[PATCH 1/5] s3fb: maximize virtual vertical size for fast scrolling
From: Ondrej Zary <hidden>
Date: 2011-03-01 19:18:21
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Maximize virtual vertical framebuffer size during init to allow fast scrolling (accelerated by panning). Signed-off-by: Ondrej Zary <redacted>
--- 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");
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Ondrej Zary