[PATCH v3 0/7] Add support for panels found in various Tegra devices

[PATCH v3 0/7] Add support for panels found in various Tegra devices

[Svyatoslav Ryhel]

Add support for panels found in various Tegra30 and Tegra114 devices,
including panels in Tegra Note 7, Surface RT, Surface 2 and Ideapad
Yoga 11 T30.

---
Changes in v2:
- dropped gpu/drm: panel-edp: add AUO B116XAN02.0 panel entry (picked into drm-misc-next)
- expanded commit descriptions
- return accum_err on prepare
- switched to devm_regulator_bulk_get_const

Changes in v3:
- lg,ld070wx3.yaml > lg,ld070wx3-sl01.yaml
---

Anton Bambura (1):
  gpu/drm: panel: add Samsung LTL106HL02 MIPI DSI panel driver

Svyatoslav Ryhel (6):
  dt-bindings: display: panel: properly document LG LD070WX3 panel
  gpu/drm: panel: add support for LG LD070WX3-SL01 MIPI DSI panel
  ARM: tn7: adjust panel node
  dt-bindings: display: panel: document Samsung LTL106AL01 simple panel
  gpu/drm: panel: simple-panel: add Samsung LTL106AL01 LVDS panel
    support
  dt-bindings: display: panel: document Samsung LTL106HL02 MIPI DSI
    panel

 .../display/panel/lg,ld070wx3-sl01.yaml       |  60 ++++++
 .../display/panel/panel-simple-dsi.yaml       |   4 +-
 .../bindings/display/panel/panel-simple.yaml  |   2 +
 arch/arm/boot/dts/nvidia/tegra114-tn7.dts     |  13 +-
 drivers/gpu/drm/panel/Kconfig                 |  26 +++
 drivers/gpu/drm/panel/Makefile                |   2 +
 drivers/gpu/drm/panel/panel-lg-ld070wx3.c     | 184 ++++++++++++++++++
 .../gpu/drm/panel/panel-samsung-ltl106hl02.c  | 179 +++++++++++++++++
 drivers/gpu/drm/panel/panel-simple.c          |  65 ++++---
 9 files changed, 496 insertions(+), 39 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/display/panel/lg,ld070wx3-sl01.yaml
 create mode 100644 drivers/gpu/drm/panel/panel-lg-ld070wx3.c
 create mode 100644 drivers/gpu/drm/panel/panel-samsung-ltl106hl02.c

-- 
2.48.1

[PATCH v3 1/7] dt-bindings: display: panel: properly document LG LD070WX3 panel

[Svyatoslav Ryhel]

LG LD070WX3-SL01 was mistakenly documented as a simple DSI panel, which it
clearly is not. Address this by adding the proper schema for this panel.

There is only one user of this panel binding in the mainline Linux kernel,
which is the Nvidia tablet Tegra Note 7. Its panel is broken anyway since
it cannot initialize properly if the bootloader does not leave a
pre-initialized panel. It also cannot suspend or re-initialize properly,
since no DSI configuration is set and it has a loose regulator which
relies on an always-on property rather than being hooked to the panel
where it belongs.

Tegra Note 7 device tree is adjusted as a part of this series.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../display/panel/lg,ld070wx3-sl01.yaml       | 60 +++++++++++++++++++
 .../display/panel/panel-simple-dsi.yaml       |  2 -
 2 files changed, 60 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/display/panel/lg,ld070wx3-sl01.yaml

