Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Olivier Moysan <olivier.moysan@st.com>
To:     <lgirdwood@gmail.com>, <broonie@kernel.org>, <perex@perex.cz>,
        <tiwai@suse.com>, <mcoquelin.stm32@gmail.com>,
        <alexandre.torgue@st.com>, <alsa-devel@alsa-project.org>,
        <robh@kernel.org>, <mark.rutland@arm.com>,
        <devicetree@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>, <kernel@stlinux.com>,
        <linux-kernel@vger.kernel.org>, <olivier.moysan@st.com>
CC:     <arnaud.pouliquen@st.com>, <benjamin.gaignard@st.com>
Subject: [PATCH 2/2] ASoC: add mclk-fs support to audio graph card
Date:   Thu, 9 Nov 2017 15:07:58 +0100
Message-ID: <1510236478-2351-3-git-send-email-olivier.moysan@st.com>
In-Reply-To: <1510236478-2351-1-git-send-email-olivier.moysan@st.com>
References: <1510236478-2351-1-git-send-email-olivier.moysan@st.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Add mclk-fs support to audio graph card
as it was previously implemented in simple card.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
---
 sound/soc/generic/audio-graph-card.c | 47 ++++++++++++++++++++++++++++++------
 1 file changed, 39 insertions(+), 8 deletions(-)

diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
index 488c52f..1b61642 100644
--- a/sound/soc/generic/audio-graph-card.c
+++ b/sound/soc/generic/audio-graph-card.c
@@ -29,7 +29,9 @@ struct graph_card_data {
 	struct graph_dai_props {
 		struct asoc_simple_dai cpu_dai;
 		struct asoc_simple_dai codec_dai;
+		unsigned int mclk_fs;
 	} *dai_props;
+	unsigned int mclk_fs;
 	struct snd_soc_dai_link *dai_link;
 	struct gpio_desc *pa_gpio;
 };
@@ -95,9 +97,43 @@ static void asoc_graph_card_shutdown(struct snd_pcm_substream *substream)
 	asoc_simple_card_clk_disable(&dai_props->codec_dai);
 }
 
+static int asoc_graph_card_hw_params(struct snd_pcm_substream *substream,
+				     struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
+	struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
+	unsigned int mclk, mclk_fs = 0;
+	int ret = 0;
+
+	if (priv->mclk_fs)
+		mclk_fs = priv->mclk_fs;
+	else if (dai_props->mclk_fs)
+		mclk_fs = dai_props->mclk_fs;
+
+	if (mclk_fs) {
+		mclk = params_rate(params) * mclk_fs;
+		ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
+					     SND_SOC_CLOCK_IN);
+		if (ret && ret != -ENOTSUPP)
+			goto err;
+
+		ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
+					     SND_SOC_CLOCK_OUT);
+		if (ret && ret != -ENOTSUPP)
+			goto err;
+	}
+	return 0;
+err:
+	return ret;
+}
+
 static const struct snd_soc_ops asoc_graph_card_ops = {
 	.startup = asoc_graph_card_startup,
 	.shutdown = asoc_graph_card_shutdown,
+	.hw_params = asoc_graph_card_hw_params,
 };
 
 static int asoc_graph_card_dai_init(struct snd_soc_pcm_runtime *rtd)
@@ -146,10 +182,7 @@ static int asoc_graph_card_dai_link_of(struct device_node *cpu_port,
 	if (ret < 0)
 		goto dai_link_of_err;
 
-	/*
-	 * we need to consider "mclk-fs" around here
-	 * see simple-card
-	 */
+	of_property_read_u32(rcpu_ep, "mclk-fs", &dai_props->mclk_fs);
 
 	ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link);
 	if (ret < 0)
@@ -217,10 +250,8 @@ static int asoc_graph_card_parse_of(struct graph_card_data *priv)
 	if (ret < 0)
 		return ret;
 
-	/*
-	 * we need to consider "mclk-fs" around here
-	 * see simple-card
-	 */
+	/* Factor to mclk, used in hw_params() */
+	of_property_read_u32(node, "mclk-fs", &priv->mclk_fs);
 
 	of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
 		ret = asoc_graph_card_dai_link_of(it.node, priv, idx++);
-- 
1.9.1


From 1583626259599329589@xxx Thu Nov 09 21:41:30 +0000 2017
X-GM-THRID: 1583193190987872787
X-Gmail-Labels: Inbox,Category Forums,HistoricalUnread