From: Evan Quan <evan.quan@amd.com>
Date: Fri, 16 Dec 2022 09:04:24 +0000 (+0800)
Subject: drm/amd/pm: correct the fan speed retrieving in PWM for some SMU13 asics
X-Git-Tag: v6.1.8~544
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=54b6a040f38075711751c61b2300a8ce7cb1741f;p=platform%2Fkernel%2Flinux-starfive.git

drm/amd/pm: correct the fan speed retrieving in PWM for some SMU13 asics

commit e73fc71e8f015d61f3adca7659cb209fd5117aa5 upstream.

For SMU 13.0.0 and 13.0.7, the output from PMFW is in percent. Driver
need to convert that into correct PMW(255) based.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.0, 6.1
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
index 7dc6a20..b843060 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
@@ -1417,12 +1417,23 @@ out:
 static int smu_v13_0_0_get_fan_speed_pwm(struct smu_context *smu,
 					 uint32_t *speed)
 {
+	int ret;
+
 	if (!speed)
 		return -EINVAL;
 
-	return smu_v13_0_0_get_smu_metrics_data(smu,
-						METRICS_CURR_FANPWM,
-						speed);
+	ret = smu_v13_0_0_get_smu_metrics_data(smu,
+					       METRICS_CURR_FANPWM,
+					       speed);
+	if (ret) {
+		dev_err(smu->adev->dev, "Failed to get fan speed(PWM)!");
+		return ret;
+	}
+
+	/* Convert the PMFW output which is in percent to pwm(255) based */
+	*speed = MIN(*speed * 255 / 100, 255);
+
+	return 0;
 }
 
 static int smu_v13_0_0_get_fan_speed_rpm(struct smu_context *smu,
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
index 88b37ad..2229243 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
@@ -1361,12 +1361,23 @@ static int smu_v13_0_7_populate_umd_state_clk(struct smu_context *smu)
 static int smu_v13_0_7_get_fan_speed_pwm(struct smu_context *smu,
 					 uint32_t *speed)
 {
+	int ret;
+
 	if (!speed)
 		return -EINVAL;
 
-	return smu_v13_0_7_get_smu_metrics_data(smu,
-						METRICS_CURR_FANPWM,
-						speed);
+	ret = smu_v13_0_7_get_smu_metrics_data(smu,
+					       METRICS_CURR_FANPWM,
+					       speed);
+	if (ret) {
+		dev_err(smu->adev->dev, "Failed to get fan speed(PWM)!");
+		return ret;
+	}
+
+	/* Convert the PMFW output which is in percent to pwm(255) based */
+	*speed = MIN(*speed * 255 / 100, 255);
+
+	return 0;
 }
 
 static int smu_v13_0_7_get_fan_speed_rpm(struct smu_context *smu,