From b04c5bd6fda54703e56f29569e4bca489d6c5a5c Mon Sep 17 00:00:00 2001 From: Borun Fu Date: Sat, 12 Jul 2014 10:02:27 +0530 Subject: [PATCH] drm/i915: Power gating display wells during i915_pm_suspend On VLV, after i915_pm_suspend display power wells are staying power ungated. So, after initiating mem sleep "echo mem > /sys/power/state" Display is staing D0 State. There might be better way/place to power gate these wells. Also, we need to make sure that if wells are power gated due to DPMS OFF sequence, they need not be turned off by i915_pm_suspend again. v2: Extracted helper for intel_crtc_disable and power gating CRTC power wells. [Daniel] Cc: Imre Deak Cc: Paulo Zanoni Cc: Daniel Vetter Cc: Jani Nikula Change-Id: I34c80da66aa24c423a5576c68aa1f3a8d0f43848 Signed-off-by: Borun Fu Signed-off-by: Sagar Kamble Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_drv.c | 7 +++---- drivers/gpu/drm/i915/i915_drv.h | 4 ++++ drivers/gpu/drm/i915/intel_display.c | 30 ++++++++++++++++------------ drivers/gpu/drm/i915/intel_drv.h | 1 + 4 files changed, 25 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 23139aaa9431..de7d9a73eb2b 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -525,12 +525,11 @@ static int i915_drm_freeze(struct drm_device *dev) /* * Disable CRTCs directly since we want to preserve sw state - * for _thaw. + * for _thaw. Also, power gate the CRTC power wells. */ drm_modeset_lock_all(dev); - for_each_crtc(dev, crtc) { - dev_priv->display.crtc_disable(crtc); - } + for_each_crtc(dev, crtc) + intel_crtc_control(crtc, false); drm_modeset_unlock_all(dev); intel_modeset_suspend_hw(dev); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 8620ea91e108..1c6640118a70 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -179,6 +179,10 @@ enum hpd_pin { list_for_each_entry((intel_connector), &(dev)->mode_config.connector_list, base.head) \ if ((intel_connector)->base.encoder == (__encoder)) +#define for_each_power_domain(domain, mask) \ + for ((domain) = 0; (domain) < POWER_DOMAIN_NUM; (domain)++) \ + if ((1 << (domain)) & (mask)) + struct drm_i915_private; struct i915_mmu_object; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index d2b752dd0aaf..7e0dc46ec505 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4300,10 +4300,6 @@ static void i9xx_pfit_enable(struct intel_crtc *crtc) I915_WRITE(BCLRPAT(crtc->pipe), 0); } -#define for_each_power_domain(domain, mask) \ - for ((domain) = 0; (domain) < POWER_DOMAIN_NUM; (domain)++) \ - if ((1 << (domain)) & (mask)) - enum intel_display_power_domain intel_display_port_power_domain(struct intel_encoder *intel_encoder) { @@ -4872,21 +4868,14 @@ static void intel_crtc_update_sarea(struct drm_crtc *crtc, } } -/** - * Sets the power management mode of the pipe and plane. - */ -void intel_crtc_update_dpms(struct drm_crtc *crtc) +/* Master function to enable/disable CRTC and corresponding power wells */ +void intel_crtc_control(struct drm_crtc *crtc, bool enable) { struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - struct intel_encoder *intel_encoder; enum intel_display_power_domain domain; unsigned long domains; - bool enable = false; - - for_each_encoder_on_crtc(dev, crtc, intel_encoder) - enable |= intel_encoder->connectors_active; if (enable) { if (!intel_crtc->active) { @@ -4907,6 +4896,21 @@ void intel_crtc_update_dpms(struct drm_crtc *crtc) intel_crtc->enabled_power_domains = 0; } } +} + +/** + * Sets the power management mode of the pipe and plane. + */ +void intel_crtc_update_dpms(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct intel_encoder *intel_encoder; + bool enable = false; + + for_each_encoder_on_crtc(dev, crtc, intel_encoder) + enable |= intel_encoder->connectors_active; + + intel_crtc_control(crtc, enable); intel_crtc_update_sarea(crtc, enable); } diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index fa19744ed6c0..b9540c01bab3 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -753,6 +753,7 @@ void intel_frontbuffer_flip(struct drm_device *dev, void intel_fb_obj_flush(struct drm_i915_gem_object *obj, bool retire); void intel_mark_idle(struct drm_device *dev); void intel_crtc_restore_mode(struct drm_crtc *crtc); +void intel_crtc_control(struct drm_crtc *crtc, bool enable); void intel_crtc_update_dpms(struct drm_crtc *crtc); void intel_encoder_destroy(struct drm_encoder *encoder); void intel_connector_dpms(struct drm_connector *, int mode); -- 2.39.5