Re: [PATCH v5 2/2] venus: venc: Add support for Long Term Reference (LTR) controls

From: dikshita
Date: Tue Jan 12 2021 - 23:29:43 EST

Hi Hans,

On 2021-01-12 14:34, Hans Verkuil wrote:
On 04/01/2021 06:09, Dikshita Agarwal wrote:
Add support for below LTR controls in encoder:
- V4L2_CID_MPEG_VIDEO_LTR_COUNT
- V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX
- V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES

This patch does not add any Request API support to the venus driver,
so it makes no sense to merge this series. It's incomplete.


It Is not mandatory to use request API for LTR controls.
LTR controls can be exercised either in frame synchronized manner or
in the non-frame synchronized way as well.

Thanks,
Dikshita
The other two series (priority ID and QP and layer bitrate) look good
to be merged.

Regards,

Hans


Signed-off-by: Dikshita Agarwal <dikshita@xxxxxxxxxxxxxx>
---
drivers/media/platform/qcom/venus/venc_ctrls.c | 49 +++++++++++++++++++++++++-
1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/venus/venc_ctrls.c b/drivers/media/platform/qcom/venus/venc_ctrls.c
index 496ad4d..7d010d8 100644
--- a/drivers/media/platform/qcom/venus/venc_ctrls.c
+++ b/drivers/media/platform/qcom/venus/venc_ctrls.c
@@ -20,6 +20,7 @@
#define INTRA_REFRESH_MBS_MAX 300
#define AT_SLICE_BOUNDARY \
V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY
+#define MAX_LTR_FRAME_COUNT 4

static int venc_calc_bpframes(u32 gop_size, u32 conseq_b, u32 *bf, u32 *pf)
{
@@ -72,6 +73,9 @@ static int venc_op_s_ctrl(struct v4l2_ctrl *ctrl)
struct venc_controls *ctr = &inst->controls.enc;
struct hfi_enable en = { .enable = 1 };
struct hfi_bitrate brate;
+ struct hfi_ltr_use ltr_use;
+ struct hfi_ltr_mark ltr_mark;
+ struct hfi_ltr_mode ltr_mode;
u32 bframes;
u32 ptype;
int ret;
@@ -259,6 +263,37 @@ static int venc_op_s_ctrl(struct v4l2_ctrl *ctrl)
case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:
ctr->frame_skip_mode = ctrl->val;
break;
+ case V4L2_CID_MPEG_VIDEO_LTR_COUNT:
+ ptype = HFI_PROPERTY_PARAM_VENC_LTRMODE;
+ ltr_mode.ltr_count = ctrl->val;
+ ltr_mode.ltr_mode = HFI_LTR_MODE_MANUAL;
+ ltr_mode.trust_mode = 1;
+ ret = hfi_session_set_property(inst, ptype, &ltr_mode);
+ if (ret) {
+ mutex_unlock(&inst->lock);
+ return ret;
+ }
+ break;
+ case V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX:
+ ptype = HFI_PROPERTY_CONFIG_VENC_MARKLTRFRAME;
+ ltr_mark.mark_frame = ctrl->val;
+ ret = hfi_session_set_property(inst, ptype, &ltr_mark);
+ if (ret) {
+ mutex_unlock(&inst->lock);
+ return ret;
+ }
+ break;
+ case V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES:
+ ptype = HFI_PROPERTY_CONFIG_VENC_USELTRFRAME;
+ ltr_use.ref_ltr = ctrl->val;
+ ltr_use.use_constrnt = true;
+ ltr_use.frames = 0;
+ ret = hfi_session_set_property(inst, ptype, &ltr_use);
+ if (ret) {
+ mutex_unlock(&inst->lock);
+ return ret;
+ }
+ break;
default:
return -EINVAL;
}
@@ -274,7 +309,7 @@ int venc_ctrl_init(struct venus_inst *inst)
{
int ret;

- ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 50);
+ ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 53);
if (ret)
return ret;

@@ -476,6 +511,18 @@ int venc_ctrl_init(struct venus_inst *inst)
(1 << V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT)),
V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_DISABLED);

+ v4l2_ctrl_new_std(&inst->ctrl_handler, &venc_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES, 0,
+ (MAX_LTR_FRAME_COUNT - 1), 1, 0);
+
+ v4l2_ctrl_new_std(&inst->ctrl_handler, &venc_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_LTR_COUNT, 0,
+ MAX_LTR_FRAME_COUNT, 1, 0);
+
+ v4l2_ctrl_new_std(&inst->ctrl_handler, &venc_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX, 0,
+ (MAX_LTR_FRAME_COUNT - 1), 1, 0);
+
ret = inst->ctrl_handler.error;
if (ret)
goto err;