Re: [Intel-gfx] [PATCH] drm/i915/dp: Prevent setting the LTTPR LT mode if no LTTPRs are detected

2021-01-28 Thread Almahallawy, Khaled
On Thu, 2021-01-21 at 15:15 +0200, Imre Deak wrote: > On Tue, Jan 19, 2021 at 08:47:25AM +0200, Almahallawy, Khaled wrote: > > On Mon, 2021-01-18 at 20:31 +0200, Imre Deak wrote: > > > Atm, the driver programs explicitly the default transparent link > > > training mode (0x55) to DP_PHY_REPEATER_MOD

Re: [Intel-gfx] [PATCH] drm/i915/dp: Prevent setting the LTTPR LT mode if no LTTPRs are detected

2021-01-21 Thread Imre Deak
On Tue, Jan 19, 2021 at 08:47:25AM +0200, Almahallawy, Khaled wrote: > On Mon, 2021-01-18 at 20:31 +0200, Imre Deak wrote: > > Atm, the driver programs explicitly the default transparent link > > training mode (0x55) to DP_PHY_REPEATER_MODE even if no LTTPRs are > > detected. > > > > This conforms

Re: [Intel-gfx] [PATCH] drm/i915/dp: Prevent setting the LTTPR LT mode if no LTTPRs are detected

2021-01-18 Thread Almahallawy, Khaled
On Mon, 2021-01-18 at 20:31 +0200, Imre Deak wrote: > Atm, the driver programs explicitly the default transparent link > training mode (0x55) to DP_PHY_REPEATER_MODE even if no LTTPRs are > detected. > > This conforms to the spec (3.6.6.1): > "DP upstream devices that do not enable the Non-transpa

[Intel-gfx] [PATCH] drm/i915/dp: Prevent setting the LTTPR LT mode if no LTTPRs are detected

2021-01-18 Thread Imre Deak
Atm, the driver programs explicitly the default transparent link training mode (0x55) to DP_PHY_REPEATER_MODE even if no LTTPRs are detected. This conforms to the spec (3.6.6.1): "DP upstream devices that do not enable the Non-transparent mode of LTTPRs shall program the PHY_REPEATER_MODE registe