diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_vga.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_vga.c | 136 |
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(); +} |