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[media] s5p-mfc: support MIN_BUFFERS query for encoder 

Add V4L2_CID_MIN_BUFFERS_FOR_OUTPUT query for encoder.
Once mfc encoder state is HEAD_PARSED, which is sequence
header produced, dpb_count is avaialable. Let user space
query this value.

Signed-off-by: Kiran AVND <avnd.kiran@samsung.com>
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Kiran AVND 2014-10-21 08:06:55 -03:00 committed by Mauro Carvalho Chehab
parent edc16cb115
commit c4b1ce051e
1 changed files with 42 additions and 0 deletions
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42
drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
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@ -690,6 +690,16 @@ static struct mfc_control controls[] = {
.step = 1,
.default_value = 0,
},
{
.id = V4L2_CID_MIN_BUFFERS_FOR_OUTPUT,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Minimum number of output bufs",
.minimum = 1,
.maximum = 32,
.step = 1,
.default_value = 1,
.is_volatile = 1,
},
};
#define NUM_CTRLS ARRAY_SIZE(controls)
@ -1624,8 +1634,40 @@ static int s5p_mfc_enc_s_ctrl(struct v4l2_ctrl *ctrl)
return ret;
}
static int s5p_mfc_enc_g_v_ctrl(struct v4l2_ctrl *ctrl)
{
struct s5p_mfc_ctx *ctx = ctrl_to_ctx(ctrl);
struct s5p_mfc_dev *dev = ctx->dev;
switch (ctrl->id) {
case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
if (ctx->state >= MFCINST_HEAD_PARSED &&
ctx->state < MFCINST_ABORT) {
ctrl->val = ctx->pb_count;
break;
} else if (ctx->state != MFCINST_INIT) {
v4l2_err(&dev->v4l2_dev, "Encoding not initialised\n");
return -EINVAL;
}
/* Should wait for the header to be produced */
s5p_mfc_clean_ctx_int_flags(ctx);
s5p_mfc_wait_for_done_ctx(ctx,
S5P_MFC_R2H_CMD_SEQ_DONE_RET, 0);
if (ctx->state >= MFCINST_HEAD_PARSED &&
ctx->state < MFCINST_ABORT) {
ctrl->val = ctx->pb_count;
} else {
v4l2_err(&dev->v4l2_dev, "Encoding not initialised\n");
return -EINVAL;
}
break;
}
return 0;
}
static const struct v4l2_ctrl_ops s5p_mfc_enc_ctrl_ops = {
.s_ctrl = s5p_mfc_enc_s_ctrl,
.g_volatile_ctrl = s5p_mfc_enc_g_v_ctrl,
};
static int vidioc_s_parm(struct file *file, void *priv,