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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 8DEFEC433F5 for ; Thu, 20 Jan 2022 10:31:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0259B10E5AE; Thu, 20 Jan 2022 10:31:06 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4E83410E5ED for ; Thu, 20 Jan 2022 10:31:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1642674664; x=1674210664; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=ov8fjPJVa76xer2XckeTdIRyrQ/ixZRNDCTNlEoTnPI=; b=ZLPbModqTLuQGWfMDbSqJkSnzv44+342qNdc2oiyIiMaRcADMI4+wWSA J5XT038OpFxSnDyO0qm4p2r2NxealLVVIGoLS7B7jiirIL5Vs3fdY+q6w 6El36PAWPeFgBsTcKknL6TruT/4Pn9ma2l9qlAHrN153Dgsg/Ut3mg6ww 6HhNJ2Hs6aK1dV603b2n02aqQKwYvFHiovkzmczoeZ44ixqPBXuhCXkwT yYqOxO6a483fVOAlxeOFO/P1MRqpHTMQ9thwfOG4CFBdbBJhkyRja8KUn no2jW657wjixpNDHDSU+EyGy9RoAAhVUjFbKSweacsCWrBPKHIC3Hgkka w==; X-IronPort-AV: E=McAfee;i="6200,9189,10232"; a="308659385" X-IronPort-AV: E=Sophos;i="5.88,302,1635231600"; d="scan'208";a="308659385" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jan 2022 02:31:03 -0800 X-IronPort-AV: E=Sophos;i="5.88,302,1635231600"; d="scan'208";a="532714585" Received: from davidfsc-mobl3.ger.corp.intel.com (HELO localhost) ([10.252.52.140]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jan 2022 02:31:02 -0800 From: Jani Nikula To: Jani Nikula , intel-gfx@lists.freedesktop.org Date: Thu, 20 Jan 2022 12:30:43 +0200 Message-Id: <20220120103043.3054510-1-jani.nikula@intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Content-Transfer-Encoding: 8bit Subject: [Intel-gfx] [PATCH v2] drm/i915/mst: only ack the ESI we actually handled 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" Seems odd that we clear all event status indicators if we've only handled some. Only clear the ones we've handled. v2: ack DOWN_REP and UP_REQ only if they were set in esi (Ville) Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/display/intel_dp.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 0960e6e3be77..cb726cee9e1d 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -3625,13 +3625,17 @@ static void intel_dp_handle_test_request(struct intel_dp *intel_dp) } static void -intel_dp_mst_hpd_irq(struct intel_dp *intel_dp, u8 *esi, bool *handled) +intel_dp_mst_hpd_irq(struct intel_dp *intel_dp, u8 *esi, u8 *ack) { - drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, handled); + bool handled = false; + + drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, &handled); + if (handled) + ack[1] |= esi[1] & (DP_DOWN_REP_MSG_RDY | DP_UP_REQ_MSG_RDY); if (esi[1] & DP_CP_IRQ) { intel_hdcp_handle_cp_irq(intel_dp->attached_connector); - *handled = true; + ack[1] |= DP_CP_IRQ; } } @@ -3683,7 +3687,7 @@ intel_dp_check_mst_status(struct intel_dp *intel_dp) for (;;) { u8 esi[4] = {}; - bool handled; + u8 ack[4] = {}; if (!intel_dp_get_sink_irq_esi(intel_dp, esi)) { drm_dbg_kms(&i915->drm, @@ -3699,15 +3703,15 @@ intel_dp_check_mst_status(struct intel_dp *intel_dp) esi[3] & LINK_STATUS_CHANGED) { if (!intel_dp_mst_link_status(intel_dp)) link_ok = false; - handled = true; + ack[3] |= LINK_STATUS_CHANGED; } - intel_dp_mst_hpd_irq(intel_dp, esi, &handled); + intel_dp_mst_hpd_irq(intel_dp, esi, ack); - if (!handled) + if (!memchr_inv(ack, 0, sizeof(ack))) break; - if (!intel_dp_ack_sink_irq_esi(intel_dp, esi)) + if (!intel_dp_ack_sink_irq_esi(intel_dp, ack)) drm_dbg_kms(&i915->drm, "Failed to ack ESI\n"); } -- 2.30.2