RE: [PATCH 2/2] drm/i915/display: Allow display PHYs to reset power state

2025-01-30 Thread Kahola, Mika
> -Original Message- > From: Jani Nikula > Sent: Wednesday, 29 January 2025 16.45 > To: Kahola, Mika ; intel-gfx@lists.freedesktop.org; > intel- > x...@lists.freedesktop.org > Cc: Deak, Imre ; Kahola, Mika > Subject: Re: [PATCH 2/2] drm/i915/display: Allow dis

Re: [PATCH 2/2] drm/i915/display: Allow display PHYs to reset power state

2025-01-29 Thread Jani Nikula
On Wed, 29 Jan 2025, Mika Kahola wrote: > The dedicated display PHYs reset to a power state that blocks S0ix, > increasing idle system power. After a system reset (cold boot, > S3/4/5, warm reset) if a dedicated PHY is not being brought up > shortly, use these steps to move the PHY to the lowest p

[PATCH 2/2] drm/i915/display: Allow display PHYs to reset power state

2025-01-29 Thread Mika Kahola
The dedicated display PHYs reset to a power state that blocks S0ix, increasing idle system power. After a system reset (cold boot, S3/4/5, warm reset) if a dedicated PHY is not being brought up shortly, use these steps to move the PHY to the lowest power state to save power. 1. Follow the PLL Enab