linux-kernel - Re: [PATCH 5/7] drm/bridge: analogix_dp: inline analogix_dp_prepare

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Message-ID: <61f0bdc4-1262-4d8e-a358-7f6da94d8a61@rock-chips.com>
Date: Mon, 14 Apr 2025 09:54:35 +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 5/7] drm/bridge: analogix_dp: inline
 analogix_dp_prepare_panel()

Hi Dmitry,

On 2025/4/1 13:11, Dmitry Baryshkov wrote:
> The analogix_dp_prepare_panel() is now only calling a corresponding
> drm_panel function. Inline it to simplify the code.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> ---
>   drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 43 +++++-----------------
>   1 file changed, 10 insertions(+), 33 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index 1ec4d277fe6bb03ad9eb8451ae2af5ad5ada0978..f60068011008482f7b7b2edfcab5fb1b3e9e130f 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -955,33 +955,6 @@ static int analogix_dp_disable_psr(struct analogix_dp_device *dp)
>   	return analogix_dp_send_psr_spd(dp, &psr_vsc, true);
>   }
>   
> -/*
> - * This function is a bit of a catch-all for panel preparation, hopefully
> - * simplifying the logic of functions that need to prepare/unprepare the panel
> - * below.
> - *
> - * If @prepare is true, this function will prepare the panel. Conversely, if it
> - * is false, the panel will be unprepared.
> - *
> - * The function will disregard the current state
> - * of the panel and either prepare/unprepare the panel based on @prepare.
> - */
> -static int analogix_dp_prepare_panel(struct analogix_dp_device *dp,
> -				     bool prepare)
> -{
> -	int ret = 0;
> -
> -	if (!dp->plat_data->panel)
> -		return 0;
> -
> -	if (prepare)
> -		ret = drm_panel_prepare(dp->plat_data->panel);
> -	else
> -		ret = drm_panel_unprepare(dp->plat_data->panel);
> -
> -	return ret;
> -}
> -
>   static int analogix_dp_get_modes(struct drm_connector *connector)
>   {
>   	struct analogix_dp_device *dp = to_dp(connector);
> @@ -1174,9 +1147,11 @@ 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);
> -	if (ret)
> -		DRM_ERROR("failed to setup the panel ret = %d\n", ret);
> +	if (dp->plat_data->panel) {
> +		ret = drm_panel_prepare(dp->plat_data->panel);
> +		if (ret)
> +			DRM_ERROR("failed to prepare the panel ret = %d\n", ret);
> +	}
>   }
>   
>   static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
> @@ -1274,9 +1249,11 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
>   
>   	pm_runtime_put_sync(dp->dev);
>   
> -	ret = analogix_dp_prepare_panel(dp, false);
> -	if (ret)
> -		DRM_ERROR("failed to setup the panel ret = %d\n", ret);
> +	if (dp->plat_data->panel) {
> +		ret = drm_panel_unprepare(dp->plat_data->panel);
> +		if (ret)
> +			DRM_ERROR("failed to unprepare the panel ret = %d\n", ret);
> +	}
>   
>   	dp->fast_train_enable = false;
>   	dp->psr_supported = false;
> 

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