[AMD Public Use] -----Original Message----- From: Jaroslav Kysela <perex@xxxxxxxx> Sent: Wednesday, November 18, 2020 2:37 PM To: Mukunda, Vijendar <Vijendar.Mukunda@xxxxxxx> Cc: ALSA development <alsa-devel@xxxxxxxxxxxxxxxx> Subject: snd-rn-pci-acp3x - auto dmic detection unreliable Hi, it seems that the ACPI auto-detection of the presence the digital microphone connected to AMD Renoir audio bridge is unreliable. It may be that hardware vendors do not provide the correct ACPI tables. Could you clarify the usage of _WOV integer value? It seems that this value is set on those plaforms which do not have the digital microphone (the microphone is connected to the HDA codec): _WOV integer value should be set only when DMIC is connected to APU. When DMIC is not available, _WOV integer value should be set to zero by BIOS. Lenovo IdeaPad 5 (15ARE05) Lenovo Thinkpad X395 In any case, we should probably improve the auto-detection using DMI or other platform info. Jaroslav BugLink: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.redhat.com%2Fshow_bug.cgi%3Fid%3D1892115&data=04%7C01%7CVijendar.Mukunda%40amd.com%7C4d901531b6454bebc58208d88ba15a4b%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637412872412887848%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=S7769uYGT3db%2BaztzZyobmVN2leseXPqjR6pktFUaR0%3D&reserved=0 -- Jaroslav Kysela <perex@xxxxxxxx> Linux Sound Maintainer; ALSA Project; Red Hat, Inc.
