[Libva] Use libva as user without X

[Xiang, Haihao]

Hi,

According to your log, drmGetClient() is called twice.

>> ioctl(3, 0xc0286405, 0x7fffe00d6260)    = 0
>> ioctl(3, 0xc0286405, 0x7fffe00d6260)    = -1

Is /dev/dri/card0 using by other processes ? If yes, non-root user (non
master user indeed) can't use /dev/dri/card0, unless you use render
node. You can check /dev/dri/card0 is used or not by lsof:

$> sudo lsof /dev/dri/card0

Thanks
Haihao

> Hi Gwenole,
> 
> Am 08.10.2014 um 11:57 schrieb Gwenole Beauchesne:
> > Hi Thomas,
> >
> > 2014-10-08 11:30 GMT+02:00 Thomas Scheuermann <scheuermann at barco.com>:
> >> Hi,
> >>
> >> how can I use libva as non-root user on a system without X running?
> > - Check what group /dev/dri/card<n> or /dev/dri/renderD<n|0x80> belongs to
> > - Add your user to that group
> My user is in the video group and the device  is:
> crw-rw---- 1 root video 226,  0 Oct  8 09:16 /dev/dri/card0
> My kernel is 3.14
> But it doesn't work.
> My system is a debian wheezy with some backports like the kernel.
> >
> > e.g. on a Ubuntu system, /dev/dri/card0 is in the "video" group. If
> > you want a user X to access to the device, just add user X to the
> > "video" group too.
> >
> > Note: starting with Kernel >= 3.15, and with libva from git master,
> > you can use the device without authentication. This means that you can
> > have user Y logged in, and who has started a display server, while
> > still allowing user X to remote connect and use the device.
> >
> >> If I run vainfo as a non-root user, I get
> >>
> >> $ vainfo
> >> error: XDG_RUNTIME_DIR not set in the environment.
> >> error: can't connect to X server!
> >> libva info: VA-API version 0.35.1
> >> libva info: va_getDriverName() returns 1
> >> libva error: va_getDriverName() failed with operation
> >> failed,driver_name=i965
> >> vaInitialize failed with error code 1 (operation failed),exit
> >>
> >> If I do the same as root, I get
> >>
> >> # vainfo
> >> error: XDG_RUNTIME_DIR not set in the environment.
> >> error: can't connect to X server!
> >> libva info: VA-API version 0.35.1
> >> libva info: va_getDriverName() returns 0
> >> libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
> >> libva info: Found init function __vaDriverInit_0_35
> >> libva info: va_openDriver() returns 0
> >> vainfo: VA-API version: 0.35 (libva 1.3.1)
> >> vainfo: Driver version: Intel i965 driver for Intel(R) Haswell Mobile -
> >> 1.3.2
> >> vainfo: Supported profile and entrypoints
> >>        VAProfileMPEG2Simple            :    VAEntrypointVLD
> >>        VAProfileMPEG2Simple            :    VAEntrypointEncSlice
> >>        VAProfileMPEG2Main              :    VAEntrypointVLD
> >>        VAProfileMPEG2Main              :    VAEntrypointEncSlice
> >>        VAProfileH264ConstrainedBaseline:    VAEntrypointVLD
> >>        VAProfileH264ConstrainedBaseline:    VAEntrypointEncSlice
> >>        VAProfileH264Main               :    VAEntrypointVLD
> >>        VAProfileH264Main               :    VAEntrypointEncSlice
> >>        VAProfileH264High               :    VAEntrypointVLD
> >>        VAProfileH264High               :    VAEntrypointEncSlice
> >>        VAProfileVC1Simple              :    VAEntrypointVLD
> >>        VAProfileVC1Main                :    VAEntrypointVLD
> >>        VAProfileVC1Advanced            :    VAEntrypointVLD
> >>        VAProfileNone                   :    VAEntrypointVideoProc
> >>        VAProfileJPEGBaseline           :    VAEntrypointVLD
> >>
> >> The difference is in the ioctl to /dev/dri/card0. As non-root user I get:
> >>
> >> ioctl(3, 0xc0406400, 0x14786c0)         = 0
> >> ioctl(3, 0xc0406400, 0x14786c0)         = 0
> >> ioctl(3, 0x80046402, 0x7fffe00d6300)    = 0
> >> ioctl(3, 0xc0286405, 0x7fffe00d6260)    = 0
> >> ioctl(3, 0xc0286405, 0x7fffe00d6260)    = -1 EINVAL (Invalid argument)
> >> futex(0x7f549de7a0ec, FUTEX_WAKE_PRIVATE, 2147483647) = 0
> >> ioctl(3, 0x40046411, 0x7fffe00d62e0)    = -1 EACCES (Permission denied)
> >> write(2, "libva info: va_getDriverName() r"..., 41libva info:
> >> va_getDriverName() returns 1
> >> ) = 41
> >> write(2, "libva error: va_getDriverName() "..., 78libva error:
> >> va_getDriverName() failed with operation failed,driver_name=i965
> >> ) = 78
> >>
> >> but as root I get:
> >>
> >> ioctl(3, 0xc0406400, 0x10656c0)         = 0
> >> ioctl(3, 0xc0406400, 0x10656c0)         = 0
> >> ioctl(3, 0x80046402, 0x7fff4a5b24b0)    = 0
> >> ioctl(3, 0xc0286405, 0x7fff4a5b2410)    = 0
> >> write(2, "libva info: va_getDriverName() r"..., 41libva info:
> >> va_getDriverName() returns 0
> >> ) = 41
> >> geteuid()                               = 0
> >> getuid()                                = 0
> >> write(2, "libva info: Trying to open /usr/"..., 75libva info: Trying to
> >> open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
> >> ) = 75
> >>
> >> Regards,
> >>
> >> Thomas
> >> This message is subject to the following terms and conditions: MAIL
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> > Regards,
> 
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