According to VESA DP Spec, setting TEST_SINK_START (bit 0) of TEST_SINK (00270h) "Stop/Start calculating CRC on the next frame"
So let's wait at least 1 vblank to really say the calculation stopped or started. Signed-off-by: Rodrigo Vivi <[email protected]> --- drivers/gpu/drm/i915/intel_dp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 4feb47e..c0fa90a 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3802,6 +3802,7 @@ intel_dp_probe_mst(struct intel_dp *intel_dp) static int intel_dp_sink_crc_stop(struct intel_dp *intel_dp) { struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); + struct drm_device *dev = dig_port->base.base.dev; struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc); u8 buf; int ret = 0; @@ -3819,6 +3820,7 @@ static int intel_dp_sink_crc_stop(struct intel_dp *intel_dp) goto out; } + intel_wait_for_vblank(dev, intel_crtc->pipe); intel_dp->sink_crc.started = false; out: intel_ips_enable(intel_crtc); @@ -3828,6 +3830,7 @@ static int intel_dp_sink_crc_stop(struct intel_dp *intel_dp) static int intel_dp_sink_crc_start(struct intel_dp *intel_dp) { struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); + struct drm_device *dev = dig_port->base.base.dev; struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc); u8 buf; int ret; @@ -3857,6 +3860,7 @@ static int intel_dp_sink_crc_start(struct intel_dp *intel_dp) return -EIO; } + intel_wait_for_vblank(dev, intel_crtc->pipe); intel_dp->sink_crc.started = true; return 0; } -- 2.4.3 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
