Ejemplo n.º 1
0
static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv,
				       struct i915_power_well *power_well)
{
	WARN_ON_ONCE(power_well->data != PIPE_A &&
		     power_well->data != PIPE_B &&
		     power_well->data != PIPE_C);

	chv_set_pipe_power_well(dev_priv, power_well, true);

	if (power_well->data == PIPE_A) {
		spin_lock_irq(&dev_priv->irq_lock);
		valleyview_enable_display_irqs(dev_priv);
		spin_unlock_irq(&dev_priv->irq_lock);

		/*
		 * During driver initialization/resume we can avoid restoring the
		 * part of the HW/SW state that will be inited anyway explicitly.
		 */
		if (dev_priv->power_domains.initializing)
			return;

		intel_hpd_init(dev_priv);

		i915_redisable_vga_power_on(dev_priv->dev);
	}
}
Ejemplo n.º 2
0
static int intel_runtime_resume(struct device *device)
{
	struct pci_dev *pdev = to_pci_dev(device);
	struct drm_device *dev = pci_get_drvdata(pdev);
	struct drm_i915_private *dev_priv = dev->dev_private;
	int ret = 0;

	if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev)))
		return -ENODEV;

	DRM_DEBUG_KMS("Resuming device\n");

	WARN_ON_ONCE(atomic_read(&dev_priv->pm.wakeref_count));
	disable_rpm_wakeref_asserts(dev_priv);

	intel_opregion_notify_adapter(dev, PCI_D0);
	dev_priv->pm.suspended = false;
	if (intel_uncore_unclaimed_mmio(dev_priv))
		DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n");

	intel_guc_resume(dev);

	if (IS_GEN6(dev_priv))
		intel_init_pch_refclk(dev);

	if (IS_BROXTON(dev))
		ret = bxt_resume_prepare(dev_priv);
	else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
		hsw_disable_pc8(dev_priv);
	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
		ret = vlv_resume_prepare(dev_priv, true);

	/*
	 * No point of rolling back things in case of an error, as the best
	 * we can do is to hope that things will still work (and disable RPM).
	 */
	i915_gem_init_swizzling(dev);
	gen6_update_ring_freq(dev);

	intel_runtime_pm_enable_interrupts(dev_priv);

	/*
	 * On VLV/CHV display interrupts are part of the display
	 * power well, so hpd is reinitialized from there. For
	 * everyone else do it here.
	 */
	if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
		intel_hpd_init(dev_priv);

	intel_enable_gt_powersave(dev);

	enable_rpm_wakeref_asserts(dev_priv);

	if (ret)
		DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret);
	else
		DRM_DEBUG_KMS("Device resumed\n");

	return ret;
}
Ejemplo n.º 3
0
static int __i915_drm_thaw(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int error = 0;

	i915_restore_state(dev);
	intel_opregion_setup(dev);

	/* KMS EnterVT equivalent */
	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
		intel_init_pch_refclk(dev);

		mutex_lock(&dev->struct_mutex);
		dev_priv->mm.suspended = 0;

		error = i915_gem_init_hw(dev);
		mutex_unlock(&dev->struct_mutex);

		/* We need working interrupts for modeset enabling ... */
		drm_irq_install(dev);

		intel_modeset_init_hw(dev);
		intel_modeset_setup_hw_state(dev, false);

		/*
		 * ... but also need to make sure that hotplug processing
		 * doesn't cause havoc. Like in the driver load code we don't
		 * bother with the tiny race here where we might loose hotplug
		 * notifications.
		 * */
		intel_hpd_init(dev);
		dev_priv->enable_hotplug_processing = true;
	}

	intel_opregion_init(dev);

	/*
	 * The console lock can be pretty contented on resume due
	 * to all the printk activity.  Try to keep it out of the hot
	 * path of resume if possible.
	 */
	if (console_trylock()) {
		intel_fbdev_set_suspend(dev, 0);
		console_unlock();
	} else {
		schedule_work(&dev_priv->console_resume_work);
	}

	mutex_lock(&dev_priv->modeset_restore_lock);
	dev_priv->modeset_restore = MODESET_DONE;
	mutex_unlock(&dev_priv->modeset_restore_lock);
	return error;
}
Ejemplo n.º 4
0
static int i915_drm_resume(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	disable_rpm_wakeref_asserts(dev_priv);

	mutex_lock(&dev->struct_mutex);
	i915_gem_restore_gtt_mappings(dev);
	mutex_unlock(&dev->struct_mutex);

	i915_restore_state(dev);
	intel_opregion_setup(dev);

	intel_init_pch_refclk(dev);
	drm_mode_config_reset(dev);

