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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 E9605C3A5A6 for ; Sun, 22 Sep 2019 18:52:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C322821479 for ; Sun, 22 Sep 2019 18:52:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569178328; bh=sr+EgblRId/7wU5yaG1fEFxsM+CbrijiUWe8BT4QB5M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=M4ZvgutS5JG1wny5HgJ9VNJzF2h82EW4oKrhel5KLDRAuEeoTDntQESjJM99FCiLb H4vjpuy7z2zwArNviSxYDdA6TRWMrrJj5f8ooihLB2KVtdLIkGUyjcnBGo6nu/aRE1 igausN17lAmh1D/uKx3ooyy3TjyQorcfZumcmDZ8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407151AbfIVSwI (ORCPT ); Sun, 22 Sep 2019 14:52:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:50532 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727631AbfIVSwE (ORCPT ); Sun, 22 Sep 2019 14:52:04 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5767021D56; Sun, 22 Sep 2019 18:52:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569178324; bh=sr+EgblRId/7wU5yaG1fEFxsM+CbrijiUWe8BT4QB5M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=c9zonsSciT/QtXztU5fqRumUySP0pbZ5zch9yVv/vRnNhDoEpPpHp320ISRdy0Lp2 db1xY1yXhXxwEdAv/FeJgfbah2EdxwjJPg4tt4C2DUZuB5pplxLmSp6iysCvQZdggw 5/QPrnh8F4T7YtNK90GbXJIDR+laIttfWIPdRG8w= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Maxime Ripard , Mark Brown , Sasha Levin Subject: [PATCH AUTOSEL 5.2 089/185] ASoC: sun4i-i2s: Don't use the oversample to calculate BCLK Date: Sun, 22 Sep 2019 14:47:47 -0400 Message-Id: <20190922184924.32534-89-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190922184924.32534-1-sashal@kernel.org> References: <20190922184924.32534-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Maxime Ripard [ Upstream commit 7df8f9a20196072162d9dc8fe99943f2d35f23d5 ] The BCLK divider should be calculated using the parameters that actually make the BCLK rate: the number of channels, the sampling rate and the sample width. We've been using the oversample_rate previously because in the former SoCs, the BCLK's parent is MCLK, which in turn is being used to generate the oversample rate, so we end up with something like this: oversample = mclk_rate / sampling_rate bclk_div = oversample / word_size / channels So, bclk_div = mclk_rate / sampling_rate / word_size / channels. And this is actually better, since the oversampling ratio only plays a role because the MCLK is its parent, not because of what BCLK is supposed to be. Furthermore, that assumption of MCLK being the parent has been broken on newer SoCs, so let's use the proper formula, and have the parent rate as an argument. Fixes: 7d2993811a1e ("ASoC: sun4i-i2s: Add support for H3") Fixes: 21faaea1343f ("ASoC: sun4i-i2s: Add support for A83T") Fixes: 66ecce332538 ("ASoC: sun4i-i2s: Add compatibility with A64 codec I2S") Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/c3595e3a9788c2ef2dcc30aa3c8c4953bb5cc249.1566242458.git-series.maxime.ripard@bootlin.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/sunxi/sun4i-i2s.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c index fd7c37596f21a..1d946a1927088 100644 --- a/sound/soc/sunxi/sun4i-i2s.c +++ b/sound/soc/sunxi/sun4i-i2s.c @@ -219,10 +219,11 @@ static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = { }; static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s, - unsigned int oversample_rate, + unsigned long parent_rate, + unsigned int sampling_rate, unsigned int word_size) { - int div = oversample_rate / word_size / 2; + int div = parent_rate / sampling_rate / word_size / 2; int i; for (i = 0; i < ARRAY_SIZE(sun4i_i2s_bclk_div); i++) { @@ -312,8 +313,8 @@ static int sun4i_i2s_set_clk_rate(struct snd_soc_dai *dai, return -EINVAL; } - bclk_div = sun4i_i2s_get_bclk_div(i2s, oversample_rate, - word_size); + bclk_div = sun4i_i2s_get_bclk_div(i2s, i2s->mclk_freq, + rate, word_size); if (bclk_div < 0) { dev_err(dai->dev, "Unsupported BCLK divider: %d\n", bclk_div); return -EINVAL; -- 2.20.1