Re: [Intel-gfx] [PATCH v4 1/1] drm/i915/bxt: Check BIOS RC6 setup before enabling RC6

2015-12-14 Thread Imre Deak
On pe, 2015-12-11 at 14:14 +0530, Sagar Arun Kamble wrote: > RC6 setup is shared between BIOS and Driver. BIOS sets up subset of RC6 > setup registers. If those are not setup Driver should not enable RC6. > For implementing this, driver can check RC_CTRL0 and RC_CTRL1 values > to know if BIOS has e

[Intel-gfx] [PATCH v4 1/1] drm/i915/bxt: Check BIOS RC6 setup before enabling RC6

2015-12-11 Thread Sagar Arun Kamble
RC6 setup is shared between BIOS and Driver. BIOS sets up subset of RC6 setup registers. If those are not setup Driver should not enable RC6. For implementing this, driver can check RC_CTRL0 and RC_CTRL1 values to know if BIOS has enabled HW/SW RC6. This will also enable user to control RC6 using B