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These are for setting up internal state for the connector/panel pair that can't be done at probe (since the connector doesn't exist) and which don't need to be repeatedly done for every get/modes, prepare, or enable callback. Values such as the panel orientation, and display size can be filled in for the connector. Signed-off-by: Derek Basehore --- drivers/gpu/drm/drm_panel.c | 14 ++++++++++++++ include/drm/drm_panel.h | 4 ++++ 2 files changed, 18 insertions(+) diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c index 3b689ce4a51a..72f67678d9d5 100644 --- a/drivers/gpu/drm/drm_panel.c +++ b/drivers/gpu/drm/drm_panel.c @@ -104,12 +104,23 @@ EXPORT_SYMBOL(drm_panel_remove); */ int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector) { + int ret; + if (panel->connector) return -EBUSY; panel->connector = connector; panel->drm = connector->dev; + if (panel->funcs->attach) { + ret = panel->funcs->attach(panel); + if (ret < 0) { + panel->connector = NULL; + panel->drm = NULL; + return ret; + } + } + return 0; } EXPORT_SYMBOL(drm_panel_attach); @@ -128,6 +139,9 @@ EXPORT_SYMBOL(drm_panel_attach); */ int drm_panel_detach(struct drm_panel *panel) { + if (panel->funcs->detach) + panel->funcs->detach(panel); + panel->connector = NULL; panel->drm = NULL; diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h index 13631b2efbaa..e136e3a3c996 100644 --- a/include/drm/drm_panel.h +++ b/include/drm/drm_panel.h @@ -37,6 +37,8 @@ struct display_timing; * struct drm_panel_funcs - perform operations on a given panel * @disable: disable panel (turn off back light, etc.) * @unprepare: turn off panel + * @detach: detach panel->connector (clear internal state, etc.) + * @attach: attach panel->connector (update internal state, etc.) * @prepare: turn on panel and perform set up * @enable: enable panel (turn on back light, etc.) * @get_modes: add modes to the connector that the panel is attached to and @@ -70,6 +72,8 @@ struct display_timing; struct drm_panel_funcs { int (*disable)(struct drm_panel *panel); int (*unprepare)(struct drm_panel *panel); + void (*detach)(struct drm_panel *panel); + int (*attach)(struct drm_panel *panel); int (*prepare)(struct drm_panel *panel); int (*enable)(struct drm_panel *panel); int (*get_modes)(struct drm_panel *panel);