Am 26.06.2014 16:36, schrieb Ajay Kumar:
> Add the missing setting for DP CLKCON register.
>
> This register is present on Exynos5 based FIMD controllers,
> and needs to be used if we are using DP.
>
> Signed-off-by: Ajay Kumar <ajaykumar.rs@xxxxxxxxxxx>
> ---
> Changes since V1:
> - Remove usage of driver_data to configure DP CLKCON register
> drivers/gpu/drm/exynos/exynos_dp_core.c | 2 ++
> drivers/gpu/drm/exynos/exynos_drm_drv.h | 8 ++++++++
> drivers/gpu/drm/exynos/exynos_drm_fimd.c | 5 +++++
> include/video/samsung_fimd.h | 4 ++++
> 4 files changed, 19 insertions(+)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c
> index 2e77a15..d8868f3 100644
> --- a/drivers/gpu/drm/exynos/exynos_dp_core.c
> +++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
> @@ -1336,6 +1336,8 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
>
> platform_set_drvdata(pdev, &exynos_dp_display);
>
> + exynos_fimd_output_type = EXYNOS_FIMD_OUTPUT_DP;
> +
> return exynos_drm_create_enc_conn(drm_dev, &exynos_dp_display);
> }
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> index 36535f3..1089744 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> @@ -60,6 +60,12 @@ enum exynos_drm_output_type {
> EXYNOS_DISPLAY_TYPE_VIDI,
> };
>
> +enum exynos_fimd_output_type {
> + EXYNOS_FIMD_OUTPUT_MIPI,
> + EXYNOS_FIMD_OUTPUT_DPI,
> + EXYNOS_FIMD_OUTPUT_DP,
> +};
> +
> /*
> * Exynos drm common overlay structure.
> *
> @@ -380,4 +386,6 @@ extern struct platform_driver fimc_driver;
> extern struct platform_driver rotator_driver;
> extern struct platform_driver gsc_driver;
> extern struct platform_driver ipp_driver;
> +
> +extern enum exynos_fimd_output_type exynos_fimd_output_type;
> #endif
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> index bb45ab2..a46a9c4 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> @@ -90,6 +90,8 @@ static struct fimd_driver_data exynos5_fimd_driver_data = {
> .has_shadowcon = 1,
> };
>
> +enum exynos_fimd_output_type exynos_fimd_output_type;
This is a non-static variable - doesn't that mean it's only ever
initialized to DP above and uninitialized in C99 otherwise? Unless I'm
missing something, the if below may trigger at random.
Regards,
Andreas
> +
> struct fimd_win_data {
> unsigned int offset_x;
> unsigned int offset_y;
> @@ -331,6 +333,9 @@ static void fimd_commit(struct exynos_drm_manager *mgr)
> if (clkdiv > 1)
> val |= VIDCON0_CLKVAL_F(clkdiv - 1) | VIDCON0_CLKDIR;
>
> + if (exynos_fimd_output_type == EXYNOS_FIMD_OUTPUT_DP)
> + writel(DP_CLK_ENABLE, ctx->regs + DP_CLKCON);
> +
> writel(val, ctx->regs + VIDCON0);
> }
>
> diff --git a/include/video/samsung_fimd.h b/include/video/samsung_fimd.h
> index b039320..d8f4b0b 100644
> --- a/include/video/samsung_fimd.h
> +++ b/include/video/samsung_fimd.h
> @@ -435,6 +435,10 @@
> #define BLENDCON_NEW_8BIT_ALPHA_VALUE (1 << 0)
> #define BLENDCON_NEW_4BIT_ALPHA_VALUE (0 << 0)
>
> +/* Video clock enable for DP */
> +#define DP_CLKCON 0x27C
> +#define DP_CLK_ENABLE 0x2
> +
> /* Notes on per-window bpp settings
> *
> * Value Win0 Win1 Win2 Win3 Win 4
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