diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0284-staging-bcm2835-codec-implement-V4L2_CID_MIN_BUFFERS.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0284-staging-bcm2835-codec-implement-V4L2_CID_MIN_BUFFERS.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0284-staging-bcm2835-codec-implement-V4L2_CID_MIN_BUFFERS.patch b/target/linux/bcm27xx/patches-5.4/950-0284-staging-bcm2835-codec-implement-V4L2_CID_MIN_BUFFERS.patch new file mode 100644 index 0000000000..6e4af3e38d --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0284-staging-bcm2835-codec-implement-V4L2_CID_MIN_BUFFERS.patch @@ -0,0 +1,46 @@ +From 8ffc08d336326d576b84d59135402f08cf2cf41c Mon Sep 17 00:00:00 2001 +From: Chen-Yu Tsai <wens@csie.org> +Date: Mon, 22 Jul 2019 22:13:30 +0800 +Subject: [PATCH] staging: bcm2835-codec: implement + V4L2_CID_MIN_BUFFERS_FOR_CAPTURE + +The stateful decoder specification shows an optional step for retrieving +the miminum number of capture buffers required for the decoder to +proceed. While not a required parameter, having it makes some +applications happy. + +bcm2835-codec is a little different from other decoder implementations +in that there is an intermediate format conversion between the hardware +and V4L2 buffers. The number of capture buffers required is therefore +independent of the stream and DPB etc. + +There are plans to remove the conversion, but it requires a fair amount +of rework within the firmware. Until that is done, simply return a value +of 1. + +Signed-off-by: Chen-Yu Tsai <wens@csie.org> +--- + .../vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c | 12 ++++++++++++ + 1 file changed, 12 insertions(+) + +--- a/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c ++++ b/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c +@@ -2357,6 +2357,18 @@ static int bcm2835_codec_open(struct fil + } + ctx->fh.ctrl_handler = hdl; + v4l2_ctrl_handler_setup(hdl); ++ } else if (dev->role == DECODE) { ++ v4l2_ctrl_handler_init(hdl, 1); ++ ++ v4l2_ctrl_new_std(hdl, &bcm2835_codec_ctrl_ops, ++ V4L2_CID_MIN_BUFFERS_FOR_CAPTURE, ++ 1, 1, 1, 1); ++ if (hdl->error) { ++ rc = hdl->error; ++ goto free_ctrl_handler; ++ } ++ ctx->fh.ctrl_handler = hdl; ++ v4l2_ctrl_handler_setup(hdl); + } + + ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init); |