[PATCH] drm/stm: dw_mipi_dsi-stm: add sleep power management

[Philippe CORNU]

Dear Yannick,
Many thanks for your patch.

Acked-by: Philippe Cornu <philippe.cornu at st.com>

Philippe :-)


On 3/21/19 9:13 AM, Yannick Fertré wrote:
> Implements system sleep power management ops.
> 
> Signed-off-by: Yannick Fertré <yannick.fertre at st.com>
> ---
>   drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 28 ++++++++++++++++++++++++++++
>   1 file changed, 28 insertions(+)
> 
> diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> index a672b59..1bef73e 100644
> --- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> +++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> @@ -356,12 +356,40 @@ static int dw_mipi_dsi_stm_remove(struct platform_device *pdev)
>   	return 0;
>   }
>   
> +static int __maybe_unused dw_mipi_dsi_stm_suspend(struct device *dev)
> +{
> +	struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data;
> +
> +	DRM_DEBUG_DRIVER("\n");
> +
> +	clk_disable_unprepare(dsi->pllref_clk);
> +
> +	return 0;
> +}
> +
> +static int __maybe_unused dw_mipi_dsi_stm_resume(struct device *dev)
> +{
> +	struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data;
> +
> +	DRM_DEBUG_DRIVER("\n");
> +
> +	clk_prepare_enable(dsi->pllref_clk);
> +
> +	return 0;
> +}
> +
> +static const struct dev_pm_ops dw_mipi_dsi_stm_pm_ops = {
> +	SET_SYSTEM_SLEEP_PM_OPS(dw_mipi_dsi_stm_suspend,
> +				dw_mipi_dsi_stm_resume)
> +};
> +
>   static struct platform_driver dw_mipi_dsi_stm_driver = {
>   	.probe		= dw_mipi_dsi_stm_probe,
>   	.remove		= dw_mipi_dsi_stm_remove,
>   	.driver		= {
>   		.of_match_table = dw_mipi_dsi_stm_dt_ids,
>   		.name	= "stm32-display-dsi",
> +		.pm = &dw_mipi_dsi_stm_pm_ops,
>   	},
>   };
>   
>