tree f0276140e4621d2adc18de96e23b7434b466fbff
parent 6b89746644c173a2fbba4d9a4308f2b07c903575
author Angel Pons <th3fanbus@gmail.com> 1616419288 +0100
committer Angel Pons <th3fanbus@gmail.com> 1618858928 +0000

device/azalia_device.c: Add option to lock down GCAP

On Intel 6-series PCHs, the GCAP register is R/WO (Read / Write Once),
and needs to be written to after the HD Audio controller is taken out
of reset. Add a Kconfig option to read and write back GCAP in order to
lock it down. Follow-up commits will select this option when switching
platforms to use common Azalia code, to preserve original behaviour.

Change-Id: I70bab20816fb6c0bf7bff35c3d2f5828cd96172d
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50794
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>