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authorMichael Chang <mchang@novell.com>2011-05-30 14:28:25 +0800
committerGreg Kroah-Hartman <gregkh@suse.de>2011-06-07 12:28:42 -0700
commitaaa5c677910d313ca1318c905c799c459c6f0078 (patch)
tree590f9ff7476d8590a27254ce0c023b2791b0b35e /drivers/staging
parent3ab8be53155617fa7ecc5b8cd259a458727a1d90 (diff)
staging: gma500: get control from firmware framebuffer if conflicts
Many Linux distributions would enable vesafb in order to display early stage boot splash. In this case, we will get garbled X Window screen if running X fbdev on psbfb. This is because fb0 is occupied by vesafb while psbfb is on fb1. They tried to drive the same pieces of hardware at the same time. With unmodified X start-up, it would try to use default fb0 framebuffer device and unfortunately it is now broken becaues fb1 supersedes it. We should let psbfb takeover framebuffer control from vesafb to get around this problem. See also commit : 4410f3910947dcea8672280b3adecd53cec4e85e Signed-off-by: Michael Chang <mchang@novell.com> Cc: Alan Cox <alan@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging')
-rw-r--r--drivers/staging/gma500/psb_fb.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/staging/gma500/psb_fb.c b/drivers/staging/gma500/psb_fb.c
index 99c03a2e06b..084c36bbfe8 100644
--- a/drivers/staging/gma500/psb_fb.c
+++ b/drivers/staging/gma500/psb_fb.c
@@ -441,6 +441,16 @@ static int psbfb_create(struct psb_fbdev *fbdev,
info->screen_size = size;
memset(info->screen_base, 0, size);
+ if (dev_priv->pg->stolen_size) {
+ info->apertures = alloc_apertures(1);
+ if (!info->apertures) {
+ ret = -ENOMEM;
+ goto out_err0;
+ }
+ info->apertures->ranges[0].base = dev->mode_config.fb_base;
+ info->apertures->ranges[0].size = dev_priv->pg->stolen_size;
+ }
+
drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
sizes->fb_width, sizes->fb_height);