Since all the RGB input formats have the same value for the DATA_FMT
field of the INPUT_FMT register, we can group them when the format is
known to be RGB. Here, we assume that a non-YUV format is RGB, because
the hardware does not support any other colorspace than RGB and YUV.

Use the DRM format info structure to check whether the format uses a
YUV colorspace.

Signed-off-by: Paul Kocialkowski <paul.kocialkow...@bootlin.com>
---
 drivers/gpu/drm/sun4i/sun4i_frontend.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_frontend.c 
b/drivers/gpu/drm/sun4i/sun4i_frontend.c
index dd5af3019099..7c7a5ea0cf58 100644
--- a/drivers/gpu/drm/sun4i/sun4i_frontend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_frontend.c
@@ -108,14 +108,12 @@ static int
 sun4i_frontend_drm_format_to_input_fmt(const struct drm_format_info *format,
                                       u32 *val)
 {
-       switch (format->format) {
-       case DRM_FORMAT_XRGB8888:
+       if (!format->is_yuv)
                *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_RGB;
-               return 0;
-
-       default:
+       else
                return -EINVAL;
-       }
+
+       return 0;
 }
 
 static int
-- 
2.19.2

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