From ab7959dd389be36c0bc63e3e883b7891d2c1bfc4 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Wed, 8 Sep 2010 09:45:11 +0100 Subject: [PATCH] drm/i915: Disable output polling across suspend & resume Suspending (especially hibernating) may take a finite amount of time, during which a hotplug event may trigger and we will attempt to handle it with inconsistent state. Disable hotplug polling around suspend and resume. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=30070 Reported-by: Rui Tiago Matos Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_dma.c | 2 -- drivers/gpu/drm/i915/i915_drv.c | 11 ++++++++++- 2 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index ce8ff0e..c569617 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1334,10 +1334,8 @@ static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_ /* i915 resume handler doesn't set to D0 */ pci_set_power_state(dev->pdev, PCI_D0); i915_resume(dev); - drm_kms_helper_poll_enable(dev); } else { printk(KERN_ERR "i915: switched off\n"); - drm_kms_helper_poll_disable(dev); i915_suspend(dev, pmm); } } diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 194e0c4..3ad3ebe 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -263,6 +263,8 @@ int i915_suspend(struct drm_device *dev, pm_message_t state) if (state.event == PM_EVENT_PRETHAW) return 0; + drm_kms_helper_poll_disable(dev); + error = i915_drm_freeze(dev); if (error) return error; @@ -306,12 +308,19 @@ static int i915_drm_thaw(struct drm_device *dev) int i915_resume(struct drm_device *dev) { + int ret; + if (pci_enable_device(dev->pdev)) return -EIO; pci_set_master(dev->pdev); - return i915_drm_thaw(dev); + ret = i915_drm_thaw(dev); + if (ret) + return ret; + + drm_kms_helper_poll_enable(dev); + return 0; } /** -- 1.7.2.3