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drv/intel/gma/opregion: Add method to restore ASLS 

Add a new method to restore ASLS on S3 resume.
Use new interface introduced in last commit.

Change-Id: I254683081cbaf3a5938794dcba140ac9ee07f48a
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/20436
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Patrick Rudolph 2017-06-30 15:18:23 +02:00
parent 19c2ad8758
commit bac23033d3
2 changed files with 17 additions and 0 deletions
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16
src/drivers/intel/gma/opregion.c
View File

@ -18,6 +18,8 @@
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <console/console.h>
#include <cbmem.h>
#include "opregion.h"
/* Write ASLS PCI register and prepare SWSCI register. */
@ -46,3 +48,17 @@ void intel_gma_opregion_register(uintptr_t opregion)
reg16 |= SMISCISEL;
pci_write_config16(igd, SWSCI, reg16);
}
/* Restore ASLS register on S3 resume and prepare SWSCI. */
void intel_gma_restore_opregion(void)
{
if (acpi_is_wakeup_s3()) {
const void *const gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
uintptr_t aslb;
if (gnvs && (aslb = gma_get_gnvs_aslb(gnvs)))
intel_gma_opregion_register(aslb);
else
printk(BIOS_ERR, "Error: GNVS or ASLB not set.\n");
}
}

1
src/drivers/intel/gma/opregion.h
View File

@ -246,6 +246,7 @@ typedef struct {
} __attribute__((packed)) optionrom_vbt_t;
void intel_gma_opregion_register(uintptr_t opregion);
void intel_gma_restore_opregion(void);
uintptr_t gma_get_gnvs_aslb(const void *gnvs);
void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb);