[PATCH] drm: document DRM_IOCTL_MODE_GETFB2

[Simon Ser]

On Monday, November 15th, 2021 at 15:20, Daniel Vetter <daniel at ffwll.ch> wrote:

> On Mon, Nov 15, 2021 at 12:09:47PM +0000, Simon Ser wrote:
> > On Thursday, November 11th, 2021 at 12:50, Daniel Stone <daniel at fooishbar.org> wrote:
> >
> > > In fairness it is perfectly clear, it's just that I never considered
> > > calling it without master/admin because why would you ever do that?
> >
> > FWIW, drm_info does it to display the current buffers metadata. Pretty
> > useful when debugging.
>
> We also have the state debugfs file for this, which should dump everything
> we can decode. If it doesn't we should extend it there ideally, instead of
> hand-rolling some tool that users/devs then don't have handy. debugfs
> tends to be there (at least for developers).

The debugfs output isn't as nice as drm_info, and can't produce structured
output like JSON.