From patchwork Tue May 2 01:07:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adam Ford X-Patchwork-Id: 13228410 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B1298C77B7C for ; Tue, 2 May 2023 01:08:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D836210E107; Tue, 2 May 2023 01:08:16 +0000 (UTC) Received: from mail-io1-xd34.google.com (mail-io1-xd34.google.com [IPv6:2607:f8b0:4864:20::d34]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4970910E0E3 for ; Tue, 2 May 2023 01:08:14 +0000 (UTC) Received: by mail-io1-xd34.google.com with SMTP id ca18e2360f4ac-76937f5f9c5so44394139f.1 for ; Mon, 01 May 2023 18:08:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1682989693; x=1685581693; 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=HhrMWjFte7goMFkthyl+3kO5kW7x7TcIvC2UAKwMf6E=; b=ID1JuvXXaLMCf95WTEkk2TJJKto2G0IwIyP5dukwdxsKvv6+k9wvTf0ZW/8rB6Iq9G Zr9cdfS0Zm+DAwfcYuSXj3csRRYTcq+dqgwfOOiWevPX6vSU8C8yq8DhL6Mn2SwZ5k5m 6Gx+4MXd56NJr9DFfDZ3Wm0SsfSgXsUDx1sNzDzfAcWZ/0G9P7CtwcwnBPAG2kUe/fV+ Q+t++OufgZxqNj1XmNls0xVCt/cYMiFq9CPQQv6tKwAnU1EdD4xWF+TPj+sSLixJZmH6 cYS+sGVy/YHVhOYzIx2a1YkrWkqPdWwquZmf0cUr4AGdwbap/KgrtTcXTnJ947vaX1Jy UZ3A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682989693; x=1685581693; 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=HhrMWjFte7goMFkthyl+3kO5kW7x7TcIvC2UAKwMf6E=; b=NIlP5AJwBZEa7lzB/p8PP6recD1sh4DvuA6UcInksr6FvZYx4sWDJTLY/QGlLHwYWk DiBBLh6YAdCkZr2Pkh3PTrbwreT5GFZpBwYPFDnoSxHBVBO5mgkOvFG5Jh3eg9S6A9bI xhIxN8ur8ysYnsStqkYsxNueVnbCrKIapk0JcraKd/kED2xRAGzRHq+63WVMiFpyngWU 5PICdZ3pz6z2cOOlf3Wd4rJqZVL0NSuy+eNOnR0EO+FU/uA3EgoX3nQh8J2aW8Zj6gwF AcSjUrBYniPIqOONWJX0y54at78y8PJEdgTvItrYU9Oa7Old23Mnq1/ZoTzojTFzVrhM 8Dvw== X-Gm-Message-State: AC+VfDz42V8tvgpgunYo7e57MJX49PThDvwcMUgvI7WFzUtsBnmdWwF7 9vmDJsBANMncN0Jp9hhArkgBRjW1zB0= X-Google-Smtp-Source: ACHHUZ6jgYXGX6mtJyfGHfUHNtSJtYe7P86rVbqtcMJ4m+zA6lQ0bmX9P7E+oHlh4NkdFCZqHx4ikA== X-Received: by 2002:a6b:f007:0:b0:766:41fa:e26c with SMTP id w7-20020a6bf007000000b0076641fae26cmr11441794ioc.10.1682989692703; Mon, 01 May 2023 18:08:12 -0700 (PDT) Received: from aford-B741.lan ([2601:447:d001:897f:8257:a536:d7fc:1919]) by smtp.gmail.com with ESMTPSA id f16-20020a056638329000b0040fb5d5429fsm4836329jav.131.2023.05.01.18.08.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 May 2023 18:08:12 -0700 (PDT) From: Adam Ford To: dri-devel@lists.freedesktop.org Subject: [PATCH V3 3/7] drm: bridge: samsung-dsim: Fetch pll-clock-frequency automatically Date: Mon, 1 May 2023 20:07:55 -0500 Message-Id: <20230502010759.17282-4-aford173@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230502010759.17282-1-aford173@gmail.com> References: <20230502010759.17282-1-aford173@gmail.com> 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: marex@denx.de, Neil Armstrong , Robert Foss , Jonas Karlman , aford@beaconembedded.com, Jernej Skrabec , linux-kernel@vger.kernel.org, Laurent Pinchart , Andrzej Hajda , Chen-Yu Tsai , Marek Szyprowski , Adam Ford , Jagan Teki Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 Tested-by: Chen-Yu Tsai Tested-by: Frieder Schrempf Reviewed-by: Frieder Schrempf --- 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 bf4b33d2de76..2dc02a9e37c0 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_dsim *dsi) { struct device *dev = dsi->dev; struct device_node *node = dev->of_node; + struct clk *pll_clk; int ret; ret = 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 = devm_clk_get(dev, "sclk_mipi"); + if (!IS_ERR(pll_clk)) + dsi->pll_clk_rate = clk_get_rate(pll_clk); + else + return PTR_ERR(pll_clk); + } ret = samsung_dsim_of_read_u32(node, "samsung,burst-clock-frequency", &dsi->burst_clk_rate);