[PATCH 2/2] drm/radeon: Add vddc hwmon sensor

[Sandeep Raghuraman <sandy.8925@xxxxxxxxx>]

Signed-off-by: Sandeep Raghuraman <sandy.8925@xxxxxxxxx>
---
 drivers/gpu/drm/radeon/radeon.h      |  1 +
 drivers/gpu/drm/radeon/radeon_asic.c |  1 +
 drivers/gpu/drm/radeon/radeon_asic.h |  1 +
 drivers/gpu/drm/radeon/radeon_pm.c   | 21 +++++++++++++++++++++
 drivers/gpu/drm/radeon/sumo_dpm.c    | 20 ++++++++++++++++++++
 5 files changed, 44 insertions(+)

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 30e32adc1fc6..ec82f22e503a 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1992,6 +1992,7 @@ struct radeon_asic {
 		int (*get_fan_speed_percent)(struct radeon_device *rdev, u32 *speed);
 		u32 (*get_current_sclk)(struct radeon_device *rdev);
 		u32 (*get_current_mclk)(struct radeon_device *rdev);
+		u16 (*get_current_vddc)(struct radeon_device *rdev);
 	} dpm;
 	/* pageflipping */
 	struct {
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 495700d16fc9..8becbe09af2f 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1513,6 +1513,7 @@ static struct radeon_asic sumo_asic = {
 		.force_performance_level = &sumo_dpm_force_performance_level,
 		.get_current_sclk = &sumo_dpm_get_current_sclk,
 		.get_current_mclk = &sumo_dpm_get_current_mclk,
+		.get_current_vddc = &sumo_dpm_get_current_vddc,
 	},
 	.pflip = {
 		.page_flip = &evergreen_page_flip,
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index a74fa18cd27b..24644daead53 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -596,6 +596,7 @@ int sumo_dpm_force_performance_level(struct radeon_device *rdev,
 				     enum radeon_dpm_forced_level level);
 u32 sumo_dpm_get_current_sclk(struct radeon_device *rdev);
 u32 sumo_dpm_get_current_mclk(struct radeon_device *rdev);
+u16 sumo_dpm_get_current_vddc(struct radeon_device *rdev);
 
 /*
  * cayman
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 05c4196a8212..f02386a0d988 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -737,6 +737,26 @@ static ssize_t radeon_hwmon_show_sclk(struct device *dev,
 static SENSOR_DEVICE_ATTR(freq1_input, S_IRUGO, radeon_hwmon_show_sclk, NULL,
 			  0);
 
+static ssize_t radeon_hwmon_show_vddc(struct device *dev,
+				      struct device_attribute *attr, char *buf)
+{
+	struct radeon_device *rdev = dev_get_drvdata(dev);
+	struct drm_device *ddev = rdev->ddev;
+	u16 vddc = 0;
+	
+	/* Can't get vddc when the card is off */
+	if ((rdev->flags & RADEON_IS_PX) &&
+		(ddev->switch_power_state != DRM_SWITCH_POWER_ON))
+		return -EINVAL;
+	
+	if (rdev->asic->dpm.get_current_vddc)
+		vddc = rdev->asic->dpm.get_current_vddc(rdev);
+	
+	return snprintf(buf, PAGE_SIZE, "%u\n", vddc);
+}
+
+static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, radeon_hwmon_show_vddc, NULL,
+			  0);
 
 static struct attribute *hwmon_attributes[] = {
 	&sensor_dev_attr_temp1_input.dev_attr.attr,
@@ -747,6 +767,7 @@ static struct attribute *hwmon_attributes[] = {
 	&sensor_dev_attr_pwm1_min.dev_attr.attr,
 	&sensor_dev_attr_pwm1_max.dev_attr.attr,
 	&sensor_dev_attr_freq1_input.dev_attr.attr,
+	&sensor_dev_attr_in0_input.dev_attr.attr,
 	NULL
 };
 
diff --git a/drivers/gpu/drm/radeon/sumo_dpm.c b/drivers/gpu/drm/radeon/sumo_dpm.c
index b95d5d390caf..f74f381af05f 100644
--- a/drivers/gpu/drm/radeon/sumo_dpm.c
+++ b/drivers/gpu/drm/radeon/sumo_dpm.c
@@ -1865,6 +1865,26 @@ u32 sumo_dpm_get_current_mclk(struct radeon_device *rdev)
 	return pi->sys_info.bootup_uma_clk;
 }
 
+u16 sumo_dpm_get_current_vddc(struct radeon_device *rdev)
+{
+	struct sumo_power_info *pi = sumo_get_pi(rdev);
+	struct radeon_ps *rps = &pi->current_rps;
+	struct sumo_ps *ps = sumo_get_ps(rps);
+	struct sumo_pl *pl;
+	u32 current_index =
+		(RREG32(TARGET_AND_CURRENT_PROFILE_INDEX) & CURR_INDEX_MASK) >>
+		CURR_INDEX_SHIFT;
+
+	if (current_index == BOOST_DPM_LEVEL) {
+		pl = &pi->boost_pl;
+	} else if (current_index >= ps->num_levels) {
+		return 0;
+	} else {
+		pl = &ps->levels[current_index];
+	}
+	return sumo_convert_voltage_index_to_value(rdev, pl->vddc_index);
+}
+
 void sumo_dpm_fini(struct radeon_device *rdev)
 {
 	int i;
--
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