From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756036AbaJXXsb (ORCPT ); Fri, 24 Oct 2014 19:48:31 -0400 Received: from mail-pd0-f173.google.com ([209.85.192.173]:50549 "EHLO mail-pd0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754541AbaJXXs0 (ORCPT ); Fri, 24 Oct 2014 19:48:26 -0400 From: Nicolin Chen To: broonie@kernel.org, b02247@freescale.com Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, alsa-devel@alsa-project.org, timur@tabi.org, Li.Xiubo@freescale.com, lgirdwood@gmail.com Subject: [PATCH 1/2] ASoC: fsl_esai: Use dynamic slot width as default Date: Fri, 24 Oct 2014 16:48:12 -0700 Message-Id: X-Mailer: git-send-email 1.9.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The driver previously used 32-bit fixed slot width as default. In result, ESAI might use 32-bit length to capture 16-bit width audio slot from CODEC side when ESAI is running as DAI slave. So this patch just removes the default slot_width so as to use dynamic slot width. If there comes a specific situation that needs a fixed width, the machine driver shall set slot_width via set_tdm_slot() so as to let the ESAI driver replace the dynamic width policy with the fixed value. Signed-off-by: Nicolin Chen --- sound/soc/fsl/fsl_esai.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c index a645e29..ca319d5 100644 --- a/sound/soc/fsl/fsl_esai.c +++ b/sound/soc/fsl/fsl_esai.c @@ -513,10 +513,15 @@ static int fsl_esai_hw_params(struct snd_pcm_substream *substream, u32 width = snd_pcm_format_width(params_format(params)); u32 channels = params_channels(params); u32 pins = DIV_ROUND_UP(channels, esai_priv->slots); + u32 slot_width = width; u32 bclk, mask, val; int ret; - bclk = params_rate(params) * esai_priv->slot_width * esai_priv->slots; + /* Override slot_width if being specifially set */ + if (esai_priv->slot_width) + slot_width = esai_priv->slot_width; + + bclk = params_rate(params) * slot_width * esai_priv->slots; ret = fsl_esai_set_bclk(dai, tx, bclk); if (ret) @@ -538,7 +543,7 @@ static int fsl_esai_hw_params(struct snd_pcm_substream *substream, regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx), mask, val); mask = ESAI_xCR_xSWS_MASK | (tx ? ESAI_xCR_PADC : 0); - val = ESAI_xCR_xSWS(esai_priv->slot_width, width) | (tx ? ESAI_xCR_PADC : 0); + val = ESAI_xCR_xSWS(slot_width, width) | (tx ? ESAI_xCR_PADC : 0); regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx), mask, val); @@ -780,9 +785,6 @@ static int fsl_esai_probe(struct platform_device *pdev) return ret; } - /* Set a default slot size */ - esai_priv->slot_width = 32; - /* Set a default slot number */ esai_priv->slots = 2; -- 1.9.1