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authorAngel Pons <th3fanbus@gmail.com>2024-06-26 11:29:24 +0200
committerFelix Held <felix-coreboot@felixheld.de>2024-06-28 12:26:07 +0000
commit4bdb089147b7cfa3ab52de7449e7fba82672a080 (patch)
treef3c074daeb982201515a67a413bf30187a6c94e8 /src/soc/intel/skylake/lpc.c
parent2eb9d5ed62d3c3a4484c686af12d29a390ccf963 (diff)
device/azalia_device.c: Always read-write GCAP
In the HD Audio Specification Rev. 1.0a, every bitfield in the GCAP register is RO (Read Only). However, it is known that in some Intel PCHs (e.g 6-series and 7-series, documents 324645 and 326776), some of the bitfields in the GCAP register are R/WO (Read / Write Once). GCAP is RO on 5-series PCHs; 8-series and 9-series PCHs have a lock bit for GCAP elsewhere. Lock GCAP by reading GCAP and writing back the same value. This has no effect on platforms that implement GCAP as a RO register or lock GCAP through a different mechanism. Change-Id: Id61e6976a455273e8c681dbeb4bad35d57b1a8a2 Signed-off-by: Angel Pons <th3fanbus@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/83218 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
Diffstat (limited to 'src/soc/intel/skylake/lpc.c')
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