drm/radeon: add support for thermal sensor on tn

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

4 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 84583302b081..f88946160854 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -692,6 +692,14 @@ out:
         return err;
 }
 
+int tn_get_temp(struct radeon_device *rdev)
+{
+        u32 temp = RREG32_SMC(TN_CURRENT_GNB_TEMP) & 0x7ff;
+        int actual_temp = (temp / 8) - 49;
+
+        return actual_temp * 1000;
+}
+
 /*
  * Core functions
  */
diff --git a/drivers/gpu/drm/radeon/nid.h b/drivers/gpu/drm/radeon/nid.h
index e226faf16fea..7b8da5214729 100644
--- a/drivers/gpu/drm/radeon/nid.h
+++ b/drivers/gpu/drm/radeon/nid.h
@@ -489,6 +489,9 @@
 #       define CACHE_FLUSH_AND_INV_EVENT_TS                     (0x14 << 0)
 #       define CACHE_FLUSH_AND_INV_EVENT                        (0x16 << 0)
 
+/* TN SMU registers */
+#define TN_CURRENT_GNB_TEMP                             0x1F390
+
 /*
  * UVD
  */
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 9f5426388cf7..0a39680ed166 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1897,6 +1897,7 @@ static struct radeon_asic trinity_asic = {
                 .set_pcie_lanes = NULL,
                 .set_clock_gating = NULL,
                 .set_uvd_clocks = &sumo_set_uvd_clocks,
+                .get_temperature = &tn_get_temp,
         },
         .pflip = {
                 .pre_page_flip = &evergreen_pre_page_flip,
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index 74f04a8c7db4..0879f3be8cbc 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -492,6 +492,7 @@ void evergreen_hdmi_enable(struct drm_encoder *encoder, bool enable);
 void evergreen_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mode);
 int evergreen_get_temp(struct radeon_device *rdev);
 int sumo_get_temp(struct radeon_device *rdev);
+int tn_get_temp(struct radeon_device *rdev);
 
 /*
  * cayman