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drm/i915: Sanitize the TypeC connect/detect sequences

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Make the order during detection more consistent: first reset the TypeC
port mode if needed (adding new helpers for this), then detect any
connected sink.

To check if a port mode reset is needed determine first the target port
mode based on the live status if a sink is already connected or the
PHY status complete flag otherwise.

Add a WARN in legacy mode if unexpectedly we can't set the unsafe mode
or if the FIA doesn't provide the 4 lanes required.

Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190628143635.22066-13-imre.deak@intel.com
This commit is contained in:
Imre Deak 2019-06-28 17:36:24 +03:00
parent 424f109f5c
commit 1cd5ef6ee2
1 changed files with 48 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

98
drivers/gpu/drm/i915/display/intel_tc.c
View File

@ -181,41 +181,43 @@ static bool icl_tc_phy_set_safe_mode(struct intel_digital_port *dig_port,
* will require a lot of coordination with user space and thorough testing for
* the extra possible cases.
*/
static bool icl_tc_phy_connect(struct intel_digital_port *dig_port)
static void icl_tc_phy_connect(struct intel_digital_port *dig_port)
{
u32 live_status_mask;
if (dig_port->tc_mode != TC_PORT_LEGACY &&
dig_port->tc_mode != TC_PORT_DP_ALT)
return true;
if (!icl_tc_phy_status_complete(dig_port)) {
DRM_DEBUG_KMS("Port %s: PHY not ready\n",
dig_port->tc_port_name);
WARN_ON(dig_port->tc_legacy_port);
return false;
goto out_set_tbt_alt_mode;
}
if (!icl_tc_phy_set_safe_mode(dig_port, false))
return false;
if (!icl_tc_phy_set_safe_mode(dig_port, false) &&
!WARN_ON(dig_port->tc_legacy_port))
goto out_set_tbt_alt_mode;
if (dig_port->tc_mode == TC_PORT_LEGACY)
return true;
if (dig_port->tc_legacy_port) {
WARN_ON(intel_tc_port_fia_max_lane_count(dig_port) != 4);
dig_port->tc_mode = TC_PORT_LEGACY;
live_status_mask = tc_port_live_status_mask(dig_port);
return;
}
/*
* Now we have to re-check the live state, in case the port recently
* became disconnected. Not necessary for legacy mode.
*/
if (!(live_status_mask & BIT(TC_PORT_DP_ALT))) {
if (!(tc_port_live_status_mask(dig_port) & BIT(TC_PORT_DP_ALT))) {
DRM_DEBUG_KMS("Port %s: PHY sudden disconnect\n",
dig_port->tc_port_name);
icl_tc_phy_disconnect(dig_port);
return false;
goto out_set_safe_mode;
}
return true;
dig_port->tc_mode = TC_PORT_DP_ALT;
return;
out_set_safe_mode:
icl_tc_phy_set_safe_mode(dig_port, true);
out_set_tbt_alt_mode:
dig_port->tc_mode = TC_PORT_TBT_ALT;
}
/*
@ -236,27 +238,37 @@ void icl_tc_phy_disconnect(struct intel_digital_port *dig_port)
default:
MISSING_CASE(dig_port->tc_mode);
}
}
DRM_DEBUG_KMS("Port %s: mode %s disconnected\n",
static enum tc_port_mode
intel_tc_port_get_target_mode(struct intel_digital_port *dig_port)
{
u32 live_status_mask = tc_port_live_status_mask(dig_port);
if (live_status_mask)
return fls(live_status_mask) - 1;
return icl_tc_phy_status_complete(dig_port) &&
dig_port->tc_legacy_port ? TC_PORT_LEGACY :
TC_PORT_TBT_ALT;
}
static void intel_tc_port_reset_mode(struct intel_digital_port *dig_port)
{
enum tc_port_mode old_tc_mode = dig_port->tc_mode;
icl_tc_phy_disconnect(dig_port);
icl_tc_phy_connect(dig_port);
DRM_DEBUG_KMS("Port %s: TC port mode reset (%s -> %s)\n",
dig_port->tc_port_name,
tc_port_mode_name(old_tc_mode),
tc_port_mode_name(dig_port->tc_mode));
}
static void icl_update_tc_port_type(struct drm_i915_private *dev_priv,
struct intel_digital_port *intel_dig_port,
u32 live_status_mask)
static bool intel_tc_port_needs_reset(struct intel_digital_port *dig_port)
{
enum tc_port_mode old_mode = intel_dig_port->tc_mode;
if (!live_status_mask)
return;
intel_dig_port->tc_mode = fls(live_status_mask) - 1;
if (old_mode != intel_dig_port->tc_mode)
DRM_DEBUG_KMS("Port %s: port has mode %s\n",
intel_dig_port->tc_port_name,
tc_port_mode_name(intel_dig_port->tc_mode));
return intel_tc_port_get_target_mode(dig_port) != dig_port->tc_mode;
}
/*
@ -271,24 +283,10 @@ static void icl_update_tc_port_type(struct drm_i915_private *dev_priv,
*/
bool intel_tc_port_connected(struct intel_digital_port *dig_port)
{
struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
u32 live_status_mask = tc_port_live_status_mask(dig_port);
if (intel_tc_port_needs_reset(dig_port))
intel_tc_port_reset_mode(dig_port);
/*
* The spec says we shouldn't be using the ISR bits for detecting
* between TC and TBT. We should use DFLEXDPSP.
*/
if (!live_status_mask && !dig_port->tc_legacy_port) {
icl_tc_phy_disconnect(dig_port);
return false;
}
icl_update_tc_port_type(dev_priv, dig_port, live_status_mask);
if (!icl_tc_phy_connect(dig_port))
return false;
return true;
return tc_port_live_status_mask(dig_port) & BIT(dig_port->tc_mode);
}
void intel_tc_port_init(struct intel_digital_port *dig_port, bool is_legacy)