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authorNicolin Chen <Guangyu.Chen@freescale.com>2013-12-23 17:28:53 +0800
committerMark Brown <broonie@linaro.org>2013-12-31 16:32:37 +0000
commit14c3aa98397b3b4e67b042f388f4ad0f9b18250e (patch)
tree285b5bb04929f258839266e2384404ba7167a0b0 /sound/soc/fsl
parent6ce4eac1f600b34f2f7f58f9cd8f0503d79e42ae (diff)
ASoC: imx-spdif: Use snd-soc-dummy CODEC driver to link card
This is a quick fix for the below two issues when building spdif as modules. 1) If modprobing modules in order: (Step 1) snd-soc-fsl-spdif -> (Step 2) snd-soc-imx-spdif -> (Step 3) snd-soc-spdif-tx/rx, we will fail to create imx-spdif card and dai link unless we rmmod snd-soc-imx-spdif and modprobe it again due to the execution platform_driver_unregister() in probe() when meeting -EPROBE_DEFER at Step 2. 2) After "imx-spdif sound-spdif.17: dit-hifi <-> 2004000.spdif mapping ok", 'rmmod snd-soc-imx-spdif' would cause kernel dump with warning: WARNING: CPU: 0 PID: 1301 at /home/rmk/git/linux-rmk/fs/sysfs/dir.c:915 sysfs_hash_and_remove+0x84/0x90() sysfs: can not remove 'dapm_widget', no directory This should be caused by disordered resourse releasing of the whole link. And trying to unregister the card and then CODEC dev can't fix this issue. Thus this patch just provides a simple fix to these two bugs by using the snd-soc-dummy in the core instead of seperate snd-soc-spdif-tx/rx so that there's no need to handle the registering and unregistering of CODEC or CODEC dai any more. Signed-off-by: Nicolin Chen <Guangyu.Chen@freescale.com> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/fsl')
-rw-r--r--sound/soc/fsl/Kconfig1
-rw-r--r--sound/soc/fsl/imx-spdif.c84
2 files changed, 21 insertions, 64 deletions
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index b7ab71f2ccc1..8c10b8f80ace 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -197,7 +197,6 @@ config SND_SOC_IMX_SPDIF
tristate "SoC Audio support for i.MX boards with S/PDIF"
select SND_SOC_IMX_PCM_DMA
select SND_SOC_FSL_SPDIF
- select SND_SOC_SPDIF
select REGMAP_MMIO
help
SoC Audio support for i.MX boards with S/PDIF
diff --git a/sound/soc/fsl/imx-spdif.c b/sound/soc/fsl/imx-spdif.c
index 8499d5292f08..e656245d24c9 100644
--- a/sound/soc/fsl/imx-spdif.c
+++ b/sound/soc/fsl/imx-spdif.c
@@ -14,17 +14,15 @@
#include <sound/soc.h>
struct imx_spdif_data {
- struct snd_soc_dai_link dai[2];
+ struct snd_soc_dai_link dai;
struct snd_soc_card card;
- struct platform_device *txdev;
- struct platform_device *rxdev;
};
static int imx_spdif_audio_probe(struct platform_device *pdev)
{
struct device_node *spdif_np, *np = pdev->dev.of_node;
struct imx_spdif_data *data;
- int ret = 0, num_links = 0;
+ int ret = 0;
spdif_np = of_parse_phandle(np, "spdif-controller", 0);
if (!spdif_np) {
@@ -40,69 +38,42 @@ static int imx_spdif_audio_probe(struct platform_device *pdev)
goto end;
}
- if (of_property_read_bool(np, "spdif-out")) {
- data->dai[num_links].name = "S/PDIF TX";
- data->dai[num_links].stream_name = "S/PDIF PCM Playback";
- data->dai[num_links].codec_dai_name = "dit-hifi";
- data->dai[num_links].codec_name = "spdif-dit";
- data->dai[num_links].cpu_of_node = spdif_np;
- data->dai[num_links].platform_of_node = spdif_np;
- num_links++;
-
- data->txdev = platform_device_register_simple("spdif-dit", -1, NULL, 0);
- if (IS_ERR(data->txdev)) {
- ret = PTR_ERR(data->txdev);
- dev_err(&pdev->dev, "register dit failed: %d\n", ret);
- goto end;
- }
- }
+ data->dai.name = "S/PDIF PCM";
+ data->dai.stream_name = "S/PDIF PCM";
+ data->dai.codec_dai_name = "snd-soc-dummy-dai";
+ data->dai.codec_name = "snd-soc-dummy";
+ data->dai.cpu_of_node = spdif_np;
+ data->dai.platform_of_node = spdif_np;
+ data->dai.playback_only = true;
+ data->dai.capture_only = true;
- if (of_property_read_bool(np, "spdif-in")) {
- data->dai[num_links].name = "S/PDIF RX";
- data->dai[num_links].stream_name = "S/PDIF PCM Capture";
- data->dai[num_links].codec_dai_name = "dir-hifi";
- data->dai[num_links].codec_name = "spdif-dir";
- data->dai[num_links].cpu_of_node = spdif_np;
- data->dai[num_links].platform_of_node = spdif_np;
- num_links++;
-
- data->rxdev = platform_device_register_simple("spdif-dir", -1, NULL, 0);
- if (IS_ERR(data->rxdev)) {
- ret = PTR_ERR(data->rxdev);
- dev_err(&pdev->dev, "register dir failed: %d\n", ret);
- goto error_dit;
- }
- }
+ if (of_property_read_bool(np, "spdif-out"))
+ data->dai.capture_only = false;
+
+ if (of_property_read_bool(np, "spdif-in"))
+ data->dai.playback_only = false;
- if (!num_links) {
+ if (data->dai.playback_only && data->dai.capture_only) {
dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n");
- goto error_dir;
+ goto end;
}
data->card.dev = &pdev->dev;
- data->card.num_links = num_links;
- data->card.dai_link = data->dai;
+ data->card.dai_link = &data->dai;
+ data->card.num_links = 1;
ret = snd_soc_of_parse_card_name(&data->card, "model");
if (ret)
- goto error_dir;
+ goto end;
ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret);
- goto error_dir;
+ goto end;
}
platform_set_drvdata(pdev, data);
- goto end;
-
-error_dir:
- if (data->rxdev)
- platform_device_unregister(data->rxdev);
-error_dit:
- if (data->txdev)
- platform_device_unregister(data->txdev);
end:
if (spdif_np)
of_node_put(spdif_np);
@@ -110,18 +81,6 @@ end:
return ret;
}
-static int imx_spdif_audio_remove(struct platform_device *pdev)
-{
- struct imx_spdif_data *data = platform_get_drvdata(pdev);
-
- if (data->rxdev)
- platform_device_unregister(data->rxdev);
- if (data->txdev)
- platform_device_unregister(data->txdev);
-
- return 0;
-}
-
static const struct of_device_id imx_spdif_dt_ids[] = {
{ .compatible = "fsl,imx-audio-spdif", },
{ /* sentinel */ }
@@ -135,7 +94,6 @@ static struct platform_driver imx_spdif_driver = {
.of_match_table = imx_spdif_dt_ids,
},
.probe = imx_spdif_audio_probe,
- .remove = imx_spdif_audio_remove,
};
module_platform_driver(imx_spdif_driver);