1 files changed, 28 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index cd756262924d..edfc54e41842 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -897,6 +897,25 @@ static void radeon_check_arguments(struct radeon_device *rdev)
 }
 
 /**
+ * radeon_switcheroo_quirk_long_wakeup - return true if longer d3 delay is
+ * needed for waking up.
+ *
+ * @pdev: pci dev pointer
+ */
+static bool radeon_switcheroo_quirk_long_wakeup(struct pci_dev *pdev)
+{
+
+        /* 6600m in a macbook pro */
+        if (pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE &&
+            pdev->subsystem_device == 0x00e2) {
+                printk(KERN_INFO "radeon: quirking longer d3 wakeup delay\n");
+                return true;
+        }
+
+        return false;
+}
+
+/**
  * radeon_switcheroo_set_state - set switcheroo state
  *
  * @pdev: pci dev pointer
@@ -910,10 +929,19 @@ static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switchero
         struct drm_device *dev = pci_get_drvdata(pdev);
         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
         if (state == VGA_SWITCHEROO_ON) {
+                unsigned d3_delay = dev->pdev->d3_delay;
+
                 printk(KERN_INFO "radeon: switched on\n");
                 /* don't suspend or resume card normally */
                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
+
+                if (d3_delay < 20 && radeon_switcheroo_quirk_long_wakeup(pdev))
+                        dev->pdev->d3_delay = 20;
+
                 radeon_resume_kms(dev);
+
+                dev->pdev->d3_delay = d3_delay;
+
                 dev->switch_power_state = DRM_SWITCH_POWER_ON;
                 drm_kms_helper_poll_enable(dev);
         } else {