static int exynos_dp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = NULL, *endpoint = NULL;
struct exynos_dp_device *dp;
dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
GFP_KERNEL);
if (!dp)
return -ENOMEM;
/*
* We just use the drvdata until driver run into component
* add function, and then we would set drvdata to null, so
* that analogix dp driver would take charge of the drvdata.
*/
platform_set_drvdata(pdev, dp);
/* This is for the backward compatibility. */
np = of_parse_phandle(dev->of_node, "panel", 0);
if (np) {
dp->plat_data.panel = of_drm_find_panel(np);
of_node_put(np);
if (!dp->plat_data.panel)
return -EPROBE_DEFER;
goto out;
}
endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
if (endpoint) {
np = of_graph_get_remote_port_parent(endpoint);
if (np) {
/* The remote port can be either a panel or a bridge */
dp->plat_data.panel = of_drm_find_panel(np);
if (!dp->plat_data.panel) {
dp->ptn_bridge = of_drm_find_bridge(np);
if (!dp->ptn_bridge) {
of_node_put(np);
return -EPROBE_DEFER;
}
}
of_node_put(np);
} else {
DRM_ERROR("no remote endpoint device node found.\n");
return -EINVAL;
}
} else {
DRM_ERROR("no port endpoint subnode found.\n");
return -EINVAL;
}
out:
return component_add(&pdev->dev, &exynos_dp_ops);
}
static int exynos_dp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *panel_node, *bridge_node, *endpoint;
struct exynos_dp_device *dp;
int ret;
dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
GFP_KERNEL);
if (!dp)
return -ENOMEM;
dp->display.type = EXYNOS_DISPLAY_TYPE_LCD;
dp->display.ops = &exynos_dp_display_ops;
platform_set_drvdata(pdev, dp);
ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR,
dp->display.type);
if (ret)
return ret;
panel_node = of_parse_phandle(dev->of_node, "panel", 0);
if (panel_node) {
dp->panel = of_drm_find_panel(panel_node);
of_node_put(panel_node);
if (!dp->panel)
return -EPROBE_DEFER;
}
endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
if (endpoint) {
bridge_node = of_graph_get_remote_port_parent(endpoint);
if (bridge_node) {
dp->bridge = of_drm_find_bridge(bridge_node);
of_node_put(bridge_node);
if (!dp->bridge)
return -EPROBE_DEFER;
} else
return -EPROBE_DEFER;
}
ret = component_add(&pdev->dev, &exynos_dp_ops);
if (ret)
exynos_drm_component_del(&pdev->dev,
EXYNOS_DEVICE_TYPE_CONNECTOR);
return ret;
}
int rcar_du_hdmienc_init(struct rcar_du_device *rcdu,
struct rcar_du_encoder *renc, struct device_node *np)
{
struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
struct drm_bridge *bridge;
struct rcar_du_hdmienc *hdmienc;
int ret;
hdmienc = devm_kzalloc(rcdu->dev, sizeof(*hdmienc), GFP_KERNEL);
if (hdmienc == NULL)
return -ENOMEM;
/* Locate the DRM bridge from the HDMI encoder DT node. */
bridge = of_drm_find_bridge(np);
if (!bridge)
return -EPROBE_DEFER;
ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
DRM_MODE_ENCODER_TMDS, NULL);
if (ret < 0)
return ret;
drm_encoder_helper_add(encoder, &encoder_helper_funcs);
renc->hdmi = hdmienc;
hdmienc->renc = renc;
/* Link the bridge to the encoder. */
bridge->encoder = encoder;
encoder->bridge = bridge;
ret = drm_bridge_attach(rcdu->ddev, bridge);
if (ret) {
drm_encoder_cleanup(encoder);
return ret;
}
return 0;
}
int tilcdc_attach_external_device(struct drm_device *ddev)
{
struct tilcdc_drm_private *priv = ddev->dev_private;
struct device_node *remote_node;
struct drm_bridge *bridge;
int ret;
remote_node = tilcdc_get_remote_node(ddev->dev->of_node);
if (!remote_node)
return 0;
bridge = of_drm_find_bridge(remote_node);
of_node_put(remote_node);
if (!bridge)
return -EPROBE_DEFER;
priv->external_encoder = devm_kzalloc(ddev->dev,
sizeof(*priv->external_encoder),
GFP_KERNEL);
if (!priv->external_encoder)
return -ENOMEM;
ret = drm_encoder_init(ddev, priv->external_encoder,
&tilcdc_external_encoder_funcs,
DRM_MODE_ENCODER_NONE, NULL);
if (ret) {
dev_err(ddev->dev, "drm_encoder_init() failed %d\n", ret);
return ret;
}
ret = tilcdc_attach_bridge(ddev, bridge);
if (ret)
drm_encoder_cleanup(priv->external_encoder);
return ret;
}
static int fsl_dcu_attach_endpoint(struct fsl_dcu_drm_device *fsl_dev,
const struct of_endpoint *ep)
{
struct drm_bridge *bridge;
struct device_node *np;
np = of_graph_get_remote_port_parent(ep->local_node);
fsl_dev->connector.panel = of_drm_find_panel(np);
if (fsl_dev->connector.panel) {
of_node_put(np);
return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
}
bridge = of_drm_find_bridge(np);
of_node_put(np);
if (!bridge)
return -ENODEV;
fsl_dev->encoder.bridge = bridge;
bridge->encoder = &fsl_dev->encoder;
return drm_bridge_attach(fsl_dev->drm, bridge);
}
static int rcar_lvds_parse_dt(struct rcar_lvds *lvds)
{
struct device_node *local_output = NULL;
struct device_node *remote_input = NULL;
struct device_node *remote = NULL;
struct device_node *node;
bool is_bridge = false;
int ret = 0;
local_output = of_graph_get_endpoint_by_regs(lvds->dev->of_node, 1, 0);
if (!local_output) {
dev_dbg(lvds->dev, "unconnected port@1\n");
return -ENODEV;
}
/*
* Locate the connected entity and infer its type from the number of
* endpoints.
*/
remote = of_graph_get_remote_port_parent(local_output);
if (!remote) {
dev_dbg(lvds->dev, "unconnected endpoint %pOF\n", local_output);
ret = -ENODEV;
goto done;
}
if (!of_device_is_available(remote)) {
dev_dbg(lvds->dev, "connected entity %pOF is disabled\n",
remote);
ret = -ENODEV;
goto done;
}
remote_input = of_graph_get_remote_endpoint(local_output);
for_each_endpoint_of_node(remote, node) {
if (node != remote_input) {
/*
* We've found one endpoint other than the input, this
* must be a bridge.
*/
is_bridge = true;
of_node_put(node);
break;
}
}
if (is_bridge) {
lvds->next_bridge = of_drm_find_bridge(remote);
if (!lvds->next_bridge)
ret = -EPROBE_DEFER;
} else {
lvds->panel = of_drm_find_panel(remote);
if (!lvds->panel)
ret = -EPROBE_DEFER;
}
done:
of_node_put(local_output);
of_node_put(remote_input);
of_node_put(remote);
return ret;
}
static int exynos_dp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = NULL, *endpoint = NULL;
struct exynos_dp_device *dp;
int ret;
dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
GFP_KERNEL);
if (!dp)
return -ENOMEM;
platform_set_drvdata(pdev, dp);
/* This is for the backward compatibility. */
np = of_parse_phandle(dev->of_node, "panel", 0);
if (np) {
dp->panel = of_drm_find_panel(np);
of_node_put(np);
if (!dp->panel)
return -EPROBE_DEFER;
goto out;
}
endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
if (endpoint) {
np = of_graph_get_remote_port_parent(endpoint);
if (np) {
/* The remote port can be either a panel or a bridge */
dp->panel = of_drm_find_panel(np);
if (!dp->panel) {
dp->ptn_bridge = of_drm_find_bridge(np);
if (!dp->ptn_bridge) {
of_node_put(np);
return -EPROBE_DEFER;
}
}
of_node_put(np);
} else {
DRM_ERROR("no remote endpoint device node found.\n");
return -EINVAL;
}
} else {
DRM_ERROR("no port endpoint subnode found.\n");
return -EINVAL;
}
out:
pm_runtime_enable(dev);
ret = component_add(&pdev->dev, &exynos_dp_ops);
if (ret)
goto err_disable_pm_runtime;
return ret;
err_disable_pm_runtime:
pm_runtime_disable(dev);
return ret;
}
