diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/4242-drm-amdgpu-pm-document-power_dpm_state.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.14.71/4242-drm-amdgpu-pm-document-power_dpm_state.patch | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/4242-drm-amdgpu-pm-document-power_dpm_state.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/4242-drm-amdgpu-pm-document-power_dpm_state.patch new file mode 100644 index 00000000..5f886020 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/4242-drm-amdgpu-pm-document-power_dpm_state.patch @@ -0,0 +1,60 @@ +From ca54165717095b3d283a5d1ecd53ca480f8b4b30 Mon Sep 17 00:00:00 2001 +From: Alex Deucher <alexander.deucher@amd.com> +Date: Thu, 19 Apr 2018 13:56:41 -0500 +Subject: [PATCH 4242/5725] drm/amdgpu/pm: document power_dpm_state + +This is a legacy file and is only provided for +backwards compatibility. + +Acked-by: Felix Kuehling <Felix.Kuehling@amd.com> +Reviewed-by: Huang Rui <ray.huang@amd.com> +Signed-off-by: Alex Deucher <alexander.deucher@amd.com> +--- + drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 31 +++++++++++++++++++++++++++++++ + 1 file changed, 31 insertions(+) + +diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +index ef1eda4..05d701b0 100644 +--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c ++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +@@ -77,6 +77,37 @@ void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev) + } + } + ++/** ++ * DOC: power_dpm_state ++ * ++ * This is a legacy interface and is only provided for backwards compatibility. ++ * The amdgpu driver provides a sysfs API for adjusting certain power ++ * related parameters. The file power_dpm_state is used for this. ++ * It accepts the following arguments: ++ * - battery ++ * - balanced ++ * - performance ++ * ++ * battery ++ * ++ * On older GPUs, the vbios provided a special power state for battery ++ * operation. Selecting battery switched to this state. This is no ++ * longer provided on newer GPUs so the option does nothing in that case. ++ * ++ * balanced ++ * ++ * On older GPUs, the vbios provided a special power state for balanced ++ * operation. Selecting balanced switched to this state. This is no ++ * longer provided on newer GPUs so the option does nothing in that case. ++ * ++ * performance ++ * ++ * On older GPUs, the vbios provided a special power state for performance ++ * operation. Selecting performance switched to this state. This is no ++ * longer provided on newer GPUs so the option does nothing in that case. ++ * ++ */ ++ + static ssize_t amdgpu_get_dpm_state(struct device *dev, + struct device_attribute *attr, + char *buf) +-- +2.7.4 + |