vga_switcheroo: add reprobe hook for fbcon to recheck connected outputs.

This adds a hook after the mux is switched for the driver to reprobe
the connected outputs.

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

4 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 8cb7f93732c2..ec1f650f6fab 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1231,6 +1231,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
 
         ret = vga_switcheroo_register_client(dev->pdev,
                                              i915_switcheroo_set_state,
+                                             NULL,
                                              i915_switcheroo_can_switch);
         if (ret)
                 goto cleanup_vga_client;
diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index db4b410f4a8c..1b87eee22fa9 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -605,6 +605,12 @@ static void nouveau_switcheroo_set_state(struct pci_dev *pdev,
         }
 }
 
+static void nouveau_switcheroo_reprobe(struct pci_dev *pdev)
+{
+        struct drm_device *dev = pci_get_drvdata(pdev);
+        nouveau_fbcon_output_poll_changed(dev);
+}
+
 static bool nouveau_switcheroo_can_switch(struct pci_dev *pdev)
 {
         struct drm_device *dev = pci_get_drvdata(pdev);
@@ -625,6 +631,7 @@ nouveau_card_init(struct drm_device *dev)
 
         vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
         vga_switcheroo_register_client(dev->pdev, nouveau_switcheroo_set_state,
+                                       nouveau_switcheroo_reprobe,
                                        nouveau_switcheroo_can_switch);
 
         /* Initialise internal driver API hooks */
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 96f0eb484ce6..1a1017f0d9db 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -779,6 +779,7 @@ int radeon_device_init(struct radeon_device *rdev,
         vga_client_register(rdev->pdev, rdev, NULL, radeon_vga_set_decode);
         vga_switcheroo_register_client(rdev->pdev,
                                        radeon_switcheroo_set_state,
+                                       NULL,
                                        radeon_switcheroo_can_switch);
 
         r = radeon_init(rdev);
diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index 463691a1650e..2b8e1d25e8d0 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -33,6 +33,7 @@ struct vga_switcheroo_client {
         struct fb_info *fb_info;
         int pwr_state;
         void (*set_gpu_state)(struct pci_dev *pdev, enum vga_switcheroo_state);
+        void (*reprobe)(struct pci_dev *pdev);
         bool (*can_switch)(struct pci_dev *pdev);
         int id;
         bool active;
@@ -103,6 +104,7 @@ static void vga_switcheroo_enable(void)
 
 int vga_switcheroo_register_client(struct pci_dev *pdev,
                                    void (*set_gpu_state)(struct pci_dev *pdev, enum vga_switcheroo_state),
+                                   void (*reprobe)(struct pci_dev *pdev),
                                    bool (*can_switch)(struct pci_dev *pdev))
 {
         int index;
@@ -117,6 +119,7 @@ int vga_switcheroo_register_client(struct pci_dev *pdev,
         vgasr_priv.clients[index].pwr_state = VGA_SWITCHEROO_ON;
         vgasr_priv.clients[index].pdev = pdev;
         vgasr_priv.clients[index].set_gpu_state = set_gpu_state;
+        vgasr_priv.clients[index].reprobe = reprobe;
         vgasr_priv.clients[index].can_switch = can_switch;
         vgasr_priv.clients[index].id = -1;
         if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
@@ -251,6 +254,9 @@ static int vga_switchto(struct vga_switcheroo_client *new_client)
         if (ret)
                 return ret;
 
+        if (new_client->reprobe)
+                new_client->reprobe(new_client->pdev);
+
         if (active->pwr_state == VGA_SWITCHEROO_ON)
                 vga_switchoff(active);