linux-kernel - Re: [PATCH] drm: panel: boe-bf060y8m-aj0: Enable prepare_prev

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Message-ID: <ed6b10f5-f297-4839-a9fa-8c178792ab2d@linaro.org>
Date: Wed, 24 Jul 2024 09:53:13 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Dang Huynh <danct12@...eup.net>, Jessica Zhang
 <quic_jesszhan@...cinc.com>,
 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,
 phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
 Marijn Suijten <marijn.suijten@...ainline.org>
Subject: Re: [PATCH] drm: panel: boe-bf060y8m-aj0: Enable prepare_prev_first

On 22/07/2024 09:07, Dang Huynh wrote:
> Enable prepare_prev_first flag for BF060Y8M-AJ0 panel so that the
> previous controller should be prepared first before the prepare for
> the panel is called.
> 
> This makes sure that the previous controller, likely to be a DSI host
> controller should be initialized to LP-11 before the panel is powered up.
> 
> Suggested-by: Marijn Suijten <marijn.suijten@...ainline.org>
> Signed-off-by: Dang Huynh <danct12@...eup.net>
> ---
> This fixes display initialization on some platform/devices such as the
> Fxtec Pro1X.
> ---
>   drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c b/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c
> index e77db8597eb7..7e66db4a88bb 100644
> --- a/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c
> +++ b/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c
> @@ -377,6 +377,8 @@ static int boe_bf060y8m_aj0_probe(struct mipi_dsi_device *dsi)
>   	drm_panel_init(&boe->panel, dev, &boe_bf060y8m_aj0_panel_funcs,
>   		       DRM_MODE_CONNECTOR_DSI);
>   
> +	boe->panel.prepare_prev_first = true;
> +
>   	boe->panel.backlight = boe_bf060y8m_aj0_create_backlight(dsi);
>   	if (IS_ERR(boe->panel.backlight))
>   		return dev_err_probe(dev, PTR_ERR(boe->panel.backlight),
> 
> ---
> base-commit: 41c196e567fb1ea97f68a2ffb7faab451cd90854
> change-id: 20240722-bf060y8m-aj0-prepare-prev-2db87e7dd996
> 
> Best regards,

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