[PATCH v4] drm/mediatek: Add AFBC support to Mediatek DRM driver

[AngeloGioacchino Del Regno]

Il 13/10/22 21:31, Justin Green ha scritto:
> Tested on MT8195 and confirmed both correct video output and improved DRAM
> bandwidth performance.
> 
> v4:
> * Move modifier validation to format_mod_supported function.
> * Add modifiers to drm_universal_plane_init() call.
> * Make comparisons to DRM_FORMAT_MOD_LINEAR explicit rather than relying on
>    DRM_FORMAT_LINEAR being equal to 0.
> * Gate AFBC control bit writes on device compatibility.
> 
> v3:
> * Replaced pitch bitshift math with union based approach.
> * Refactored overlay register writes to shared code between non-AFBC and
>    AFBC.
> * Minor code cleanups.
> 
> v2:
> * Marked mtk_ovl_set_afbc as static.
> * Reflowed some lines to fit column limit.
> 
> Signed-off-by: Justin Green <greenjustin at chromium.org>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>