[PATCH v2 10/12] media: rkvdec: Lock capture pixel format in s_ctrl and s_fmt
From: Jonas Karlman
Date: Mon Jul 06 2020 - 17:54:54 EST
Add an optional valid_fmt operation that should return the valid
pixelformat of CAPTURE buffers.
This is used in next patch to ensure correct pixelformat is used for 10-bit
and 4:2:2 content.
Signed-off-by: Jonas Karlman <jonas@xxxxxxxxx>
---
Changes in v2:
- Reworked validation of pixelformat
Limitations:
- Only a single valid format is supported, technically both CbCr and CrCb
format variants could be supported by HW.
Example call order using ffmpeg for a 10-bit H.264 608x480 video:
0) Open /dev/video node
rkvdec_reset_decoded_fmt: current valid_fmt= new valid_fmt=
rkvdec_fill_decoded_pixfmt: pixelformat=NV12 width=64 height=48
rkvdec_s_ctrl: current valid_fmt= new valid_fmt=NV12
rkvdec_fill_decoded_pixfmt: pixelformat=NV12 width=64 height=48
1) Set the coded format on the OUTPUT queue via VIDIOC_S_FMT()
rkvdec_enum_output_fmt: index=0 pixelformat=S264
rkvdec_s_output_fmt: pixelformat=S264 width=608 height=480 valid_fmt=NV12
rkvdec_reset_decoded_fmt: current valid_fmt=NV12 new valid_fmt=
rkvdec_fill_decoded_pixfmt: pixelformat=NV12 width=640 height=480
2) Call VIDIOC_S_EXT_CTRLS() to set all the controls
rkvdec_try_ctrl: current valid_fmt=
rkvdec_s_ctrl: current valid_fmt= new valid_fmt=NV15
rkvdec_fill_decoded_pixfmt: pixelformat=NV15 width=640 height=480
3) Call VIDIOC_G_FMT() for CAPTURE queue
rkvdec_g_capture_fmt: pixelformat=NV15 width=640 height=480
4) Enumerate CAPTURE formats via VIDIOC_ENUM_FMT() on the CAPTURE queue
rkvdec_enum_capture_fmt: index=0 pixelformat=NV15 valid_fmt=NV15
5) Choose a different CAPTURE format than suggested via VIDIOC_G_FMT()
rkvdec_s_capture_fmt: pixelformat=NV15 width=608 height=480 valid_fmt=NV15
rkvdec_fill_decoded_pixfmt: pixelformat=NV15 width=640 height=480
rkvdec_g_capture_fmt: pixelformat=NV15 width=640 height=480
---
drivers/staging/media/rkvdec/rkvdec.c | 59 ++++++++++++++++++++++++---
drivers/staging/media/rkvdec/rkvdec.h | 2 +
2 files changed, 55 insertions(+), 6 deletions(-)
diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c
index 911132be6d50..11a88cb6407d 100644
--- a/drivers/staging/media/rkvdec/rkvdec.c
+++ b/drivers/staging/media/rkvdec/rkvdec.c
@@ -38,6 +38,16 @@ static void rkvdec_fill_decoded_pixfmt(struct rkvdec_ctx *ctx,
pix_mp->field = V4L2_FIELD_NONE;
}
+static u32 rkvdec_valid_fmt(struct rkvdec_ctx *ctx, struct v4l2_ctrl *ctrl)
+{
+ const struct rkvdec_coded_fmt_desc *coded_desc = ctx->coded_fmt_desc;
+
+ if (coded_desc->ops->valid_fmt)
+ return coded_desc->ops->valid_fmt(ctx, ctrl);
+
+ return ctx->valid_fmt;
+}
+
static int rkvdec_try_ctrl(struct v4l2_ctrl *ctrl)
{
struct rkvdec_ctx *ctx = container_of(ctrl->handler, struct rkvdec_ctx, ctrl_hdl);
@@ -60,6 +70,10 @@ static int rkvdec_try_ctrl(struct v4l2_ctrl *ctrl)
/* Only 8-bit is supported */
return -EINVAL;
+ if (ctx->valid_fmt && ctx->valid_fmt != rkvdec_valid_fmt(ctx, ctrl))
+ /* Only current valid format */
+ return -EINVAL;
+
width = (sps->pic_width_in_mbs_minus1 + 1) * 16;
height = (sps->pic_height_in_map_units_minus1 + 1) * 16;
