From b298ba5f51fca1c8204ec7448eb767fafb899ce6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= <jose.souza@intel.com>
Date: Tue, 30 Oct 2018 14:57:47 -0700
Subject: drm/i915/icl: Set TC type to unknown in the disconnection flow
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Git-commit: b298ba5f51fca1c8204ec7448eb767fafb899ce6
Patch-mainline: v5.0-rc1
References: fate#326289
Otherwise it would be in a inconsistent state as port is disconnected
but with a valid tc type.
Also setting it to unknown will earlier return
icl_tc_phy_disconnect() for any future calls to
intel_digital_port_connected(), this way we don't need to check if
port is marked as safe everytime.
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181030215750.28213-2-jose.souza@intel.com
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/i915/intel_dp.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 03b8e5104ead..5973f77f9740 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5102,21 +5102,24 @@ static void icl_tc_phy_disconnect(struct drm_i915_private *dev_priv,
struct intel_digital_port *dig_port)
{
enum tc_port tc_port = intel_port_to_tc(dev_priv, dig_port->base.port);
- u32 val;
- if (dig_port->tc_type != TC_PORT_LEGACY &&
- dig_port->tc_type != TC_PORT_TYPEC)
+ if (dig_port->tc_type == TC_PORT_UNKNOWN)
return;
/*
- * This function may be called many times in a row without an HPD event
- * in between, so try to avoid the write when we can.
+ * TBT disconnection flow is read the live status, what was done in
+ * caller.
*/
- val = I915_READ(PORT_TX_DFLEXDPCSSS);
- if (val & DP_PHY_MODE_STATUS_NOT_SAFE(tc_port)) {
+ if (dig_port->tc_type == TC_PORT_TYPEC ||
+ dig_port->tc_type == TC_PORT_LEGACY) {
+ u32 val;
+
+ val = I915_READ(PORT_TX_DFLEXDPCSSS);
val &= ~DP_PHY_MODE_STATUS_NOT_SAFE(tc_port);
I915_WRITE(PORT_TX_DFLEXDPCSSS, val);
}
+
+ dig_port->tc_type = TC_PORT_UNKNOWN;
}
/*
--
2.20.1