imx6: icorem6: Add framebuffer support

Add IPUv3 framebuffer support for Engicam i.CoreM6 qdl board.

Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

board/engicam/icorem6/icorem6.c

@@ -18,6 +18,7 @@
 #include <asm/arch/mx6-pins.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/imx-common/iomux-v3.h>
+#include <asm/imx-common/video.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -90,6 +91,113 @@ static void setup_gpmi_nand(void)
 }
 #endif
 
+#if defined(CONFIG_VIDEO_IPUV3)
+static iomux_v3_cfg_t const rgb_pads[] = {
+	IOMUX_PADS(PAD_DI0_DISP_CLK__IPU1_DI0_DISP_CLK),
+	IOMUX_PADS(PAD_DI0_PIN15__IPU1_DI0_PIN15),
+	IOMUX_PADS(PAD_DI0_PIN2__IPU1_DI0_PIN02),
+	IOMUX_PADS(PAD_DI0_PIN3__IPU1_DI0_PIN03),
+	IOMUX_PADS(PAD_DISP0_DAT0__IPU1_DISP0_DATA00),
+	IOMUX_PADS(PAD_DISP0_DAT1__IPU1_DISP0_DATA01),
+	IOMUX_PADS(PAD_DISP0_DAT2__IPU1_DISP0_DATA02),
+	IOMUX_PADS(PAD_DISP0_DAT3__IPU1_DISP0_DATA03),
+	IOMUX_PADS(PAD_DISP0_DAT4__IPU1_DISP0_DATA04),
+	IOMUX_PADS(PAD_DISP0_DAT5__IPU1_DISP0_DATA05),
+	IOMUX_PADS(PAD_DISP0_DAT6__IPU1_DISP0_DATA06),
+	IOMUX_PADS(PAD_DISP0_DAT7__IPU1_DISP0_DATA07),
+	IOMUX_PADS(PAD_DISP0_DAT8__IPU1_DISP0_DATA08),
+	IOMUX_PADS(PAD_DISP0_DAT9__IPU1_DISP0_DATA09),
+	IOMUX_PADS(PAD_DISP0_DAT10__IPU1_DISP0_DATA10),
+	IOMUX_PADS(PAD_DISP0_DAT11__IPU1_DISP0_DATA11),
+	IOMUX_PADS(PAD_DISP0_DAT12__IPU1_DISP0_DATA12),
+	IOMUX_PADS(PAD_DISP0_DAT13__IPU1_DISP0_DATA13),
+	IOMUX_PADS(PAD_DISP0_DAT14__IPU1_DISP0_DATA14),
+	IOMUX_PADS(PAD_DISP0_DAT15__IPU1_DISP0_DATA15),
+	IOMUX_PADS(PAD_DISP0_DAT16__IPU1_DISP0_DATA16),
+	IOMUX_PADS(PAD_DISP0_DAT17__IPU1_DISP0_DATA17),
+};
+
+static void enable_rgb(struct display_info_t const *dev)
+{
+	SETUP_IOMUX_PADS(rgb_pads);
+}
+
+struct display_info_t const displays[] = {
+	{
+		.bus	= -1,
+		.addr	= 0,
+		.pixfmt	= IPU_PIX_FMT_RGB666,
+		.detect	= NULL,
+		.enable	= enable_rgb,
+		.mode	= {
+			.name           = "Amp-WD",
+			.refresh        = 60,
+			.xres           = 800,
+			.yres           = 480,
+			.pixclock       = 30000,
+			.left_margin    = 30,
+			.right_margin   = 30,
+			.upper_margin   = 5,
+			.lower_margin   = 5,
+			.hsync_len      = 64,
+			.vsync_len      = 20,
+			.sync           = FB_SYNC_EXT,
+			.vmode          = FB_VMODE_NONINTERLACED
+		}
+	},
+};
+
+size_t display_count = ARRAY_SIZE(displays);
+
+static void setup_display(void)
+{
+	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
+	int reg;
+
+	enable_ipu_clock();
+
+	/* Turn on LDB0,IPU,IPU DI0 clocks */
+	reg = __raw_readl(&mxc_ccm->CCGR3);
+	reg |=  (MXC_CCM_CCGR3_LDB_DI0_MASK | 0xffff);
+	writel(reg, &mxc_ccm->CCGR3);
+
+	/* set LDB0, LDB1 clk select to 011/011 */
+	reg = readl(&mxc_ccm->cs2cdr);
+	reg &= ~(MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_MASK |
+		MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_MASK);
+	reg |= (3 << MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_OFFSET) |
+		(3 << MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_OFFSET);
+	writel(reg, &mxc_ccm->cs2cdr);
+
+	reg = readl(&mxc_ccm->cscmr2);
+	reg |= MXC_CCM_CSCMR2_LDB_DI0_IPU_DIV;
+	writel(reg, &mxc_ccm->cscmr2);
+
+	reg = readl(&mxc_ccm->chsccdr);
+	reg |= (CHSCCDR_CLK_SEL_LDB_DI0 <<
+		MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_OFFSET);
+	writel(reg, &mxc_ccm->chsccdr);
+
+	reg = IOMUXC_GPR2_BGREF_RRMODE_EXTERNAL_RES |
+		IOMUXC_GPR2_DI1_VS_POLARITY_ACTIVE_HIGH |
+		IOMUXC_GPR2_DI0_VS_POLARITY_ACTIVE_LOW |
+		IOMUXC_GPR2_BIT_MAPPING_CH1_SPWG |
+		IOMUXC_GPR2_DATA_WIDTH_CH1_18BIT |
+		IOMUXC_GPR2_BIT_MAPPING_CH0_SPWG |
+		IOMUXC_GPR2_DATA_WIDTH_CH0_18BIT |
+		IOMUXC_GPR2_LVDS_CH1_MODE_DISABLED |
+		IOMUXC_GPR2_LVDS_CH0_MODE_ENABLED_DI0;
+	writel(reg, &iomux->gpr[2]);
+
+	reg = readl(&iomux->gpr[3]);
+	reg = (reg & ~IOMUXC_GPR3_LVDS0_MUX_CTL_MASK) |
+		(IOMUXC_GPR3_MUX_SRC_IPU1_DI0 <<
+		IOMUXC_GPR3_LVDS0_MUX_CTL_OFFSET);
+	writel(reg, &iomux->gpr[3]);
+}
+#endif /* CONFIG_VIDEO_IPUV3 */
+
 int board_early_init_f(void)
 {
 	SETUP_IOMUX_PADS(uart4_pads);
@@ -105,6 +213,11 @@ int board_init(void)
 #ifdef CONFIG_NAND_MXS
 	setup_gpmi_nand();
 #endif
+
+#ifdef CONFIG_VIDEO_IPUV3
+	setup_display();
+#endif
+
 	return 0;
 }
 

