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 X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73694C2D0A3 for ; Fri, 30 Oct 2020 01:17:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 01AC120731 for ; Fri, 30 Oct 2020 01:17:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="LF0qBgSq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725926AbgJ3BRl (ORCPT ); Thu, 29 Oct 2020 21:17:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53196 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725379AbgJ3BRl (ORCPT ); Thu, 29 Oct 2020 21:17:41 -0400 Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 73692C0613CF for ; Thu, 29 Oct 2020 18:17:41 -0700 (PDT) Received: by mail-pg1-x544.google.com with SMTP id k9so2108059pgt.9 for ; Thu, 29 Oct 2020 18:17:41 -0700 (PDT) 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=FioZFECWhpMnOGSDAS2R3NaknMAa9nER8bJXAhJQBW4=; b=LF0qBgSqyOAdwoCw4HGwLBGbAKla795/60rA/xKxOw4+v4jZtTsZbsubQAe5zD4mu6 6PaMtQV4qnNkO65SeXt3bF/aAisUj+jlH7mapeduBruhKv5kLek9Mt9cBfT2wx3kwVpA PW5hoi2oiEaj39wDvLx6mW4gqiCwvE4Cbn6kM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=FioZFECWhpMnOGSDAS2R3NaknMAa9nER8bJXAhJQBW4=; b=EHDORJx9sExdt/ESdeOHpwiRwzubFwQD6Kii3wSwjsu+LfdDe+prq1IrMyftZud+73 Pt0aI9hbm7qGuBVRcEHtg3rK/7/rkTOS9lfcDi/llA1ka/iT2Cndesisu/5parCVzfsP Rs9sGho5tRb5k2jFFLF9fI/YnmUwVeTnwzWLsKvFwUjJVhBasdmORgMooOQX8gKaee7V x03+VDQM7LxPuyPInsXzhSkO9yHqHwX7AjybCDtwAOjBtIA36ns0ZBcymZfYU0njMquU JeTJcWj3hXjWcqQ+1baE82ikgx2lqBXSHDZJgnWLPBx4jrwUzFPdlSwXACrLHgYT93d6 pnkQ== X-Gm-Message-State: AOAM530niPSHVDLjFKWZqGMn9piMhA5xeBvo+RY5cJvRoY0yp8dqjKoZ lzrvFBUb1S7ZIk5I6yM4+MnDUQ== X-Google-Smtp-Source: ABdhPJwBHzI5I3chnI4NyFlttCDjWMUUT6FUuVSNqVWqoWbDON4rdwj8TYB7dKYjI+F1OUUtg5kXAg== X-Received: by 2002:a63:f14:: with SMTP id e20mr50078pgl.52.1604020660981; Thu, 29 Oct 2020 18:17:40 -0700 (PDT) Received: from smtp.gmail.com ([2620:15c:202:201:3e52:82ff:fe6c:83ab]) by smtp.gmail.com with ESMTPSA id z26sm4477854pfq.131.2020.10.29.18.17.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Oct 2020 18:17:40 -0700 (PDT) From: Stephen Boyd To: Andrzej Hajda , Neil Armstrong Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Douglas Anderson , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Sean Paul Subject: [PATCH v2 0/4] drm/bridge: ti-sn65dsi86: Support EDID reading Date: Thu, 29 Oct 2020 18:17:34 -0700 Message-Id: <20201030011738.2028313-1-swboyd@chromium.org> X-Mailer: git-send-email 2.29.1.341.ge80a0c044ae-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch series cleans up the DDC code a little bit so that it is more efficient time wise and supports grabbing the EDID of the eDP panel over the aux channel. I timed this on a board I have on my desk and it takes about 20ms to grab the EDID out of the panel and make sure it is valid. The first two patches seem less controversial so I stuck them at the beginning. The third patch does the EDID reading and caches it so we don't have to keep grabbing it over and over again. And finally the last patch updates the reply field so that short reads and nacks over the channel are reflected properly instead of treating them as some sort of error that can't be discerned. Stephen Boyd (4): drm/bridge: ti-sn65dsi86: Combine register accesses in ti_sn_aux_transfer() drm/bridge: ti-sn65dsi86: Make polling a busy loop drm/bridge: ti-sn65dsi86: Read EDID blob over DDC drm/bridge: ti-sn65dsi86: Update reply on aux failures drivers/gpu/drm/bridge/ti-sn65dsi86.c | 108 ++++++++++++++++++-------- 1 file changed, 75 insertions(+), 33 deletions(-) Cc: Douglas Anderson Cc: Laurent Pinchart Cc: Jonas Karlman Cc: Jernej Skrabec Cc: Sean Paul base-commit: 3650b228f83adda7e5ee532e2b90429c03f7b9ec -- Sent by a computer, using git, on the internet