linux-kernel - Re: [PATCH] drm/panel: jdi-fhd-r63452: make use of prepare_prev

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Date: Wed, 24 Apr 2024 08:51:17 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Barnabás Czémán <trabarni@...il.com>,
 Jessica Zhang <quic_jesszhan@...cinc.com>, Sam Ravnborg <sam@...nborg.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>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 y.oudjana@...tonmail.com
Subject: Re: [PATCH] drm/panel: jdi-fhd-r63452: make use of prepare_prev_first

On 23/04/2024 22:54, Barnabás Czémán wrote:
> The DSI host must be enabled for the panel to be initialized in
> prepare(). Set the prepare_prev_first flag to guarantee this.
> 
> Signed-off-by: Barnabás Czémán <trabarni@...il.com>
> ---
>   drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c b/drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c
> index 3e0a8e0d58a0..483dc88d16d8 100644
> --- a/drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c
> +++ b/drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c
> @@ -247,6 +247,7 @@ static int jdi_fhd_r63452_probe(struct mipi_dsi_device *dsi)
>   
>   	drm_panel_init(&ctx->panel, dev, &jdi_fhd_r63452_panel_funcs,
>   		       DRM_MODE_CONNECTOR_DSI);
> +	ctx->panel.prepare_prev_first = true;
>   
>   	ret = drm_panel_of_backlight(&ctx->panel);
>   	if (ret)
> 
> ---
> base-commit: a59668a9397e7245b26e9be85d23f242ff757ae8
> change-id: 20240423-jdi-fix-986a796a3101
> 
> Best regards,

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