[git pull] drm for 5.8-rc1

[Thierry Reding]

On Thu, Aug 13, 2020 at 10:45:34AM -0700, James Jones wrote:
> I'll defer to Thierry, but I think that may be by design.  Tegra format
> modifiers were added to get things like this working in the first place,
> right?  It's not a regression, is it?

I recall that things used to work with or without modifiers at some
point. That was basically the point of the "pitch-linear by default"
patch, see:

    https://gitlab.freedesktop.org/mesa/mesa/-/commit/9603d81df05105857b676f20dff964ef3ab0ecff

If we don't force pitch-linear for cases where we don't have modifiers,
there's no way we can properly display these as framebuffers because we
lack the modifier information at the kernel level.

Thierry
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