[PATCH 1/5] s3fb: maximize virtual vertical size for fast scrolling

[PATCH 1/5] s3fb: maximize virtual vertical size for fast scrolling

[Ondrej Zary]

Maximize virtual vertical framebuffer size during init to allow fast scrolling 
(accelerated by panning).

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>

--- 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

Re: [PATCH 1/5] s3fb: maximize virtual vertical size for fast

[Ondrej Zajicek]

[-- Attachment #1: Type: text/plain, Size: 526 bytes --]

On Tue, Mar 01, 2011 at 08:18:08PM +0100, Ondrej Zary wrote:
> 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>

-- 
Elen sila lumenn' omentielvo

Ondrej 'SanTiago' Zajicek (email: santiago@crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 197 bytes --]