diff options
| author | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2015-11-05 10:50:19 -0800 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-11-18 11:21:50 +0100 |
| commit | d72f9d919a60e5096105237a72f046b7a20fb53f (patch) | |
| tree | 49b1567648709da74c95288918d9b747d2471c7b /drivers/gpu/drm/i915/intel_dp.c | |
| parent | a03bc7cd633760ae0312327b6e30ec8fe962a798 (diff) | |
| download | lwn-d72f9d919a60e5096105237a72f046b7a20fb53f.tar.gz lwn-d72f9d919a60e5096105237a72f046b7a20fb53f.zip | |
drm/i915: Allow 1 vblank to let Sink CRC calculation to start or stop.
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 <rodrigo.vivi@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 9d90bc966533..3ffedd897fff 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3949,6 +3949,7 @@ 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; @@ -3966,6 +3967,7 @@ 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: hsw_enable_ips(intel_crtc); @@ -3975,6 +3977,7 @@ 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; @@ -4004,6 +4007,7 @@ 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; } |