From: Imre Deak imre.deak@intel.com
The DDI IO power well must not be enabled for a TypeC port in TBT mode, ensure this during driver loading/system resume.
This gets rid of error messages like [drm] *ERROR* power well DDI E TC2 IO state mismatch (refcount 1/enabled 0)
and avoids leaking the power ref when disabling the output.
Cc: stable@vger.kernel.org # v5.4+ 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/20200330152244.11316-1-imre.de... (cherry picked from commit f77a2db27f26c3ccba0681f7e89fef083718f07f) Signed-off-by: Rodrigo Vivi rodrigo.vivi@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/i915/display/intel_ddi.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 8eb2b3ec01edd..b3c77c988d1cd 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -2124,7 +2124,11 @@ static void intel_ddi_get_power_domains(struct intel_encoder *encoder, return;
dig_port = enc_to_dig_port(&encoder->base); - intel_display_power_get(dev_priv, dig_port->ddi_io_power_domain); + + if (!intel_phy_is_tc(dev_priv, phy) || + dig_port->tc_mode != TC_PORT_TBT_ALT) + intel_display_power_get(dev_priv, + dig_port->ddi_io_power_domain);
/* * AUX power is only needed for (e)DP mode, and for HDMI mode on TC