diff --git a/Documentation/devicetree/bindings/display/panel/lg,ld070wx3-sl01.yaml b/Documentation/devicetree/bindings/display/panel/lg,ld070wx3-sl01.yaml
new file mode 100644
index 000000000000..0f0b9079f199
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/lg,ld070wx3-sl01.yaml
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/lg,ld070wx3-sl01.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LG Corporation 7" WXGA TFT LCD panel
+
+maintainers:
+  - Svyatoslav Ryhel <clamor95@gmail.com>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: lg,ld070wx3-sl01
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+  vcc-supply: true
+
+  backlight: true
+  port: true
+
+required:
+  - compatible
+  - vdd-supply
+  - vcc-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel@0 {
+            compatible = "lg,ld070wx3-sl01";
+            reg = <0>;
+
+            vdd-supply = <&vdd_3v3_lcd>;
+            vcc-supply = <&vcc_1v8_lcd>;
+
+            backlight = <&backlight>;
+
+            port {
+                endpoint {
+                    remote-endpoint = <&dsi0_out>;
+                };
+            };
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
index 9b92a05791cc..f9f1e76a810c 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
@@ -42,8 +42,6 @@ properties:
       - kingdisplay,kd097d04
         # LG ACX467AKM-7 4.95" 1080×1920 LCD Panel
       - lg,acx467akm-7
-        # LG Corporation 7" WXGA TFT LCD panel
-      - lg,ld070wx3-sl01
         # LG Corporation 5" HD TFT LCD panel
       - lg,lh500wx1-sd03
         # Lincoln LCD197 5" 1080x1920 LCD panel
-- 
2.48.1

[PATCH v3 2/7] gpu/drm: panel: add support for LG LD070WX3-SL01 MIPI DSI panel

[Svyatoslav Ryhel]

The LD070WX3 is a Color Active Matrix Liquid Crystal Display with an
integral Light Emitting Diode (LED) backlight system. The matrix employs
a-Si Thin Film Transistor as the active element. It is a transmissive type
display operating in the normally Black mode. This TFT-LCD has 7.0 inches
diagonally measured active display area with WXGA resolution (800 by 1280
pixel array).

LG LD070WX3-SL01 MIPI DSI panel was treated as simple DSI panel when it is
actually not and requires proper setup for correct work. Simple panel work
relied on preliminary configuration done by bootloader.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
---
 drivers/gpu/drm/panel/Kconfig             |  13 ++
 drivers/gpu/drm/panel/Makefile            |   1 +
 drivers/gpu/drm/panel/panel-lg-ld070wx3.c | 184 ++++++++++++++++++++++
 drivers/gpu/drm/panel/panel-simple.c      |  31 ----
 4 files changed, 198 insertions(+), 31 deletions(-)
 create mode 100644 drivers/gpu/drm/panel/panel-lg-ld070wx3.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 045ffb2ccd0f..1f660ba065a1 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -408,6 +408,19 @@ config DRM_PANEL_LG_LB035Q02
 	  (found on the Gumstix Overo Palo35 board). To compile this driver as
 	  a module, choose M here.
 
