Returning a 0 bpp/cpp value from these functions isn't ever valid. In many cases it can also lead to a div-by-zero possibly at some later point in time, so make sure we catch such errors as soon as possible via louder error reporting.
CC: Dave Airlie airlied@redhat.com Signed-off-by: Imre Deak imre.deak@intel.com --- drivers/gpu/drm/drm_crtc.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 70f9c68..3a32606 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -5610,8 +5610,8 @@ void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, *bpp = 32; break; default: - DRM_DEBUG_KMS("unsupported pixel format %s\n", - drm_get_format_name(format)); + WARN(1, "unsupported pixel format %s\n", + drm_get_format_name(format)); *depth = 0; *bpp = 0; break; @@ -5666,8 +5666,12 @@ int drm_format_plane_cpp(uint32_t format, int plane) unsigned int depth; int bpp;
- if (plane >= drm_format_num_planes(format)) + if (plane >= drm_format_num_planes(format)) { + WARN(1, "invalid plane %d for format %s\n", + plane, drm_get_format_name(format)); + return 0; + }
switch (format) { case DRM_FORMAT_YUYV: