linux-kernel - Re: [PATCH 5/8] drm: bridge: dw_hdmi: Invalidate CEC phys addr from connector detect

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Date: Mon, 24 Jun 2024 11:19:58 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Jonas Karlman <jonas@...boo.se>, Andrzej Hajda <andrzej.hajda@...el.com>,
 Robert Foss <rfoss@...nel.org>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
 Jernej Skrabec <jernej.skrabec@...il.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/8] drm: bridge: dw_hdmi: Invalidate CEC phys addr from
 connector detect

On 11/06/2024 17:50, Jonas Karlman wrote:
> Wait until the connector detect ops is called to invalidate CEC phys
> addr instead of doing it directly from the irq handler.
> 
> Signed-off-by: Jonas Karlman <jonas@...boo.se>
> ---
>   drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 18 +++++++++++-------
>   1 file changed, 11 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 9ecf038f551e..0814ca181f04 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -2455,7 +2455,17 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
>   {
>   	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
>   					     connector);
> -	return dw_hdmi_detect(hdmi);
> +	enum drm_connector_status status;
> +
> +	status = dw_hdmi_detect(hdmi);
> +
> +	if (status == connector_status_disconnected) {
> +		mutex_lock(&hdmi->cec_notifier_mutex);
> +		cec_notifier_phys_addr_invalidate(hdmi->cec_notifier);
> +		mutex_unlock(&hdmi->cec_notifier_mutex);
> +	}
> +
> +	return status;
>   }
>   
>   static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
> @@ -3066,12 +3076,6 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
>   				       phy_stat & HDMI_PHY_HPD,
>   				       phy_stat & HDMI_PHY_RX_SENSE);
>   
> -		if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0) {
> -			mutex_lock(&hdmi->cec_notifier_mutex);
> -			cec_notifier_phys_addr_invalidate(hdmi->cec_notifier);
> -			mutex_unlock(&hdmi->cec_notifier_mutex);
> -		}
> -
>   		if (phy_stat & HDMI_PHY_HPD)
>   			status = connector_status_connected;
>   

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