linux-imx

media: i2c: fix hang issue when ov5640 work at DVP mode

When setting ov5640 to XGA, 720P, 1080P and 2592x1944 at DVP mode,
receiver can't get data from sensor. After trying many configuration,
I found 0x3824[1] need to be set to control divide DVP PCLK and do
software power-down when configure sensor to XGA and 720P.

For 1080P and 2592x1944, sensor don't support 30fps. So return NULL
when user try to get 1080P@30 and 2592x1944@30fps.

Signed-off-by: Guoniu.zhou <guoniu.zhou@nxp.com>