[PATCH v2] drm/mediatek: Set default value for Panel Orientation connector prop.

[Chun-Kuang Hu]

Hi, Mark:

Mark Yacoub <markyacoub at chromium.org> 於 2021年12月30日 週四 上午2:44寫道：
>
> [Why]
> Creating the prop uses UNKNOWN as the initial value, which is not a
> supported value if the prop is to be supported.
>
> [How]
> Set the panel orientation default value to NORMAL right after creating
> the prop if no DSI panel exists.
> Panels have their own orientations, and panel orientation can't be
> overriden once initialized to a value.
>
> v1:
> Set panel orientation only if DSI panel does not exist.
>
> Tested on Jacuzzi(MTK)
> Fixes IGT at kms_properties@get_properties-sanity-{atomic,non-atomic}
>
> Signed-off-by: Mark Yacoub <markyacoub at chromium.org>
> ---
>  drivers/gpu/drm/mediatek/mtk_dsi.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index 0ad7157660afa..9d33dd93118e0 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -1040,6 +1040,13 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
>                 goto err_cleanup_encoder;
>         }
>
> +       /* A drm_panel can have its own orientation. If there is no panel, set the
> +        * orientation to NORMAL. */
> +       if (!dsi->panel) {

Please send patch based on latest kernel version. In latest kernel
version, struct mtk_dsi{} has no member 'panel'.

Regards,
Chun-Kuang.

> +               drm_connector_set_panel_orientation(
> +                       dsi->connector, DRM_MODE_PANEL_ORIENTATION_NORMAL);
> +       }
> +
>         drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
>
>         return 0;
> --
> 2.34.1.448.ga2b2bfdf31-goog
>