drm/radeon: add INFO query for GPU temperature

Useful for profiling.

Tested-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 686411e4e4f6..7904887c6cc7 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -547,6 +547,13 @@ static int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file
                 else
                         *value = 1;
                 break;
+        case RADEON_INFO_CURRENT_GPU_TEMP:
+                /* get temperature in millidegrees C */
+                if (rdev->asic->pm.get_temperature)
+                        *value = radeon_get_temperature(rdev);
+                else
+                        *value = 0;
+                break;
         default:
                 DRM_DEBUG_KMS("Invalid request %d\n", info->request);
                 return -EINVAL;
diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h
index 50d0fb41a3bf..66b1131bb296 100644
--- a/include/uapi/drm/radeon_drm.h
+++ b/include/uapi/drm/radeon_drm.h
@@ -1034,6 +1034,7 @@ struct drm_radeon_cs {
 #define RADEON_INFO_VRAM_USAGE          0x1e
 #define RADEON_INFO_GTT_USAGE           0x1f
 #define RADEON_INFO_ACTIVE_CU_COUNT     0x20
+#define RADEON_INFO_CURRENT_GPU_TEMP    0x21
 
 struct drm_radeon_info {
         uint32_t                request;