configs/imx6qdl_icore_mmc_defconfig

@@ -33,6 +33,9 @@ CONFIG_MXC_UART=y
 CONFIG_IMX_THERMAL=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y
+CONFIG_VIDEO=y
+CONFIG_VIDEO_IPUV3=y
+CONFIG_SYS_CONSOLE_IS_IN_ENV=y
 CONFIG_SPL_LIBDISK_SUPPORT=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y

configs/imx6qdl_icore_nand_defconfig

@@ -29,6 +29,9 @@ CONFIG_IMX_THERMAL=y
 # CONFIG_DM_MMC_OPS is not set
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y
+CONFIG_VIDEO=y
+CONFIG_VIDEO_IPUV3=y
+CONFIG_SYS_CONSOLE_IS_IN_ENV=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_SPL_SERIAL_SUPPORT=y

include/configs/imx6qdl_icore.h

@@ -149,6 +149,18 @@
 # define CONFIG_PHY_SMSC
 #endif
 
+/* Framebuffer */
+#ifdef CONFIG_VIDEO_IPUV3
+# define CONFIG_IPUV3_CLK		260000000
+# define CONFIG_IMX_VIDEO_SKIP
+
+# define CONFIG_SPLASH_SCREEN
+# define CONFIG_BMP_16BPP
+# define CONFIG_VIDEO_BMP_RLE8
+# define CONFIG_VIDEO_LOGO
+# define CONFIG_VIDEO_BMP_LOGO
+#endif
+
 /* SPL */
 #ifdef CONFIG_SPL
 # ifdef CONFIG_NAND_MXS