drm/i915: fix gen4 gpu reset
While trying to fix up gen4 gpu reset in
commit f49f0586191fe16140410db0a46d43bdc690d6af
Author: Kenneth Graunke <kenneth@whitecape.org>
Date: Sat Sep 11 01:19:14 2010 -0700
drm/i915: Actually set the reset bit in i965_reset
a little confusion about when wait_for times out has been introduced -
wait for loops _until_ the condition is true.
This fixes gpu reset on my gm45, testing with my hangman code shows
that it's now fairly reliable - it only died after well over 100 reset
cycles.
Cc: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 133f101..77b7a50 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -707,7 +707,7 @@
{
u8 gdrst;
pci_read_config_byte(dev->pdev, I965_GDRST, &gdrst);
- return gdrst & 0x1;
+ return (gdrst & GRDOM_RESET_ENABLE) == 0;
}
static int i965_do_reset(struct drm_device *dev)