BMC/Intel-BMC/linux.git/include/media/videobuf2-core.h, branch dev

[media] vb2: Only requeue buffers immediately once streaming is started

2015-07-17T12:00:12+00:00

Buffers can be returned back to videobuf2 in driver's streamon handler. In this case vb2_buffer_done() with buffer state VB2_BUF_STATE_QUEUED will cause the driver's buf_queue vb2 operation to be called, queueing the same buffer again only to be returned to videobuf2 using vb2_buffer_done() and so on. Add a new buffer state VB2_BUF_STATE_REQUEUEING which, when used as the state argument to vb2_buffer_done(), will result in buffers queued to the driver. Using VB2_BUF_STATE_QUEUED will leave the buffer to videobuf2, as it was before "[media] vb2: allow requeuing buffers while streaming". Fixes: ce0eff016f72 ("[media] vb2: allow requeuing buffers while streaming") [mchehab@osg.samsung.com: fix warning: enumeration value 'VB2_BUF_STATE_REQUEUEING' not handled in switch] Signed-off-by: Sakari Ailus Acked-by: Hans Verkuil Cc: stable@vger.kernel.org # for v4.1 Signed-off-by: Mauro Carvalho Chehab

[media] videobuf2: return -EPIPE from DQBUF after the last buffer

2015-05-12T06:53:06+00:00

If the last buffer was dequeued from a capture queue, let poll return immediately and let DQBUF return -EPIPE to signal there will no more buffers to dequeue until STREAMOFF. The driver signals the last buffer by setting the V4L2_BUF_FLAG_LAST. To reenable dequeuing on the capture queue, the driver must explicitly call vb2_clear_last_buffer_queued. The last buffer queued flag is cleared automatically during STREAMOFF. Signed-off-by: Philipp Zabel Acked-by: Hans Verkuil Signed-off-by: Kamil Debski Signed-off-by: Mauro Carvalho Chehab

[media] vb2: add allow_zero_bytesused flag to the vb2_queue struct

2015-04-10T12:46:07+00:00

The vb2: fix bytesused == 0 handling (8a75ffb) patch changed the behavior of __fill_vb2_buffer function, so that if bytesused is 0 it is set to the size of the buffer. However, bytesused set to 0 is used by older codec drivers as as indication used to mark the end of stream. To keep backward compatibility, this patch adds a flag passed to the vb2_queue_init function - allow_zero_bytesused. If the flag is set upon initialization of the queue, the videobuf2 keeps the value of bytesused intact in the OUTPUT queue and passes it to the driver. Reported-by: Nicolas Dufresne Signed-off-by: Kamil Debski Acked-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

[media] vb2: split the io_flags member of vb2_queue into a bit field

2015-04-10T12:44:38+00:00

This patch splits the io_flags member of vb2_queue into a bit field. Instead of an enum with flags separate bit fields were introduced. Signed-off-by: Kamil Debski Acked-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

[media] vb2: add dma_dir to the alloc memop

2014-11-25T10:51:44+00:00

This is needed for the next patch where the dma-sg alloc memop needs to know the dma_dir. Signed-off-by: Hans Verkuil Acked-by: Pawel Osciak Signed-off-by: Mauro Carvalho Chehab

[media] vb2: replace 'write' by 'dma_dir'

2014-11-25T10:50:28+00:00

The 'write' argument is very ambiguous. I first assumed that if it is 1, then we're doing video output but instead it meant the reverse. Since it is used to setup the dma_dir value anyway it is now replaced by the correct dma_dir value which is unambiguous. Signed-off-by: Hans Verkuil Acked-by: Pawel Osciak Signed-off-by: Mauro Carvalho Chehab

[media] videobuf2-core.h: improve documentation

2014-11-25T10:47:24+00:00

Document that drivers can access/modify the buffer contents in buf_prepare and buf_finish. That was not clearly stated before. Signed-off-by: Hans Verkuil Acked-by: Pawel Osciak Signed-off-by: Mauro Carvalho Chehab

Merge branch 'patchwork' into v4l_for_linus

2014-10-09T17:00:54+00:00

* patchwork: (544 commits) [media] ir-hix5hd2: fix build on c6x arch [media] pt3: fix DTV FE I2C driver load error paths Revert "[media] media: em28xx - remove reset_resume interface" [media] exynos4-is: fix some warnings when compiling on arm64 [media] usb drivers: use %zu instead of %zd [media] pci drivers: use %zu instead of %zd [media] dvb-frontends: use %zu instead of %zd [media] s5p-mfc: Fix several printk warnings [media] s5p_mfc_opr: Fix warnings [media] ti-vpe: Fix typecast [media] s3c-camif: fix dma_addr_t printks [media] s5p_mfc_opr_v6: get rid of warnings when compiled with 64 bits [media] s5p_mfc_opr_v5: Fix lots of warnings on x86_64 [media] em28xx: Fix identation [media] drxd: remove a dead code [media] saa7146: remove return after BUG() [media] cx88: remove return after BUG() [media] cx88: fix cards table CodingStyle [media] radio-sf16fmr2: declare some structs as static [media] radio-sf16fmi: declare pnp_attached as static ... Conflicts: Documentation/DocBook/media/v4l/compat.xml

[media] v4l: videobuf2: Fix typos in comments

2014-09-23T19:13:40+00:00

The buffer flags are incorrectly referred to as V4L2_BUF_FLAGS_* instead of V4L2_BUF_FLAG_* in comments. Fix it. Signed-off-by: Laurent Pinchart Acked-by: Marek Szyprowski Acked-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab

[media] vb2: fix VBI/poll regression

2014-09-21T23:57:30+00:00

The recent conversion of saa7134 to vb2 unconvered a poll() bug that broke the teletext applications alevt and mtt. These applications expect that calling poll() without having called VIDIOC_STREAMON will cause poll() to return POLLERR. That did not happen in vb2. This patch fixes that behavior. It also fixes what should happen when poll() is called when STREAMON is called but no buffers have been queued. In that case poll() will also return POLLERR, but only for capture queues since output queues will always return POLLOUT anyway in that situation. This brings the vb2 behavior in line with the old videobuf behavior. Signed-off-by: Hans Verkuil Acked-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab