Hi, On Wed, Jun 1, 2022 at 2:46 AM Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx> 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/ > > 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 | 10 ++++++++++ > 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, 77 insertions(+) Seems reasonable to me. I added a request to the panel-edp patch that probably applies to all of the panel patches requesting a comment next to the old calls in get_modes(). I assume that all but patch #8 ought to land through drm-misc. I'm happy to help commit them once everyone is happy. If the Mediatek maintainer(s) want to Ack patch #8 I can land that in drm-misc too. If we want something fancier like an immutable branch you'll probably have to get someone involved that's got a higher drm pay grade than me. ;-) -Doug
