diff options
author | David S. Miller <davem@davemloft.net> | 2017-06-15 11:31:37 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2017-06-15 11:59:32 -0400 |
commit | 0ddead90b223faae475f3296a50bf574b7f7c69a (patch) | |
tree | e729c7fcdc7e3697f7fae2f3028ed0d11931c425 /drivers/gpu/drm/i915/intel_display.c | |
parent | f7aec129a356ad049edddcb7e77b04a474fcf41f (diff) | |
parent | a090bd4ff8387c409732a8e059fbf264ea0bdd56 (diff) | |
download | linux-stable-0ddead90b223faae475f3296a50bf574b7f7c69a.tar.gz linux-stable-0ddead90b223faae475f3296a50bf574b7f7c69a.tar.bz2 linux-stable-0ddead90b223faae475f3296a50bf574b7f7c69a.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
The conflicts were two cases of overlapping changes in
batman-adv and the qed driver.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
-rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 3cabe52a4e3b..569717a12723 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -12203,6 +12203,15 @@ static void update_scanline_offset(struct intel_crtc *crtc) * type. For DP ports it behaves like most other platforms, but on HDMI * there's an extra 1 line difference. So we need to add two instead of * one to the value. + * + * On VLV/CHV DSI the scanline counter would appear to increment + * approx. 1/3 of a scanline before start of vblank. Unfortunately + * that means we can't tell whether we're in vblank or not while + * we're on that particular line. We must still set scanline_offset + * to 1 so that the vblank timestamps come out correct when we query + * the scanline counter from within the vblank interrupt handler. + * However if queried just before the start of vblank we'll get an + * answer that's slightly in the future. */ if (IS_GEN2(dev_priv)) { const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode; |