[PATCH 2/4] video: Add of_get_display_timing

[Ahmad Fatoum]

On 29.03.23 12:56, Philipp Zabel wrote:
> Add a port of the kernel of_get_display_timing() that writes a
> struct fb_videomode instead of struct display_timing, which we
> don't have.
> 
> Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>

Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>

> ---
>  drivers/video/of_display_timing.c | 22 ++++++++++++++++++++++
>  include/fb.h                      |  2 ++
>  2 files changed, 24 insertions(+)
> 
> diff --git a/drivers/video/of_display_timing.c b/drivers/video/of_display_timing.c
> index 6fe1e1b08b6a..6082d454932d 100644
> --- a/drivers/video/of_display_timing.c
> +++ b/drivers/video/of_display_timing.c
> @@ -98,6 +98,28 @@ static int of_parse_display_timing(const struct device_node *np,
>  	return 0;
>  }
>  
> +/**
> + * of_get_display_timing - parse a display_timing entry
> + * @np: device_node with the timing subnode
> + * @name: name of the timing node
> + * @mode: fb_videomode struct to fill
> + **/
> +int of_get_display_timing(const struct device_node *np, const char *name,
> +			  struct fb_videomode *mode)
> +{
> +	struct device_node *timing_np;
> +
> +	if (!np)
> +		return -EINVAL;
> +
> +	timing_np = of_get_child_by_name(np, name);
> +	if (!timing_np)
> +		return -ENOENT;
> +
> +	return of_parse_display_timing(timing_np, mode);
> +}
> +EXPORT_SYMBOL_GPL(of_get_display_timing);
> +
>  /**
>   * of_get_display_timings - parse all display_timing entries from a device_node
>   * @np: device_node with the subnodes
> diff --git a/include/fb.h b/include/fb.h
> index bf5f688342fd..15bb74b99576 100644
> --- a/include/fb.h
> +++ b/include/fb.h
> @@ -147,6 +147,8 @@ struct fb_info {
>  	int shadowfb;
>  };
>  
> +int of_get_display_timing(const struct device_node *np, const char *name,
> +			  struct fb_videomode *mode);
>  struct display_timings *of_get_display_timings(struct device_node *np);
>  void display_timings_release(struct display_timings *);
>  

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