lkml.org 
[lkml]   [2014]   [Dec]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH nouveau 10/11] platform: add suspend/resume support
    Date
    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@nvidia.com>
    ---
    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


    \
     
     \ /
      Last update: 2014-12-23 12:21    [W:4.110 / U:0.012 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site