linux-kernel - Re: [PATCH 2/7] drm/bridge: analogix_dp: drop unused argument to analogix_dp_prepare

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Message-ID: <d4d6d1a2-cfec-4913-a30e-26cf63a17fa2@rock-chips.com>
Date: Mon, 14 Apr 2025 09:38:14 +0800
From: Damon Ding <damon.ding@...k-chips.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Laurent.pinchart@...asonboard.com, airlied@...il.com,
 andrzej.hajda@...el.com, dri-devel@...ts.freedesktop.org,
 jernej.skrabec@...il.com, jonas@...boo.se, linux-kernel@...r.kernel.org,
 maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
 neil.armstrong@...aro.org, quic_jesszhan@...cinc.com, rfoss@...nel.org,
 simona@...ll.ch, tzimmermann@...e.de
Subject: Re: [PATCH 2/7] drm/bridge: analogix_dp: drop unused argument to
 analogix_dp_prepare_panel()

Hi Dmitry,

On 2025/4/1 13:11, Dmitry Baryshkov wrote:
> After previous cleanup all calling sites pass true as is_modeset_prepare
> argument to analogix_dp_prepare_panel(). Drop dead code depending on
> that argument being false.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> ---
>   drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 19 +++++--------------
>   1 file changed, 5 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index ab1cfc340aa95bbf13fe021bd33227b565a5458d..82dc4b01806f9728dc882b0128171838e81f21b0 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -963,13 +963,13 @@ static int analogix_dp_disable_psr(struct analogix_dp_device *dp)
>    * If @prepare is true, this function will prepare the panel. Conversely, if it
>    * is false, the panel will be unprepared.
>    *
> - * If @is_modeset_prepare is true, the function will disregard the current state
> + * The function will disregard the current state
>    * of the panel and either prepare/unprepare the panel based on @prepare. Once
>    * it finishes, it will update dp->panel_is_modeset to reflect the current state
>    * of the panel.
>    */
>   static int analogix_dp_prepare_panel(struct analogix_dp_device *dp,
> -				     bool prepare, bool is_modeset_prepare)
> +				     bool prepare)
>   {
>   	int ret = 0;
>   
> @@ -978,13 +978,6 @@ static int analogix_dp_prepare_panel(struct analogix_dp_device *dp,
>   
>   	mutex_lock(&dp->panel_lock);
>   
> -	/*
> -	 * Exit early if this is a temporary prepare/unprepare and we're already
> -	 * modeset (since we neither want to prepare twice or unprepare early).
> -	 */
> -	if (dp->panel_is_modeset && !is_modeset_prepare)
> -		goto out;
> -
>   	if (prepare)
>   		ret = drm_panel_prepare(dp->plat_data->panel);
>   	else
> @@ -993,8 +986,7 @@ static int analogix_dp_prepare_panel(struct analogix_dp_device *dp,
>   	if (ret)
>   		goto out;
>   
> -	if (is_modeset_prepare)
> -		dp->panel_is_modeset = prepare;
> +	dp->panel_is_modeset = prepare;
>   
>   out:
>   	mutex_unlock(&dp->panel_lock);
> @@ -1072,7 +1064,6 @@ analogix_dp_detect(struct drm_connector *connector, bool force)
>   {
>   	struct analogix_dp_device *dp = to_dp(connector);
>   	enum drm_connector_status status = connector_status_disconnected;
> -	int ret;
>   
>   	if (dp->plat_data->panel)
>   		return connector_status_connected;
> @@ -1194,7 +1185,7 @@ static void analogix_dp_bridge_atomic_pre_enable(struct drm_bridge *bridge,
>   	if (old_crtc_state && old_crtc_state->self_refresh_active)
>   		return;
>   
> -	ret = analogix_dp_prepare_panel(dp, true, true);
> +	ret = analogix_dp_prepare_panel(dp, true);
>   	if (ret)
>   		DRM_ERROR("failed to setup the panel ret = %d\n", ret);
>   }
> @@ -1294,7 +1285,7 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
>   
>   	pm_runtime_put_sync(dp->dev);
>   
> -	ret = analogix_dp_prepare_panel(dp, false, true);
> +	ret = analogix_dp_prepare_panel(dp, false);
>   	if (ret)
>   		DRM_ERROR("failed to setup the panel ret = %d\n", ret);
>   
> 

The patch has been verified with the eDP panel "lg,lp079qx1-sp0v" in 
RK3588S EVB1 board.

Tested-by: Damon Ding <damon.ding@...k-chips.com>

Best regards,
Damon