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[media] s5p-jpeg: add chroma subsampling adjustment for Exynos3250

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Take into account limitations specific to the Exynos3250 SoC,
regarding setting the chroma subsampling control's value.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Jacek Anaszewski 2014-07-11 12:19:48 -03:00 committed by Mauro Carvalho Chehab
parent 5a71671af3
commit 39c344c448
1 changed files with 38 additions and 21 deletions
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59
drivers/media/platform/s5p-jpeg/jpeg-core.c
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@ -1603,6 +1603,42 @@ static int s5p_jpeg_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
return 0;
}
static int s5p_jpeg_adjust_subs_ctrl(struct s5p_jpeg_ctx *ctx, int *ctrl_val)
{
switch (ctx->jpeg->variant->version) {
case SJPEG_S5P:
return 0;
case SJPEG_EXYNOS3250:
/*
* The exynos3250 device can produce JPEG image only
* of 4:4:4 subsampling when given RGB32 source image.
*/
if (ctx->out_q.fmt->fourcc == V4L2_PIX_FMT_RGB32)
*ctrl_val = 0;
break;
case SJPEG_EXYNOS4:
/*
* The exynos4x12 device requires input raw image fourcc
* to be V4L2_PIX_FMT_GREY if gray jpeg format
* is to be set.
*/
if (ctx->out_q.fmt->fourcc != V4L2_PIX_FMT_GREY &&
*ctrl_val == V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY)
return -EINVAL;
break;
}
/*
* The exynos4x12 and exynos3250 devices require resulting
* jpeg subsampling not to be lower than the input raw image
* subsampling.
*/
if (ctx->out_q.fmt->subsampling > *ctrl_val)
*ctrl_val = ctx->out_q.fmt->subsampling;
return 0;
}
static int s5p_jpeg_try_ctrl(struct v4l2_ctrl *ctrl)
{
struct s5p_jpeg_ctx *ctx = ctrl_to_ctx(ctrl);
@ -1611,28 +1647,9 @@ static int s5p_jpeg_try_ctrl(struct v4l2_ctrl *ctrl)
spin_lock_irqsave(&ctx->jpeg->slock, flags);
if (ctrl->id == V4L2_CID_JPEG_CHROMA_SUBSAMPLING) {
if (ctx->jpeg->variant->version == SJPEG_S5P)
goto error_free;
/*
* The exynos4x12 device requires input raw image fourcc
* to be V4L2_PIX_FMT_GREY if gray jpeg format
* is to be set.
*/
if (ctx->out_q.fmt->fourcc != V4L2_PIX_FMT_GREY &&
ctrl->val == V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY) {
ret = -EINVAL;
goto error_free;
}
/*
* The exynos4x12 device requires resulting jpeg subsampling
* not to be lower than the input raw image subsampling.
*/
if (ctx->out_q.fmt->subsampling > ctrl->val)
ctrl->val = ctx->out_q.fmt->subsampling;
}
if (ctrl->id == V4L2_CID_JPEG_CHROMA_SUBSAMPLING)
ret = s5p_jpeg_adjust_subs_ctrl(ctx, &ctrl->val);
error_free:
spin_unlock_irqrestore(&ctx->jpeg->slock, flags);
return ret;
}