diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/4749-drm-amd-amdgpu-Add-a-GPU_LOAD-entry-to-sysfs-v3.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.14.71/4749-drm-amd-amdgpu-Add-a-GPU_LOAD-entry-to-sysfs-v3.patch | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/4749-drm-amd-amdgpu-Add-a-GPU_LOAD-entry-to-sysfs-v3.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/4749-drm-amd-amdgpu-Add-a-GPU_LOAD-entry-to-sysfs-v3.patch new file mode 100644 index 00000000..3c3d9f82 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/4749-drm-amd-amdgpu-Add-a-GPU_LOAD-entry-to-sysfs-v3.patch @@ -0,0 +1,94 @@ +From 59766c824785eb6236991fc9396ca44236d44e75 Mon Sep 17 00:00:00 2001 +From: Tom St Denis <tom.stdenis@amd.com> +Date: Wed, 20 Jun 2018 07:55:39 -0400 +Subject: [PATCH 4749/5725] drm/amd/amdgpu: Add a GPU_LOAD entry to sysfs (v3) + +This adds what should be a stable interface to read GPU +load from userspace. + +(v2): Fix comments and name of file per recommendations. +(v3): Add chapter to amdgpu.rst as well. + +Signed-off-by: Tom St Denis <tom.stdenis@amd.com> +Acked-by: Slava Abramov <slava.abramov@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 | 40 ++++++++++++++++++++++++++++++++++ + 1 file changed, 40 insertions(+) + +diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +index bc2dd4f9..dbc8300 100644 +--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c ++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +@@ -918,6 +918,36 @@ static ssize_t amdgpu_set_pp_power_profile_mode(struct device *dev, + return -EINVAL; + } + ++/** ++ * DOC: busy_percent ++ * ++ * The amdgpu driver provides a sysfs API for reading how busy the GPU ++ * is as a percentage. The file gpu_busy_percent is used for this. ++ * The SMU firmware computes a percentage of load based on the ++ * aggregate activity level in the IP cores. ++ */ ++static ssize_t amdgpu_get_busy_percent(struct device *dev, ++ struct device_attribute *attr, ++ char *buf) ++{ ++ struct drm_device *ddev = dev_get_drvdata(dev); ++ struct amdgpu_device *adev = ddev->dev_private; ++ int r, value, size = sizeof(value); ++ ++ /* sanity check PP is enabled */ ++ if (!(adev->powerplay.pp_funcs && ++ adev->powerplay.pp_funcs->read_sensor)) ++ return -EINVAL; ++ ++ /* read the IP busy sensor */ ++ r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_GPU_LOAD, ++ (void *)&value, &size); ++ if (r) ++ return r; ++ ++ return snprintf(buf, PAGE_SIZE, "%d\n", value); ++} ++ + static DEVICE_ATTR(power_dpm_state, S_IRUGO | S_IWUSR, amdgpu_get_dpm_state, amdgpu_set_dpm_state); + static DEVICE_ATTR(power_dpm_force_performance_level, S_IRUGO | S_IWUSR, + amdgpu_get_dpm_forced_performance_level, +@@ -951,6 +981,8 @@ static DEVICE_ATTR(pp_power_profile_mode, S_IRUGO | S_IWUSR, + static DEVICE_ATTR(pp_od_clk_voltage, S_IRUGO | S_IWUSR, + amdgpu_get_pp_od_clk_voltage, + amdgpu_set_pp_od_clk_voltage); ++static DEVICE_ATTR(gpu_busy_percent, S_IRUGO, ++ amdgpu_get_busy_percent, NULL); + + static ssize_t amdgpu_hwmon_show_temp(struct device *dev, + struct device_attribute *attr, +@@ -1853,6 +1885,13 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev) + "pp_od_clk_voltage\n"); + return ret; + } ++ ret = device_create_file(adev->dev, ++ &dev_attr_gpu_busy_percent); ++ if (ret) { ++ DRM_ERROR("failed to create device file " ++ "gpu_busy_level\n"); ++ return ret; ++ } + ret = amdgpu_debugfs_pm_init(adev); + if (ret) { + DRM_ERROR("Failed to register debugfs file for dpm!\n"); +@@ -1888,6 +1927,7 @@ void amdgpu_pm_sysfs_fini(struct amdgpu_device *adev) + &dev_attr_pp_power_profile_mode); + device_remove_file(adev->dev, + &dev_attr_pp_od_clk_voltage); ++ device_remove_file(adev->dev, &dev_attr_gpu_busy_percent); + } + + void amdgpu_pm_compute_clocks(struct amdgpu_device *adev) +-- +2.7.4 + |