[U-Boot] [PATCH 05/13] colibri_t20: add LCD display support

[Marcel Ziswiler <marcel@ziswiler.com>]

From: Marcel Ziswiler <marcel.ziswiler@toradex.com>

Add LCD display support defaulting to VESA VGA resolution. Different
resolutions configurable via device-tree.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
---
 arch/arm/dts/tegra20-colibri.dts        | 29 +++++++++++++++++++++++++++++
 board/toradex/colibri_t20/colibri_t20.c | 18 ++++++++++++++++++
 include/configs/colibri_t20.h           | 10 ++++++++++
 3 files changed, 57 insertions(+)

diff --git a/arch/arm/dts/tegra20-colibri.dts b/arch/arm/dts/tegra20-colibri.dts
index 257ca27..ae40bad 100644
--- a/arch/arm/dts/tegra20-colibri.dts
+++ b/arch/arm/dts/tegra20-colibri.dts
@@ -17,6 +17,17 @@
 		sdhci0 = "/sdhci at c8000600";
 	};
 
+	host1x {
+		status = "okay";
+		dc at 54200000 {
+			status = "okay";
+			rgb {
+				status = "okay";
+				nvidia,panel = <&lcd_panel>;
+			};
+		};
+	};
+
 	usb at c5000000 {
 		dr_mode = "otg";
 	};
@@ -46,4 +57,22 @@
 		cd-gpios = <&gpio TEGRA_GPIO(C, 7) GPIO_ACTIVE_LOW>;
 		bus-width = <4>;
 	};
+
+	lcd_panel: panel {
+		clock = <25175000>;
+		xres = <640>;
+		yres = <480>;
+		left-margin = <48>;	/* horizontal back porch */
+		right-margin = <16>;	/* horizontal front porch */
+		hsync-len = <96>;
+		lower-margin = <11>;	/* vertical front porch */
+		upper-margin = <31>;	/* vertical back porch */
+		vsync-len = <2>;
+		hsync-active-high;
+		vsync-active-high;
+		nvidia,bits-per-pixel = <16>;
+		nvidia,pwm = <&pwm 2 0>;
+		nvidia,backlight-enable-gpios = <&gpio TEGRA_GPIO(T, 4) GPIO_ACTIVE_HIGH>;
+		nvidia,panel-timings = <0 0 0 0>;
+	};
 };
diff --git a/board/toradex/colibri_t20/colibri_t20.c b/board/toradex/colibri_t20/colibri_t20.c
index 7210a8a..81d344c 100644
--- a/board/toradex/colibri_t20/colibri_t20.c
+++ b/board/toradex/colibri_t20/colibri_t20.c
@@ -75,3 +75,21 @@ void pin_mux_usb(void)
 	pinmux_tristate_disable(PMUX_PINGRP_SPIG);
 }
 #endif
+
+#ifdef CONFIG_VIDEO_TEGRA
+/*
+ * Routine: pin_mux_display
+ * Description: setup the pin muxes/tristate values for the LCD interface)
+ */
+void pin_mux_display(void)
+{
+	/*
+	 * Manually untristate BL_ON (PT4 - SODIMM 71) as specified through
+	 * device-tree
+	 */
+	pinmux_tristate_disable(PMUX_PINGRP_DTA);
+
+	pinmux_set_func(PMUX_PINGRP_SDC, PMUX_FUNC_PWM);
+	pinmux_tristate_disable(PMUX_PINGRP_SDC);
+}
+#endif
diff --git a/include/configs/colibri_t20.h b/include/configs/colibri_t20.h
index b22e82a..fce1411 100644
--- a/include/configs/colibri_t20.h
+++ b/include/configs/colibri_t20.h
@@ -47,6 +47,16 @@
 /* General networking support */
 #define CONFIG_CMD_DHCP
 
+/* LCD support */
+#define CONFIG_LCD
+#define CONFIG_PWM_TEGRA
+#define CONFIG_VIDEO_TEGRA
+#define LCD_BPP				LCD_COLOR16
+#define CONFIG_SYS_WHITE_ON_BLACK
+#define CONFIG_CONSOLE_SCROLL_LINES	10
+#define CONFIG_CMD_BMP
+#define CONFIG_LCD_LOGO
+
 /* NAND support */
 #define CONFIG_CMD_NAND
 #define CONFIG_TEGRA_NAND
-- 
1.9.3