[Intel-gfx] [PATCH v6] drm/i915/vlv: WA to fix Voltage not getting dropped to Vmin when Gfx is power gated.

[S, Deepak]

On 1/31/2014 10:40 PM, Ville Syrjälä wrote:
> On Thu, Jan 30, 2014 at 11:08:16PM +0530, deepak.s at intel.com wrote:
>> From: Deepak S <deepak.s at intel.com>
>>
>> When we enter RC6 and GFX Clocks are off, the voltage remains higher
>> than Vmin. When we try to set the freq to RPn, it might fail since the
>> Gfx clocks are down. So to fix this in Gfx idle, Bring the GFX clock up
>> and set the freq to RPn then move GFx down.
>>
>> v2: remove vlv_update_rps_cur_delay function. Update commit message (Daniel)
>>
>> v3: Fix the timeout during wait for gfx clock (Jesse)
>>
>> v4: addressed comments on set freq and punit wait (Ville)
>>
>> v5: use wait_for while waiting for GFX clk to be up. (Daniel)
>>      update cur_delay before requesting min_delay. (Ville)
>>
>> v6: use wait_for while waiting for punit. (Ville)
>>
>> Signed-off-by: Deepak S <deepak.s at intel.com>
>> Reviewed-by: Ville Syrjä <ville.syrjala at linux.intel.com>
>                            ^^
>
> Stuff missing from my name.
Sorry Something got missed while uploading the patch :(