We reuse most of the suspend/resume functions of the dGPU for nouveau
platform device. Only the power up/down sequences need to be handled
separately.
Signed-off-by: Vince Hsu <vinceh@xxxxxxxxxx>
---
drm/nouveau_platform.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 60 insertions(+)
diff --git a/drm/nouveau_platform.c b/drm/nouveau_platform.c
index 527fe2358fc9..51bfce59c498 100644
--- a/drm/nouveau_platform.c
+++ b/drm/nouveau_platform.c
@@ -211,6 +211,65 @@ static const struct of_device_id nouveau_platform_match[] = {
MODULE_DEVICE_TABLE(of, nouveau_platform_match);
#endif
+static int
+nouveau_platform_pmops_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct drm_device *drm_dev = platform_get_drvdata(pdev);
+ struct nouveau_drm *drm = nouveau_drm(drm_dev);
+ struct nouveau_device *device = nvkm_device(&drm->device);
+ struct nouveau_platform_gpu *gpu = nv_device_to_platform(device)->gpu;
+ int ret;
+
+ if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF ||
+ drm_dev->switch_power_state == DRM_SWITCH_POWER_DYNAMIC_OFF)
+ return 0;
+
+ ret = nouveau_do_suspend(drm_dev, false);
+ if (ret)
+ return ret;
+
+ ret = nouveau_platform_power_down(gpu);
+ if (ret) {
+ dev_err(dev, "failed to power down gpu (err:%d)\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int
+nouveau_platform_pmops_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct drm_device *drm_dev = platform_get_drvdata(pdev);
+ struct nouveau_drm *drm = nouveau_drm(drm_dev);
+ struct nouveau_device *device = nvkm_device(&drm->device);
+ struct nouveau_platform_gpu *gpu = nv_device_to_platform(device)->gpu;
+ int ret;
+
+ if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF ||
+ drm_dev->switch_power_state == DRM_SWITCH_POWER_DYNAMIC_OFF)
+ return 0;
+
+ ret = nouveau_platform_power_up(gpu);
+ if (ret) {
+ dev_err(dev, "failed to power up gpu\n");
+ return ret;
+ }
+
+ ret = nouveau_do_resume(drm_dev, false);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct dev_pm_ops nouveau_platform_pm_ops = {
+ .suspend = nouveau_platform_pmops_suspend,
+ .resume = nouveau_platform_pmops_resume,
+};
+
struct platform_driver nouveau_platform_driver = {
.driver = {
.name = "nouveau",
@@ -218,6 +277,7 @@ struct platform_driver nouveau_platform_driver = {
},
.probe = nouveau_platform_probe,
.remove = nouveau_platform_remove,
+ .driver.pm = &nouveau_platform_pm_ops,
};
module_platform_driver(nouveau_platform_driver);
--
1.9.1
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