From 433c8617341f5768255826435a2b09afba684f02 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexdeucher@gmail.com>
Date: Thu, 25 Feb 2010 21:03:13 -0500
Subject: update ZaphodHeads option

Now that the screen section mapping is fixed,
Make the option per-instance and allow multiple
outputs to be specified; e.g., DVI-0 and HDMI-0
associated with instance 0 and LVDS and VGA-0
associated with instance 1.
---
 man/radeon.man        |  8 ++++----
 src/drmmode_display.c |  2 +-
 src/radeon.h          |  3 +--
 src/radeon_driver.c   | 39 ++++++++++++---------------------------
 4 files changed, 18 insertions(+), 34 deletions(-)

diff --git a/man/radeon.man b/man/radeon.man
index ca8ce60d..05b7d164 100644
--- a/man/radeon.man
+++ b/man/radeon.man
@@ -616,14 +616,14 @@ The default is
 .B on with > 32MB VRAM, off with < 32MB.
 .TP
 .BI "Option \*qZaphodHeads\*q \*q" string \*q
-Specify the randr outputs to use with zaphod mode. If you do not specify
-an outputs, the driver will pick them automatically.
+Specify the randr output(s) to use with zaphod mode for a particular driver
+instance.  If you use this option you most use this option for all instances
+of the driver.
 .br
 For example:
 .B
 Option \*qZaphodHeads\*q \*qLVDS,VGA-0\*q
-will assign xrandr output LVDS to the first instance of the driver and
-VGA-0 to the second instance.
+will assign xrandr outputs LVDS and VGA-0 to this instance of the driver.
 
 .SH TEXTURED VIDEO ATTRIBUTES
 The driver supports the following X11 Xv attributes for Textured Video.
diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index bb219cf9..ed3d9275 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -900,7 +900,7 @@ drmmode_output_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
 	}
 
 	if ((s = xf86GetOptValString(info->Options, OPTION_ZAPHOD_HEADS))) {
-		if (!RADEONZaphodStringMatches(pScrn, info->IsPrimary, s, name))
+		if (!RADEONZaphodStringMatches(pScrn, s, name))
 		    goto out_free_encoders;
 	}
 
diff --git a/src/radeon.h b/src/radeon.h
index c0b5d7aa..56695f91 100644
--- a/src/radeon.h
+++ b/src/radeon.h
@@ -1231,8 +1231,7 @@ extern void RADEONInitMemMapRegisters(ScrnInfoPtr pScrn, RADEONSavePtr save,
 extern void RADEONRestoreMemMapRegisters(ScrnInfoPtr pScrn,
 					 RADEONSavePtr restore);
 extern Bool
-RADEONZaphodStringMatches(ScrnInfoPtr pScrn, Bool is_primary,
-			  const char *s, char *output_name);
+RADEONZaphodStringMatches(ScrnInfoPtr pScrn, const char *s, char *output_name);
 
 Bool RADEONGetRec(ScrnInfoPtr pScrn);
 void RADEONFreeRec(ScrnInfoPtr pScrn);
diff --git a/src/radeon_driver.c b/src/radeon_driver.c
index 9a4cb9a5..e11c5e96 100644
--- a/src/radeon_driver.c
+++ b/src/radeon_driver.c
@@ -2788,18 +2788,18 @@ RADEONPreInitBIOS(ScrnInfoPtr pScrn, xf86Int10InfoPtr  pInt10)
 }
 
 Bool
-RADEONZaphodStringMatches(ScrnInfoPtr pScrn, Bool is_primary,
-			  const char *s, char *output_name)
+RADEONZaphodStringMatches(ScrnInfoPtr pScrn, const char *s, char *output_name)
 {
-    int i = 0, second = 0;
-    char s1[20], s2[20];
+    int i = 0;
+    char s1[20];
 
     do {
 	switch(*s) {
 	case ',':
 	    s1[i] = '\0';
 	    i = 0;
-	    second = 1;
+	    if (strcmp(s1, output_name) == 0)
+		return TRUE;
 	    break;
 	case ' ':
 	case '\t':
@@ -2807,23 +2807,15 @@ RADEONZaphodStringMatches(ScrnInfoPtr pScrn, Bool is_primary,
 	case '\r':
 	    break;
 	default:
-	    if (second)
-		s2[i] = *s;
-	    else
-		s1[i] = *s;
+	    s1[i] = *s;
 	    i++;
 	    break;
 	}
     } while(*s++);
-    s2[i] = '\0';
 
-    if (is_primary) {
-	if (strcmp(s1, output_name) == 0)
-	    return TRUE;
-    } else {
-	if (strcmp(s2, output_name) == 0)
-	    return TRUE;
-    }
+    s1[i] = '\0';
+    if (strcmp(s1, output_name) == 0)
+	return TRUE;
 
     return FALSE;
 }
@@ -2832,20 +2824,13 @@ static void RADEONFixZaphodOutputs(ScrnInfoPtr pScrn)
 {
     RADEONInfoPtr info = RADEONPTR(pScrn);
     xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(pScrn);
-    xf86OutputPtr output;
     int o;
     char *s;
 
     if ((s = xf86GetOptValString(info->Options, OPTION_ZAPHOD_HEADS))) {
-	for (o = 0; o < config->num_output; o++) {
-	    if (RADEONZaphodStringMatches(pScrn, info->IsPrimary, s, config->output[o]->name))
-		output = config->output[o];
-	}
-	while (config->num_output > 1) {
-	    if (config->output[0] != output)
-		xf86OutputDestroy(config->output[0]);
-	    else if (config->output[1] != output)
-		xf86OutputDestroy(config->output[1]);
+	for (o = config->num_output; o > 0; o--) {
+	    if (!RADEONZaphodStringMatches(pScrn, s, config->output[o - 1]->name))
+		xf86OutputDestroy(config->output[o - 1]);
 	}
     } else {
 	if (info->IsPrimary) {
-- 
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