r2xx/r3xx/r4xx: further i2c fixups

- hw i2c engine has pin selection on r2xx/r2xx/r3xx chips
- also switch hw i2c pin sel for external tmds

5 files changed, 41 insertions, 36 deletions

diff --git a/src/legacy_output.c b/src/legacy_output.c
index 423a3e27..7134ee15 100644
--- a/src/legacy_output.c
+++ b/src/legacy_output.c
@@ -150,7 +150,6 @@ void
 RADEONGetExtTMDSInfo(ScrnInfoPtr pScrn, radeon_dvo_ptr dvo)
 {
     RADEONInfoPtr  info       = RADEONPTR(pScrn);
-    I2CBusPtr pDVOBus;
 
     if (!info->IsAtomBios) {
 #if defined(__powerpc__)
@@ -162,11 +161,11 @@ RADEONGetExtTMDSInfo(ScrnInfoPtr pScrn, radeon_dvo_ptr dvo)
 	    dvo->dvo_i2c_slave_addr = 0x70;
 	}
 #endif
-	if (RADEONI2CInit(pScrn, &pDVOBus, "DVO", &dvo->dvo_i2c)) {
+	if (RADEONI2CInit(pScrn, &dvo->pI2CBus, "DVO", &dvo->dvo_i2c)) {
 	    dvo->DVOChip =
-		RADEONDVODeviceInit(pDVOBus, dvo->dvo_i2c_slave_addr);
+		RADEONDVODeviceInit(dvo->pI2CBus, dvo->dvo_i2c_slave_addr);
 	    if (!dvo->DVOChip)
-		xfree(pDVOBus);
+		xfree(dvo->pI2CBus);
 	}
     }
 }
@@ -481,7 +480,7 @@ RADEONRestoreDVOChip(ScrnInfoPtr pScrn, xf86OutputPtr output)
     if (!dvo->DVOChip)
 	return;
 
-    RADEONI2CDoLock(output, TRUE);
+    RADEONI2CDoLock(output, dvo->pI2CBus, TRUE);
     if (!RADEONInitExtTMDSInfoFromBIOS(output)) {
 	if (dvo->DVOChip) {
 	    switch(info->ext_tmds_chip) {
@@ -511,7 +510,7 @@ RADEONRestoreDVOChip(ScrnInfoPtr pScrn, xf86OutputPtr output)
 	    }
 	}
     }
-    RADEONI2CDoLock(output, FALSE);
+    RADEONI2CDoLock(output, dvo->pI2CBus, FALSE);
 }
 
 #if 0
diff --git a/src/radeon.h b/src/radeon.h
index eaaff250..24a592c7 100644
--- a/src/radeon.h
+++ b/src/radeon.h
@@ -1161,7 +1161,7 @@ extern void RADEONPrintPortMap(ScrnInfoPtr pScrn);
 extern void RADEONSetOutputType(ScrnInfoPtr pScrn,
 				RADEONOutputPrivatePtr radeon_output);
 extern Bool RADEONSetupConnectors(ScrnInfoPtr pScrn);
-extern Bool RADEONI2CDoLock(xf86OutputPtr output, Bool lock_state);
+extern Bool RADEONI2CDoLock(xf86OutputPtr output, I2CBusPtr b, Bool lock_state);
 
 
 /* radeon_tv.c */
diff --git a/src/radeon_output.c b/src/radeon_output.c
index e545c79c..67d94feb 100644
--- a/src/radeon_output.c
+++ b/src/radeon_output.c
@@ -217,24 +217,14 @@ radeon_ddc_connected(xf86OutputPtr output)
     RADEONMonitorType MonType = MT_NONE;
     xf86MonPtr MonInfo = NULL;
     RADEONOutputPrivatePtr radeon_output = output->driver_private;
-    unsigned char *RADEONMMIO = info->MMIO;
 
     if (radeon_output->pI2CBus) {
-	/* RV410 appears to have a bug where the hw i2c in reset
-	 * holds the i2c port in a bad state - switch hw i2c away before
-	 * doing DDC - do this for all r300s for safety sakes */
-	if (IS_R300_VARIANT) {
-	    if (radeon_output->ddc_i2c.mask_clk_reg == RADEON_GPIO_VGA_DDC)
-                OUTREG(RADEON_DVI_I2C_CNTL_0, 0x30);
-	    else
-                OUTREG(RADEON_DVI_I2C_CNTL_0, 0x20);
-	}	
 	if (info->get_hardcoded_edid_from_bios)
 	    MonInfo = RADEONGetHardCodedEDIDFromBIOS(output);
 	if (MonInfo == NULL) {
-	    RADEONI2CDoLock(output, TRUE);
+	    RADEONI2CDoLock(output, radeon_output->pI2CBus, TRUE);
 	    MonInfo = xf86OutputGetEDID(output, radeon_output->pI2CBus);
-	    RADEONI2CDoLock(output, FALSE);
+	    RADEONI2CDoLock(output, radeon_output->pI2CBus, FALSE);
 	}
     }
     if (MonInfo) {
@@ -1653,16 +1643,27 @@ static const xf86OutputFuncsRec radeon_output_funcs = {
 };
 
