commit b89c71d1eb1c43c6c61f6d74d7454702d367f18b
author Rex Zhu <Rex.Zhu@amd.com> Wed Apr 04 14:17:09 2018 +0800
committer Alex Deucher <alexander.deucher@amd.com> Tue May 15 13:43:17 2018 -0500
tree af713e0a2d9680e7b704291142a1340e29ee3558
parent a0701722b68e69443dd3dd7970a9f343b7560a2c

drm/amd/pp: Refine get_gpu_power for VI

pkgpwr is the average gpu power of 100ms. it is calculated by
firmware in real time.

1. we can send smu message PPSMC_MSG_GetCurrPkgPwr to read currentpkgpwr directly.

2. On Fiji/tonga/bonaire/hawwii, without PPSMC_MSG_GetCurrPkgPwr support.
   Send PPSMC_MSG_PmStatusLogStart/Sample to let smu write currentpkgpwr
   to ixSMU_PM_STATUS_94. driver can read pkgpwr from ixSMU_PM_STATUS_94.

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
index 5bccf89..51867c7 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
@@ -3359,30 +3359,33 @@ static int smu7_get_pp_table_entry(struct pp_hwmgr *hwmgr,
 static int smu7_get_gpu_power(struct pp_hwmgr *hwmgr,
 		struct pp_gpu_power *query)
 {
-	PP_ASSERT_WITH_CODE(!smum_send_msg_to_smc(hwmgr,
-			PPSMC_MSG_PmStatusLogStart),
-			"Failed to start pm status log!",
-			return -1);
+	int i;
 
-	msleep_interruptible(20);
+	if (!query)
+		return -EINVAL;
 
-	PP_ASSERT_WITH_CODE(!smum_send_msg_to_smc(hwmgr,
-			PPSMC_MSG_PmStatusLogSample),
-			"Failed to sample pm status log!",
-			return -1);
 
-	query->vddc_power = cgs_read_ind_register(hwmgr->device,
-			CGS_IND_REG__SMC,
-			ixSMU_PM_STATUS_40);
-	query->vddci_power = cgs_read_ind_register(hwmgr->device,
-			CGS_IND_REG__SMC,
-			ixSMU_PM_STATUS_49);
-	query->max_gpu_power = cgs_read_ind_register(hwmgr->device,
-			CGS_IND_REG__SMC,
-			ixSMU_PM_STATUS_94);
-	query->average_gpu_power = cgs_read_ind_register(hwmgr->device,
-			CGS_IND_REG__SMC,
-			ixSMU_PM_STATUS_95);
+	memset(query, 0, sizeof *query);
+
+	smum_send_msg_to_smc_with_parameter(hwmgr, PPSMC_MSG_GetCurrPkgPwr, 0);
+	query->average_gpu_power = cgs_read_register(hwmgr->device, mmSMC_MSG_ARG_0);
+
+	if (query->average_gpu_power != 0)
+		return 0;
+
+	smum_send_msg_to_smc(hwmgr, PPSMC_MSG_PmStatusLogStart);
+	cgs_write_ind_register(hwmgr->device, CGS_IND_REG__SMC,
+							ixSMU_PM_STATUS_94, 0);
+
+	for (i = 0; i < 20; i++) {
+		mdelay(1);
+		smum_send_msg_to_smc(hwmgr, PPSMC_MSG_PmStatusLogSample);
+		query->average_gpu_power = cgs_read_ind_register(hwmgr->device,
+						CGS_IND_REG__SMC,
+						ixSMU_PM_STATUS_94);
+		if (query->average_gpu_power != 0)
+			break;
+	}
 
 	return 0;
 }