From d544d000a3cbf845825508dafe0aebe7f93f0e04 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Thu, 4 Jan 2024 10:30:08 +0200 Subject: drm/i915/dp: Abort AUX on disconnected native DP ports MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit An AUX transfer on any disconnected DP port results in long timeout/retry delays the same way as this is described for TypeC port in commit a972cd3f0eb5 ("drm/i915/tc: Abort DP AUX transfer on a disconnected TC port") Prevent the delay on non-TypeC ports as well by aborting the transfer if the port is disconnected. For eDP keep the current behavior as the support for HPD signaling is optional for it. Link: https://patchwork.freedesktop.org/patch/msgid/20240104083008.2715733-13-imre.deak@intel.com Reviewed-by: Jouni Högander Signed-off-by: Imre Deak --- drivers/gpu/drm/i915/display/intel_dp_aux.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c index b36ef321e835..4f4a0e3b3114 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c @@ -231,8 +231,6 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); struct intel_encoder *encoder = &dig_port->base; struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); - enum phy phy = intel_port_to_phy(i915, dig_port->base.port); - bool is_tc_port = intel_phy_is_tc(i915, phy); i915_reg_t ch_ctl, ch_data[5]; u32 aux_clock_divider; enum intel_display_power_domain aux_domain; @@ -252,9 +250,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, * Abort transfers on a disconnected port as required by * DP 1.4a link CTS 4.2.1.5, also avoiding the long AUX * timeouts that would otherwise happen. - * TODO: abort the transfer on non-TC ports as well. */ - if (is_tc_port && + if (!intel_dp_is_edp(intel_dp) && !intel_digital_port_connected_locked(&dig_port->base)) { ret = -ENXIO; goto out_unlock; -- cgit v1.2.3