linux-kernel - Re: [PATCH v2 2/3] drm/bridge: ti-sn65dsi86: Implement bridge->mode

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Date:   Thu, 23 Sep 2021 03:30:58 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Rob Clark <robdclark@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        Douglas Anderson <dianders@...omium.org>,
        Rob Clark <robdclark@...omium.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/3] drm/bridge: ti-sn65dsi86: Implement
 bridge->mode_valid()

Hi Rob,

Thank you for the patch.

On Mon, Sep 20, 2021 at 03:57:59PM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark@...omium.org>
> 
> For the brave new world of bridges not creating their own connectors, we
> need to implement the max clock limitation via bridge->mode_valid()
> instead of connector->mode_valid().
> 
> v2: Drop unneeded connector->mode_valid()
> 
> Signed-off-by: Rob Clark <robdclark@...omium.org>
> Reviewed-by: Douglas Anderson <dianders@...omium.org>

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> ---
>  drivers/gpu/drm/bridge/ti-sn65dsi86.c | 25 +++++++++++++------------
>  1 file changed, 13 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> index 41d48a393e7f..6154bed0af5b 100644
> --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> @@ -615,20 +615,8 @@ static int ti_sn_bridge_connector_get_modes(struct drm_connector *connector)
>  	return drm_bridge_get_modes(pdata->next_bridge, connector);
>  }
>  
> -static enum drm_mode_status
> -ti_sn_bridge_connector_mode_valid(struct drm_connector *connector,
> -				  struct drm_display_mode *mode)
> -{
> -	/* maximum supported resolution is 4K at 60 fps */
> -	if (mode->clock > 594000)
> -		return MODE_CLOCK_HIGH;
> -
> -	return MODE_OK;
> -}
> -
>  static struct drm_connector_helper_funcs ti_sn_bridge_connector_helper_funcs = {
>  	.get_modes = ti_sn_bridge_connector_get_modes,
> -	.mode_valid = ti_sn_bridge_connector_mode_valid,
>  };
>  
>  static const struct drm_connector_funcs ti_sn_bridge_connector_funcs = {
> @@ -766,6 +754,18 @@ static void ti_sn_bridge_detach(struct drm_bridge *bridge)
>  	drm_dp_aux_unregister(&bridge_to_ti_sn65dsi86(bridge)->aux);
>  }
>  
> +static enum drm_mode_status
> +ti_sn_bridge_mode_valid(struct drm_bridge *bridge,
> +			const struct drm_display_info *info,
> +			const struct drm_display_mode *mode)
> +{
> +	/* maximum supported resolution is 4K at 60 fps */
> +	if (mode->clock > 594000)
> +		return MODE_CLOCK_HIGH;
> +
> +	return MODE_OK;
> +}
> +
>  static void ti_sn_bridge_disable(struct drm_bridge *bridge)
>  {
>  	struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
> @@ -1127,6 +1127,7 @@ static void ti_sn_bridge_post_disable(struct drm_bridge *bridge)
>  static const struct drm_bridge_funcs ti_sn_bridge_funcs = {
>  	.attach = ti_sn_bridge_attach,
>  	.detach = ti_sn_bridge_detach,
> +	.mode_valid = ti_sn_bridge_mode_valid,
>  	.pre_enable = ti_sn_bridge_pre_enable,
>  	.enable = ti_sn_bridge_enable,
>  	.disable = ti_sn_bridge_disable,

-- 
Regards,

Laurent Pinchart