[Bug 70651] New: cannot write to power_dpm_force_performance_level: invalid argument (radeon 7730m)

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=70651

            Bug ID: 70651
           Summary: cannot write to power_dpm_force_performance_level:
                    invalid argument (radeon 7730m)
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.13.3
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: sjh+bugzillakernel@sanjioh.org
        Regression: No

Created attachment 126301
  --> https://bugzilla.kernel.org/attachment.cgi?id=126301&action=edit
3.13.3 dmesg

hi,

I'm using a notebook with intel ivy bridge + amd radeon 7730m hybrid graphics.
With the latest stable kernel (3.13.3) I can't echo (low, high, auto) to
/sys/class/drm/card0/device/power_dpm_force_performance_level:

root@darkstar:~# echo "high">
/sys/class/drm/card0/device/power_dpm_force_performance_level
-bash: echo: write error: Invalid argument
root@darkstar:~# echo "low"
/sys/class/drm/card0/device/power_dpm_force_performance_level 
low /sys/class/drm/card0/device/power_dpm_force_performance_level
root@darkstar:~# echo "auto"
/sys/class/drm/card0/device/power_dpm_force_performance_level 
auto /sys/class/drm/card0/device/power_dpm_force_performance_level

I cannot say it's a regression since I haven't tried previous kernels.
I can echo "battery", "performance" or "balanced" to
/sys/class/drm/card0/device/power_dpm_state


Some other info:

root@darkstar:~# cat
/sys/class/drm/card0/device/power_dpm_force_performance_level
auto

root@darkstar:~# lspci|grep VGA
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller (rev 09)
01:00.0 VGA compatible controller: AMD/ATI [Advanced Micro Devices, Inc.]
Chelsea LP [Radeon HD 7730M] (rev ff)

root@darkstar:~# cat /sys/kernel/debug/vgaswitcheroo/switch 
0:DIS: :DynOff:0000:01:00.0
1:IGD:+:Pwr:0000:00:02.0

root@darkstar:~# for i in /sys/class/drm/card0/device/power/*; do echo "$i:
$(cat $i)"; done
/sys/class/drm/card0/device/power/autosuspend_delay_ms: 5000
/sys/class/drm/card0/device/power/control: auto
/sys/class/drm/card0/device/power/runtime_active_time: 33415
/sys/class/drm/card0/device/power/runtime_status: suspended
/sys/class/drm/card0/device/power/runtime_suspended_time: 934700
/sys/class/drm/card0/device/power/wakeup: disabled
/sys/class/drm/card0/device/power/wakeup_abort_count: 
/sys/class/drm/card0/device/power/wakeup_active: 
/sys/class/drm/card0/device/power/wakeup_active_count: 
/sys/class/drm/card0/device/power/wakeup_count: 
/sys/class/drm/card0/device/power/wakeup_expire_count: 
/sys/class/drm/card0/device/power/wakeup_last_time_ms: 
/sys/class/drm/card0/device/power/wakeup_max_time_ms: 
/sys/class/drm/card0/device/power/wakeup_total_time_ms:

root@darkstar:~# cat /sys/kernel/debug/dri/0/radeon_pm_info 
default engine clock: 575000 kHz
current engine clock: 210280 kHz
default memory clock: 900000 kHz
current memory clock: 00 kHz
voltage: 825 mV
PCIE lanes: 16

(This last output is different from the ones I've seen around)

Am I missing something?
dmesg attached
Thanks

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