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path: root/drivers/gpu/drm/nouveau/nouveau_vga.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_vga.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_vga.c136
1 files changed, 136 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 000000000..60cd8c046
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_vga.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: MIT
+#include <linux/vgaarb.h>
+#include <linux/vga_switcheroo.h>
+
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+
+#include "nouveau_drv.h"
+#include "nouveau_acpi.h"
+#include "nouveau_fbcon.h"
+#include "nouveau_vga.h"
+
+static unsigned int
+nouveau_vga_set_decode(struct pci_dev *pdev, bool state)
+{
+ struct nouveau_drm *drm = nouveau_drm(pci_get_drvdata(pdev));
+ struct nvif_object *device = &drm->client.device.object;
+
+ if (drm->client.device.info.family == NV_DEVICE_INFO_V0_CURIE &&
+ drm->client.device.info.chipset >= 0x4c)
+ nvif_wr32(device, 0x088060, state);
+ else
+ if (drm->client.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) {
+ pr_err("VGA switcheroo: switched nouveau on\n");
+ dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
+ nouveau_pmops_resume(&pdev->dev);
+ dev->switch_power_state = DRM_SWITCH_POWER_ON;
+ } else {
+ pr_err("VGA switcheroo: switched nouveau off\n");
+ dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
+ 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);
+ drm_fb_helper_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 atomic_read(&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 = nouveau_pmops_runtime();
+ struct pci_dev *pdev;
+
+ /* only relevant for PCI devices */
+ if (!dev_is_pci(dev->dev))
+ return;
+ pdev = to_pci_dev(dev->dev);
+
+ vga_client_register(pdev, nouveau_vga_set_decode);
+
+ /* don't register Thunderbolt eGPU with vga_switcheroo */
+ if (pci_is_thunderbolt_attached(pdev))
+ return;
+
+ vga_switcheroo_register_client(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 = nouveau_pmops_runtime();
+ struct pci_dev *pdev;
+
+ /* only relevant for PCI devices */
+ if (!dev_is_pci(dev->dev))
+ return;
+ pdev = to_pci_dev(dev->dev);
+
+ vga_client_unregister(pdev);
+
+ if (pci_is_thunderbolt_attached(pdev))
+ return;
+
+ vga_switcheroo_unregister_client(pdev);
+ if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
+ vga_switcheroo_fini_domain_pm_ops(drm->dev->dev);
+}
+
+
+void
+nouveau_vga_lastclose(struct drm_device *dev)
+{
+ vga_switcheroo_process_delayed_switch();
+}