diff mbox series

media: cedrus: h264: Fix 4K decoding on H6

Message ID 20200315095446.454882-1-jernej.skrabec@siol.net
State New
Headers show
Series media: cedrus: h264: Fix 4K decoding on H6 | expand

Commit Message

Jernej Škrabec March 15, 2020, 9:54 a.m. UTC
Due to unknown reason, H6 needs larger intraprediction buffer for 4K
videos than other SoCs. This was discovered by playing 4096x2304 video,
which is maximum what H6 VPU is supposed to support.

Fixes: 03e612e701a6 ("media: cedrus: Fix H264 4k support")
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/staging/media/sunxi/cedrus/cedrus_h264.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h264.c b/drivers/staging/media/sunxi/cedrus/cedrus_h264.c
index bfb4a4820a67..54ee2aa423e2 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_h264.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_h264.c
@@ -610,8 +610,12 @@  static int cedrus_h264_start(struct cedrus_ctx *ctx)
 			goto err_mv_col_buf;
 		}
 
+		/*
+		 * NOTE: Multiplying by two deviates from CedarX logic, but it
+		 * is for some unknown reason needed for H264 4K decoding on H6.
+		 */
 		ctx->codec.h264.intra_pred_buf_size =
-			ALIGN(ctx->src_fmt.width, 64) * 5;
+			ALIGN(ctx->src_fmt.width, 64) * 5 * 2;
 		ctx->codec.h264.intra_pred_buf =
 			dma_alloc_coherent(dev->dev,
 					   ctx->codec.h264.intra_pred_buf_size,