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authorKrzysztof Helt <krzysztof.h1@wp.pl>2008-07-23 21:31:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 10:47:36 -0700
commit13b0de49f52ec8638b3e3e59192a959b35214d9e (patch)
tree47b18cb770849ee173e9d6c306e42581917a8425 /drivers/video/tridentfb.c
parent5cf138457af20b0ef79d8c249381927718ca1417 (diff)
downloadlinux-13b0de49f52ec8638b3e3e59192a959b35214d9e.tar.gz
tridentfb: fix console freeze when switching from X11
This patch fixes two problems when acceleration is enabled: - console switch from the Xorg locks up the computer because the Xorg code locks some registers and disables the mmio mode, so reenable these in the tridentfb_set_par() and enable_mmio() - blacklist the Image975 chipset from setting PCI burst mode. This helps with random lock ups of the framebuffer on this chip. The same fix is probably needed for the Xorg as well. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/tridentfb.c')
-rw-r--r--drivers/video/tridentfb.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/video/tridentfb.c b/drivers/video/tridentfb.c
index b6065effc5e..da4b464cbdb 100644
--- a/drivers/video/tridentfb.c
+++ b/drivers/video/tridentfb.c
@@ -558,13 +558,15 @@ static inline void write3CE(struct tridentfb_par *par, int reg,
vga_mm_wgfx(par->io_virt, reg, val);
}
-static void enable_mmio(void)
+static void enable_mmio(struct tridentfb_par *par)
{
/* Goto New Mode */
vga_io_rseq(0x0B);
/* Unprotect registers */
vga_io_wseq(NewMode1, 0x80);
+ if (!is_oldprotect(par->chip_id))
+ vga_io_wseq(Protection, 0x92);
/* Enable MMIO */
outb(PCIReg, 0x3D4);
@@ -578,6 +580,8 @@ static void disable_mmio(struct tridentfb_par *par)
/* Unprotect registers */
vga_mm_wseq(par->io_virt, NewMode1, 0x80);
+ if (!is_oldprotect(par->chip_id))
+ vga_mm_wseq(par->io_virt, Protection, 0x92);
/* Disable MMIO */
t_outb(par, PCIReg, 0x3D4);
@@ -995,6 +999,7 @@ static int tridentfb_set_par(struct fb_info *info)
vblankend /= 2;
}
+ enable_mmio(par);
crtc_unlock(par);
write3CE(par, CyberControl, 8);
tmp = 0xEB;
@@ -1116,7 +1121,7 @@ static int tridentfb_set_par(struct fb_info *info)
if (!is_xp(par->chip_id))
write3X4(par, Performance, read3X4(par, Performance) | 0x10);
/* MMIO & PCI read and write burst enable */
- if (par->chip_id != TGUI9440)
+ if (par->chip_id != TGUI9440 && par->chip_id != IMAGE975)
write3X4(par, PCIReg, read3X4(par, PCIReg) | 0x06);
vga_mm_wseq(par->io_virt, 0, 3);
@@ -1403,7 +1408,7 @@ static int __devinit trident_pci_probe(struct pci_dev *dev,
goto out_unmap1;
}
- enable_mmio();
+ enable_mmio(default_par);
/* setup framebuffer memory */
tridentfb_fix.smem_start = pci_resource_start(dev, 0);