ALSA: hda: Force MSI for Hygon H34M51A board

The Hygon HDA controller (PCI 1d94:14a9) has AZX_DCAPS_NO_MSI set in
the PCI ID table to use legacy INTx, as MSI may lose interrupts under
heavy load on some Hygon platforms (commit 41212ff3e4ed ("ALSA: hda:
Add support for Hygon family 18h model 5h HD-Audio")).

However, on the Kunlun H34M51A board (PCI subsystem 1d94:c950) the
INTx interrupt line is not wired.  /proc/interrupts shows zero count
for the HDA IRQ from boot, so the RIRB interrupt handler is never
called.  Without RIRB processing, azx_rirb_get_response() times out
after 1 s, switches to polling mode, and the resulting slow codec
communication delays card registration by ~20 s and breaks
unsolicited jack-detection event delivery.

Force MSI on for subsystem 1d94:c950 by adding it to msi_deny_list
with value 1.  The list is consulted in check_msi() before the
AZX_DCAPS_NO_MSI check, so H34M51A gets MSI enabled while other
Hygon platforms retain INTx.

Signed-off-by: renpanpan <renpanpan@kylinos.cn>
Link: https://patch.msgid.link/20261022085438.1315679-1-rppxj178543@163.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

0 files changed, 0 insertions, 0 deletions