[PATCH 2/2] drm/panel: lvds: Use bus_flags from DT panel-timing property

[Laurent Pinchart]

Hi Marek,

Thank you for the patch.

On Thu, Mar 31, 2022 at 09:23:47PM +0200, Marek Vasut wrote:
> This driver currently rewrites bus_flags based solely on the value of
> DT property 'data-mirror' and ignores bus_flags which might have been
> set in DT panel-timing node. Specificaly, the 'de-active' DT property
> sets DRM_BUS_FLAG_DE_ bus_flags.
> 
> Since of_get_drm_panel_display_mode() conveniently parses the bus_flags
> out of DT panel-timing property, just ORR them with bus_flags inferred
> from 'data-mirror' DT property and use the result as panel bus_flags.
> 
> This fixes handling of panels with 'panel-timing { de-active = <1>; };'.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Christoph Niedermaier <cniedermaier at dh-electronics.com>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: Dmitry Osipenko <digetx at gmail.com>
> Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> Cc: Robert Foss <robert.foss at linaro.org>
> Cc: Sam Ravnborg <sam at ravnborg.org>
> Cc: Thomas Zimmermann <tzimmermann at suse.de>
> To: dri-devel at lists.freedesktop.org

Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

> ---
>  drivers/gpu/drm/panel/panel-lvds.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-lvds.c b/drivers/gpu/drm/panel/panel-lvds.c
> index 65c6a6e9e223..f11252fb00fe 100644
> --- a/drivers/gpu/drm/panel/panel-lvds.c
> +++ b/drivers/gpu/drm/panel/panel-lvds.c
> @@ -33,7 +33,6 @@ struct panel_lvds {
>  	struct drm_display_mode dmode;
>  	u32 bus_flags;
>  	unsigned int bus_format;
> -	bool data_mirror;
>  
>  	struct regulator *supply;
>  
> @@ -99,9 +98,7 @@ static int panel_lvds_get_modes(struct drm_panel *panel,
>  	connector->display_info.height_mm = lvds->dmode.height_mm;
>  	drm_display_info_set_bus_formats(&connector->display_info,
>  					 &lvds->bus_format, 1);
> -	connector->display_info.bus_flags = lvds->data_mirror
> -					  ? DRM_BUS_FLAG_DATA_LSB_TO_MSB
> -					  : DRM_BUS_FLAG_DATA_MSB_TO_LSB;
> +	connector->display_info.bus_flags = lvds->bus_flags;
>  	drm_connector_set_panel_orientation(connector, lvds->orientation);
>  
>  	return 1;
> @@ -142,7 +139,9 @@ static int panel_lvds_parse_dt(struct panel_lvds *lvds)
>  
>  	lvds->bus_format = ret;
>  
> -	lvds->data_mirror = of_property_read_bool(np, "data-mirror");
> +	lvds->bus_flags |= of_property_read_bool(np, "data-mirror") ?
> +			   DRM_BUS_FLAG_DATA_LSB_TO_MSB :
> +			   DRM_BUS_FLAG_DATA_MSB_TO_LSB;
>  
>  	return 0;
>  }

-- 
Regards,

Laurent Pinchart