	/*
	 * Interrupts have to be enabled before any batches are run. If not the
	 * GPU will hang. i915_gem_init_hw() will initiate batches to
	 * update/restore the context.
	 *
	 * Modeset enabling in intel_modeset_init_hw() also needs working
	 * interrupts.
	 */
	intel_runtime_pm_enable_interrupts(dev_priv);

	mutex_lock(&dev->struct_mutex);
	if (i915_gem_init_hw(dev)) {
		DRM_ERROR("failed to re-initialize GPU, declaring wedged!\n");
			atomic_or(I915_WEDGED, &dev_priv->gpu_error.reset_counter);
	}
	mutex_unlock(&dev->struct_mutex);

	intel_guc_resume(dev);

	intel_modeset_init_hw(dev);

	spin_lock_irq(&dev_priv->irq_lock);
	if (dev_priv->display.hpd_irq_setup)
		dev_priv->display.hpd_irq_setup(dev);
	spin_unlock_irq(&dev_priv->irq_lock);

	intel_dp_mst_resume(dev);

	intel_display_resume(dev);

	/*
	 * ... but also need to make sure that hotplug processing
	 * doesn't cause havoc. Like in the driver load code we don't
	 * bother with the tiny race here where we might loose hotplug
	 * notifications.
	 * */
	intel_hpd_init(dev_priv);
	/* Config may have changed between suspend and resume */
	drm_helper_hpd_irq_event(dev);

	intel_opregion_init(dev);

	intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING, false);

	mutex_lock(&dev_priv->modeset_restore_lock);
	dev_priv->modeset_restore = MODESET_DONE;
	mutex_unlock(&dev_priv->modeset_restore_lock);

	intel_opregion_notify_adapter(dev, PCI_D0);

	drm_kms_helper_poll_enable(dev);

	enable_rpm_wakeref_asserts(dev_priv);

	return 0;
}
Ejemplo n.º 5
0
/**
 * i915_reset - reset chip after a hang
 * @dev: drm device to reset
 *
 * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 * reset or otherwise an error code.
 *
 * Procedure is fairly simple:
 *   - reset the chip using the reset reg
 *   - re-init context state
 *   - re-init hardware status page
 *   - re-init ring buffer
 *   - re-init interrupt state
 *   - re-init display
 */
int i915_reset(struct drm_device *dev)
{
	drm_i915_private_t *dev_priv = dev->dev_private;
	bool simulated;
	int ret;

	if (!i915_try_reset)
		return 0;

	mutex_lock(&dev->struct_mutex);

	i915_gem_reset(dev);

	simulated = dev_priv->gpu_error.stop_rings != 0;

	ret = intel_gpu_reset(dev);

	/* Also reset the gpu hangman. */
	if (simulated) {
		DRM_INFO("Simulated gpu hang, resetting stop_rings\n");
		dev_priv->gpu_error.stop_rings = 0;
		if (ret == -ENODEV) {
			DRM_INFO("Reset not implemented, but ignoring "
				 "error for simulated gpu hangs\n");
			ret = 0;
		}
	}

	if (ret) {
		DRM_ERROR("Failed to reset chip: %i\n", ret);
		mutex_unlock(&dev->struct_mutex);
		return ret;
	}

	/* Ok, now get things going again... */

	/*
	 * Everything depends on having the GTT running, so we need to start
	 * there.  Fortunately we don't need to do this unless we reset the
	 * chip at a PCI level.
	 *
	 * Next we need to restore the context, but we don't use those
	 * yet either...
	 *
	 * Ring buffer needs to be re-initialized in the KMS case, or if X
	 * was running at the time of the reset (i.e. we weren't VT
	 * switched away).
	 */
	if (drm_core_check_feature(dev, DRIVER_MODESET) ||
			!dev_priv->ums.mm_suspended) {
		dev_priv->ums.mm_suspended = 0;

		ret = i915_gem_init_hw(dev);
		mutex_unlock(&dev->struct_mutex);
		if (ret) {
			DRM_ERROR("Failed hw init on reset %d\n", ret);
			return ret;
		}

