Maximize virtual vertical framebuffer size during init to allow fast scrolling
(accelerated by panning).
Signed-off-by: Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>
--- linux-2.6.38-rc4-/drivers/video/s3fb.c 2011-02-20 19:11:28.000000000 +0100
+++ linux-2.6.38-rc4/drivers/video/s3fb.c 2011-02-20 19:17:04.000000000 +0100
@@ -1060,6 +1060,14 @@ static int __devinit s3_pci_probe(struct
goto err_find_mode;
}
+ /* maximize virtual vertical size for fast scrolling */
+ info->var.yres_virtual = info->fix.smem_len * 8 /
+ (info->var.bits_per_pixel * info->var.xres_virtual);
+ if (info->var.yres_virtual < info->var.yres) {
+ dev_err(info->device, "virtual vertical size smaller than real\n");
+ goto err_find_mode;
+ }
+
rc = fb_alloc_cmap(&info->cmap, 256, 0);
if (rc < 0) {
dev_err(info->device, "cannot allocate colormap\n");
--
Ondrej Zary
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