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SubjectRe: [PATCH/RFC 09/12] drm: rcar-du: lvds: Fix companion's mode
Hi Fabrizio,

Thank you for the patch.

On Fri, Aug 02, 2019 at 08:34:06AM +0100, Fabrizio Castro wrote:
> The companion encoder needs to be told to use the same
> mode as the primary encoder.
>
> Fixes: e9e8798ab7b8 ("drm: rcar-du: lvds: Add support for dual-link mode")
> Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
> ---
> drivers/gpu/drm/rcar-du/rcar_lvds.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> index edd63f5..7944ae9 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> @@ -415,8 +415,12 @@ static void rcar_lvds_enable(struct drm_bridge *bridge)
> return;
>
> /* Enable the companion LVDS encoder in dual-link mode. */
> - if (lvds->dual_link && lvds->companion)
> + if (lvds->dual_link && lvds->companion) {
> + struct rcar_lvds *companion_lvds = bridge_to_rcar_lvds(
> + lvds->companion);
> + companion_lvds->mode = lvds->mode;
> lvds->companion->funcs->enable(lvds->companion);
> + }

Would it make sense to do this in rcar_lvds_mode_set() instead, to keep
the mode set code grouped in a single place ?

>
> /*
> * Hardcode the channels and control signals routing for now.

--
Regards,

Laurent Pinchart

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