linux-toradex.git/drivers/media/video/mx2_camera.c, branch v3.4.80

[media] media: i.MX27 camera: Add resizing support

2012-03-08T13:06:44+00:00

If the attached video sensor cannot provide the
requested image size, try to use resizing engine
included in the eMMa-PrP IP.

This patch supports both averaging and bilinear
algorithms.

Signed-off-by: Javier Martin 
Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab

[media] media: video: mx2_camera.c: Remove unneeded dev_dbg

2012-03-08T13:05:51+00:00

csi clock frequency is already shown by:

dev_info(&pdev->dev, "MX2 Camera (CSI) driver probed, clock frequency: %ld\n",
		clk_get_rate(pcdev->clk_csi));

,so no need to have the dev_dbg call to present the same information.

Signed-off-by: Fabio Estevam 
Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab

[media] media: video: mx2_camera.c: Provide error message if clk_get fails

2012-03-08T13:04:39+00:00

Provide error message if clk_get fails.

Signed-off-by: Fabio Estevam 
Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab

[media] media: i.MX27 camera: more efficient discard buffer handling

2012-03-08T13:04:10+00:00

Some elements of 'mx2_buffer' are grouped together in another
auxiliary structure. This way we don't need to have unused
'vb2_buffer' structures for both discard buffers.

Signed-off-by: Javier Martin 
Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab

[media] media: i.MX27 camera: fix compilation warning

2012-03-08T12:46:55+00:00

Signed-off-by: Javier Martin 
Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab

[media] media: i.MX27 camera: return IRQ_NONE if no IRQ status bit is set

2012-03-08T12:45:06+00:00

If active_bufs() list is empty and no IRQ status bit is set
we are probably dealing with a share IRQ. Return IRQ_NONE in
this case.

Signed-off-by: Javier Martin 
Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab

[media] media: i.MX27 camera: Use spin_lock() inside the IRQ handler

2012-03-08T12:44:00+00:00

We don't need to use spin_lock_irqsave() since there are not
any other IRQs that can race with this ISR.

Signed-off-by: Javier Martin 
Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab

[media] media: i.MX27 camera: Use list_first_entry() whenever possible

2012-03-08T12:43:03+00:00

Signed-off-by: Javier Martin 
[g.liakhovetski@gmx.de: fix one list_first_entry() instance]
Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab

[media] media i.MX27 camera: handle overflows properly

2012-03-08T12:42:31+00:00

Signed-off-by: Javier Martin 
Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab

[media] media i.MX27 camera: improve discard buffer handling

2012-03-08T12:41:56+00:00

The way discard buffer was previously handled lead
to possible races that made a buffer that was not
yet ready to be overwritten by new video data. This
is easily detected at 25fps just adding "#define DEBUG"
to enable the "memset" check and seeing how the image
is corrupted.

A new "discard" queue and two discard buffers have
been added to make them flow trough the pipeline
of queues and thus provide suitable event ordering.

Signed-off-by: Javier Martin 
Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab