From patchwork Thu Sep 29 01:29:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Yen X-Patchwork-Id: 12993345 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 8362EC04A95 for ; Thu, 29 Sep 2022 01:29:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 80D3710E892; Thu, 29 Sep 2022 01:29:26 +0000 (UTC) Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5053110E892 for ; Thu, 29 Sep 2022 01:29:22 +0000 (UTC) Received: by mail-pl1-x62c.google.com with SMTP id d11so13162502pll.8 for ; Wed, 28 Sep 2022 18:29:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=paradetech-corp-partner-google-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date; bh=SM4jqQ6Il3GWV92a+UhDIXmom3xi+6T+8WqpFvA2YOI=; b=BxwFbi7sJXlRrhgH0WVMvi9wNAqdJvg8wsDNaPA1Y2P8J7Odr3QtDlVrPzYeSs/Sb7 1SgoHrKtmewvv3/gCkL/k1lnuzNEgwIlxckRL/6YALlI758+YcuPXOtHDPVoupvBYhc2 o8lexPw9R3nHrQYXcgNdZWvqt1+bYPoXUESBJaAqQoaSoHquHNXmn1/MxhqyjpriQc4Z EC2KupWYG30Gq6mHk8aKxGuSqGuAjWTlJJlYQgIsIy/c6P/oCG5AEeot3ttBv0mApLKr XnsqIcn6FOoY11lCVT4KYgMj/o9WvGaAmMU7MzQWYPJbSwcCSXll4/ZW15hbmApdHD7p vUrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date; bh=SM4jqQ6Il3GWV92a+UhDIXmom3xi+6T+8WqpFvA2YOI=; b=bCwb59v1jmrM4kGGfIAS9s0iDeZLW/3BWNgMt4gpWyQFY5rGxnjQTEIQH3Hlyt4M2V I889mXqjL8jOOYR3kKDkT1yHzabKTUCcv7/SO+z6C6luWeIRIv3gq5Qs9G7T1mGdKWWN olWZqD1wgh9FqIT+QIWTPTvQc3uCseAgnutWQuQ7G7rOEBYo6KF7X+rN3S6n2/gbKsIx ugxpgnE6UkFVYMtFrj6zMlaul8KHRd53Gw8AHSVIivCmjyKj9K/FmapDrzYNKDT9tX0r xpj5wS+2fxVqzC8uuPUQB0uLaPWDbkK/3ga02m5SmFyTA6FnubEeYOJmI0IXyX7Y4MQN R41w== X-Gm-Message-State: ACrzQf03FZWuzem0W5cwrGKg6mR9daZ/1aM0EGIyitqLFHeMnEClGkox iOLeSytE8/J70ZkvMqVATh9gXA== X-Google-Smtp-Source: AMsMyM4/VlvMw8aYyDVMgL6aP4TCJ54nI5FUpLRLPgGUaN5WTsGzu1Zib90d70GDDRWiW7G0kbDSog== X-Received: by 2002:a17:902:b182:b0:178:8977:4013 with SMTP id s2-20020a170902b18200b0017889774013mr790987plr.27.1664414961796; Wed, 28 Sep 2022 18:29:21 -0700 (PDT) Received: from jason-ThinkPad-L15-Gen-2.. ([203.67.103.146]) by smtp.gmail.com with ESMTPSA id a15-20020aa78e8f000000b00540f3ac5fb8sm4750848pfr.69.2022.09.28.18.29.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Sep 2022 18:29:21 -0700 (PDT) From: Jason Yen To: LKML , Douglas Anderson , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org Subject: [PATCH] drm/bridge: ps8640: Add software to support aux defer Date: Thu, 29 Sep 2022 09:29:11 +0800 Message-Id: <20220929012911.2521786-1-jason.yen@paradetech.corp-partner.google.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jason Yen , treapking@google.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This chip can not handle aux defer if the host directly program its aux registers to access edid/dpcd. So we need let software to handle the aux defer situation. Signed-off-by: Jason Yen --- drivers/gpu/drm/bridge/parade-ps8640.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c index 31e88cb39f8a..967dec840b91 100644 --- a/drivers/gpu/drm/bridge/parade-ps8640.c +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -303,6 +303,14 @@ static ssize_t ps8640_aux_transfer_msg(struct drm_dp_aux *aux, case SWAUX_STATUS_ACKM: len = data & SWAUX_M_MASK; break; + case SWAUX_STATUS_DEFER: + case SWAUX_STATUS_I2C_DEFER: + if (is_native_aux) + msg->reply |= DP_AUX_NATIVE_REPLY_DEFER; + else + msg->reply |= DP_AUX_I2C_REPLY_DEFER; + len = data & SWAUX_M_MASK; + break; case SWAUX_STATUS_INVALID: return -EOPNOTSUPP; case SWAUX_STATUS_TIMEOUT: