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authorOndrej Zary <linux@rainbow-software.org>2011-03-01 19:18:08 +0000
committerPaul Mundt <lethal@linux-sh.org>2011-03-22 15:49:45 +0900
commit99d054d8253b1dbc6ab2d4ebcb25ad4a4e6ba1c8 (patch)
tree7571a36ec5b16ca6abd98c9c107f37b35d3faa34 /drivers/video/s3fb.c
parent6a2f6d5e970afbc1b8b08bafae9d9138a3206960 (diff)
s3fb: maximize virtual vertical size for fast scrolling
Maximize virtual vertical framebuffer size during init to allow fast scrolling (accelerated by panning). Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Acked-by: Ondrej Zajicek <santiago@crfreenet.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/video/s3fb.c')
-rw-r--r--drivers/video/s3fb.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/video/s3fb.c b/drivers/video/s3fb.c
index 55a94b94a326..9f9be9f37f2e 100644
--- a/drivers/video/s3fb.c
+++ b/drivers/video/s3fb.c
@@ -1053,6 +1053,14 @@ static int __devinit s3_pci_probe(struct pci_dev *dev, const struct pci_device_i
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");

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