From: Daniel Vetter Date: Thu, 29 May 2014 12:10:22 +0000 (+0200) Subject: drm/i915: Support pf CRC source on haswell transcoder edp X-Git-Tag: v3.17-rc1~82^2~49^2~66 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=fabf6e513f640dac89645e1a98376eb8064394ee;p=~emulex%2Finfiniband.git drm/i915: Support pf CRC source on haswell transcoder edp The always-on power well pixel path on haswell is routed such that it bypasses the panel fitter when we use is. Which means the pfit CRC source won't work in that configuration. Add a new disallow-bypass flags to the pfit pipe config state and set it when we want to use the pf CRC. Results in a bit of flicker, but should get the job done. We'll also undo do it afterwards to make sure other tests arent' negatively affected. Totally untested due to lack of hsw laptops around here. v2: s/disallow_bypass/force_power_well_on/ to avoid a double negative (Damien). v3: force_thru because roadsigns. v4: Don't forget the power wells! Also note that until the runtime pm for DPMS series is fully merged the simple disable/enable trick won't work since the ->crtc_mode_set callback is still required to do nasty things. This stuff is tricky, but I think by both fixing up get_crtc_power_domains and the debugfs wa code we should always grab/drop the additional power well correctly. v5: Wrap in () as suggested by Damien to avoid setting reserved values for the edp transcoder path on bdw+ References: https://bugs.freedesktop.org/show_bug.cgi?id=72864 Cc: Damien Lespiau Reviewed-by: Damien Lespiau Tested-by: Damien Lespiau Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 8cc99369c79..bfd0d413045 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2867,7 +2867,60 @@ static int ilk_pipe_crc_ctl_reg(enum intel_pipe_crc_source *source, return 0; } -static int ivb_pipe_crc_ctl_reg(enum intel_pipe_crc_source *source, +static void hsw_trans_edp_pipe_A_crc_wa(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_crtc *crtc = + to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_A]); + + drm_modeset_lock_all(dev); + /* + * If we use the eDP transcoder we need to make sure that we don't + * bypass the pfit, since otherwise the pipe CRC source won't work. Only + * relevant on hsw with pipe A when using the always-on power well + * routing. + */ + if (crtc->config.cpu_transcoder == TRANSCODER_EDP && + !crtc->config.pch_pfit.enabled) { + crtc->config.pch_pfit.force_thru = true; + + intel_display_power_get(dev_priv, + POWER_DOMAIN_PIPE_PANEL_FITTER(PIPE_A)); + + dev_priv->display.crtc_disable(&crtc->base); + dev_priv->display.crtc_enable(&crtc->base); + } + drm_modeset_unlock_all(dev); +} + +static void hsw_undo_trans_edp_pipe_A_crc_wa(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_crtc *crtc = + to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_A]); + + drm_modeset_lock_all(dev); + /* + * If we use the eDP transcoder we need to make sure that we don't + * bypass the pfit, since otherwise the pipe CRC source won't work. Only + * relevant on hsw with pipe A when using the always-on power well + * routing. + */ + if (crtc->config.pch_pfit.force_thru) { + crtc->config.pch_pfit.force_thru = false; + + dev_priv->display.crtc_disable(&crtc->base); + dev_priv->display.crtc_enable(&crtc->base); + + intel_display_power_put(dev_priv, + POWER_DOMAIN_PIPE_PANEL_FITTER(PIPE_A)); + } + drm_modeset_unlock_all(dev); +} + +static int ivb_pipe_crc_ctl_reg(struct drm_device *dev, + enum pipe pipe, + enum intel_pipe_crc_source *source, uint32_t *val) { if (*source == INTEL_PIPE_CRC_SOURCE_AUTO) @@ -2881,6 +2934,9 @@ static int ivb_pipe_crc_ctl_reg(enum intel_pipe_crc_source *source, *val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_SPRITE_IVB; break; case INTEL_PIPE_CRC_SOURCE_PF: + if (IS_HASWELL(dev) && pipe == PIPE_A) + hsw_trans_edp_pipe_A_crc_wa(dev); + *val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PF_IVB; break; case INTEL_PIPE_CRC_SOURCE_NONE: @@ -2913,11 +2969,11 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe, else if (INTEL_INFO(dev)->gen < 5) ret = i9xx_pipe_crc_ctl_reg(dev, pipe, &source, &val); else if (IS_VALLEYVIEW(dev)) - ret = vlv_pipe_crc_ctl_reg(dev,pipe, &source, &val); + ret = vlv_pipe_crc_ctl_reg(dev, pipe, &source, &val); else if (IS_GEN5(dev) || IS_GEN6(dev)) ret = ilk_pipe_crc_ctl_reg(&source, &val); else - ret = ivb_pipe_crc_ctl_reg(&source, &val); + ret = ivb_pipe_crc_ctl_reg(dev, pipe, &source, &val); if (ret != 0) return ret; @@ -2969,6 +3025,8 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe, g4x_undo_pipe_scramble_reset(dev, pipe); else if (IS_VALLEYVIEW(dev)) vlv_undo_pipe_scramble_reset(dev, pipe); + else if (IS_HASWELL(dev) && pipe == PIPE_A) + hsw_undo_trans_edp_pipe_A_crc_wa(dev); } return 0; diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index efaf44b5ff2..6cc79c83772 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -995,7 +995,9 @@ void intel_ddi_enable_transcoder_func(struct drm_crtc *crtc) * eDP when not using the panel fitter, and when not * using motion blur mitigation (which we don't * support). */ - if (IS_HASWELL(dev) && intel_crtc->config.pch_pfit.enabled) + if (IS_HASWELL(dev) && + (intel_crtc->config.pch_pfit.enabled || + intel_crtc->config.pch_pfit.force_thru)) temp |= TRANS_DDI_EDP_INPUT_A_ONOFF; else temp |= TRANS_DDI_EDP_INPUT_A_ON; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index b961122ad51..8043e4b51ec 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4350,7 +4350,6 @@ static unsigned long get_crtc_power_domains(struct drm_crtc *crtc) struct intel_encoder *intel_encoder; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); enum pipe pipe = intel_crtc->pipe; - bool pfit_enabled = intel_crtc->config.pch_pfit.enabled; unsigned long mask; enum transcoder transcoder; @@ -4358,7 +4357,8 @@ static unsigned long get_crtc_power_domains(struct drm_crtc *crtc) mask = BIT(POWER_DOMAIN_PIPE(pipe)); mask |= BIT(POWER_DOMAIN_TRANSCODER(transcoder)); - if (pfit_enabled) + if (intel_crtc->config.pch_pfit.enabled || + intel_crtc->config.pch_pfit.force_thru) mask |= BIT(POWER_DOMAIN_PIPE_PANEL_FITTER(pipe)); for_each_encoder_on_crtc(dev, crtc, intel_encoder) diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 45afd25f936..9da665a1cd3 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -338,6 +338,7 @@ struct intel_crtc_config { u32 pos; u32 size; bool enabled; + bool force_thru; } pch_pfit; /* FDI configuration, only valid if has_pch_encoder is set. */