linux-kernel - Re: [PATCH v3 2/3] drm/bridge: tfp410: Fix logic to configured polled HPD

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Message-ID: <4a22e085-b339-aa43-518e-d528c5f76de4@linaro.org>
Date:   Fri, 31 Mar 2023 11:00:32 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Jonathan Cormier <jcormier@...ticallink.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Michael Williamson <michael.williamson@...ticallink.com>,
        Bob Duke <bduke@...ticallink.com>
Subject: Re: [PATCH v3 2/3] drm/bridge: tfp410: Fix logic to configured polled
 HPD

Hi,

On 20/02/2023 23:10, Jonathan Cormier wrote:
> From: Michael Williamson <michael.williamson@...ticallink.com>
> 
> The logic to configure polling (vs async/irq notification) of hot-plug
> events was not correct.  If the connected bridge requires polling,
> then inform the upstream bridge we also require polling.
> 
> Signed-off-by: Michael Williamson <michael.williamson@...ticallink.com>
> Signed-off-by: Jonathan Cormier <jcormier@...ticallink.com>
> ---
>   drivers/gpu/drm/bridge/ti-tfp410.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
> index bb3f8d0ff207..41007d05d584 100644
> --- a/drivers/gpu/drm/bridge/ti-tfp410.c
> +++ b/drivers/gpu/drm/bridge/ti-tfp410.c
> @@ -155,7 +155,7 @@ static int tfp410_attach(struct drm_bridge *bridge,
>   		return -ENODEV;
>   	}
>   
> -	if (dvi->next_bridge->ops & DRM_BRIDGE_OP_DETECT)
> +	if (dvi->next_bridge->ops & DRM_BRIDGE_OP_HPD)
>   		dvi->connector.polled = DRM_CONNECTOR_POLL_HPD;
>   	else
>   		dvi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
> 

A Fixes tag is probably needed here ?

With that:
Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>