[PATCH 1/9] drm/fourcc: Add macro to check for the modifier vendor

[Thierry Reding]

On Tue, Mar 23, 2021 at 04:04:35PM +0000, Simon Ser wrote:
> Can we instead have a macro/function to get the vendor? This would be
> useful elsewhere as well, see drmGetFormatModifierVendor in a recent-ish
> libdrm patch [1].
> 
> [1]: https://gitlab.freedesktop.org/mesa/drm/-/merge_requests/108/diffs#91ecb12b27c7154b26013bb95e17a5cc24ea443e_947_947

Either way would work. I chose this because it ends up being much
shorter than extracting the vendor and comparing to the constant.

Maybe we should just add both?

Thierry
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