[v4,1/9] gpu: drm: replace of_graph_get_next_endpoint()
Commit Message
From DT point of view, in general, drivers should be asking for a
specific port number because their function is fixed in the binding.
of_graph_get_next_endpoint() doesn't match to this concept.
Simply replace
- of_graph_get_next_endpoint(xxx, NULL);
+ of_graph_get_endpoint_by_regs(xxx, 0, -1);
Link: https://lore.kernel.org/r/20240202174941.GA310089-robh@kernel.org
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
drivers/gpu/drm/drm_of.c | 4 +++-
drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 2 +-
drivers/gpu/drm/tiny/arcpgu.c | 2 +-
3 files changed, 5 insertions(+), 3 deletions(-)
@@ -504,6 +504,8 @@ EXPORT_SYMBOL_GPL(drm_of_get_data_lanes_count_ep);
* Gets parent DSI bus for a DSI device controlled through a bus other
* than MIPI-DCS (SPI, I2C, etc.) using the Device Tree.
*
+ * This function assumes that the device's port@0 is the DSI input.
+ *
* Returns pointer to mipi_dsi_host if successful, -EINVAL if the
* request is unsupported, -EPROBE_DEFER if the DSI host is found but
* not available, or -ENODEV otherwise.
@@ -516,7 +518,7 @@ struct mipi_dsi_host *drm_of_get_dsi_bus(struct device *dev)
/*
* Get first endpoint child from device.
*/
- endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+ endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
if (!endpoint)
return ERR_PTR(-ENODEV);
@@ -400,7 +400,7 @@ static int rpi_touchscreen_probe(struct i2c_client *i2c)
rpi_touchscreen_i2c_write(ts, REG_POWERON, 0);
/* Look up the DSI host. It needs to probe before we do. */
- endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+ endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
if (!endpoint)
return -ENODEV;
@@ -288,7 +288,7 @@ static int arcpgu_load(struct arcpgu_drm_private *arcpgu)
* There is only one output port inside each device. It is linked with
* encoder endpoint.
*/
- endpoint_node = of_graph_get_next_endpoint(pdev->dev.of_node, NULL);
+ endpoint_node = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 0, -1);
if (endpoint_node) {
encoder_node = of_graph_get_remote_port_parent(endpoint_node);
of_node_put(endpoint_node);