1 files changed, 17 insertions, 1 deletions

diff --git a/drivers/video/geode/display_gx.c b/drivers/video/geode/display_gx.c
index 1e82ecc367dd..e759895bf3d3 100644
--- a/drivers/video/geode/display_gx.c
+++ b/drivers/video/geode/display_gx.c
@@ -25,7 +25,23 @@ unsigned int gx_frame_buffer_size(void)
 {
         unsigned int val;
 
-        /* FB size is reported by a virtual register */
+        if (!geode_has_vsa2()) {
+                uint32_t hi, lo;
+
+                /* The number of pages is (PMAX - PMIN)+1 */
+                rdmsr(MSR_GLIU_P2D_RO0, lo, hi);
+
+                /* PMAX */
+                val = ((hi & 0xff) << 12) | ((lo & 0xfff00000) >> 20);
+                /* PMIN */
+                val -= (lo & 0x000fffff);
+                val += 1;
+
+                /* The page size is 4k */
+                return (val << 12);
+        }
+
+        /* FB size can be obtained from the VSA II */
         /* Virtual register class = 0x02 */
         /* VG_MEM_SIZE(512Kb units) = 0x00 */