+config DRM_PANEL_LG_LD070WX3
+	tristate "LG LD070WX3 MIPI DSI panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	select VIDEOMODE_HELPERS
+	help
+	  Say Y here if you want to enable support for the LD070WX3 MIPI DSI
+	  panel found in the NVIDIA Tegra Note 7 tablet.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called panel-lg-ld070wx3.
+
 config DRM_PANEL_LG_LG4573
 	tristate "LG4573 RGB/SPI panel"
 	depends on OF && SPI
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 0356775a443a..9281221183ac 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -41,6 +41,7 @@ obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK050H3146W) += panel-leadtek-ltk050h3146w.o
 obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK500HD1829) += panel-leadtek-ltk500hd1829.o
 obj-$(CONFIG_DRM_PANEL_LINCOLNTECH_LCD197) += panel-lincolntech-lcd197.o
 obj-$(CONFIG_DRM_PANEL_LG_LB035Q02) += panel-lg-lb035q02.o
+obj-$(CONFIG_DRM_PANEL_LG_LD070WX3) += panel-lg-ld070wx3.o
 obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
 obj-$(CONFIG_DRM_PANEL_LG_SW43408) += panel-lg-sw43408.o
 obj-$(CONFIG_DRM_PANEL_MAGNACHIP_D53E6EA8966) += panel-magnachip-d53e6ea8966.o
diff --git a/drivers/gpu/drm/panel/panel-lg-ld070wx3.c b/drivers/gpu/drm/panel/panel-lg-ld070wx3.c
new file mode 100644
index 000000000000..00cbfc5518a5
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-lg-ld070wx3.c
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/array_size.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+
+static const struct regulator_bulk_data lg_ld070wx3_supplies[] = {
+	{ .supply = "vdd" }, { .supply = "vcc" },
+};
+
+struct lg_ld070wx3 {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi;
+
+	struct regulator_bulk_data *supplies;
+};
+
+static inline struct lg_ld070wx3 *to_lg_ld070wx3(struct drm_panel *panel)
+{
+	return container_of(panel, struct lg_ld070wx3, panel);
+}
+
+static int lg_ld070wx3_prepare(struct drm_panel *panel)
+{
+	struct lg_ld070wx3 *priv = to_lg_ld070wx3(panel);
+	struct mipi_dsi_multi_context ctx = { .dsi = priv->dsi };
+	struct device *dev = panel->dev;
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(lg_ld070wx3_supplies), priv->supplies);
+	if (ret < 0) {
+		dev_err(dev, "failed to enable power supplies: %d\n", ret);
+		return ret;
+	}
+
+	/*
+	 * According to spec delay between enabling supply is 0,
+	 * for regulators to reach required voltage ~5ms needed.
+	 * MIPI interface signal for setup requires additional
+	 * 110ms which in total results in 115ms.
+	 */
+	mdelay(115);
+
+	mipi_dsi_dcs_soft_reset_multi(&ctx);
+	mipi_dsi_msleep(&ctx, 20);
+
+	/* Differential input impedance selection */
+	mipi_dsi_dcs_write_seq_multi(&ctx, 0xae, 0x0b);
+
+	/* Enter test mode 1 and 2*/
+	mipi_dsi_dcs_write_seq_multi(&ctx, 0xee, 0xea);
+	mipi_dsi_dcs_write_seq_multi(&ctx, 0xef, 0x5f);
+
+	/* Increased MIPI CLK driving ability */
+	mipi_dsi_dcs_write_seq_multi(&ctx, 0xf2, 0x68);
+
+	/* Exit test mode 1 and 2 */
+	mipi_dsi_dcs_write_seq_multi(&ctx, 0xee, 0x00);
+	mipi_dsi_dcs_write_seq_multi(&ctx, 0xef, 0x00);
+
+	return ctx.accum_err;
+}
+
+static int lg_ld070wx3_unprepare(struct drm_panel *panel)
+{
+	struct lg_ld070wx3 *priv = to_lg_ld070wx3(panel);
+	struct mipi_dsi_multi_context ctx = { .dsi = priv->dsi };
+
+	mipi_dsi_dcs_enter_sleep_mode_multi(&ctx);
+
+	msleep(50);
+
+	regulator_bulk_disable(ARRAY_SIZE(lg_ld070wx3_supplies), priv->supplies);
+
+	/* power supply must be off for at least 1s after panel disable */
+	msleep(1000);
+
+	return 0;
+}
+
+static const struct drm_display_mode lg_ld070wx3_mode = {
+	.clock = (800 + 32 + 48 + 8) * (1280 + 5 + 3 + 1) * 60 / 1000,
+	.hdisplay = 800,
+	.hsync_start = 800 + 32,
+	.hsync_end = 800 + 32 + 48,
+	.htotal = 800 + 32 + 48 + 8,
+	.vdisplay = 1280,
+	.vsync_start = 1280 + 5,
+	.vsync_end = 1280 + 5 + 3,
+	.vtotal = 1280 + 5 + 3 + 1,
+	.width_mm = 94,
+	.height_mm = 151,
+	.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
+};
+
+static int lg_ld070wx3_get_modes(struct drm_panel *panel,
+				 struct drm_connector *connector)
+{
+	return drm_connector_helper_get_modes_fixed(connector, &lg_ld070wx3_mode);
+}
+
+static const struct drm_panel_funcs lg_ld070wx3_panel_funcs = {
+	.prepare = lg_ld070wx3_prepare,
+	.unprepare = lg_ld070wx3_unprepare,
+	.get_modes = lg_ld070wx3_get_modes,
+};
+
+static int lg_ld070wx3_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct lg_ld070wx3 *priv;
+	int ret;
+
+	priv = devm_drm_panel_alloc(dev, struct lg_ld070wx3, panel,
+				    &lg_ld070wx3_panel_funcs,
+				    DRM_MODE_CONNECTOR_DSI);
+	if (IS_ERR(priv))
+		return PTR_ERR(priv);
+
+	ret = devm_regulator_bulk_get_const(dev, ARRAY_SIZE(lg_ld070wx3_supplies),
+					    lg_ld070wx3_supplies, &priv->supplies);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "failed to get supplies\n");
+
+	priv->dsi = dsi;
+	mipi_dsi_set_drvdata(dsi, priv);
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM;
+
+	ret = drm_panel_of_backlight(&priv->panel);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "failed to get backlight\n");
+
+	drm_panel_add(&priv->panel);
+
+	ret = devm_mipi_dsi_attach(dev, dsi);
+	if (ret < 0) {
+		drm_panel_remove(&priv->panel);
+		return dev_err_probe(dev, ret, "failed to attach to DSI host\n");
+	}
+
+	return 0;
+}
+
+static void lg_ld070wx3_remove(struct mipi_dsi_device *dsi)
+{
+	struct lg_ld070wx3 *priv = mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_remove(&priv->panel);
+}
+
+static const struct of_device_id lg_ld070wx3_of_match[] = {
+	{ .compatible = "lg,ld070wx3-sl01" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, lg_ld070wx3_of_match);
+
+static struct mipi_dsi_driver lg_ld070wx3_driver = {
+	.driver = {
+		.name = "panel-lg-ld070wx3",
+		.of_match_table = lg_ld070wx3_of_match,
+	},
+	.probe = lg_ld070wx3_probe,
+	.remove = lg_ld070wx3_remove,
+};
+module_mipi_dsi_driver(lg_ld070wx3_driver);
+
+MODULE_AUTHOR("Svyatoslav Ryhel <clamor95@gmail.com>");
+MODULE_DESCRIPTION("LG LD070WX3-SL01 DSI panel driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index da6b71b70a46..6369e5828189 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -5600,34 +5600,6 @@ static const struct panel_desc_dsi boe_tv080wum_nl0 = {
 	.lanes = 4,
 };
 
