1 files changed, 28 insertions, 2 deletions

diff --git a/drivers/video/s3fb.c b/drivers/video/s3fb.c
index 946a949f4c7d..2c80246b18b8 100644
--- a/drivers/video/s3fb.c
+++ b/drivers/video/s3fb.c
@@ -727,7 +727,7 @@ static int s3fb_set_par(struct fb_info *info)
         if (par->chip == CHIP_988_VIRGE_VX) {
                 vga_wcrt(par->state.vgabase, 0x50, 0x00);
                 vga_wcrt(par->state.vgabase, 0x67, 0x50);
-
+                msleep(10); /* screen remains blank sometimes without this */
                 vga_wcrt(par->state.vgabase, 0x63, (mode <= 2) ? 0x90 : 0x09);
                 vga_wcrt(par->state.vgabase, 0x66, 0x90);
         }
@@ -901,7 +901,8 @@ static int s3fb_set_par(struct fb_info *info)
 
         /* Set Data Transfer Position */
         hsstart = ((info->var.xres + info->var.right_margin) * hmul) / 8;
-        value = clamp((htotal + hsstart + 1) / 2, hsstart + 4, htotal + 1);
+        /* + 2 is needed for Virge/VX, does no harm on other cards */
+        value = clamp((htotal + hsstart + 1) / 2 + 2, hsstart + 4, htotal + 1);
         svga_wcrt_multi(par->state.vgabase, s3_dtpc_regs, value);
 
         memset_io(info->screen_base, 0x00, screen_size);
@@ -1216,6 +1217,31 @@ static int __devinit s3_pci_probe(struct pci_dev *dev, const struct pci_device_i
                         info->screen_size = 2 << 20;
                         break;
                 }
+        } else if (par->chip == CHIP_988_VIRGE_VX) {
+                switch ((regval & 0x60) >> 5) {
+                case 0: /* 2MB */
+                        info->screen_size = 2 << 20;
+                        break;
+                case 1: /* 4MB */
+                        info->screen_size = 4 << 20;
+                        break;
+                case 2: /* 6MB */
+                        info->screen_size = 6 << 20;
+                        break;
+                case 3: /* 8MB */
+                        info->screen_size = 8 << 20;
+                        break;
+                }
+                /* off-screen memory */
+                regval = vga_rcrt(par->state.vgabase, 0x37);
+                switch ((regval & 0x60) >> 5) {
+                case 1: /* 4MB */
+                        info->screen_size -= 4 << 20;
+                        break;
+                case 2: /* 2MB */
+                        info->screen_size -= 2 << 20;
+                        break;
+                }
         } else
                 info->screen_size = s3_memsizes[regval >> 5] << 10;
         info->fix.smem_len = info->screen_size;