Change in coreboot[master]: intelblocks/pep: Handle TBT displays on s0ix transition

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/63980 )

Change subject: intelblocks/pep: Handle TBT displays on s0ix transition
......................................................................

intelblocks/pep: Handle TBT displays on s0ix transition

Notify IOM to enable or disable TBT displays on S0ix exit and entry
respectively.

Change-Id: I9f49d8e30fe8e8b335128e53d71ef902328f031a
Signed-off-by: Michał Kopeć 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63980
Tested-by: build bot (Jenkins) 
Reviewed-by: Krystian Hebel 
Reviewed-by: Angel Pons 
---
M src/soc/intel/common/block/acpi/pep.c
1 file changed, 12 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Angel Pons: Looks good to me, but someone else must approve
  Krystian Hebel: Looks good to me, approved

diff --git a/src/soc/intel/common/block/acpi/pep.c b/src/soc/intel/common/block/acpi/pep.c
index 1399438..8028b81 100644
--- a/src/soc/intel/common/block/acpi/pep.c
+++ b/src/soc/intel/common/block/acpi/pep.c
@@ -17,6 +17,8 @@
 #define MAINBOARD_DISPLAY_HOOK		"\_SB.MDSX"
 #define ENABLE_PM_BITS_HOOK		"\_SB.PCI0.EGPM"
 #define RESTORE_PM_BITS_HOOK		"\_SB.PCI0.RGPM"
+#define THUNDERBOLT_DEVICE		"\_SB.PCI0.TXHC"
+#define THUNDERBOLT_IOM_DPOF		"\_SB.PCI0.DPOF"
 #define LPI_STATES_ALL			0xff
 #define MIN_DEVICE_STATE		ACPI_DEVICE_SLEEP_D0
 #define PEPD_SCOPE			"\_SB.PCI0"
@@ -129,6 +131,11 @@
    acpigen_write_if_cond_ref_of(ENABLE_PM_BITS_HOOK);
    acpigen_emit_namestring(ENABLE_PM_BITS_HOOK);
    acpigen_write_if_end();
+
+	/* Handle Thunderbolt displays */
+	acpigen_write_if_cond_ref_of(THUNDERBOLT_DEVICE);
+	acpigen_write_store_int_to_namestr(1, THUNDERBOLT_IOM_DPOF);
+	acpigen_write_if_end();
 }

static void lpi_s0ix_exit(void *unused)
@@ -149,6 +156,11 @@
    acpigen_write_if_cond_ref_of(RESTORE_PM_BITS_HOOK);
    acpigen_emit_namestring(RESTORE_PM_BITS_HOOK);
    acpigen_write_if_end();
+
+	/* Handle Thunderbolt displays */
+	acpigen_write_if_cond_ref_of(THUNDERBOLT_DEVICE);
+	acpigen_write_store_int_to_namestr(0, THUNDERBOLT_IOM_DPOF);
+	acpigen_write_if_end();
 }

static void lpi_display_on(void *unused)