[PATCH 05/13] drm/sun4i: tcon: Set output mux for DSI and LVDS

[Chen-Yu Tsai]

On Tue, Aug 4, 2026 at 12:11 AM Jernej Skrabec <jernej.skrabec at gmail.com> wrote:
>
> DSI and LVDS skip output mux setup, so TCON TOP cannot route the selected
> mixer. Configure them like other channel 0 outputs.
>
> In practice this matters for D1, where channel 0 TCONs are fed through
> TCON TOP. The remaining set_mux implementations only handle TMDS and
> return an error for other encoder types, as before.
>
> Fixes: b9b52d2f4aaf ("drm/sun4i: Add support for D1 TCONs")
> Signed-off-by: Jernej Skrabec <jernej.skrabec at gmail.com>

Acked-by: Chen-Yu Tsai <wens at kernel.org>

> ---
>  drivers/gpu/drm/sun4i/sun4i_tcon.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
> index 960e83c8291d..ea7c90fef316 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
> @@ -717,9 +717,11 @@ void sun4i_tcon_mode_set(struct sun4i_tcon *tcon,
>         case DRM_MODE_ENCODER_DSI:
>                 /* DSI is tied to special case of CPU interface */
>                 sun4i_tcon0_mode_set_cpu(tcon, encoder, mode);
> +               sun4i_tcon_set_mux(tcon, 0, encoder);
>                 break;
>         case DRM_MODE_ENCODER_LVDS:
>                 sun4i_tcon0_mode_set_lvds(tcon, encoder, mode);
> +               sun4i_tcon_set_mux(tcon, 0, encoder);
>                 break;
>         case DRM_MODE_ENCODER_NONE:
>                 sun4i_tcon0_mode_set_rgb(tcon, encoder, mode);
> --
> 2.43.0
>
>