Re: [PATCH 0/5] PowerManagement Toggle for PowerTOP

[Daniel Vetter <daniel@ffwll.ch>]

On Tue, Apr 12, 2016 at 12:18:43PM -0700, Alexandra Yates wrote:
> This project is explained in detail on the HAS
> https://docs.google.com/a/intel.com/document/d/1E-en_xqfHgCnhD1Tes3f08UYrOc-etv2W-pU0ZErKdE/edit?usp=sharing  
> 
> Summary: 
> Permits the user to identify and toggle values for PSR, FBC, RC6, DRRS, and IPS
> under /sys/class/drm/card0/power/.  By enabling these features I'm looking to
> empower our customers, such as, power team, chrome OS, and platform integration teams
> to debug graphics power management features. 
> 
> From the current patchset PSR, FBC, RC6, and, DRRS are complete and past BAT, modset,
> and suspend/resume tests.  For IPS I'm looking for feedback since IPS seems to change
> during runtime dynamically.  Additionally, as a future project IPS would be better 
> served if it is implemented by using the atomic check, pre-commit, commit, post-commit,
> a good example of this is the PSR enable/disable implementation.
> 
> For this project to be completed needs to have in place the following components:
> (Need to be developed)
> * IPS toggle interface flesh-out
> * Tests added to intel-gpu-tools repo
> * Documentation for all sysfs added interfaces
> * PowerTOP component named: GFX-TOP. With the following requirements:
> 	* It would be available only to developers
> 	* It would allow the developers to toggle the interfaces from
> 	  the PowerTOP user interface.  
> 	* It would show the Power Consumption impact of toggling on and off
> 	  these settings.      
>      
> Your review of this patchset is intended to contribute to its full
> maturity so that when we reach the PowerTOP development all pieces would
> be ready for commit.  

Nack. Testing PM stuff accurately is already a combinatorial nightmare, I
don't want more of this stuff. And for debugging the module options should
be good enough.
-Daniel

> 
> Thank you in advance,
> 
> Alexandra Yates (5):
>   drm/i915: Add sys PSR toggle interface
>   drm/i915: Add sys FBC toggle interface
>   drm/i915: Add sys RC6 toggle interface
>   drm/i915: Add sys drrs toggle interface
>   drm-i915: Add sys IPS toggle interface
> 
>  drivers/gpu/drm/i915/i915_debugfs.c  |   5 +-
>  drivers/gpu/drm/i915/i915_drv.c      |   5 +-
>  drivers/gpu/drm/i915/i915_drv.h      |  12 ++
>  drivers/gpu/drm/i915/i915_sysfs.c    | 362 ++++++++++++++++++++++++++++++++++-
>  drivers/gpu/drm/i915/intel_color.c   |  12 +-
>  drivers/gpu/drm/i915/intel_ddi.c     |  15 +-
>  drivers/gpu/drm/i915/intel_display.c |  55 ++++--
>  drivers/gpu/drm/i915/intel_dp.c      |  48 +++--
>  drivers/gpu/drm/i915/intel_drv.h     |  21 +-
>  drivers/gpu/drm/i915/intel_fbc.c     |  29 ++-
>  drivers/gpu/drm/i915/intel_pm.c      |  53 ++++-
>  drivers/gpu/drm/i915/intel_psr.c     |  36 +++-
>  12 files changed, 588 insertions(+), 65 deletions(-)
> 
> -- 
> 2.5.0
> 
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> Intel-gfx@lists.freedesktop.org
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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