drm/switcheroo: track state of switch in drivers.
Dave Airlie [Mon, 6 Dec 2010 23:20:40 +0000 (09:20 +1000)]
We need to track the state of the switch in drivers, so that after s/r
we don't resume the card we've explicitly switched off before. Also
don't allow a userspace open to occur if we've switched the gpu off.

Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_fops.c
drivers/gpu/drm/i915/i915_dma.c
drivers/gpu/drm/i915/i915_drv.c
drivers/gpu/drm/nouveau/nouveau_drv.c
drivers/gpu/drm/nouveau/nouveau_drv.h
drivers/gpu/drm/nouveau/nouveau_state.c
drivers/gpu/drm/radeon/radeon.h
drivers/gpu/drm/radeon/radeon_device.c
drivers/gpu/drm/radeon/radeon_kms.c
include/drm/drmP.h

index a39794b..2ec7d48 100644 (file)
@@ -236,6 +236,8 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
                return -EBUSY;  /* No exclusive opens */
        if (!drm_cpu_valid())
                return -EINVAL;
+       if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
+               return -EINVAL;
 
        DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id);
 
index ec1f650..0568dbd 100644 (file)
@@ -1151,12 +1151,16 @@ static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_
        pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
        if (state == VGA_SWITCHEROO_ON) {
                printk(KERN_INFO "i915: switched on\n");
+               dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                /* i915 resume handler doesn't set to D0 */
                pci_set_power_state(dev->pdev, PCI_D0);
                i915_resume(dev);
+               dev->switch_power_state = DRM_SWITCH_POWER_ON;
        } else {
                printk(KERN_ERR "i915: switched off\n");
+               dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                i915_suspend(dev, pmm);
+               dev->switch_power_state = DRM_SWITCH_POWER_OFF;
        }
 }
 
index 9eee6cf..8724933 100644 (file)
@@ -271,6 +271,8 @@ static int i915_drm_freeze(struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
 
+       drm_kms_helper_poll_disable(dev);
+
        pci_save_state(dev->pdev);
 
        /* If KMS is active, we do the leavevt stuff here */
@@ -307,7 +309,9 @@ 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);
+
+       if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+               return 0;
 
        error = i915_drm_freeze(dev);
        if (error)
@@ -361,6 +365,9 @@ int i915_resume(struct drm_device *dev)
 {
        int ret;
 
+       if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+               return 0;
+
        if (pci_enable_device(dev->pdev))
                return -EIO;
 
@@ -569,6 +576,9 @@ static int i915_pm_suspend(struct device *dev)
                return -ENODEV;
        }
 
+       if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+               return 0;
+
        error = i915_drm_freeze(drm_dev);
        if (error)
                return error;
index bb17057..13bb672 100644 (file)
@@ -171,6 +171,9 @@ nouveau_pci_suspend(struct pci_dev *pdev, pm_message_t pm_state)
        if (pm_state.event == PM_EVENT_PRETHAW)
                return 0;
 
+       if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+               return 0;
+
        NV_INFO(dev, "Disabling fbcon acceleration...\n");
        nouveau_fbcon_save_disable_accel(dev);
 
@@ -254,6 +257,9 @@ nouveau_pci_resume(struct pci_dev *pdev)
        struct drm_crtc *crtc;
        int ret, i;
 
+       if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+               return 0;
+
        nouveau_fbcon_save_disable_accel(dev);
 
        NV_INFO(dev, "We're back, enabling device...\n");
index e815756..e59f5bc 100644 (file)
@@ -753,6 +753,8 @@ struct drm_nouveau_private {
 
        struct nouveau_fbdev *nfbdev;
        struct apertures_struct *apertures;
+
+       bool powered_down;
 };
 
 static inline struct drm_nouveau_private *
index 1b87eee..a54fc43 100644 (file)
@@ -596,12 +596,16 @@ static void nouveau_switcheroo_set_state(struct pci_dev *pdev,
        pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
        if (state == VGA_SWITCHEROO_ON) {
                printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
+               dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                nouveau_pci_resume(pdev);
                drm_kms_helper_poll_enable(dev);
+               dev->switch_power_state = DRM_SWITCH_POWER_ON;
        } else {
                printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
+               dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                drm_kms_helper_poll_disable(dev);
                nouveau_pci_suspend(pdev, pmm);
+               dev->switch_power_state = DRM_SWITCH_POWER_OFF;
        }
 }
 
index d2697f8..140eace 100644 (file)
@@ -1167,7 +1167,6 @@ struct radeon_device {
        uint8_t                 audio_status_bits;
        uint8_t                 audio_category_code;
 
-       bool powered_down;
        struct notifier_block acpi_nb;
        /* only one userspace can use Hyperz features at a time */
        struct drm_file *hyperz_filp;
index 1a1017f..4ee0c53 100644 (file)
@@ -642,20 +642,20 @@ void radeon_check_arguments(struct radeon_device *rdev)
 static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
 {
        struct drm_device *dev = pci_get_drvdata(pdev);
-       struct radeon_device *rdev = dev->dev_private;
        pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
        if (state == VGA_SWITCHEROO_ON) {
                printk(KERN_INFO "radeon: switched on\n");
                /* don't suspend or resume card normally */
-               rdev->powered_down = false;
+               dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                radeon_resume_kms(dev);
+               dev->switch_power_state = DRM_SWITCH_POWER_ON;
                drm_kms_helper_poll_enable(dev);
        } else {
                printk(KERN_INFO "radeon: switched off\n");
                drm_kms_helper_poll_disable(dev);
+               dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                radeon_suspend_kms(dev, pmm);
-               /* don't suspend or resume card normally */
-               rdev->powered_down = true;
+               dev->switch_power_state = DRM_SWITCH_POWER_OFF;
        }
 }
 
@@ -842,7 +842,7 @@ int radeon_suspend_kms(struct drm_device *dev, pm_message_t state)
        }
        rdev = dev->dev_private;
 
-       if (rdev->powered_down)
+       if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
                return 0;
 
        /* turn off display hw */
@@ -900,7 +900,7 @@ int radeon_resume_kms(struct drm_device *dev)
        struct drm_connector *connector;
        struct radeon_device *rdev = dev->dev_private;
 
-       if (rdev->powered_down)
+       if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
                return 0;
 
        acquire_console_sem();
index 4bf423c..b268633 100644 (file)
@@ -203,10 +203,6 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
  */
 int radeon_driver_firstopen_kms(struct drm_device *dev)
 {
-       struct radeon_device *rdev = dev->dev_private;
-
-       if (rdev->powered_down)
-               return -EINVAL;
        return 0;
 }
 
index 0f14f94..a4694c6 100644 (file)
@@ -1121,9 +1121,13 @@ struct drm_device {
        spinlock_t object_name_lock;
        struct idr object_name_idr;
        /*@} */
-
+       int switch_power_state;
 };
 
+#define DRM_SWITCH_POWER_ON 0
+#define DRM_SWITCH_POWER_OFF 1
+#define DRM_SWITCH_POWER_CHANGING 2
+
 static __inline__ int drm_core_check_feature(struct drm_device *dev,
                                             int feature)
 {