-static const struct drm_display_mode lg_ld070wx3_sl01_mode = {
-	.clock = 71000,
-	.hdisplay = 800,
-	.hsync_start = 800 + 32,
-	.hsync_end = 800 + 32 + 1,
-	.htotal = 800 + 32 + 1 + 57,
-	.vdisplay = 1280,
-	.vsync_start = 1280 + 28,
-	.vsync_end = 1280 + 28 + 1,
-	.vtotal = 1280 + 28 + 1 + 14,
-};
-
-static const struct panel_desc_dsi lg_ld070wx3_sl01 = {
-	.desc = {
-		.modes = &lg_ld070wx3_sl01_mode,
-		.num_modes = 1,
-		.bpc = 8,
-		.size = {
-			.width = 94,
-			.height = 151,
-		},
-		.connector_type = DRM_MODE_CONNECTOR_DSI,
-	},
-	.flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_CLOCK_NON_CONTINUOUS,
-	.format = MIPI_DSI_FMT_RGB888,
-	.lanes = 4,
-};
-
 static const struct drm_display_mode lg_lh500wx1_sd03_mode = {
 	.clock = 67000,
 	.hdisplay = 720,
@@ -5751,9 +5723,6 @@ static const struct of_device_id dsi_of_match[] = {
 	}, {
 		.compatible = "boe,tv080wum-nl0",
 		.data = &boe_tv080wum_nl0
-	}, {
-		.compatible = "lg,ld070wx3-sl01",
-		.data = &lg_ld070wx3_sl01
 	}, {
 		.compatible = "lg,lh500wx1-sd03",
 		.data = &lg_lh500wx1_sd03
-- 
2.48.1

[PATCH v3 3/7] ARM: tn7: adjust panel node

[Svyatoslav Ryhel]

Adjust panel node in Tegra Note 7 according to the updated schema.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
 arch/arm/boot/dts/nvidia/tegra114-tn7.dts | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/arm/boot/dts/nvidia/tegra114-tn7.dts b/arch/arm/boot/dts/nvidia/tegra114-tn7.dts
index bfbdb345575a..75fbafb4a872 100644
--- a/arch/arm/boot/dts/nvidia/tegra114-tn7.dts
+++ b/arch/arm/boot/dts/nvidia/tegra114-tn7.dts
@@ -43,7 +43,9 @@ panel@0 {
 				compatible = "lg,ld070wx3-sl01";
 				reg = <0>;
 
