On Thu, Sep 19, 2024 at 12:04:27PM +0300, Jani Nikula wrote: > The intel_pps_reset_all() function does similar but not quite the same > things for VLV/CHV and BXT/GLK. Observe that it's called from platform > specific code only, and a split to two functions vlv_pps_reset_all() and > bxt_pps_reset_all() is natural. > > Remove the platform checks and warnings from the functions. We don't > usually have them, unless we're unsure. To make this easier to reason > about for BXT/GLK, change the condition on caller side from "!PCH" to > "BXT || GLK". > > Suggested-by: Ville Syrjälä <[email protected]> > Signed-off-by: Jani Nikula <[email protected]>
Reviewed-by: Ville Syrjälä <[email protected]> > --- > .../i915/display/intel_display_power_well.c | 11 +++--- > drivers/gpu/drm/i915/display/intel_pps.c | 34 +++++++++++-------- > drivers/gpu/drm/i915/display/intel_pps.h | 3 +- > 3 files changed, 27 insertions(+), 21 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.c > b/drivers/gpu/drm/i915/display/intel_display_power_well.c > index 1898aff50ac4..adaf7cf3a33b 100644 > --- a/drivers/gpu/drm/i915/display/intel_display_power_well.c > +++ b/drivers/gpu/drm/i915/display/intel_display_power_well.c > @@ -879,12 +879,11 @@ void bxt_enable_dc9(struct intel_display *display) > > drm_dbg_kms(display->drm, "Enabling DC9\n"); > /* > - * Power sequencer reset is not needed on > - * platforms with South Display Engine on PCH, > - * because PPS registers are always on. > + * Power sequencer reset is needed on BXT/GLK, because the PPS registers > + * aren't always on, unlike with South Display Engine on PCH. > */ > - if (!HAS_PCH_SPLIT(dev_priv)) > - intel_pps_reset_all(display); > + if (IS_BROXTON(dev_priv) || IS_GEMINILAKE(dev_priv)) > + bxt_pps_reset_all(display); > gen9_set_dc_state(display, DC_STATE_EN_DC9); > } > > @@ -1270,7 +1269,7 @@ static void vlv_display_power_well_deinit(struct > drm_i915_private *dev_priv) > /* make sure we're done processing display irqs */ > intel_synchronize_irq(dev_priv); > > - intel_pps_reset_all(display); > + vlv_pps_reset_all(display); > > /* Prevent us from re-enabling polling on accident in late suspend */ > if (!dev_priv->drm.dev->power.is_suspended) > diff --git a/drivers/gpu/drm/i915/display/intel_pps.c > b/drivers/gpu/drm/i915/display/intel_pps.c > index 819b2843946f..88abc4c7cda1 100644 > --- a/drivers/gpu/drm/i915/display/intel_pps.c > +++ b/drivers/gpu/drm/i915/display/intel_pps.c > @@ -70,7 +70,7 @@ intel_wakeref_t intel_pps_lock(struct intel_dp *intel_dp) > intel_wakeref_t wakeref; > > /* > - * See intel_pps_reset_all() why we need a power domain reference here. > + * See vlv_pps_reset_all() why we need a power domain reference here. > */ > wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_DISPLAY_CORE); > mutex_lock(&display->pps.mutex); > @@ -448,14 +448,10 @@ pps_initial_setup(struct intel_dp *intel_dp) > return intel_pps_is_valid(intel_dp); > } > > -void intel_pps_reset_all(struct intel_display *display) > +void vlv_pps_reset_all(struct intel_display *display) > { > - struct drm_i915_private *dev_priv = to_i915(display->drm); > struct intel_encoder *encoder; > > - if (drm_WARN_ON(display->drm, !IS_LP(dev_priv))) > - return; > - > if (!HAS_DISPLAY(display)) > return; > > @@ -472,16 +468,26 @@ void intel_pps_reset_all(struct intel_display *display) > for_each_intel_dp(display->drm, encoder) { > struct intel_dp *intel_dp = enc_to_intel_dp(encoder); > > - if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) > - drm_WARN_ON(display->drm, > - intel_dp->pps.vlv_active_pipe != > INVALID_PIPE); > - > - if (encoder->type != INTEL_OUTPUT_EDP) > - continue; > + drm_WARN_ON(display->drm, intel_dp->pps.vlv_active_pipe != > INVALID_PIPE); > > - if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) > + if (encoder->type == INTEL_OUTPUT_EDP) > intel_dp->pps.vlv_pps_pipe = INVALID_PIPE; > - else > + } > +} > + > +void bxt_pps_reset_all(struct intel_display *display) > +{ > + struct intel_encoder *encoder; > + > + if (!HAS_DISPLAY(display)) > + return; > + > + /* See vlv_pps_reset_all() for why we can't grab pps_mutex here. */ > + > + for_each_intel_dp(display->drm, encoder) { > + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); > + > + if (encoder->type == INTEL_OUTPUT_EDP) > intel_dp->pps.bxt_pps_reset = true; > } > } > diff --git a/drivers/gpu/drm/i915/display/intel_pps.h > b/drivers/gpu/drm/i915/display/intel_pps.h > index a5339a65485d..bc5046d53626 100644 > --- a/drivers/gpu/drm/i915/display/intel_pps.h > +++ b/drivers/gpu/drm/i915/display/intel_pps.h > @@ -43,7 +43,6 @@ void intel_pps_wait_power_cycle(struct intel_dp *intel_dp); > bool intel_pps_init(struct intel_dp *intel_dp); > void intel_pps_init_late(struct intel_dp *intel_dp); > void intel_pps_encoder_reset(struct intel_dp *intel_dp); > -void intel_pps_reset_all(struct intel_display *display); > > void vlv_pps_pipe_init(struct intel_dp *intel_dp); > void vlv_pps_pipe_reset(struct intel_dp *intel_dp); > @@ -52,6 +51,8 @@ void vlv_pps_port_enable_unlocked(struct intel_encoder > *encoder, > const struct intel_crtc_state *crtc_state); > void vlv_pps_port_disable(struct intel_encoder *encoder, > const struct intel_crtc_state *crtc_state); > +void vlv_pps_reset_all(struct intel_display *display); > +void bxt_pps_reset_all(struct intel_display *display); > > void intel_pps_unlock_regs_wa(struct intel_display *display); > void intel_pps_setup(struct intel_display *display); > -- > 2.39.2 -- Ville Syrjälä Intel
