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

bugzilla-daemon
2014-02-16T00:25:25Z

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