The switch of jpeg 420/444 subsampling will update full jpeg header for
aspeed now.
Just update the 420/444 subsampling part of jpeg header is fine.
Signed-off-by: Jammy Huang <jammy_huang@xxxxxxxxxxxxxx>
---
resend the patch becuase cc-list isn't complete.
drivers/media/platform/aspeed-video.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c
index 3c90f3f3cf14..8b3939b8052d 100644
--- a/drivers/media/platform/aspeed-video.c
+++ b/drivers/media/platform/aspeed-video.c
@@ -401,6 +401,21 @@ static void aspeed_video_init_jpeg_table(u32 *table, bool yuv420)
}
}
+// just update jpeg dct table per 420/444
+static void aspeed_video_update_jpeg_table(u32 *table, bool yuv420)
+{
+ int i;
+ unsigned int base;
+
+ for (i = 0; i < ASPEED_VIDEO_JPEG_NUM_QUALITIES; i++) {
+ base = 256 * i; /* AST HW requires this header spacing */
+ base += ASPEED_VIDEO_JPEG_HEADER_SIZE +
+ ASPEED_VIDEO_JPEG_DCT_SIZE;
+
+ table[base + 2] = (yuv420) ? 0x00220103 : 0x00110103;
+ }
+}
+
static void aspeed_video_update(struct aspeed_video *video, u32 reg, u32 clear,
u32 bits)
{
@@ -1274,7 +1289,7 @@ static void aspeed_video_update_jpeg_quality(struct aspeed_video *video)
static void aspeed_video_update_subsampling(struct aspeed_video *video)
{
if (video->jpeg.virt)
- aspeed_video_init_jpeg_table(video->jpeg.virt, video->yuv420);
+ aspeed_video_update_jpeg_table(video->jpeg.virt, video->yuv420);
if (video->yuv420)
aspeed_video_update(video, VE_SEQ_CTRL, 0, VE_SEQ_CTRL_YUV420);
--
2.25.1
