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

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Message-ID: <bd453972-529b-42bc-8b8d-41afd1f5008d@mailbox.org>
Date: Fri, 6 Feb 2026 12:49:41 +0100
From: Marek Vasut <marek.vasut@...lbox.org>
To: dri-devel@...ts.freedesktop.org
Cc: 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: Re: [PATCH] drm: of: Fix drm_of_get_data_lanes_count_ep() return
 value documentation

On 1/15/26 3:45 AM, Marek Vasut wrote:
> 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,


Is anything missing here or can this be applied ?

Thank you