gnu: xf86-video-savage: Fix FTBFS with xorg-server >= 1.20.

* gnu/packages/patches/xf86-video-savage-xorg-compat.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/xorg.scm (xf86-video-savage)[source](patches): Use it.

gnu/local.mk

@@ -1214,6 +1214,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/xf86-video-geode-glibc-2.20.patch	\
   %D%/packages/patches/xf86-video-i128-remove-mibstore.patch	\
   %D%/packages/patches/xf86-video-mach64-glibc-2.20.patch	\
+  %D%/packages/patches/xf86-video-savage-xorg-compat.patch 	\
   %D%/packages/patches/xf86-video-siliconmotion-fix-ftbfs.patch \
   %D%/packages/patches/xf86-video-sis-xorg-compat.patch 	\
   %D%/packages/patches/xf86-video-tga-remove-mibstore.patch	\

gnu/packages/patches/xf86-video-savage-xorg-compat.patch

@@ -0,0 +1,33 @@
+Fix build against xorg-server >= 1.20.
+
+Patch taken from upstream:
+https://cgit.freedesktop.org/xorg/driver/xf86-video-savage/commit/?id=0ece556daa8a88771b669d8104396abd9166d2d0
+
+diff --git a/src/savage_driver.c b/src/savage_driver.c
+index 58a294d..3cda923 100644
+--- a/src/savage_driver.c
++++ b/src/savage_driver.c
+@@ -2034,8 +2034,6 @@ static Bool SavagePreInit(ScrnInfoPtr pScrn, int flags)
+     xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "Detected current MCLK value of %1.3f MHz\n",
+ 	       mclk / 1000.0);
+ 
+-    pScrn->maxHValue = 2048 << 3;	/* 11 bits of h_total 8-pixel units */
+-    pScrn->maxVValue = 2048;		/* 11 bits of v_total */
+     pScrn->virtualX = pScrn->display->virtualX;
+     pScrn->virtualY = pScrn->display->virtualY;
+ 
+@@ -3637,6 +3635,14 @@ static ModeStatus SavageValidMode(SCRN_ARG_TYPE arg, DisplayModePtr pMode,
+        (pMode->VDisplay > psav->PanelY)))
+ 	    return MODE_PANEL;
+ 
++    /* 11 bits of h_total 8-pixel units */
++    if (pMode->HTotal > (2048 << 3))
++	return MODE_BAD_HVALUE;
++
++    /* 11 bits of v_total */
++    if (pMode->VTotal > 2048)
++	return MODE_BAD_VVALUE;
++
+     if (psav->UseBIOS) {
+ 	refresh = SavageGetRefresh(pMode);
+         return (SavageMatchBiosMode(pScrn,pMode->HDisplay,

gnu/packages/xorg.scm

@@ -3214,6 +3214,7 @@ This driver is intended for ATI Rage 128 based cards.")
                "mirror://xorg/individual/driver/xf86-video-savage-"
                version
                ".tar.bz2"))
+        (patches (search-patches "xf86-video-savage-xorg-compat.patch"))
         (sha256
           (base32
            "11pcrsdpdrwk0mrgv83s5nsx8a9i4lhmivnal3fjbrvi3zdw94rc"))))