linux-kernel - [PATCH 03/32] drm/bridge: nwl-dsi: remove redundant lanes number check

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Message-Id: <20250625-drm-dsi-host-no-device-ptr-v1-3-e36bc258a7c5@bootlin.com>
Date: Wed, 25 Jun 2025 18:45:07 +0200
From: Luca Ceresoli <luca.ceresoli@...tlin.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Andrzej Hajda <andrzej.hajda@...el.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Inki Dae <inki.dae@...sung.com>, Jagan Teki <jagan@...rulasolutions.com>, 
 Marek Szyprowski <m.szyprowski@...sung.com>, 
 Jani Nikula <jani.nikula@...ux.intel.com>, 
 Dmitry Baryshkov <lumag@...nel.org>
Cc: Hui Pu <Hui.Pu@...ealthcare.com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-sunxi@...ts.linux.dev, Luca Ceresoli <luca.ceresoli@...tlin.com>
Subject: [PATCH 03/32] drm/bridge: nwl-dsi: remove redundant lanes number
 check

Checking that the number of lanes is > 0 is now done by the DRM MIPI DSI
core in mipi_dsi_attach().

Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
---
 drivers/gpu/drm/bridge/nwl-dsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c b/drivers/gpu/drm/bridge/nwl-dsi.c
index 2f7429b24fc20db104dec17182f1119c6c75e600..ccce663192b35a795dad8cb479203d05b414173b 100644
--- a/drivers/gpu/drm/bridge/nwl-dsi.c
+++ b/drivers/gpu/drm/bridge/nwl-dsi.c
@@ -352,7 +352,7 @@ static int nwl_dsi_host_attach(struct mipi_dsi_host *dsi_host,
 	DRM_DEV_INFO(dev, "lanes=%u, format=0x%x flags=0x%lx\n", device->lanes,
 		     device->format, device->mode_flags);
 
-	if (device->lanes < 1 || device->lanes > 4)
+	if (device->lanes > 4)
 		return -EINVAL;
 
 	dsi->lanes = device->lanes;

-- 
2.49.0