Bug 33301

Summary: [RADEON:KMS:R600:DYNPM] dynpm doesn't downclock
Product: DRI Reporter: Cristian KLEIN <cristiklein>
Component: DRM/RadeonAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact:
Severity: normal    
Priority: medium    
Version: XOrg 6.7.0   
Hardware: Other   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Part of dmesg with power states none

Description Cristian KLEIN 2011-01-20 12:20:57 UTC 
Hello,

I have an ATI Mobility Radeon HD 2400. I am using Linux 2.6.37. Currently, dynpm does not down-clock the GPU for me. dmesg is filled with the following messages:

[245199.552075] [drm:r600_pm_get_dynpm_state], Requested: e: 30000 m: 40000 p: 16
(about 10 messages / second)

I attach a script with all the necessary details.

Cristi.
Comment 1 Cristian KLEIN 2011-03-08 11:58:14 UTC 
Created attachment 44245 [details]
Part of dmesg with power states

The problem is as follows. On r600, dynpm selects power state 1 and switches between clock modes to upclock / downclock. One can see that power state 1 is a performance power state, thus it does not include a low-power clock mode. In my case, it would be preferable for dynpm to use power state 2. Ideally, users should be able to select between low-power dynpm and performance dynpm.
Comment 2 Martin Peres 2019-11-19 08:17:27 UTC 
-- GitLab Migration Automatic Message --

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