media: venus: venc: Add support for Long Term Reference (LTR) controls

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
Signed-off-by: Dikshita Agarwal <dikshita@codeaurora.org>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/qcom/venus/core.h

@@ -241,6 +241,7 @@ struct venc_controls {
 	} level;
 
 	u32 base_priority_id;
+	u32 ltr_count;
 };
 
 struct venus_buffer {

drivers/media/platform/qcom/venus/venc.c

@@ -546,6 +546,7 @@ static int venc_set_properties(struct venus_inst *inst)
 	struct hfi_quantization quant;
 	struct hfi_quantization_range quant_range;
 	struct hfi_enable en;
+	struct hfi_ltr_mode ltr_mode;
 	u32 ptype, rate_control, bitrate;
 	u32 profile, level;
 	int ret;
@@ -722,6 +723,14 @@ static int venc_set_properties(struct venus_inst *inst)
 	if (ret)
 		return ret;
 
+	ptype = HFI_PROPERTY_PARAM_VENC_LTRMODE;
+	ltr_mode.ltr_count = ctr->ltr_count;
+	ltr_mode.ltr_mode = HFI_LTR_MODE_MANUAL;
+	ltr_mode.trust_mode = 1;
+	ret = hfi_session_set_property(inst, ptype, &ltr_mode);
+	if (ret)
+		return ret;
+
 	switch (inst->hfi_codec) {
 	case HFI_VIDEO_CODEC_H264:
 		profile = ctr->profile.h264;

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 +73,8 @@ 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;
 	u32 bframes;
 	u32 ptype;
 	int ret;
@@ -279,6 +282,37 @@ static int venc_op_s_ctrl(struct v4l2_ctrl *ctrl)
 	case V4L2_CID_MPEG_VIDEO_AU_DELIMITER:
 		ctr->aud_enable = ctrl->val;
 		break;
+	case V4L2_CID_MPEG_VIDEO_LTR_COUNT:
+		ctr->ltr_count = ctrl->val;
+		break;
+	case V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX:
+		mutex_lock(&inst->lock);
+		if (inst->streamon_out && inst->streamon_cap) {
+			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;
+			}
+		}
+		mutex_unlock(&inst->lock);
+		break;
+	case V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES:
+		mutex_lock(&inst->lock);
+		if (inst->streamon_out && inst->streamon_cap) {
+			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;
+			}
+		}
+		mutex_unlock(&inst->lock);
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -294,7 +328,7 @@ int venc_ctrl_init(struct venus_inst *inst)
 {
 	int ret;
 
-	ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 52);
+	ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 55);
 	if (ret)
 		return ret;
 
@@ -504,6 +538,18 @@ int venc_ctrl_init(struct venus_inst *inst)
 	v4l2_ctrl_new_std(&inst->ctrl_handler, &venc_ctrl_ops,
 			  V4L2_CID_MPEG_VIDEO_AU_DELIMITER, 0, 1, 1, 0);
 
+	v4l2_ctrl_new_std(&inst->ctrl_handler, &venc_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES, 0,
+			  ((1 << MAX_LTR_FRAME_COUNT) - 1), 0, 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;