-				power-supply = <&vdd_lcd>;
+				vdd-supply = <&avdd_lcd>;
+				vcc-supply = <&dvdd_lcd>;
+
 				backlight = <&backlight>;
 			};
 		};
@@ -101,11 +103,10 @@ smps45 {
 						regulator-boot-on;
 					};
 
-					smps6 {
+					avdd_lcd: smps6 {
 						regulator-name = "va-lcd-hv";
-						regulator-min-microvolt = <3000000>;
-						regulator-max-microvolt = <3000000>;
-						regulator-always-on;
+						regulator-min-microvolt = <3160000>;
+						regulator-max-microvolt = <3160000>;
 						regulator-boot-on;
 					};
 
@@ -325,7 +326,7 @@ lcd_bl_en: regulator-lcden {
 		regulator-boot-on;
 	};
 
-	vdd_lcd: regulator-lcd {
+	dvdd_lcd: regulator-lcd {
 		compatible = "regulator-fixed";
 		regulator-name = "VD_LCD_1V8";
 		regulator-min-microvolt = <1800000>;
-- 
2.48.1

[PATCH v3 4/7] dt-bindings: display: panel: document Samsung LTL106AL01 simple panel

[Svyatoslav Ryhel]

Document Samsung LTL106AL01 simple LVDS panel.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
---
 .../devicetree/bindings/display/panel/panel-simple.yaml         | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
index 4a5ca013d0db..adb244460a09 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
@@ -274,6 +274,8 @@ properties:
       - rocktech,rk043fn48h
         # Samsung Electronics 10.1" WXGA (1280x800) TFT LCD panel
       - samsung,ltl101al01
+        # Samsung Electronics 10.6" FWXGA (1366x768) TFT LCD panel
+      - samsung,ltl106al01
         # Samsung Electronics 10.1" WSVGA TFT LCD panel
       - samsung,ltn101nt05
         # Satoz SAT050AT40H12R2 5.0" WVGA TFT LCD panel
-- 
2.48.1

[PATCH v3 5/7] gpu/drm: panel: simple-panel: add Samsung LTL106AL01 LVDS panel support

[Svyatoslav Ryhel]

Samsung LTL106AL01 is a 10.6" FWXGA (1366x768) simple LVDS panel found in
Microsoft Surface RT tablet.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
 drivers/gpu/drm/panel/panel-simple.c | 34 ++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 6369e5828189..bdb53824e3ed 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -4223,6 +4223,37 @@ static const struct panel_desc samsung_ltl101al01 = {
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
+static const struct display_timing samsung_ltl106al01_timing = {
+	.pixelclock = { 71980000, 71980000, 71980000 },
+	.hactive = { 1366, 1366, 1366 },
+	.hfront_porch = { 56, 56, 56 },
+	.hback_porch = { 106, 106, 106 },
+	.hsync_len = { 14, 14, 14 },
+	.vactive = { 768, 768, 768 },
+	.vfront_porch = { 3, 3, 3 },
+	.vback_porch = { 6, 6, 6 },
+	.vsync_len = { 1, 1, 1 },
+	.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW,
+};
+
+static const struct panel_desc samsung_ltl106al01 = {
+	.timings = &samsung_ltl106al01_timing,
+	.num_timings = 1,
+	.bpc = 8,
+	.size = {
+		.width = 235,
+		.height = 132,
+	},
+	.delay = {
+		.prepare = 5,
+		.enable = 10,
+		.disable = 10,
+		.unprepare = 5,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
+	.connector_type = DRM_MODE_CONNECTOR_LVDS,
+};
+
 static const struct drm_display_mode samsung_ltn101nt05_mode = {
 	.clock = 54030,
 	.hdisplay = 1024,
@@ -5390,6 +5421,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "samsung,ltl101al01",
 		.data = &samsung_ltl101al01,
+	}, {
+		.compatible = "samsung,ltl106al01",
+		.data = &samsung_ltl106al01,
 	}, {
 		.compatible = "samsung,ltn101nt05",
 		.data = &samsung_ltn101nt05,
-- 
2.48.1

[PATCH v3 6/7] dt-bindings: display: panel: document Samsung LTL106HL02 MIPI DSI panel

[Svyatoslav Ryhel]

