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path: root/drivers/video/geode/display_gx.c
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Diffstat (limited to 'drivers/video/geode/display_gx.c')
-rw-r--r--drivers/video/geode/display_gx.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/video/geode/display_gx.c b/drivers/video/geode/display_gx.c
index 825c3405f5c..0245169366b 100644
--- a/drivers/video/geode/display_gx.c
+++ b/drivers/video/geode/display_gx.c
@@ -21,10 +21,19 @@
#include "geodefb.h"
#include "display_gx.h"
-int gx_frame_buffer_size(void)
+unsigned int gx_frame_buffer_size(void)
{
- /* Assuming 16 MiB. */
- return 16*1024*1024;
+ unsigned int val;
+
+ /* FB size is reported by a virtual register */
+ /* Virtual register class = 0x02 */
+ /* VG_MEM_SIZE(512Kb units) = 0x00 */
+
+ outw(0xFC53, 0xAC1C);
+ outw(0x0200, 0xAC1C);
+
+ val = (unsigned int)(inw(0xAC1E)) & 0xFFl;
+ return (val << 19);
}
int gx_line_delta(int xres, int bpp)