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drm/rockchip: dw-dp: support external bridge

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Change-Id: Ic04fdec4c4559851124fe6a205c8442c120e146d
Signed-off-by: Zhang Yubing <yubing.zhang@rock-chips.com>
This commit is contained in:
Zhang Yubing
2024-04-17 11:19:50 +08:00
committed by Tao Huang
parent 793f858ef2
commit c8094ce9fd
1 changed files with 58 additions and 1 deletions
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59
drivers/gpu/drm/rockchip/dw-dp.c
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@@ -418,6 +418,7 @@ struct dw_dp_mst_enc {
struct dw_dp_video video;
struct dw_dp_audio *audio;
struct device_node *port_node;
struct drm_bridge *next_bridge;
DECLARE_BITMAP(sdp_reg_bank, SDP_REG_BANK_SIZE);
@@ -3264,14 +3265,39 @@ static const struct drm_connector_funcs dw_dp_mst_connector_funcs = {
.early_unregister = dw_dp_mst_connector_early_unregister,
};
static struct drm_bridge *dw_dp_mst_connector_get_bridge(struct dw_dp_mst_conn *mst_conn)
{
struct dw_dp *dp = mst_conn->dp;
int i;
if (!dp->is_fix_port)
return NULL;
for (i = 0; i < dp->mst_port_num; i++)
if (dp->mst_enc[i].fix_port_num == mst_conn->port->port_num)
return dp->mst_enc[i].next_bridge;
return NULL;
}
static int dw_dp_mst_connector_get_modes(struct drm_connector *connector)
{
struct dw_dp_mst_conn *mst_conn = container_of(connector,
struct dw_dp_mst_conn, connector);
struct dw_dp *dp = mst_conn->dp;
struct drm_bridge *bridge;
struct edid *edid;
int num_modes = 0;
if (dp->is_fix_port) {
bridge = dw_dp_mst_connector_get_bridge(mst_conn);
if (bridge) {
num_modes = drm_bridge_get_modes(bridge, connector);
if (num_modes)
return num_modes;
}
}
edid = drm_dp_mst_get_edid(connector, &dp->mst_mgr, mst_conn->port);
if (edid) {
drm_connector_update_edid_property(connector, edid);
@@ -4020,6 +4046,32 @@ static int dw_dp_mst_get_fix_port(struct dw_dp *dp)
return 0;
}
static int dw_dp_mst_find_ext_bridges(struct dw_dp *dp)
{
struct dw_dp_mst_enc *mst_enc;
int i, ret;
for (i = 0; i < dp->mst_port_num; i++) {
mst_enc = &dp->mst_enc[i];
if (!of_device_is_available(dp->mst_enc[i].port_node))
continue;
ret = drm_of_find_panel_or_bridge(mst_enc->port_node, 2, -1, NULL,
&mst_enc->next_bridge);
if (ret < 0 && ret != -ENODEV)
return ret;
if (mst_enc->next_bridge) {
ret = drm_bridge_attach(&mst_enc->encoder, mst_enc->next_bridge, NULL, 0);
if (ret) {
DRM_DEV_ERROR(dp->dev, "failed to attach next bridge: %d\n", ret);
return ret;
}
}
}
return 0;
}
static int dw_dp_mst_encoder_init(struct dw_dp *dp, int conn_base_id)
{
int ret;
@@ -4034,6 +4086,9 @@ static int dw_dp_mst_encoder_init(struct dw_dp *dp, int conn_base_id)
if (ret)
return ret;
ret = dw_dp_mst_find_ext_bridges(dp);
if (ret)
return ret;
ret = drm_dp_mst_topology_mgr_init(&dp->mst_mgr, dp->encoder.dev,
&dp->aux, 16, dp->mst_port_num, conn_base_id);
if (ret)
@@ -4070,7 +4125,9 @@ static int dw_dp_connector_init(struct dw_dp *dp)
drm_connector_attach_encoder(connector, bridge->encoder);
dw_dp_mst_encoder_init(dp, connector->base.id);
ret = dw_dp_mst_encoder_init(dp, connector->base.id);
if (ret)
return ret;
prop = drm_property_create_enum(connector->dev, 0, RK_IF_PROP_COLOR_DEPTH,
color_depth_enum_list,
ARRAY_SIZE(color_depth_enum_list));