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>

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 686411e..7904887 100644 (file)
--- 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 50d0fb4..66b1131 100644 (file)
--- 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;