[Unichrome-devel] [PATCH] Support the VT3157 CRTCs

[Simon F. <sim...@on...>]

Values have been taken from Openchrome SVN, but reworked to use the
helpers instead of direct register access (which should make tweaking
the values easier if needed).
---
 src/via_crtc.c |   45 +++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 45 insertions(+), 0 deletions(-)

diff --git a/src/via_crtc.c b/src/via_crtc.c
index 9eb02ce..060f318 100644
--- a/src/via_crtc.c
+++ b/src/via_crtc.c
@@ -595,6 +595,21 @@ VT3344Crtc1FIFOSet(struct ViaCrtc *Crtc, DisplayModePtr Mode)
 	VT3108Crtc1FIFOHelper(Crtc, 47, 20, 16, 0);
 }
 
+/*
+ *
+ */
+static void
+VT3157Crtc1FIFOSet(struct ViaCrtc *Crtc, DisplayModePtr Mode)
+{
+    VIAFUNC(Crtc);
+
+    VIACrtc1FetchCountSet(Crtc, Mode);
+
+    /* Values taken from http://svn.openchrome.org/svn/trunk revision 747
+       file via_bandwidth.c line 235 onwards */
+    VT3108Crtc1FIFOHelper(Crtc, 95, 38, 38, 31);
+}
+
 
 /*
  *
@@ -775,6 +790,25 @@ VT3344Crtc2FIFOSet(struct ViaCrtc *Crtc, DisplayModePtr Mode)
 }
 
 /*
+ *
+ */
+static void
+VT3157Crtc2FIFOSet(struct ViaCrtc *Crtc, DisplayModePtr Mode)
+{
+    VIAFUNC(Crtc);
+
+    VIACrtc2FetchCountSet(Crtc, Mode);
+
+    /* Values taken from http://svn.openchrome.org/svn/trunk revision 747
+       file via_bandwidth.c line 382 onwards */
+    if (Crtc->Pitch >= 5600)
+	VT3108Crtc2FIFOHelper(Crtc, 10, 20, 8, 16);
+    else
+	VT3108Crtc2FIFOHelper(Crtc, 11, 20, 8, 32);
+
+}
+
+/*
  * Check whether our CRTC1 supports this mode.
  */
 static ModeStatus
@@ -1651,6 +1685,7 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
     case VT7205:
     case VT3108:
     case VT3344:
+    case VT3157:
 	break;
     default:
 	xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "%s: Unsupported chipset\n", __func__);
@@ -1691,6 +1726,9 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	case VT3344:
 	    Crtc->FIFOSet = VT3344Crtc1FIFOSet;
 	    break;
+        case VT3157:
+	    Crtc->FIFOSet = VT3157Crtc1FIFOSet;
+	    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__);
@@ -1705,6 +1743,7 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	    break;
 	case VT3108:
 	case VT3344:
+        case VT3157:
 	    Crtc->PLLSet = VT3108Crtc1PLLSet;
 	    break;
 	default:
@@ -1724,6 +1763,7 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	    break;
 	case VT3108:
 	case VT3344:
+        case VT3157:
 	    Crtc->GammaEnable = VT3108Crtc1GammaEnable;
 	    break;
 	default:
@@ -1782,6 +1822,9 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	case VT3344:
 	    Crtc->FIFOSet = VT3344Crtc2FIFOSet;
 	    break;
+        case VT3157:
+	    Crtc->FIFOSet = VT3157Crtc2FIFOSet;
+	    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__);
@@ -1796,6 +1839,7 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	    break;
 	case VT3108:
 	case VT3344:
+        case VT3157:
 	    Crtc->PLLSet = VT3108Crtc2PLLSet;
 	    break;
 	default:
@@ -1814,6 +1858,7 @@ ViaCrtcInit(ScrnInfoPtr pScrn)
 	    break;
 	case VT3108:
 	case VT3344:
+        case VT3157:
 	    Crtc->ScaleSet = VT3108Crtc2ScaleSet;
 	    break;
 	default:
-- 
1.5.4.1