Re: [PATCH 0/8] Add a panel API to return panel orientation

From: Hans de Goede
Date: Wed Jun 01 2022 - 04:51:19 EST


Hi,

On 6/1/22 10:18, Hsin-Yi Wang wrote:
> Panels usually call drm_connector_set_panel_orientation(), which is
> later than drm/kms driver calling drm_dev_register(). This leads to a
> WARN()[1].
>
> The orientation property is known earlier. For example, some panels
> parse the property through device tree during probe.
>
> The series add a panel API drm_panel_get_orientation() for drm/kms
> drivers. The drivers can use the API to get panel's orientation, so they
> can call drm_connector_set_panel_orientation() before drm_dev_register().
>
> Panel needs to implement .get_orientation callback to return the property.
>
> [1] https://patchwork.kernel.org/project/linux-mediatek/patch/20220530081910.3947168-2-hsinyi@xxxxxxxxxxxx/

Thank you for implementing this.

Patches 1-7 look good to me:

Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>

I've a few small remarks on patch 8, see my reply
to that patch.

Regards,

Hans


>
> Hsin-Yi Wang (8):
> drm/panel: Add an API drm_panel_get_orientation() to return panel
> orientation
> drm/panel: boe-tv101wum-nl6: Implement .get_orientation callback
> drm/panel: panel-edp: Implement .get_orientation callback
> drm/panel: lvds: Implement .get_orientation callback
> drm/panel: panel-simple: Implement .get_orientation callback
> drm/panel: ili9881c: Implement .get_orientation callback
> drm/panel: elida-kd35t133: Implement .get_orientation callback
> drm/mediatek: Config orientation property if panel provides it
>
> drivers/gpu/drm/drm_panel.c | 8 ++++++++
> drivers/gpu/drm/mediatek/mtk_dsi.c | 14 ++++++++++++++
> drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c | 8 ++++++++
> drivers/gpu/drm/panel/panel-edp.c | 8 ++++++++
> drivers/gpu/drm/panel/panel-elida-kd35t133.c | 8 ++++++++
> drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 8 ++++++++
> drivers/gpu/drm/panel/panel-lvds.c | 8 ++++++++
> drivers/gpu/drm/panel/panel-simple.c | 9 +++++++++
> include/drm/drm_panel.h | 10 ++++++++++
> 9 files changed, 81 insertions(+)
>