diff options
| author | Andy Lutomirski <luto@MIT.EDU> | 2011-05-26 10:13:31 -0400 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2011-06-02 17:18:04 +0900 |
| commit | 3c004b4f7eab239e726c6dde0f6cfca46a96956b (patch) | |
| tree | 91992251a5ff8967159fcfd7802732e14369d9de | |
| parent | 0057f1809d44b26765ec2374e0107a2f8ab256f5 (diff) | |
| download | linux-3c004b4f7eab239e726c6dde0f6cfca46a96956b.tar.gz | |
efifb: Enable write-combining
Running fbcon on an uncached framebuffer is remarkably slow. So try to enable write combining in efifb. Without this patch, it takes 5.8 seconds from efifb probe to i915 probe (default options; no plymouth or quiet mode). With this patch, it only takes 1.7 seconds. That means we wasted over 4 seconds just writing to UC memory. Signed-off-by: Andy Lutomirski <luto@mit.edu> Signed-off-by: Peter Jones <pjones@redhat.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| -rw-r--r-- | drivers/video/efifb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/video/efifb.c b/drivers/video/efifb.c index fb205843c2c7..7f06247a21e8 100644 --- a/drivers/video/efifb.c +++ b/drivers/video/efifb.c @@ -413,7 +413,7 @@ static int __devinit efifb_probe(struct platform_device *dev) info->apertures->ranges[0].base = efifb_fix.smem_start; info->apertures->ranges[0].size = size_remap; - info->screen_base = ioremap(efifb_fix.smem_start, efifb_fix.smem_len); + info->screen_base = ioremap_wc(efifb_fix.smem_start, efifb_fix.smem_len); if (!info->screen_base) { printk(KERN_ERR "efifb: abort, cannot ioremap video memory " "0x%x @ 0x%lx\n", |