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| author | Matt DeVillier <matt.devillier@gmail.com> | 2017-07-01 13:02:47 -0500 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2018-03-30 07:20:38 +0000 |
| commit | 132bbe6be537b5cb8e827e01f28086d3e3ce6677 (patch) | |
| tree | 1ddef6690707b17c224430a4ce39878f8abbb922 /src/soc/intel/braswell/acpi.c | |
| parent | c7edf18f7c763762676eeb3bad084cd4c032cfcf (diff) | |
| download | coreboot-132bbe6be537b5cb8e827e01f28086d3e3ce6677.tar.xz | |
soc/intel/braswell: Save/restore GMA OpRegion address
Add global/ACPI nvs variables required for IGD OpRegion.
Add functions necessary to save the ACPI OpRegion table
address in ASLB, and restore table address upon S3 resume.
Implementation modeled on existing Baytrail code.
Test: boot Windows 10 on google/edgar with Tianocore payload and
GOP display init, observe display driver loaded and functional,
display not black screen when resuming from S3 suspend.
Change-Id: I7c1fbf818510949420f70e93ed4780e94e598508
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/25197
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Diffstat (limited to 'src/soc/intel/braswell/acpi.c')
| -rw-r--r-- | src/soc/intel/braswell/acpi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/soc/intel/braswell/acpi.c b/src/soc/intel/braswell/acpi.c index 61ad03d388..9ac5574c6f 100644 --- a/src/soc/intel/braswell/acpi.c +++ b/src/soc/intel/braswell/acpi.c @@ -486,6 +486,7 @@ unsigned long southcluster_write_acpi_tables(device_t device, struct acpi_rsdp *rsdp) { acpi_header_t *ssdt2; + global_nvs_t *gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS); current = acpi_write_hpet(device, current, rsdp); current = acpi_align_current(current); @@ -496,6 +497,8 @@ unsigned long southcluster_write_acpi_tables(device_t device, printk(BIOS_DEBUG, "ACPI: * IGD OpRegion\n"); opregion = (igd_opregion_t *)current; intel_gma_init_igd_opregion(opregion); + if (gnvs) + gnvs->aslb = (u32)opregion; update_igd_opregion(opregion); current += sizeof(igd_opregion_t); current = acpi_align_current(current); |