From patchwork Thu Jun 25 08:35:12 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Charles Keepax X-Patchwork-Id: 6672661 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id C44F29F1C1 for ; Thu, 25 Jun 2015 08:50:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BA9D220527 for ; Thu, 25 Jun 2015 08:50:37 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id 5694F20520 for ; Thu, 25 Jun 2015 08:50:36 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 68C8B260560; Thu, 25 Jun 2015 10:50:35 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [IPv6:::1]) by alsa0.perex.cz (Postfix) with ESMTP id 5A6582604D8; Thu, 25 Jun 2015 10:49:54 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 36353260499; Thu, 25 Jun 2015 10:49:52 +0200 (CEST) Received: from opensource.wolfsonmicro.com (opensource.wolfsonmicro.com [80.75.67.52]) by alsa0.perex.cz (Postfix) with ESMTP id 113DD26047E for ; Thu, 25 Jun 2015 10:49:45 +0200 (CEST) Received: from localhost.localdomain (unknown [87.246.78.26]) by opensource.wolfsonmicro.com (Postfix) with ESMTPSA id 6350E3B40FF; Thu, 25 Jun 2015 09:49:44 +0100 (BST) From: Charles Keepax To: broonie@kernel.org Date: Thu, 25 Jun 2015 09:35:12 +0100 Message-Id: <1435221312-22977-2-git-send-email-ckeepax@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1435221312-22977-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> References: <1435221312-22977-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> Cc: alsa-devel@alsa-project.org, patches@opensource.wolfsonmicro.com, lgirdwood@gmail.com Subject: [alsa-devel] [PATCH 2/2] ASoC: arizona: Implement stability check for LHPF coefficients X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP Specifying unstable coefficients for the low/high pass filters can have a severe impact on the audio. This patchs adds a stability check on the coefficients written to the low/high pass filter block to prevent this. Signed-off-by: Charles Keepax --- sound/soc/codecs/arizona.c | 17 +++++++++++++++++ sound/soc/codecs/arizona.h | 9 +++++++++ sound/soc/codecs/wm5102.c | 8 ++++---- sound/soc/codecs/wm5110.c | 8 ++++---- sound/soc/codecs/wm8997.c | 8 ++++---- 5 files changed, 38 insertions(+), 12 deletions(-) diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c index 3996786..a88202d 100644 --- a/sound/soc/codecs/arizona.c +++ b/sound/soc/codecs/arizona.c @@ -2372,6 +2372,23 @@ out: } EXPORT_SYMBOL_GPL(arizona_eq_coeff_put); +int arizona_lhpf_coeff_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); + struct arizona *arizona = dev_get_drvdata(codec->dev->parent); + __be16 *data = (__be16 *)ucontrol->value.bytes.data; + s16 val = be16_to_cpu(*data); + + if (abs(val) >= 4096) { + dev_err(arizona->dev, "Rejecting unstable LHPF coefficients\n"); + return -EINVAL; + } + + return snd_soc_bytes_put(kcontrol, ucontrol); +} +EXPORT_SYMBOL_GPL(arizona_lhpf_coeff_put); + MODULE_DESCRIPTION("ASoC Wolfson Arizona class device support"); MODULE_AUTHOR("Mark Brown "); MODULE_LICENSE("GPL"); diff --git a/sound/soc/codecs/arizona.h b/sound/soc/codecs/arizona.h index ebe50cf..13598b0 100644 --- a/sound/soc/codecs/arizona.h +++ b/sound/soc/codecs/arizona.h @@ -201,6 +201,13 @@ extern int arizona_mixer_values[ARIZONA_NUM_MIXER_INPUTS]; ((unsigned long)&(struct soc_bytes) { .base = xbase, \ .num_regs = 20, .mask = ~ARIZONA_EQ1_B1_MODE }) } +#define ARIZONA_LHPF_CONTROL(xname, xbase) \ +{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \ + .info = snd_soc_bytes_info, .get = snd_soc_bytes_get, \ + .put = arizona_lhpf_coeff_put, .private_value = \ + ((unsigned long)&(struct soc_bytes) { .base = xbase, \ + .num_regs = 1 }) } + #define ARIZONA_RATE_ENUM_SIZE 4 extern const char *arizona_rate_text[ARIZONA_RATE_ENUM_SIZE]; extern const int arizona_rate_val[ARIZONA_RATE_ENUM_SIZE]; @@ -238,6 +245,8 @@ extern int arizona_hp_ev(struct snd_soc_dapm_widget *w, extern int arizona_eq_coeff_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol); +extern int arizona_lhpf_coeff_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol); extern int arizona_set_sysclk(struct snd_soc_codec *codec, int clk_id, int source, unsigned int freq, int dir); diff --git a/sound/soc/codecs/wm5102.c b/sound/soc/codecs/wm5102.c index 556bd98..6ddee99 100644 --- a/sound/soc/codecs/wm5102.c +++ b/sound/soc/codecs/wm5102.c @@ -847,10 +847,10 @@ ARIZONA_MIXER_CONTROLS("LHPF2", ARIZONA_HPLP2MIX_INPUT_1_SOURCE), ARIZONA_MIXER_CONTROLS("LHPF3", ARIZONA_HPLP3MIX_INPUT_1_SOURCE), ARIZONA_MIXER_CONTROLS("LHPF4", ARIZONA_HPLP4MIX_INPUT_1_SOURCE), -SND_SOC_BYTES("LHPF1 Coefficients", ARIZONA_HPLPF1_2, 1), -SND_SOC_BYTES("LHPF2 Coefficients", ARIZONA_HPLPF2_2, 1), -SND_SOC_BYTES("LHPF3 Coefficients", ARIZONA_HPLPF3_2, 1), -SND_SOC_BYTES("LHPF4 Coefficients", ARIZONA_HPLPF4_2, 1), +ARIZONA_LHPF_CONTROL("LHPF1 Coefficients", ARIZONA_HPLPF1_2), +ARIZONA_LHPF_CONTROL("LHPF2 Coefficients", ARIZONA_HPLPF2_2), +ARIZONA_LHPF_CONTROL("LHPF3 Coefficients", ARIZONA_HPLPF3_2), +ARIZONA_LHPF_CONTROL("LHPF4 Coefficients", ARIZONA_HPLPF4_2), ARIZONA_MIXER_CONTROLS("DSP1L", ARIZONA_DSP1LMIX_INPUT_1_SOURCE), ARIZONA_MIXER_CONTROLS("DSP1R", ARIZONA_DSP1RMIX_INPUT_1_SOURCE), diff --git a/sound/soc/codecs/wm5110.c b/sound/soc/codecs/wm5110.c index dfa4d4b..05aa5bc 100644 --- a/sound/soc/codecs/wm5110.c +++ b/sound/soc/codecs/wm5110.c @@ -310,10 +310,10 @@ ARIZONA_MIXER_CONTROLS("LHPF2", ARIZONA_HPLP2MIX_INPUT_1_SOURCE), ARIZONA_MIXER_CONTROLS("LHPF3", ARIZONA_HPLP3MIX_INPUT_1_SOURCE), ARIZONA_MIXER_CONTROLS("LHPF4", ARIZONA_HPLP4MIX_INPUT_1_SOURCE), -SND_SOC_BYTES("LHPF1 Coefficients", ARIZONA_HPLPF1_2, 1), -SND_SOC_BYTES("LHPF2 Coefficients", ARIZONA_HPLPF2_2, 1), -SND_SOC_BYTES("LHPF3 Coefficients", ARIZONA_HPLPF3_2, 1), -SND_SOC_BYTES("LHPF4 Coefficients", ARIZONA_HPLPF4_2, 1), +ARIZONA_LHPF_CONTROL("LHPF1 Coefficients", ARIZONA_HPLPF1_2), +ARIZONA_LHPF_CONTROL("LHPF2 Coefficients", ARIZONA_HPLPF2_2), +ARIZONA_LHPF_CONTROL("LHPF3 Coefficients", ARIZONA_HPLPF3_2), +ARIZONA_LHPF_CONTROL("LHPF4 Coefficients", ARIZONA_HPLPF4_2), SOC_ENUM("LHPF1 Mode", arizona_lhpf1_mode), SOC_ENUM("LHPF2 Mode", arizona_lhpf2_mode), diff --git a/sound/soc/codecs/wm8997.c b/sound/soc/codecs/wm8997.c index 53e0a46..b4dba3a 100644 --- a/sound/soc/codecs/wm8997.c +++ b/sound/soc/codecs/wm8997.c @@ -238,10 +238,10 @@ SOC_ENUM("LHPF2 Mode", arizona_lhpf2_mode), SOC_ENUM("LHPF3 Mode", arizona_lhpf3_mode), SOC_ENUM("LHPF4 Mode", arizona_lhpf4_mode), -SND_SOC_BYTES("LHPF1 Coefficients", ARIZONA_HPLPF1_2, 1), -SND_SOC_BYTES("LHPF2 Coefficients", ARIZONA_HPLPF2_2, 1), -SND_SOC_BYTES("LHPF3 Coefficients", ARIZONA_HPLPF3_2, 1), -SND_SOC_BYTES("LHPF4 Coefficients", ARIZONA_HPLPF4_2, 1), +ARIZONA_LHPF_CONTROL("LHPF1 Coefficients", ARIZONA_HPLPF1_2), +ARIZONA_LHPF_CONTROL("LHPF2 Coefficients", ARIZONA_HPLPF2_2), +ARIZONA_LHPF_CONTROL("LHPF3 Coefficients", ARIZONA_HPLPF3_2), +ARIZONA_LHPF_CONTROL("LHPF4 Coefficients", ARIZONA_HPLPF4_2), SOC_ENUM("ISRC1 FSL", arizona_isrc_fsl[0]), SOC_ENUM("ISRC2 FSL", arizona_isrc_fsl[1]),