[PATCH] drm: Fix drm.h uapi header for Windows

[Daniel Vetter]

On Thu, Dec 3, 2020 at 9:18 AM Michel Dänzer <michel at daenzer.net> wrote:
>
> On 2020-12-02 8:47 p.m., James Park wrote:
> >
> > If we're trying to cut ties with the drm-uapi folder entirely, the stuff
> > ac_surface.c need includes the AMD_FMT_MOD stuff in drm_fourcc.h,
> > and AMDGPU_TILING_* under amdgpu_drm.h. Is there a better spot for these
> > definitions?
>
> The Mesa src/amd/ code should use platform-neutral abstractions for
> these. This wasn't deemed necessary before, because nobody was trying to
> build these drivers for non-UNIX OSes. But now you are.

I think that's a bit much busy work for not much gain. drm_fourcc.h is
even included as the official source of truth of some khr extensions,
making that header stand-alone and useable cross-platform sounds like
a good idea to me. Something like the below is imo perfectly fine:

diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index ca48ed0e6bc1..0a121b3efb58 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -24,7 +24,11 @@
#ifndef DRM_FOURCC_H
#define DRM_FOURCC_H

+#ifndef DRM_FOURCC_STANDALONE_
+/* include the linux uapi types here */
+#else
#include "drm.h"
+#endif

#if defined(__cplusplus)
extern "C" {


Cheers, Daniel

>
>
> --
> Earthling Michel Dänzer               |               https://redhat.com
> Libre software enthusiast             |             Mesa and X developer
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch