Crtc: VT1122: Add initial modesetting support.

* Add FIFOSet functions.
* Use VT3230 PLL calculation, close to this, but less steep and
  lower.
* Leave the rest of CRTC testing for this device as a TODO.

1 files changed, 43 insertions, 1 deletions

diff --git a/src/via_crtc.c b/src/via_crtc.c
index 78778a4..b2f2442 100644
--- a/src/via_crtc.c
+++ b/src/via_crtc.c
@@ -187,7 +187,8 @@ VT3118PLLGenerate(struct ViaCrtc *Crtc, int Clock)
 
 /*
  * VT3230 is the steepest, most left limit found for VT3157, VT3230, VT3343,
- * and VT3371. So use the limit close to VT3230 to limit all these dotclocks.
+ * VT3371, and VT1122. So use the limit close to VT3230 to limit all these
+ * dotclocks.
  */
 static CARD32
 VT3230PLLGenerate(struct ViaCrtc *Crtc, int Clock)
@@ -837,6 +838,21 @@ VT3371Crtc1FIFOSet(struct ViaCrtc *Crtc, DisplayModePtr Mode)
  *
  */
 static void
+VT1122Crtc1FIFOSet(struct ViaCrtc *Crtc, DisplayModePtr Mode)
+{
+    VIAFUNC(Crtc);
+
+    VIACrtc1FetchCountSet(Crtc, Mode);
+
+    /* Depth = 192 / 2 - 1; Threshold = 152 / 4;
+       HighThreshold = 152 / 4; Expire = 64 / 4 */
+    VT3108Crtc1FIFOHelper(Crtc, 95, 38, 38, 16);
+}
+
+/*
+ *
+ */
+static void
 VT3122Crtc2FIFOHelper(struct ViaCrtc *Crtc, Bool ExtendedEnable, CARD8 Depth,
 		      CARD8 Threshold)
 {
@@ -1072,6 +1088,21 @@ VT3371Crtc2FIFOSet(struct ViaCrtc *Crtc, DisplayModePtr Mode)
 }
 
 /*
+ *
+ */
+static void
+VT1122Crtc2FIFOSet(struct ViaCrtc *Crtc, DisplayModePtr Mode)
+{
+    VIAFUNC(Crtc);
+
+    VIACrtc2FetchCountSet(Crtc, Mode);
+
+    /* Depth: 96 / 8 - 1; Threshold: 64 / 4;
+       HighThreshold: 32 / 4; Expire: 128 /4 */
+    VT3108Crtc2FIFOHelper(Crtc, 11, 16, 8, 32);
+}
+
+/*
  * Check whether our CRTC1 supports this mode.
  */
 static ModeStatus
@@ -1953,6 +1984,7 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
     case VT3157:
     case VT3343:
     case VT3371:
+    case VT1122:
 	break;
     default:
 	xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "%s: Unsupported chipset\n", __func__);
@@ -2005,6 +2037,9 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	case VT3371:
 	    Crtc->FIFOSet = VT3371Crtc1FIFOSet;
 	    break;
+	case VT1122:
+	    Crtc->FIFOSet = VT1122Crtc1FIFOSet;
+	    break;
 	default:
 	    /* should never happen, fix up the check at the top of this function */
 	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "%s: unsupported chipset\n", __func__);
@@ -2028,6 +2063,7 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	case VT3230:
 	case VT3343:
 	case VT3371:
+	case VT1122:
 	    Crtc->PLLSet = VT3230Crtc1PLLSet;
 	    break;
 	default:
@@ -2052,6 +2088,7 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	case VT3157:
 	case VT3343:
 	case VT3371:
+	case VT1122:
 	    Crtc->GammaEnable = VT3108Crtc1GammaEnable;
 	    break;
 	default:
@@ -2122,6 +2159,9 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	case VT3371:
 	    Crtc->FIFOSet = VT3371Crtc2FIFOSet;
 	    break;
+	case VT1122:
+	    Crtc->FIFOSet = VT1122Crtc2FIFOSet;
+	    break;
 	default:
 	    /* should never happen, fix up the check at the top of this function */
 	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "%s: unsupported chipset\n", __func__);
@@ -2145,6 +2185,7 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	case VT3230:
 	case VT3343:
 	case VT3371:
+	case VT1122:
 	    Crtc->PLLSet = VT3230Crtc2PLLSet;
 	    break;
 	default:
@@ -2168,6 +2209,7 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	case VT3230:
 	case VT3343:
 	case VT3371:
+	case VT1122:
 	    Crtc->ScaleSet = VT3108Crtc2ScaleSet;
 	    break;
 	default: