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

Steve Longerbeam
2017-02-22T23:52:50Z

Hi Philipp,

On 02/16/2017 03:32 AM, Philipp Zabel wrote:
> 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.

The IDMAC source pad is going to memory, so it has left the IPU.
Are you sure it should be an internal IPU format? I realize it
is linked to a capture device node, and the IPU format could then
be translated to a v4l2 fourcc by the capture device, but IMHO this
pad is external to the IPU.

Steve