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media: aspeed: refine to avoid full jpeg update

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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@aspeedtech.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Jammy Huang 2021-09-14 11:49:20 +02:00 committed by Mauro Carvalho Chehab
parent 83ffdc3292
commit 164646a785
1 changed files with 16 additions and 1 deletions
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17
drivers/media/platform/aspeed-video.c
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@ -422,6 +422,21 @@ 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)
{
@ -1289,7 +1304,7 @@ 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);