Hi Sylwester, Guennadi,
I am working on adding DT support for VPIF driver, initially to get
some hands dirty
on working on Capture driver and later will move ahead to add for the display.
I have added asynchronous probing support for the both the bridge and subdevs
which works perfectly like on a charm with passing pdata as usually,
but doing the
same with DT I have few doubts on building the pdata in the bridge driver.
This is a snippet of my subdes in i2c node:-
i2c0: i2c@1c22000 {
status = "okay";
clock-frequency = <100000>;
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins>;
tvp514x@5c {
compatible = "ti,tvp5146";
reg = <0x5c>;
port {
tvp514x_1: endpoint {
remote-endpoint =
<&vpif_capture0_1>;
hsync-active = <1>;
vsync-active = <1>;
pclk-sample = <0>;
};
};
};
tvp514x@5d {
compatible = "ti,tvp5146";
reg = <0x5d>;
port {
tvp514x_2: endpoint {
remote-endpoint =
<&vpif_capture0_0>;
hsync-active = <1>;
vsync-active = <1>;
pclk-sample = <0>;
};
};
};
......
};
Here tvp514x are the subdevs the platform has two of them one at 0x5c and 0x5d,
so I have added two nodes for them.
Following is DT node for the bridge driver:-
vpif_capture@0 {
status = "okay";
port {
vpif_capture0_1: endpoint@1 {
remote = <&tvp514x_1>;
};
vpif_capture0_0: endpoint@0 {
remote = <&tvp514x_2>;
};
};
};
I have added two endpoints for the bridge driver. In the bridge driver
to build the pdata from DT node,I do the following,
np = v4l2_of_get_next_endpoint(pdev->dev.of_node, NULL);
The above will give the first endpoint ie, endpoint@1
>From here is it possible to get the tvp514x_1 endpoint node and the
parent of it?
so that I build the asynchronous subdev list for the bridge driver.
+static struct v4l2_async_subdev tvp1_sd = {
+ .hw = {
+ .bus_type = V4L2_ASYNC_BUS_I2C,
+ .match.i2c = {
+ .adapter_id = 1,
+ .address = 0x5c,
+ },
+ },
+};
For building the asd subdev list in the bridge driver I can get the
address easily,
how do I get the adapter_id ? should this be a property subdev ? And also same
with bustype.
Regards,
--Prabhakar
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