linux-kernel - Re: [PATCH 1/3] drm/panel: ilitek-ili9881c: make use of prepare_prev

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Message-ID: <b1fe97f3-4236-4efe-b156-762d5668eda4@linaro.org>
Date:   Tue, 5 Dec 2023 09:13:30 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Philipp Zabel <p.zabel@...gutronix.de>,
        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>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Marco Felsch <m.felsch@...gutronix.de>,
        kernel@...gutronix.de
Subject: Re: [PATCH 1/3] drm/panel: ilitek-ili9881c: make use of
 prepare_prev_first

On 23/11/2023 18:08, Philipp Zabel wrote:
> From: Marco Felsch <m.felsch@...gutronix.de>
> 
> The panel.prepare() call requires an initialized MIPI-DSI host, so set
> the prepare_prev_first flag to indicate that the host must be
> initialized first.
> 
> Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
> Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
> ---
>   drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> index 7838947a1bf3..0c911ed9141b 100644
> --- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> @@ -1094,6 +1094,8 @@ static int ili9881c_dsi_probe(struct mipi_dsi_device *dsi)
>   		return ret;
>   	}
>   
> +	ctx->panel.prepare_prev_first = true;
> +
>   	ret = drm_panel_of_backlight(&ctx->panel);
>   	if (ret)
>   		return ret;
> 

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