Despite what the HVS documentation indicates, the VC4 does not actually
support SAND tiling modes for any RGB format and only semiplanar YUV420
formats (NV12/NV21) can be used in these tiling modes.

The driver currently claims to support RGB formats for the associated
modifiers, so remove them from the supported list in the
format_mod_supported helper for RGB formats.

Remove further checks that are no longer necessary along the way, since
semi-planar YUV420 formats support every SAND tiling mode.

Signed-off-by: Paul Kocialkowski <paul.kocialkow...@bootlin.com>
---
 drivers/gpu/drm/vc4/vc4_plane.c | 17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
index 75db62cbe468..a176e7d8af27 100644
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -596,20 +596,7 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
        case DRM_FORMAT_MOD_BROADCOM_SAND256: {
                uint32_t param = fourcc_mod_broadcom_param(fb->modifier);
 
-               /* Column-based NV12 or RGBA.
-                */
-               if (fb->format->num_planes > 1) {
-                       if (hvs_format != HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE) 
{
-                               DRM_DEBUG_KMS("SAND format only valid for 
NV12/21");
-                               return -EINVAL;
-                       }
-                       hvs_format = HVS_PIXEL_FORMAT_H264;
-               } else {
-                       if (base_format_mod == DRM_FORMAT_MOD_BROADCOM_SAND256) 
{
-                               DRM_DEBUG_KMS("SAND256 format only valid for 
H.264");
-                               return -EINVAL;
-                       }
-               }
+               hvs_format = HVS_PIXEL_FORMAT_H264;
 
                switch (base_format_mod) {
                case DRM_FORMAT_MOD_BROADCOM_SAND64:
@@ -1050,8 +1037,6 @@ static bool vc4_format_mod_supported(struct drm_plane 
*plane,
                switch (fourcc_mod_broadcom_mod(modifier)) {
                case DRM_FORMAT_MOD_LINEAR:
                case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED:
-               case DRM_FORMAT_MOD_BROADCOM_SAND64:
-               case DRM_FORMAT_MOD_BROADCOM_SAND128:
                        return true;
                default:
                        return false;
-- 
2.19.2

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