diff options
| author | Angel Pons <th3fanbus@gmail.com> | 2021-03-22 14:21:28 +0100 |
|---|---|---|
| committer | Angel Pons <th3fanbus@gmail.com> | 2021-04-19 19:02:08 +0000 |
| commit | b922cbbdd6bad68f9d3c6f1c6de6b557646c5dbb (patch) | |
| tree | f0276140e4621d2adc18de96e23b7434b466fbff /src/device/Kconfig | |
| parent | 6b89746644c173a2fbba4d9a4308f2b07c903575 (diff) | |
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>
Diffstat (limited to 'src/device/Kconfig')
| -rw-r--r-- | src/device/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/device/Kconfig b/src/device/Kconfig index 63b7d6c9ee..5ae3466d32 100644 --- a/src/device/Kconfig +++ b/src/device/Kconfig @@ -527,6 +527,15 @@ config AZALIA_MAX_CODECS help The maximum number of codecs supported on a single HD Audio controller. +config AZALIA_LOCK_DOWN_R_WO_GCAP + def_bool n + depends on AZALIA_PLUGIN_SUPPORT + help + The GCAP register is implemented as R/WO (Read / Write Once) on some + HD Audio controllers, such as Intel 6-series PCHs. Select this option + to lock down the GCAP register after deasserting the controller reset + bit. Locking is done by reading GCAP and writing back the read value. + config PCIEXP_PLUGIN_SUPPORT bool default y |