On Gen9 chromebooks, we are seeing the screen shows several large blue horizontal stripes over the top. Also, corruption happens when we switch from a chrome browser tab to VT2 mode(by pressing Ctrl+Alt+F2) and then back to chrome tab.
As per the display workaround #1200, FBC needs wait for vblank before enabling and before disabling FBC. Signed-off-by: Gaurav K Singh <[email protected]> --- drivers/gpu/drm/i915/display/intel_fbc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c index 16ed44bfd734..71f2568ea5a3 100644 --- a/drivers/gpu/drm/i915/display/intel_fbc.c +++ b/drivers/gpu/drm/i915/display/intel_fbc.c @@ -1097,6 +1097,8 @@ void intel_fbc_enable(struct intel_crtc *crtc, if (fbc->crtc == crtc) { WARN_ON(!crtc_state->enable_fbc); WARN_ON(fbc->active); + if (IS_GEN9(dev_priv)) + intel_wait_for_vblank(dev_priv, crtc->pipe); } goto out; } @@ -1137,8 +1139,11 @@ void intel_fbc_disable(struct intel_crtc *crtc) return; mutex_lock(&fbc->lock); - if (fbc->crtc == crtc) + if (fbc->crtc == crtc) { __intel_fbc_disable(dev_priv); + if (IS_GEN9(dev_priv)) + intel_wait_for_vblank(dev_priv, crtc->pipe); + } mutex_unlock(&fbc->lock); } -- 1.9.1 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
