[PATCH 10/23] drm/i915: Wait for TypeC PHY complete flag to clear in safe mode

From: Imre Deak <imre.deak@intel.com>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 10/23] drm/i915: Wait for TypeC PHY complete flag to clear in safe mode
Date: Tue,  4 Jun 2019 17:58:13 +0300	[thread overview]
Message-ID: <20190604145826.16424-11-imre.deak@intel.com> (raw)
In-Reply-To: <20190604145826.16424-1-imre.deak@intel.com>

The PHY satus complete flag normally clears when disconnecting the PHY
in DP-alt mode (achieved by switching to safe mode), so wait for the
flag to clear.

Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
---
 drivers/gpu/drm/i915/intel_tc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_tc.c b/drivers/gpu/drm/i915/intel_tc.c
index 3fdcfa2bbaee..84e0c06877ec 100644
--- a/drivers/gpu/drm/i915/intel_tc.c
+++ b/drivers/gpu/drm/i915/intel_tc.c
@@ -143,6 +143,10 @@ static void icl_tc_phy_set_safe_mode(struct intel_digital_port *dig_port,
 		val |= DP_PHY_MODE_STATUS_NOT_SAFE(tc_port);
 
 	I915_WRITE(PORT_TX_DFLEXDPCSSS, val);
+
+	if (enable && wait_for(!icl_tc_phy_status_complete(dig_port), 10))
+		DRM_DEBUG_DRIVER("Port %s: PHY complete clear timed out\n",
+				 tc_port_name(dev_priv, tc_port));
 }
 
 /*
-- 
2.17.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
