From mboxrd@z Thu Jan 1 00:00:00 1970 From: Piotr Stankiewicz Subject: [PATCH v3 2/2] ASoC: dpcm: play nice with CODEC<->CODEC links Date: Wed, 29 Jun 2016 13:32:39 +0100 Message-ID: <1467203559-28979-2-git-send-email-piotrs@opensource.wolfsonmicro.com> References: <1467203559-28979-1-git-send-email-piotrs@opensource.wolfsonmicro.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mx0a-001ae601.pphosted.com (mx0a-001ae601.pphosted.com [67.231.149.25]) by alsa0.perex.cz (Postfix) with ESMTP id BD4592682BA for ; Wed, 29 Jun 2016 14:32:54 +0200 (CEST) In-Reply-To: <1467203559-28979-1-git-send-email-piotrs@opensource.wolfsonmicro.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: broonie@kernel.org Cc: Piotr Stankiewicz , alsa-devel@alsa-project.org, patches@opensource.wolfsonmicro.com, lgirdwood@gmail.com List-Id: alsa-devel@alsa-project.org Currently in situations where a normal CODEC to CODEC link follows a DPCM DAI, an error in the following form will be logged: ASoC: can't get [playback|capture] BE for ASoC: no BE found for This happens because all widgets in a path containing a DPCM DAI will be passed to dpcm_add_paths, which will try to interpret the CODEC<->CODEC as if it were a DPCM DAI, in turn causing the error. This patch aims to resolve the described issue by stopping the DPCM graph walk, initiated from dpcm_path_get, at the first widget associated with a DPCM BE. Signed-off-by: Piotr Stankiewicz --- sound/soc/soc-pcm.c | 42 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index c2b0aa8..60d702f 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1287,6 +1287,46 @@ static int widget_in_list(struct snd_soc_dapm_widget_list *list, return 0; } +static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, + enum snd_soc_dapm_direction dir) +{ + struct snd_soc_card *card = widget->dapm->card; + struct snd_soc_pcm_runtime *rtd; + int i; + + if (dir == SND_SOC_DAPM_DIR_OUT) { + list_for_each_entry(rtd, &card->rtd_list, list) { + if (!rtd->dai_link->no_pcm) + continue; + + if (rtd->cpu_dai->playback_widget == widget) + return true; + + for (i = 0; i < rtd->num_codecs; ++i) { + struct snd_soc_dai *dai = rtd->codec_dais[i]; + if (dai->playback_widget == widget) + return true; + } + } + } else { /* SND_SOC_DAPM_DIR_IN */ + list_for_each_entry(rtd, &card->rtd_list, list) { + if (!rtd->dai_link->no_pcm) + continue; + + if (rtd->cpu_dai->capture_widget == widget) + return true; + + for (i = 0; i < rtd->num_codecs; ++i) { + struct snd_soc_dai *dai = rtd->codec_dais[i]; + if (dai->capture_widget == widget) + return true; + } + } + } + + return false; +} + int dpcm_path_get(struct snd_soc_pcm_runtime *fe, int stream, struct snd_soc_dapm_widget_list **list) { @@ -1295,7 +1335,7 @@ int dpcm_path_get(struct snd_soc_pcm_runtime *fe, /* get number of valid DAI paths and their widgets */ paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, - NULL); + dpcm_end_walk_at_be); dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, stream ? "capture" : "playback"); -- 1.7.10.4