diff --git a/src/rhd_pm.c b/src/rhd_pm.c
index 5fea157..f74804a 100644
--- a/src/rhd_pm.c
+++ b/src/rhd_pm.c
@@ -130,6 +130,61 @@ RHDPmRestore(RHDPtr rhdPtr)
 
 unsigned long
 RHDGetEngineClock(RHDPtr rhdPtr) {
+    if (rhdPtr->ChipSet == RHD_M82) {
+        /*  0006: 370000            SET_ATI_PORT  0000  (INDIRECT_IO_MM)  */
+
+        /*  0009: 0308008001        MOVE   work[00]   [..XX]  <-  reg[0180]  [..XX]  */
+        long work = RHDRegRead(rhdPtr, 0x0600) & 0x0000ffff;
+
+        /*  000e: 090d00e01f        AND    work[00]   [..XX]  <-  1fe0  */
+        work &= 0xffff1fe0;
+
+        /*  0013: 1b0d0005          SHIFT_RIGHT  work[00]   [..XX]  by  05  */
+        work = work >> 5;
+
+        /*  0017: 561800            CLEAR  work[00]   [XX..]  */
+        work &= 0x0000ffff;
+
+        /*  001a: 036000f501        MOVE   work[00]   [..X.]  <-  reg[01f5]  [...X]  */
+        work = (work & 0xffff00ff) | ((RHDRegRead(rhdPtr, 0x07D4) << 4) & 0x0000ff00);
+
+        /*  001f: 092500fe          AND    work[00]   [...X]  <-  fe  */
+        work &= 0xfffffffe;
+
+        /*  0023: 15050001          SHIFT_LEFT  work[00]   [XXXX]  by  01  */
+        work = work << 1;
+
+        /*  0027: 2105008c0a0000    MUL    work[00]   [XXXX]  <-  00000a8c  */
+        work *= 0xa8c;
+
+        /*  002e: 27054008000000    DIV    WS_QUOT/LOW32 [XXXX]  <-  00000008  */
+        work /= 0x8;
+
+        /*  0035: 4ae5800101        TEST   reg[0180]  [X...]  <-  01  */
+        /*  003a: 445500            JUMP_Equal  0055  */
+        if ((RHDRegRead(rhdPtr, 0x0600) & 0xff000000) != 0x01) {
+            /*  003d: 560041            CLEAR  WS_REMIND/HI32 [XXXX]  */
+
+            /*  0040: 0330418001        MOVE   WS_REMIND/HI32 [...X]  <-  reg[0180]  [.X..]  */
+            long remind = (RHDRegRead(rhdPtr, 0x0600) >> 16) & 0x000000ff;
+
+            /*  0045: 0925410f          AND    WS_REMIND/HI32 [...X]  <-  0f  */
+            remind &= 0xffffff0f;
+
+            /*  0049: 15254101          SHIFT_LEFT  WS_REMIND/HI32 [...X]  by  01  */
+            remind = (remind & 0xffffff00) | ((remind << 1) & 0x000000ff);
+
+            /*  004d: 2d254102          ADD    WS_REMIND/HI32 [...X]  <-  02  */
+            remind = (remind & 0xffffff00) | ((remind + 2) & 0x000000ff);
+
+            /*  0051: 27024041          DIV    WS_QUOT/LOW32 [XXXX]  <-  WS_REMIND/HI32 [XXXX]  */
+            work /= remind;
+        }
+
+        /*  0055: 02020040          MOVE   param[00]  [XXXX]  <-  WS_QUOT/LOW32 [XXXX]  */
+        xf86DrvMsg(rhdPtr->scrnIndex, X_INFO, "Maybe Engine Clock is %ld\n", work);
+    }
+
 #ifdef ATOM_BIOS
     union AtomBiosArg data;
     if (RHDAtomBiosFunc(rhdPtr->scrnIndex, rhdPtr->atomBIOS,