drm/radeon/kms: add support for internal thermal sensors (v3)

[deliverable/linux.git] / drivers / gpu / drm / radeon / evergreen.c

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 057192acdd36600abc91dc73d0850a541b65fd1c..1b7da39cc5877be0b729559541e2ab1b89cd08c3 100644 (file)
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -39,6 +39,23 @@
 static void evergreen_gpu_init(struct radeon_device *rdev);
 void evergreen_fini(struct radeon_device *rdev);
 
+/* get temperature in millidegrees */
+u32 evergreen_get_temp(struct radeon_device *rdev)
+{
+       u32 temp = (RREG32(CG_MULT_THERMAL_STATUS) & ASIC_T_MASK) >>
+               ASIC_T_SHIFT;
+       u32 actual_temp = 0;
+
+       if ((temp >> 10) & 1)
+               actual_temp = 0;
+       else if ((temp >> 9) & 1)
+               actual_temp = 255;
+       else
+               actual_temp = (temp >> 1) & 0xff;
+
+       return actual_temp * 1000;
+}
+
 void evergreen_pm_misc(struct radeon_device *rdev)
 {
        int req_ps_idx = rdev->pm.requested_power_state_index;