Dear All,
We are facing one issue related to drm and layer manager.
We are using below setup;
SOC:imx6 QUAD
BSP:Linux 3.1.17
Layer Manager : 1.1
Below components are using “/dev/dri/card0”
meucy17-t101-a0:~# lsof /dev/dri/card0
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Xorg 165 root mem CHR 226,0 1113 /dev/dri/card0
Xorg 165 root 12u CHR 226,0 0t0 1113 /dev/dri/card0
LayerMana 239 root mem CHR 226,0 1113 /dev/dri/card0
LayerMana 239 root 6u CHR 226,0 0t0 1113 /dev/dri/card0
Below ioctl is failing when called from Layermanger, which will return as permission denied(-EACCES);
DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
I am getting these kind of system logs:
type=SYSCALL msg=audit(07/30/18 12:58:38.890:23) : arch=armeb syscall=ioctl per=PER_LINUX_32BIT success=no exit=EACCES(Permission denied) a0=0x6 a1=0xc0106407 a2=0x768d9a28 a3=0x7 items=0 ppid=1 pid=1527 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root ses=unset tty=(none) comm=LayerManagerSer exe=/usr/bin/LayerManagerService key=DAC
If I changed the flag from DRM_MASTER to DRM_AUTH in drm driver, no errorlogs observed related to Layermanger.
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -69,7 +69,8 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
+ DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_AUTH),
I have following queries:
1. Is it ok to have the above changes?
2. With failure logs, there is no problem in system behavior. Can we ignore these system logs?
3. In logs we found that, Xorg setting the version, then why LayerManager again trying to change the version?
Thanks in advance.
Regards,
Ikshwaku
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