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genode_c_api: do not match HID in AUDIO devices

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Now, USB audio class devices become available in Sculpt, e.g., for vbox
passthrough, and are not automatically grabbed by the usb_hid class=3
policy. In the future, interface/endpoint level policies will enable
driving the HID interface only from usb_hid while a usb_audio driver
controls the rest of the device.
This commit is contained in:
Christian Helmuth 2024-07-26 09:44:06 +02:00
parent 91e81591fe
commit d40f9b712e
1 changed files with 8 additions and 1 deletions
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9
repos/os/src/lib/genode_c_api/usb.cc
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@ -1097,14 +1097,21 @@ void Session_component::_device_policy(genode_usb_device const &d,
(product == d.desc.product_id)) ||
(d.label() == label));
enum { CLASS_AUDIO = 0x1, CLASS_HID = 0x3 };
if (!match) {
uint8_t cla = node.attribute_value<uint8_t>("class", 0);
bool found_audio = false;
d.configs.for_each([&] (genode_usb_configuration const &c) {
if (!c.active)
return;
c.interfaces.for_each([&] (genode_usb_interface const &i) {
if (i.desc.iclass == cla) match = true; });
if (i.desc.iclass == cla) match = true;
if (i.desc.iclass == CLASS_AUDIO) found_audio = true;
});
});
/* do not match HID in AUDIO devices */
if (match && cla == CLASS_HID && found_audio)
match = false;
}
if (match) fn(node);