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Apple GPUs support non-linear "GPU-tiled" image layouts. Add modifiers for these layouts. Mesa requires these modifiers to share non-linear buffers across processes, but no other userspace or kernel support is required/expected. These layouts are notably not used for interchange across hardware blocks (e.g. with the display controller). There are other layouts for that but we don't support them either in userspace or kernelspace yet (even downstream), so we don't add modifiers here. Acked-by: Faith Ekstrand <faith.ekstrand@collabora.com> Reviewed-by: Sven Peter <sven@svenpeter.dev> Link: https://patchwork.freedesktop.org/patch/msgid/20250310-apple-twiddled-modifiers-v4-1-1ccac9544808@rosenzweig.io Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>