diff mbox

[v2,7/7] ASoC: samsung: Add HDMI audio support for Chromebook Snow

Message ID 20180309174858.24017-7-s.nawrocki@samsung.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

This patch updates the driver so, in addition to current DT bindings,
the new DT bindings with cpu, codec subnodes can be used, in order to
support sound on the HDMI interface.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
Changes since v1:
 - adjustments to changed order of codecs in codec/cpu-dai property,
 - fixed errors in snow_remove().
---
 sound/soc/samsung/snow.c | 226 +++++++++++++++++++++++++++++++++++++----------
 1 file changed, 178 insertions(+), 48 deletions(-)

--
2.14.2

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Comments

Krzysztof Kozlowski March 12, 2018, 7:39 a.m. UTC | #1
On Fri, Mar 9, 2018 at 6:48 PM, Sylwester Nawrocki
<s.nawrocki@samsung.com> wrote:
> This patch updates the driver so, in addition to current DT bindings,
> the new DT bindings with cpu, codec subnodes can be used, in order to
> support sound on the HDMI interface.
>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
> ---
> Changes since v1:
>  - adjustments to changed order of codecs in codec/cpu-dai property,
>  - fixed errors in snow_remove().
> ---
>  sound/soc/samsung/snow.c | 226 +++++++++++++++++++++++++++++++++++++----------
>  1 file changed, 178 insertions(+), 48 deletions(-)
>
> diff --git a/sound/soc/samsung/snow.c b/sound/soc/samsung/snow.c
> index fc62110f500f..f00ca1ca0171 100644
> --- a/sound/soc/samsung/snow.c
> +++ b/sound/soc/samsung/snow.c
> @@ -11,92 +11,207 @@
>   * General Public License for more details.
>   */
>
> +#include <linux/clk.h>
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
>  #include <linux/of.h>
>  #include <linux/of_device.h>
> -
> +#include <sound/pcm_params.h>
>  #include <sound/soc.h>
>
>  #include "i2s.h"
>
> -#define FIN_PLL_RATE           24000000
> +#define FIN_PLL_RATE           24000000UL

This change looks unrelated so how about making it separate patch?

For the rest:
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof
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On 03/12/2018 08:39 AM, Krzysztof Kozlowski wrote:
>> -#define FIN_PLL_RATE           24000000
>> +#define FIN_PLL_RATE           24000000UL
>
> This change looks unrelated so how about making it separate patch?

I knew you will find this! ;P I don't want to be making this kind
of funny patches :), I can repost v3 in a few days with this bit removed.
Krzysztof Kozlowski March 12, 2018, 6:04 p.m. UTC | #3
On Mon, Mar 12, 2018 at 05:21:03PM +0100, Sylwester Nawrocki wrote:
> On 03/12/2018 08:39 AM, Krzysztof Kozlowski wrote:
> >> -#define FIN_PLL_RATE           24000000
> >> +#define FIN_PLL_RATE           24000000UL
> >
> > This change looks unrelated so how about making it separate patch?
> 
> I knew you will find this! ;P I don't want to be making this kind
> of funny patches :), I can repost v3 in a few days with this bit removed.

Ah, you know, after working with crappy code and crappy history, I find
very useful to have strict approach around changes.  This one might be
harmless... or you might be fixing some warning caught by your
compiler thus it looks like nice candidate for seaprate patch.

Best regards,
Krzysztof

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diff mbox

Patch

diff --git a/sound/soc/samsung/snow.c b/sound/soc/samsung/snow.c
index fc62110f500f..f00ca1ca0171 100644
--- a/sound/soc/samsung/snow.c
+++ b/sound/soc/samsung/snow.c
@@ -11,92 +11,207 @@ 
  * General Public License for more details.
  */

+#include <linux/clk.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-
+#include <sound/pcm_params.h>
 #include <sound/soc.h>

 #include "i2s.h"

