On 06.08.2018 21:31, Leonard Crestez wrote:
> Since power to the lcdif block can be lost on suspend implement
> PM_SLEEP_OPS using drm_mode_config_helper_suspend/resume to save/restore
> the current mode.
>
> Signed-off-by: Leonard Crestez <leonard.crestez@xxxxxxx>
Reviewed-by: Stefan Agner <stefan@xxxxxxxx>
> ---
> drivers/gpu/drm/mxsfb/mxsfb_drv.c | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c
> b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
> index 68d79f5dc0d3..d797dfd40d98 100644
> --- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c
> +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
> @@ -416,17 +416,38 @@ static int mxsfb_remove(struct platform_device *pdev)
> drm_dev_unref(drm);
>
> return 0;
> }
>
> +#ifdef CONFIG_PM_SLEEP
> +static int mxsfb_suspend(struct device *dev)
> +{
> + struct drm_device *drm = dev_get_drvdata(dev);
> +
> + return drm_mode_config_helper_suspend(drm);
> +}
> +
> +static int mxsfb_resume(struct device *dev)
> +{
> + struct drm_device *drm = dev_get_drvdata(dev);
> +
> + return drm_mode_config_helper_resume(drm);
> +}
> +#endif
> +
> +static const struct dev_pm_ops mxsfb_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume)
> +};
> +
> static struct platform_driver mxsfb_platform_driver = {
> .probe = mxsfb_probe,
> .remove = mxsfb_remove,
> .id_table = mxsfb_devtype,
> .driver = {
> .name = "mxsfb",
> .of_match_table = mxsfb_dt_ids,
> + .pm = &mxsfb_pm_ops,
> },
> };
>
> module_platform_driver(mxsfb_platform_driver);
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