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

rv6xx/rv7xx/evergreen families supported; older asics did
not have an internal thermal sensor.

Note, not all oems use the internal thermal sensor, so it's
only exposed in cases where it is used.

Note also, that most laptops use an oem specific ACPI solution for
GPU thermal information rather than using the internal thermal
sensor directly.

v2: export millidegrees celsius, use hwmon device properly.
v3: fix Kconfig

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/r600d.h b/drivers/gpu/drm/radeon/r600d.h
index 59c1f8793e60..23205f032872 100644
--- a/drivers/gpu/drm/radeon/r600d.h
+++ b/drivers/gpu/drm/radeon/r600d.h
@@ -239,6 +239,11 @@
 #define GRBM_SOFT_RESET                                 0x8020
 #define         SOFT_RESET_CP                                   (1<<0)
 
+#define CG_THERMAL_STATUS                               0x7F4
+#define         ASIC_T(x)                               ((x) << 0)
+#define         ASIC_T_MASK                             0x1FF
+#define         ASIC_T_SHIFT                            0
+
 #define HDP_HOST_PATH_CNTL                              0x2C00
 #define HDP_NONSURFACE_BASE                             0x2C04
 #define HDP_NONSURFACE_INFO                             0x2C08