drm/radeon/kms: add support for internal thermal sensor on SI

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

4 files changed, 32 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index aaad93d7076b..c75ccc7f181f 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -241,6 +241,7 @@ extern int rv6xx_get_temp(struct radeon_device *rdev);
 extern int rv770_get_temp(struct radeon_device *rdev);
 extern int evergreen_get_temp(struct radeon_device *rdev);
 extern int sumo_get_temp(struct radeon_device *rdev);
+extern int si_get_temp(struct radeon_device *rdev);
 extern void evergreen_tiling_fields(unsigned tiling_flags, unsigned *bankw,
                                     unsigned *bankh, unsigned *mtaspect,
                                     unsigned *tile_split);
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 3575129c1940..a6dbefca56dd 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -474,6 +474,9 @@ static ssize_t radeon_hwmon_show_temp(struct device *dev,
         case THERMAL_TYPE_SUMO:
                 temp = sumo_get_temp(rdev);
                 break;
+        case THERMAL_TYPE_SI:
+                temp = si_get_temp(rdev);
+                break;
         default:
                 temp = 0;
                 break;
@@ -514,6 +517,7 @@ static int radeon_hwmon_init(struct radeon_device *rdev)
         case THERMAL_TYPE_EVERGREEN:
         case THERMAL_TYPE_NI:
         case THERMAL_TYPE_SUMO:
+        case THERMAL_TYPE_SI:
                 rdev->pm.int_hwmon_dev = hwmon_device_register(rdev->dev);
                 if (IS_ERR(rdev->pm.int_hwmon_dev)) {
                         err = PTR_ERR(rdev->pm.int_hwmon_dev);
diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index 39c64df005cf..3e91429d7bd2 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -28,6 +28,25 @@
 #include "sid.h"
 #include "atom.h"
 
+/* get temperature in millidegrees */
+int si_get_temp(struct radeon_device *rdev)
+{
+        u32 temp;
+        int actual_temp = 0;
+
+        temp = (RREG32(CG_MULT_THERMAL_STATUS) & CTF_TEMP_MASK) >>
+                CTF_TEMP_SHIFT;
+
+        if (temp & 0x200)
+                actual_temp = 255;
+        else
+                actual_temp = temp & 0x1ff;
+
+        actual_temp = (actual_temp * 1000);
+
+        return actual_temp;
+}
+
 /* watermark setup */
 static u32 dce6_line_buffer_adjust(struct radeon_device *rdev,
                                    struct radeon_crtc *radeon_crtc,
diff --git a/drivers/gpu/drm/radeon/sid.h b/drivers/gpu/drm/radeon/sid.h
index 962cc17a6076..f565a8fa7ead 100644
--- a/drivers/gpu/drm/radeon/sid.h
+++ b/drivers/gpu/drm/radeon/sid.h
@@ -24,6 +24,14 @@
 #ifndef SI_H
 #define SI_H
 
+#define CG_MULT_THERMAL_STATUS                                  0x714
+#define         ASIC_MAX_TEMP(x)                                ((x) << 0)
+#define         ASIC_MAX_TEMP_MASK                              0x000001ff
+#define         ASIC_MAX_TEMP_SHIFT                             0
+#define         CTF_TEMP(x)                                     ((x) << 9)
+#define         CTF_TEMP_MASK                                   0x0003fe00
+#define         CTF_TEMP_SHIFT                                  9
+
 #define MC_SHARED_CHMAP                                         0x2004
 #define         NOOFCHAN_SHIFT                                  12
 #define         NOOFCHAN_MASK                                   0x0000f000