235 lines
6.3 KiB
C
235 lines
6.3 KiB
C
/*
|
|
* Copyright (C) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
|
|
* Copyright (C) 2017 Broadcom
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <drm/drmP.h>
|
|
#include <drm/drm_panel.h>
|
|
#include <drm/drm_atomic_helper.h>
|
|
#include <drm/drm_connector.h>
|
|
#include <drm/drm_crtc_helper.h>
|
|
#include <drm/drm_encoder.h>
|
|
#include <drm/drm_modeset_helper_vtables.h>
|
|
#include <drm/drm_panel.h>
|
|
|
|
struct panel_bridge {
|
|
struct drm_bridge bridge;
|
|
struct drm_connector connector;
|
|
struct drm_panel *panel;
|
|
u32 connector_type;
|
|
};
|
|
|
|
static inline struct panel_bridge *
|
|
drm_bridge_to_panel_bridge(struct drm_bridge *bridge)
|
|
{
|
|
return container_of(bridge, struct panel_bridge, bridge);
|
|
}
|
|
|
|
static inline struct panel_bridge *
|
|
drm_connector_to_panel_bridge(struct drm_connector *connector)
|
|
{
|
|
return container_of(connector, struct panel_bridge, connector);
|
|
}
|
|
|
|
static int panel_bridge_connector_get_modes(struct drm_connector *connector)
|
|
{
|
|
struct panel_bridge *panel_bridge =
|
|
drm_connector_to_panel_bridge(connector);
|
|
|
|
return drm_panel_get_modes(panel_bridge->panel);
|
|
}
|
|
|
|
static const struct drm_connector_helper_funcs
|
|
panel_bridge_connector_helper_funcs = {
|
|
.get_modes = panel_bridge_connector_get_modes,
|
|
};
|
|
|
|
static const struct drm_connector_funcs panel_bridge_connector_funcs = {
|
|
.reset = drm_atomic_helper_connector_reset,
|
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
|
.destroy = drm_connector_cleanup,
|
|
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
|
|
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
|
};
|
|
|
|
static int panel_bridge_attach(struct drm_bridge *bridge)
|
|
{
|
|
struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
|
|
struct drm_connector *connector = &panel_bridge->connector;
|
|
int ret;
|
|
|
|
if (!bridge->encoder) {
|
|
DRM_ERROR("Missing encoder\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
drm_connector_helper_add(connector,
|
|
&panel_bridge_connector_helper_funcs);
|
|
|
|
ret = drm_connector_init(bridge->dev, connector,
|
|
&panel_bridge_connector_funcs,
|
|
panel_bridge->connector_type);
|
|
if (ret) {
|
|
DRM_ERROR("Failed to initialize connector\n");
|
|
return ret;
|
|
}
|
|
|
|
drm_connector_attach_encoder(&panel_bridge->connector,
|
|
bridge->encoder);
|
|
|
|
ret = drm_panel_attach(panel_bridge->panel, &panel_bridge->connector);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void panel_bridge_detach(struct drm_bridge *bridge)
|
|
{
|
|
struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
|
|
|
|
drm_panel_detach(panel_bridge->panel);
|
|
}
|
|
|
|
static void panel_bridge_pre_enable(struct drm_bridge *bridge)
|
|
{
|
|
struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
|
|
|
|
drm_panel_prepare(panel_bridge->panel);
|
|
}
|
|
|
|
static void panel_bridge_enable(struct drm_bridge *bridge)
|
|
{
|
|
struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
|
|
|
|
drm_panel_enable(panel_bridge->panel);
|
|
}
|
|
|
|
static void panel_bridge_disable(struct drm_bridge *bridge)
|
|
{
|
|
struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
|
|
|
|
drm_panel_disable(panel_bridge->panel);
|
|
}
|
|
|
|
static void panel_bridge_post_disable(struct drm_bridge *bridge)
|
|
{
|
|
struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
|
|
|
|
drm_panel_unprepare(panel_bridge->panel);
|
|
}
|
|
|
|
static const struct drm_bridge_funcs panel_bridge_bridge_funcs = {
|
|
.attach = panel_bridge_attach,
|
|
.detach = panel_bridge_detach,
|
|
.pre_enable = panel_bridge_pre_enable,
|
|
.enable = panel_bridge_enable,
|
|
.disable = panel_bridge_disable,
|
|
.post_disable = panel_bridge_post_disable,
|
|
};
|
|
|
|
/**
|
|
* drm_panel_bridge_add - Creates a drm_bridge and drm_connector that
|
|
* just calls the appropriate functions from drm_panel.
