When reading out CRC's we wait for a vblank on intel_dp_sink_crc_start() function. When we start reading out CRC's in intel_dp_sink_crc() loop we first wait for a vblank yielding that all in all we end up waiting two vblanks on the first iteration round. Therefore, let's move the intel_wait_for_vblank() as the last routine that we do in an iteration loop in intel_dp_sink_crc(). Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103166 Signed-off-by: Mika Kahola <mika.kahola@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_dp.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 62f82c4..6eb97fa 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3972,13 +3972,14 @@ int intel_dp_sink_crc(struct intel_dp *intel_dp, struct intel_crtc_state *crtc_s return ret; do { - intel_wait_for_vblank(dev_priv, intel_crtc->pipe); - if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK_MISC, &buf) < 0) { ret = -EIO; goto stop; } + + intel_wait_for_vblank(dev_priv, intel_crtc->pipe); + count = buf & DP_TEST_COUNT_MASK; } while (--attempts && count == 0); -- 2.7.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
