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

[deliverable/linux.git] / drivers / gpu / drm / radeon / rv770.c

diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index 6a7bf109197157c395ffe3053477a43505d00612..836c15ab84d1741eb13eec77b4819983c071c59f 100644 (file)
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -42,6 +42,21 @@
 static void rv770_gpu_init(struct radeon_device *rdev);
 void rv770_fini(struct radeon_device *rdev);
 
+/* get temperature in millidegrees */
+u32 rv770_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 >> 9) & 1)
+               actual_temp = 0;
+       else
+               actual_temp = (temp >> 1) & 0xff;
+
+       return actual_temp * 1000;
+}
+
 void rv770_pm_misc(struct radeon_device *rdev)
 {
        int req_ps_idx = rdev->pm.requested_power_state_index;