On Mon, Aug 26, 2019 at 10:43:36AM -0700, Runyan, Arthur J wrote:
-----Original Message----- From: Imre Deak <imre.d...@intel.com> Sent: Monday, 26 August, 2019 6:42 AM To: Souza, Jose <jose.so...@intel.com>; De Marchi, Lucas <lucas.demar...@intel.com>; Runyan, Arthur J <arthur.j.run...@intel.com> Cc: intel-gfx@lists.freedesktop.org; Pandiyan, Dhinakaran <dhinakaran.pandi...@intel.com> Subject: Re: [Intel-gfx] [PATCH v3 04/23] drm/i915/bdw+: Enable PSR in any eDP portOn Fri, Aug 23, 2019 at 01:20:36AM -0700, Lucas De Marchi wrote: > From: José Roberto de Souza <jose.so...@intel.com> > > From BDW+ the PSR registers moved from DDIA to transcoder, so any port > with a eDP panel connected can have PSR, so lets remove this > limitation. > > Cc: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com> > Cc: Rodrigo Vivi <rodrigo.v...@intel.com> > Signed-off-by: José Roberto de Souza <jose.so...@intel.com> > Signed-off-by: Lucas De Marchi <lucas.demar...@intel.com> > Reviewed-by: Anshuman Gupta <anshuman.gu...@intel.com> > --- > drivers/gpu/drm/i915/display/intel_psr.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c > index 81e3619cd905..0172b82858d9 100644 > --- a/drivers/gpu/drm/i915/display/intel_psr.c > +++ b/drivers/gpu/drm/i915/display/intel_psr.c > @@ -588,11 +588,9 @@ void intel_psr_compute_config(struct intel_dp *intel_dp, > > /* > * HSW spec explicitly says PSR is tied to port A. > - * BDW+ platforms have a instance of PSR registers per transcoder but > - * for now it only supports one instance of PSR, so lets keep it > - * hardcoded to PORT_A > + * BDW+ platforms have a instance of PSR registers per transcoder. > */ > - if (dig_port->base.port != PORT_A) { > + if (IS_HASWELL(dev_priv) && dig_port->base.port != PORT_A) { Based on an earlier discussion with Art, before TGL PSR is not supposed to be used anywhere else than port A. Art could you confirm that?Correct. PSR1 is limited to DDIA until Tigerlake. There are registers for PSR on the other transcoders/ports because of reuse, but hardware isn't fully hooked up or validated. PSR2 is still limited to DDIA on Tigerlake.
thank you both for confirming. José, I think we need to drop this patch and rebase the rest so we don't do anything before Tiger Lake. I will work on it. Lucas De Marchi
> DRM_DEBUG_KMS("PSR condition failed: Port not supported\n"); > return; > } > -- > 2.23.0 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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