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Commit d7bff772 authored by Vijayavardhan Vennapusa's avatar Vijayavardhan Vennapusa Committed by Gerrit - the friendly Code Review server
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f_audio_source: Implement get_alt() support 



Implement get_alt() callback which is required to support multiple
alternate settings of audio_source interface.

Change-Id: Id857af047759687ae2d626839b2dd31ad59db452
Signed-off-by: default avatarVijayavardhan Vennapusa <vvreddy@codeaurora.org>
parent c2c950b4

drivers/usb/gadget/function/f_audio_source.c

+27 −2
Original line number Diff line number Diff line
@@ -591,14 +591,38 @@ static int audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt) 


	pr_debug("audio_set_alt intf %d, alt %d\n", intf, alt);



	if (!alt) {

		usb_ep_disable(audio->in_ep);

		return 0;

	}



	ret = config_ep_by_speed(cdev->gadget, f, audio->in_ep);

	if (ret)

	if (ret) {

		audio->in_ep->desc = NULL;

		pr_err("config_ep fail for audio ep ret %d\n", ret);

		return ret;

	}

	ret = usb_ep_enable(audio->in_ep);

	if (ret) {

		audio->in_ep->desc = NULL;

		pr_err("failed to enable audio ret %d\n", ret);

		return ret;

	}



	usb_ep_enable(audio->in_ep);

	return 0;

}



/*

 * Because the data interface supports multiple altsettings,

 * this audio_source function *MUST* implement a get_alt() method.

 */

static int audio_get_alt(struct usb_function *f, unsigned int intf)

{

	struct audio_dev	*audio = func_to_audio(f);



	return audio->in_ep->enabled ? 1 : 0;

}



static void audio_disable(struct usb_function *f)

{

	struct audio_dev	*audio = func_to_audio(f);
@@ -862,6 +886,7 @@ static struct audio_dev _audio_dev = { 
		.bind = audio_bind,

		.unbind = audio_unbind,

		.set_alt = audio_set_alt,

		.get_alt = audio_get_alt,

		.setup = audio_setup,

		.disable = audio_disable,

		.free_func = audio_free_func,