drm/i915/skl: Support the advertized index format

We advertize C8 in the primary plane formats didn't have the
corresponding code to set PLANE_CTL accordingly.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 49d7227..dadb52a 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2956,6 +2956,9 @@ u32 skl_plane_ctl_format(uint32_t pixel_format)
        u32 format = 0;
 
        switch (pixel_format) {
+       case DRM_FORMAT_C8:
+               format = PLANE_CTL_FORMAT_INDEXED;
+               break;
        case DRM_FORMAT_RGB565:
                format = PLANE_CTL_FORMAT_RGB_565;
                break;