1 files changed, 95 insertions, 82 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 9c449b8d8eab..f8cfd16be534 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -67,11 +67,18 @@ bool __i915_inject_load_failure(const char *func, int line)
 	if (++i915_load_fail_count == i915_modparams.inject_load_failure) {
 		DRM_INFO("Injecting failure at checkpoint %u [%s:%d]\n",
 			 i915_modparams.inject_load_failure, func, line);
+		i915_modparams.inject_load_failure = 0;
 		return true;
 	}
 
 	return false;
 }
+
+bool i915_error_injected(void)
+{
+	return i915_load_fail_count && !i915_modparams.inject_load_failure;
+}
+
 #endif
 
 #define FDO_BUG_URL "https://bugs.freedesktop.org/enter_bug.cgi?product=DRI"
@@ -97,8 +104,13 @@ __i915_printk(struct drm_i915_private *dev_priv, const char *level,
 	vaf.fmt = fmt;
 	vaf.va = &args;
 
-	dev_printk(level, kdev, "[" DRM_NAME ":%ps] %pV",
-		   __builtin_return_address(0), &vaf);
+	if (is_error)
+		dev_printk(level, kdev, "%pV", &vaf);
+	else
+		dev_printk(level, kdev, "[" DRM_NAME ":%ps] %pV",
+			   __builtin_return_address(0), &vaf);
+
+	va_end(args);
 
 	if (is_error && !shown_bug_once) {
 		/*
@@ -110,25 +122,8 @@ __i915_printk(struct drm_i915_private *dev_priv, const char *level,
 			dev_notice(kdev, "%s", FDO_BUG_MSG);
 		shown_bug_once = true;
 	}
-
-	va_end(args);
-}
-
-static bool i915_error_injected(struct drm_i915_private *dev_priv)
-{
-#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
-	return i915_modparams.inject_load_failure &&
-	       i915_load_fail_count == i915_modparams.inject_load_failure;
-#else
-	return false;
-#endif
 }
 
-#define i915_load_error(dev_priv, fmt, ...)				     \
-	__i915_printk(dev_priv,						     \
-		      i915_error_injected(dev_priv) ? KERN_DEBUG : KERN_ERR, \
-		      fmt, ##__VA_ARGS__)
-
 /* Map PCH device id to PCH type, or PCH_NONE if unknown. */
 static enum intel_pch
 intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
@@ -233,6 +228,8 @@ intel_virt_detect_pch(const struct drm_i915_private *dev_priv)
 		id = INTEL_PCH_SPT_DEVICE_ID_TYPE;
 	else if (IS_COFFEELAKE(dev_priv) || IS_CANNONLAKE(dev_priv))
 		id = INTEL_PCH_CNP_DEVICE_ID_TYPE;
+	else if (IS_ICELAKE(dev_priv))
+		id = INTEL_PCH_ICP_DEVICE_ID_TYPE;
 
 	if (id)
 		DRM_DEBUG_KMS("Assuming PCH ID %04x\n", id);
@@ -246,14 +243,6 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv)
 {
 	struct pci_dev *pch = NULL;
 
-	/* In all current cases, num_pipes is equivalent to the PCH_NOP setting
-	 * (which really amounts to a PCH but no South Display).
-	 */
-	if (INTEL_INFO(dev_priv)->num_pipes == 0) {
-		dev_priv->pch_type = PCH_NOP;
-		return;
-	}
-
 	/*
 	 * The reason to probe ISA bridge instead of Dev31:Fun0 is to
 	 * make graphics device passthrough work easy for VMM, that only
@@ -282,18 +271,28 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv)
 		} else if (intel_is_virt_pch(id, pch->subsystem_vendor,
 					 pch->subsystem_device)) {
 			id = intel_virt_detect_pch(dev_priv);
-			if (id) {
-				pch_type = intel_pch_type(dev_priv, id);
-				if (WARN_ON(pch_type == PCH_NONE))
-					pch_type = PCH_NOP;
-			} else {
-				pch_type = PCH_NOP;
-			}
+			pch_type = intel_pch_type(dev_priv, id);
+
+			/* Sanity check virtual PCH id */
+			if (WARN_ON(id && pch_type == PCH_NONE))
+				id = 0;
+
 			dev_priv->pch_type = pch_type;
 			dev_priv->pch_id = id;
 			break;
 		}
 	}
+
+	/*
+	 * Use PCH_NOP (PCH but no South Display) for PCH platforms without
+	 * display.
+	 */
+	if (pch && INTEL_INFO(dev_priv)->num_pipes == 0) {
+		DRM_DEBUG_KMS("Display disabled, reverting to NOP PCH\n");
+		dev_priv->pch_type = PCH_NOP;
+		dev_priv->pch_id = 0;
+	}
+
 	if (!pch)
 		DRM_DEBUG_KMS("No PCH found.\n");
 
