linux-kernel - [PATCH 4.19 271/280] drm/amd/powerplay: correct power reading on fiji

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Date:   Fri, 22 Mar 2019 12:17:04 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Evan Quan <evan.quan@....com>,
        Feifei Xu <Feifei.Xu@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 4.19 271/280] drm/amd/powerplay: correct power reading on fiji

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Evan Quan <evan.quan@....com>

commit f5742ec36422a39b57f0256e4847f61b3c432f8c upstream.

Set sampling period as 500ms to provide a smooth power
reading output. Also, correct the register for power
reading.

Signed-off-by: Evan Quan <evan.quan@....com>
Reviewed-by: Feifei Xu <Feifei.Xu@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
@@ -3487,14 +3487,14 @@ static int smu7_get_gpu_power(struct pp_
 
 	smum_send_msg_to_smc(hwmgr, PPSMC_MSG_PmStatusLogStart);
 	cgs_write_ind_register(hwmgr->device, CGS_IND_REG__SMC,
-							ixSMU_PM_STATUS_94, 0);
+							ixSMU_PM_STATUS_95, 0);
 
 	for (i = 0; i < 10; i++) {
-		mdelay(1);
+		mdelay(500);
 		smum_send_msg_to_smc(hwmgr, PPSMC_MSG_PmStatusLogSample);
 		tmp = cgs_read_ind_register(hwmgr->device,
 						CGS_IND_REG__SMC,
-						ixSMU_PM_STATUS_94);
+						ixSMU_PM_STATUS_95);
 		if (tmp != 0)
 			break;
 	}