linux-kernel - [PATCH] drm: of: Fix drm_of_get_data_lanes_count

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Message-ID: <20260115024610.661624-1-marek.vasut+renesas@mailbox.org>
Date: Thu, 15 Jan 2026 03:45:53 +0100
From: Marek Vasut <marek.vasut+renesas@...lbox.org>
To: dri-devel@...ts.freedesktop.org
Cc: Marek Vasut <marek.vasut+renesas@...lbox.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	David Airlie <airlied@...il.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Simona Vetter <simona@...ll.ch>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org
Subject: [PATCH] drm: of: Fix drm_of_get_data_lanes_count_ep() return value documentation

Update drm_of_get_data_lanes_count_ep() return value documentation
to match the drm_of_get_data_lanes_count() return value documentation.
The drm_of_get_data_lanes_count_ep() is only a wrapper around the
drm_of_get_data_lanes_count() and therefore returns the same error
codes.

Fixes: fc801750b197 ("drm: of: Add drm_of_get_data_lanes_count and drm_of_get_data_lanes_ep")
Reported-by: Geert Uytterhoeven <geert+renesas@...der.be>
Signed-off-by: Marek Vasut <marek.vasut+renesas@...lbox.org>
---
Cc: David Airlie <airlied@...il.com>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc: Maxime Ripard <mripard@...nel.org>
Cc: Simona Vetter <simona@...ll.ch>
Cc: Thomas Zimmermann <tzimmermann@...e.de>
Cc: dri-devel@...ts.freedesktop.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-renesas-soc@...r.kernel.org
---
 drivers/gpu/drm/drm_of.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c
index 4f65ce729a473..cfd0518174de8 100644
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c
@@ -539,8 +539,8 @@ EXPORT_SYMBOL_GPL(drm_of_get_data_lanes_count);
  *
  * Return:
  * * min..max - positive integer count of "data-lanes" elements
- * * -EINVAL - the "data-mapping" property is unsupported
- * * -ENODEV - the "data-mapping" property is missing
+ * * -ve - the "data-lanes" property is missing or invalid
+ * * -EINVAL - the "data-lanes" property is unsupported
  */
 int drm_of_get_data_lanes_count_ep(const struct device_node *port,
 				   int port_reg, int reg,
-- 
2.51.0