@@ -634,26 +633,6 @@ static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
 	.can_switch = i915_switcheroo_can_switch,
 };
 
-static void i915_gem_fini(struct drm_i915_private *dev_priv)
-{
-	/* Flush any outstanding unpin_work. */
-	i915_gem_drain_workqueue(dev_priv);
-
-	mutex_lock(&dev_priv->drm.struct_mutex);
-	intel_uc_fini_hw(dev_priv);
-	intel_uc_fini(dev_priv);
-	i915_gem_cleanup_engines(dev_priv);
-	i915_gem_contexts_fini(dev_priv);
-	mutex_unlock(&dev_priv->drm.struct_mutex);
-
-	intel_uc_fini_misc(dev_priv);
-	i915_gem_cleanup_userptr(dev_priv);
-
-	i915_gem_drain_freed_objects(dev_priv);
-
-	WARN_ON(!list_empty(&dev_priv->contexts.list));
-}
-
 static int i915_load_modeset_init(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = to_i915(dev);
@@ -703,7 +682,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
 
 	ret = i915_gem_init(dev_priv);
 	if (ret)
-		goto cleanup_irq;
+		goto cleanup_modeset;
 
 	intel_setup_overlay(dev_priv);
 
@@ -723,6 +702,8 @@ cleanup_gem:
 	if (i915_gem_suspend(dev_priv))
 		DRM_ERROR("failed to idle hardware; continuing to unload!\n");
 	i915_gem_fini(dev_priv);
+cleanup_modeset:
+	intel_modeset_cleanup(dev);
 cleanup_irq:
 	drm_irq_uninstall(dev);
 	intel_teardown_gmbus(dev_priv);
@@ -919,7 +900,6 @@ static int i915_driver_init_early(struct drm_i915_private *dev_priv,
 	spin_lock_init(&dev_priv->uncore.lock);
 
 	mutex_init(&dev_priv->sb_lock);
-	mutex_init(&dev_priv->modeset_restore_lock);
 	mutex_init(&dev_priv->av_mutex);
 	mutex_init(&dev_priv->wm.wm_mutex);
 	mutex_init(&dev_priv->pps_mutex);
@@ -1173,8 +1153,6 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
 
 	intel_uncore_sanitize(dev_priv);
 
-	intel_opregion_setup(dev_priv);
-
 	i915_gem_load_init_fences(dev_priv);
 
 	/* On the 945G/GM, the chipset reports the MSI capability on the
@@ -1189,6 +1167,12 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
 	 * get lost on g4x as well, and interrupt delivery seems to stay
 	 * properly dead afterwards. So we'll just disable them for all
 	 * pre-gen5 chipsets.
+	 *
+	 * dp aux and gmbus irq on gen4 seems to be able to generate legacy
+	 * interrupts even when in MSI mode. This results in spurious
+	 * interrupt warnings if the legacy irq no. is shared with another
+	 * device. The kernel then disables that interrupt source and so
+	 * prevents the other device from working properly.
 	 */
 	if (INTEL_GEN(dev_priv) >= 5) {
 		if (pci_enable_msi(pdev) < 0)
@@ -1197,10 +1181,16 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
 
 	ret = intel_gvt_init(dev_priv);
 	if (ret)
-		goto err_ggtt;
+		goto err_msi;
+
+	intel_opregion_setup(dev_priv);
 
 	return 0;
 
+err_msi:
+	if (pdev->msi_enabled)
+		pci_disable_msi(pdev);
+	pm_qos_remove_request(&dev_priv->pm_qos);
 err_ggtt:
 	i915_ggtt_cleanup_hw(dev_priv);
 err_perf:
@@ -1433,6 +1423,7 @@ out_fini:
 	drm_dev_fini(&dev_priv->drm);
 out_free:
 	kfree(dev_priv);
+	pci_set_drvdata(pdev, NULL);
 	return ret;
 }
 
@@ -1553,17 +1544,30 @@ static bool suspend_to_idle(struct drm_i915_private *dev_priv)
 	return false;
 }
 
+static int i915_drm_prepare(struct drm_device *dev)
+{
+	struct drm_i915_private *i915 = to_i915(dev);
+	int err;
+
+	/*
+	 * NB intel_display_suspend() may issue new requests after we've
+	 * ostensibly marked the GPU as ready-to-sleep here. We need to
+	 * split out that work and pull it forward so that after point,
+	 * the GPU is not woken again.
+	 */
+	err = i915_gem_suspend(i915);
+	if (err)
+		dev_err(&i915->drm.pdev->dev,
+			"GEM idle failed, suspend/resume might fail\n");
+
+	return err;
+}
+
 static int i915_drm_suspend(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct pci_dev *pdev = dev_priv->drm.pdev;
 	pci_power_t opregion_target_state;
-	int error;
-
-	/* ignore lid events during suspend */
-	mutex_lock(&dev_priv->modeset_restore_lock);
-	dev_priv->modeset_restore = MODESET_SUSPENDED;
-	mutex_unlock(&dev_priv->modeset_restore_lock);
 
 	disable_rpm_wakeref_asserts(dev_priv);
 
