[v7] usb: gadget: uvc: configfs: Add bFrameIndex attributes

[Felipe Balbi <felipe.balbi@linux.intel.com>]

Hi,

Laurent Pinchart <laurent.pinchart@ideasonboard.com> writes:

> Hi Felipe,
>
> On Thursday, 26 July 2018 13:49:07 EEST Felipe Balbi wrote:
>> Laurent Pinchart <laurent.pinchart@ideasonboard.com> writes:
>> > From: Joel Pepper <joel.pepper@rwth-aachen.de>
>> > 
>> > - Add bFrameIndex as a UVCG_FRAME_ATTR_RO for each frame size.
>> > - Automatically assign ascending bFrameIndex to each frame in a format.
>> > 
>> > Before all "bFrameindex" attributes were set to "1" with no way to
>> > configure the gadget otherwise. This resulted in the host always
>> > negotiating for bFrameIndex 1 (i.e. the first framesize of the gadget).
>> > After the negotiation the host driver will set the user or application
>> > selected framesize, while the gadget is actually set to the first
>> > framesize.
>> > 
>> > Now, when the containing format is linked into the streaming header,
>> > iterate over all child frame descriptors and assign ascending indices.
>> > The automatically assigned indices can be read from the new read only
>> > bFrameIndex configsfs attribute in each frame descriptor item.
>> > 
>> > Signed-off-by: Joel Pepper <joel.pepper@rwth-aachen.de>
>> > [Simplified documentation, renamed function, blank space update]
>> > Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>> 
>> please rebase on testing/next, but give me a couple hours to go through
>> the rest of my inbox first ;)
>
> I will. Have you had time to go through the rest of your inbox now ? It's been 
> a few hours already I suppose :-)

well, pull request was already pushed to Greg. We're already in -rc7,
too late for this merge window.