 Bool
-RADEONI2CDoLock(xf86OutputPtr output, int lock_state)
+RADEONI2CDoLock(xf86OutputPtr output, I2CBusPtr b, int lock_state)
 {
     ScrnInfoPtr pScrn = output->scrn;
     RADEONInfoPtr  info       = RADEONPTR(pScrn);
-    RADEONOutputPrivatePtr radeon_output = output->driver_private;
-    RADEONI2CBusPtr pRADEONI2CBus = radeon_output->pI2CBus->DriverPrivate.ptr;
+    RADEONI2CBusPtr pRADEONI2CBus = b->DriverPrivate.ptr;
     unsigned char *RADEONMMIO = info->MMIO;
     uint32_t temp;
 
     if (lock_state) {
+	/* RV410 appears to have a bug where the hw i2c in reset
+	 * holds the i2c port in a bad state - switch hw i2c away before
+	 * doing DDC - do this for all r200s/r300s for safety sakes */
+	if ((info->ChipFamily >= CHIP_FAMILY_R200) && (!IS_AVIVO_VARIANT)) {
+	    if (pRADEONI2CBus->mask_clk_reg == RADEON_GPIO_CRT2_DDC)
+                OUTREG(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
+					       R200_DVI_I2C_PIN_SEL(R200_SEL_DVI_DDC)));
+	    else
+                OUTREG(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
+					       R200_DVI_I2C_PIN_SEL(R200_SEL_CRT2_DDC)));
+	}
+
 	temp = INREG(pRADEONI2CBus->a_clk_reg);
 	temp &= ~(pRADEONI2CBus->a_clk_mask);
 	OUTREG(pRADEONI2CBus->a_clk_reg, temp);
diff --git a/src/radeon_probe.h b/src/radeon_probe.h
index 64799729..3e4f47c3 100644
--- a/src/radeon_probe.h
+++ b/src/radeon_probe.h
@@ -216,6 +216,7 @@ typedef struct _radeon_lvds {
 
 typedef struct _radeon_dvo {
     /* dvo */
+    I2CBusPtr         pI2CBus;
     I2CDevPtr         DVOChip;
     RADEONI2CBusRec   dvo_i2c;
     int               dvo_i2c_slave_addr;
diff --git a/src/radeon_reg.h b/src/radeon_reg.h
index 1cc7640f..85923d15 100644
--- a/src/radeon_reg.h
+++ b/src/radeon_reg.h
@@ -1009,24 +1009,28 @@
 
        /* Multimedia I2C bus */
 #define RADEON_I2C_CNTL_0		    0x0090
-#define RADEON_I2C_DONE (1<<0)
-#define RADEON_I2C_NACK (1<<1)
-#define RADEON_I2C_HALT (1<<2)
-#define RADEON_I2C_SOFT_RST (1<<5)
-#define RADEON_I2C_DRIVE_EN (1<<6)
-#define RADEON_I2C_DRIVE_SEL (1<<7)
-#define RADEON_I2C_START (1<<8)
-#define RADEON_I2C_STOP (1<<9)
-#define RADEON_I2C_RECEIVE (1<<10)
-#define RADEON_I2C_ABORT (1<<11)
-#define RADEON_I2C_GO (1<<12)
+#define RADEON_I2C_DONE                     (1 << 0)
+#define RADEON_I2C_NACK                     (1 << 1)
+#define RADEON_I2C_HALT                     (1 << 2)
+#define RADEON_I2C_SOFT_RST                 (1 << 5)
+#define RADEON_I2C_DRIVE_EN                 (1 << 6)
+#define RADEON_I2C_DRIVE_SEL                (1 << 7)
+#define RADEON_I2C_START                    (1 << 8)
+#define RADEON_I2C_STOP                     (1 << 9)
+#define RADEON_I2C_RECEIVE                  (1 << 10)
+#define RADEON_I2C_ABORT                    (1 << 11)
+#define RADEON_I2C_GO                       (1 << 12)
 #define RADEON_I2C_CNTL_1                   0x0094
-#define RADEON_I2C_SEL         (1<<16)
-#define RADEON_I2C_EN          (1<<17)
+#define RADEON_I2C_SEL                      (1 << 16)
+#define RADEON_I2C_EN                       (1 << 17)
 #define RADEON_I2C_DATA			    0x0098
 
 #define RADEON_DVI_I2C_CNTL_0		    0x02e0
-#define RADEON_DVI_I2C_CNTL_1               0x02e4 /* ? */
+#       define R200_DVI_I2C_PIN_SEL(x)      ((x) << 3)
+#       define R200_SEL_DVI_DDC             0
+#       define R200_SEL_VGA_DDC             1
+#       define R200_SEL_CRT2_DDC            2
+#define RADEON_DVI_I2C_CNTL_1               0x02e4
 #define RADEON_DVI_I2C_DATA		    0x02e8
 
 #define RADEON_INTERRUPT_LINE               0x0f3c /* PCI */