From 39c98fb81b5d10d58c2fd375c3f5279f2fb684bf Mon Sep 17 00:00:00 2001
From: Ben Hoff <hoff.benjamin.k@gmail.com>
Date: Thu, 7 Nov 2024 15:57:17 -0500
Subject: [PATCH] drop master on /dev/dri/card0 by default to avoid becoming
 the drm master

---
 osal/allocator/allocator_drm.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/osal/allocator/allocator_drm.c b/osal/allocator/allocator_drm.c
index 415dc9bb..ef30b2d5 100644
--- a/osal/allocator/allocator_drm.c
+++ b/osal/allocator/allocator_drm.c
@@ -183,8 +183,17 @@ static MPP_RET os_allocator_drm_open(void **ctx, size_t alignment, MppAllocFlagT
 
     for (i = 0; i < (RK_S32)MPP_ARRAY_ELEMS(dev_drm); i++) {
         fd = open(dev_drm[i], O_RDWR | O_CLOEXEC);
-        if (fd > 0)
+        if (fd > 0) {
+
+            if (strcmp(dev_drm[i], "/dev/dri/card0") == 0) {
+                int ret = drm_ioctl(fd, DRM_IOCTL_DROP_MASTER, 0);
+                if (ret < 0) {
+                    mpp_err_f("Drop master on %s failed!\n", dev_drm[i]);
+                }
+            }
+
             break;
+        }
     }
 
     if (fd < 0) {