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 <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
