[U-Boot] [PATCH V3 1/1] i.MX6: mx6qsabrelite: Add splash screen support

[Eric Nelson]

On 09/19/2012 11:46 AM, Eric Nelson wrote:
> Adds support for the Hannstar 1024 x 768 LVDS panel (Freescale part
> number MCIMX-LVDS1) to SABRE-Lite board.
>
> Signed-off-by: Eric Nelson<eric.nelson at boundarydevices.com>
> ---
>   board/freescale/mx6qsabrelite/mx6qsabrelite.c |  102 +++++++++++++++++++++++++
>   include/configs/mx6qsabrelite.h               |   15 ++++-
>   2 files changed, 116 insertions(+), 1 deletions(-)
>
> diff --git a/board/freescale/mx6qsabrelite/mx6qsabrelite.c b/board/freescale/mx6qsabrelite/mx6qsabrelite.c
> index 4b4e89b..c42a6ab 100644
> --- a/board/freescale/mx6qsabrelite/mx6qsabrelite.c
> +++ b/board/freescale/mx6qsabrelite/mx6qsabrelite.c
> @@ -36,6 +36,9 @@
>   #include<micrel.h>
>   #include<miiphy.h>
>   #include<netdev.h>
> +#include<linux/fb.h>
> +#include<ipu_pixfmt.h>
> +#include<asm/arch/crm_regs.h>
>   DECLARE_GLOBAL_DATA_PTR;
>
>   #define UART_PAD_CTRL  (PAD_CTL_PKE | PAD_CTL_PUE |	       \
> @@ -195,6 +198,10 @@ static iomux_v3_cfg_t button_pads[] = {
>   	MX6Q_PAD_GPIO_18__GPIO_7_13	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
>   };
>
> +iomux_v3_cfg_t lcd_gpio[] = {
> +	MX6Q_PAD_SD1_CMD__GPIO_1_18 | MUX_PAD_CTRL(NO_PAD_CTRL),
> +};
> +
>   static void setup_iomux_enet(void)
>   {
>   	gpio_direction_output(IMX_GPIO_NR(3, 23), 0);
> @@ -372,14 +379,106 @@ int setup_sata(void)
>   }
>   #endif
>
> +static struct fb_videomode lvds_xga = {
> +	.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
> +};
> +
> +void lcd_iomux(void)
> +{
> +	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
> +	struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
> +	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
> +
> +	int reg;
> +
> +	/* Turn on GPIO backlight */
> +	imx_iomux_v3_setup_multiple_pads(lcd_gpio, ARRAY_SIZE(lcd_gpio));
> +	gpio_direction_output(18, 1);
> +
> +	/* Turn on LDB0,IPU,IPU DI0 clocks */
> +	reg = __raw_readl(&mxc_ccm->CCGR3);
> +	reg |=   MXC_CCM_CCGR3_IPU1_IPU_MASK
> +		|MXC_CCM_CCGR3_IPU1_IPU_DI0_MASK
> +		|MXC_CCM_CCGR3_LDB_DI0_MASK;
> +	writel(reg,&mxc_ccm->CCGR3);
> +
> +	/* set PFD1_FRAC to 0x13 == 455 MHz (480*18)/0x13 */
> +	writel(ANATOP_PFD_480_PFD1_FRAC_MASK,&anatop->pfd_480_clr);
> +	writel(0x13<<ANATOP_PFD_480_PFD1_FRAC_SHIFT,&anatop->pfd_480_set);
> +
> +	/* 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&= ~(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 |= (CHSCCDR_CLK_SEL_LDB_DI0
> +		<<MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_OFFSET)
> +	      |(CHSCCDR_PODF_DIVIDE_BY_3
> +		<<MXC_CCM_CHSCCDR_IPU1_DI0_PODF_OFFSET)
> +	      |(CHSCCDR_IPU_PRE_CLK_540M_PFD
> +		<<MXC_CCM_CHSCCDR_IPU1_DI0_PRE_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(0x201,&iomux->gpr[2]);

err.. reg?

If I spent that much time setting it up, I shoulda used it.

Looking more closely, I think GPR3 is also going to need some setup.