-#define FIN_PLL_RATE		24000000
+#define FIN_PLL_RATE		24000000UL

-static struct snd_soc_dai_link snow_dai[] = {
-	{
-		.name = "Primary",
-		.stream_name = "Primary",
-		.codec_dai_name = "HiFi",
-		.dai_fmt = SND_SOC_DAIFMT_I2S |
-				SND_SOC_DAIFMT_NB_NF |
-				SND_SOC_DAIFMT_CBS_CFS,
-	},
+struct snow_priv {
+	struct snd_soc_dai_link dai_link;
+	struct clk *clk_i2s_bus;
+};
+
+static int snow_card_hw_params(struct snd_pcm_substream *substream,
+				      struct snd_pcm_hw_params *params)
+{
+	static const unsigned int pll_rate[] = {
+		73728000U, 67737602U, 49152000U, 45158401U, 32768001U
+	};
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snow_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+	int bfs, psr, rfs, bitwidth;
+	unsigned long int rclk;
+	long int freq = -EINVAL;
+	int ret, i;
+
+	bitwidth = snd_pcm_format_width(params_format(params));
+	if (bitwidth < 0) {
+		dev_err(rtd->card->dev, "Invalid bit-width: %d\n", bitwidth);
+		return bitwidth;
+	}
+
+	if (bitwidth != 16 && bitwidth != 24) {
+		dev_err(rtd->card->dev, "Unsupported bit-width: %d\n", bitwidth);
+		return -EINVAL;
+	}
+
+	bfs = 2 * bitwidth;
+
+	switch (params_rate(params)) {
+	case 16000:
+	case 22050:
+	case 24000:
+	case 32000:
+	case 44100:
+	case 48000:
+	case 88200:
+	case 96000:
+		rfs = 8 * bfs;
+		break;
+	case 64000:
+		rfs = 384;
+		break;
+	case 8000:
+	case 11025:
+	case 12000:
+		rfs = 16 * bfs;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	rclk = params_rate(params) * rfs;
+
+	for (psr = 8; psr > 0; psr /= 2) {
+		for (i = 0; i < ARRAY_SIZE(pll_rate); i++) {
+			if ((pll_rate[i] - rclk * psr) <= 2) {
+				freq = pll_rate[i];
+				break;
+			}
+		}
+	}
+	if (freq < 0) {
+		dev_err(rtd->card->dev, "Unsupported RCLK rate: %lu\n", rclk);
+		return -EINVAL;
+	}
+
+	ret = clk_set_rate(priv->clk_i2s_bus, freq);
+	if (ret < 0) {
+		dev_err(rtd->card->dev, "I2S bus clock rate set failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct snd_soc_ops snow_card_ops = {
+	.hw_params = snow_card_hw_params,
 };

 static int snow_late_probe(struct snd_soc_card *card)
 {
 	struct snd_soc_pcm_runtime *rtd;
 	struct snd_soc_dai *codec_dai;
-	struct snd_soc_dai *cpu_dai;
-	int ret;

 	rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
-	codec_dai = rtd->codec_dai;
-	cpu_dai = rtd->cpu_dai;
-
-	/* Set the MCLK rate for the codec */
-	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
-					FIN_PLL_RATE, SND_SOC_CLOCK_IN);
-	if (ret < 0)
-		return ret;

+	/* In the multi-codec case codec_dais 0 is MAX98095 and 1 is HDMI. */
+	if (rtd->num_codecs > 1)
+		codec_dai = rtd->codec_dais[0];
+	else
+		codec_dai = rtd->codec_dai;

-	return 0;
+	/* Set the MCLK rate for the codec */
+	return snd_soc_dai_set_sysclk(codec_dai, 0,
+				FIN_PLL_RATE, SND_SOC_CLOCK_IN);
 }

 static struct snd_soc_card snow_snd = {
 	.name = "Snow-I2S",
 	.owner = THIS_MODULE,
-	.dai_link = snow_dai,
-	.num_links = ARRAY_SIZE(snow_dai),
-
 	.late_probe = snow_late_probe,
 };

 static int snow_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct snd_soc_card *card = &snow_snd;
-	struct device_node *i2s_node, *codec_node;
-	int i, ret;
-
-	i2s_node = of_parse_phandle(pdev->dev.of_node,
-				    "samsung,i2s-controller", 0);
-	if (!i2s_node) {
-		dev_err(&pdev->dev,
-			"Property 'i2s-controller' missing or invalid\n");
-		return -EINVAL;
-	}
+	struct device_node *cpu, *codec;
+	struct snd_soc_dai_link *link;
+	struct snow_priv *priv;
+	int ret;

