[PATCH v5 2/2] media: V3s: Add support for Allwinner CSI.

[maxime.ripard@free-electrons.com (Maxime Ripard)]

Hi Yong,

On Thu, Jan 11, 2018 at 11:06:06AM +0800, Yong Deng wrote:
> Allwinner V3s SoC features two CSI module. CSI0 is used for MIPI CSI-2
> interface and CSI1 is used for parallel interface. This is not
> documented in datasheet but by test and guess.
> 
> This patch implement a v4l2 framework driver for it.
> 
> Currently, the driver only support the parallel interface. MIPI-CSI2,
> ISP's support are not included in this patch.
> 
> Signed-off-by: Yong Deng <yong.deng@magewell.com>

I've needed this patch in order to fix a NULL pointer dereference:
http://code.bulix.org/oz6gmb-257359?raw

This is needed because while it's ok to have a NULL pointer to
v4l2_subdev_pad_config when you call the subdev set_fmt with
V4L2_SUBDEV_FORMAT_ACTIVE, it's not with V4L2_SUBDEV_FORMAT_TRY, and
sensors will assume taht it's a valid pointer.

Otherwise,
Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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