From 7916201401d118b3c83e99d86f30663dd68fc883 Mon Sep 17 00:00:00 2001
From: Marco Migliori <sgerwk@aol.com>
Date: Fri, 9 Feb 2018 12:14:30 +0100
Subject: [PATCH] vo_drm: support --monitorpixelaspect

This commit allows for video to be shown with the right aspect even when
pixels are not square in the selected drm mode. For example, if drm mode
5 is "640x400", the right aspect on a 4:3 monitor is obtained by mpv
--vo=drm --drm-mode=5 --monitorpixelaspect=5:6 ...

Other vo's seem to make this parameter change the size of the window,
but in the drm vo this is fixed, being as large as the screen.
---
 video/out/vo_drm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/video/out/vo_drm.c b/video/out/vo_drm.c
index 8262fce88d..e66058657b 100644
--- a/video/out/vo_drm.c
+++ b/video/out/vo_drm.c
@@ -443,6 +443,8 @@ static int preinit(struct vo *vo)
         goto err;
     }
 
+    vo->monitor_par = 1 / vo->opts->monitor_pixel_aspect;
+
     return 0;
 
 err: