drm/sti: fix GDP size to support up to UHD resolution

[Lee Jones]

On Thu, 23 Mar 2017, Vincent Abriou wrote:
> On stih407-410 chip family the GDP layers are able to support up to UHD
> resolution (3840 x 2160).
> 
> Signed-off-by: Vincent Abriou <vincent.abriou at st.com>
> ---
>  drivers/gpu/drm/sti/sti_gdp.c | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)

Please ensure this patch makes its way into v4.12.  Without it, large 
monitors will be artificially clipped, which negatively affects the
user experience.

Acked-by: Lee Jones <lee.jones at linaro.org>
Tested-by: Lee Jones <lee.jones at linaro.org>

> diff --git a/drivers/gpu/drm/sti/sti_gdp.c b/drivers/gpu/drm/sti/sti_gdp.c
> index 86279f5..88f16cd 100644
> --- a/drivers/gpu/drm/sti/sti_gdp.c
> +++ b/drivers/gpu/drm/sti/sti_gdp.c
> @@ -66,7 +66,9 @@ static struct gdp_format_to_str {
>  #define GAM_GDP_ALPHARANGE_255  BIT(5)
>  #define GAM_GDP_AGC_FULL_RANGE  0x00808080
>  #define GAM_GDP_PPT_IGNORE      (BIT(1) | BIT(0))
> -#define GAM_GDP_SIZE_MAX        0x7FF
> +
> +#define GAM_GDP_SIZE_MAX_WIDTH  3840
> +#define GAM_GDP_SIZE_MAX_HEIGHT 2160
>  
>  #define GDP_NODE_NB_BANK        2
>  #define GDP_NODE_PER_FIELD      2
> @@ -632,8 +634,8 @@ static int sti_gdp_atomic_check(struct drm_plane *drm_plane,
>  	/* src_x are in 16.16 format */
>  	src_x = state->src_x >> 16;
>  	src_y = state->src_y >> 16;
> -	src_w = clamp_val(state->src_w >> 16, 0, GAM_GDP_SIZE_MAX);
> -	src_h = clamp_val(state->src_h >> 16, 0, GAM_GDP_SIZE_MAX);
> +	src_w = clamp_val(state->src_w >> 16, 0, GAM_GDP_SIZE_MAX_WIDTH);
> +	src_h = clamp_val(state->src_h >> 16, 0, GAM_GDP_SIZE_MAX_HEIGHT);
>  
>  	format = sti_gdp_fourcc2format(fb->format->format);
>  	if (format == -1) {
> @@ -741,8 +743,8 @@ static void sti_gdp_atomic_update(struct drm_plane *drm_plane,
>  	/* src_x are in 16.16 format */
>  	src_x = state->src_x >> 16;
>  	src_y = state->src_y >> 16;
> -	src_w = clamp_val(state->src_w >> 16, 0, GAM_GDP_SIZE_MAX);
> -	src_h = clamp_val(state->src_h >> 16, 0, GAM_GDP_SIZE_MAX);
> +	src_w = clamp_val(state->src_w >> 16, 0, GAM_GDP_SIZE_MAX_WIDTH);
> +	src_h = clamp_val(state->src_h >> 16, 0, GAM_GDP_SIZE_MAX_HEIGHT);
>  
>  	list = sti_gdp_get_free_nodes(gdp);
>  	top_field = list->top_field;

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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