[U-Boot] [PATCH v2 1/4] mx6cuboxi: Add HDMI output support

[Fabio Estevam]

From: Fabio Estevam <fabio.estevam at freescale.com>

Add HDMI output using PLL5 as the source for the IPU clocks,
and accurate VESA timings.

These settings are based on the patch from Soeren Moch <smoch at web.de>
submitted for the tbs2910 mx6 based board.

It allows the display to work properly at 1024x768 at 60.

This should make the hdmi output signal compatible with most if not all
modern displays.

Signed-off-by: Jon Nettleton <jon.nettleton at gmail.com>
Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
Reviewed-by: Tom Rini <trini at konsulko.com>
Tested-by: Tom Rini <trini at konsulko.com>
---
Changes since v1:
- None

 board/solidrun/mx6cuboxi/mx6cuboxi.c | 101 ++++++++++++++++++++++++++++++++++-
 include/configs/mx6cuboxi.h          |  18 ++++++-
 2 files changed, 117 insertions(+), 2 deletions(-)

diff --git a/board/solidrun/mx6cuboxi/mx6cuboxi.c b/board/solidrun/mx6cuboxi/mx6cuboxi.c
index d3a32c1..eab92f1 100644
--- a/board/solidrun/mx6cuboxi/mx6cuboxi.c
+++ b/board/solidrun/mx6cuboxi/mx6cuboxi.c
@@ -18,9 +18,11 @@
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/iomux.h>
 #include <asm/arch/mx6-pins.h>
+#include <asm/arch/mxc_hdmi.h>
 #include <asm/errno.h>
 #include <asm/gpio.h>
 #include <asm/imx-common/iomux-v3.h>
+#include <asm/imx-common/video.h>
 #include <mmc.h>
 #include <fsl_esdhc.h>
 #include <miiphy.h>
@@ -159,10 +161,107 @@ int board_eth_init(bd_t *bis)
 	return cpu_eth_init(bis);
 }
 
