Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / nouveau / nouveau_vga.c

diff --git a/kernel/drivers/gpu/drm/nouveau/nouveau_vga.c b/kernel/drivers/gpu/drm/nouveau/nouveau_vga.c
new file mode 100644 (file)
index 0000000..c7592ec
--- /dev/null
+++ b/kernel/drivers/gpu/drm/nouveau/nouveau_vga.c
@@ -0,0 +1,129 @@
+#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 nvif_device *device = &nouveau_drm(priv)->device;
+
+       if (device->info.family == NV_DEVICE_INFO_V0_CURIE &&
+           device->info.chipset >= 0x4c)
+               nvif_wr32(device, 0x088060, state);
+       else
+       if (device->info.chipset >= 0x40)
+               nvif_wr32(device, 0x088054, state);
+       else
+               nvif_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);
+
+       if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF)
+               return;
+
+       if (state == VGA_SWITCHEROO_ON) {
+               printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
+               dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
+               nouveau_pmops_resume(&pdev->dev);
+               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_pmops_suspend(&pdev->dev);
+               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);
+
+       /*
+        * FIXME: open_count is protected by drm_global_mutex but that would lead to
+        * locking inversion with the driver load path. And the access here is
+        * completely racy anyway. So don't bother with locking for now.
+        */
+       return dev->open_count == 0;
+}
+
+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;
+       bool runtime = false;
+
+       /* only relevant for PCI devices */
+       if (!dev->pdev)
+               return;
+
+       vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
+
+       if (nouveau_runtime_pm == 1)
+               runtime = true;
+       if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
+               runtime = true;
+       vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime);
+
+       if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
+               vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
+}
+
+void
+nouveau_vga_fini(struct nouveau_drm *drm)
+{
+       struct drm_device *dev = drm->dev;
+       bool runtime = false;
+
+       if (nouveau_runtime_pm == 1)
+               runtime = true;
+       if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
+               runtime = true;
+
+       vga_switcheroo_unregister_client(dev->pdev);
+       if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
+               vga_switcheroo_fini_domain_pm_ops(drm->dev->dev);
+       vga_client_register(dev->pdev, NULL, NULL, NULL);
+}
+
+
+void
+nouveau_vga_lastclose(struct drm_device *dev)
+{
+       vga_switcheroo_process_delayed_switch();
+}