0x83, 0x85, 0x85, 0x8c,
> +	  0x8c, 0x84, 0xa8, 0xa8, 0x88, 0xb5, 0x9f, 0xb0, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x86, 0x86, 0x87, 0x88, 0x81, 0x83, 0x80, 0x83, 0x85, 0x85, 0x8c,
> +	  0x8b, 0x84, 0xab, 0xa8, 0x86, 0xd4, 0xb4, 0xc9, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x86, 0x86, 0x87, 0x88, 0x81, 0x83, 0x80, 0x84, 0x84, 0x85, 0x8b,
> +	  0x8a, 0x83, 0xa6, 0xa5, 0x84, 0xbb, 0xa4, 0xb3, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x86, 0x85, 0x86, 0x86, 0x82, 0x85, 0x81, 0x82, 0x83, 0x84, 0x8e,
> +	  0x8b, 0x83, 0xa4, 0xa3, 0x8a, 0xa1, 0x93, 0x9d, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x82, 0x82, 0x84, 0x8e,
> +	  0x8b, 0x83, 0xa4, 0xa2, 0x86, 0xc1, 0xa9, 0xb7, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x82, 0x82, 0x84, 0x8d,
> +	  0x89, 0x82, 0xa2, 0xa1, 0x84, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x83, 0x83, 0x85, 0x8c,
> +	  0x87, 0x7f, 0xa2, 0x9d, 0x88, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xbb, 0x00, 0xc5, 0x00, 0xb4, 0x87, 0x86, 0x86, 0x84, 0x83,
> +	  0x86, 0x87, 0x87, 0x87, 0x80, 0x82, 0x7f, 0x86, 0x86, 0x88, 0x8a,
> +	  0x84, 0x7e, 0x9d, 0x9c, 0x82, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xbd, 0x00, 0xc7, 0x00, 0xb7, 0x87, 0x85, 0x85, 0x84, 0x83,
> +	  0x86, 0x86, 0x86, 0x88, 0x81, 0x83, 0x80, 0x83, 0x84, 0x85, 0x8a,
> +	  0x85, 0x7e, 0x9c, 0x9b, 0x85, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xc0, 0x00, 0xca, 0x00, 0xbb, 0x87, 0x86, 0x85, 0x83, 0x83,
> +	  0x85, 0x86, 0x86, 0x88, 0x81, 0x83, 0x80, 0x84, 0x85, 0x86, 0x89,
> +	  0x83, 0x7d, 0x9c, 0x99, 0x87, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xc4, 0x00, 0xcd, 0x00, 0xbe, 0x87, 0x86, 0x85, 0x83, 0x83,
> +	  0x86, 0x85, 0x85, 0x87, 0x81, 0x82, 0x80, 0x82, 0x82, 0x83, 0x8a,
> +	  0x85, 0x7f, 0x9f, 0x9b, 0x86, 0xb4, 0xa1, 0xac, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xc7, 0x00, 0xd0, 0x00, 0xc2, 0x87, 0x85, 0x85, 0x83, 0x82,
> +	  0x85, 0x85, 0x85, 0x86, 0x82, 0x83, 0x80, 0x82, 0x82, 0x84, 0x87,
> +	  0x86, 0x80, 0x9e, 0x9a, 0x87, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xca, 0x00, 0xd2, 0x00, 0xc5, 0x87, 0x85, 0x84, 0x82, 0x82,
> +	  0x84, 0x85, 0x85, 0x86, 0x81, 0x82, 0x7f, 0x82, 0x82, 0x84, 0x88,
> +	  0x86, 0x81, 0x9d, 0x98, 0x86, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xce, 0x00, 0xd6, 0x00, 0xca, 0x86, 0x85, 0x84, 0x83, 0x83,
> +	  0x85, 0x84, 0x84, 0x85, 0x81, 0x82, 0x80, 0x81, 0x81, 0x82, 0x89,
> +	  0x86, 0x81, 0x9c, 0x97, 0x86, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xd1, 0x00, 0xd9, 0x00, 0xce, 0x86, 0x84, 0x83, 0x83, 0x82,
> +	  0x85, 0x85, 0x85, 0x86, 0x81, 0x83, 0x81, 0x82, 0x82, 0x83, 0x86,
> +	  0x83, 0x7f, 0x99, 0x95, 0x86, 0xbb, 0xa4, 0xb3, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xd4, 0x00, 0xdb, 0x00, 0xd1, 0x86, 0x85, 0x83, 0x83, 0x82,
> +	  0x85, 0x84, 0x84, 0x85, 0x80, 0x83, 0x82, 0x80, 0x80, 0x81, 0x87,
> +	  0x84, 0x81, 0x98, 0x93, 0x85, 0xae, 0x9c, 0xa8, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xd8, 0x00, 0xde, 0x00, 0xd6, 0x86, 0x84, 0x83, 0x81, 0x81,
> +	  0x83, 0x85, 0x85, 0x85, 0x82, 0x83, 0x81, 0x81, 0x81, 0x83, 0x86,
> +	  0x84, 0x80, 0x98, 0x91, 0x85, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xdc, 0x00, 0xe2, 0x00, 0xda, 0x85, 0x84, 0x83, 0x82, 0x82,
> +	  0x84, 0x84, 0x84, 0x85, 0x81, 0x82, 0x82, 0x80, 0x80, 0x81, 0x83,
> +	  0x82, 0x7f, 0x99, 0x93, 0x86, 0x94, 0x8b, 0x92, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xdf, 0x00, 0xe5, 0x00, 0xde, 0x85, 0x84, 0x82, 0x82, 0x82,
> +	  0x84, 0x83, 0x83, 0x84, 0x81, 0x81, 0x80, 0x83, 0x82, 0x84, 0x82,
> +	  0x81, 0x7f, 0x99, 0x92, 0x86, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x83, 0x83, 0x84, 0x80, 0x81, 0x80, 0x83, 0x83, 0x84, 0x80,
> +	  0x81, 0x7c, 0x99, 0x92, 0x87, 0xa1, 0x93, 0x9d, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x85, 0x84, 0x83, 0x81, 0x81,
> +	  0x82, 0x82, 0x82, 0x83, 0x80, 0x81, 0x80, 0x81, 0x80, 0x82, 0x83,
> +	  0x82, 0x80, 0x91, 0x8d, 0x83, 0x9a, 0x90, 0x96, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x83, 0x83, 0x84, 0x80, 0x81, 0x80, 0x81, 0x80, 0x82, 0x83,
> +	  0x81, 0x7f, 0x91, 0x8c, 0x82, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x83, 0x83, 0x83, 0x82, 0x82, 0x81, 0x81, 0x80, 0x82, 0x82,
> +	  0x82, 0x7f, 0x94, 0x89, 0x84, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x83, 0x83, 0x83, 0x82, 0x82, 0x81, 0x81, 0x80, 0x82, 0x83,
> +	  0x82, 0x7f, 0x91, 0x85, 0x81, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x83, 0x83, 0x83, 0x80, 0x80, 0x7f, 0x83, 0x82, 0x84, 0x83,
> +	  0x82, 0x7f, 0x90, 0x84, 0x81, 0x9a, 0x90, 0x96, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x80, 0x80,
> +	  0x82, 0x83, 0x83, 0x83, 0x80, 0x80, 0x7f, 0x80, 0x80, 0x81, 0x81,
> +	  0x82, 0x83, 0x7e, 0x80, 0x7c, 0xa4, 0x97, 0x9f, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe9, 0x00, 0xec, 0x00, 0xe8, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x82, 0x82, 0x83, 0x7f, 0x7f, 0x7f, 0x81, 0x80, 0x82, 0x83,
> +	  0x83, 0x84, 0x79, 0x7c, 0x79, 0xb1, 0xa0, 0xaa, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xed, 0x00, 0xf0, 0x00, 0xec, 0x83, 0x83, 0x82, 0x80, 0x80,
> +	  0x81, 0x82, 0x82, 0x82, 0x7f, 0x7f, 0x7e, 0x81, 0x81, 0x82, 0x80,
> +	  0x81, 0x81, 0x84, 0x84, 0x83, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xf1, 0x00, 0xf4, 0x00, 0xf1, 0x83, 0x82, 0x82, 0x80, 0x80,
> +	  0x81, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x81, 0x7d,
> +	  0x7e, 0x7f, 0x84, 0x84, 0x83, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xf6, 0x00, 0xf7, 0x00, 0xf5, 0x82, 0x82, 0x81, 0x80, 0x80,
> +	  0x80, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x7f, 0x7f, 0x7f, 0x82,
> +	  0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xfa, 0x00, 0xfb, 0x00, 0xfa, 0x81, 0x81, 0x81, 0x80, 0x80,
> +	  0x80, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
> +	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
> +	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
> +	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
> +	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
> +	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 }
> +};
> +
> +unsigned char vint_table[S6E3HA2_VINT_STATUS_MAX] = {
> +	0x18, 0x19, 0x1a, 0x1b, 0x1c,
> +	0x1d, 0x1e, 0x1f, 0x20, 0x21
> +};
> +
> +struct s6e3ha2 {
> +	struct device *dev;
> +	struct drm_panel panel;
> +	struct backlight_device *bl_dev;
> +
> +	struct regulator_bulk_data supplies[2];
> +	struct gpio_desc *reset_gpio;
> +	struct gpio_desc *enable_gpio;
> +
> +	/* This field is tested by functions directly accessing DSI bus before
> +	 * transfer, transfer is skipped if it is set. In case of transfer
> +	 * failure or unexpected response the field is set to error value.
> +	 * Such construct allows to eliminate many checks in higher level
> +	 * functions.
> +	 */
> +	int error;
> +};
> +
> +static int  s6e3ha2_clear_error(struct s6e3ha2 *ctx)
> +{
> +	int ret = ctx->error;
> +
> +	ctx->error = 0;
> +	return ret;
> +}
> +
> +static void s6e3ha2_dcs_write(struct s6e3ha2 *ctx, const void *data, size_t len)
> +{
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +	ssize_t ret;
> +
> +	if (ctx->error < 0)
> +		return;
> +
> +	ret = mipi_dsi_dcs_write_buffer(dsi, data, len);
> +	if (ret < 0) {
> +		dev_err(ctx->dev, "error %zd writing dcs seq: %*ph\n",
> +						ret, (int)len, data);
> +		ctx->error = ret;
> +	}
> +}
> +
> +#define s6e3ha2_dcs_write_seq_static(ctx, seq...) do {	\
> +	static const u8 d[] = { seq };			\
> +	s6e3ha2_dcs_write(ctx, d, ARRAY_SIZE(d));	\
> +} while (0)
> +
> +static void s6e3ha2_test_key_on_f0(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf0, 0x5a, 0x5a);
> +}
> +
> +static void s6e3ha2_test_key_off_f0(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf0, 0xa5, 0xa5);
> +}
> +
> +static void s6e3ha2_test_key_on_fc(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfc, 0x5a, 0x5a);
> +}
> +
> +static void s6e3ha2_test_key_off_fc(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfc, 0xa5, 0xa5);
> +}
> +
> +static void s6e3ha2_single_dsi_set(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf2, 0x67);
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf9, 0x09);
> +}
> +
> +static void s6e3ha2_freq_calibration(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfd, 0x1c);
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x20, 0x39);
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0xa0);
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x20);
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xce, 0x03, 0x3b, 0x12, 0x62,
> +		0x40, 0x80, 0xc0, 0x28, 0x28, 0x28, 0x28, 0x39, 0xc5);
> +}
> +
> +static void s6e3ha2_aor_control(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb2, 0x03, 0x10);
> +}
> +
> +static void s6e3ha2_caps_elvss_set(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb6, 0x9c, 0x0a);
> +}
> +
> +static void s6e3ha2_acl_off(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0x55, 0x00);
> +}
> +
> +static void s6e3ha2_acl_off_opr(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb5, 0x40);
> +}
> +
> +static void s6e3ha2_test_global(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb0, 0x07);
> +}
> +
> +static void s6e3ha2_test(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb8, 0x19);
> +}
> +
> +static void s6e3ha2_touch_hsync_on1(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx,
> +			0xbd, 0x33, 0x11, 0x02, 0x16, 0x02, 0x16);
> +}
> +
> +static void s6e3ha2_pentile_control(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xc0, 0x00, 0x00, 0xd8, 0xd8);
> +}
> +
> +static void s6e3ha2_poc_global(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb0, 0x20);
> +}
> +
> +static void s6e3ha2_poc_setting(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x08);
> +}
> +
> +static void s6e3ha2_pcd_set_off(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xcc, 0x40, 0x51);
> +}
> +
> +static void s6e3ha2_err_fg_set(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xed, 0x44);
