FYI, when I rebased to drm-tip to test this there is now also a call to the old: "hsw_trans_edp_pipe_A_crc_wa" from "intel_crtc_set_crc_source". I replaced that in the same manner as you did in " pipe_crc_set_source". With that this was tested OK.
Tested-by: Marta Lofsted <marta.lofst...@intel.com> > -----Original Message----- > From: ville.syrj...@linux.intel.com [mailto:ville.syrj...@linux.intel.com] > Sent: Wednesday, August 16, 2017 5:39 PM > To: intel-gfx@lists.freedesktop.org > Cc: Zanoni, Paulo R <paulo.r.zan...@intel.com>; Daniel Vetter > <daniel.vet...@ffwll.ch>; Maarten Lankhorst > <maarten.lankho...@linux.intel.com>; Lofstedt, Marta > <marta.lofst...@intel.com> > Subject: [PATCH v2] drm/i915: Beef up the IPS vs. CRC workaround > > From: Ville Syrjälä <ville.syrj...@linux.intel.com> > > Oneshot disabling of IPS when CRC capturing is started is insufficient. > IPS may get re-enabled by any plane update, and hence tests that keep CRC > capturing on across plane updates will start to see inconsistent results as > soon as IPS kicks back in. Add a new knob into the crtc state to make sure IPS > stays disabled as long as CRC capturing is enabled. > > Forcing a modeset is the easiest way to handle this since that's already how > we do the panel fitter workaround. It's a little heavy handed just for IPS, > but > seeing as we might already do the panel fitter workaround I think it's better > to follow that. We migth want to optimize both cases later if someone gets > too upset by the extra delay from the modeset. > > v2: Check the right thing when deciding whether to force a modeset > > Cc: Paulo Zanoni <paulo.r.zan...@intel.com> > Cc: Daniel Vetter <daniel.vet...@ffwll.ch> > Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com> > Cc: Marta Lofstedt <marta.lofst...@intel.com> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101664 > Reviewed-by: Paulo Zanoni <paulo.r.zan...@intel.com> > Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com> > --- > drivers/gpu/drm/i915/intel_display.c | 5 +++- > drivers/gpu/drm/i915/intel_drv.h | 1 + > drivers/gpu/drm/i915/intel_pipe_crc.c | 43 +++++++++++++++++++---------- > ------ > 3 files changed, 28 insertions(+), 21 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_display.c > b/drivers/gpu/drm/i915/intel_display.c > index ef5dde5ab1cf..1ce479614f52 100644 > --- a/drivers/gpu/drm/i915/intel_display.c > +++ b/drivers/gpu/drm/i915/intel_display.c > @@ -7189,6 +7189,7 @@ static void hsw_compute_ips_config(struct > intel_crtc *crtc, > struct drm_i915_private *dev_priv = to_i915(dev); > > pipe_config->ips_enabled = i915.enable_ips && > + !pipe_config->ips_force_disable && > hsw_crtc_supports_ips(crtc) && > pipe_config_supports_ips(dev_priv, > pipe_config); } @@ -12958,7 +12959,7 @@ clear_intel_crtc_state(struct > intel_crtc_state *crtc_state) > struct intel_crtc_scaler_state scaler_state; > struct intel_dpll_hw_state dpll_hw_state; > struct intel_shared_dpll *shared_dpll; > - bool force_thru; > + bool force_thru, ips_force_disable; > > /* FIXME: before the switch to atomic started, a new > pipe_config was > * kzalloc'd. Code that depends on any field being zero should > be @@ -12970,6 +12971,7 @@ clear_intel_crtc_state(struct intel_crtc_state > *crtc_state) > shared_dpll = crtc_state->shared_dpll; > dpll_hw_state = crtc_state->dpll_hw_state; > force_thru = crtc_state->pch_pfit.force_thru; > + ips_force_disable = crtc_state->ips_force_disable; > > memset(crtc_state, 0, sizeof *crtc_state); > > @@ -12978,6 +12980,7 @@ clear_intel_crtc_state(struct intel_crtc_state > *crtc_state) > crtc_state->shared_dpll = shared_dpll; > crtc_state->dpll_hw_state = dpll_hw_state; > crtc_state->pch_pfit.force_thru = force_thru; > + crtc_state->ips_force_disable = ips_force_disable; > } > > static int > diff --git a/drivers/gpu/drm/i915/intel_drv.h > b/drivers/gpu/drm/i915/intel_drv.h > index 025e4c8b3e63..cadba9b92cc9 100644 > --- a/drivers/gpu/drm/i915/intel_drv.h > +++ b/drivers/gpu/drm/i915/intel_drv.h > @@ -651,6 +651,7 @@ struct intel_crtc_state { > struct intel_link_m_n fdi_m_n; > > bool ips_enabled; > + bool ips_force_disable; > > bool enable_fbc; > > diff --git a/drivers/gpu/drm/i915/intel_pipe_crc.c > b/drivers/gpu/drm/i915/intel_pipe_crc.c > index ef0c0e195164..74780b090d1e 100644 > --- a/drivers/gpu/drm/i915/intel_pipe_crc.c > +++ b/drivers/gpu/drm/i915/intel_pipe_crc.c > @@ -547,8 +547,8 @@ static int ilk_pipe_crc_ctl_reg(enum > intel_pipe_crc_source *source, > return 0; > } > > -static void hsw_trans_edp_pipe_A_crc_wa(struct drm_i915_private > *dev_priv, > - bool > enable) > +static void hsw_pipe_A_crc_wa(struct drm_i915_private *dev_priv, > + bool enable) > { > struct drm_device *dev = &dev_priv->drm; > struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, > PIPE_A); @@ -570,11 +570,23 @@ static void > hsw_trans_edp_pipe_A_crc_wa(struct drm_i915_private *dev_priv, > goto out; > } > > - pipe_config->pch_pfit.force_thru = enable; > - if (pipe_config->cpu_transcoder == TRANSCODER_EDP && > - pipe_config->pch_pfit.enabled != enable) > + /* > + * When IPS gets enabled, the pipe CRC changes. Since IPS gets > + * enabled and disabled dynamically based on package C > states, > + * user space can't make reliable use of the CRCs, so let's just > + * completely disable it. > + */ > + pipe_config->ips_force_disable = enable; > + if (pipe_config->ips_enabled == enable) > pipe_config->base.connectors_changed = true; > > + if (IS_HASWELL(dev_priv)) { > + pipe_config->pch_pfit.force_thru = enable; > + if (pipe_config->cpu_transcoder == > TRANSCODER_EDP && > + pipe_config->pch_pfit.enabled != enable) > + pipe_config- > >base.connectors_changed = true; > + } > + > ret = drm_atomic_commit(state); > out: > WARN(ret, "Toggling workaround to %i returns %i\n", enable, > ret); @@ -598,8 +610,9 @@ static int ivb_pipe_crc_ctl_reg(struct > drm_i915_private *dev_priv, > *val = PIPE_CRC_ENABLE | > PIPE_CRC_SOURCE_SPRITE_IVB; > break; > case INTEL_PIPE_CRC_SOURCE_PF: > - if (IS_HASWELL(dev_priv) && pipe == PIPE_A) > - > hsw_trans_edp_pipe_A_crc_wa(dev_priv, true); > + if ((IS_HASWELL(dev_priv) || > + IS_BROADWELL(dev_priv)) && pipe == > PIPE_A) > + hsw_pipe_A_crc_wa(dev_priv, > true); > > *val = PIPE_CRC_ENABLE | > PIPE_CRC_SOURCE_PF_IVB; > break; > @@ -618,7 +631,6 @@ static int pipe_crc_set_source(struct > drm_i915_private *dev_priv, > enum intel_pipe_crc_source > source) { > struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe]; > - struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, > pipe); > enum intel_display_power_domain power_domain; > u32 val = 0; /* shut up gcc */ > int ret; > @@ -665,14 +677,6 @@ static int pipe_crc_set_source(struct > drm_i915_private *dev_priv, > goto out; > } > > - /* > - * When IPS gets enabled, the pipe CRC > changes. Since IPS gets > - * enabled and disabled dynamically based on > package C states, > - * user space can't make reliable use of the > CRCs, so let's just > - * completely disable it. > - */ > - hsw_disable_ips(crtc); > - > spin_lock_irq(&pipe_crc->lock); > kfree(pipe_crc->entries); > pipe_crc->entries = entries; > @@ -713,10 +717,9 @@ static int pipe_crc_set_source(struct > drm_i915_private *dev_priv, > > g4x_undo_pipe_scramble_reset(dev_priv, pipe); > else if (IS_VALLEYVIEW(dev_priv) || > IS_CHERRYVIEW(dev_priv)) > > vlv_undo_pipe_scramble_reset(dev_priv, pipe); > - else if (IS_HASWELL(dev_priv) && pipe == > PIPE_A) > - > hsw_trans_edp_pipe_A_crc_wa(dev_priv, false); > - > - hsw_enable_ips(crtc); > + else if ((IS_HASWELL(dev_priv) || > + IS_BROADWELL(dev_priv)) && > pipe == PIPE_A) > + hsw_pipe_A_crc_wa(dev_priv, > false); > } > > ret = 0; > -- > 2.13.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
