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From ed01fc2e2d4d93a3a343795f9914518edf891ac1 Mon Sep 17 00:00:00 2001
From: Evan Quan <evan.quan@amd.com>
Date: Mon, 14 Jan 2019 14:45:47 +0800
Subject: [PATCH 1107/2940] drm/amd/powerplay: support retrieving and adjusting
SOC clock power levels V2
User can use "pp_dpm_socclk" to retrieve and adjust SOC clock power
levels.
V2: expose this interface for Vega10 and later ASICs only
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 54 ++++++++++++++++++-
.../gpu/drm/amd/include/kgd_pp_interface.h | 1 +
.../drm/amd/powerplay/hwmgr/vega20_hwmgr.c | 45 ++++++++++++++++
3 files changed, 98 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index f21f294e6735..4bdb1d082bea 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -680,11 +680,13 @@ static ssize_t amdgpu_get_ppfeature_status(struct device *dev,
}
/**
- * DOC: pp_dpm_sclk pp_dpm_mclk pp_dpm_pcie
+ * DOC: pp_dpm_sclk pp_dpm_mclk pp_dpm_socclk pp_dpm_pcie
*
* The amdgpu driver provides a sysfs API for adjusting what power levels
* are enabled for a given power state. The files pp_dpm_sclk, pp_dpm_mclk,
- * and pp_dpm_pcie are used for this.
+ * pp_dpm_socclk and pp_dpm_pcie are used for this.
+ *
+ * pp_dpm_socclk interface is only available for Vega10 and later ASICs.
*
* Reading back the files will show you the available power levels within
* the power state and the clock information for those levels.
@@ -804,6 +806,42 @@ static ssize_t amdgpu_set_pp_dpm_mclk(struct device *dev,
return count;
}
+static ssize_t amdgpu_get_pp_dpm_socclk(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+ struct amdgpu_device *adev = ddev->dev_private;
+
+ if (adev->powerplay.pp_funcs->print_clock_levels)
+ return amdgpu_dpm_print_clock_levels(adev, PP_SOCCLK, buf);
+ else
+ return snprintf(buf, PAGE_SIZE, "\n");
+}
+
+static ssize_t amdgpu_set_pp_dpm_socclk(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+ struct amdgpu_device *adev = ddev->dev_private;
+ int ret;
+ uint32_t mask = 0;
+
+ ret = amdgpu_read_mask(buf, count, &mask);
+ if (ret)
+ return ret;
+
+ if (adev->powerplay.pp_funcs->force_clock_level)
+ ret = amdgpu_dpm_force_clock_level(adev, PP_SOCCLK, mask);
+
+ if (ret)
+ return -EINVAL;
+
+ return count;
+}
+
static ssize_t amdgpu_get_pp_dpm_pcie(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -1087,6 +1125,9 @@ static DEVICE_ATTR(pp_dpm_sclk, S_IRUGO | S_IWUSR,
static DEVICE_ATTR(pp_dpm_mclk, S_IRUGO | S_IWUSR,
amdgpu_get_pp_dpm_mclk,
amdgpu_set_pp_dpm_mclk);
+static DEVICE_ATTR(pp_dpm_socclk, S_IRUGO | S_IWUSR,
+ amdgpu_get_pp_dpm_socclk,
+ amdgpu_set_pp_dpm_socclk);
static DEVICE_ATTR(pp_dpm_pcie, S_IRUGO | S_IWUSR,
amdgpu_get_pp_dpm_pcie,
amdgpu_set_pp_dpm_pcie);
@@ -2246,6 +2287,13 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev)
DRM_ERROR("failed to create device file pp_dpm_mclk\n");
return ret;
}
+ if (adev->asic_type >= CHIP_VEGA10) {
+ ret = device_create_file(adev->dev, &dev_attr_pp_dpm_socclk);
+ if (ret) {
+ DRM_ERROR("failed to create device file pp_dpm_socclk\n");
