G80: Create output partners.

Each pair of outputs shares an I2C rec.  This will be used in a future change
for the detect and get_modes routines.

4 files changed, 48 insertions, 24 deletions

diff --git a/src/g80_dac.c b/src/g80_dac.c
index 991e3be..bb86748 100644
--- a/src/g80_dac.c
+++ b/src/g80_dac.c
@@ -130,7 +130,7 @@ static const xf86OutputFuncsRec G80DacOutputFuncs = {
 };
 
 xf86OutputPtr
-G80CreateDac(ScrnInfoPtr pScrn, ORNum or, int i2cPort)
+G80CreateDac(ScrnInfoPtr pScrn, ORNum or)
 {
     G80OutputPrivPtr pPriv = xnfcalloc(sizeof(*pPriv), 1);
     xf86OutputPtr output;
@@ -149,8 +149,5 @@ G80CreateDac(ScrnInfoPtr pScrn, ORNum or, int i2cPort)
     output->interlaceAllowed = TRUE;
     output->doubleScanAllowed = TRUE;
 
-    /* Create an I2C object */
-    G80I2CInit(output, i2cPort);
-
     return output;
 }
diff --git a/src/g80_output.c b/src/g80_output.c
index b56bf00..d847e2e 100644
--- a/src/g80_output.c
+++ b/src/g80_output.c
@@ -127,18 +127,17 @@ static void G80_I2CGetBits(I2CBusPtr b, int *clock, int *data)
     *data = !!(val & 2);
 }
 
-Bool
-G80I2CInit(xf86OutputPtr output, const int port)
+static I2CBusPtr
+G80I2CInit(ScrnInfoPtr pScrn, const char *name, const int port)
 {
-    G80OutputPrivPtr pPriv = output->driver_private;
     I2CBusPtr i2c;
 
     /* Allocate the I2C bus structure */
     i2c = xf86CreateI2CBusRec();
-    if(!i2c) return FALSE;
+    if(!i2c) return NULL;
 
-    i2c->BusName = output->name;
-    i2c->scrnIndex = output->scrn->scrnIndex;
+    i2c->BusName = strdup(name);
+    i2c->scrnIndex = pScrn->scrnIndex;
     i2c->I2CPutBits = G80_I2CPutBits;
     i2c->I2CGetBits = G80_I2CGetBits;
     i2c->ByteTimeout = 2200; /* VESA DDC spec 3 p. 43 (+10 %) */
@@ -149,11 +148,10 @@ G80I2CInit(xf86OutputPtr output, const int port)
     i2c->DriverPrivate.val = port;
 
     if(xf86I2CBusInit(i2c)) {
-        pPriv->i2c = i2c;
-        return TRUE;
+        return i2c;
     } else {
         xfree(i2c);
-        return FALSE;
+        return NULL;
     }
 }
 
@@ -227,7 +225,10 @@ G80OutputDestroy(xf86OutputPtr output)
 {
     G80OutputPrivPtr pPriv = output->driver_private;
 
-    xf86DestroyI2CBusRec(pPriv->i2c, TRUE, TRUE);
+    if(pPriv->partner)
+        ((G80OutputPrivPtr)pPriv->partner->driver_private)->partner = NULL;
+    else
+        xf86DestroyI2CBusRec(pPriv->i2c, TRUE, TRUE);
     pPriv->i2c = NULL;
 }
 
@@ -243,10 +244,40 @@ G80CreateOutputs(ScrnInfoPtr pScrn)
 
     /* For each DDC port, create an output for the attached ORs */
     for(i = 0; i < 4; i++) {
+        xf86OutputPtr dac = NULL, sor = NULL;
+        I2CBusPtr i2c;
+        char i2cName[16];
+
+        if(pNv->i2cMap[i].dac == -1 && pNv->i2cMap[i].sor == -1)
+            /* No outputs on this port */
+            continue;
+
+        snprintf(i2cName, sizeof(i2cName), "I2C%i", i);
+        i2c = G80I2CInit(pScrn, i2cName, i);
+        if(!i2c) {
+            xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+                       "Failed to initialize I2C for port %i.\n",
+                       i);
+            continue;
+        }
+
         if(pNv->i2cMap[i].dac != -1)
-            G80CreateDac(pScrn, pNv->i2cMap[i].dac, i);
+            dac = G80CreateDac(pScrn, pNv->i2cMap[i].dac);
         if(pNv->i2cMap[i].sor != -1)
-            G80CreateSor(pScrn, pNv->i2cMap[i].sor, i);
+            sor = G80CreateSor(pScrn, pNv->i2cMap[i].sor);
+
+        if(dac) {
+            G80OutputPrivPtr pPriv = dac->driver_private;
+
+            pPriv->partner = sor;
+            pPriv->i2c = i2c;
+        }
+        if(sor) {
+            G80OutputPrivPtr pPriv = sor->driver_private;
+
+            pPriv->partner = dac;
+            pPriv->i2c = i2c;
+        }
     }
 
     /* For each output, set the crtc and clone masks */
@@ -260,4 +291,3 @@ G80CreateOutputs(ScrnInfoPtr pScrn)
 
     return TRUE;
 }
-
diff --git a/src/g80_output.h b/src/g80_output.h
index efc9a16..819df15 100644
--- a/src/g80_output.h
+++ b/src/g80_output.h
@@ -2,12 +2,12 @@ typedef struct G80OutputPrivRec {
     ORType type;
     ORNum or;
 
+    xf86OutputPtr partner;
     I2CBusPtr i2c;
 
     void (*set_pclk)(xf86OutputPtr, int pclk);
 } G80OutputPrivRec, *G80OutputPrivPtr;
 
-Bool G80I2CInit(xf86OutputPtr, const int port);
 void G80OutputSetPClk(xf86OutputPtr, int pclk);
 int G80OutputModeValid(xf86OutputPtr, DisplayModePtr);
 Bool G80OutputModeFixup(xf86OutputPtr, DisplayModePtr mode, DisplayModePtr adjusted_mode);
@@ -18,7 +18,7 @@ void G80OutputDestroy(xf86OutputPtr);
 Bool G80CreateOutputs(ScrnInfoPtr);
 
 /* g80_dac.c */
-xf86OutputPtr G80CreateDac(ScrnInfoPtr, ORNum, int i2cPort);
+xf86OutputPtr G80CreateDac(ScrnInfoPtr, ORNum);
 
 /* g80_sor.c */
-xf86OutputPtr G80CreateSor(ScrnInfoPtr, ORNum, int i2cPort);
+xf86OutputPtr G80CreateSor(ScrnInfoPtr, ORNum);
diff --git a/src/g80_sor.c b/src/g80_sor.c
index 7d377a8..55a643f 100644
--- a/src/g80_sor.c
+++ b/src/g80_sor.c
@@ -114,7 +114,7 @@ static const xf86OutputFuncsRec G80SorOutputFuncs = {
 };
 
 xf86OutputPtr
-G80CreateSor(ScrnInfoPtr pScrn, ORNum or, int i2cPort)
+G80CreateSor(ScrnInfoPtr pScrn, ORNum or)
 {
     G80OutputPrivPtr pPriv = xnfcalloc(sizeof(*pPriv), 1);
     xf86OutputPtr output;
@@ -133,8 +133,5 @@ G80CreateSor(ScrnInfoPtr pScrn, ORNum or, int i2cPort)
     output->interlaceAllowed = TRUE;
     output->doubleScanAllowed = TRUE;
 
-    /* Create an I2C object */
-    G80I2CInit(output, i2cPort);
-
     return output;
 }