> +}
> +
> +static void s6e3ha2_hbm_off(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0x53, 0x00);
> +}
> +
> +static void s6e3ha2_te_start_setting(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb9, 0x10, 0x09, 0xff, 0x00, 0x09);
> +}
> +
> +static void s6e3ha2_gamma_update(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf7, 0x03);
> +	ndelay(100); /* need for 100ns delay */
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf7, 0x00);
> +}
> +
> +static int s6e3ha2_get_brightness(struct backlight_device *bl_dev)
> +{
> +	return bl_dev->props.brightness;
> +}
> +
> +static void s6e3ha2_set_vint(struct s6e3ha2 *ctx)
> +{
> +	struct backlight_device *bl_dev = ctx->bl_dev;
> +	unsigned int brightness = bl_dev->props.brightness;
> +	unsigned char data[] = { 0xf4, 0x8b,
> +			vint_table[brightness * (S6E3HA2_VINT_STATUS_MAX - 1) /
> +			S6E3HA2_MAX_BRIGHTNESS] };
> +
> +	s6e3ha2_dcs_write(ctx, data, 3);
> +}
> +
> +static unsigned int s6e3ha2_get_brightness_index(unsigned int brightness)
> +{
> +	return (brightness * (S6E3HA2_NUM_GAMMA_STEPS - 1)) /
> +		S6E3HA2_MAX_BRIGHTNESS;
> +}
> +
> +static int s6e3ha2_update_gamma(struct s6e3ha2 *ctx, unsigned int brightness)
> +{
> +	struct backlight_device *bl_dev = ctx->bl_dev;
> +	unsigned int index = s6e3ha2_get_brightness_index(brightness);
> +	u8 data[S6E3HA2_GAMMA_CMD_CNT + 1] = { 0xca, };
> +
> +	memcpy(data + 1, gamma_tbl + index, S6E3HA2_GAMMA_CMD_CNT);
> +	s6e3ha2_dcs_write(ctx, data, ARRAY_SIZE(data));
> +
> +	s6e3ha2_gamma_update(ctx);
> +	bl_dev->props.brightness = brightness;
> +
> +	return 0;
> +}
> +
> +static int s6e3ha2_set_brightness(struct backlight_device *bl_dev)
> +{
> +	struct s6e3ha2 *ctx = (struct s6e3ha2 *)bl_get_data(bl_dev);
> +	unsigned int brightness = bl_dev->props.brightness;
> +
> +	if (brightness < S6E3HA2_MIN_BRIGHTNESS ||
> +		brightness > bl_dev->props.max_brightness) {
> +		dev_err(ctx->dev, "Invalid brightness: %u\n", brightness);
> +		return -EINVAL;
> +	}
> +
> +	if (bl_dev->props.power > FB_BLANK_NORMAL)
> +		return -EPERM;
> +
> +	s6e3ha2_test_key_on_f0(ctx);
> +	s6e3ha2_update_gamma(ctx, brightness);
> +	s6e3ha2_aor_control(ctx);
> +	s6e3ha2_set_vint(ctx);
> +	s6e3ha2_test_key_off_f0(ctx);
> +
> +	return ctx->error;
> +}
> +
> +static const struct backlight_ops s6e3ha2_bl_ops = {
> +	.get_brightness = s6e3ha2_get_brightness,
> +	.update_status = s6e3ha2_set_brightness,
> +};
> +
> +static void s6e3ha2_panel_init(struct s6e3ha2 *ctx)
> +{
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +
> +	mipi_dsi_dcs_exit_sleep_mode(dsi);
> +	usleep_range(5000, 6000);
> +
> +	s6e3ha2_test_key_on_f0(ctx);
> +	s6e3ha2_single_dsi_set(ctx);
> +	s6e3ha2_test_key_on_fc(ctx);
> +	s6e3ha2_freq_calibration(ctx);
> +	s6e3ha2_test_key_off_fc(ctx);
> +	s6e3ha2_test_key_off_f0(ctx);
> +}
> +
> +static int s6e3ha2_power_off(struct s6e3ha2 *ctx)
> +{
> +	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
> +}
> +
> +static int s6e3ha2_disable(struct drm_panel *panel)
> +{
> +	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +
> +	mipi_dsi_dcs_enter_sleep_mode(dsi);
> +	if (ctx->error != 0)
> +		goto err;
> +
> +	mipi_dsi_dcs_set_display_off(dsi);
> +	if (ctx->error != 0)
> +		goto err;
> +
> +	msleep(40);
> +	ctx->bl_dev->props.power = FB_BLANK_NORMAL;
> +
> +	return 0;
> +err:
> +	return ctx->error;
> +}
> +
> +static int s6e3ha2_unprepare(struct drm_panel *panel)
> +{
> +	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> +	int ret;
> +
> +	ret = s6e3ha2_clear_error(ctx);
> +	if (!ret)
> +		ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
> +
> +	return s6e3ha2_power_off(ctx);
> +}
> +
> +static int s6e3ha2_power_on(struct s6e3ha2 *ctx)
> +{
> +	int ret;
> +
> +	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
> +	if (ret < 0)
> +		return ret;
> +
> +	msleep(120);
> +
> +	gpiod_set_value(ctx->enable_gpio, 0);
> +	usleep_range(5000, 6000);
> +	gpiod_set_value(ctx->enable_gpio, 1);
> +
> +	gpiod_set_value(ctx->reset_gpio, 1);
> +	usleep_range(5000, 6000);
> +	gpiod_set_value(ctx->reset_gpio, 0);
> +	usleep_range(5000, 6000);
> +
> +	return 0;
> +}
> +static int s6e3ha2_prepare(struct drm_panel *panel)
> +{
> +	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> +	int ret;
> +
> +	ret = s6e3ha2_power_on(ctx);
> +	if (ret < 0)
> +		return ret;
> +
> +	s6e3ha2_panel_init(ctx);
> +
> +	ret = s6e3ha2_clear_error(ctx);
> +	if (ret < 0) {
> +		s6e3ha2_power_off(ctx);
> +		return ret;
> +	}
> +
> +	ctx->bl_dev->props.power = FB_BLANK_NORMAL;
> +
> +	return 0;
> +}
> +
> +static int s6e3ha2_enable(struct drm_panel *panel)
> +{
> +	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +
> +	/* common setting */
> +	mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
> +
> +	s6e3ha2_test_key_on_f0(ctx);
> +	s6e3ha2_test_key_on_fc(ctx);
> +	s6e3ha2_touch_hsync_on1(ctx);
> +	s6e3ha2_pentile_control(ctx);
> +	s6e3ha2_poc_global(ctx);
> +	s6e3ha2_poc_setting(ctx);
> +	s6e3ha2_test_key_off_fc(ctx);
> +
> +	/* pcd setting off for TB */
> +	s6e3ha2_pcd_set_off(ctx);
> +	s6e3ha2_err_fg_set(ctx);
> +	s6e3ha2_te_start_setting(ctx);
> +
> +	/* brightness setting */
> +	s6e3ha2_set_brightness(ctx->bl_dev);
> +	s6e3ha2_aor_control(ctx);
> +	s6e3ha2_caps_elvss_set(ctx);
> +	s6e3ha2_gamma_update(ctx);
> +	s6e3ha2_acl_off(ctx);
> +	s6e3ha2_acl_off_opr(ctx);
> +	s6e3ha2_hbm_off(ctx);
> +
> +	/* elvss temp compensation */
> +	s6e3ha2_test_global(ctx);
> +	s6e3ha2_test(ctx);
> +	s6e3ha2_test_key_off_f0(ctx);
> +
> +	mipi_dsi_dcs_set_display_on(dsi);
> +	if (ctx->error != 0)
> +		return ctx->error;
> +
> +	ctx->bl_dev->props.power = FB_BLANK_UNBLANK;
> +
> +	return 0;
> +}
> +
> +static const struct drm_display_mode default_mode = {
> +	.clock = 14874,
> +	.hdisplay = 1440,
> +	.hsync_start = 1440 + 1,
> +	.hsync_end = 1440 + 1 + 1,
> +	.htotal = 1440 + 1 + 1 + 1,
> +	.vdisplay = 2560,
> +	.vsync_start = 2560 + 1,
> +	.vsync_end = 2560 + 1 + 1,
> +	.vtotal = 2560 + 1 + 1 + 15,
> +	.vrefresh = 60,
> +	.flags = 0,
> +};
> +
> +static int s6e3ha2_get_modes(struct drm_panel *panel)
> +{
> +	struct drm_connector *connector = panel->connector;
> +	struct drm_display_mode *mode;
> +
> +	mode = drm_mode_duplicate(panel->drm, &default_mode);
> +	if (!mode) {
> +		DRM_ERROR("failed to create a new display mode\n");
> +		DRM_ERROR("failed to add mode %ux%ux@%u\n",
> +				default_mode.hdisplay, default_mode.vdisplay,
> +				default_mode.vrefresh);
> +		return -ENOMEM;
> +	}
> +
> +	drm_mode_set_name(mode);
> +
> +	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> +	drm_mode_probed_add(connector, mode);
> +
> +	connector->display_info.width_mm = 71;
> +	connector->display_info.height_mm = 125;
> +
> +	return 1;
> +}
> +
> +static const struct drm_panel_funcs s6e3ha2_drm_funcs = {
> +	.disable = s6e3ha2_disable,
> +	.unprepare = s6e3ha2_unprepare,
> +	.prepare = s6e3ha2_prepare,
> +	.enable = s6e3ha2_enable,
> +	.get_modes = s6e3ha2_get_modes,
> +};
> +
> +static int s6e3ha2_probe(struct mipi_dsi_device *dsi)
> +{
> +	struct device *dev = &dsi->dev;
> +	struct s6e3ha2 *ctx;
> +	int ret;
> +
> +	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
> +	if (!ctx)
> +		return -ENOMEM;
> +
> +	mipi_dsi_set_drvdata(dsi, ctx);
> +
> +	ctx->dev = dev;
> +
> +	dsi->lanes = 4;
> +	dsi->format = MIPI_DSI_FMT_RGB888;
> +	dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS;
> +
> +	ctx->supplies[0].supply = "vdd3";
> +	ctx->supplies[1].supply = "vci";
> +
> +	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
> +				      ctx->supplies);
> +	if (ret < 0) {
> +		dev_err(dev, "failed to get regulators: %d\n", ret);
> +		return ret;
> +	}
> +
> +	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
> +	if (IS_ERR(ctx->reset_gpio)) {
> +		dev_err(dev, "cannot get reset-gpios %ld\n",
> +			PTR_ERR(ctx->reset_gpio));
> +		return PTR_ERR(ctx->reset_gpio);
> +	}
> +
> +	ctx->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
> +	if (IS_ERR(ctx->enable_gpio)) {
> +		dev_err(dev, "cannot get enable-gpios %ld\n",
> +			PTR_ERR(ctx->enable_gpio));
> +		return PTR_ERR(ctx->enable_gpio);
> +	}
> +
> +	ctx->bl_dev = backlight_device_register("s6e3ha2", dev, ctx,
> +						&s6e3ha2_bl_ops, NULL);
> +	if (IS_ERR(ctx->bl_dev)) {
> +		dev_err(dev, "failed to register backlight device\n");
> +		return PTR_ERR(ctx->bl_dev);
> +	}
> +
> +	ctx->bl_dev->props.max_brightness = S6E3HA2_MAX_BRIGHTNESS;
> +	ctx->bl_dev->props.brightness = S6E3HA2_DEFAULT_BRIGHTNESS;
> +	ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
> +
> +	drm_panel_init(&ctx->panel);
> +	ctx->panel.dev = dev;
> +	ctx->panel.funcs = &s6e3ha2_drm_funcs;
> +
> +	ret = drm_panel_add(&ctx->panel);
> +	if (ret < 0)
> +		goto unregister_backlight;
> +
> +	ret = mipi_dsi_attach(dsi);
> +	if (ret < 0)
> +		goto remove_panel;
> +
> +	return ret;
> +
> +remove_panel:
> +	drm_panel_remove(&ctx->panel);
> +
> +unregister_backlight:
> +	backlight_device_unregister(ctx->bl_dev);
> +
> +	return ret;
> +}
> +
> +static int s6e3ha2_remove(struct mipi_dsi_device *dsi)
> +{
> +	struct s6e3ha2 *ctx = mipi_dsi_get_drvdata(dsi);
> +
> +	mipi_dsi_detach(dsi);
> +	drm_panel_remove(&ctx->panel);
> +	backlight_device_unregister(ctx->bl_dev);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id s6e3ha2_of_match[] = {
> +	{ .compatible = "samsung,s6e3ha2" },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, s6e3ha2_of_match);
> +
> +static struct mipi_dsi_driver s6e3ha2_driver = {
> +	.probe = s6e3ha2_probe,
> +	.remove = s6e3ha2_remove,
> +	.driver = {
> +		.name = "panel-samsung-s6e3ha2",
> +		.of_match_table = s6e3ha2_of_match,
> +	},
> +};
> +module_mipi_dsi_driver(s6e3ha2_driver);
> +
> +MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>");
> +MODULE_AUTHOR("Hyungwon Hwang <human.hwang@samsung.com>");
> +MODULE_AUTHOR("Hoegeun Kwon <hoegeun.kwon@samsung.com>");
> +MODULE_DESCRIPTION("MIPI-DSI based s6e3ha2 AMOLED Panel Driver");
> +MODULE_LICENSE("GPL v2");
> 

^ permalink raw reply	[flat|nested] 13+ messages in thread

* Re: [PATCH v5 2/3] drm/panel: Add support for S6E3HA2 panel driver on TM2 board
  2017-01-04  8:15     ` [PATCH v5 2/3] drm/panel: Add support for S6E3HA2 panel driver on TM2 board Hoegeun Kwon
  2017-01-04  8:20       ` Chanwoo Choi
@ 2017-01-04  9:39       ` Andrzej Hajda
  2017-01-04 14:44       ` Rob Herring
  2 siblings, 0 replies; 13+ messages in thread
From: Andrzej Hajda @ 2017-01-04  9:39 UTC (permalink / raw)
  To: Hoegeun Kwon, robh, thierry.reding, airlied, kgene, krzk,
	inki.dae
  Cc: devicetree, linux-samsung-soc, Donghwa Lee, linux-kernel,
	dri-devel, jh80.chung, cw00.choi, Hyungwon Hwang

On 04.01.2017 09:15, Hoegeun Kwon wrote:
> This patch add support for MIPI-DSI based S6E3HA2 AMOLED panel
> driver. This panel has 1440x2560 resolution in 5.7-inch physical
> panel in the TM2 device.
>
> Signed-off-by: Donghwa Lee <dh09.lee@samsung.com>
> Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
> ---
>  .../bindings/display/panel/samsung,s6e3ha2.txt     |  40 ++
>  drivers/gpu/drm/panel/Kconfig                      |   6 +
>  drivers/gpu/drm/panel/Makefile                     |   1 +
>  drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c      | 741 +++++++++++++++++++++
>  4 files changed, 788 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
>  create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
>
> diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
> new file mode 100644
> index 0000000..6879f51
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
> @@ -0,0 +1,40 @@
> +Samsung S6E3HA2 5.7" 1440x2560 AMOLED panel
> +
> +Required properties:
> +  - compatible: "samsung,s6e3ha2"
> +  - reg: the virtual channel number of a DSI peripheral
> +  - vdd3-supply: I/O voltage supply
> +  - vci-supply: voltage supply for analog circuits
> +  - reset-gpios: a GPIO spec for the reset pin (active low)
> +  - enable-gpios: a GPIO spec for the panel enable pin (active high)
> +  - te-gpios: a GPIO spec for the tearing effect synchronization signal
> +    gpio pin (active high)
> +
> +The device node can contain one 'port' child node with one child
> +'endpoint' node, according to the bindings defined in [1]. This
> +node should describe panel's video bus.
> +
> +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
> +
> +Example:
> +
> +&dsi {
> +	...
> +
> +	panel@0 {
> +		compatible = "samsung,s6e3ha2";
> +		reg = <0>;
> +		vdd3-supply = <&ldo27_reg>;
> +		vci-supply = <&ldo28_reg>;
> +		reset-gpios = <&gpg0 0 GPIO_ACTIVE_LOW>;
> +		enable-gpios = <&gpf1 5 GPIO_ACTIVE_HIGH>;
> +		te-gpios = <&gpf1 3 GPIO_ACTIVE_HIGH>;
> +
> +		port {
> +			panel_in: endpoint {
> +				remote-endpoint = <&dsi_out>;
> +			};
> +		};
> +	};
> +};
> +
> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> index 62aba97..eea2902 100644
> --- a/drivers/gpu/drm/panel/Kconfig
> +++ b/drivers/gpu/drm/panel/Kconfig
> @@ -52,6 +52,12 @@ config DRM_PANEL_PANASONIC_VVX10F034N00
>  	  WUXGA (1920x1200) Novatek NT1397-based DSI panel as found in some
>  	  Xperia Z2 tablets
>  
> +config DRM_PANEL_SAMSUNG_S6E3HA2
> +	tristate "Samsung S6E3HA2 DSI video mode panel"
> +	depends on OF
> +	depends on  DRM_MIPI_DSI

Spare space.