Samsung LTL106HL02 is a simple DSI which requires only a power supply and
an optional reset gpio.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
---
 .../devicetree/bindings/display/panel/panel-simple-dsi.yaml     | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
index f9f1e76a810c..01ac0af0e299 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
@@ -52,6 +52,8 @@ properties:
       - panasonic,vvx10f004b00
         # Panasonic 10" WUXGA TFT LCD panel
       - panasonic,vvx10f034n00
+        # Samsung ltl106hl02 10.6" Full HD TFT LCD panel
+      - samsung,ltl106hl02-001
         # Samsung s6e3fa7 1080x2220 based AMS559NK06 AMOLED panel
       - samsung,s6e3fa7-ams559nk06
         # Samsung s6e3fc2x01 1080x2340 AMOLED panel
-- 
2.48.1

[PATCH v3 7/7] gpu/drm: panel: add Samsung LTL106HL02 MIPI DSI panel driver

[Svyatoslav Ryhel]

From: Anton Bambura <jenneron@protonmail.com>

LTL106HL02 is a color active matrix TFT (Thin Film Transistor) liquid
crystal display (LCD) that uses amorphous silicon TFT as switching
devices. This model is composed of a TFT LCD panel, a driver circuit and a
backlight unit. The resolution of a 10.6" contains 1920 x 1080 pixels and
can display up to 16,8M color with wide viewing angle.

Signed-off-by: Jonas Schwöbel <jonasschwoebel@yahoo.de>
Signed-off-by: Anton Bambura <jenneron@protonmail.com>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
 drivers/gpu/drm/panel/Kconfig                 |  13 ++
 drivers/gpu/drm/panel/Makefile                |   1 +
 .../gpu/drm/panel/panel-samsung-ltl106hl02.c  | 179 ++++++++++++++++++
 3 files changed, 193 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-samsung-ltl106hl02.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 1f660ba065a1..2433a2931f63 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -781,6 +781,19 @@ config DRM_PANEL_SAMSUNG_LD9040
 	depends on BACKLIGHT_CLASS_DEVICE
 	select VIDEOMODE_HELPERS
 
