Re: [RFC PATCH v2 4/9] drm/panel: nv3052c: Wait before entering sleep mode

[Jessica Zhang]

On 9/18/2023 5:58 AM, John Watts wrote:
> The panel needs us to wait 120ms between exiting and entering sleep.
> Guarantee that by always waiting 150ms before entering sleep mode.

Hi John,

Same question as the last patch -- is this a fix for something?

Thanks,

Jessica Zhang

> Signed-off-by: John Watts <contact@xxxxxxxxxx>
> ---
>   drivers/gpu/drm/panel/panel-newvision-nv3052c.c | 3 +++
>   1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/panel/panel-newvision-nv3052c.c b/drivers/gpu/drm/panel/panel-newvision-nv3052c.c
> index 2526b123b1f5..307335d0f1fc 100644
> --- a/drivers/gpu/drm/panel/panel-newvision-nv3052c.c
> +++ b/drivers/gpu/drm/panel/panel-newvision-nv3052c.c
> @@ -289,6 +289,9 @@ static int nv3052c_unprepare(struct drm_panel *panel)
>   	struct mipi_dbi *dbi = &priv->dbi;
>   	int err;
>   
> +	/* Wait 150ms in case we just exited sleep mode */
> +	msleep(150);
> +
>   	err = mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE);
>   	if (err)
>   		dev_err(priv->dev, "Unable to enter sleep mode: %d\n", err);
> --
> 2.42.0