linux-kernel - Re: [PATCH v1] drm/mipi-dsi: Set the fwnode for mipi_dsi

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Message-ID: <4737cacc741c939ca1d980a4858d0748faad11f8.camel@puri.sm>
Date:   Sun, 12 Mar 2023 15:45:22 +0100
From:   Martin Kepplinger <martin.kepplinger@...i.sm>
To:     Saravana Kannan <saravanak@...gle.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Thierry Reding <treding@...dia.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Kyungmin Park <kyungmin.park@...sung.com>
Cc:     kernel-team@...roid.com, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] drm/mipi-dsi: Set the fwnode for mipi_dsi_device

Am Donnerstag, dem 09.03.2023 um 22:39 -0800 schrieb Saravana Kannan:
> After commit 3fb16866b51d ("driver core: fw_devlink: Make cycle
> detection more robust"), fw_devlink prints an error when consumer
> devices don't have their fwnode set. This used to be ignored
> silently.
> 
> Set the fwnode mipi_dsi_device so fw_devlink can find them and
> properly
> track their dependencies.
> 
> This fixes errors like this:
> [    0.334054] nwl-dsi 30a00000.mipi-dsi: Failed to create device
> link with regulator-lcd-1v8
> [    0.346964] nwl-dsi 30a00000.mipi-dsi: Failed to create device
> link with backlight-dsi
> 
> Reported-by: Martin Kepplinger <martin.kepplinger@...i.sm>

Reported-and-tested-by: Martin Kepplinger <martin.kepplinger@...i.sm>

thanks,
                         martin

> Link: 
> https://lore.kernel.org/lkml/2a8e407f4f18c9350f8629a2b5fa18673355b2ae.camel@puri.sm/
> Fixes: 068a00233969 ("drm: Add MIPI DSI bus support")
> Signed-off-by: Saravana Kannan <saravanak@...gle.com>
> ---
>  drivers/gpu/drm/drm_mipi_dsi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_mipi_dsi.c
> b/drivers/gpu/drm/drm_mipi_dsi.c
> index b41aaf2bb9f1..7923cc21b78e 100644
> --- a/drivers/gpu/drm/drm_mipi_dsi.c
> +++ b/drivers/gpu/drm/drm_mipi_dsi.c
> @@ -221,7 +221,7 @@ mipi_dsi_device_register_full(struct
> mipi_dsi_host *host,
>                 return dsi;
>         }
>  
> -       dsi->dev.of_node = info->node;
> +       device_set_node(&dsi->dev, of_fwnode_handle(info->node));
>         dsi->channel = info->channel;
>         strlcpy(dsi->name, info->type, sizeof(dsi->name));
>