Re: [PATCH v4 33/36] media: imx: redo pixel format enumeration and negotiation

From: Philipp Zabel
Date: Thu Feb 16 2017 - 06:32:54 EST

On Wed, 2017-02-15 at 18:19 -0800, Steve Longerbeam wrote:
> The previous API and negotiation of mbus codes and pixel formats
> was broken, and has been completely redone.
> The negotiation of media bus codes should be as follows:
> CSI:
> sink pad direct src pad IDMAC src pad
> -------- ---------------- -------------
> RGB (any) IPU RGB RGB (any)
> YUV (any) IPU YUV YUV (any)
> Bayer N/A must be same bayer code as sink

The IDMAC src pad should also use the internal 32-bit RGB / YUV format,
except if bayer/raw mode is selected, in which case the attached capture
video device should only allow a single mode corresponding to the output
pad media bus format.