linux-imx

LF-356: media: imx8 isi: fix buffer active bit change for QXP C0

For ISI of QXP B0, if CHNL_STS[BUF1_ACTIVE] bit is zero, means buffer1
of ping-pong buffer is active, driver can't change buffer1 address.
If CHNL_STS[BUF1_ACTIVE] bit is set, means buffer1 is free, driver
can modify its address.

For ISI of QXP C0, the buffer active logical reverse. It means driver
can change buffer1 address if CHNL_STS[BUF1_ACTIVE] bit is zero and can't
if CHNL_STS[BUF1_ACTIVE] bit is set.

So driver need to distinguish soc version and select how to switch ping
pong buffer.

Signed-off-by: Guoniu.zhou <guoniu.zhou@nxp.com>
Reviewed-by: Sandor.yu <sandor.yu@nxp.com>