From: Tony K Nadackal <tony.kn@xxxxxxxxxxx>
This patch adds support for decoding 4:1:1 chroma subsampling in the
jpeg header parsing function.
Signed-off-by: Tony K Nadackal <tony.kn@xxxxxxxxxxx>
Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxxxxx>
Acked-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx>
Acked-by: Jacek Anaszewski <jacek.anaszewski@xxxxxxxxx>
---
drivers/media/platform/s5p-jpeg/jpeg-core.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 0783809..cca0fb8 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -1099,6 +1099,8 @@ static void skip(struct s5p_jpeg_buffer *buf, long len)
static bool s5p_jpeg_subsampling_decode(struct s5p_jpeg_ctx *ctx,
unsigned int subsampling)
{
+ unsigned int version;
+
switch (subsampling) {
case 0x11:
ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_444;
@@ -1112,6 +1114,19 @@ static bool s5p_jpeg_subsampling_decode(struct s5p_jpeg_ctx *ctx,
case 0x33:
ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY;
break;
+ case 0x41:
+ /*
+ * 4:1:1 subsampling only supported by 3250, 5420, and 5433
+ * variants
+ */
+ version = ctx->jpeg->variant->version;
+ if (version != SJPEG_EXYNOS3250 &&
+ version != SJPEG_EXYNOS5420 &&
+ version != SJPEG_EXYNOS5433)
+ return false;
+
+ ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_411;
+ break;
default:
return false;
}
--
2.7.4
