[PATCH] drm/amd/powerplay: Add notify PWE function to SMU10

[mikita.lipski at amd.com]

From: Mikita Lipski <mikita.lipski at amd.com>

Functionality to message smc to enable pwe after gpu suspense.
It is used in case when display resumes from S3 and wants to start
audio driver by enabling pwe.

Signed-off-by: Mikita Lipski <mikita.lipski at amd.com>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c | 8 ++++++++
 drivers/gpu/drm/amd/powerplay/inc/hwmgr.h         | 1 +
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
index 8b75f52..2f69bfa 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
@@ -1113,6 +1113,13 @@ static int smu10_set_watermarks_for_clocks_ranges(struct pp_hwmgr *hwmgr,
 	data->water_marks_exist = true;
 	return result;
 }
+
+static int smu10_smus_notify_pwe(struct pp_hwmgr *hwmgr)
+{
+
+	return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_SetRccPfcPmeRestoreRegister);
+}
+
 static int smu10_set_mmhub_powergating_by_smu(struct pp_hwmgr *hwmgr)
 {
 	return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_PowerGateMmHub);
@@ -1153,6 +1160,7 @@ static const struct pp_hwmgr_func smu10_hwmgr_funcs = {
 	.power_state_set = smu10_set_power_state_tasks,
 	.dynamic_state_management_disable = smu10_disable_dpm_tasks,
 	.set_mmhub_powergating_by_smu = smu10_set_mmhub_powergating_by_smu,
+	.smus_notify_pwe = smu10_smus_notify_pwe,
 	.gfx_off_control = smu10_gfx_off_control,
 };
 
diff --git a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
index 3d9743f..3c321c7 100644
--- a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
@@ -326,6 +326,7 @@ struct pp_hwmgr_func {
 					long *input, uint32_t size);
 	int (*set_power_limit)(struct pp_hwmgr *hwmgr, uint32_t n);
 	int (*set_mmhub_powergating_by_smu)(struct pp_hwmgr *hwmgr);
+	int (*smus_notify_pwe)(struct pp_hwmgr *hwmgr);
 };
 
 struct pp_table_func {
-- 
2.7.4