> +	select VIDEOMODE_HELPERS
> +
>  config DRM_PANEL_SAMSUNG_S6E8AA0
>  	tristate "Samsung S6E8AA0 DSI video mode panel"
>  	depends on OF
> diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
> index a5c7ec0..1d483b0 100644
> --- a/drivers/gpu/drm/panel/Makefile
> +++ b/drivers/gpu/drm/panel/Makefile
> @@ -3,6 +3,7 @@ obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
>  obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
>  obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
>  obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
> +obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
>  obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
>  obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
>  obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o
> diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
> new file mode 100644
> index 0000000..8c5a1c2
> --- /dev/null
> +++ b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
> @@ -0,0 +1,741 @@
> +/*
> + * MIPI-DSI based s6e3ha2 AMOLED 5.7 inch panel driver.
> + *
> + * Copyright (c) 2016 Samsung Electronics Co., Ltd.
> + * Donghwa Lee <dh09.lee@samsung.com>
> + * Hyungwon Hwang <human.hwang@samsung.com>
> + * Hoegeun Kwon <hoegeun.kwon@samsung.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <drm/drmP.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_panel.h>
> +#include <linux/backlight.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/regulator/consumer.h>
> +
> +#define S6E3HA2_MIN_BRIGHTNESS		0
> +#define S6E3HA2_MAX_BRIGHTNESS		100
> +#define S6E3HA2_DEFAULT_BRIGHTNESS	80
> +
> +#define S6E3HA2_NUM_GAMMA_STEPS		46
> +#define S6E3HA2_GAMMA_CMD_CNT		35
> +#define S6E3HA2_VINT_STATUS_MAX		10
> +
> +static const u8 gamma_tbl[S6E3HA2_NUM_GAMMA_STEPS][S6E3HA2_GAMMA_CMD_CNT] = {
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x82, 0x83,
> +	  0x85, 0x88, 0x8b, 0x8b, 0x84, 0x88, 0x82, 0x82, 0x89, 0x86, 0x8c,
> +	  0x94, 0x84, 0xb1, 0xaf, 0x8e, 0xcf, 0xad, 0xc9, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x84, 0x84,
> +	  0x85, 0x87, 0x8b, 0x8a, 0x84, 0x88, 0x82, 0x82, 0x89, 0x86, 0x8a,
> +	  0x93, 0x84, 0xb0, 0xae, 0x8e, 0xc9, 0xa8, 0xc5, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x8a, 0x8a, 0x84, 0x88, 0x81, 0x84, 0x8a, 0x88, 0x8a,
> +	  0x91, 0x84, 0xb1, 0xae, 0x8b, 0xd5, 0xb2, 0xcc, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x8a, 0x8a, 0x84, 0x87, 0x81, 0x84, 0x8a, 0x87, 0x8a,
> +	  0x91, 0x85, 0xae, 0xac, 0x8a, 0xc3, 0xa3, 0xc0, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x85, 0x85,
> +	  0x86, 0x85, 0x88, 0x89, 0x84, 0x89, 0x82, 0x84, 0x87, 0x85, 0x8b,
> +	  0x91, 0x88, 0xad, 0xab, 0x8a, 0xb7, 0x9b, 0xb6, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x89, 0x8a, 0x84, 0x89, 0x83, 0x83, 0x86, 0x84, 0x8b,
> +	  0x90, 0x84, 0xb0, 0xae, 0x8b, 0xce, 0xad, 0xc8, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x87, 0x89, 0x8a, 0x83, 0x87, 0x82, 0x85, 0x88, 0x87, 0x89,
> +	  0x8f, 0x84, 0xac, 0xaa, 0x89, 0xb1, 0x98, 0xaf, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x88, 0x89, 0x84, 0x88, 0x83, 0x82, 0x85, 0x84, 0x8c,
> +	  0x91, 0x86, 0xac, 0xaa, 0x89, 0xc2, 0xa5, 0xbd, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x85, 0x87, 0x89, 0x8a, 0x83, 0x87, 0x82, 0x85, 0x88, 0x87, 0x88,
> +	  0x8b, 0x82, 0xad, 0xaa, 0x8a, 0xc2, 0xa5, 0xbd, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x89, 0x87, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x87, 0x89, 0x84, 0x88, 0x83, 0x82, 0x85, 0x84, 0x8a,
> +	  0x8e, 0x84, 0xae, 0xac, 0x89, 0xda, 0xb7, 0xd0, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x85, 0x86, 0x87, 0x89, 0x84, 0x88, 0x83, 0x80, 0x83, 0x82, 0x8b,
> +	  0x8e, 0x85, 0xac, 0xaa, 0x89, 0xc8, 0xaa, 0xc1, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x85, 0x86, 0x87, 0x89, 0x81, 0x85, 0x81, 0x84, 0x86, 0x84, 0x8c,
> +	  0x8c, 0x84, 0xa9, 0xa8, 0x87, 0xa3, 0x92, 0xa1, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x85, 0x86, 0x87, 0x89, 0x84, 0x86, 0x83, 0x80, 0x83, 0x81, 0x8c,
> +	  0x8d, 0x84, 0xaa, 0xaa, 0x89, 0xce, 0xaf, 0xc5, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x85, 0x86, 0x87, 0x89, 0x81, 0x83, 0x80, 0x83, 0x85, 0x85, 0x8c,
> +	  0x8c, 0x84, 0xa8, 0xa8, 0x88, 0xb5, 0x9f, 0xb0, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x86, 0x86, 0x87, 0x88, 0x81, 0x83, 0x80, 0x83, 0x85, 0x85, 0x8c,
> +	  0x8b, 0x84, 0xab, 0xa8, 0x86, 0xd4, 0xb4, 0xc9, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x86, 0x86, 0x87, 0x88, 0x81, 0x83, 0x80, 0x84, 0x84, 0x85, 0x8b,
> +	  0x8a, 0x83, 0xa6, 0xa5, 0x84, 0xbb, 0xa4, 0xb3, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x84, 0x84,
> +	  0x86, 0x85, 0x86, 0x86, 0x82, 0x85, 0x81, 0x82, 0x83, 0x84, 0x8e,
> +	  0x8b, 0x83, 0xa4, 0xa3, 0x8a, 0xa1, 0x93, 0x9d, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x82, 0x82, 0x84, 0x8e,
> +	  0x8b, 0x83, 0xa4, 0xa2, 0x86, 0xc1, 0xa9, 0xb7, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x82, 0x82, 0x84, 0x8d,
> +	  0x89, 0x82, 0xa2, 0xa1, 0x84, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xb8, 0x00, 0xc3, 0x00, 0xb1, 0x88, 0x86, 0x87, 0x83, 0x83,
> +	  0x85, 0x86, 0x87, 0x87, 0x82, 0x85, 0x81, 0x83, 0x83, 0x85, 0x8c,
> +	  0x87, 0x7f, 0xa2, 0x9d, 0x88, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xbb, 0x00, 0xc5, 0x00, 0xb4, 0x87, 0x86, 0x86, 0x84, 0x83,
> +	  0x86, 0x87, 0x87, 0x87, 0x80, 0x82, 0x7f, 0x86, 0x86, 0x88, 0x8a,
> +	  0x84, 0x7e, 0x9d, 0x9c, 0x82, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xbd, 0x00, 0xc7, 0x00, 0xb7, 0x87, 0x85, 0x85, 0x84, 0x83,
> +	  0x86, 0x86, 0x86, 0x88, 0x81, 0x83, 0x80, 0x83, 0x84, 0x85, 0x8a,
> +	  0x85, 0x7e, 0x9c, 0x9b, 0x85, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xc0, 0x00, 0xca, 0x00, 0xbb, 0x87, 0x86, 0x85, 0x83, 0x83,
> +	  0x85, 0x86, 0x86, 0x88, 0x81, 0x83, 0x80, 0x84, 0x85, 0x86, 0x89,
> +	  0x83, 0x7d, 0x9c, 0x99, 0x87, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xc4, 0x00, 0xcd, 0x00, 0xbe, 0x87, 0x86, 0x85, 0x83, 0x83,
> +	  0x86, 0x85, 0x85, 0x87, 0x81, 0x82, 0x80, 0x82, 0x82, 0x83, 0x8a,
> +	  0x85, 0x7f, 0x9f, 0x9b, 0x86, 0xb4, 0xa1, 0xac, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xc7, 0x00, 0xd0, 0x00, 0xc2, 0x87, 0x85, 0x85, 0x83, 0x82,
> +	  0x85, 0x85, 0x85, 0x86, 0x82, 0x83, 0x80, 0x82, 0x82, 0x84, 0x87,
> +	  0x86, 0x80, 0x9e, 0x9a, 0x87, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xca, 0x00, 0xd2, 0x00, 0xc5, 0x87, 0x85, 0x84, 0x82, 0x82,
> +	  0x84, 0x85, 0x85, 0x86, 0x81, 0x82, 0x7f, 0x82, 0x82, 0x84, 0x88,
> +	  0x86, 0x81, 0x9d, 0x98, 0x86, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xce, 0x00, 0xd6, 0x00, 0xca, 0x86, 0x85, 0x84, 0x83, 0x83,
> +	  0x85, 0x84, 0x84, 0x85, 0x81, 0x82, 0x80, 0x81, 0x81, 0x82, 0x89,
> +	  0x86, 0x81, 0x9c, 0x97, 0x86, 0xa7, 0x98, 0xa1, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xd1, 0x00, 0xd9, 0x00, 0xce, 0x86, 0x84, 0x83, 0x83, 0x82,
> +	  0x85, 0x85, 0x85, 0x86, 0x81, 0x83, 0x81, 0x82, 0x82, 0x83, 0x86,
> +	  0x83, 0x7f, 0x99, 0x95, 0x86, 0xbb, 0xa4, 0xb3, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xd4, 0x00, 0xdb, 0x00, 0xd1, 0x86, 0x85, 0x83, 0x83, 0x82,
> +	  0x85, 0x84, 0x84, 0x85, 0x80, 0x83, 0x82, 0x80, 0x80, 0x81, 0x87,
> +	  0x84, 0x81, 0x98, 0x93, 0x85, 0xae, 0x9c, 0xa8, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xd8, 0x00, 0xde, 0x00, 0xd6, 0x86, 0x84, 0x83, 0x81, 0x81,
> +	  0x83, 0x85, 0x85, 0x85, 0x82, 0x83, 0x81, 0x81, 0x81, 0x83, 0x86,
> +	  0x84, 0x80, 0x98, 0x91, 0x85, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xdc, 0x00, 0xe2, 0x00, 0xda, 0x85, 0x84, 0x83, 0x82, 0x82,
> +	  0x84, 0x84, 0x84, 0x85, 0x81, 0x82, 0x82, 0x80, 0x80, 0x81, 0x83,
> +	  0x82, 0x7f, 0x99, 0x93, 0x86, 0x94, 0x8b, 0x92, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xdf, 0x00, 0xe5, 0x00, 0xde, 0x85, 0x84, 0x82, 0x82, 0x82,
> +	  0x84, 0x83, 0x83, 0x84, 0x81, 0x81, 0x80, 0x83, 0x82, 0x84, 0x82,
> +	  0x81, 0x7f, 0x99, 0x92, 0x86, 0x7b, 0x7b, 0x7c, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x83, 0x83, 0x84, 0x80, 0x81, 0x80, 0x83, 0x83, 0x84, 0x80,
> +	  0x81, 0x7c, 0x99, 0x92, 0x87, 0xa1, 0x93, 0x9d, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x85, 0x84, 0x83, 0x81, 0x81,
> +	  0x82, 0x82, 0x82, 0x83, 0x80, 0x81, 0x80, 0x81, 0x80, 0x82, 0x83,
> +	  0x82, 0x80, 0x91, 0x8d, 0x83, 0x9a, 0x90, 0x96, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x83, 0x83, 0x84, 0x80, 0x81, 0x80, 0x81, 0x80, 0x82, 0x83,
> +	  0x81, 0x7f, 0x91, 0x8c, 0x82, 0x8d, 0x88, 0x8b, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x83, 0x83, 0x83, 0x82, 0x82, 0x81, 0x81, 0x80, 0x82, 0x82,
> +	  0x82, 0x7f, 0x94, 0x89, 0x84, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x83, 0x83, 0x83, 0x82, 0x82, 0x81, 0x81, 0x80, 0x82, 0x83,
> +	  0x82, 0x7f, 0x91, 0x85, 0x81, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x83, 0x83, 0x83, 0x80, 0x80, 0x7f, 0x83, 0x82, 0x84, 0x83,
> +	  0x82, 0x7f, 0x90, 0x84, 0x81, 0x9a, 0x90, 0x96, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe4, 0x00, 0xe9, 0x00, 0xe3, 0x84, 0x83, 0x82, 0x80, 0x80,
> +	  0x82, 0x83, 0x83, 0x83, 0x80, 0x80, 0x7f, 0x80, 0x80, 0x81, 0x81,
> +	  0x82, 0x83, 0x7e, 0x80, 0x7c, 0xa4, 0x97, 0x9f, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xe9, 0x00, 0xec, 0x00, 0xe8, 0x84, 0x83, 0x82, 0x81, 0x81,
> +	  0x82, 0x82, 0x82, 0x83, 0x7f, 0x7f, 0x7f, 0x81, 0x80, 0x82, 0x83,
> +	  0x83, 0x84, 0x79, 0x7c, 0x79, 0xb1, 0xa0, 0xaa, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xed, 0x00, 0xf0, 0x00, 0xec, 0x83, 0x83, 0x82, 0x80, 0x80,
> +	  0x81, 0x82, 0x82, 0x82, 0x7f, 0x7f, 0x7e, 0x81, 0x81, 0x82, 0x80,
> +	  0x81, 0x81, 0x84, 0x84, 0x83, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xf1, 0x00, 0xf4, 0x00, 0xf1, 0x83, 0x82, 0x82, 0x80, 0x80,
> +	  0x81, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x81, 0x7d,
> +	  0x7e, 0x7f, 0x84, 0x84, 0x83, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xf6, 0x00, 0xf7, 0x00, 0xf5, 0x82, 0x82, 0x81, 0x80, 0x80,
> +	  0x80, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x7f, 0x7f, 0x7f, 0x82,
> +	  0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x00, 0xfa, 0x00, 0xfb, 0x00, 0xfa, 0x81, 0x81, 0x81, 0x80, 0x80,
> +	  0x80, 0x82, 0x82, 0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
> +	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
> +	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
> +	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 },
> +	{ 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
> +	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
> +	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00,
> +	  0x00, 0x00 }
> +};
> +
> +unsigned char vint_table[S6E3HA2_VINT_STATUS_MAX] = {
> +	0x18, 0x19, 0x1a, 0x1b, 0x1c,
> +	0x1d, 0x1e, 0x1f, 0x20, 0x21
> +};
> +
> +struct s6e3ha2 {
> +	struct device *dev;
> +	struct drm_panel panel;
> +	struct backlight_device *bl_dev;
> +
> +	struct regulator_bulk_data supplies[2];
> +	struct gpio_desc *reset_gpio;
> +	struct gpio_desc *enable_gpio;
> +
> +	/* This field is tested by functions directly accessing DSI bus before
> +	 * transfer, transfer is skipped if it is set. In case of transfer
> +	 * failure or unexpected response the field is set to error value.
> +	 * Such construct allows to eliminate many checks in higher level
> +	 * functions.
> +	 */
> +	int error;
> +};
> +
> +static int  s6e3ha2_clear_error(struct s6e3ha2 *ctx)
> +{
> +	int ret = ctx->error;
> +
> +	ctx->error = 0;
> +	return ret;
> +}
> +
> +static void s6e3ha2_dcs_write(struct s6e3ha2 *ctx, const void *data, size_t len)
> +{
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +	ssize_t ret;
> +
> +	if (ctx->error < 0)
> +		return;
> +
> +	ret = mipi_dsi_dcs_write_buffer(dsi, data, len);
> +	if (ret < 0) {
> +		dev_err(ctx->dev, "error %zd writing dcs seq: %*ph\n",
> +						ret, (int)len, data);
> +		ctx->error = ret;
> +	}
> +}
> +
> +#define s6e3ha2_dcs_write_seq_static(ctx, seq...) do {	\
> +	static const u8 d[] = { seq };			\
> +	s6e3ha2_dcs_write(ctx, d, ARRAY_SIZE(d));	\
> +} while (0)
> +
> +static void s6e3ha2_test_key_on_f0(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf0, 0x5a, 0x5a);
> +}
> +
> +static void s6e3ha2_test_key_off_f0(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf0, 0xa5, 0xa5);
> +}
> +
> +static void s6e3ha2_test_key_on_fc(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfc, 0x5a, 0x5a);
> +}
> +
> +static void s6e3ha2_test_key_off_fc(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfc, 0xa5, 0xa5);
> +}
> +
> +static void s6e3ha2_single_dsi_set(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf2, 0x67);
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf9, 0x09);
> +}
> +
> +static void s6e3ha2_freq_calibration(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfd, 0x1c);
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x20, 0x39);
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0xa0);
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x20);
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xce, 0x03, 0x3b, 0x12, 0x62,
> +		0x40, 0x80, 0xc0, 0x28, 0x28, 0x28, 0x28, 0x39, 0xc5);
> +}
> +
> +static void s6e3ha2_aor_control(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb2, 0x03, 0x10);
> +}
> +
> +static void s6e3ha2_caps_elvss_set(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb6, 0x9c, 0x0a);
> +}
> +
> +static void s6e3ha2_acl_off(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0x55, 0x00);
> +}
> +
> +static void s6e3ha2_acl_off_opr(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb5, 0x40);
> +}
> +
> +static void s6e3ha2_test_global(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb0, 0x07);
> +}
> +
> +static void s6e3ha2_test(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb8, 0x19);
> +}
> +
> +static void s6e3ha2_touch_hsync_on1(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx,
> +			0xbd, 0x33, 0x11, 0x02, 0x16, 0x02, 0x16);
> +}
> +
> +static void s6e3ha2_pentile_control(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xc0, 0x00, 0x00, 0xd8, 0xd8);
> +}
> +
> +static void s6e3ha2_poc_global(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb0, 0x20);
> +}
> +
> +static void s6e3ha2_poc_setting(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xfe, 0x08);
> +}
> +
> +static void s6e3ha2_pcd_set_off(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xcc, 0x40, 0x51);
> +}
> +
> +static void s6e3ha2_err_fg_set(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xed, 0x44);
> +}
> +
> +static void s6e3ha2_hbm_off(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0x53, 0x00);
> +}
> +
> +static void s6e3ha2_te_start_setting(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xb9, 0x10, 0x09, 0xff, 0x00, 0x09);
> +}
> +
> +static void s6e3ha2_gamma_update(struct s6e3ha2 *ctx)
> +{
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf7, 0x03);
> +	ndelay(100); /* need for 100ns delay */
> +	s6e3ha2_dcs_write_seq_static(ctx, 0xf7, 0x00);
> +}
> +
> +static int s6e3ha2_get_brightness(struct backlight_device *bl_dev)
> +{
> +	return bl_dev->props.brightness;
> +}
> +
> +static void s6e3ha2_set_vint(struct s6e3ha2 *ctx)
> +{
> +	struct backlight_device *bl_dev = ctx->bl_dev;
> +	unsigned int brightness = bl_dev->props.brightness;
> +	unsigned char data[] = { 0xf4, 0x8b,
> +			vint_table[brightness * (S6E3HA2_VINT_STATUS_MAX - 1) /
> +			S6E3HA2_MAX_BRIGHTNESS] };
> +
> +	s6e3ha2_dcs_write(ctx, data, 3);

