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audiohda: add intel sch models (thanks puddingpimp on #cat-v for sending a patch)

--- a/sys/src/9/pc/audiohda.c

+++ b/sys/src/9/pc/audiohda.c

@@ -1394,6 +1394,8 @@

 		case (0x8086 << 16) | 0x284b:	/* Intel ICH8 */

 		case (0x8086 << 16) | 0x293f:	/* Intel ICH9 (untested) */

 		case (0x8086 << 16) | 0x293e:	/* Intel P35 (untested) */

+		case (0x8086 << 16) | 0x811b:	/* Intel SCH (Pouslbo) */

+		case (0x8086 << 16) | 0x080a:	/* Intel SCH (Oaktrail) */

 		case (0x10de << 16) | 0x026c:	/* NVidia MCP51 (untested) */

 		case (0x10de << 16) | 0x0371:	/* NVidia MCP55 (untested) */

@@ -1497,6 +1499,14 @@

 		/* magic for ULI */

 		pcicfgw16(p, 0x40, pcicfgr16(p, 0x40) | 0x10);

 		pcicfgw32(p, PciBAR1, 0);

+	}

+	if(p->vid == 0x8086){

+		/* magic for Intel */

+		switch(p->did){

+		case 0x811b:	/* SCH */

+		case 0x080a:

+			pcicfgw16(p, 0x78, pcicfgr16(p, 0x78) & ~0x800);

+		}

 	}

 	if(p->vid == 0x1002){

 		/* magic for ATI */

-- 

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