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drm/bridge: maxim-max96745: Add drm_connector support

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Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
Change-Id: Ic48fe3bdf7852f8a6d955dc8ead5083bbb9dc88f
This commit is contained in:
Wyon Bi
2022-05-30 00:28:38 +00:00
committed by Tao Huang
parent bc12849c27
commit f83021dfe1
1 changed files with 77 additions and 13 deletions
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90
drivers/gpu/drm/bridge/maxim-max96745.c
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@@ -24,6 +24,8 @@
struct max96745_bridge {
struct drm_bridge bridge;
struct drm_bridge *next_bridge;
struct drm_connector connector;
struct drm_panel *panel;
struct device *dev;
struct regmap *regmap;
@@ -31,22 +33,82 @@ struct max96745_bridge {
#define to_max96745_bridge(x) container_of(x, struct max96745_bridge, x)
static int max96745_bridge_connector_get_modes(struct drm_connector *connector)
{
struct max96745_bridge *ser = to_max96745_bridge(connector);
if (ser->next_bridge)
return drm_bridge_get_modes(ser->next_bridge, connector);
return drm_panel_get_modes(ser->panel, connector);
}
static const struct drm_connector_helper_funcs
max96745_bridge_connector_helper_funcs = {
.get_modes = max96745_bridge_connector_get_modes,
};
static enum drm_connector_status
max96745_bridge_connector_detect(struct drm_connector *connector, bool force)
{
struct max96745_bridge *ser = to_max96745_bridge(connector);
return drm_bridge_detect(&ser->bridge);
}
static const struct drm_connector_funcs max96745_bridge_connector_funcs = {
.reset = drm_atomic_helper_connector_reset,
.fill_modes = drm_helper_probe_single_connector_modes,
.detect = max96745_bridge_connector_detect,
.destroy = drm_connector_cleanup,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int max96745_bridge_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
struct max96745_bridge *ser = to_max96745_bridge(bridge);
struct drm_connector *connector = &ser->connector;
int ret;
ret = drm_of_find_panel_or_bridge(bridge->of_node, 1, -1, NULL,
ret = drm_of_find_panel_or_bridge(bridge->of_node, 1, -1, &ser->panel,
&ser->next_bridge);
if (ret)
return ret;
return drm_bridge_attach(bridge->encoder, ser->next_bridge, bridge, 0);
if (ser->next_bridge) {
ret = drm_bridge_attach(bridge->encoder, ser->next_bridge,
bridge, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
if (ret)
return ret;
}
connector->polled = DRM_CONNECTOR_POLL_CONNECT |
DRM_CONNECTOR_POLL_DISCONNECT;
drm_connector_helper_add(connector,
&max96745_bridge_connector_helper_funcs);
ret = drm_connector_init(bridge->dev, connector,
&max96745_bridge_connector_funcs,
ser->next_bridge ? ser->next_bridge->type : bridge->type);
if (ret) {
DRM_ERROR("Failed to initialize connector\n");
return ret;
}
drm_connector_attach_encoder(connector, bridge->encoder);
return 0;
}
static void max96745_bridge_pre_enable(struct drm_bridge *bridge)
{
struct max96745_bridge *ser = to_max96745_bridge(bridge);
if (ser->panel)
drm_panel_prepare(ser->panel);
}
static void max96745_bridge_enable(struct drm_bridge *bridge)
@@ -55,41 +117,43 @@ static void max96745_bridge_enable(struct drm_bridge *bridge)
regmap_update_bits(ser->regmap, 0x0100, VID_TX_EN,
FIELD_PREP(VID_TX_EN, 1));
if (ser->panel)
drm_panel_enable(ser->panel);
}
static void max96745_bridge_disable(struct drm_bridge *bridge)
{
struct max96745_bridge *ser = to_max96745_bridge(bridge);
if (ser->panel)
drm_panel_disable(ser->panel);
regmap_update_bits(ser->regmap, 0x0100, VID_TX_EN,
FIELD_PREP(VID_TX_EN, 0));
}
static void max96745_bridge_post_disable(struct drm_bridge *bridge)
{
struct max96745_bridge *ser = to_max96745_bridge(bridge);
if (ser->panel)
drm_panel_unprepare(ser->panel);
}
static enum drm_connector_status
max96745_bridge_detect(struct drm_bridge *bridge)
{
struct drm_bridge *prev_bridge = drm_bridge_get_prev_bridge(bridge);
struct max96745_bridge *ser = to_max96745_bridge(bridge);
u32 val;
if (prev_bridge) {
if (prev_bridge->ops & DRM_BRIDGE_OP_DETECT) {
if (drm_bridge_detect(prev_bridge) != connector_status_connected)
return connector_status_disconnected;
}
}
if (regmap_read(ser->regmap, 0x002a, &val))
return connector_status_disconnected;
if (FIELD_GET(LINK_LOCKED, val))
return connector_status_connected;
else
if (!FIELD_GET(LINK_LOCKED, val))
return connector_status_disconnected;
return connector_status_connected;
}
static const struct drm_bridge_funcs max96745_bridge_funcs = {