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Message-Id: <1430414237-11126-1-git-send-email-srinivas.kandagatla@linaro.org>
Date: Thu, 30 Apr 2015 18:17:17 +0100
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: Patrick Lai <plai@...eaurora.org>, Mark Brown <broonie@...nel.org>
Cc: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Banajit Goswami <bgoswami@...eaurora.org>,
Kenneth Westfield <kwestfie@...eaurora.org>,
Liam Girdwood <lgirdwood@...il.com>,
Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
alsa-devel@...a-project.org, linux-arm-msm@...r.kernel.org,
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [RFC PATCH 06/14] ASoC: qcom: support bitclk and osrclk per i2s port
This patch adds support to allow bitclk and osrclk per i2s dai port.
on APQ8016 there are 4 i2s ports each one has its own bit clks.
Without this patch its not possible to support multiple i2s ports in the
lpass driver.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
sound/soc/qcom/lpass-cpu.c | 53 ++++++++++++++++++++++++++++++----------------
sound/soc/qcom/lpass.h | 5 +++--
2 files changed, 38 insertions(+), 20 deletions(-)
diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
index 7aca253..66d068b 100644
--- a/sound/soc/qcom/lpass-cpu.c
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -33,7 +33,7 @@ static int lpass_cpu_daiops_set_sysclk(struct snd_soc_dai *dai, int clk_id,
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
int ret;
- ret = clk_set_rate(drvdata->mi2s_osr_clk, freq);
+ ret = clk_set_rate(drvdata->mi2s_osr_clk[dai->id], freq);
if (ret)
dev_err(dai->dev, "%s() error setting mi2s osrclk to %u: %d\n",
__func__, freq, ret);
@@ -47,18 +47,18 @@ static int lpass_cpu_daiops_startup(struct snd_pcm_substream *substream,
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
int ret;
- ret = clk_prepare_enable(drvdata->mi2s_osr_clk);
+ ret = clk_prepare_enable(drvdata->mi2s_osr_clk[dai->id]);
if (ret) {
dev_err(dai->dev, "%s() error in enabling mi2s osr clk: %d\n",
__func__, ret);
return ret;
}
- ret = clk_prepare_enable(drvdata->mi2s_bit_clk);
+ ret = clk_prepare_enable(drvdata->mi2s_bit_clk[dai->id]);
if (ret) {
dev_err(dai->dev, "%s() error in enabling mi2s bit clk: %d\n",
__func__, ret);
- clk_disable_unprepare(drvdata->mi2s_osr_clk);
+ clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->id]);
return ret;
}
@@ -70,8 +70,8 @@ static void lpass_cpu_daiops_shutdown(struct snd_pcm_substream *substream,
{
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
- clk_disable_unprepare(drvdata->mi2s_bit_clk);
- clk_disable_unprepare(drvdata->mi2s_osr_clk);
+ clk_disable_unprepare(drvdata->mi2s_bit_clk[dai->id]);
+ clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->id]);
}
static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
@@ -146,7 +146,7 @@ static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
return ret;
}
- ret = clk_set_rate(drvdata->mi2s_bit_clk, rate * bitwidth * 2);
+ ret = clk_set_rate(drvdata->mi2s_bit_clk[dai->id], rate * bitwidth * 2);
if (ret) {
dev_err(dai->dev, "%s() error setting mi2s bitclk to %u: %d\n",
__func__, rate * bitwidth * 2, ret);
@@ -351,7 +351,8 @@ int lpass_cpu_platform_probe(struct platform_device *pdev)
struct lpass_variant *variant;
struct device *dev = &pdev->dev;
const struct of_device_id *match;
- int ret;
+ char clk_name[16];
+ int ret, i;
dsp_of_node = of_parse_phandle(pdev->dev.of_node, "qcom,adsp", 0);
if (dsp_of_node) {
@@ -397,18 +398,34 @@ int lpass_cpu_platform_probe(struct platform_device *pdev)
if (variant->init)
variant->init(pdev);
- drvdata->mi2s_osr_clk = devm_clk_get(&pdev->dev, "mi2s-osr-clk");
- if (IS_ERR(drvdata->mi2s_osr_clk)) {
- dev_err(&pdev->dev, "%s() error getting mi2s-osr-clk: %ld\n",
- __func__, PTR_ERR(drvdata->mi2s_osr_clk));
- return PTR_ERR(drvdata->mi2s_osr_clk);
+ for (i = 0; i < variant->num_dai; i++) {
+ if (variant->num_dai > 1)
+ sprintf(clk_name, "mi2s-osr-clk%d", i);
+ else
+ sprintf(clk_name, "mi2s-osr-clk");
+
+ drvdata->mi2s_osr_clk[i] = devm_clk_get(&pdev->dev, clk_name);
+ if (IS_ERR(drvdata->mi2s_osr_clk[i])) {
+ dev_err(&pdev->dev, "%s() error getting mi2s-osr-clk: %ld\n",
+ __func__, PTR_ERR(drvdata->mi2s_osr_clk[i]));
+ return PTR_ERR(drvdata->mi2s_osr_clk[i]);
+ }
}
- drvdata->mi2s_bit_clk = devm_clk_get(&pdev->dev, "mi2s-bit-clk");
- if (IS_ERR(drvdata->mi2s_bit_clk)) {
- dev_err(&pdev->dev, "%s() error getting mi2s-bit-clk: %ld\n",
- __func__, PTR_ERR(drvdata->mi2s_bit_clk));
- return PTR_ERR(drvdata->mi2s_bit_clk);
+ for (i = 0; i < variant->num_dai; i++) {
+
+ if (variant->num_dai > 1)
+ sprintf(clk_name, "mi2s-bit-clk%d", i);
+ else
+ sprintf(clk_name, "mi2s-bit-clk");
+
+ drvdata->mi2s_bit_clk[i] = devm_clk_get(&pdev->dev, clk_name);
+ if (IS_ERR(drvdata->mi2s_bit_clk[i])) {
+ dev_err(&pdev->dev,
+ "%s() error getting mi2s-bit-clk: %ld\n",
+ __func__, PTR_ERR(drvdata->mi2s_bit_clk[i]));
+ return PTR_ERR(drvdata->mi2s_bit_clk[i]);
+ }
}
drvdata->ahbix_clk = devm_clk_get(&pdev->dev, "ahbix-clk");
diff --git a/sound/soc/qcom/lpass.h b/sound/soc/qcom/lpass.h
index 80f4b1c..6ce2a51 100644
--- a/sound/soc/qcom/lpass.h
+++ b/sound/soc/qcom/lpass.h
@@ -22,6 +22,7 @@
#include <linux/regmap.h>
#define LPASS_AHBIX_CLOCK_FREQUENCY 131072000
+#define LPASS_MAX_MI2S_PORTS (4)
/* Both the CPU DAI and platform drivers will access this data */
struct lpass_data {
@@ -30,10 +31,10 @@ struct lpass_data {
struct clk *ahbix_clk;
/* MI2S system clock */
- struct clk *mi2s_osr_clk;
+ struct clk *mi2s_osr_clk[LPASS_MAX_MI2S_PORTS];
/* MI2S bit clock (derived from system clock by a divider */
- struct clk *mi2s_bit_clk;
+ struct clk *mi2s_bit_clk[LPASS_MAX_MI2S_PORTS];
/* low-power audio interface (LPAIF) registers */
void __iomem *lpaif;
--
1.9.1
--
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