linux-kernel - [PATCH 04/32] drm/mcde: remove redundant lanes number check

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Message-Id: <20250625-drm-dsi-host-no-device-ptr-v1-4-e36bc258a7c5@bootlin.com>
Date: Wed, 25 Jun 2025 18:45:08 +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 04/32] drm/mcde: 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/mcde/mcde_dsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mcde/mcde_dsi.c b/drivers/gpu/drm/mcde/mcde_dsi.c
index a3423459dd7ac8395b77d0479a02ebb3a9ba259c..8e3b9c9c64e99239e54ba5a338cf3bbb6c84b40f 100644
--- a/drivers/gpu/drm/mcde/mcde_dsi.c
+++ b/drivers/gpu/drm/mcde/mcde_dsi.c
@@ -172,7 +172,7 @@ static int mcde_dsi_host_attach(struct mipi_dsi_host *host,
 {
 	struct mcde_dsi *d = host_to_mcde_dsi(host);
 
-	if (mdsi->lanes < 1 || mdsi->lanes > 2) {
+	if (mdsi->lanes > 2) {
 		DRM_ERROR("dsi device params invalid, 1 or 2 lanes supported\n");
 		return -EINVAL;
 	}

-- 
2.49.0