@@ -70,8 +84,27 @@ static int rkvdec_try_ctrl(struct v4l2_ctrl *ctrl)
return 0;
}
+static int rkvdec_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct rkvdec_ctx *ctx = container_of(ctrl->handler, struct rkvdec_ctx, ctrl_hdl);
+
+ if (ctrl->id == V4L2_CID_MPEG_VIDEO_H264_SPS && !ctx->valid_fmt) {
+ ctx->valid_fmt = rkvdec_valid_fmt(ctx, ctrl);
+ if (ctx->valid_fmt) {
+ struct v4l2_pix_format_mplane *pix_mp;
+
+ pix_mp = &ctx->decoded_fmt.fmt.pix_mp;
+ pix_mp->pixelformat = ctx->valid_fmt;
+ rkvdec_fill_decoded_pixfmt(ctx, pix_mp);
+ }
+ }
+
+ return 0;
+}
+
static const struct v4l2_ctrl_ops rkvdec_ctrl_ops = {
.try_ctrl = rkvdec_try_ctrl,
+ .s_ctrl = rkvdec_s_ctrl,
};
static const struct rkvdec_ctrl_desc rkvdec_h264_ctrl_descs[] = {
@@ -188,6 +221,7 @@ static void rkvdec_reset_decoded_fmt(struct rkvdec_ctx *ctx)
{
struct v4l2_format *f = &ctx->decoded_fmt;
+ ctx->valid_fmt = 0;
rkvdec_reset_fmt(ctx, f, ctx->coded_fmt_desc->decoded_fmts[0]);
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
f->fmt.pix_mp.width = ctx->coded_fmt.fmt.pix_mp.width;
@@ -243,13 +277,17 @@ static int rkvdec_try_capture_fmt(struct file *file, void *priv,
if (WARN_ON(!coded_desc))
return -EINVAL;
- for (i = 0; i < coded_desc->num_decoded_fmts; i++) {
- if (coded_desc->decoded_fmts[i] == pix_mp->pixelformat)
- break;
- }
+ if (ctx->valid_fmt) {
+ pix_mp->pixelformat = ctx->valid_fmt;
+ } else {
+ for (i = 0; i < coded_desc->num_decoded_fmts; i++) {
+ if (coded_desc->decoded_fmts[i] == pix_mp->pixelformat)
+ break;
+ }
- if (i == coded_desc->num_decoded_fmts)
- pix_mp->pixelformat = coded_desc->decoded_fmts[0];
+ if (i == coded_desc->num_decoded_fmts)
+ pix_mp->pixelformat = coded_desc->decoded_fmts[0];
+ }
/* Always apply the frmsize constraint of the coded end. */
pix_mp->width = max(pix_mp->width, ctx->coded_fmt.fmt.pix_mp.width);
@@ -324,6 +362,7 @@ static int rkvdec_s_capture_fmt(struct file *file, void *priv,
return ret;
ctx->decoded_fmt = *f;
+ ctx->valid_fmt = f->fmt.pix_mp.pixelformat;
return 0;
}
@@ -413,6 +452,14 @@ static int rkvdec_enum_capture_fmt(struct file *file, void *priv,
if (WARN_ON(!ctx->coded_fmt_desc))
return -EINVAL;
+ if (ctx->valid_fmt) {
+ if (f->index)
+ return -EINVAL;
+
+ f->pixelformat = ctx->valid_fmt;
+ return 0;
+ }
+
if (f->index >= ctx->coded_fmt_desc->num_decoded_fmts)
return -EINVAL;
diff --git a/drivers/staging/media/rkvdec/rkvdec.h b/drivers/staging/media/rkvdec/rkvdec.h
index 2fc9f46b6910..50e67401fdbe 100644
--- a/drivers/staging/media/rkvdec/rkvdec.h
+++ b/drivers/staging/media/rkvdec/rkvdec.h
@@ -64,6 +64,7 @@ vb2_to_rkvdec_decoded_buf(struct vb2_buffer *buf)
struct rkvdec_coded_fmt_ops {
int (*adjust_fmt)(struct rkvdec_ctx *ctx,
struct v4l2_format *f);
+ u32 (*valid_fmt)(struct rkvdec_ctx *ctx, struct v4l2_ctrl *ctrl);
int (*start)(struct rkvdec_ctx *ctx);
void (*stop)(struct rkvdec_ctx *ctx);
int (*run)(struct rkvdec_ctx *ctx);
@@ -97,6 +98,7 @@ struct rkvdec_ctx {
struct v4l2_fh fh;
struct v4l2_format coded_fmt;
struct v4l2_format decoded_fmt;
+ u32 valid_fmt;
const struct rkvdec_coded_fmt_desc *coded_fmt_desc;
struct v4l2_ctrl_handler ctrl_hdl;
struct rkvdec_dev *dev;
--
2.17.1