It would be safer/cleaner to use sizeof(data) or ARRAY_SIZE(data)
instead of 3 here.

> +}
> +
> +static unsigned int s6e3ha2_get_brightness_index(unsigned int brightness)
> +{
> +	return (brightness * (S6E3HA2_NUM_GAMMA_STEPS - 1)) /
> +		S6E3HA2_MAX_BRIGHTNESS;
> +}
> +
> +static int s6e3ha2_update_gamma(struct s6e3ha2 *ctx, unsigned int brightness)
> +{
> +	struct backlight_device *bl_dev = ctx->bl_dev;
> +	unsigned int index = s6e3ha2_get_brightness_index(brightness);
> +	u8 data[S6E3HA2_GAMMA_CMD_CNT + 1] = { 0xca, };
> +
> +	memcpy(data + 1, gamma_tbl + index, S6E3HA2_GAMMA_CMD_CNT);
> +	s6e3ha2_dcs_write(ctx, data, ARRAY_SIZE(data));
> +
> +	s6e3ha2_gamma_update(ctx);
> +	bl_dev->props.brightness = brightness;
> +
> +	return 0;
> +}
> +
> +static int s6e3ha2_set_brightness(struct backlight_device *bl_dev)
> +{
> +	struct s6e3ha2 *ctx = (struct s6e3ha2 *)bl_get_data(bl_dev);

I think explicit casting is not necessary here.

> +	unsigned int brightness = bl_dev->props.brightness;
> +
> +	if (brightness < S6E3HA2_MIN_BRIGHTNESS ||
> +		brightness > bl_dev->props.max_brightness) {
> +		dev_err(ctx->dev, "Invalid brightness: %u\n", brightness);
> +		return -EINVAL;
> +	}
> +
> +	if (bl_dev->props.power > FB_BLANK_NORMAL)
> +		return -EPERM;
> +
> +	s6e3ha2_test_key_on_f0(ctx);
> +	s6e3ha2_update_gamma(ctx, brightness);
> +	s6e3ha2_aor_control(ctx);
> +	s6e3ha2_set_vint(ctx);
> +	s6e3ha2_test_key_off_f0(ctx);
> +
> +	return ctx->error;
> +}
> +
> +static const struct backlight_ops s6e3ha2_bl_ops = {
> +	.get_brightness = s6e3ha2_get_brightness,
> +	.update_status = s6e3ha2_set_brightness,
> +};
> +
> +static void s6e3ha2_panel_init(struct s6e3ha2 *ctx)
> +{
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +
> +	mipi_dsi_dcs_exit_sleep_mode(dsi);
> +	usleep_range(5000, 6000);
> +
> +	s6e3ha2_test_key_on_f0(ctx);
> +	s6e3ha2_single_dsi_set(ctx);
> +	s6e3ha2_test_key_on_fc(ctx);
> +	s6e3ha2_freq_calibration(ctx);
> +	s6e3ha2_test_key_off_fc(ctx);
> +	s6e3ha2_test_key_off_f0(ctx);
> +}
> +
> +static int s6e3ha2_power_off(struct s6e3ha2 *ctx)
> +{
> +	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
> +}
> +
> +static int s6e3ha2_disable(struct drm_panel *panel)
> +{
> +	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +
> +	mipi_dsi_dcs_enter_sleep_mode(dsi);
> +	if (ctx->error != 0)
> +		goto err;
> +
> +	mipi_dsi_dcs_set_display_off(dsi);
> +	if (ctx->error != 0)
> +		goto err;

Both mipi* functions are external functions, you should check return
value instead of ctx->error.

> +
> +	msleep(40);
> +	ctx->bl_dev->props.power = FB_BLANK_NORMAL;
> +
> +	return 0;
> +err:
> +	return ctx->error;
> +}
> +
> +static int s6e3ha2_unprepare(struct drm_panel *panel)
> +{
> +	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> +	int ret;
> +
> +	ret = s6e3ha2_clear_error(ctx);
> +	if (!ret)
> +		ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
> +
> +	return s6e3ha2_power_off(ctx);
> +}
> +
> +static int s6e3ha2_power_on(struct s6e3ha2 *ctx)
> +{
> +	int ret;
> +
> +	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
> +	if (ret < 0)
> +		return ret;
> +
> +	msleep(120);
> +
> +	gpiod_set_value(ctx->enable_gpio, 0);
> +	usleep_range(5000, 6000);
> +	gpiod_set_value(ctx->enable_gpio, 1);
> +
> +	gpiod_set_value(ctx->reset_gpio, 1);
> +	usleep_range(5000, 6000);
> +	gpiod_set_value(ctx->reset_gpio, 0);
> +	usleep_range(5000, 6000);
> +
> +	return 0;
> +}
> +static int s6e3ha2_prepare(struct drm_panel *panel)
> +{
> +	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> +	int ret;
> +
> +	ret = s6e3ha2_power_on(ctx);
> +	if (ret < 0)
> +		return ret;
> +
> +	s6e3ha2_panel_init(ctx);
> +
> +	ret = s6e3ha2_clear_error(ctx);
> +	if (ret < 0) {
> +		s6e3ha2_power_off(ctx);
> +		return ret;
> +	}
> +
> +	ctx->bl_dev->props.power = FB_BLANK_NORMAL;
> +
> +	return 0;
> +}
> +
> +static int s6e3ha2_enable(struct drm_panel *panel)
> +{
> +	struct s6e3ha2 *ctx = container_of(panel, struct s6e3ha2, panel);
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +
> +	/* common setting */
> +	mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
> +
> +	s6e3ha2_test_key_on_f0(ctx);
> +	s6e3ha2_test_key_on_fc(ctx);
> +	s6e3ha2_touch_hsync_on1(ctx);
> +	s6e3ha2_pentile_control(ctx);
> +	s6e3ha2_poc_global(ctx);
> +	s6e3ha2_poc_setting(ctx);
> +	s6e3ha2_test_key_off_fc(ctx);
> +
> +	/* pcd setting off for TB */
> +	s6e3ha2_pcd_set_off(ctx);
> +	s6e3ha2_err_fg_set(ctx);
> +	s6e3ha2_te_start_setting(ctx);
> +
> +	/* brightness setting */
> +	s6e3ha2_set_brightness(ctx->bl_dev);
> +	s6e3ha2_aor_control(ctx);
> +	s6e3ha2_caps_elvss_set(ctx);
> +	s6e3ha2_gamma_update(ctx);
> +	s6e3ha2_acl_off(ctx);
> +	s6e3ha2_acl_off_opr(ctx);
> +	s6e3ha2_hbm_off(ctx);
> +
> +	/* elvss temp compensation */
> +	s6e3ha2_test_global(ctx);
> +	s6e3ha2_test(ctx);
> +	s6e3ha2_test_key_off_f0(ctx);
> +
> +	mipi_dsi_dcs_set_display_on(dsi);
> +	if (ctx->error != 0)
> +		return ctx->error;
> +
> +	ctx->bl_dev->props.power = FB_BLANK_UNBLANK;
> +
> +	return 0;
> +}
> +
> +static const struct drm_display_mode default_mode = {
> +	.clock = 14874,
> +	.hdisplay = 1440,
> +	.hsync_start = 1440 + 1,
> +	.hsync_end = 1440 + 1 + 1,
> +	.htotal = 1440 + 1 + 1 + 1,
> +	.vdisplay = 2560,
> +	.vsync_start = 2560 + 1,
> +	.vsync_end = 2560 + 1 + 1,
> +	.vtotal = 2560 + 1 + 1 + 15,
> +	.vrefresh = 60,

Below equation should be true:
clock * 1000 == vtotal * htotal * vrefresh

It is not. I think clock should be adjusted, another thing is that in
case of this panel vrefresh is little below 60Hz,
modetest shows about 59.8, if I remember correctly.
So clock should be 1443*2577*59.8 / 1000 = 222372.


