1 files changed, 99 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_vga.c b/drivers/gpu/drm/nouveau/nouveau_vga.c
new file mode 100644
index 000000000000..6f0ac64873df
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_vga.c
@@ -0,0 +1,99 @@
+#include <linux/vgaarb.h>
+#include <linux/vga_switcheroo.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "nouveau_drm.h"
+#include "nouveau_acpi.h"
+#include "nouveau_fbcon.h"
+#include "nouveau_vga.h"
+
+static unsigned int
+nouveau_vga_set_decode(void *priv, bool state)
+{
+        struct nouveau_device *device = nouveau_dev(priv);
+
+        if (device->chipset >= 0x40)
+                nv_wr32(device, 0x088054, state);
+        else
+                nv_wr32(device, 0x001854, state);
+
+        if (state)
+                return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
+                       VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
+        else
+                return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
+}
+
+static void
+nouveau_switcheroo_set_state(struct pci_dev *pdev,
+                             enum vga_switcheroo_state state)
+{
+        struct drm_device *dev = pci_get_drvdata(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_drm_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_switcheroo_optimus_dsm();
+                nouveau_drm_suspend(pdev, pmm);
+                dev->switch_power_state = DRM_SWITCH_POWER_OFF;
+        }
+}
+
+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);
+        bool can_switch;
+
+        spin_lock(&dev->count_lock);
+        can_switch = (dev->open_count == 0);
+        spin_unlock(&dev->count_lock);
+        return can_switch;
+}
+
+static const struct vga_switcheroo_client_ops
+nouveau_switcheroo_ops = {
+        .set_gpu_state = nouveau_switcheroo_set_state,
+        .reprobe = nouveau_switcheroo_reprobe,
+        .can_switch = nouveau_switcheroo_can_switch,
+};
+
+void
+nouveau_vga_init(struct nouveau_drm *drm)
+{
+        struct drm_device *dev = drm->dev;
+        vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
+        vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops);
+}
+
+void
+nouveau_vga_fini(struct nouveau_drm *drm)
+{
+        struct drm_device *dev = drm->dev;
+        vga_switcheroo_unregister_client(dev->pdev);
+        vga_client_register(dev->pdev, NULL, NULL, NULL);
+}
+
+
+void
+nouveau_vga_lastclose(struct drm_device *dev)
+{
+        vga_switcheroo_process_delayed_switch();
+}