video: driver: tune dcvs and batching buffer count

[1] add dcvs cushion buffers, only if core supports dcvs
[2] update buffer_count for dcvs & batching for priority
    static control.
[3] add max_fps & max_mbpf checks to disable decode_batching.
[4] add low_latency check in msm_vidc_allow_dcvs api.

Change-Id: Iafb7ad4aa601a0a3753e30475a8709f261719b0c
Signed-off-by: Govindaraj Rajagopal <grajagop@codeaurora.org>

driver/vidc/src/msm_vdec.c

@@ -2516,6 +2516,8 @@ int msm_vdec_inst_init(struct msm_vidc_inst *inst)
 		inst->decode_batch.enable = true;
 		inst->decode_batch.size = MAX_DEC_BATCH_SIZE;
 	}
+	if (core->capabilities[DCVS].value)
+		inst->power.dcvs_mode = true;
 
 	f = &inst->fmts[INPUT_PORT];
 	f->type = INPUT_MPLANE;

driver/vidc/src/msm_venc.c

@@ -1731,6 +1731,10 @@ int msm_venc_inst_init(struct msm_vidc_inst *inst)
 	i_vpr_h(inst, "%s()\n", __func__);
 
 	core = inst->core;
+
+	if (core->capabilities[DCVS].value)
+		inst->power.dcvs_mode = true;
+
 	f = &inst->fmts[OUTPUT_PORT];
 	f->type = OUTPUT_MPLANE;
 	f->fmt.pix_mp.width = DEFAULT_WIDTH;

driver/vidc/src/msm_vidc_buffer.c

@@ -117,7 +117,8 @@ u32 msm_vidc_input_extra_count(struct msm_vidc_inst *inst)
 			}
 		}
 	} else if (is_encode_session(inst)) {
-		/* add dcvs buffers */
+		/* add dcvs buffers, if platform supports dcvs */
+		if (core->capabilities[DCVS].value)
 			count = DCVS_ENC_EXTRA_INPUT_BUFFERS;
 	}
 
@@ -143,7 +144,8 @@ u32 msm_vidc_output_extra_count(struct msm_vidc_inst *inst)
 		return 0;
 
 	if (is_decode_session(inst)) {
-		/* add dcvs buffers */
+		/* add dcvs buffers, if platform supports dcvs */
+		if (core->capabilities[DCVS].value)
 			count = DCVS_DEC_EXTRA_OUTPUT_BUFFERS;
 		/*
 		 * if decode batching enabled, ensure minimum batch size

driver/vidc/src/msm_vidc_control.c

@@ -644,7 +644,7 @@ static int msm_vidc_update_buffer_count_if_needed(struct msm_vidc_inst* inst,
 	int rc = 0;
 	bool update_input_port = false, update_output_port = false;
 
-	if (!inst || !inst->capabilities || !ctrl) {
+	if (!inst || !ctrl) {
 		d_vpr_e("%s: invalid parameters\n", __func__);
 		return -EINVAL;
 	}
@@ -658,6 +658,7 @@ static int msm_vidc_update_buffer_count_if_needed(struct msm_vidc_inst* inst,
 		update_input_port = true;
 		break;
 	case V4L2_CID_MPEG_VIDC_THUMBNAIL_MODE:
+	case V4L2_CID_MPEG_VIDC_PRIORITY:
 		update_input_port = true;
 		update_output_port = true;
 		break;
@@ -752,6 +753,17 @@ int msm_v4l2_op_s_ctrl(struct v4l2_ctrl *ctrl)
 			rc = msm_vidc_adjust_session_priority(inst, ctrl);
 			if (rc)
 				return rc;
+
+			/**
+			 * This is the last static s_ctrl from client(commit point). So update
+			 * input & output counts to reflect final buffer counts based on dcvs
+			 * & decoder_batching enable/disable. So client is expected to query
+			 * for final counts after setting priority control.
+			 */
+			if (is_decode_session(inst))
+				inst->decode_batch.enable = msm_vidc_allow_decode_batch(inst);
+
+			msm_vidc_allow_dcvs(inst);
 		}
 		if (is_meta_ctrl(ctrl->id)) {
 			if (cap_id == META_DPB_TAG_LIST) {

driver/vidc/src/msm_vidc_driver.c

@@ -2712,6 +2712,12 @@ void msm_vidc_allow_dcvs(struct msm_vidc_inst *inst)
 		goto exit;
 	}
 
+	allow = !is_lowlatency_session(inst);
+	if (!allow) {
+		i_vpr_h(inst, "%s: lowlatency session\n", __func__);
+		goto exit;
+	}
+
 exit:
 	i_vpr_h(inst, "%s: dcvs: %s\n", __func__, allow ? "enabled" : "disabled");
 
@@ -2721,14 +2727,17 @@ exit:
 
 bool msm_vidc_allow_decode_batch(struct msm_vidc_inst *inst)
 {
+	struct msm_vidc_inst_capability *capability;
 	struct msm_vidc_core *core;
 	bool allow = false;
+	u32 value = 0;
 
-	if (!inst || !inst->core) {
+	if (!inst || !inst->core || !inst->capabilities) {
 		d_vpr_e("%s: invalid params\n", __func__);
 		return false;
 	}
 	core = inst->core;
+	capability = inst->capabilities;
 
 	allow = inst->decode_batch.enable;
 	if (!allow) {
@@ -2778,6 +2787,22 @@ bool msm_vidc_allow_decode_batch(struct msm_vidc_inst *inst)
 		goto exit;
 	}
 
+	value = msm_vidc_get_fps(inst);
+	allow = value < capability->cap[BATCH_FPS].value;
+	if (!allow) {
+		i_vpr_h(inst, "%s: unsupported fps %u, max %u\n", __func__,
+			value, capability->cap[BATCH_FPS].value);
+		goto exit;
+	}
+
+	value = msm_vidc_get_mbs_per_frame(inst);
+	allow = value < capability->cap[BATCH_MBPF].value;
+	if (!allow) {
+		i_vpr_h(inst, "%s: unsupported mbpf %u, max %u\n", __func__,
+			value, capability->cap[BATCH_MBPF].value);
+		goto exit;
+	}
+
 exit:
 	i_vpr_h(inst, "%s: batching: %s\n", __func__, allow ? "enabled" : "disabled");
 
@@ -4090,7 +4115,7 @@ int msm_vidc_core_init(struct msm_vidc_core *core)
 {
 	int rc = 0;
 
-	if (!core || !core->platform) {
+	if (!core || !core->capabilities) {
 		d_vpr_e("%s: invalid params\n", __func__);
 		return -EINVAL;
 	}