Not all possible format conversions are supported yet. Print a warning on unsupported combinations. Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> --- drivers/gpu/drm/drm_format_helper.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index 0e7135114728..b648f29b21b6 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -590,6 +590,9 @@ int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_for } } + drm_warn_once(fb->dev, "No conversion helper from %p4cc to %p4cc found.\n", + &fb_format, &dst_format); + return -EINVAL; } EXPORT_SYMBOL(drm_fb_blit_toio); -- 2.35.1
