[PATCH v5 09/10] drm/bridge: ch7033: Switch to use fwnode based APIs

Sui Jingfeng
2024-05-03T16:42:02Z

Use the freshly created helper to replace the use of DT-dependent APIs,
also print error log if the fwnode graph is not complete which is benefit
to debug.

Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
---
drivers/gpu/drm/bridge/chrontel-ch7033.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/chrontel-ch7033.c b/drivers/gpu/drm/bridge/chrontel-ch7033.c
index c83486cf6b15..d856ad0987cc 100644
--- a/drivers/gpu/drm/bridge/chrontel-ch7033.c
+++ b/drivers/gpu/drm/bridge/chrontel-ch7033.c
@@ -531,6 +531,7 @@ static const struct regmap_config ch7033_regmap_config = {
static int ch7033_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
+ struct fwnode_handle *fwnode = dev_fwnode(dev);
struct ch7033_priv *priv;
unsigned int val;
int ret;
@@ -541,10 +542,15 @@ static int ch7033_probe(struct i2c_client *client)

dev_set_drvdata(dev, priv);

- ret = drm_of_find_panel_or_bridge(dev->of_node, 1, -1, NULL,
- &priv->next_bridge);
- if (ret)
+ priv->next_bridge = drm_bridge_find_next_bridge_by_fwnode(fwnode, 1);
+ if (IS_ERR(priv->next_bridge)) {
+ ret = PTR_ERR(priv->next_bridge);
+ dev_err(dev, "Error in founding the next bridge: %d\n", ret);
return ret;
+ } else if (!priv->next_bridge) {
+ dev_dbg(dev, "Next bridge not found, deferring probe\n");
+ return -EPROBE_DEFER;
+ }

priv->regmap = devm_regmap_init_i2c(client, &ch7033_regmap_config);
if (IS_ERR(priv->regmap)) {
@@ -575,7 +581,7 @@ static int ch7033_probe(struct i2c_client *client)

INIT_LIST_HEAD(&priv->bridge.list);
priv->bridge.funcs = &ch7033_bridge_funcs;
- priv->bridge.of_node = dev->of_node;
+ drm_bridge_set_node(&priv->bridge, fwnode);
drm_bridge_add(&priv->bridge);

dev_info(dev, "Chrontel CH7033 Video Encoder\n");
--
2.34.1