[PATCH] drm/bridge: tfp410: add pclk limits

[Andrzej Hajda]

On 13.01.2020 14:45, Tomi Valkeinen wrote:
> Add pixel clock limits to the driver as per TFP410 datasheet: min 25MHz,
> max 165MHz.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
Reviewed-by: Andrzej Hajda <a.hajda at samsung.com>

 --
Regards
Andrzej

> ---
>  drivers/gpu/drm/bridge/ti-tfp410.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
> index 6f6d6d1e60ae..f378a8f79bcb 100644
> --- a/drivers/gpu/drm/bridge/ti-tfp410.c
> +++ b/drivers/gpu/drm/bridge/ti-tfp410.c
> @@ -167,10 +167,20 @@ static void tfp410_disable(struct drm_bridge *bridge)
>  	gpiod_set_value_cansleep(dvi->powerdown, 1);
>  }
>  
> +static enum drm_mode_status tfp410_mode_valid(struct drm_bridge *bridge,
> +					      const struct drm_display_mode *mode)
> +{
> +	if (mode->clock < 25000 || mode->clock > 165000)
> +		return MODE_BAD;
> +
> +	return MODE_OK;
> +}
> +
>  static const struct drm_bridge_funcs tfp410_bridge_funcs = {
>  	.attach		= tfp410_attach,
>  	.enable		= tfp410_enable,
>  	.disable	= tfp410_disable,
> +	.mode_valid	= tfp410_mode_valid,
>  };
>  
>  static void tfp410_hpd_work_func(struct work_struct *work)