[libcamera-devel] New warnings for pixel formats on Raspberry Pi platforms

[Jacopo Mondi]

Hi Naush

On Fri, Aug 05, 2022 at 03:26:16PM +0100, Naushir Patuck via libcamera-devel wrote:
> Hi,
>
> A recent change (commit f25ad4a2b16b libcamera: formats: Reimplement V4L2
> PixelFormatInfo::info()) has started throwing WARN messages on the
> Raspberry Pi platform:
>
> [24:06:09.085738817] [8392]  INFO Camera camera_manager.cpp:293 libcamera
> v0.0.0
> [24:06:09.196596920] [8408]  WARN V4L2 v4l2_pixelformat.cpp:301 Unsupported
> V4L2 pixel format SENS
> [24:06:09.196729049] [8408]  WARN Formats formats.cpp:838 Unsupported pixel
> format 0x00000000
> [24:06:09.198112797] [8408]  WARN V4L2 v4l2_pixelformat.cpp:301 Unsupported
> V4L2 pixel format BSTA
> [24:06:09.198203814] [8408]  WARN Formats formats.cpp:838 Unsupported pixel
> format 0x00000000
> [24:06:09.199839579] [8408]  INFO RPI raspberrypi.cpp:1374 Registered
> camera /base/soc/i2c0mux/i2c at 1/imx477 at 1a to Unicam device /dev/media0 and
> ISP device /dev/media3

Could you kindly point me to the caller site in your pipeline handler
?

>
> This is because our meta formats for statistics and embedded data do not
> have defined types in libcamera::formats::PixelFormat.  The reason for this
> is that they are metadata formats used exclusively internally in the
> pipeline handler, and can never be selected by the application.
>

I would be interested to see the caller as in my head, if those
formats are not application visibile, there's no reason to convert
them to libcamera::formats (ie, they could be managed as V4L2
formats).


> I'm not sure how to fix this.  Do I need to add entries in formats.yaml to
> generate types in libcamera::formats::PixelFormat, meaning I also have to
> add  new 4CCs in the drm headers... :-( Given these are metadata formats,
> and not user selectable, is this the right thing to do?
>
> Naush