Re: [PATCH 2/2] drm/bridge: it66121: Wait for next bridge to be probed

[Neil Armstrong]

On 27/08/2021 18:39, Paul Cercueil wrote:
> If run before the next bridge is initialized, of_drm_find_bridge() will
> give us a NULL pointer.
> 
> If that's the case, return -EPROBE_DEFER; we may have more luck next
> time.
> 

Fixes: 988156dc2fc9 ("drm: bridge: add it66121 driver")

> Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/bridge/ite-it66121.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c
> index b130d01147c6..9dc41a7b9136 100644
> --- a/drivers/gpu/drm/bridge/ite-it66121.c
> +++ b/drivers/gpu/drm/bridge/ite-it66121.c
> @@ -924,6 +924,9 @@ static int it66121_probe(struct i2c_client *client,
>  	ctx->next_bridge = of_drm_find_bridge(ep);
>  	of_node_put(ep);
>  
> +	if (!ctx->next_bridge)
> +		return -EPROBE_DEFER;
> +
>  	i2c_set_clientdata(client, ctx);
>  	mutex_init(&ctx->lock);
>  
> 


Reviewed-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>

Thanks,
Neil