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drm/i915: Fix hibernate save/restore of VGA attribute regs

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In hibernate, we may end up calling the VGA save regs function twice, so we need to make sure it's idempotent.  That means leaving ARX in index mode after the first save operation.  Fixes hibernate on 965.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jesse Barnes 2008-01-28 21:05:22 -08:00 committed by Dave Airlie
parent 1f84e550a8
commit da636ad6a0
1 changed files with 2 additions and 0 deletions
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2
drivers/char/drm/i915_drv.c
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@ -160,6 +160,7 @@ static void i915_save_vga(struct drm_device *dev)
dev_priv->saveAR[i] = i915_read_ar(st01, i, 0);
inb(st01);
outb(dev_priv->saveAR_INDEX, VGA_AR_INDEX);
inb(st01);
/* Graphics controller registers */
for (i = 0; i < 9; i++)
@ -225,6 +226,7 @@ static void i915_restore_vga(struct drm_device *dev)
i915_write_ar(st01, i, dev_priv->saveAR[i], 0);
inb(st01); /* switch back to index mode */
outb(dev_priv->saveAR_INDEX | 0x20, VGA_AR_INDEX);
inb(st01);
/* VGA color palette registers */
outb(dev_priv->saveDACMASK, VGA_DACMASK);