video: driver: add reqbuf allow checks inside state handler

use state specific checks inside state_handler instead of
relying global msm_vidc_allow_reqbufs function.

Change-Id: Iaf7f23e4e2ef9b714e3d4c2900c2753d74150fd1
Signed-off-by: Govindaraj Rajagopal <quic_grajagop@quicinc.com>

driver/vidc/inc/msm_vidc_driver.h

@@ -492,7 +492,6 @@ bool msm_vidc_allow_metadata_subscription(struct msm_vidc_inst *inst,
 bool msm_vidc_allow_property(struct msm_vidc_inst *inst, u32 hfi_id);
 int msm_vidc_update_property_cap(struct msm_vidc_inst *inst, u32 hfi_id,
 	bool allow);
-bool msm_vidc_allow_reqbufs(struct msm_vidc_inst *inst, u32 type);
 enum msm_vidc_allow msm_vidc_allow_stop(struct msm_vidc_inst *inst);
 bool msm_vidc_allow_start(struct msm_vidc_inst *inst);
 bool msm_vidc_allow_streamon(struct msm_vidc_inst *inst, u32 type);

driver/vidc/src/msm_vidc.c

@@ -397,11 +397,6 @@ int msm_vidc_reqbufs(void *instance, struct v4l2_requestbuffers *b)
 		return -EINVAL;
 	}
 
-	if (!msm_vidc_allow_reqbufs(inst, b->type)) {
-		rc = -EBUSY;
-		goto exit;
-	}
-
 	port = v4l2_type_to_driver_port(inst, b->type, __func__);
 	if (port < 0) {
 		rc = -EINVAL;

driver/vidc/src/msm_vidc_driver.c

@@ -1115,38 +1115,6 @@ int msm_vidc_update_property_cap(struct msm_vidc_inst *inst, u32 hfi_id,
 	return rc;
 }
 
-bool msm_vidc_allow_reqbufs(struct msm_vidc_inst *inst, u32 type)
-{
-	bool allow = false;
-
-	if (!inst) {
-		d_vpr_e("%s: invalid params\n", __func__);
-		return false;
-	}
-	if (is_state(inst, MSM_VIDC_OPEN)) {
-		allow = true;
-		goto exit;
-	}
-	if (type == OUTPUT_MPLANE || type == OUTPUT_META_PLANE) {
-		if (is_state(inst, MSM_VIDC_INPUT_STREAMING)) {
-			allow = true;
-			goto exit;
-		}
-	}
-	if (type == INPUT_MPLANE || type == INPUT_META_PLANE) {
-		if (is_state(inst, MSM_VIDC_OUTPUT_STREAMING)) {
-			allow = true;
-			goto exit;
-		}
-	}
-
-exit:
-	if (!allow)
-		i_vpr_e(inst, "%s: type %d not allowed in state %s\n",
-				__func__, type, state_name(inst->state));
-	return allow;
-}
-
 enum msm_vidc_allow msm_vidc_allow_stop(struct msm_vidc_inst *inst)
 {
 	enum msm_vidc_allow allow = MSM_VIDC_DISALLOW;

driver/vidc/src/msm_vidc_state.c

@@ -668,6 +668,7 @@ static int msm_vidc_open_state(struct msm_vidc_inst *inst,
 	{
 		struct v4l2_requestbuffers *b = (struct v4l2_requestbuffers *)data;
 
+		/* allow reqbufs request in open state */
 		rc = msm_vidc_reqbufs(inst, b);
 		if (rc)
 			return rc;
@@ -813,6 +814,13 @@ static int msm_vidc_input_streaming_state(struct msm_vidc_inst *inst,
 	{
 		struct v4l2_requestbuffers *b = (struct v4l2_requestbuffers *)data;
 
+		/* disallow */
+		if (b->type == INPUT_MPLANE || b->type == INPUT_META_PLANE) {
+			i_vpr_e(inst, "%s: (%s) not allowed for (%s) port\n",
+				__func__, event_name(event), v4l2_type_name(b->type));
+			return -EBUSY;
+		}
+
 		rc = msm_vidc_reqbufs(inst, b);
 		if (rc)
 			return rc;
@@ -970,6 +978,13 @@ static int msm_vidc_output_streaming_state(struct msm_vidc_inst *inst,
 	{
 		struct v4l2_requestbuffers *b = (struct v4l2_requestbuffers *)data;
 
+		/* disallow */
+		if (b->type == OUTPUT_MPLANE || b->type == OUTPUT_META_PLANE) {
+			i_vpr_e(inst, "%s: (%s) not allowed for (%s) port\n",
+				__func__, event_name(event), v4l2_type_name(b->type));
+			return -EBUSY;
+		}
+
 		rc = msm_vidc_reqbufs(inst, b);
 		if (rc)
 			return rc;