Unverified Commit 5ea6b170 authored by Dave Stevenson's avatar Dave Stevenson Committed by Maxime Ripard
Browse files

drm/panel: Add prepare_prev_first flag to drm_panel 



Mapping to the drm_bridge flag pre_enable_prev_first,
add a new flag prepare_prev_first to drm_panel to allow
the panel driver to request that the upstream bridge should
be pre_enabled before the panel prepare.

Signed-off-by: default avatarDave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20221205173328.1395350-6-dave.stevenson@raspberrypi.com


Signed-off-by: default avatarMaxime Ripard <maxime@cerno.tech>
parent 4fb912e5

drivers/gpu/drm/bridge/panel.c

+2 −0
Original line number Diff line number Diff line
@@ -364,6 +364,8 @@ struct drm_bridge *devm_drm_panel_bridge_add_typed(struct device *dev, 
		devres_free(ptr);

	}



	bridge->pre_enable_prev_first = panel->prepare_prev_first;



	return bridge;

}

EXPORT_SYMBOL(devm_drm_panel_bridge_add_typed);

include/drm/drm_panel.h

+10 −0
Original line number Diff line number Diff line
@@ -188,6 +188,16 @@ struct drm_panel { 
	 * Panel entry in registry.

	 */

	struct list_head list;



	/**

	 * @prepare_prev_first:

	 *

	 * The previous controller should be prepared first, before the prepare

	 * for the panel is called. This is largely required for DSI panels

	 * where the DSI host controller should be initialised to LP-11 before

	 * the panel is powered up.

	 */

	bool prepare_prev_first;

};



void drm_panel_init(struct drm_panel *panel, struct device *dev,