media: saa7146: convert to vb2

Convert this driver from the old videobuf framework to the vb2
frame.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mch

media: saa7146: convert to vb2

Convert this driver from the old videobuf framework to the vb2
frame.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

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media: common: saa7146: drop 'fmt' from struct saa7146_buf

Use the video_fmt in saa7146_vv instead of having a pointer
to it in struct saa7146_buf.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4al

media: common: saa7146: drop 'fmt' from struct saa7146_buf

Use the video_fmt in saa7146_vv instead of having a pointer
to it in struct saa7146_buf.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

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media: saa7146: drop 'dev' and 'resources' from struct saa7146_fh

Instead use vv->resources and video_drvdata(file) to
obtain this information.

This prepares for the vb2 conversion later when saa71

media: saa7146: drop 'dev' and 'resources' from struct saa7146_fh

Instead use vv->resources and video_drvdata(file) to
obtain this information.

This prepares for the vb2 conversion later when saa7146_fh is
dropped completely.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

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media: saa7146: drop overlay support

Destructive overlay support (i.e. where the video frame is DMA-ed
straight into a framebuffer) is effectively dead. It was a
necessary evil in the early days whe

media: saa7146: drop overlay support

Destructive overlay support (i.e. where the video frame is DMA-ed
straight into a framebuffer) is effectively dead. It was a
necessary evil in the early days when computers were not fast enough
to copy SDTV video frames around, but today that's no longer a problem.

It requires access to the framebuffer memory, which is a bad idea and
very hard to do safely. In addition, in drm it is today almost
impossible to get hold of the framebuffer address.

So drop support for this.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

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