[PATCH 1/3] dt-bindings: display: simple: add support for Samsung LTL101AL01

[PATCH 1/3] dt-bindings: display: simple: add support for Samsung LTL101AL01

[Martin Jücker]

Add the Samsung LTL101AL01 WXGA LCD panel to the list.

Signed-off-by: Martin Jücker <martin.juecker@gmail.com>
---
 .../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 1eb9dd4f8f58..9501b5a3c011 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
@@ -270,6 +270,8 @@ properties:
       - samsung,atna33xc20
         # Samsung 12.2" (2560x1600 pixels) TFT LCD panel
       - samsung,lsn122dl01-c01
+        # Samsung Electronics 10.1" WXGA (1280x800) TFT LCD panel
+      - samsung,ltl101al01
         # Samsung Electronics 10.1" WSVGA TFT LCD panel
       - samsung,ltn101nt05
         # Samsung Electronics 14" WXGA (1366x768) TFT LCD panel
-- 
2.25.1

[PATCH 2/3] drm/panel: simple: add support for the Samsung LTL101AL01 panel

[Martin Jücker]

Add timings and panel description for the Samsung LTL101AL01 panel.

Signed-off-by: Martin Jücker <martin.juecker@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 a34f4198a534..e21f304315e4 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -3073,6 +3073,37 @@ static const struct panel_desc rocktech_rk101ii01d_ct = {
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
+static const struct display_timing samsung_ltl101al01_timing = {
+	.pixelclock = { 66663000, 66663000, 66663000 },
+	.hactive = { 1280, 1280, 1280 },
+	.hfront_porch = { 18, 18, 18 },
+	.hback_porch = { 36, 36, 36 },
+	.hsync_len = { 16, 16, 16 },
+	.vactive = { 800, 800, 800 },
+	.vfront_porch = { 4, 4, 4 },
+	.vback_porch = { 16, 16, 16 },
+	.vsync_len = { 3, 3, 3 },
+	.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW,
+};
+
+static const struct panel_desc samsung_ltl101al01 = {
+	.timings = &samsung_ltl101al01_timing,
+	.num_timings = 1,
+	.bpc = 8,
+	.size = {
+		.width = 217,
+		.height = 135,
+	},
+	.delay = {
+		.prepare = 40,
+		.enable = 300,
+		.disable = 200,
+		.unprepare = 600,
+	},
+	.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,
@@ -3966,6 +3997,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "rocktech,rk101ii01d-ct",
 		.data = &rocktech_rk101ii01d_ct,
+	}, {
+		.compatible = "samsung,ltl101al01",
+		.data = &samsung_ltl101al01,
 	}, {
 		.compatible = "samsung,ltn101nt05",
 		.data = &samsung_ltn101nt05,
-- 
2.25.1

Re: [PATCH 2/3] drm/panel: simple: add support for the Samsung LTL101AL01 panel

[Sam Ravnborg]

Hi Martin, the patch looks good.

On Mon, May 16, 2022 at 09:37:08PM +0200, Martin Jücker wrote:
> Add timings and panel description for the Samsung LTL101AL01 panel.
> 
> Signed-off-by: Martin Jücker <martin.juecker@gmail.com>

Applied to drm-misc (drm-misc-next).

	Sam

[PATCH 3/3] ARM: dts: exynos: add panel and backlight to p4note

[Martin Jücker]

Add configuration for the LTL101AL01 panel and a pwm backlight to drive
the display in the p4note devices.

Signed-off-by: Martin Jücker <martin.juecker@gmail.com>
---
 arch/arm/boot/dts/exynos4412-p4note.dtsi | 84 ++++++++++++++++++++----
 1 file changed, 71 insertions(+), 13 deletions(-)

diff --git a/arch/arm/boot/dts/exynos4412-p4note.dtsi b/arch/arm/boot/dts/exynos4412-p4note.dtsi
index 97f131b1014b..1fd051b52387 100644
--- a/arch/arm/boot/dts/exynos4412-p4note.dtsi
+++ b/arch/arm/boot/dts/exynos4412-p4note.dtsi
@@ -106,6 +106,16 @@ voltage-regulator-3 {
 		regulator-always-on;
 	};
 
+	panel_vdd: voltage-regulator-4 {
+		compatible = "regulator-fixed";
+		regulator-name = "LCD_ENABLE";
+		pinctrl-names = "default";
+		pinctrl-0 = <&lcd_enable>;
+		gpios = <&gpc0 1 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-boot-on;
+	};
+
 	wlan_pwrseq: sdhci3-pwrseq {
 		compatible = "mmc-pwrseq-simple";
 		reset-gpios = <&gpm3 5 GPIO_ACTIVE_LOW>;
@@ -216,6 +226,32 @@ power_supply: charger@6 {
 			monitored-battery = <&battery_cell>;
 		};
 	};
+
+	panel {
+		compatible = "samsung,ltl101al01";
+		pinctrl-0 = <&lvds_nshdn>;
+		pinctrl-names = "default";
+		power-supply = <&panel_vdd>;
+		enable-gpios = <&gpm0 5 GPIO_ACTIVE_HIGH>;
+		backlight = <&backlight>;
+
+		port {
+			lcd_ep: endpoint {
+				remote-endpoint = <&fimd_ep>;
+			};
+		};
+	};
+
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pinctrl-0 = <&led_bl_reset>;
+		pinctrl-names = "default";
+		enable-gpios = <&gpm0 1 GPIO_ACTIVE_HIGH>;
+		pwms = <&pwm 1 78770 0>;
+		brightness-levels = <0 48 128 255>;
+		num-interpolated-steps = <8>;
+		default-brightness-level = <12>;
+	};
 };
 
 &adc {
@@ -295,22 +331,19 @@ &exynos_usbphy {
 };
 
 &fimd {
-	pinctrl-0 = <&lcd_clk &lcd_data24 &pwm1_out>;
+	pinctrl-0 = <&lcd_clk &lcd_data24>;
 	pinctrl-names = "default";
+	#address-cells = <1>;
+	#size-cells = <0>;
 	status = "okay";
 
-	display-timings {
-		timing0 {
-			clock-frequency = <66666666>;
-			hactive = <1280>;
-			vactive = <800>;
-			hfront-porch = <18>;
-			hback-porch = <36>;
-			hsync-len = <16>;
-			vback-porch = <16>;
-			vfront-porch = <4>;
-			vsync-len = <3>;
-			hsync-active = <1>;
+	samsung,invert-vclk;
+
+	port@3 {
+		reg = <3>;
+
+		fimd_ep: endpoint {
+			remote-endpoint = <&lcd_ep>;
 		};
 	};
 };
@@ -687,6 +720,12 @@ tsp_reg_gpio_3: tsp-reg-gpio-3-pins {
 		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
 	};
 
+	lcd_enable: lcd-enable-pins {
+		samsung,pins = "gpc0-1";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+	};
+
 	sleep0: sleep-state {
 		PIN_SLP(gpa0-0, INPUT, NONE);
 		PIN_SLP(gpa0-1, OUT0, NONE);
@@ -809,12 +848,24 @@ uart_sel: uart-sel-pins {
 		/* 0 = CP, 1 = AP (serial output) */
 	};
 
+	led_bl_reset: led-bl-reset-pins {
+		samsung,pins = "gpm0-1";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+	};
+
 	tsp_rst: tsp-rst-pins {
 		samsung,pins = "gpm0-4";
 		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
 		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
 	};
 
+	lvds_nshdn: lvds-nshdn-pins {
+		samsung,pins = "gpm0-5";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+	};
+
 	tsp_irq: tsp-irq-pins {
 		samsung,pins = "gpm2-3";
 		samsung,pin-function = <EXYNOS_PIN_FUNC_F>;
@@ -1100,6 +1151,13 @@ &pmu_system_controller {
 	assigned-clock-parents = <&clock CLK_XUSBXTI>;
 };
 
+&pwm {
+	pinctrl-0 = <&pwm1_out>;
+	pinctrl-names = "default";
+	samsung,pwm-outputs = <1>;
+	status = "okay";
+};
+
 &rtc {
 	clocks = <&clock CLK_RTC>, <&max77686 MAX77686_CLK_AP>;
 	clock-names = "rtc", "rtc_src";
-- 
2.25.1

Re: (subset) [PATCH 3/3] ARM: dts: exynos: add panel and backlight to p4note

[Krzysztof Kozlowski]

On Mon, 16 May 2022 21:37:09 +0200, Martin Jücker wrote:
> Add configuration for the LTL101AL01 panel and a pwm backlight to drive
> the display in the p4note devices.
> 
> 

Applied, thanks!

[3/3] ARM: dts: exynos: add panel and backlight to p4note
      https://git.kernel.org/krzk/linux/c/6c52573bf4c3a0f6e7142264fb36b31ae2c3707a

Best regards,
-- 
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Re: [PATCH 1/3] dt-bindings: display: simple: add support for Samsung LTL101AL01

[Krzysztof Kozlowski]

On 16/05/2022 21:37, Martin Jücker wrote:
> Add the Samsung LTL101AL01 WXGA LCD panel to the list.
> 
> Signed-off-by: Martin Jücker <martin.juecker@gmail.com>
> ---
>  .../devicetree/bindings/display/panel/panel-simple.yaml         | 2 ++


Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>


Best regards,
Krzysztof

Re: [PATCH 1/3] dt-bindings: display: simple: add support for Samsung LTL101AL01

[Sam Ravnborg]

Hi Martin,

On Mon, May 16, 2022 at 09:37:07PM +0200, Martin Jücker wrote:
> Add the Samsung LTL101AL01 WXGA LCD panel to the list.
> 
> Signed-off-by: Martin Jücker <martin.juecker@gmail.com>

Applied to drm-misc (drm-misc-next).

	Sam