On Tue, 2023-10-31 at 23:21 +0000, Paz Zcharya wrote: > Currently, i915 fails fastset if both the sink and the source support > any version of PSR and regardless of the configuration setting of the > driver (i.e., i915.enable_psr kernel argument). However, the > implementation of PSR1 enable sequence is already seamless > and works smoothly with fastset. Accordingly, do not fail fastset > if PSR2 is not enabled. Thank you for the patch. Check similar patch I sent some time ago to trybot: https://patchwork.freedesktop.org/series/125392/ If we want to temporarily do this only for psr1 I think you could check what I've done in drivers/gpu/drm/i915/display/intel_display.c in my patch and modify your patch accordingly. Otherwise e.g. our IGT testcases which are toggling PSR enable/disable/psr1/psr2 are to my understanding performing full modeset and possible issues are not revealed. After modifying drivers/gpu/drm/i915/display/intel_display.c you can also verify it is really seamless and smooth by toggling different PSR states via /sys/kernel/debug/dri/0/i915_edp_psr_debug. That interface is performing atomic commit when PSR mode is changed. BR, Jouni Högander > > Signed-off-by: Paz Zcharya <pazz@xxxxxxxxxx> > --- > > drivers/gpu/drm/i915/display/intel_dp.c | 4 ++-- > drivers/gpu/drm/i915/display/intel_psr.c | 2 +- > drivers/gpu/drm/i915/display/intel_psr.h | 1 + > 3 files changed, 4 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c > b/drivers/gpu/drm/i915/display/intel_dp.c > index e0e4cb529284..a1af96e31518 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > @@ -2584,8 +2584,8 @@ bool intel_dp_initial_fastset_check(struct > intel_encoder *encoder, > fastset = false; > } > > - if (CAN_PSR(intel_dp)) { > - drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] Forcing full > modeset to compute PSR state\n", > + if (CAN_PSR(intel_dp) && psr2_global_enabled(intel_dp)) { > + drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] Forcing full > modeset due to PSR2\n", > encoder->base.base.id, encoder- > >base.name); > crtc_state->uapi.mode_changed = true; > fastset = false; > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c > b/drivers/gpu/drm/i915/display/intel_psr.c > index 97d5eef10130..388bc3246db9 100644 > --- a/drivers/gpu/drm/i915/display/intel_psr.c > +++ b/drivers/gpu/drm/i915/display/intel_psr.c > @@ -187,7 +187,7 @@ static bool psr_global_enabled(struct intel_dp > *intel_dp) > } > } > > -static bool psr2_global_enabled(struct intel_dp *intel_dp) > +bool psr2_global_enabled(struct intel_dp *intel_dp) > { > struct drm_i915_private *i915 = dp_to_i915(intel_dp); > > diff --git a/drivers/gpu/drm/i915/display/intel_psr.h > b/drivers/gpu/drm/i915/display/intel_psr.h > index 0b95e8aa615f..6f3c36389cd3 100644 > --- a/drivers/gpu/drm/i915/display/intel_psr.h > +++ b/drivers/gpu/drm/i915/display/intel_psr.h > @@ -21,6 +21,7 @@ struct intel_encoder; > struct intel_plane; > struct intel_plane_state; > > +bool psr2_global_enabled(struct intel_dp *intel_dp); > void intel_psr_init_dpcd(struct intel_dp *intel_dp); > void intel_psr_pre_plane_update(struct intel_atomic_state *state, > struct intel_crtc *crtc);
