drm/i915: Rewrite icl_min_plane_width()

Replace the ginormous switch statement in icl_plane_min_width() with
simple arithmetic.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20251009211313.30234-2-ville.syrjala@linux.intel.com
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>

diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
index 765d288cce2b0790ac322042fd8b3af5ad019398..e16e42baf86c588e7fd8a3840e12d9100191013f 100644 (file)
--- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
+++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
@@ -394,40 +394,17 @@ static int icl_plane_min_width(const struct drm_framebuffer *fb,
                               int color_plane,
                               unsigned int rotation)
 {
+       int min_width;
+
+       min_width = 16 / fb->format->cpp[color_plane];
+
        /* Wa_14011264657, Wa_14011050563: gen11+ */
-       switch (fb->format->format) {
-       case DRM_FORMAT_C8:
-               return 18;
-       case DRM_FORMAT_RGB565:
-               return 10;
-       case DRM_FORMAT_XRGB8888:
-       case DRM_FORMAT_XBGR8888:
-       case DRM_FORMAT_ARGB8888:
-       case DRM_FORMAT_ABGR8888:
-       case DRM_FORMAT_XRGB2101010:
-       case DRM_FORMAT_XBGR2101010:
-       case DRM_FORMAT_ARGB2101010:
-       case DRM_FORMAT_ABGR2101010:
-       case DRM_FORMAT_XVYU2101010:
-       case DRM_FORMAT_Y212:
-       case DRM_FORMAT_Y216:
-               return 6;
-       case DRM_FORMAT_NV12:
-               return 20;
-       case DRM_FORMAT_P010:
-       case DRM_FORMAT_P012:
-       case DRM_FORMAT_P016:
-               return 12;
-       case DRM_FORMAT_XRGB16161616F:
-       case DRM_FORMAT_XBGR16161616F:
-       case DRM_FORMAT_ARGB16161616F:
-       case DRM_FORMAT_ABGR16161616F:
-       case DRM_FORMAT_XVYU12_16161616:
-       case DRM_FORMAT_XVYU16161616:
-               return 4;
-       default:
-               return 1;
-       }
+       if (intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier))
+               min_width += 4;
+       else
+               min_width += 2;
+
+       return min_width;
 }
 
 static int xe3_plane_max_width(const struct drm_framebuffer *fb,