From nobody Wed Dec 17 00:12:47 2025 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 14219C77B7C for ; Sun, 23 Apr 2023 12:13:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230110AbjDWMNK (ORCPT ); Sun, 23 Apr 2023 08:13:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229808AbjDWMNA (ORCPT ); Sun, 23 Apr 2023 08:13:00 -0400 Received: from mail-io1-xd30.google.com (mail-io1-xd30.google.com [IPv6:2607:f8b0:4864:20::d30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07A581733 for ; Sun, 23 Apr 2023 05:12:58 -0700 (PDT) Received: by mail-io1-xd30.google.com with SMTP id ca18e2360f4ac-763ae18986cso45292739f.3 for ; Sun, 23 Apr 2023 05:12:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1682251977; x=1684843977; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=h8jgcM/QeE+Y8+Tr1jy98fVl4Bmm9q0XNJC4VTJTM+4=; b=JLzNHOnxE/Vlwa1HzZoN9UvluDSoAkJFGjmilwdrZTHODn/B7WZdQo7WJVxGLOdN7P 41iUIe9L5ctu6NXqWhWF/1BN6smV+7uv+21u4sE/cuNMlSTkM/7HegdzxECGDsXkwpqf 3UZiJe9PYRE7ni885DRXTw9Y7+unExr9OxeBkQ3V8RiTgFTtRHKVLzfLsZLFWYUpOR4Y jz+GeF5+kA/+aBsfgbJLeN6tCtFltbkAsZAtSWChw2el75ZYa0P2JtRGNvw8bPlQtO4Y ZEwyr3AgNLNfZrvwn97aAw/SQs/eXhWhuI4J14L30r1VywENs6jB2cczfwXedgy5Pneh 11Ug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682251977; x=1684843977; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=h8jgcM/QeE+Y8+Tr1jy98fVl4Bmm9q0XNJC4VTJTM+4=; b=hFJ7Eo8AWdSE7DCmBj5YPSW3+tKzMMyro15ld4AGGK1iH9dfjnIwO38pr6jEK0euYH nfFL/+Bjz7PQkJf0733m6DTp+1gsBVqoXeQ1BetoXNOxwaWwrEKsLXBKBLDZHNe8Lipb UCJMaOeeACgw7DigNTXWUV74T9R+NF/kahH2A3C4sAwaT3SQ/t59byC21pyHWqaYO2mV IHIFmfds1Y+9A0KU+u5HYD+H5xeDpLAKE19O+0Y6JUZq4HjJPH1T/Zp+2Xhv5FPDJMGK iyJS6WGIgtbPxSwbIqIk+ozDpBYNHL0k5uzZ7wHbxkt2c2/qDmw++cWE7nN5moX6g+S9 P3XQ== X-Gm-Message-State: AAQBX9dGuHzlGHcZT73tOvZE+kjLHuu6rdHpT6ctg1/xhsbbee4c+LT4 0tq7+MLQ5FFWJp+fEUh1/2k= X-Google-Smtp-Source: AKy350ajJ9p8UuNCdHf/nb41YNZSCy7QL46641e67mbV4AIeXZePMPVquMYo6Rj4SZM0+ArxtubmcQ== X-Received: by 2002:a92:cd4f:0:b0:329:bba2:781e with SMTP id v15-20020a92cd4f000000b00329bba2781emr3531026ilq.17.1682251977351; Sun, 23 Apr 2023 05:12:57 -0700 (PDT) Received: from aford-B741.lan ([2601:447:d001:897f:b473:5d7c:4c2:75d7]) by smtp.gmail.com with ESMTPSA id u11-20020a02230b000000b00411a1373aa5sm1612155jau.155.2023.04.23.05.12.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 23 Apr 2023 05:12:56 -0700 (PDT) From: Adam Ford To: dri-devel@lists.freedesktop.org Cc: m.szyprowski@samsung.com, aford@beaconembedded.com, dario.binacchi@amarulasolutions.com, l.stach@pengutronix.de, Adam Ford , Inki Dae , Jagan Teki , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter , Marek Vasut , linux-kernel@vger.kernel.org Subject: [PATCH V2 3/6] drm: bridge: samsung-dsim: Fetch pll-clock-frequency automatically Date: Sun, 23 Apr 2023 07:12:29 -0500 Message-Id: <20230423121232.1345909-4-aford173@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230423121232.1345909-1-aford173@gmail.com> References: <20230423121232.1345909-1-aford173@gmail.com> 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" Make the pll-clock-frequency optional. If it's present, use it to maintain backwards compatibility with existing hardware. If it is absent, read clock rate of "sclk_mipi" to determine the rate. Signed-off-by: Adam Ford --- drivers/gpu/drm/bridge/samsung-dsim.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge= /samsung-dsim.c index adb9c13c5f7f..5b6e7825b92f 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -1726,12 +1726,20 @@ static int samsung_dsim_parse_dt(struct samsung_dsi= m *dsi) { struct device *dev =3D dsi->dev; struct device_node *node =3D dev->of_node; + struct clk *pll_clk; int ret; =20 ret =3D samsung_dsim_of_read_u32(node, "samsung,pll-clock-frequency", &dsi->pll_clk_rate); - if (ret < 0) - return ret; + + /* If it doesn't exist, read it from the clock instead of failing */ + if (ret < 0) { + pll_clk =3D devm_clk_get(dev, "sclk_mipi"); + if (!IS_ERR(pll_clk)) + dsi->pll_clk_rate =3D clk_get_rate(pll_clk); + else + return PTR_ERR(pll_clk); + } =20 ret =3D samsung_dsim_of_read_u32(node, "samsung,burst-clock-frequency", &dsi->burst_clk_rate); --=20 2.39.2