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[media] media: venus: vdec: add support for min buffers for capture 

This adds support for V4L2_CID_MIN_BUFFERS_FOR_CAPTURE get control
in venus decoder, it is usable in case when the userspace wants
to know minimum capture buffers before calling request_buf for
capture queue in mem2mem drivers. Also this will fix an issue
found gstreamer v4l2videodec element, i.e. the video decoder
element cannot continue because the buffers are insufficient.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Stanimir Varbanov 2017-06-15 13:31:58 -03:00 committed by Mauro Carvalho Chehab
parent c3eb9e51c8
commit ebebc5939e
2 changed files with 16 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/media/platform/qcom/venus/vdec.c
View File

@ -627,6 +627,12 @@ static int vdec_queue_setup(struct vb2_queue *q,
inst->out_height);
inst->input_buf_size = sizes[0];
inst->num_input_bufs = *num_buffers;
ret = vdec_cap_num_buffers(inst, &num);
if (ret)
break;
inst->num_output_bufs = num;
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
*num_planes = inst->fmt_cap->num_planes;
@ -951,6 +957,7 @@ static int vdec_open(struct file *file)
inst->core = core;
inst->session_type = VIDC_SESSION_TYPE_DEC;
inst->num_output_bufs = 1;
venus_helper_init_instance(inst);

10
drivers/media/platform/qcom/venus/vdec_ctrls.c
View File

@ -70,6 +70,9 @@ static int vdec_op_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
ctrl->val = ctr->post_loop_deb_mode;
break;
case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
ctrl->val = inst->num_output_bufs;
break;
default:
return -EINVAL;
};
@ -87,7 +90,7 @@ int vdec_ctrl_init(struct venus_inst *inst)
struct v4l2_ctrl *ctrl;
int ret;
ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 6);
ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 7);
if (ret)
return ret;
@ -135,6 +138,11 @@ int vdec_ctrl_init(struct venus_inst *inst)
v4l2_ctrl_new_std(&inst->ctrl_handler, &vdec_ctrl_ops,
V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER, 0, 1, 1, 0);
ctrl = v4l2_ctrl_new_std(&inst->ctrl_handler, &vdec_ctrl_ops,
V4L2_CID_MIN_BUFFERS_FOR_CAPTURE, 1, 32, 1, 1);
if (ctrl)
ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
ret = inst->ctrl_handler.error;
if (ret) {
v4l2_ctrl_handler_free(&inst->ctrl_handler);