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: Douglas Anderson X-Patchwork-Id: 12117135 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 F2DD7C433E0 for ; Thu, 4 Mar 2021 23:53:13 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id A0DF265005 for ; Thu, 4 Mar 2021 23:53:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A0DF265005 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0C59F6EA8F; Thu, 4 Mar 2021 23:53:13 +0000 (UTC) Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by gabe.freedesktop.org (Postfix) with ESMTPS id B19C66EA8F for ; Thu, 4 Mar 2021 23:53:11 +0000 (UTC) Received: by mail-pf1-x42b.google.com with SMTP id j12so538943pfj.12 for ; Thu, 04 Mar 2021 15:53:11 -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=Mf1klbi9rI6D4Jt8/xtM2xboOUhvLmBuywOaL27IULtYfBy/qpRfeZHqk2sbdqJbmz lmTk/flbeenk60VbvmrK36CILmZJlnmz/Iu6JTb9g6xiTIUrBf8OGdrG7hsovNSIXmGW sISPPA82NtSRptgSbzXlnEWuFZLzps8YhWn3XNsmOj2gxZMHWCb7gvHW0tkG19xkkSI2 SpzCnm4deDV3Qb0ufInKXiaR1g3Wdn+kJKELh0DXN2QdrnXqEwSRD7sUajacTl7OHIzr H0CEzGCQw1/7mrGol26goUuznBUieppnddoWWcv+kk3Hw96+2UWcBV1i9axhfgwlM5JV zeoA== X-Gm-Message-State: AOAM532qpjMobCzEXcdD9BgIuhXItnjUFFgklX0Bgi6GBqKwZ+JHDvHp wLAtN9joi67HhGF7rUrSl25QAQ== 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 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 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: robdclark@chromium.org, David Airlie , linux-arm-msm@vger.kernel.org, Douglas Anderson , dri-devel@lists.freedesktop.org, Stephen Boyd , linux-kernel@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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: Bjorn Andersson Reviewed-by: Stephen Boyd Reviewed-by: Laurent Pinchart --- 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)