		drm_irq_uninstall(dev);
		drm_irq_install(dev);
		intel_hpd_init(dev);
	} else {
		mutex_unlock(&dev->struct_mutex);
	}

	return 0;
}
Ejemplo n.º 6
0
static int __i915_drm_thaw(struct drm_device *dev, bool restore_gtt_mappings)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int error = 0;

	intel_uncore_early_sanitize(dev);

	intel_uncore_sanitize(dev);

	if (drm_core_check_feature(dev, DRIVER_MODESET) &&
	    restore_gtt_mappings) {
		mutex_lock(&dev->struct_mutex);
		i915_gem_restore_gtt_mappings(dev);
		mutex_unlock(&dev->struct_mutex);
	}

	intel_power_domains_init_hw(dev);

	i915_restore_state(dev);
	intel_opregion_setup(dev);

	/* KMS EnterVT equivalent */
	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
		intel_init_pch_refclk(dev);

		mutex_lock(&dev->struct_mutex);

		error = i915_gem_init_hw(dev);
		mutex_unlock(&dev->struct_mutex);

		/* We need working interrupts for modeset enabling ... */
		drm_irq_install(dev);

		intel_modeset_init_hw(dev);

		drm_modeset_lock_all(dev);
		drm_mode_config_reset(dev);
		intel_modeset_setup_hw_state(dev, true);
		drm_modeset_unlock_all(dev);

		/*
		 * ... but also need to make sure that hotplug processing
		 * doesn't cause havoc. Like in the driver load code we don't
		 * bother with the tiny race here where we might loose hotplug
		 * notifications.
		 * */
		intel_hpd_init(dev);
		dev_priv->enable_hotplug_processing = true;
		/* Config may have changed between suspend and resume */
		intel_resume_hotplug(dev);
	}

	intel_opregion_init(dev);

	/*
	 * The console lock can be pretty contented on resume due
	 * to all the printk activity.  Try to keep it out of the hot
	 * path of resume if possible.
	 */
	if (console_trylock()) {
		intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);
		console_unlock();
	} else {
		schedule_work(&dev_priv->console_resume_work);
	}

	/* Undo what we did at i915_drm_freeze so the refcount goes back to the
	 * expected level. */
	hsw_enable_package_c8(dev_priv);

	mutex_lock(&dev_priv->modeset_restore_lock);
	dev_priv->modeset_restore = MODESET_DONE;
	mutex_unlock(&dev_priv->modeset_restore_lock);

	intel_runtime_pm_put(dev_priv);
	return error;
}
Ejemplo n.º 7
0
static int i915_load_modeset_init(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int ret;

	ret = intel_parse_bios(dev);
	if (ret)
		DRM_INFO("failed to find VBIOS tables\n");

	/* If we have > 1 VGA cards, then we need to arbitrate access
	 * to the common VGA resources.
	 *
	 * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
	 * then we do not take part in VGA arbitration and the
	 * vga_client_register() fails with -ENODEV.
	 */
	ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
	if (ret && ret != -ENODEV)
		goto out;

	intel_register_dsm_handler();

	ret = vga_switcheroo_register_client(dev->pdev, &i915_switcheroo_ops, false);
	if (ret)
		goto cleanup_vga_client;

	/* Initialise stolen first so that we may reserve preallocated
	 * objects for the BIOS to KMS transition.
	 */
	ret = i915_gem_init_stolen(dev);
	if (ret)
		goto cleanup_vga_switcheroo;

	intel_power_domains_init_hw(dev_priv);

	ret = intel_irq_install(dev_priv);
	if (ret)
		goto cleanup_gem_stolen;

	/* Important: The output setup functions called by modeset_init need
	 * working irqs for e.g. gmbus and dp aux transfers. */
	intel_modeset_init(dev);

	ret = i915_gem_init(dev);
	if (ret)
		goto cleanup_irq;

	intel_modeset_gem_init(dev);

	/* Always safe in the mode setting case. */
	/* FIXME: do pre/post-mode set stuff in core KMS code */
	dev->vblank_disable_allowed = true;
	if (INTEL_INFO(dev)->num_pipes == 0)
		return 0;

	ret = intel_fbdev_init(dev);
	if (ret)
		goto cleanup_gem;

	/* Only enable hotplug handling once the fbdev is fully set up. */
	intel_hpd_init(dev_priv);

