[PATCH 7/9] i915: when kgdb is active display compression should be off
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From: Jason Wessel on 5 Aug 2010 10:50 If the HW compression is left on, the call backs from the HW will crash the kernel. The only time this code is called is when kernel mode setting is in use with kgdb and the kdb shell. The atomic display pipe handler callback will reset everything when kgdb restores kernel to the run state. Signed-off-by: Jason Wessel <jason.wessel(a)windriver.com> Acked-by: Jesse Barnes <jbarnes(a)virtuousgeek.org> CC: David Airlie <airlied(a)linux.ie> --- drivers/gpu/drm/i915/intel_display.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index eff28e5..714bf53 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1251,6 +1251,10 @@ static void intel_update_fbc(struct drm_crtc *crtc, goto out_disable; } + /* If the kernel debugger is active, always disable compression */ + if (in_dbg_master()) + goto out_disable; + if (intel_fbc_enabled(dev)) { /* We can re-enable it in this case, but need to update pitch */ if ((fb->pitch > dev_priv->cfb_pitch) || -- 1.6.4.rc1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |