On Tue, 2016-11-15 at 16:02 +0800, mengdong.lin@xxxxxxxxxxxxxxx wrote:
> From: Mengdong Lin <mengdong.lin@xxxxxxxxxxxxxxx>
>
> A machine device's verb file (e.g.HiFi) can include configuration files
> of component devices via alsaconf syntax <searchdir:xxx> and <file_name>.
> Then the machine device's sequence can enable or disable a component
> device by keyword 'enadev' and 'disdev' followed the name of the component
> device.
>
> UCM sequence parser will find the component device and mark if its enable
> or disable sequence is needed by the parent, the machine device.
>
> New element type and struct are defined for the sequence of a component
> device. Component devices will be removed from the machine device list
> 'device_list' of a verb, since we don't want to expose them to audio
> servers with original API to list devices for backward compatibility.
> A new list 'cmpt_device_list' is used for the component devices of a verb.
>
> Signed-off-by: Mengdong Lin <mengdong.lin@xxxxxxxxxxxxxxx>
>
> @@ -306,6 +381,30 @@ static int parse_sequence(snd_use_case_mgr_t *uc_mgr ATTRIBUTE_UNUSED,
> continue;
> }
>
> + if (strcmp(cmd, "enadev") == 0) {
> + /* need to enable a component device */
> + curr->type = SEQUENCE_ELEMENT_TYPE_CMPT_SEQ;
> + err = parse_component_seq(uc_mgr, n, 1,
> + &curr->data.cmpt_seq);
> + if (err < 0) {
> + uc_error("error: enadev requires a valid device!");
> + return err;
> + }
> + continue;
> + }
> +
> + if (strcmp(cmd, "disdev") == 0) {
Do we need to document enadev and disdev anywhere ?
Liam
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