If a plane supports a pixel format and the framebuffer does not pass any
modifiers, then drm_plane_check_pixel_format() should always return true
for the given format regardless of whether the plane supports any
modifiers or not.

Signed-off-by: Ayan Kumar Halder <ayan.hal...@arm.com>
---
 drivers/gpu/drm/drm_plane.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 6d2a6e4..873c084 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -564,6 +564,9 @@ int drm_plane_check_pixel_format(struct drm_plane *plane,
        if (!plane->modifier_count)
                return 0;
 
+       if (modifier == DRM_FORMAT_MOD_NONE)
+               return 0;
+
        for (i = 0; i < plane->modifier_count; i++) {
                if (modifier == plane->modifiers[i])
                        break;
-- 
2.7.4

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