+#ifdef CONFIG_VIDEO_IPUV3
+static void do_enable_hdmi(struct display_info_t const *dev)
+{
+	imx_enable_hdmi_phy();
+}
+
+struct display_info_t const displays[] = {
+	{
+		.bus	= -1,
+		.addr	= 0,
+		.pixfmt	= IPU_PIX_FMT_RGB24,
+		.detect	= detect_hdmi,
+		.enable	= do_enable_hdmi,
+		.mode	= {
+			.name           = "HDMI",
+			/* 1024x768 at 60Hz (VESA)*/
+			.refresh        = 60,
+			.xres           = 1024,
+			.yres           = 768,
+			.pixclock       = 15384,
+			.left_margin    = 160,
+			.right_margin   = 24,
+			.upper_margin   = 29,
+			.lower_margin   = 3,
+			.hsync_len      = 136,
+			.vsync_len      = 6,
+			.sync           = FB_SYNC_EXT,
+			.vmode          = FB_VMODE_NONINTERLACED
+		}
+	}
+};
+
+size_t display_count = ARRAY_SIZE(displays);
+
+static int setup_display(void)
+{
+	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+	int reg;
+	int timeout = 100000;
+
+	enable_ipu_clock();
+	imx_setup_hdmi();
+
+	/* set video pll to 455MHz (24MHz * (37+11/12) / 2) */
+	setbits_le32(&ccm->analog_pll_video, BM_ANADIG_PLL_VIDEO_POWERDOWN);
+
+	reg = readl(&ccm->analog_pll_video);
+	reg &= ~BM_ANADIG_PLL_VIDEO_DIV_SELECT;
+	reg |= BF_ANADIG_PLL_VIDEO_DIV_SELECT(37);
+	reg &= ~BM_ANADIG_PLL_VIDEO_POST_DIV_SELECT;
+	reg |= BF_ANADIG_PLL_VIDEO_POST_DIV_SELECT(1);
+	writel(reg, &ccm->analog_pll_video);
+
+	writel(BF_ANADIG_PLL_VIDEO_NUM_A(11), &ccm->analog_pll_video_num);
+	writel(BF_ANADIG_PLL_VIDEO_DENOM_B(12), &ccm->analog_pll_video_denom);
+
+	reg &= ~BM_ANADIG_PLL_VIDEO_POWERDOWN;
+	writel(reg, &ccm->analog_pll_video);
+
+	while (timeout--)
+		if (readl(&ccm->analog_pll_video) & BM_ANADIG_PLL_VIDEO_LOCK)
+			break;
+	if (timeout < 0) {
+		printf("Warning: video pll lock timeout!\n");
+		return -ETIMEDOUT;
+	}
+
+	reg = readl(&ccm->analog_pll_video);
+	reg |= BM_ANADIG_PLL_VIDEO_ENABLE;
+	reg &= ~BM_ANADIG_PLL_VIDEO_BYPASS;
+	writel(reg, &ccm->analog_pll_video);
+
+	/* gate ipu1_di0_clk */
+	clrbits_le32(&ccm->CCGR3, MXC_CCM_CCGR3_LDB_DI0_MASK);
+
+	/* select video_pll clock / 7  for ipu1_di0_clk -> 65MHz pixclock */
+	reg = readl(&ccm->chsccdr);
+	reg &= ~(MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_MASK |
+		 MXC_CCM_CHSCCDR_IPU1_DI0_PODF_MASK |
+		 MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_MASK);
+	reg |= (2 << MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_OFFSET) |
+	       (6 << MXC_CCM_CHSCCDR_IPU1_DI0_PODF_OFFSET) |
+	       (0 << MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_OFFSET);
+	writel(reg, &ccm->chsccdr);
+
+	/* enable ipu1_di0_clk */
+	setbits_le32(&ccm->CCGR3, MXC_CCM_CCGR3_LDB_DI0_MASK);
+
+	return 0;
+}
+#endif /* CONFIG_VIDEO_IPUV3 */
+
 int board_early_init_f(void)
 {
+	int ret = 0;
 	setup_iomux_uart();
-	return 0;
+
+#ifdef CONFIG_VIDEO_IPUV3
+	ret = setup_display();
+#endif
+	return ret;
 }
 
 int board_init(void)
diff --git a/include/configs/mx6cuboxi.h b/include/configs/mx6cuboxi.h
index b569f34..207a2a6 100644
--- a/include/configs/mx6cuboxi.h
+++ b/include/configs/mx6cuboxi.h
@@ -27,7 +27,7 @@
 #define CONFIG_IMX6_THERMAL
 #define CONFIG_SYS_GENERIC_BOARD
 
-#define CONFIG_SYS_MALLOC_LEN		(2 * SZ_1M)
+#define CONFIG_SYS_MALLOC_LEN		(10 * SZ_1M)
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_BOARD_LATE_INIT
 #define CONFIG_MXC_GPIO
@@ -66,6 +66,22 @@
 #define CONFIG_CONS_INDEX		1
 #define CONFIG_BAUDRATE			115200
 
+/* Framebuffer */
+#define CONFIG_VIDEO
+#define CONFIG_VIDEO_IPUV3
+#define CONFIG_IPUV3_CLK		260000000
+#define CONFIG_CFB_CONSOLE
+#define CONFIG_VGA_AS_SINGLE_DEVICE
+#define CONFIG_SYS_CONSOLE_IS_IN_ENV
+#define CONFIG_VIDEO_BMP_RLE8
+#define CONFIG_SPLASH_SCREEN
+#define CONFIG_SPLASH_SCREEN_ALIGN
+#define CONFIG_BMP_16BPP
+#define CONFIG_VIDEO_LOGO
+#define CONFIG_VIDEO_BMP_LOGO
+#define CONFIG_IMX_HDMI
+#define CONFIG_IMX_VIDEO_SKIP
+
 #define CONFIG_SYS_NO_FLASH
 
 /* Command definition */
-- 
1.9.1