@@ -1575,16 +1579,9 @@ static int i915_drm_suspend(struct drm_device *dev)
 
 	pci_save_state(pdev);
 
-	error = i915_gem_suspend(dev_priv);
-	if (error) {
-		dev_err(&pdev->dev,
-			"GEM idle failed, resume might fail\n");
-		goto out;
-	}
-
 	intel_display_suspend(dev);
 
-	intel_dp_mst_suspend(dev);
+	intel_dp_mst_suspend(dev_priv);
 
 	intel_runtime_pm_disable_interrupts(dev_priv);
 	intel_hpd_cancel_work(dev_priv);
@@ -1600,7 +1597,6 @@ static int i915_drm_suspend(struct drm_device *dev)
 	opregion_target_state = suspend_to_idle(dev_priv) ? PCI_D1 : PCI_D3cold;
 	intel_opregion_notify_adapter(dev_priv, opregion_target_state);
 
-	intel_uncore_suspend(dev_priv);
 	intel_opregion_unregister(dev_priv);
 
 	intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED, true);
@@ -1609,10 +1605,9 @@ static int i915_drm_suspend(struct drm_device *dev)
 
 	intel_csr_ucode_suspend(dev_priv);
 
-out:
 	enable_rpm_wakeref_asserts(dev_priv);
 
-	return error;
+	return 0;
 }
 
 static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
@@ -1623,7 +1618,10 @@ static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
 
 	disable_rpm_wakeref_asserts(dev_priv);
 
+	i915_gem_suspend_late(dev_priv);
+
 	intel_display_set_init_power(dev_priv, false);
+	intel_uncore_suspend(dev_priv);
 
 	/*
 	 * In case of firmware assisted context save/restore don't manually
@@ -1710,6 +1708,8 @@ static int i915_drm_resume(struct drm_device *dev)
 	disable_rpm_wakeref_asserts(dev_priv);
 	intel_sanitize_gt_powersave(dev_priv);
 
+	i915_gem_sanitize(dev_priv);
+
 	ret = i915_ggtt_enable_hw(dev_priv);
 	if (ret)
 		DRM_ERROR("failed to re-enable GGTT\n");
@@ -1746,7 +1746,7 @@ static int i915_drm_resume(struct drm_device *dev)
 		dev_priv->display.hpd_irq_setup(dev_priv);
 	spin_unlock_irq(&dev_priv->irq_lock);
 
-	intel_dp_mst_resume(dev);
+	intel_dp_mst_resume(dev_priv);
 
 	intel_display_resume(dev);
 
@@ -1764,10 +1764,6 @@ static int i915_drm_resume(struct drm_device *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_priv, PCI_D0);
 
 	enable_rpm_wakeref_asserts(dev_priv);
@@ -1851,7 +1847,7 @@ static int i915_drm_resume_early(struct drm_device *dev)
 	else
 		intel_display_set_init_power(dev_priv, true);
 
-	i915_gem_sanitize(dev_priv);
+	intel_engines_sanitize(dev_priv);
 
 	enable_rpm_wakeref_asserts(dev_priv);
 
@@ -2081,6 +2077,22 @@ out:
 	return ret;
 }
 
+static int i915_pm_prepare(struct device *kdev)
+{
+	struct pci_dev *pdev = to_pci_dev(kdev);
+	struct drm_device *dev = pci_get_drvdata(pdev);
+
+	if (!dev) {
+		dev_err(kdev, "DRM not initialized, aborting suspend.\n");
+		return -ENODEV;
+	}
+
+	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+		return 0;
+
+	return i915_drm_prepare(dev);
+}
+
 static int i915_pm_suspend(struct device *kdev)
 {
 	struct pci_dev *pdev = to_pci_dev(kdev);
@@ -2731,6 +2743,7 @@ const struct dev_pm_ops i915_pm_ops = {
 	 * S0ix (via system suspend) and S3 event handlers [PMSG_SUSPEND,
 	 * PMSG_RESUME]
 	 */
+	.prepare = i915_pm_prepare,
 	.suspend = i915_pm_suspend,
 	.suspend_late = i915_pm_suspend_late,
 	.resume_early = i915_pm_resume_early,