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

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Message-Id: <20231123-drm-panel-ili9881c-am8001280g-v1-1-fdf4d624c211@pengutronix.de>
Date:   Thu, 23 Nov 2023 18:08:04 +0100
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Neil Armstrong <neil.armstrong@...aro.org>,
        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, Philipp Zabel <p.zabel@...gutronix.de>
Subject: [PATCH 1/3] drm/panel: ilitek-ili9881c: make use of prepare_prev_first

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;

-- 
2.39.2