DP controller state can not switch from video ready state to transmit phy pattern state at run time. DP mainlink has to be teared down followed by reset controller to default state to have DP controller switch to transmit phy test pattern state and start generate specified phy test pattern to sinker once main link setup again.
Changes in v2: -- correct Fixes's commit id
Fixes: 52352fe2f866 ("drm/msm/dp: use dp_ctrl_off_link_stream during PHY compliance test run") Signed-off-by: Kuogee Hsieh quic_khsieh@quicinc.com Reviewed-by: Stephen Boyd swboyd@chromium.org --- drivers/gpu/drm/msm/dp/dp_ctrl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 5356856..193cc1a 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -1532,7 +1532,7 @@ static int dp_ctrl_process_phy_test_request(struct dp_ctrl_private *ctrl) * running. Add the global reset just before disabling the * link clocks and core clocks. */ - ret = dp_ctrl_off_link_stream(&ctrl->dp_ctrl); + ret = dp_ctrl_off(&ctrl->dp_ctrl); if (ret) { DRM_ERROR("failed to disable DP controller\n"); return ret;