From 185443efa26a62b7d1401c89b83c89a1a2601350 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Tue, 24 May 2022 03:05:21 +0200
Subject: drm/msm: Convert to drm_of_get_data_lanes_count

Convert driver to use this new helper to standardize
OF "data-lanes" parsing.

Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Sean Paul <sean@poorly.run>
To: dri-devel@lists.freedesktop.org
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220524010522.528569-10-marex@denx.de
---
 drivers/gpu/drm/msm/dsi/dsi_host.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu/drm/msm/dsi/dsi_host.c')

diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index d51e70fab93d..63969e464dbe 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -1673,11 +1673,10 @@ static int dsi_host_parse_lane_data(struct msm_dsi_host *msm_host,
 		return 0;
 	}
 
-	num_lanes = len / sizeof(u32);
-
-	if (num_lanes < 1 || num_lanes > 4) {
+	num_lanes = drm_of_get_data_lanes_count(ep, 1, 4);
+	if (num_lanes < 0) {
 		DRM_DEV_ERROR(dev, "bad number of data lanes\n");
-		return -EINVAL;
+		return num_lanes;
 	}
 
 	msm_host->num_data_lanes = num_lanes;
-- 
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