|
|
*
|
|
* @panel: The drm_panel being wrapped. Must be non-NULL.
|
|
* @connector_type: The DRM_MODE_CONNECTOR_* for the connector to be
|
|
* created.
|
|
*
|
|
* For drivers converting from directly using drm_panel: The expected
|
|
* usage pattern is that during either encoder module probe or DSI
|
|
* host attach, a drm_panel will be looked up through
|
|
* drm_of_find_panel_or_bridge(). drm_panel_bridge_add() is used to
|
|
* wrap that panel in the new bridge, and the result can then be
|
|
* passed to drm_bridge_attach(). The drm_panel_prepare() and related
|
|
* functions can be dropped from the encoder driver (they're now
|
|
* called by the KMS helpers before calling into the encoder), along
|
|
* with connector creation. When done with the bridge,
|
|
* drm_bridge_detach() should be called as normal, then
|
|
* drm_panel_bridge_remove() to free it.
|
|
*/
|
|
struct drm_bridge *drm_panel_bridge_add(struct drm_panel *panel,
|
|
u32 connector_type)
|
|
{
|
|
struct panel_bridge *panel_bridge;
|
|
|
|
if (!panel)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
panel_bridge = devm_kzalloc(panel->dev, sizeof(*panel_bridge),
|
|
GFP_KERNEL);
|
|
if (!panel_bridge)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
panel_bridge->connector_type = connector_type;
|
|
panel_bridge->panel = panel;
|
|
|
|
panel_bridge->bridge.funcs = &panel_bridge_bridge_funcs;
|
|
#ifdef CONFIG_OF
|
|
panel_bridge->bridge.of_node = panel->dev->of_node;
|
|
#endif
|
|
|
|
drm_bridge_add(&panel_bridge->bridge);
|
|
|
|
return &panel_bridge->bridge;
|
|
}
|
|
EXPORT_SYMBOL(drm_panel_bridge_add);
|
|
|
|
/**
|
|
* drm_panel_bridge_remove - Unregisters and frees a drm_bridge
|
|
* created by drm_panel_bridge_add().
|
|
*
|
|
* @bridge: The drm_bridge being freed.
|
|
*/
|
|
void drm_panel_bridge_remove(struct drm_bridge *bridge)
|
|
{
|
|
struct panel_bridge *panel_bridge;
|
|
|
|
if (!bridge)
|
|
return;
|
|
|
|
if (bridge->funcs != &panel_bridge_bridge_funcs)
|
|
return;
|
|
|
|
panel_bridge = drm_bridge_to_panel_bridge(bridge);
|
|
|
|
drm_bridge_remove(bridge);
|
|
devm_kfree(panel_bridge->panel->dev, bridge);
|
|
}
|
|
EXPORT_SYMBOL(drm_panel_bridge_remove);
|
|
|
|
static void devm_drm_panel_bridge_release(struct device *dev, void *res)
|
|
{
|
|
struct drm_bridge **bridge = res;
|
|
|
|
drm_panel_bridge_remove(*bridge);
|
|
}
|
|
|
|
struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev,
|
|
struct drm_panel *panel,
|
|
u32 connector_type)
|
|
{
|
|
struct drm_bridge **ptr, *bridge;
|
|
|
|
ptr = devres_alloc(devm_drm_panel_bridge_release, sizeof(*ptr),
|
|
GFP_KERNEL);
|
|
if (!ptr)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
bridge = drm_panel_bridge_add(panel, connector_type);
|
|
if (!IS_ERR(bridge)) {
|
|
*ptr = bridge;
|
|
devres_add(dev, ptr);
|
|
} else {
|
|
devres_free(ptr);
|
|
}
|
|
|
|
return bridge;
|
|
}
|
|
EXPORT_SYMBOL(devm_drm_panel_bridge_add);
|