From a950adc6c343c918e4728648f7a59ba42d79c1ce Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 30 Oct 2018 11:05:54 +0000 Subject: [PATCH] drm/i915: Stop calling intel_opregion unregister/register in suspend/resume If we reduce the suspend function for intel_opregion to do the minimum required, the resume function can also do the simple task of notifier the ACPI bios that we are back. This avoid some nasty restrictions on the likes of register_acpi_notifier() that are not allowed during the early phase of resume. v2: Keep the order of acpi notify vs turning off ardy/drdy the same. Signed-off-by: Chris Wilson Cc: Imre Deak Cc: Jani Nikula Reviewed-by: Jani Nikula Acked-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/20181030110554.4111-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_drv.c | 9 +- drivers/gpu/drm/i915/intel_opregion.c | 158 ++++++++++++++++++++-------------- drivers/gpu/drm/i915/intel_opregion.h | 15 ++++ 3 files changed, 111 insertions(+), 71 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 1ad13da..f6416b1 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1921,9 +1921,7 @@ static int i915_drm_suspend(struct drm_device *dev) i915_save_state(dev_priv); opregion_target_state = suspend_to_idle(dev_priv) ? PCI_D1 : PCI_D3cold; - intel_opregion_notify_adapter(dev_priv, opregion_target_state); - - intel_opregion_unregister(dev_priv); + intel_opregion_suspend(dev_priv, opregion_target_state); intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED, true); @@ -2042,7 +2040,6 @@ static int i915_drm_resume(struct drm_device *dev) i915_restore_state(dev_priv); intel_pps_unlock_regs_wa(dev_priv); - intel_opregion_setup(dev_priv); intel_init_pch_refclk(dev_priv); @@ -2084,12 +2081,10 @@ static int i915_drm_resume(struct drm_device *dev) * */ intel_hpd_init(dev_priv); - intel_opregion_register(dev_priv); + intel_opregion_resume(dev_priv); intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING, false); - intel_opregion_notify_adapter(dev_priv, PCI_D0); - intel_power_domains_enable(dev_priv); enable_rpm_wakeref_asserts(dev_priv); diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index e034b41..b8f106d 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -773,70 +773,6 @@ static void intel_setup_cadls(struct drm_i915_private *dev_priv) opregion->acpi->cadl[i] = 0; } -void intel_opregion_register(struct drm_i915_private *dev_priv) -{ - struct intel_opregion *opregion = &dev_priv->opregion; - - if (!opregion->header) - return; - - if (opregion->acpi) { - intel_didl_outputs(dev_priv); - intel_setup_cadls(dev_priv); - - /* Notify BIOS we are ready to handle ACPI video ext notifs. - * Right now, all the events are handled by the ACPI video module. - * We don't actually need to do anything with them. */ - opregion->acpi->csts = 0; - opregion->acpi->drdy = 1; - - opregion->acpi_notifier.notifier_call = intel_opregion_video_event; - register_acpi_notifier(&opregion->acpi_notifier); - } - - if (opregion->asle) { - opregion->asle->tche = ASLE_TCHE_BLC_EN; - opregion->asle->ardy = ASLE_ARDY_READY; - } -} - -void intel_opregion_unregister(struct drm_i915_private *dev_priv) -{ - struct intel_opregion *opregion = &dev_priv->opregion; - - if (!opregion->header) - return; - - if (opregion->asle) - opregion->asle->ardy = ASLE_ARDY_NOT_READY; - - cancel_work_sync(&dev_priv->opregion.asle_work); - - if (opregion->acpi) { - opregion->acpi->drdy = 0; - - unregister_acpi_notifier(&opregion->acpi_notifier); - opregion->acpi_notifier.notifier_call = NULL; - } - - /* just clear all opregion memory pointers now */ - memunmap(opregion->header); - if (opregion->rvda) { - memunmap(opregion->rvda); - opregion->rvda = NULL; - } - if (opregion->vbt_firmware) { - kfree(opregion->vbt_firmware); - opregion->vbt_firmware = NULL; - } - opregion->header = NULL; - opregion->acpi = NULL; - opregion->swsci = NULL; - opregion->asle = NULL; - opregion->vbt = NULL; - opregion->lid_state = NULL; -} - static void swsci_setup(struct drm_i915_private *dev_priv) { struct intel_opregion *opregion = &dev_priv->opregion; @@ -1115,3 +1051,97 @@ intel_opregion_get_panel_type(struct drm_i915_private *dev_priv) return ret - 1; } + +void intel_opregion_register(struct drm_i915_private *i915) +{ + struct intel_opregion *opregion = &i915->opregion; + + if (!opregion->header) + return; + + if (opregion->acpi) { + opregion->acpi_notifier.notifier_call = + intel_opregion_video_event; + register_acpi_notifier(&opregion->acpi_notifier); + } + + intel_opregion_resume(i915); +} + +void intel_opregion_resume(struct drm_i915_private *i915) +{ + struct intel_opregion *opregion = &i915->opregion; + + if (!opregion->header) + return; + + if (opregion->acpi) { + intel_didl_outputs(i915); + intel_setup_cadls(i915); + + /* + * Notify BIOS we are ready to handle ACPI video ext notifs. + * Right now, all the events are handled by the ACPI video + * module. We don't actually need to do anything with them. + */ + opregion->acpi->csts = 0; + opregion->acpi->drdy = 1; + } + + if (opregion->asle) { + opregion->asle->tche = ASLE_TCHE_BLC_EN; + opregion->asle->ardy = ASLE_ARDY_READY; + } + + intel_opregion_notify_adapter(i915, PCI_D0); +} + +void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state) +{ + struct intel_opregion *opregion = &i915->opregion; + + if (!opregion->header) + return; + + intel_opregion_notify_adapter(i915, state); + + if (opregion->asle) + opregion->asle->ardy = ASLE_ARDY_NOT_READY; + + cancel_work_sync(&i915->opregion.asle_work); + + if (opregion->acpi) + opregion->acpi->drdy = 0; +} + +void intel_opregion_unregister(struct drm_i915_private *i915) +{ + struct intel_opregion *opregion = &i915->opregion; + + intel_opregion_suspend(i915, PCI_D1); + + if (!opregion->header) + return; + + if (opregion->acpi_notifier.notifier_call) { + unregister_acpi_notifier(&opregion->acpi_notifier); + opregion->acpi_notifier.notifier_call = NULL; + } + + /* just clear all opregion memory pointers now */ + memunmap(opregion->header); + if (opregion->rvda) { + memunmap(opregion->rvda); + opregion->rvda = NULL; + } + if (opregion->vbt_firmware) { + kfree(opregion->vbt_firmware); + opregion->vbt_firmware = NULL; + } + opregion->header = NULL; + opregion->acpi = NULL; + opregion->swsci = NULL; + opregion->asle = NULL; + opregion->vbt = NULL; + opregion->lid_state = NULL; +} diff --git a/drivers/gpu/drm/i915/intel_opregion.h b/drivers/gpu/drm/i915/intel_opregion.h index e8498a8..d84b6d2 100644 --- a/drivers/gpu/drm/i915/intel_opregion.h +++ b/drivers/gpu/drm/i915/intel_opregion.h @@ -57,8 +57,14 @@ struct intel_opregion { #ifdef CONFIG_ACPI int intel_opregion_setup(struct drm_i915_private *dev_priv); + void intel_opregion_register(struct drm_i915_private *dev_priv); void intel_opregion_unregister(struct drm_i915_private *dev_priv); + +void intel_opregion_resume(struct drm_i915_private *dev_priv); +void intel_opregion_suspend(struct drm_i915_private *dev_priv, + pci_power_t state); + void intel_opregion_asle_intr(struct drm_i915_private *dev_priv); int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, bool enable); @@ -81,6 +87,15 @@ static inline void intel_opregion_unregister(struct drm_i915_private *dev_priv) { } +void intel_opregion_resume(struct drm_i915_private *dev_priv) +{ +} + +void intel_opregion_suspend(struct drm_i915_private *dev_priv, + pci_power_t state) +{ +} + static inline void intel_opregion_asle_intr(struct drm_i915_private *dev_priv) { } -- 2.7.4