From e4889e20bd4314fbf09c0f388aa5861772aacbdc Mon Sep 17 00:00:00 2001
From: Jeffy Chen <jeffy.chen@rock-chips.com>
Date: Mon, 1 Apr 2024 10:49:42 +0800
Subject: [PATCH] HACK: drm: Bypass auth APIs by default

There're hacks in Rockchip's BSP kernels to ignore drm auth, so we can
bypass the related drm auth APIs here.

Bypass these auth APIs:
drmSetMaster, drmDropMaster.

Set these environments to enable:
"DRM_SET_MASTER", "DRM_DROP_MASTER".

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
---
 common/drm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/common/drm.c b/common/drm.c
index 06d6720..25315d3 100644
--- a/common/drm.c
+++ b/common/drm.c
@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include <string.h>
 #include <sys/ioctl.h>
 #include <sys/types.h>
@@ -14,10 +15,16 @@
 #define STR_HAS_PREFIX(prefix, s) (strncmp(prefix, s, STRLEN(prefix)) == 0)
 
 int drm_set_master(int fd) {
+	if (!getenv("DRM_SET_MASTER"))
+		return 0;
+
 	return ioctl(fd, DRM_IOCTL_SET_MASTER, 0);
 }
 
 int drm_drop_master(int fd) {
+	if (!getenv("DRM_DROP_MASTER"))
+		return 0;
+
 	return ioctl(fd, DRM_IOCTL_DROP_MASTER, 0);
 }
 
-- 
2.20.1