Bump libdrm dependency to 2.4.95

96bef0517e "drm-backend: add support for
writeback connectors" started using DRM_MODE_CONNECTOR_WRITEBACK and
DRM_CLIENT_CAP_WRITEBACK_CONNECTORS. These were introduced in libdrm
2.4.95.

According to
https://gitlab.freedesktop.org/wayland/weston/-/merge_requests/311
Ubunut Xenial is the only mentioned distribution that does not provide a
libdrm new enough. I think that is fine to drop now, 2016 was a good
while ago.

Libdrm 2.4.95 also introduced DRM_CLIENT_CAP_ASPECT_RATIO,
DRM_MODE_PICTURE_ASPECT_64_27, DRM_MODE_PICTURE_ASPECT_256_135.

The fallback definitions for the above are dropped.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

libweston/backend-drm/drm-internal.h

@@ -60,10 +60,6 @@
 #include "backend.h"
 #include "libweston-internal.h"
 
-#ifndef DRM_CLIENT_CAP_ASPECT_RATIO
-#define DRM_CLIENT_CAP_ASPECT_RATIO	4
-#endif
-
 #ifndef GBM_BO_USE_CURSOR
 #define GBM_BO_USE_CURSOR GBM_BO_USE_CURSOR_64X64
 #endif
@@ -114,17 +110,6 @@
 
 #define MAX_CLONED_CONNECTORS 4
 
-#ifndef DRM_MODE_PICTURE_ASPECT_64_27
-#define DRM_MODE_PICTURE_ASPECT_64_27		3
-#define  DRM_MODE_FLAG_PIC_AR_64_27 \
-			(DRM_MODE_PICTURE_ASPECT_64_27<<19)
-#endif
-#ifndef DRM_MODE_PICTURE_ASPECT_256_135
-#define DRM_MODE_PICTURE_ASPECT_256_135		4
-#define  DRM_MODE_FLAG_PIC_AR_256_135 \
-			(DRM_MODE_PICTURE_ASPECT_256_135<<19)
-#endif
-
 
 /**
  * Represents the values of an enum-type KMS property

meson.build

@@ -144,7 +144,7 @@ dep_libinput = dependency('libinput', version: '>= 0.8.0')
 dep_libevdev = dependency('libevdev')
 dep_libm = cc.find_library('m')
 dep_libdl = cc.find_library('dl')
-dep_libdrm = dependency('libdrm', version: '>= 2.4.86')
+dep_libdrm = dependency('libdrm', version: '>= 2.4.95')
 dep_libdrm_headers = dep_libdrm.partial_dependency(compile_args: true)
 dep_threads = dependency('threads')