gxfb/lxfb: use VSA definitions when fetching framebuffer size

..Rather than using magic constants.
Signed-off-by: NAndres Salomon <dilinger@debian.org>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/geode/display_gx.c

@@ -17,6 +17,7 @@
 #include <asm/io.h>
 #include <asm/div64.h>
 #include <asm/delay.h>
+#include <asm/geode.h>
 
 #include "gxfb.h"
 
@@ -28,10 +29,10 @@ unsigned int gx_frame_buffer_size(void)
 	/* Virtual register class = 0x02 */
 	/* VG_MEM_SIZE(512Kb units) = 0x00 */
 
-	outw(0xFC53, 0xAC1C);
-	outw(0x0200, 0xAC1C);
+	outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
+	outw(VSA_VR_MEM_SIZE, VSA_VRC_INDEX);
 
-	val = (unsigned int)(inw(0xAC1E)) & 0xFFl;
+	val = (unsigned int)(inw(VSA_VRC_DATA)) & 0xFFl;
 	return (val << 19);
 }
 

drivers/video/geode/lxfb_ops.c

@@ -333,10 +333,10 @@ unsigned int lx_framebuffer_size(void)
 	/* Virtual Register Class    = 0x02                     */
 	/* VG_MEM_SIZE (1MB units)   = 0x00                     */
 
-	outw(0xFC53, 0xAC1C);
-	outw(0x0200, 0xAC1C);
+	outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
+	outw(VSA_VR_MEM_SIZE, VSA_VRC_INDEX);
 
-	val = (unsigned int)(inw(0xAC1E)) & 0xFE;
+	val = (unsigned int)(inw(VSA_VRC_DATA)) & 0xFE;
 	return (val << 20);
 }
 

include/asm-x86/geode.h

@@ -109,6 +109,7 @@ extern int geode_get_dev_base(unsigned int dev);
 #define VSA_VRC_DATA		0xAC1E
 #define VSA_VR_UNLOCK		0xFC53	/* unlock virtual register */
 #define VSA_VR_SIGNATURE	0x0003
+#define VSA_VR_MEM_SIZE		0x0200
 #define VSA_SIG			0x4132	/* signature is ascii 'VSA2' */
 
 /* GPIO */