diff options
| author | Imre Deak <imre.deak@intel.com> | 2020-03-30 12:54:25 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2020-04-06 17:53:56 +0300 |
| commit | b4df5405f3e67e408554c9fd837faa3789b2ac32 (patch) | |
| tree | b9416e4a23d683a18ccbbf5233a46648c8fed258 /drivers/gpu/drm/i915 | |
| parent | 8c8919c7c99f097c9e6a441486c1c263277288b0 (diff) | |
| download | linux-b4df5405f3e67e408554c9fd837faa3789b2ac32.tar.xz | |
drm/i915: Extend hotplug detect retry on TypeC connectors to 5 seconds
On TypeC ports if a sink deasserts/reasserts its HPD signal, generating
a hotplug interrupt without the sink getting unplugged/replugged from
the connector, there can be an up to 3 seconds delay until the AUX
channel gets functional. To avoid detection failures this delay causes
retry the detection for 5 seconds.
I noticed this on ICL/TGL RVPs and a DELL XPS 13 7390 ICL laptop.
References: https://gitlab.freedesktop.org/drm/intel/issues/1067
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200330095425.29113-2-imre.deak@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_ddi.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 1bc6bfb2511e..be6c61bcbc9c 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -4520,7 +4520,10 @@ static enum intel_hotplug_state intel_ddi_hotplug(struct intel_encoder *encoder, struct intel_connector *connector) { + struct drm_i915_private *i915 = to_i915(encoder->base.dev); struct intel_digital_port *dig_port = enc_to_dig_port(encoder); + enum phy phy = intel_port_to_phy(i915, encoder->port); + bool is_tc = intel_phy_is_tc(i915, phy); struct drm_modeset_acquire_ctx ctx; enum intel_hotplug_state state; int ret; @@ -4563,8 +4566,15 @@ intel_ddi_hotplug(struct intel_encoder *encoder, * valid EDID. To solve this schedule another detection cycle if this * time around we didn't detect any change in the sink's connection * status. + * + * Type-c connectors which get their HPD signal deasserted then + * reasserted, without unplugging/replugging the sink from the + * connector, introduce a delay until the AUX channel communication + * becomes functional. Retry the detection for 5 seconds on type-c + * connectors to account for this delay. */ - if (state == INTEL_HOTPLUG_UNCHANGED && !connector->hotplug_retries && + if (state == INTEL_HOTPLUG_UNCHANGED && + connector->hotplug_retries < (is_tc ? 5 : 1) && !dig_port->dp.is_mst) state = INTEL_HOTPLUG_RETRY; |