media: s5p-mfc: DPB Count Independent of VIDIOC_REQBUF

Add allocation of DPB buffers based on MFC requirement so,
codec buffers allocations has been moved after state
MFCINST_HEAD_PRODUCED. It is taken care that codec buffer allocation
is performed in process context from userspace IOCTL call.

Cc: linux-fsd@tesla.com
Signed-off-by: Smitha T Murthy <smithatmurthy@gmail.com>
Signed-off-by: Aakarsh Jain <aakarsh.jain@samsung.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/platform/samsung/s5p-mfc/s5p_mfc_enc.c

@@ -1164,7 +1164,6 @@ static int enc_post_seq_start(struct s5p_mfc_ctx *ctx)
 	struct s5p_mfc_dev *dev = ctx->dev;
 	struct s5p_mfc_enc_params *p = &ctx->enc_params;
 	struct s5p_mfc_buf *dst_mb;
-	unsigned int enc_pb_count;
 
 	if (p->seq_hdr_mode == V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE) {
 		if (!list_empty(&ctx->dst_queue)) {
@@ -1186,10 +1185,7 @@ static int enc_post_seq_start(struct s5p_mfc_ctx *ctx)
 			set_work_bit_irqsave(ctx);
 		s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
 	} else {
-		enc_pb_count = s5p_mfc_hw_call(dev->mfc_ops,
-				get_enc_dpb_count, dev);
-		if (ctx->pb_count < enc_pb_count)
-			ctx->pb_count = enc_pb_count;
+		ctx->pb_count = s5p_mfc_hw_call(dev->mfc_ops, get_enc_dpb_count, dev);
 		if (FW_HAS_E_MIN_SCRATCH_BUF(dev)) {
 			ctx->scratch_buf_size = s5p_mfc_hw_call(dev->mfc_ops,
 					get_e_min_scratch_buf_size, dev);
@@ -1564,14 +1560,6 @@ static int vidioc_reqbufs(struct file *file, void *priv,
 		}
 		ctx->capture_state = QUEUE_BUFS_REQUESTED;
 
-		ret = s5p_mfc_hw_call(ctx->dev->mfc_ops,
-				alloc_codec_buffers, ctx);
-		if (ret) {
-			mfc_err("Failed to allocate encoding buffers\n");
-			reqbufs->count = 0;
-			ret = vb2_reqbufs(&ctx->vq_dst, reqbufs);
-			return -ENOMEM;
-		}
 	} else if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 		if (reqbufs->count == 0) {
 			mfc_debug(2, "Freeing buffers\n");
@@ -1587,15 +1575,13 @@ static int vidioc_reqbufs(struct file *file, void *priv,
 			return -EINVAL;
 		}
 
-		if (IS_MFCV6_PLUS(dev)) {
+		if (IS_MFCV6_PLUS(dev) && (!IS_MFCV12(dev))) {
 			/* Check for min encoder buffers */
 			if (ctx->pb_count &&
 				(reqbufs->count < ctx->pb_count)) {
 				reqbufs->count = ctx->pb_count;
 				mfc_debug(2, "Minimum %d output buffers needed\n",
 						ctx->pb_count);
-			} else {
-				ctx->pb_count = reqbufs->count;
 			}
 		}
 

drivers/media/platform/samsung/s5p-mfc/s5p_mfc_opr_v6.c

@@ -2110,6 +2110,13 @@ static inline int s5p_mfc_run_init_enc_buffers(struct s5p_mfc_ctx *ctx)
 	struct s5p_mfc_dev *dev = ctx->dev;
 	int ret;
 
+	ret = s5p_mfc_hw_call(ctx->dev->mfc_ops, alloc_codec_buffers, ctx);
+	if (ret) {
+		mfc_err("Failed to allocate encoding buffers\n");
+		return -ENOMEM;
+	}
+	mfc_debug(2, "Allocated Internal Encoding Buffers\n");
+
 	dev->curr_ctx = ctx->num;
 	ret = s5p_mfc_set_enc_ref_buffer_v6(ctx);
 	if (ret) {