drm/radeon/cik: add rlc helpers for DPM

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

2 files changed, 38 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
  *
diff --git a/drivers/gpu/drm/radeon/cikd.h b/drivers/gpu/drm/radeon/cikd.h
index 63955abb1e11..116b3131a683 100644
--- a/drivers/gpu/drm/radeon/cikd.h
+++ b/drivers/gpu/drm/radeon/cikd.h
@@ -952,6 +952,8 @@
 
 #define RLC_GPM_STAT                                      0xC400
 #       define RLC_GPM_BUSY                               (1 << 0)
+#       define GFX_POWER_STATUS                           (1 << 1)
+#       define GFX_CLOCK_STATUS                           (1 << 2)
 
 #define RLC_PG_CNTL                                       0xC40C
 #       define GFX_PG_ENABLE                              (1 << 0)
@@ -1004,6 +1006,13 @@
 #define RLC_GPM_SCRATCH_ADDR                              0xC4B0
 #define RLC_GPM_SCRATCH_DATA                              0xC4B4
 
+#define RLC_GPR_REG2                                      0xC4E8
+#define         REQ                                     0x00000001
+#define         MESSAGE(x)                              ((x) << 1)
+#define         MESSAGE_MASK                            0x0000001e
+#define         MSG_ENTER_RLC_SAFE_MODE                         1
+#define         MSG_EXIT_RLC_SAFE_MODE                          0
+
 #define CP_HPD_EOP_BASE_ADDR                              0xC904
 #define CP_HPD_EOP_BASE_ADDR_HI                           0xC908
 #define CP_HPD_EOP_VMID                                   0xC90C