[U-Boot] [PATCH] imx: mx6qsabreauto: support lvds display

[Peng Fan]

Move setup_display from board_early_init_f to board_init.
Add more clock settings.
Add blacklight iomux setting.
Add display_info_t info for the lvds screen.

Signed-off-by: Peng Fan <Peng.Fan at freescale.com>
Cc: Fabio Estevam <fabio.estevam at freescale.com>
Cc: Stefano Babic <sbabic at denx.de>
---
 board/freescale/mx6qsabreauto/mx6qsabreauto.c | 87 ++++++++++++++++++++++++++-
 1 file changed, 84 insertions(+), 3 deletions(-)

diff --git a/board/freescale/mx6qsabreauto/mx6qsabreauto.c b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
index 7c0e90a..c2e9c57 100644
--- a/board/freescale/mx6qsabreauto/mx6qsabreauto.c
+++ b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
@@ -412,14 +412,44 @@ u32 get_board_rev(void)
 }
 
 #if defined(CONFIG_VIDEO_IPUV3)
+static void disable_lvds(struct display_info_t const *dev)
+{
+	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
+
+	clrbits_le32(&iomux->gpr[2],
+		     IOMUXC_GPR2_LVDS_CH0_MODE_MASK |
+		     IOMUXC_GPR2_LVDS_CH1_MODE_MASK);
+}
+
 static void do_enable_hdmi(struct display_info_t const *dev)
 {
+	disable_lvds(dev);
 	imx_enable_hdmi_phy();
 }
 
 struct display_info_t const displays[] = {{
 	.bus	= -1,
 	.addr	= 0,
+	.pixfmt	= IPU_PIX_FMT_RGB666,
+	.detect	= NULL,
+	.enable	= NULL,
+	.mode	= {
+		.name           = "Hannstar-XGA",
+		.refresh        = 60,
+		.xres           = 1024,
+		.yres           = 768,
+		.pixclock       = 15385,
+		.left_margin    = 220,
+		.right_margin   = 40,
+		.upper_margin   = 21,
+		.lower_margin   = 7,
+		.hsync_len      = 60,
+		.vsync_len      = 10,
+		.sync           = FB_SYNC_EXT,
+		.vmode          = FB_VMODE_NONINTERLACED
+} }, {
+	.bus	= -1,
+	.addr	= 0,
 	.pixfmt	= IPU_PIX_FMT_RGB24,
 	.detect	= detect_hdmi,
 	.enable	= do_enable_hdmi,
@@ -440,18 +470,69 @@ struct display_info_t const displays[] = {{
 } } };
 size_t display_count = ARRAY_SIZE(displays);
 
+iomux_v3_cfg_t const backlight_pads[] = {
+	MX6_PAD_SD4_DAT1__GPIO2_IO09 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+};
+
+static void setup_iomux_backlight(void)
+{
+	gpio_direction_output(IMX_GPIO_NR(2, 9), 1);
+	imx_iomux_v3_setup_multiple_pads(backlight_pads,
+					 ARRAY_SIZE(backlight_pads));
+}
+
 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;
 
+	setup_iomux_backlight();
 	enable_ipu_clock();
 	imx_setup_hdmi();
 
+	/* Turn on LDB_DI0 and LDB_DI1 clocks */
+	reg = readl(&mxc_ccm->CCGR3);
+	reg |= MXC_CCM_CCGR3_LDB_DI0_MASK | MXC_CCM_CCGR3_LDB_DI1_MASK;
+	writel(reg, &mxc_ccm->CCGR3);
+
+	/* Set LDB_DI0 and LDB_DI1 clk select to 3b'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 | MXC_CCM_CSCMR2_LDB_DI1_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);
+	reg |= (CHSCCDR_CLK_SEL_LDB_DI0 <<
+		MXC_CCM_CHSCCDR_IPU1_DI1_CLK_SEL_OFFSET);
 	writel(reg, &mxc_ccm->chsccdr);
+
+	reg = IOMUXC_GPR2_DI1_VS_POLARITY_ACTIVE_LOW |
+	      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_CH0_MODE_ENABLED_DI0 |
+	      IOMUXC_GPR2_LVDS_CH1_MODE_DISABLED;
+	writel(reg, &iomux->gpr[2]);
+
+	reg = readl(&iomux->gpr[3]);
+	reg &= ~(IOMUXC_GPR3_LVDS0_MUX_CTL_MASK |
+		 IOMUXC_GPR3_HDMI_MUX_CTL_MASK);
+	reg |= (IOMUXC_GPR3_MUX_SRC_IPU1_DI0 <<
+		IOMUXC_GPR3_LVDS0_MUX_CTL_OFFSET) |
+	       (IOMUXC_GPR3_MUX_SRC_IPU1_DI0 <<
+		IOMUXC_GPR3_HDMI_MUX_CTL_OFFSET);
+	writel(reg, &iomux->gpr[3]);
 }
 #endif /* CONFIG_VIDEO_IPUV3 */
 
@@ -467,9 +548,6 @@ int overwrite_console(void)
 int board_early_init_f(void)
 {
 	setup_iomux_uart();
-#ifdef CONFIG_VIDEO_IPUV3
-	setup_display();
-#endif
 
 #ifdef CONFIG_NAND_MXS
 	setup_gpmi_nand();
@@ -494,6 +572,9 @@ int board_init(void)
 	gpio_direction_output(IMX_GPIO_NR(1, 15), 1);
 	imx_iomux_v3_setup_multiple_pads(port_exp, ARRAY_SIZE(port_exp));
 
+#ifdef CONFIG_VIDEO_IPUV3
+	setup_display();
+#endif
 	setup_iomux_eimnor();
 	return 0;
 }
-- 
2.6.2