	/*
	 * Some ports require correctly set-up hpd registers for detection to
	 * work properly (leading to ghost connected connector status), e.g. VGA
	 * on gm45.  Hence we can only set up the initial fbdev config after hpd
	 * irqs are fully enabled. Now we should scan for the initial config
	 * only once hotplug handling is enabled, but due to screwed-up locking
	 * around kms/fbdev init we can't protect the fdbev initial config
	 * scanning against hotplug events. Hence do this first and ignore the
	 * tiny window where we will loose hotplug notifactions.
	 */
	async_schedule(intel_fbdev_initial_config, dev_priv);

	drm_kms_helper_poll_init(dev);

	return 0;

cleanup_gem:
	mutex_lock(&dev->struct_mutex);
	i915_gem_cleanup_ringbuffer(dev);
	i915_gem_context_fini(dev);
	mutex_unlock(&dev->struct_mutex);
cleanup_irq:
	drm_irq_uninstall(dev);
cleanup_gem_stolen:
	i915_gem_cleanup_stolen(dev);
cleanup_vga_switcheroo:
	vga_switcheroo_unregister_client(dev->pdev);
cleanup_vga_client:
	vga_client_register(dev->pdev, NULL, NULL, NULL);
out:
	return ret;
}
Ejemplo n.º 8
0
/**
 * i915_reset - reset chip after a hang
 * @dev: drm device to reset
 *
 * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 * reset or otherwise an error code.
 *
 * Procedure is fairly simple:
 *   - reset the chip using the reset reg
 *   - re-init context state
 *   - re-init hardware status page
 *   - re-init ring buffer
 *   - re-init interrupt state
 *   - re-init display
 */
int i915_reset(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	bool simulated;
	int ret;

	if (!i915.reset)
		return 0;

	mutex_lock(&dev->struct_mutex);

	i915_gem_reset(dev);

	simulated = dev_priv->gpu_error.stop_rings != 0;

	ret = intel_gpu_reset(dev);

	/* Also reset the gpu hangman. */
	if (simulated) {
		DRM_INFO("Simulated gpu hang, resetting stop_rings\n");
		dev_priv->gpu_error.stop_rings = 0;
		if (ret == -ENODEV) {
			DRM_INFO("Reset not implemented, but ignoring "
				 "error for simulated gpu hangs\n");
			ret = 0;
		}
	}

	if (ret) {
		DRM_ERROR("Failed to reset chip: %i\n", ret);
		mutex_unlock(&dev->struct_mutex);
		return ret;
	}

	/* Ok, now get things going again... */

	/*
	 * Everything depends on having the GTT running, so we need to start
	 * there.  Fortunately we don't need to do this unless we reset the
	 * chip at a PCI level.
	 *
	 * Next we need to restore the context, but we don't use those
	 * yet either...
	 *
	 * Ring buffer needs to be re-initialized in the KMS case, or if X
	 * was running at the time of the reset (i.e. we weren't VT
	 * switched away).
	 */
	if (drm_core_check_feature(dev, DRIVER_MODESET) ||
			!dev_priv->ums.mm_suspended) {
		dev_priv->ums.mm_suspended = 0;

		ret = i915_gem_init_hw(dev);
		mutex_unlock(&dev->struct_mutex);
		if (ret) {
			DRM_ERROR("Failed hw init on reset %d\n", ret);
			return ret;
		}

		/*
		 * FIXME: This races pretty badly against concurrent holders of
		 * ring interrupts. This is possible since we've started to drop
		 * dev->struct_mutex in select places when waiting for the gpu.
		 */

		/*
		 * rps/rc6 re-init is necessary to restore state lost after the
		 * reset and the re-install of gt irqs. Skip for ironlake per
		 * previous concerns that it doesn't respond well to some forms
		 * of re-init after reset.
		 */
		if (INTEL_INFO(dev)->gen > 5)
			intel_reset_gt_powersave(dev);

		intel_hpd_init(dev);
	} else {
		mutex_unlock(&dev->struct_mutex);
	}

	return 0;
}
Ejemplo n.º 9
0
static int __i915_drm_thaw(struct drm_device *dev, bool restore_gtt_mappings)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	if (drm_core_check_feature(dev, DRIVER_MODESET) &&
	    restore_gtt_mappings) {
		mutex_lock(&dev->struct_mutex);
		i915_gem_restore_gtt_mappings(dev);
		mutex_unlock(&dev->struct_mutex);
	}

	i915_restore_state(dev);
	intel_opregion_setup(dev);

