diff options
| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2010-08-19 00:20:54 +0400 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-08-22 09:59:23 +0400 |
| commit | 9d0498a2bf7455159b317f19531a3e5db2ecc9c4 (patch) | |
| tree | 41f2a8b1013d2ee12852d8885b9952120f3d6ebb /drivers/gpu/drm/i915/intel_crt.c | |
| parent | d240f20f545fa4ed78ce48d1eb62ab529f2b1467 (diff) | |
| download | linux-9d0498a2bf7455159b317f19531a3e5db2ecc9c4.tar.xz | |
drm/i915: wait for actual vblank, not just 20ms
Waiting for a hard coded 20ms isn't always enough to make sure a vblank
period has actually occurred, so add code to make sure we really have
passed through a vblank period (or that the pipe is off when disabling).
This prevents problems with mode setting and link training, and seems to
fix a bug like https://bugs.freedesktop.org/show_bug.cgi?id=29278, but
on an HP 8440p instead. Hopefully also fixes
https://bugs.freedesktop.org/show_bug.cgi?id=29141.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_crt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_crt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index c43176d77549..eb31fdf758e8 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -328,7 +328,7 @@ intel_crt_load_detect(struct drm_crtc *crtc, struct intel_encoder *intel_encoder I915_WRITE(pipeconf_reg, pipeconf | PIPECONF_FORCE_BORDER); /* Wait for next Vblank to substitue * border color for Color info */ - intel_wait_for_vblank(dev); + intel_wait_for_vblank(dev, pipe); st00 = I915_READ8(VGA_MSR_WRITE); status = ((st00 & (1 << 4)) != 0) ? connector_status_connected : |