[media] s5p-jpeg: Ensure setting correct value of the chroma subsampling control
Exynos4x12 has limitations regarding setting chroma subsampling of an output JPEG image. It cannot be lower than the subsampling of the raw source image. Also in case of V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY option the source image fourcc has to be V4L2_PIX_FMT_GREY. This patch implements try_ctrl callback containing mechanism that prevents setting invalid value of the V4L2_CID_JPEG_CHROMA_SUBSAMPLING control. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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