Hi Ajay,
+CC DT
On 06/27/2014 12:12 PM, Ajay Kumar wrote:
> Add the missing setting for DP CLKCON register.
>
> This register is present on Exynos5 based FIMD controllers,
> and needs to be set if we are using DP.
>
> Signed-off-by: Ajay Kumar <ajaykumar.rs@xxxxxxxxxxx>
> ---
> .../devicetree/bindings/video/samsung-fimd.txt | 1 +
> drivers/gpu/drm/exynos/exynos_drm_fimd.c | 23 ++++++++++++++++++++
> include/video/samsung_fimd.h | 4 ++++
> 3 files changed, 28 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/video/samsung-fimd.txt b/Documentation/devicetree/bindings/video/samsung-fimd.txt
> index 2dad41b..12f3d7a 100644
> --- a/Documentation/devicetree/bindings/video/samsung-fimd.txt
> +++ b/Documentation/devicetree/bindings/video/samsung-fimd.txt
> @@ -41,6 +41,7 @@ Optional Properties:
> - samsung,power-domain: a phandle to FIMD power domain node.
> - samsung,invert-vden: video enable signal is inverted
> - samsung,invert-vclk: video clock signal is inverted
> +- samsung,output-type: Type of display output interface(DPI=0, DSI=1, DP=2)
There is no point in introducing this property. Exynos DRM have already
logic which creates pipeline: fimd --> DPI|DSI|DP, this logic can be
reused to determine display type. It can be done even without any
additional callbacks, just by checking if there is connector of
DRM_MODE_CONNECTOR_eDP type connected to fimd.
Regards
Andrzej
> - display-timings: timing settings for FIMD, as described in document [1].
> Can be used in case timings cannot be provided otherwise
> or to override timings provided by the panel.
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> index 33161ad..aa74e90 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> @@ -72,6 +72,7 @@ struct fimd_driver_data {
> unsigned int has_shadowcon:1;
> unsigned int has_clksel:1;
> unsigned int has_limited_fmt:1;
> + unsigned int has_dp_clkcon:1;
> };
>
> static struct fimd_driver_data s3c64xx_fimd_driver_data = {
> @@ -88,6 +89,13 @@ static struct fimd_driver_data exynos4_fimd_driver_data = {
> static struct fimd_driver_data exynos5_fimd_driver_data = {
> .timing_base = 0x20000,
> .has_shadowcon = 1,
> + .has_dp_clkcon = 1,
> +};
> +
> +enum exynos_fimd_output_type {
> + EXYNOS_FIMD_OUTPUT_DPI,
> + EXYNOS_FIMD_OUTPUT_DSI,
> + EXYNOS_FIMD_OUTPUT_DP,
> };
>
> struct fimd_win_data {
> @@ -125,6 +133,8 @@ struct fimd_context {
> struct exynos_drm_panel_info panel;
> struct fimd_driver_data *driver_data;
> struct exynos_drm_display *display;
> +
> + enum exynos_fimd_output_type exynos_fimd_output_type;
> };
>
> static const struct of_device_id fimd_driver_dt_match[] = {
> @@ -331,6 +341,10 @@ static void fimd_commit(struct exynos_drm_manager *mgr)
> if (clkdiv > 1)
> val |= VIDCON0_CLKVAL_F(clkdiv - 1) | VIDCON0_CLKDIR;
>
> + if (ctx->driver_data->has_dp_clkcon &&
> + ctx->exynos_fimd_output_type == EXYNOS_FIMD_OUTPUT_DP)
> + writel(DP_CLK_ENABLE, ctx->regs + DP_CLKCON);
> +
> writel(val, ctx->regs + VIDCON0);
> }
>
> @@ -924,6 +938,7 @@ static int fimd_probe(struct platform_device *pdev)
> struct device *dev = &pdev->dev;
> struct fimd_context *ctx;
> struct resource *res;
> + u32 fimd_output_type;
> int ret = -EINVAL;
>
> ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC,
> @@ -949,6 +964,14 @@ static int fimd_probe(struct platform_device *pdev)
> ctx->vidcon1 |= VIDCON1_INV_VDEN;
> if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
> ctx->vidcon1 |= VIDCON1_INV_VCLK;
> + if (!of_property_read_u32(dev->of_node, "samsung,output-type",
> + &fimd_output_type)) {
> + if ((fimd_output_type < EXYNOS_FIMD_OUTPUT_DPI) ||
> + (fimd_output_type > EXYNOS_FIMD_OUTPUT_DP))
> + dev_err(dev, "invalid output type for FIMD\n");
> + else
> + ctx->exynos_fimd_output_type = fimd_output_type;
> + }
>
> ctx->bus_clk = devm_clk_get(dev, "fimd");
> if (IS_ERR(ctx->bus_clk)) {
> 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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