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 D5744C433F5 for ; Mon, 4 Oct 2021 18:40:44 +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 951966140D for ; Mon, 4 Oct 2021 18:40:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 951966140D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.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 357826EA90; Mon, 4 Oct 2021 18:40:44 +0000 (UTC) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5A2416EA92 for ; Mon, 4 Oct 2021 18:40:42 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10127"; a="224314528" X-IronPort-AV: E=Sophos;i="5.85,346,1624345200"; d="scan'208";a="224314528" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Oct 2021 10:05:53 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.85,346,1624345200"; d="scan'208";a="483218742" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.171]) by fmsmga007.fm.intel.com with SMTP; 04 Oct 2021 10:05:51 -0700 Received: by stinkbox (sSMTP sendmail emulation); Mon, 04 Oct 2021 20:05:50 +0300 From: Ville Syrjala To: intel-gfx@lists.freedesktop.org Date: Mon, 4 Oct 2021 20:05:35 +0300 Message-Id: <20211004170535.4173-6-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211004170535.4173-1-ville.syrjala@linux.intel.com> References: <20211004170535.4173-1-ville.syrjala@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Intel-gfx] [PATCH v2 5/5] drm/i915: Call intel_dp_dump_link_status() for CR failures 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" From: Ville Syrjälä I suppose intel_dp_dump_link_status() might be useful for diagnosing link training failures. Hoever we only call from the channel EQ phase currently. Let's call it from the CR phase as well. Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/i915/display/intel_dp_link_training.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c index 18f4b469766e..c92044710012 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -649,6 +649,7 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp, struct drm_i915_private *i915 = to_i915(encoder->base.dev); u8 old_link_status[DP_LINK_STATUS_SIZE] = {}; int voltage_tries, cr_tries, max_cr_tries; + u8 link_status[DP_LINK_STATUS_SIZE]; bool max_vswing_reached = false; char phy_name[10]; @@ -678,8 +679,6 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp, voltage_tries = 1; for (cr_tries = 0; cr_tries < max_cr_tries; ++cr_tries) { - u8 link_status[DP_LINK_STATUS_SIZE]; - intel_dp_link_training_clock_recovery_delay(intel_dp, dp_phy); if (drm_dp_dpcd_read_phy_link_status(&intel_dp->aux, dp_phy, @@ -697,6 +696,7 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp, } if (voltage_tries == 5) { + intel_dp_dump_link_status(intel_dp, dp_phy, link_status); drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s][%s] Same voltage tried 5 times\n", encoder->base.base.id, encoder->base.name, phy_name); @@ -704,6 +704,7 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp, } if (max_vswing_reached) { + intel_dp_dump_link_status(intel_dp, dp_phy, link_status); drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s][%s] Max Voltage Swing reached\n", encoder->base.base.id, encoder->base.name, phy_name); @@ -732,6 +733,7 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp, max_vswing_reached = true; } + intel_dp_dump_link_status(intel_dp, dp_phy, link_status); drm_err(&i915->drm, "[ENCODER:%d:%s][%s] Failed clock recovery %d times, giving up!\n", encoder->base.base.id, encoder->base.name, phy_name, max_cr_tries); -- 2.32.0