There's a confusion between the preferred_depth uapi and the generic fbdev helpers. Former wants depth, latter wants bpp, and for XRGB8888 they don't match. Which hit me with vkms, which wants that. All other drivers setting this and using the generic fbdev helpers use 16, where both numbers match, for RGB565. Since fixing this is a bit involved (I think for atomic drivers we should just compute this all internally from the format list of the first primary plane) paper over the issue in vkms by using defaults everywhere. Then userspace will pick XRGB8888, and fbdev helpers will do the same, and we have what we want. Reported-by: Simon Ser <contact@emersion.fr> Reviewed-by: Simon Ser <contact@emersion.fr> Cc: Simon Ser <contact@emersion.fr> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Cc: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com> Cc: Melissa Wen <melissa.srw@gmail.com> Cc: Haneen Mohammed <hamohammed.sa@gmail.com> Cc: Daniel Vetter <daniel@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20201211161113.3350061-1-daniel.vetter@ffwll.ch
Linux kernel ============ There are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. Please read Documentation/admin-guide/README.rst first. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. The formatted documentation can also be read online at: https://www.kernel.org/doc/html/latest/ There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.
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