On Mon, 2021-02-22 at 21:05 +0200, Gwan-gyeong Mun wrote: > Even though GEN12+ HW supports PSR + DC3CO, DMC's HW DC3CO exit mechanism > has an issue with using of Selective Fecth and PSR2 manual tracking. > And as some GEN12+ platforms (RKL, ADL-S) don't support PSR2 HW tracking, > Selective Fetch will be enabled by default on that platforms. > Therefore if the system enables PSR Selective Fetch / PSR manual tracking, > it does not allow DC3CO dc state, in that case. > > When this DC3CO exit issue is addressed while PSR Selective Fetch is > enabled, this restriction should be removed. > > Cc: José Roberto de Souza <jose.so...@intel.com> > Cc: Anshuman Gupta <anshuman.gu...@intel.com> > Signed-off-by: Gwan-gyeong Mun <gwan-gyeong....@intel.com> > --- > drivers/gpu/drm/i915/display/intel_psr.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c > b/drivers/gpu/drm/i915/display/intel_psr.c > index 7c6e561f86c1..7370de97e599 100644 > --- a/drivers/gpu/drm/i915/display/intel_psr.c > +++ b/drivers/gpu/drm/i915/display/intel_psr.c > @@ -654,6 +654,14 @@ tgl_dc3co_exitline_compute_config(struct intel_dp > *intel_dp, > struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); > u32 exit_scanlines; > > > > > + /* > + * DMC's DC3CO exit mechanism has an issue with Selective Fecth > + * TODO: when the issue is addressed, this restriction should be > removed. > + */ > + if (dev_priv->params.enable_psr2_sel_fetch || > + intel_dp->psr.debug == I915_PSR_DEBUG_ENABLE_SEL_FETCH) > + return;
crtc_state->enable_psr2_sel_fetch is a much better alternative. > + > if (!(dev_priv->csr.allowed_dc_mask & DC_STATE_EN_DC3CO)) > return; > > > > _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
