RADEON / DPM: GPU cannot properly up-clock

[Joshua C.]

2013/6/26 Deucher, Alexander <Alexander.Deucher at amd.com>:
>
>
>> -----Original Message-----
>> From: Joshua C. [mailto:joshuacov at gmail.com]
>> Sent: Wednesday, June 26, 2013 1:52 PM
>> To: dri-devel at lists.freedesktop.org
>> Cc: Deucher, Alexander
>> Subject: RADEON / DPM: GPU cannot properly up-clock
>>
>> First of all thank you guys for pushing this out! Great work!
>>
>> I tried the latest code in drm-next-3.11-wip (up to commit
>> b3c1e0c3ba885db44 "drm/radeon: fix endian issues in atombios dpm
>> code") in connection with the latest radeon_ucode (latest update on
>> 2013-06-26). I also reintroduced the debugfs info so that I can better
>> observe the gpu-settings. For this I put back the following patch:
>>
>> diff --git a/drivers/gpu/drm/radeon/radeon_pm.c
>> b/drivers/gpu/drm/radeon/radeon_pm.c
>> index 7ba5d6f..9367234 100644
>> --- a/drivers/gpu/drm/radeon/radeon_pm.c
>> +++ b/drivers/gpu/drm/radeon/radeon_pm.c
>> @@ -1066,6 +1066,11 @@ static int radeon_pm_init_dpm(struct
>> radeon_device *rdev)
>>          ret = device_create_file(rdev->dev, &dev_attr_power_method);
>>          if (ret)
>>              DRM_ERROR("failed to create device file for power method\n");
>> +
>> +        if (radeon_debugfs_pm_init(rdev)) {
>> +            DRM_ERROR("Failed to register debugfs file for PM!\n");
>> +        }
>> +
>>          DRM_INFO("radeon: dpm initialized\n");
>>      }
>>
>> --
>> 1.8.2.1
>
> I removed that code for a reason when DPM is active.  With DPM the hardware changes the power state dynamically internally so that old debugging information is completely irrelevant when DPM is active.
>
> Alex
>
>

I see. Do you have any idea why I see those delays when playing a
HD-movie? They do not appear when switching to dynpm. I use the latest
llvm(3.4svn), libdrm(2.4.45), mesa(9.2.0 devel), xserver(1.14.99.0),
xf86-video-ati(deve) - all fetched from git as of 2013-06-26.

--
--joshua