4 files changed, 30 insertions, 10 deletions

diff --git a/drivers/video/matrox/g450_pll.c b/drivers/video/matrox/g450_pll.c
index 7c76e079ca7d..d42346e7fdda 100644
--- a/drivers/video/matrox/g450_pll.c
+++ b/drivers/video/matrox/g450_pll.c
@@ -331,16 +331,19 @@ static int __g450_setclk(WPMINFO unsigned int fout, unsigned int pll,
                                         tmp |= M1064_XPIXCLKCTRL_PLL_UP;
                                 }
                                 matroxfb_DAC_out(PMINFO M1064_XPIXCLKCTRL, tmp);
-#ifdef __powerpc__
-                                /* This is necessary to avoid jitter on PowerPC
-                                 * (OpenFirmware) systems, but apparently
-                                 * introduces jitter, at least on a x86-64
-                                 * using DVI.
-                                 * A simple workaround is disable for non-PPC.
-                                 */
-                                matroxfb_DAC_out(PMINFO M1064_XDVICLKCTRL, 0);
-#endif /* __powerpc__ */
-                                matroxfb_DAC_out(PMINFO M1064_XPWRCTRL, xpwrctrl);
+                                /* DVI PLL preferred for frequencies up to
+                                   panel link max, standard PLL otherwise */
+                                if (fout >= MINFO->max_pixel_clock_panellink)
+                                        tmp = 0;
+                                else tmp =
+                                        M1064_XDVICLKCTRL_DVIDATAPATHSEL |
+                                        M1064_XDVICLKCTRL_C1DVICLKSEL |
+                                        M1064_XDVICLKCTRL_C1DVICLKEN |
+                                        M1064_XDVICLKCTRL_DVILOOPCTL |
+                                        M1064_XDVICLKCTRL_P1LOOPBWDTCTL;
+                                matroxfb_DAC_out(PMINFO M1064_XDVICLKCTRL,tmp);
+                                matroxfb_DAC_out(PMINFO M1064_XPWRCTRL,
+                                                 xpwrctrl);
 
                                 matroxfb_DAC_unlock_irqrestore(flags);
                         }
diff --git a/drivers/video/matrox/matroxfb_DAC1064.h b/drivers/video/matrox/matroxfb_DAC1064.h
index df39c3193735..7a98ce8043d7 100644
--- a/drivers/video/matrox/matroxfb_DAC1064.h
+++ b/drivers/video/matrox/matroxfb_DAC1064.h
@@ -33,6 +33,21 @@ void DAC1064_global_restore(WPMINFO2);
 #define     M1064_XCURCTRL_3COLOR       0x01    /* transparent, 0, 1, 2 */
 #define     M1064_XCURCTRL_XGA          0x02    /* 0, 1, transparent, complement */
 #define     M1064_XCURCTRL_XWIN         0x03    /* transparent, transparent, 0, 1 */
+        /* drive DVI by standard(0)/DVI(1) PLL */
+        /* if set(1), C?DVICLKEN and C?DVICLKSEL must be set(1) */
+#define      M1064_XDVICLKCTRL_DVIDATAPATHSEL   0x01
+        /* drive CRTC1 by standard(0)/DVI(1) PLL */
+#define      M1064_XDVICLKCTRL_C1DVICLKSEL      0x02
+        /* drive CRTC2 by standard(0)/DVI(1) PLL */
+#define      M1064_XDVICLKCTRL_C2DVICLKSEL      0x04
+        /* pixel clock allowed to(0)/blocked from(1) driving CRTC1 */
+#define      M1064_XDVICLKCTRL_C1DVICLKEN       0x08
+        /* DVI PLL loop filter bandwidth selection bits */
+#define      M1064_XDVICLKCTRL_DVILOOPCTL       0x30
+        /* CRTC2 pixel clock allowed to(0)/blocked from(1) driving CRTC2 */
+#define      M1064_XDVICLKCTRL_C2DVICLKEN       0x40
+        /* P1PLL loop filter bandwith selection */
+#define      M1064_XDVICLKCTRL_P1LOOPBWDTCTL    0x80
 #define M1064_XCURCOL0RED       0x08
 #define M1064_XCURCOL0GREEN     0x09
 #define M1064_XCURCOL0BLUE      0x0A
diff --git a/drivers/video/matrox/matroxfb_base.h b/drivers/video/matrox/matroxfb_base.h
index d59577c8de86..f3107ad7e545 100644
--- a/drivers/video/matrox/matroxfb_base.h
+++ b/drivers/video/matrox/matroxfb_base.h
@@ -424,6 +424,7 @@ struct matrox_fb_info {
                       } mmio;
 
         unsigned int    max_pixel_clock;
+        unsigned int    max_pixel_clock_panellink;
 
         struct matrox_switch*   hw_switch;
 
diff --git a/drivers/video/matrox/matroxfb_misc.c b/drivers/video/matrox/matroxfb_misc.c
index 5948e54b9ef9..ab7fb50bc1de 100644
--- a/drivers/video/matrox/matroxfb_misc.c
+++ b/drivers/video/matrox/matroxfb_misc.c
@@ -658,6 +658,7 @@ static int parse_pins5(WPMINFO const struct matrox_bios* bd) {
                 MINFO->values.reg.mctlwtst_core = (MINFO->values.reg.mctlwtst & ~7) |
                                                   wtst_xlat[MINFO->values.reg.mctlwtst & 7];
         }
+        MINFO->max_pixel_clock_panellink = bd->pins[47] * 4000;
         return 0;
 }