+config DRM_PANEL_SAMSUNG_LTL106HL02
+	tristate "Samsung LTL106HL02 panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	select VIDEOMODE_HELPERS
+	help
+	  Say Y here if you want to enable support for the Samsung LTL106HL02
+	  panel driver which is used in Microsoft Surface 2.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called panel-samsung-ltl106hl02.
+
 config DRM_PANEL_SAMSUNG_S6E3FA7
 	tristate "Samsung S6E3FA7 panel driver"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 9281221183ac..a87ae98362bd 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -76,6 +76,7 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_AMS639RQ08) += panel-samsung-ams639rq08.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20) += panel-samsung-atna33xc20.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_DB7430) += panel-samsung-db7430.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
+obj-$(CONFIG_DRM_PANEL_SAMSUNG_LTL106HL02) += panel-samsung-ltl106hl02.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D16D0) += panel-samsung-s6d16d0.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D27A1) += panel-samsung-s6d27a1.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D7AA0) += panel-samsung-s6d7aa0.o
diff --git a/drivers/gpu/drm/panel/panel-samsung-ltl106hl02.c b/drivers/gpu/drm/panel/panel-samsung-ltl106hl02.c
new file mode 100644
index 000000000000..1618841b7caa
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-ltl106hl02.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/array_size.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+
+struct samsung_ltl106hl02 {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi;
+
+	struct regulator *supply;
+	struct gpio_desc *reset_gpio;
+};
+
+static inline struct samsung_ltl106hl02 *to_samsung_ltl106hl02(struct drm_panel *panel)
+{
+	return container_of(panel, struct samsung_ltl106hl02, panel);
+}
+
+static void samsung_ltl106hl02_reset(struct samsung_ltl106hl02 *ctx)
+{
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	usleep_range(10000, 11000);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	usleep_range(2000, 3000);
+}
+
+static int samsung_ltl106hl02_prepare(struct drm_panel *panel)
+{
+	struct samsung_ltl106hl02 *ctx = to_samsung_ltl106hl02(panel);
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+	struct device *dev = &ctx->dsi->dev;
+	int ret;
+
+	ret = regulator_enable(ctx->supply);
+	if (ret < 0) {
+		dev_err(dev, "failed to enable power supply %d\n", ret);
+		return ret;
+	}
+
+	if (ctx->reset_gpio)
+		samsung_ltl106hl02_reset(ctx);
+
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 70);
+
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 5);
+
+	return dsi_ctx.accum_err;
+}
+
+static int samsung_ltl106hl02_unprepare(struct drm_panel *panel)
+{
+	struct samsung_ltl106hl02 *ctx = to_samsung_ltl106hl02(panel);
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 50);
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 150);
+
+	if (ctx->reset_gpio)
+		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+
+	regulator_disable(ctx->supply);
+
+	return 0;
+}
+
+static const struct drm_display_mode samsung_ltl106hl02_mode = {
+	.clock = (1920 + 32 + 32 + 64) * (1080 + 6 + 3 + 22) * 60 / 1000,
+	.hdisplay = 1920,
+	.hsync_start = 1920 + 32,
+	.hsync_end = 1920 + 32 + 32,
+	.htotal = 1920 + 32 + 32 + 64,
+	.vdisplay = 1080,
+	.vsync_start = 1080 + 6,
+	.vsync_end = 1080 + 6 + 3,
+	.vtotal = 1080 + 6 + 3 + 22,
+	.width_mm = 235,
+	.height_mm = 132,
+	.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
+};
+
+static int samsung_ltl106hl02_get_modes(struct drm_panel *panel,
+					struct drm_connector *connector)
+{
+	return drm_connector_helper_get_modes_fixed(connector, &samsung_ltl106hl02_mode);
+}
+
+static const struct drm_panel_funcs samsung_ltl106hl02_panel_funcs = {
+	.prepare = samsung_ltl106hl02_prepare,
+	.unprepare = samsung_ltl106hl02_unprepare,
+	.get_modes = samsung_ltl106hl02_get_modes,
+};
+
+static int samsung_ltl106hl02_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct samsung_ltl106hl02 *ctx;
+	int ret;
+
+	ctx = devm_drm_panel_alloc(dev, struct samsung_ltl106hl02, panel,
+				   &samsung_ltl106hl02_panel_funcs,
+				   DRM_MODE_CONNECTOR_DSI);
+	if (IS_ERR(ctx))
+		return PTR_ERR(ctx);
+
+	ctx->supply = devm_regulator_get(dev, "power");
+	if (IS_ERR(ctx->supply))
+		return dev_err_probe(dev, PTR_ERR(ctx->supply),
+				     "Failed to get power regulator\n");
+
+	ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->reset_gpio))
+		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
+				     "Failed to get reset-gpios\n");
+
+	ctx->dsi = dsi;
+	mipi_dsi_set_drvdata(dsi, ctx);
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM;
+
+	ret = drm_panel_of_backlight(&ctx->panel);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get backlight\n");
+
+	drm_panel_add(&ctx->panel);
+
+	ret = devm_mipi_dsi_attach(dev, dsi);
+	if (ret < 0) {
+		drm_panel_remove(&ctx->panel);
+		return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
+	}
+
+	return 0;
+}
+
+static void samsung_ltl106hl02_remove(struct mipi_dsi_device *dsi)
+{
+	struct samsung_ltl106hl02 *ctx = mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_remove(&ctx->panel);
+}
+
+static const struct of_device_id samsung_ltl106hl02_of_match[] = {
+	{ .compatible = "samsung,ltl106hl02-001" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, samsung_ltl106hl02_of_match);
+
+static struct mipi_dsi_driver samsung_ltl106hl02_driver = {
+	.driver = {
+		.name = "panel-samsung-ltl106hl02",
+		.of_match_table = samsung_ltl106hl02_of_match,
+	},
+	.probe = samsung_ltl106hl02_probe,
+	.remove = samsung_ltl106hl02_remove,
+};
+module_mipi_dsi_driver(samsung_ltl106hl02_driver);
+
+MODULE_AUTHOR("Anton Bambura <jenneron@protonmail.com>");
+MODULE_DESCRIPTION("DRM driver for Samsung LTL106HL02 video mode DSI panel");
+MODULE_LICENSE("GPL");
-- 
2.48.1