From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1542C433FE for ; Wed, 29 Sep 2021 13:29:00 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8A1D361353 for ; Wed, 29 Sep 2021 13:29:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 8A1D361353 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 25C396EA7C; Wed, 29 Sep 2021 13:28:59 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id D8DB06EA71 for ; Wed, 29 Sep 2021 13:28:41 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10122"; a="310487738" X-IronPort-AV: E=Sophos;i="5.85,332,1624345200"; d="scan'208";a="310487738" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Sep 2021 06:28:41 -0700 X-IronPort-AV: E=Sophos;i="5.85,332,1624345200"; d="scan'208";a="617510922" Received: from ideak-desk.fi.intel.com ([10.237.68.141]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Sep 2021 06:28:40 -0700 From: Imre Deak To: intel-gfx@lists.freedesktop.org Cc: =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= Date: Wed, 29 Sep 2021 16:28:31 +0300 Message-Id: <20210929132833.2253961-5-imre.deak@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210921002313.1132357-10-imre.deak@intel.com> References: <20210921002313.1132357-10-imre.deak@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Intel-gfx] [PATCH v2 09/13] drm/i915/tc: Avoid using legacy AUX PW in TBT mode X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" For the ADL-P TBT mode the spec doesn't require blocking TC-cold by using the legacy AUX power domain. To avoid the timeouts that this would cause during PHY disconnect/reconnect sequences (which will be more frequent after a follow-up change) use the TC_COLD_OFF power domain in TBT mode on all platforms. On TGL this power domain blocks TC-cold via a PUNIT command, while on other platforms the domain just takes a runtime PM reference. If the HPD live status indicates that the port mode needs to be reset - for instance after switching from TBT to a DP-alt sink - still take the AUX domain, since the IOM firmware handshake requires this. v2: Rebased on v2 of the previous patch. Cc: José Roberto de Souza Signed-off-by: Imre Deak Reviewed-by: José Roberto de Souza --- drivers/gpu/drm/i915/display/intel_tc.c | 55 ++++++++++++++++--------- 1 file changed, 36 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c index 69c917fce03e4..2df4d0beb6368 100644 --- a/drivers/gpu/drm/i915/display/intel_tc.c +++ b/drivers/gpu/drm/i915/display/intel_tc.c @@ -59,10 +59,10 @@ bool intel_tc_cold_requires_aux_pw(struct intel_digital_port *dig_port) static enum intel_display_power_domain tc_cold_get_power_domain(struct intel_digital_port *dig_port, enum tc_port_mode mode) { - if (intel_tc_cold_requires_aux_pw(dig_port)) - return intel_legacy_aux_to_power_domain(dig_port->aux_ch); - else + if (mode == TC_PORT_TBT_ALT || !intel_tc_cold_requires_aux_pw(dig_port)) return POWER_DOMAIN_TC_COLD_OFF; + + return intel_legacy_aux_to_power_domain(dig_port->aux_ch); } static intel_wakeref_t @@ -645,6 +645,36 @@ static void intel_tc_port_reset_mode(struct intel_digital_port *dig_port, tc_port_mode_name(dig_port->tc_mode)); } +static bool intel_tc_port_needs_reset(struct intel_digital_port *dig_port) +{ + return intel_tc_port_get_target_mode(dig_port) != dig_port->tc_mode; +} + +static void intel_tc_port_update_mode(struct intel_digital_port *dig_port, + int required_lanes, bool force_disconnect) +{ + enum intel_display_power_domain domain; + intel_wakeref_t wref; + bool needs_reset = force_disconnect; + + if (!needs_reset) { + /* Get power domain required to check the hotplug live status. */ + wref = tc_cold_block(dig_port, &domain); + needs_reset = intel_tc_port_needs_reset(dig_port); + tc_cold_unblock(dig_port, domain, wref); + } + + if (!needs_reset) + return; + + /* Get power domain required for resetting the mode. */ + wref = tc_cold_block_in_mode(dig_port, TC_PORT_DISCONNECTED, &domain); + + intel_tc_port_reset_mode(dig_port, required_lanes, force_disconnect); + + tc_cold_unblock(dig_port, domain, wref); +} + static void intel_tc_port_link_init_refcount(struct intel_digital_port *dig_port, int refcount) @@ -691,11 +721,6 @@ void intel_tc_port_sanitize(struct intel_digital_port *dig_port) mutex_unlock(&dig_port->tc_lock); } -static bool intel_tc_port_needs_reset(struct intel_digital_port *dig_port) -{ - return intel_tc_port_get_target_mode(dig_port) != dig_port->tc_mode; -} - /* * The type-C ports are different because even when they are connected, they may * not be available/usable by the graphics driver: see the comment on @@ -735,18 +760,10 @@ static void __intel_tc_port_lock(struct intel_digital_port *dig_port, mutex_lock(&dig_port->tc_lock); - if (!dig_port->tc_link_refcount) { - enum intel_display_power_domain domain; - intel_wakeref_t tc_cold_wref; - tc_cold_wref = tc_cold_block(dig_port, &domain); - - if (force_disconnect || intel_tc_port_needs_reset(dig_port)) - intel_tc_port_reset_mode(dig_port, required_lanes, - force_disconnect); - - tc_cold_unblock(dig_port, domain, tc_cold_wref); - } + if (!dig_port->tc_link_refcount) + intel_tc_port_update_mode(dig_port, required_lanes, + force_disconnect); drm_WARN_ON(&i915->drm, dig_port->tc_lock_wakeref); dig_port->tc_lock_wakeref = wakeref; -- 2.27.0