	/* KMS EnterVT equivalent */
	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
		intel_init_pch_refclk(dev);
		drm_mode_config_reset(dev);

		mutex_lock(&dev->struct_mutex);
		if (i915_gem_init_hw(dev)) {
			DRM_ERROR("failed to re-initialize GPU, declaring wedged!\n");
			atomic_set_mask(I915_WEDGED, &dev_priv->gpu_error.reset_counter);
		}
		mutex_unlock(&dev->struct_mutex);

		intel_runtime_pm_restore_interrupts(dev);

		intel_modeset_init_hw(dev);

		{
			unsigned long irqflags;
			spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
			if (dev_priv->display.hpd_irq_setup)
				dev_priv->display.hpd_irq_setup(dev);
			spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		}

		intel_dp_mst_resume(dev);
		drm_modeset_lock_all(dev);
		intel_modeset_setup_hw_state(dev, true);
		drm_modeset_unlock_all(dev);

		/*
		 * ... but also need to make sure that hotplug processing
		 * doesn't cause havoc. Like in the driver load code we don't
		 * bother with the tiny race here where we might loose hotplug
		 * notifications.
		 * */
		intel_hpd_init(dev);
		/* Config may have changed between suspend and resume */
		drm_helper_hpd_irq_event(dev);
	}

	intel_opregion_init(dev);

	/*
	 * The console lock can be pretty contented on resume due
	 * to all the printk activity.  Try to keep it out of the hot
	 * path of resume if possible.
	 */
	if (console_trylock()) {
		intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);
		console_unlock();
	} else {
		schedule_work(&dev_priv->console_resume_work);
	}

	mutex_lock(&dev_priv->modeset_restore_lock);
	dev_priv->modeset_restore = MODESET_DONE;
	mutex_unlock(&dev_priv->modeset_restore_lock);

	intel_opregion_notify_adapter(dev, PCI_D0);

	return 0;
}
Ejemplo n.º 10
0
/**
 * i915_reset - reset chip after a hang
 * @dev: drm device to reset
 *
 * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 * reset or otherwise an error code.
 *
 * Procedure is fairly simple:
 *   - reset the chip using the reset reg
 *   - re-init context state
 *   - re-init hardware status page
 *   - re-init ring buffer
 *   - re-init interrupt state
 *   - re-init display
 */
int i915_reset(struct drm_device *dev)
{
	drm_i915_private_t *dev_priv = dev->dev_private;
	int ret;

	if (!i915_try_reset)
		return 0;

	mutex_lock(&dev->struct_mutex);

	i915_gem_reset(dev);

	ret = -ENODEV;
	if (get_seconds() - dev_priv->gpu_error.last_reset < 5)
		DRM_ERROR("GPU hanging too fast, declaring wedged!\n");
	else
		ret = intel_gpu_reset(dev);

	dev_priv->gpu_error.last_reset = get_seconds();
	if (ret) {
		DRM_ERROR("Failed to reset chip.\n");
		mutex_unlock(&dev->struct_mutex);
		return ret;
	}

	/* Ok, now get things going again... */

	/*
	 * Everything depends on having the GTT running, so we need to start
	 * there.  Fortunately we don't need to do this unless we reset the
	 * chip at a PCI level.
	 *
	 * Next we need to restore the context, but we don't use those
	 * yet either...
	 *
	 * Ring buffer needs to be re-initialized in the KMS case, or if X
	 * was running at the time of the reset (i.e. we weren't VT
	 * switched away).
	 */
	if (drm_core_check_feature(dev, DRIVER_MODESET) ||
			!dev_priv->mm.suspended) {
		struct intel_ring_buffer *ring;
		int i;

		dev_priv->mm.suspended = 0;

		i915_gem_init_swizzling(dev);

		for_each_ring(ring, dev_priv, i)
			ring->init(ring);

		i915_gem_context_init(dev);
		i915_gem_init_ppgtt(dev);

		/*
		 * It would make sense to re-init all the other hw state, at
		 * least the rps/rc6/emon init done within modeset_init_hw. For
		 * some unknown reason, this blows up my ilk, so don't.
		 */

		mutex_unlock(&dev->struct_mutex);

		drm_irq_uninstall(dev);
		drm_irq_install(dev);
		intel_hpd_init(dev);
	} else {
		mutex_unlock(&dev->struct_mutex);
	}

	return 0;
}