From nobody Sun Jun 28 00:11:10 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80293C433EF for ; Thu, 17 Feb 2022 07:15:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236078AbiBQHQF (ORCPT ); Thu, 17 Feb 2022 02:16:05 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:59482 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229773AbiBQHQD (ORCPT ); Thu, 17 Feb 2022 02:16:03 -0500 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2DA1298AF6 for ; Wed, 16 Feb 2022 23:15:49 -0800 (PST) Received: by mail-pj1-x1029.google.com with SMTP id v4so4767186pjh.2 for ; Wed, 16 Feb 2022 23:15:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=ZAu6P2QjxVR4VUdAWpGZn10VmuVqrvEvsDKRB7LLSj8=; b=ArhKscJZcPm7XQ3BJ7/KN3FPzSOYv/PtM+QKvL00DYpeOEn9zcHQagtwvF82TAgWjn syM0c/Wjm0YF7G1i0gSI4U8s6bce8/e8PF2Nv+GIrNHPU7BKa8/JnwvJG+WabCpRWr2K 6X8oMi8zAl+wu8zEGF0QAMOsNUV1HeDdbJXho= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=ZAu6P2QjxVR4VUdAWpGZn10VmuVqrvEvsDKRB7LLSj8=; b=WYd3g55Qy45Hns+Gl0iuRGo8K/dQmz4YO94PLc1c612BIFSH5x/2tlYj0+7KzPcALP aYih3RjkFAveGz/gUJJZaSt27FDUfov6pEX947pRX/g1RtVYYpnd0IkcFe1XJ+gLMN31 qkv8chVF6k8mBckU/D9xae4aYWns6NNG84NeJZmgbpIDlveXdgIA7qc/AY+j5ZAgeClm eDTrsyssI8wKdS0sl4hz9tGfpcxtP25PWxel2KzdUBMeZndACazpg6ABQLreaqrEz8Y/ 9RUIJC4DPwMtANdb0YTwPL3GXlTmjaXuTLmv+11eG/E5an9kIiFWfXD8U8W0gPeSzLYb THUA== X-Gm-Message-State: AOAM531/hw/BhkhiKey+mWefdqxjb2fMmqfk9pfjKmlk6oYokVWn3PIp USeOKnnhWAtLkua2NxqbxaWTQA== X-Google-Smtp-Source: ABdhPJyij8njo8LHEu3kVSs14z7Mv7QPOJtWnoJ6OszqSof5dd5sEUcVpUbNA9FPDeGyiosL5DqPbA== X-Received: by 2002:a17:90a:470e:b0:1b9:c33f:cd49 with SMTP id h14-20020a17090a470e00b001b9c33fcd49mr5902879pjg.186.1645082149123; Wed, 16 Feb 2022 23:15:49 -0800 (PST) Received: from hsinyi-z840.tpe.corp.google.com ([2401:fa00:1:10:cdb:2c0b:b1f8:e426]) by smtp.gmail.com with ESMTPSA id g21sm5827578pfc.167.2022.02.16.23.15.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Feb 2022 23:15:48 -0800 (PST) From: Hsin-Yi Wang To: Xin Ji , Robert Foss Cc: Neil Armstrong , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Daniel Vetter , Andrzej Hajda Subject: [PATCH] drm/bridge: Clear the DP_AUX_I2C_MOT bit passed in aux command. Date: Thu, 17 Feb 2022 15:15:41 +0800 Message-Id: <20220217071541.1722057-1-hsinyi@chromium.org> X-Mailer: git-send-email 2.35.1.265.g69c8d7142f-goog MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" It's observed that if the previous transfer didn't end with a command without DP_AUX_I2C_MOT, the next trasnfer will miss the first byte. But if the command in previous transfer is requested with length 0, anx7625 can't process this command. To make the case simpler, request with commands without DP_AUX_I2C_MOT bit. Fixes: adca62ec370c ("drm/bridge: anx7625: Support reading edid through aux= channel") Signed-off-by: Hsin-Yi Wang --- drivers/gpu/drm/bridge/analogix/anx7625.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/br= idge/analogix/anx7625.c index 633618bafd75d3..050616c1162128 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -1703,7 +1703,7 @@ static ssize_t anx7625_aux_transfer(struct drm_dp_aux= *aux, ret =3D -EINVAL; } if (!ret) - ret =3D anx7625_aux_trans(ctx, msg->request, msg->address, + ret =3D anx7625_aux_trans(ctx, request, msg->address, msg->size, msg->buffer); pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); --=20 2.35.1.265.g69c8d7142f-goog