+ return ret;
+ }
+ }
ret = device_create_file(adev->dev, &dev_attr_pp_dpm_pcie);
if (ret) {
DRM_ERROR("failed to create device file pp_dpm_pcie\n");
@@ -2333,6 +2381,8 @@ void amdgpu_pm_sysfs_fini(struct amdgpu_device *adev)
device_remove_file(adev->dev, &dev_attr_pp_dpm_sclk);
device_remove_file(adev->dev, &dev_attr_pp_dpm_mclk);
+ if (adev->asic_type >= CHIP_VEGA10)
+ device_remove_file(adev->dev, &dev_attr_pp_dpm_socclk);
device_remove_file(adev->dev, &dev_attr_pp_dpm_pcie);
device_remove_file(adev->dev, &dev_attr_pp_sclk_od);
device_remove_file(adev->dev, &dev_attr_pp_mclk_od);
diff --git a/drivers/gpu/drm/amd/include/kgd_pp_interface.h b/drivers/gpu/drm/amd/include/kgd_pp_interface.h
index 1130f293c4ee..f5ec25a6ab54 100644
--- a/drivers/gpu/drm/amd/include/kgd_pp_interface.h
+++ b/drivers/gpu/drm/amd/include/kgd_pp_interface.h
@@ -92,6 +92,7 @@ enum pp_clock_type {
PP_SCLK,
PP_MCLK,
PP_PCIE,
+ PP_SOCCLK,
OD_SCLK,
OD_MCLK,
OD_VDDC_CURVE,
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
index 3e97b9d6f450..e7c890f036fa 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
@@ -2296,6 +2296,34 @@ static int vega20_force_clock_level(struct pp_hwmgr *hwmgr,
break;
+ case PP_SOCCLK:
+ soft_min_level = mask ? (ffs(mask) - 1) : 0;
+ soft_max_level = mask ? (fls(mask) - 1) : 0;
+
+ if (soft_max_level >= data->dpm_table.soc_table.count) {
+ pr_err("Clock level specified %d is over max allowed %d\n",
+ soft_max_level,
+ data->dpm_table.soc_table.count - 1);
+ return -EINVAL;
+ }
+
+ data->dpm_table.soc_table.dpm_state.soft_min_level =
+ data->dpm_table.soc_table.dpm_levels[soft_min_level].value;
+ data->dpm_table.soc_table.dpm_state.soft_max_level =
+ data->dpm_table.soc_table.dpm_levels[soft_max_level].value;
+
+ ret = vega20_upload_dpm_min_level(hwmgr, FEATURE_DPM_SOCCLK_MASK);
+ PP_ASSERT_WITH_CODE(!ret,
+ "Failed to upload boot level to lowest!",
+ return ret);
+
+ ret = vega20_upload_dpm_max_level(hwmgr, FEATURE_DPM_SOCCLK_MASK);
+ PP_ASSERT_WITH_CODE(!ret,
+ "Failed to upload dpm max level to highest!",
+ return ret);
+
+ break;
+
case PP_PCIE:
soft_min_level = mask ? (ffs(mask) - 1) : 0;
soft_max_level = mask ? (fls(mask) - 1) : 0;
@@ -2931,6 +2959,23 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
(clocks.data[i].clocks_in_khz == now * 10) ? "*" : "");
break;
+ case PP_SOCCLK:
+ ret = vega20_get_current_clk_freq(hwmgr, PPCLK_SOCCLK, &now);
+ PP_ASSERT_WITH_CODE(!ret,
+ "Attempt to get current socclk freq Failed!",
+ return ret);
+
+ ret = vega20_get_socclocks(hwmgr, &clocks);
+ PP_ASSERT_WITH_CODE(!ret,
+ "Attempt to get soc clk levels Failed!",
+ return ret);
+
+ for (i = 0; i < clocks.num_levels; i++)
+ size += sprintf(buf + size, "%d: %uMhz %s\n",
+ i, clocks.data[i].clocks_in_khz / 1000,
+ (clocks.data[i].clocks_in_khz == now * 10) ? "*" : "");
+ break;
+
case PP_PCIE:
gen_speed = (RREG32_PCIE(smnPCIE_LC_SPEED_CNTL) &
PSWUSP0_PCIE_LC_SPEED_CNTL__LC_CURRENT_DATA_RATE_MASK)
--
2.17.1
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