drm_common: utilize drmGetDevices when iterating over cards

Based on the idea behind emersion's change to drm_info
(https://github.com/ascent12/drm_info/commit/869e789a645b92a99e592a230fe39b0c59a2cd7d).

Lets us by default skip devices which are not capable of doing what
the DRM master output requires (not primary devices), as some devices
have card0 actually not be such.

Negative part is that the number given to drm-connector is no
longer a direct mapping against a file name.

1 files changed, 1 insertions, 1 deletions

diff --git a/wscript b/wscript
index 289cd9771b..4012fa1f7d 100644
--- a/wscript
+++ b/wscript
@@ -487,7 +487,7 @@ video_output_features = [
         'name': '--drm',
         'desc': 'DRM',
         'deps': 'vt.h || consio.h',
-        'func': check_pkg_config('libdrm', '>= 2.4.74'),
+        'func': check_pkg_config('libdrm', '>= 2.4.75'),
     }, {
         'name': '--gbm',
         'desc': 'GBM',