From patchwork Thu Mar 4 23:51:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 392788 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 CB47CC433DB for ; Thu, 4 Mar 2021 23:53:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B05765000 for ; Thu, 4 Mar 2021 23:53:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233406AbhCDXxM (ORCPT ); Thu, 4 Mar 2021 18:53:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233374AbhCDXxM (ORCPT ); Thu, 4 Mar 2021 18:53:12 -0500 Received: from mail-pg1-x52d.google.com (mail-pg1-x52d.google.com [IPv6:2607:f8b0:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4371DC061574 for ; Thu, 4 Mar 2021 15:53:12 -0800 (PST) Received: by mail-pg1-x52d.google.com with SMTP id a23so66911pga.8 for ; Thu, 04 Mar 2021 15:53:12 -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=Qnp/ZHTkSIkVYskvkrF513Ugb3dk9usGZrQyQUnFAEk=; b=Wgqw+87O9xoe5W14UsxraXU6NYwlrhsNsCGv+E1NklZkP4eYldm/NAWr8Ok9Xq3BER g8Y0zPvu/kMnEk1MY1x8XpDbNkzjleZeMkkwOlP1w9Rbj7/69N/r3SVOQC0Js0I6kCab CdiUXNPRZyk9gt0IpUp1JGWYqRVH1u09T5IjA= 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=Qnp/ZHTkSIkVYskvkrF513Ugb3dk9usGZrQyQUnFAEk=; b=FQbKipnmnKD36LKbeo46ifeS6hjZ2SAFTep4Rdcn99EYsmvMaTJfjlLdhgbRTTo39r jMn+uqS14VvSQWdFgq4430tW40hvfBUG4Hw3he3szc6qnvrLrrKsTe00GwMqDrUVYWYr WgmoHcUZGkAz9lUFMtQyWVcUM+0YVs8R82sVPxhl7LsUWQZU2cKzySC3Fm8UgoJ3zgML QgN8lA6gUhfKckRILO/BgGR949mvp3NMhWhMORwx3iNXlDiVn1Dm6yO0D8zylHU9GI/k X3XHOl+bbqnWGU3smSUXAyN2ttfV5eo3f/b4RFcvitdnksAaHPxBpYRpnuMhouligMSL nVlw== X-Gm-Message-State: AOAM530zGlyiBgBacPmEjg9um3T0Ln2bBZ4fArQohpdqi/vSFLm0QuiZ FQtbBllWyusQYOMeRWA1kN+Dew== X-Google-Smtp-Source: ABdhPJy4x/gHMFUZGwtp7tcOp3lrs2YSyiDqqo8LnNYjXNY5rgKoSevRVezwQxVGQyGEYR1olzYgTQ== X-Received: by 2002:aa7:9577:0:b029:1ee:ea22:5eeb with SMTP id x23-20020aa795770000b02901eeea225eebmr6177361pfq.33.1614901991316; Thu, 04 Mar 2021 15:53:11 -0800 (PST) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:c4da:3a70:94aa:f337]) by smtp.gmail.com with ESMTPSA id r4sm319449pjl.15.2021.03.04.15.53.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Mar 2021 15:53:10 -0800 (PST) From: Douglas Anderson To: Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Sam Ravnborg Cc: Stephen Boyd , linux-arm-msm@vger.kernel.org, robdclark@chromium.org, Douglas Anderson , Daniel Vetter , David Airlie , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/3] drm/bridge: ti-sn65dsi86: Simplify refclk handling Date: Thu, 4 Mar 2021 15:51:59 -0800 Message-Id: <20210304155144.1.Ic9c04f960190faad5290738b2a35d73661862735@changeid> X-Mailer: git-send-email 2.30.1.766.gb4fecdf3b7-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The clock framework makes it simple to deal with an optional clock. You can call clk_get_optional() and if the clock isn't specified it'll just return NULL without complaint. It's valid to pass NULL to enable/disable/prepare/unprepare. Let's make use of this to simplify things a tiny bit. NOTE: this makes things look a tad bit asymmetric now since we check for NULL before clk_prepare_enable() but not for clk_disable_unprepare(). This seemed OK to me. We already have to check for NULL in the enable case anyway so why not avoid the extra call? Signed-off-by: Douglas Anderson Reviewed-by: Robert Foss Reviewed-by: Robert Foss Reviewed-by: Bjorn Andersson Reviewed-by: Stephen Boyd --- drivers/gpu/drm/bridge/ti-sn65dsi86.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index f27306c51e4d..942019842ff4 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -1261,14 +1261,9 @@ static int ti_sn_bridge_probe(struct i2c_client *client, return ret; } - pdata->refclk = devm_clk_get(pdata->dev, "refclk"); - if (IS_ERR(pdata->refclk)) { - ret = PTR_ERR(pdata->refclk); - if (ret == -EPROBE_DEFER) - return ret; - DRM_DEBUG_KMS("refclk not found\n"); - pdata->refclk = NULL; - } + pdata->refclk = devm_clk_get_optional(pdata->dev, "refclk"); + if (IS_ERR(pdata->refclk)) + return PTR_ERR(pdata->refclk); ret = ti_sn_bridge_parse_dsi_host(pdata); if (ret)