> +	.flags = 0,
> +};
> +
> +static int s6e3ha2_get_modes(struct drm_panel *panel)
> +{
> +	struct drm_connector *connector = panel->connector;
> +	struct drm_display_mode *mode;
> +
> +	mode = drm_mode_duplicate(panel->drm, &default_mode);
> +	if (!mode) {
> +		DRM_ERROR("failed to create a new display mode\n");
> +		DRM_ERROR("failed to add mode %ux%ux@%u\n",
> +				default_mode.hdisplay, default_mode.vdisplay,
> +				default_mode.vrefresh);

I think 1st DRM_ERROR could be dropped.
I think 2nd one also, as allocator will dump stack in case of failure.

Regards
Andrzej


> +		return -ENOMEM;
> +	}
> +
> +	drm_mode_set_name(mode);
> +
> +	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> +	drm_mode_probed_add(connector, mode);
> +
> +	connector->display_info.width_mm = 71;
> +	connector->display_info.height_mm = 125;
> +
> +	return 1;
> +}
> +
> +static const struct drm_panel_funcs s6e3ha2_drm_funcs = {
> +	.disable = s6e3ha2_disable,
> +	.unprepare = s6e3ha2_unprepare,
> +	.prepare = s6e3ha2_prepare,
> +	.enable = s6e3ha2_enable,
> +	.get_modes = s6e3ha2_get_modes,
> +};
> +
> +static int s6e3ha2_probe(struct mipi_dsi_device *dsi)
> +{
> +	struct device *dev = &dsi->dev;
> +	struct s6e3ha2 *ctx;
> +	int ret;
> +
> +	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
> +	if (!ctx)
> +		return -ENOMEM;
> +
> +	mipi_dsi_set_drvdata(dsi, ctx);
> +
> +	ctx->dev = dev;
> +
> +	dsi->lanes = 4;
> +	dsi->format = MIPI_DSI_FMT_RGB888;
> +	dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS;
> +
> +	ctx->supplies[0].supply = "vdd3";
> +	ctx->supplies[1].supply = "vci";
> +
> +	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
> +				      ctx->supplies);
> +	if (ret < 0) {
> +		dev_err(dev, "failed to get regulators: %d\n", ret);
> +		return ret;
> +	}
> +
> +	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
> +	if (IS_ERR(ctx->reset_gpio)) {
> +		dev_err(dev, "cannot get reset-gpios %ld\n",
> +			PTR_ERR(ctx->reset_gpio));
> +		return PTR_ERR(ctx->reset_gpio);
> +	}
> +
> +	ctx->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
> +	if (IS_ERR(ctx->enable_gpio)) {
> +		dev_err(dev, "cannot get enable-gpios %ld\n",
> +			PTR_ERR(ctx->enable_gpio));
> +		return PTR_ERR(ctx->enable_gpio);
> +	}
> +
> +	ctx->bl_dev = backlight_device_register("s6e3ha2", dev, ctx,
> +						&s6e3ha2_bl_ops, NULL);
> +	if (IS_ERR(ctx->bl_dev)) {
> +		dev_err(dev, "failed to register backlight device\n");
> +		return PTR_ERR(ctx->bl_dev);
> +	}
> +
> +	ctx->bl_dev->props.max_brightness = S6E3HA2_MAX_BRIGHTNESS;
> +	ctx->bl_dev->props.brightness = S6E3HA2_DEFAULT_BRIGHTNESS;
> +	ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
> +
> +	drm_panel_init(&ctx->panel);
> +	ctx->panel.dev = dev;
> +	ctx->panel.funcs = &s6e3ha2_drm_funcs;
> +
> +	ret = drm_panel_add(&ctx->panel);
> +	if (ret < 0)
> +		goto unregister_backlight;
> +
> +	ret = mipi_dsi_attach(dsi);
> +	if (ret < 0)
> +		goto remove_panel;
> +
> +	return ret;
> +
> +remove_panel:
> +	drm_panel_remove(&ctx->panel);
> +
> +unregister_backlight:
> +	backlight_device_unregister(ctx->bl_dev);
> +
> +	return ret;
> +}
> +
> +static int s6e3ha2_remove(struct mipi_dsi_device *dsi)
> +{
> +	struct s6e3ha2 *ctx = mipi_dsi_get_drvdata(dsi);
> +
> +	mipi_dsi_detach(dsi);
> +	drm_panel_remove(&ctx->panel);
> +	backlight_device_unregister(ctx->bl_dev);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id s6e3ha2_of_match[] = {
> +	{ .compatible = "samsung,s6e3ha2" },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, s6e3ha2_of_match);
> +
> +static struct mipi_dsi_driver s6e3ha2_driver = {
> +	.probe = s6e3ha2_probe,
> +	.remove = s6e3ha2_remove,
> +	.driver = {
> +		.name = "panel-samsung-s6e3ha2",
> +		.of_match_table = s6e3ha2_of_match,
> +	},
> +};
> +module_mipi_dsi_driver(s6e3ha2_driver);
> +
> +MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>");
> +MODULE_AUTHOR("Hyungwon Hwang <human.hwang@samsung.com>");
> +MODULE_AUTHOR("Hoegeun Kwon <hoegeun.kwon@samsung.com>");
> +MODULE_DESCRIPTION("MIPI-DSI based s6e3ha2 AMOLED Panel Driver");
> +MODULE_LICENSE("GPL v2");


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^ permalink raw reply	[flat|nested] 13+ messages in thread

* Re: [PATCH v5 2/3] drm/panel: Add support for S6E3HA2 panel driver on TM2 board
  2017-01-04  8:15     ` [PATCH v5 2/3] drm/panel: Add support for S6E3HA2 panel driver on TM2 board Hoegeun Kwon
  2017-01-04  8:20       ` Chanwoo Choi
  2017-01-04  9:39       ` Andrzej Hajda
@ 2017-01-04 14:44       ` Rob Herring
  2017-01-05  6:55         ` Andrzej Hajda
  2 siblings, 1 reply; 13+ messages in thread
From: Rob Herring @ 2017-01-04 14:44 UTC (permalink / raw)
  To: Hoegeun Kwon
  Cc: devicetree, krzk, cw00.choi, Donghwa Lee, jh80.chung,
	linux-kernel, dri-devel, linux-samsung-soc, kgene, Hyungwon Hwang

On Wed, Jan 04, 2017 at 05:15:10PM +0900, Hoegeun Kwon wrote:
> This patch add support for MIPI-DSI based S6E3HA2 AMOLED panel
> driver. This panel has 1440x2560 resolution in 5.7-inch physical
> panel in the TM2 device.
> 
> Signed-off-by: Donghwa Lee <dh09.lee@samsung.com>
> Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
> ---
>  .../bindings/display/panel/samsung,s6e3ha2.txt     |  40 ++
>  drivers/gpu/drm/panel/Kconfig                      |   6 +
>  drivers/gpu/drm/panel/Makefile                     |   1 +
>  drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c      | 741 +++++++++++++++++++++
>  4 files changed, 788 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
>  create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
> new file mode 100644
> index 0000000..6879f51
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
> @@ -0,0 +1,40 @@
> +Samsung S6E3HA2 5.7" 1440x2560 AMOLED panel
> +
> +Required properties:
> +  - compatible: "samsung,s6e3ha2"
> +  - reg: the virtual channel number of a DSI peripheral
> +  - vdd3-supply: I/O voltage supply
> +  - vci-supply: voltage supply for analog circuits
> +  - reset-gpios: a GPIO spec for the reset pin (active low)
> +  - enable-gpios: a GPIO spec for the panel enable pin (active high)
> +  - te-gpios: a GPIO spec for the tearing effect synchronization signal
> +    gpio pin (active high)
> +
> +The device node can contain one 'port' child node with one child
> +'endpoint' node, according to the bindings defined in [1]. This
> +node should describe panel's video bus.
> +
> +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
> +
> +Example:
> +
> +&dsi {
> +	...
> +
> +	panel@0 {
> +		compatible = "samsung,s6e3ha2";
> +		reg = <0>;
> +		vdd3-supply = <&ldo27_reg>;
> +		vci-supply = <&ldo28_reg>;
> +		reset-gpios = <&gpg0 0 GPIO_ACTIVE_LOW>;
> +		enable-gpios = <&gpf1 5 GPIO_ACTIVE_HIGH>;
> +		te-gpios = <&gpf1 3 GPIO_ACTIVE_HIGH>;
> +
> +		port {
> +			panel_in: endpoint {
> +				remote-endpoint = <&dsi_out>;

As I said previously, it makes no sense to have a graph to dsi_out it is 
simply the parent node.

> +			};
> +		};
> +	};
> +};
> +
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^ permalink raw reply	[flat|nested] 13+ messages in thread

* Re: [PATCH v5 2/3] drm/panel: Add support for S6E3HA2 panel driver on TM2 board
  2017-01-04 14:44       ` Rob Herring
@ 2017-01-05  6:55         ` Andrzej Hajda
  2017-01-05  7:52           ` Inki Dae
  0 siblings, 1 reply; 13+ messages in thread
From: Andrzej Hajda @ 2017-01-05  6:55 UTC (permalink / raw)
  To: Rob Herring, Hoegeun Kwon
  Cc: devicetree, krzk, cw00.choi, Donghwa Lee, jh80.chung,
	linux-kernel, dri-devel, linux-samsung-soc, kgene, Hyungwon Hwang

On 04.01.2017 15:44, Rob Herring wrote:
> On Wed, Jan 04, 2017 at 05:15:10PM +0900, Hoegeun Kwon wrote:
>> This patch add support for MIPI-DSI based S6E3HA2 AMOLED panel
>> driver. This panel has 1440x2560 resolution in 5.7-inch physical
>> panel in the TM2 device.
>>
>> Signed-off-by: Donghwa Lee <dh09.lee@samsung.com>
>> Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
>> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
>> ---
>>  .../bindings/display/panel/samsung,s6e3ha2.txt     |  40 ++
>>  drivers/gpu/drm/panel/Kconfig                      |   6 +
>>  drivers/gpu/drm/panel/Makefile                     |   1 +
>>  drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c      | 741 +++++++++++++++++++++
>>  4 files changed, 788 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
>>  create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
>>
>> diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
>> new file mode 100644
>> index 0000000..6879f51
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
>> @@ -0,0 +1,40 @@
>> +Samsung S6E3HA2 5.7" 1440x2560 AMOLED panel
>> +
>> +Required properties:
>> +  - compatible: "samsung,s6e3ha2"
>> +  - reg: the virtual channel number of a DSI peripheral
>> +  - vdd3-supply: I/O voltage supply
>> +  - vci-supply: voltage supply for analog circuits
>> +  - reset-gpios: a GPIO spec for the reset pin (active low)
>> +  - enable-gpios: a GPIO spec for the panel enable pin (active high)
>> +  - te-gpios: a GPIO spec for the tearing effect synchronization signal
>> +    gpio pin (active high)
>> +
>> +The device node can contain one 'port' child node with one child
>> +'endpoint' node, according to the bindings defined in [1]. This
>> +node should describe panel's video bus.
>> +
>> +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
>> +
>> +Example:
>> +
>> +&dsi {
>> +	...
>> +
>> +	panel@0 {
>> +		compatible = "samsung,s6e3ha2";
>> +		reg = <0>;
>> +		vdd3-supply = <&ldo27_reg>;
>> +		vci-supply = <&ldo28_reg>;
>> +		reset-gpios = <&gpg0 0 GPIO_ACTIVE_LOW>;
>> +		enable-gpios = <&gpf1 5 GPIO_ACTIVE_HIGH>;
>> +		te-gpios = <&gpf1 3 GPIO_ACTIVE_HIGH>;
>> +
>> +		port {
>> +			panel_in: endpoint {
>> +				remote-endpoint = <&dsi_out>;
> As I said previously, it makes no sense to have a graph to dsi_out it is 
> simply the parent node.

The problem is that exynos_dsi requires presence of endpoint node, when
it was written the policy was that graphs must be always present.
DSI reads from this node samsung,burst-clock-frequency and
samsung,esc-clock-frequency. For example in exynos4412-trats2.dts:

>         dsi_0: dsi@11C80000 {
>                 ...
>                 ports {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>  
>                         port@1 {
>                                 reg = <1>;
>
>                                 dsi_out: endpoint {
>                                         remote-endpoint = <&dsi_in>;
>                                         samsung,burst-clock-frequency
> = <500000000>;
>                                         samsung,esc-clock-frequency =
> <20000000>;
>                                 };
>                         };
>                 };
>         
>                 panel@0 {
>                         ...
>                         port {
>                                 dsi_in: endpoint {
>                                         remote-endpoint = <&dsi_out>;
>                                 };
>                         };
>                 };
>         };

However, DSI driver does not use remote-endpoint property, it is here
only to fulfill of_graph policy.
So if something like below is acceptable, we can get rid of port node in
panel:

>         dsi_0: dsi@11C80000 {
>                 ...
>                 ports {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>  
>                         port@1 {
>                                 reg = <1>;
>
>                                 dsi_out: endpoint {
>                                         samsung,burst-clock-frequency
> = <500000000>;
>                                         samsung,esc-clock-frequency =
> <20000000>;
>                                 };
>                         };
>                 };
>         
>                 panel@0 {
>                         ...
>                 };
>         };

What do you think?

Other solution is to move problematic properties somewhere else, but
this require change of bindings.
Anyway I would be glad to remove port nodes in other samsung panels:
s6e8aa0, ld9040.

Regards
Andrzej

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dri-devel@lists.freedesktop.org
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^ permalink raw reply	[flat|nested] 13+ messages in thread

* Re: [PATCH v5 2/3] drm/panel: Add support for S6E3HA2 panel driver on TM2 board
  2017-01-05  6:55         ` Andrzej Hajda
@ 2017-01-05  7:52           ` Inki Dae
  0 siblings, 0 replies; 13+ messages in thread
From: Inki Dae @ 2017-01-05  7:52 UTC (permalink / raw)
  To: Andrzej Hajda, Rob Herring, Hoegeun Kwon
  Cc: devicetree, krzk, cw00.choi, Donghwa Lee, linux-kernel, dri-devel,
	jh80.chung, linux-samsung-soc, kgene, Hyungwon Hwang



2017년 01월 05일 15:55에 Andrzej Hajda 이(가) 쓴 글:
> On 04.01.2017 15:44, Rob Herring wrote:
>> On Wed, Jan 04, 2017 at 05:15:10PM +0900, Hoegeun Kwon wrote:
>>> This patch add support for MIPI-DSI based S6E3HA2 AMOLED panel
>>> driver. This panel has 1440x2560 resolution in 5.7-inch physical
>>> panel in the TM2 device.
>>>
>>> Signed-off-by: Donghwa Lee <dh09.lee@samsung.com>
>>> Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
>>> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
>>> ---
>>>  .../bindings/display/panel/samsung,s6e3ha2.txt     |  40 ++
>>>  drivers/gpu/drm/panel/Kconfig                      |   6 +
>>>  drivers/gpu/drm/panel/Makefile                     |   1 +
>>>  drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c      | 741 +++++++++++++++++++++
>>>  4 files changed, 788 insertions(+)
>>>  create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
>>>  create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
>>>
>>> diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
>>> new file mode 100644
>>> index 0000000..6879f51
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
>>> @@ -0,0 +1,40 @@
>>> +Samsung S6E3HA2 5.7" 1440x2560 AMOLED panel
>>> +
>>> +Required properties:
>>> +  - compatible: "samsung,s6e3ha2"
>>> +  - reg: the virtual channel number of a DSI peripheral
>>> +  - vdd3-supply: I/O voltage supply
>>> +  - vci-supply: voltage supply for analog circuits
>>> +  - reset-gpios: a GPIO spec for the reset pin (active low)
>>> +  - enable-gpios: a GPIO spec for the panel enable pin (active high)
>>> +  - te-gpios: a GPIO spec for the tearing effect synchronization signal
>>> +    gpio pin (active high)
>>> +
>>> +The device node can contain one 'port' child node with one child
>>> +'endpoint' node, according to the bindings defined in [1]. This
>>> +node should describe panel's video bus.
>>> +
>>> +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
>>> +
>>> +Example:
>>> +
>>> +&dsi {
>>> +	...
>>> +
>>> +	panel@0 {
>>> +		compatible = "samsung,s6e3ha2";
>>> +		reg = <0>;
>>> +		vdd3-supply = <&ldo27_reg>;
>>> +		vci-supply = <&ldo28_reg>;
>>> +		reset-gpios = <&gpg0 0 GPIO_ACTIVE_LOW>;
>>> +		enable-gpios = <&gpf1 5 GPIO_ACTIVE_HIGH>;
>>> +		te-gpios = <&gpf1 3 GPIO_ACTIVE_HIGH>;
>>> +
>>> +		port {
>>> +			panel_in: endpoint {
>>> +				remote-endpoint = <&dsi_out>;
>> As I said previously, it makes no sense to have a graph to dsi_out it is 
>> simply the parent node.
> 
> The problem is that exynos_dsi requires presence of endpoint node, when
> it was written the policy was that graphs must be always present.
> DSI reads from this node samsung,burst-clock-frequency and
> samsung,esc-clock-frequency. For example in exynos4412-trats2.dts:
> 
>>         dsi_0: dsi@11C80000 {
>>                 ...
>>                 ports {
>>                         #address-cells = <1>;
>>                         #size-cells = <0>;
>>  
>>                         port@1 {
>>                                 reg = <1>;
>>
>>                                 dsi_out: endpoint {
>>                                         remote-endpoint = <&dsi_in>;
>>                                         samsung,burst-clock-frequency
>> = <500000000>;
>>                                         samsung,esc-clock-frequency =
>> <20000000>;
>>                                 };
>>                         };
>>                 };
>>         
>>                 panel@0 {
>>                         ...
>>                         port {
>>                                 dsi_in: endpoint {
>>                                         remote-endpoint = <&dsi_out>;
>>                                 };
>>                         };
>>                 };
>>         };
> 
> However, DSI driver does not use remote-endpoint property, it is here
> only to fulfill of_graph policy.
> So if something like below is acceptable, we can get rid of port node in
> panel:
> 
>>         dsi_0: dsi@11C80000 {
>>                 ...
>>                 ports {
>>                         #address-cells = <1>;
>>                         #size-cells = <0>;
>>  
>>                         port@1 {
>>                                 reg = <1>;
>>
>>                                 dsi_out: endpoint {
>>                                         samsung,burst-clock-frequency
>> = <500000000>;
>>                                         samsung,esc-clock-frequency =
>> <20000000>;
>>                                 };
>>                         };
>>                 };
>>         
>>                 panel@0 {
>>                         ...
>>                 };
>>         };
> 
> What do you think?
> 
> Other solution is to move problematic properties somewhere else, but
> this require change of bindings.
> Anyway I would be glad to remove port nodes in other samsung panels:
> s6e8aa0, ld9040.

In addition,

Now dsi and mic device nodes of exynos5433.dtsi include remote nodes which define Display pipeline. This is wrong.
Display pipeline is specific to board, not SoC so these things should be moved to exynos5433-tm2.dts file.

Hoegeun, you can do this with other patch also.

Thanks.

> 
> Regards
> Andrzej
> 
> --
> To unsubscribe from this list: send the line "unsubscribe devicetree" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> 
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^ permalink raw reply	[flat|nested] 13+ messages in thread

[parent not found: <CGME20170104081522epcas5p1985a9b2404976bd26df4e13fa5ffe1bc@epcas5p1.samsung.com>]

* [PATCH v5 3/3] arm64: dts: exynos: Add support for S6E3HA2 panel device on TM2 board
       [not found]   ` <CGME20170104081522epcas5p1985a9b2404976bd26df4e13fa5ffe1bc@epcas5p1.samsung.com>
@ 2017-01-04  8:15     ` Hoegeun Kwon
       [not found]       ` <1483517711-23849-4-git-send-email-hoegeun.kwon-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
  2017-01-04  9:57       ` Andrzej Hajda
  0 siblings, 2 replies; 13+ messages in thread
From: Hoegeun Kwon @ 2017-01-04  8:15 UTC (permalink / raw)
  To: robh, thierry.reding, airlied, kgene, krzk, inki.dae
  Cc: devicetree, linux-samsung-soc, linux-kernel, dri-devel,
	jh80.chung, cw00.choi, Hyungwon Hwang, Hoegeun Kwon

From: Hyungwon Hwang <human.hwang@samsung.com>

This patch add the panel device tree node for S6E3HA2 display
controller to TM2 dts.

Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
---
 arch/arm64/boot/dts/exynos/exynos5433-tm2.dts | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts b/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
index 5b9451d..b3ba1ac 100644
--- a/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
+++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
@@ -304,11 +304,28 @@
 			reg = <1>;
 
 			dsi_out: endpoint {
+				remote-endpoint = <&panel_in>;
 				samsung,burst-clock-frequency = <512000000>;
 				samsung,esc-clock-frequency = <16000000>;
 			};
 		};
 	};
+
+	panel@0 {
+		compatible = "samsung,s6e3ha2";
+		reg = <0>;
+		vdd3-supply = <&ldo27_reg>;
+		vci-supply = <&ldo28_reg>;
+		reset-gpios = <&gpg0 0 GPIO_ACTIVE_LOW>;
+		enable-gpios = <&gpf1 5 GPIO_ACTIVE_HIGH>;
+		te-gpios = <&gpf1 3 GPIO_ACTIVE_HIGH>;
+
+		port {
+			panel_in: endpoint {
+				remote-endpoint = <&dsi_out>;
+			};
+		};
+	};
 };
 
 &hsi2c_0 {
-- 
1.9.1

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^ permalink raw reply related	[flat|nested] 13+ messages in thread

[parent not found: <1483517711-23849-4-git-send-email-hoegeun.kwon-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>]

* Re: [PATCH v5 3/3] arm64: dts: exynos: Add support for S6E3HA2 panel device on TM2 board
       [not found]       ` <1483517711-23849-4-git-send-email-hoegeun.kwon-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
@ 2017-01-04  8:20         ` Chanwoo Choi
  0 siblings, 0 replies; 13+ messages in thread
From: Chanwoo Choi @ 2017-01-04  8:20 UTC (permalink / raw)
  To: Hoegeun Kwon, robh-DgEjT+Ai2ygdnm+yROfE0A,
	thierry.reding-Re5JQEeQqe8AvxtiuMwx3w, airlied-cv59FeDIM0c,
	kgene-DgEjT+Ai2ygdnm+yROfE0A, krzk-DgEjT+Ai2ygdnm+yROfE0A,
	inki.dae-Sze3O3UU22JBDgjK7y7TUQ
  Cc: dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA,
	devicetree-u79uwXL29TY76Z2rM5mHXA,
	linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA,
	a.hajda-Sze3O3UU22JBDgjK7y7TUQ, jh80.chung-Sze3O3UU22JBDgjK7y7TUQ,
	Hyungwon Hwang

Hi Hoegeun,

I tested this patch. But this patch does not include my tested-by tag.

Tested-by: Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>

Regards,
Chanwoo Choi

On 2017년 01월 04일 17:15, Hoegeun Kwon wrote:
> From: Hyungwon Hwang <human.hwang-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> 
> This patch add the panel device tree node for S6E3HA2 display
> controller to TM2 dts.
> 
> Signed-off-by: Hyungwon Hwang <human.hwang-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> Signed-off-by: Andrzej Hajda <a.hajda-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> Signed-off-by: Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> ---
>  arch/arm64/boot/dts/exynos/exynos5433-tm2.dts | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts b/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
> index 5b9451d..b3ba1ac 100644
> --- a/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
> +++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
> @@ -304,11 +304,28 @@
>  			reg = <1>;
>  
>  			dsi_out: endpoint {
> +				remote-endpoint = <&panel_in>;
>  				samsung,burst-clock-frequency = <512000000>;
>  				samsung,esc-clock-frequency = <16000000>;
>  			};
>  		};
>  	};
> +
> +	panel@0 {
> +		compatible = "samsung,s6e3ha2";
> +		reg = <0>;
> +		vdd3-supply = <&ldo27_reg>;
> +		vci-supply = <&ldo28_reg>;
> +		reset-gpios = <&gpg0 0 GPIO_ACTIVE_LOW>;
> +		enable-gpios = <&gpf1 5 GPIO_ACTIVE_HIGH>;
> +		te-gpios = <&gpf1 3 GPIO_ACTIVE_HIGH>;
> +
> +		port {
> +			panel_in: endpoint {
> +				remote-endpoint = <&dsi_out>;
> +			};
> +		};
> +	};
>  };
>  
>  &hsi2c_0 {
> 


-- 
Regards,
Chanwoo Choi
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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^ permalink raw reply	[flat|nested] 13+ messages in thread

* Re: [PATCH v5 3/3] arm64: dts: exynos: Add support for S6E3HA2 panel device on TM2 board
  2017-01-04  8:15     ` [PATCH v5 3/3] arm64: dts: exynos: Add support for S6E3HA2 panel device " Hoegeun Kwon
       [not found]       ` <1483517711-23849-4-git-send-email-hoegeun.kwon-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
@ 2017-01-04  9:57       ` Andrzej Hajda
  1 sibling, 0 replies; 13+ messages in thread
From: Andrzej Hajda @ 2017-01-04  9:57 UTC (permalink / raw)
  To: Hoegeun Kwon, robh, thierry.reding, airlied, kgene, krzk,
	inki.dae
  Cc: devicetree, linux-samsung-soc, linux-kernel, dri-devel,
	jh80.chung, cw00.choi, Hyungwon Hwang

On 04.01.2017 09:15, Hoegeun Kwon wrote:
> From: Hyungwon Hwang <human.hwang@samsung.com>
>
> This patch add the panel device tree node for S6E3HA2 display
> controller to TM2 dts.
>
> Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>

Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
--
Regards
Andrzej

> ---
>  arch/arm64/boot/dts/exynos/exynos5433-tm2.dts | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts b/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
> index 5b9451d..b3ba1ac 100644
> --- a/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
> +++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
> @@ -304,11 +304,28 @@
>  			reg = <1>;
>  
>  			dsi_out: endpoint {
> +				remote-endpoint = <&panel_in>;
>  				samsung,burst-clock-frequency = <512000000>;
>  				samsung,esc-clock-frequency = <16000000>;
>  			};
>  		};
>  	};
> +
> +	panel@0 {
> +		compatible = "samsung,s6e3ha2";
> +		reg = <0>;
> +		vdd3-supply = <&ldo27_reg>;
> +		vci-supply = <&ldo28_reg>;
> +		reset-gpios = <&gpg0 0 GPIO_ACTIVE_LOW>;
> +		enable-gpios = <&gpf1 5 GPIO_ACTIVE_HIGH>;
> +		te-gpios = <&gpf1 3 GPIO_ACTIVE_HIGH>;
> +
> +		port {
> +			panel_in: endpoint {
> +				remote-endpoint = <&dsi_out>;
> +			};
> +		};
> +	};
>  };
>  
>  &hsi2c_0 {


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^ permalink raw reply	[flat|nested] 13+ messages in thread

* Re: [PATCH v5 0/3] Add support for the S6E3HA2 panel on TM2 board
  2017-01-04  8:15 ` [PATCH v5 0/3] Add support for the S6E3HA2 panel on TM2 board Hoegeun Kwon
                     ` (2 preceding siblings ...)
       [not found]   ` <CGME20170104081522epcas5p1985a9b2404976bd26df4e13fa5ffe1bc@epcas5p1.samsung.com>
@ 2017-01-04  9:58   ` Andi Shyti
  3 siblings, 0 replies; 13+ messages in thread
From: Andi Shyti @ 2017-01-04  9:58 UTC (permalink / raw)
  To: Hoegeun Kwon
  Cc: robh, thierry.reding, airlied, kgene, krzk, inki.dae, dri-devel,
	linux-kernel, devicetree, linux-samsung-soc, a.hajda, cw00.choi,
	jh80.chung

Hi Hoegeun,

On Wed, Jan 04, 2017 at 05:15:08PM +0900, Hoegeun Kwon wrote:
> Purpose of this patch is add support for S6E3HA2 AMOLED panel on
> the TM2 board. The first patch adds support for S6E3HA2 panel
> device tree document and driver, the second patch add support for
> S6E3HA2 panel device tree.
> 
> Change for V5:
> - The V5 has only one fix in V4 below.
> - Removed the enable check of the mic driver in mode_set
>   callback, because mode_set should be performed every time.
> 
> Changes for V4:
> - Removed display-timings in devicetree, the display-timings has
>   been fixed to be provided by the device driver.
> - Added the mode_set callback function into exynos_drm_mic,
>   because the exynos_drm_mic driver can not parse a videomode
>   struct by removing the display-timings from the devicetree.

Next time, please add the full history, from "Changes for V1".
Moreover in this patchset you haven't added the
"Tested-by: Chanwoo..." in patch 2 and 3.

Andi

> 
> Hoegeun Kwon (2):
>   drm/exynos: mic: Add mode_set callback function
>   drm/panel: Add support for S6E3HA2 panel driver on TM2 board
> 
> Hyungwon Hwang (1):
>   arm64: dts: exynos: Add support for S6E3HA2 panel device on TM2 board
> 
>  .../bindings/display/panel/samsung,s6e3ha2.txt     |  40 ++
>  arch/arm64/boot/dts/exynos/exynos5433-tm2.dts      |  17 +
>  drivers/gpu/drm/exynos/exynos_drm_mic.c            |  30 +-
>  drivers/gpu/drm/panel/Kconfig                      |   6 +
>  drivers/gpu/drm/panel/Makefile                     |   1 +
>  drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c      | 741 +++++++++++++++++++++
>  6 files changed, 824 insertions(+), 11 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,s6e3ha2.txt
>  create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
> 
> -- 
> 1.9.1
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

^ permalink raw reply	[flat|nested] 13+ messages in thread

end of thread, other threads:[~2017-01-05  7:52 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
     [not found] <CGME20170104081520epcas1p42dd46f1d13adfde20a2559bd5c1cbd3d@epcas1p4.samsung.com>
2017-01-04  8:15 ` [PATCH v5 0/3] Add support for the S6E3HA2 panel on TM2 board Hoegeun Kwon
     [not found]   ` <CGME20170104081521epcas1p40d5fbfbe0600d0df05e77b36ce6a353f@epcas1p4.samsung.com>
2017-01-04  8:15     ` [PATCH v5 1/3] drm/exynos: mic: Add mode_set callback function Hoegeun Kwon
2017-01-04  9:05       ` Andrzej Hajda
     [not found]   ` <CGME20170104081522epcas5p112698b2499e56dc9027ec1f57f8964ee@epcas5p1.samsung.com>
2017-01-04  8:15     ` [PATCH v5 2/3] drm/panel: Add support for S6E3HA2 panel driver on TM2 board Hoegeun Kwon
2017-01-04  8:20       ` Chanwoo Choi
2017-01-04  9:39       ` Andrzej Hajda
2017-01-04 14:44       ` Rob Herring
2017-01-05  6:55         ` Andrzej Hajda
2017-01-05  7:52           ` Inki Dae
     [not found]   ` <CGME20170104081522epcas5p1985a9b2404976bd26df4e13fa5ffe1bc@epcas5p1.samsung.com>
2017-01-04  8:15     ` [PATCH v5 3/3] arm64: dts: exynos: Add support for S6E3HA2 panel device " Hoegeun Kwon
     [not found]       ` <1483517711-23849-4-git-send-email-hoegeun.kwon-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2017-01-04  8:20         ` Chanwoo Choi
2017-01-04  9:57       ` Andrzej Hajda
2017-01-04  9:58   ` [PATCH v5 0/3] Add support for the S6E3HA2 panel " Andi Shyti

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