drm/radeon/cik: add rlc helpers for DPM

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

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index a36e98c9a875..727c296662f1 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -5587,6 +5587,35 @@ static u32 cik_halt_rlc(struct radeon_device *rdev)
         return orig;
 }
 
+void cik_enter_rlc_safe_mode(struct radeon_device *rdev)
+{
+        u32 tmp, i, mask;
+
+        tmp = REQ | MESSAGE(MSG_ENTER_RLC_SAFE_MODE);
+        WREG32(RLC_GPR_REG2, tmp);
+
+        mask = GFX_POWER_STATUS | GFX_CLOCK_STATUS;
+        for (i = 0; i < rdev->usec_timeout; i++) {
+                if ((RREG32(RLC_GPM_STAT) & mask) == mask)
+                        break;
+                udelay(1);
+        }
+
+        for (i = 0; i < rdev->usec_timeout; i++) {
+                if ((RREG32(RLC_GPR_REG2) & REQ) == 0)
+                        break;
+                udelay(1);
+        }
+}
+
+void cik_exit_rlc_safe_mode(struct radeon_device *rdev)
+{
+        u32 tmp;
+
+        tmp = REQ | MESSAGE(MSG_EXIT_RLC_SAFE_MODE);
+        WREG32(RLC_GPR_REG2, tmp);
+}
+
 /**
  * cik_rlc_stop - stop the RLC ME
  *