Add support to attach a drm_bridge to imx-ldb in addition to
existing support to attach a LVDS panel.
Signed-off-by: Peter Senna Tschudin <peter.senna@xxxxxxxxxxxxx>
---
drivers/gpu/drm/imx/imx-ldb.c | 75 +++++++++++++++++++++++++++++++------------
1 file changed, 54 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index a58eee5..7233a81 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -57,7 +57,11 @@ struct imx_ldb_channel {
struct imx_ldb *ldb;
struct drm_connector connector;
struct drm_encoder encoder;
+
+ /* Defines what is connected to the ldb, only one at a time */
struct drm_panel *panel;
+ struct drm_bridge *ext_bridge;
+
struct device_node *child;
int chno;
void *edid;
@@ -295,6 +299,10 @@ static void imx_ldb_encoder_mode_set(struct drm_encoder *encoder,
}
}
+static void imx_ldb_encoder_enable(struct drm_encoder *encoder)
+{
+}
+
static void imx_ldb_encoder_disable(struct drm_encoder *encoder)
{
struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
@@ -373,6 +381,7 @@ static const struct drm_encoder_helper_funcs imx_ldb_encoder_helper_funcs = {
.prepare = imx_ldb_encoder_prepare,
.commit = imx_ldb_encoder_commit,
.mode_set = imx_ldb_encoder_mode_set,
+ .enable = imx_ldb_encoder_enable,
.disable = imx_ldb_encoder_disable,
};
@@ -417,16 +426,28 @@ static int imx_ldb_register(struct drm_device *drm,
drm_encoder_init(drm, &imx_ldb_ch->encoder, &imx_ldb_encoder_funcs,
DRM_MODE_ENCODER_LVDS, NULL);
- drm_connector_helper_add(&imx_ldb_ch->connector,
- &imx_ldb_connector_helper_funcs);
- drm_connector_init(drm, &imx_ldb_ch->connector,
- &imx_ldb_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
-
- if (imx_ldb_ch->panel)
+ if (imx_ldb_ch->panel) {
+ drm_connector_helper_add(&imx_ldb_ch->connector,
+ &imx_ldb_connector_helper_funcs);
+ drm_connector_init(drm, &imx_ldb_ch->connector,
+ &imx_ldb_connector_funcs,
+ DRM_MODE_CONNECTOR_LVDS);
drm_panel_attach(imx_ldb_ch->panel, &imx_ldb_ch->connector);
- drm_mode_connector_attach_encoder(&imx_ldb_ch->connector,
- &imx_ldb_ch->encoder);
+ drm_mode_connector_attach_encoder(&imx_ldb_ch->connector,
+ &imx_ldb_ch->encoder);
+ }
+
+ if (imx_ldb_ch->ext_bridge) {
+ imx_ldb_ch->ext_bridge->encoder = &imx_ldb_ch->encoder;
+
+ imx_ldb_ch->encoder.bridge = imx_ldb_ch->ext_bridge;
+ ret = drm_bridge_attach(drm, imx_ldb_ch->ext_bridge);
+ if (ret) {
+ DRM_ERROR("Failed to initialize bridge with drm\n");
+ return ret;
+ }
+ }
return 0;
}
@@ -583,23 +604,35 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
endpoint = of_get_child_by_name(port, "endpoint");
if (endpoint) {
remote = of_graph_get_remote_port_parent(endpoint);
- if (remote)
- channel->panel = of_drm_find_panel(remote);
- else
- return -EPROBE_DEFER;
- if (!channel->panel) {
- dev_err(dev, "panel not found: %s\n",
- remote->full_name);
- return -EPROBE_DEFER;
+ if (remote) {
+ /* Only one of these two will succeed */
+ channel->panel =
+ of_drm_find_panel(remote);
+
+ channel->ext_bridge =
+ of_drm_find_bridge(remote);
+
+ /*
+ * If the bridge is compiled as a
+ * module, it may take some time until
+ * the bridge driver is available.
+ * Defer until the bridge driver is
+ * ready.
+ */
+ if (!channel->panel &&
+ !channel->ext_bridge)
+ return -EPROBE_DEFER;
}
}
}
- edidp = of_get_property(child, "edid", &channel->edid_len);
- if (edidp) {
- channel->edid = kmemdup(edidp, channel->edid_len,
- GFP_KERNEL);
- } else if (!channel->panel) {
+ if (channel->panel) {
+ edidp = of_get_property(child, "edid",
+ &channel->edid_len);
+ if (edidp)
+ channel->edid = kmemdup(edidp,
+ channel->edid_len, GFP_KERNEL);
+ } else {
ret = of_get_drm_display_mode(child, &channel->mode, 0);
if (!ret)
channel->mode_valid = 1;
--
2.5.5
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