linux-kernel - Re: [PATCH v2] drm/gma500: replace drm_detect_hdmi_monitor() with drm_display_info.is

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Message-ID: <b0f77fcc-5d84-4727-9a17-9d1f1e2c5b76@suse.de>
Date: Thu, 12 Sep 2024 09:19:36 +0200
From: Thomas Zimmermann <tzimmermann@...e.de>
To: Tejas Vipin <tejasvipin76@...il.com>, Laurent.pinchart@...asonboard.com,
 patrik.r.jakobsson@...il.com, maarten.lankhorst@...ux.intel.com,
 mripard@...nel.org, airlied@...il.com, daniel@...ll.ch
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] drm/gma500: replace drm_detect_hdmi_monitor() with
 drm_display_info.is_hdmi

Hi

Am 11.09.24 um 20:06 schrieb Tejas Vipin:
> Replace drm_detect_hdmi_monitor() with drm_display_info.is_hdmi since
> monitor HDMI information is available after EDID is parsed. Additionally
> rewrite the code the code to have fewer indentation levels.

The problem is that the entire logic is outdated. The content 
of cdv_hdmi_detect() should go into cdv_hdmi_get_modes(), the detect_ctx 
callback should be set to drm_connector_helper_detect_from_ddc() and 
cdv_hdmi_detect() should be deleted. The result is that ->detect_ctx 
will detect the presence of a display and ->get_modes will update EDID 
and other properties.

Do you have  a device for testing such a change?

Best regards
Thomas

>
> Signed-off-by: Tejas Vipin <tejasvipin76@...il.com>
> ---
> Changes in v2:
>      - Use drm_edid instead of edid
>
> Link to v1: https://lore.kernel.org/all/20240910051856.700210-1-tejasvipin76@gmail.com/
> ---
>   drivers/gpu/drm/gma500/cdv_intel_hdmi.c | 24 +++++++++++++-----------
>   1 file changed, 13 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/gma500/cdv_intel_hdmi.c b/drivers/gpu/drm/gma500/cdv_intel_hdmi.c
> index 2d95e0471291..701f8bbd5f2b 100644
> --- a/drivers/gpu/drm/gma500/cdv_intel_hdmi.c
> +++ b/drivers/gpu/drm/gma500/cdv_intel_hdmi.c
> @@ -128,23 +128,25 @@ static enum drm_connector_status cdv_hdmi_detect(
>   {
>   	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
>   	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
> -	struct edid *edid = NULL;
> +	const struct drm_edid *drm_edid;
> +	int ret;
>   	enum drm_connector_status status = connector_status_disconnected;
>   
> -	edid = drm_get_edid(connector, connector->ddc);
> +	drm_edid = drm_edid_read_ddc(connector, connector->ddc);
> +	ret = drm_edid_connector_update(connector, drm_edid);
>   
>   	hdmi_priv->has_hdmi_sink = false;
>   	hdmi_priv->has_hdmi_audio = false;
> -	if (edid) {
> -		if (edid->input & DRM_EDID_INPUT_DIGITAL) {
> -			status = connector_status_connected;
> -			hdmi_priv->has_hdmi_sink =
> -						drm_detect_hdmi_monitor(edid);
> -			hdmi_priv->has_hdmi_audio =
> -						drm_detect_monitor_audio(edid);
> -		}
> -		kfree(edid);
> +	if (ret)
> +		return status;
> +
> +	if (drm_edid_is_digital(drm_edid)) {
> +		status = connector_status_connected;
> +		hdmi_priv->has_hdmi_sink = connector->display_info.is_hdmi;
> +		hdmi_priv->has_hdmi_audio = connector->display_info.has_audio;
>   	}
> +	drm_edid_free(drm_edid);
> +
>   	return status;
>   }
>   

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)