Attachment 44991 Details for Bug 32396 – Disable outputs before KMS takeover

[patch] Disable outputs before KMS takeover

0001-drm-i915-Disable-all-outputs-early-before-KMS-takeov.patch (text/plain), 5.33 KB, created by Chris Wilson on 2011-03-29 03:44:54 UTC

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Creator: Chris Wilson

Created: 2011-03-29 03:44:54 UTC

Size: 5.33 KB

patch

obsolete

>From c0da03752479a984d5178a120e127b4d6ddf1092 Mon Sep 17 00:00:00 2001
>From: Chris Wilson <chris@chris-wilson.co.uk>
>Date: Tue, 29 Mar 2011 10:40:27 +0100
>Subject: [PATCH] drm/i915: Disable all outputs early, before KMS takeover
>
>If the outputs are active and continuing to access the GATT when we
>teardown the PTEs, then there is a potential for us to hang the GPU.
>The hang tends to be a PGTBL_ER with either an invalid host access or
>an invalid display plane fetch.
>
>Reported-by: Pekka Enberg <penberg@kernel.org>
>Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
>---
> drivers/gpu/drm/i915/i915_dma.c      |   31 ++++++++++++++++++++++---------
> drivers/gpu/drm/i915/i915_drv.h      |    1 +
> drivers/gpu/drm/i915/intel_display.c |   17 +++++++++++------
> 3 files changed, 34 insertions(+), 15 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
>index 7273037..65d5adf 100644
>--- a/drivers/gpu/drm/i915/i915_dma.c
>+++ b/drivers/gpu/drm/i915/i915_dma.c
>@@ -1176,11 +1176,11 @@ static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
> 	return can_switch;
> }
> 
>-static int i915_load_modeset_init(struct drm_device *dev)
>+static int i915_load_gem_init(struct drm_device *dev)
> {
> 	struct drm_i915_private *dev_priv = dev->dev_private;
> 	unsigned long prealloc_size, gtt_size, mappable_size;
>-	int ret = 0;
>+	int ret;
> 
> 	prealloc_size = dev_priv->mm.gtt->stolen_size;
> 	gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT;
>@@ -1204,7 +1204,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
> 	ret = i915_gem_init_ringbuffer(dev);
> 	mutex_unlock(&dev->struct_mutex);
> 	if (ret)
>-		goto out;
>+		return ret;
> 
> 	/* Try to set up FBC with a reasonable compressed buffer size */
> 	if (I915_HAS_FBC(dev) && i915_powersave) {
>@@ -1222,6 +1222,13 @@ static int i915_load_modeset_init(struct drm_device *dev)
> 
> 	/* Allow hardware batchbuffers unless told otherwise. */
> 	dev_priv->allow_batchbuffer = 1;
>+	return 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)
>@@ -1236,7 +1243,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
> 	 */
> 	ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
> 	if (ret && ret != -ENODEV)
>-		goto cleanup_ringbuffer;
>+		goto out;
> 
> 	intel_register_dsm_handler();
> 
>@@ -1257,13 +1264,19 @@ static int i915_load_modeset_init(struct drm_device *dev)
> 	if (ret)
> 		goto cleanup_vga_switcheroo;
> 
>+	ret = i915_load_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 = 1;
> 
> 	ret = intel_fbdev_init(dev);
> 	if (ret)
>-		goto cleanup_irq;
>+		goto cleanup_gem;
> 
> 	drm_kms_helper_poll_init(dev);
> 
>@@ -1272,16 +1285,16 @@ static int i915_load_modeset_init(struct drm_device *dev)
> 
> 	return 0;
> 
>+cleanup_gem:
>+	mutex_lock(&dev->struct_mutex);
>+	i915_gem_cleanup_ringbuffer(dev);
>+	mutex_unlock(&dev->struct_mutex);
> cleanup_irq:
> 	drm_irq_uninstall(dev);
> cleanup_vga_switcheroo:
> 	vga_switcheroo_unregister_client(dev->pdev);
> cleanup_vga_client:
> 	vga_client_register(dev->pdev, NULL, NULL, NULL);
>-cleanup_ringbuffer:
>-	mutex_lock(&dev->struct_mutex);
>-	i915_gem_cleanup_ringbuffer(dev);
>-	mutex_unlock(&dev->struct_mutex);
> out:
> 	return ret;
> }
>diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
>index 359ddce..60ebd79 100644
>--- a/drivers/gpu/drm/i915/i915_drv.h
>+++ b/drivers/gpu/drm/i915/i915_drv.h
>@@ -1268,6 +1268,7 @@ static inline void intel_unregister_dsm_handler(void) { return; }
> 
> /* modesetting */
> extern void intel_modeset_init(struct drm_device *dev);
>+extern void intel_modeset_gem_init(struct drm_device *dev);
> extern void intel_modeset_cleanup(struct drm_device *dev);
> extern int intel_modeset_vga_set_state(struct drm_device *dev, bool state);
> extern void i8xx_disable_fbc(struct drm_device *dev);
>diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
>index 432fc04..5c7385b 100644
>--- a/drivers/gpu/drm/i915/intel_display.c
>+++ b/drivers/gpu/drm/i915/intel_display.c
>@@ -6497,6 +6497,9 @@ static void intel_setup_outputs(struct drm_device *dev)
> 	}
> 
> 	intel_panel_setup_backlight(dev);
>+
>+	/* disable all the possible outputs/crtcs before entering KMS mode */
>+	drm_helper_disable_unused_functions(dev);
> }
> 
> static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
>@@ -7432,13 +7435,12 @@ void intel_modeset_init(struct drm_device *dev)
> 		intel_crtc_init(dev, i);
> 	}
> 
>+	/* Just disable it once at startup */
>+	i915_disable_vga(dev);
> 	intel_setup_outputs(dev);
> 
> 	intel_enable_clock_gating(dev);
> 
>-	/* Just disable it once at startup */
>-	i915_disable_vga(dev);
>-
> 	if (IS_IRONLAKE_M(dev)) {
> 		ironlake_enable_drps(dev);
> 		intel_init_emon(dev);
>@@ -7447,12 +7449,15 @@ void intel_modeset_init(struct drm_device *dev)
> 	if (IS_GEN6(dev))
> 		gen6_enable_rps(dev_priv);
> 
>-	if (IS_IRONLAKE_M(dev))
>-		ironlake_enable_rc6(dev);
>-
> 	INIT_WORK(&dev_priv->idle_work, intel_idle_update);
> 	setup_timer(&dev_priv->idle_timer, intel_gpu_idle_timer,
> 		    (unsigned long)dev);
>+}
>+
>+void intel_modeset_gem_init(struct drm_device *dev)
>+{
>+	if (IS_IRONLAKE_M(dev))
>+		ironlake_enable_rc6(dev);
> 
> 	intel_setup_overlay(dev);
> }
>-- 
>1.7.4.1
>

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