-	codec_node = of_parse_phandle(pdev->dev.of_node,
-				      "samsung,audio-codec", 0);
-	if (!codec_node) {
-		dev_err(&pdev->dev,
-			"Property 'audio-codec' missing or invalid\n");
-		return -EINVAL;
-	}
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	link = &priv->dai_link;
+
+	link->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+			SND_SOC_DAIFMT_CBS_CFS;
+
+	link->name = "Primary";
+	link->stream_name = link->name;
+
+	card->dai_link = link;
+	card->num_links = 1;
+	card->dev = dev;
+
+	/* Try new DT bindings with HDMI support first. */
+	cpu = of_get_child_by_name(dev->of_node, "cpu");
+
+	if (cpu) {
+		link->ops = &snow_card_ops;

-	for (i = 0; i < ARRAY_SIZE(snow_dai); i++) {
-		snow_dai[i].codec_of_node = codec_node;
-		snow_dai[i].cpu_of_node = i2s_node;
-		snow_dai[i].platform_of_node = i2s_node;
+		link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
+		of_node_put(cpu);
+
+		if (!link->cpu_of_node) {
+			dev_err(dev, "Failed parsing cpu/sound-dai property\n");
+			return -EINVAL;
+		}
+
+		codec = of_get_child_by_name(dev->of_node, "codec");
+		ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
+		of_node_put(codec);
+
+		if (ret < 0) {
+			of_node_put(link->cpu_of_node);
+			dev_err(dev, "Failed parsing codec node\n");
+			return ret;
+		}
+
+		priv->clk_i2s_bus = of_clk_get_by_name(link->cpu_of_node,
+						       "i2s_opclk0");
+		if (IS_ERR(priv->clk_i2s_bus)) {
+			snd_soc_of_put_dai_link_codecs(link);
+			of_node_put(link->cpu_of_node);
+			return PTR_ERR(priv->clk_i2s_bus);
+		}
+	} else {
+		link->codec_dai_name = "HiFi",
+
+		link->cpu_of_node = of_parse_phandle(dev->of_node,
+						"samsung,i2s-controller", 0);
+		if (!link->cpu_of_node) {
+			dev_err(dev, "i2s-controller property parse error\n");
+			return -EINVAL;
+		}
+
+		link->codec_of_node = of_parse_phandle(dev->of_node,
+						"samsung,audio-codec", 0);
+		if (!link->codec_of_node) {
+			of_node_put(link->cpu_of_node);
+			dev_err(dev, "audio-codec property parse error\n");
+			return -EINVAL;
+		}
 	}

-	card->dev = &pdev->dev;
+	link->platform_of_node = link->cpu_of_node;

 	/* Update card-name if provided through DT, else use default name */
 	snd_soc_of_parse_card_name(card, "samsung,model");

-	ret = devm_snd_soc_register_card(&pdev->dev, card);
+	snd_soc_card_set_drvdata(card, priv);
+
+	ret = devm_snd_soc_register_card(dev, card);
 	if (ret) {
 		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 		return ret;
@@ -105,6 +220,20 @@  static int snow_probe(struct platform_device *pdev)
 	return ret;
 }

+static int snow_remove(struct platform_device *pdev)
+{
+	struct snow_priv *priv = platform_get_drvdata(pdev);
+	struct snd_soc_dai_link *link = &priv->dai_link;
+
+	of_node_put(link->cpu_of_node);
+	of_node_put(link->codec_of_node);
+	snd_soc_of_put_dai_link_codecs(link);
+
+	clk_put(priv->clk_i2s_bus);
+
+	return 0;
+}
+
 static const struct of_device_id snow_of_match[] = {
 	{ .compatible = "google,snow-audio-max98090", },
 	{ .compatible = "google,snow-audio-max98091", },
@@ -120,6 +249,7 @@  static struct platform_driver snow_driver = {
 		.of_match_table = snow_of_match,
 	},
 	.probe = snow_probe,
+	.remove = snow_remove,
 };

 module_platform_driver(snow_driver);