diff options
author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-04-27 18:16:32 +0100 |
---|---|---|
committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-04-27 22:33:11 +0100 |
commit | 848dd8beef44df18f2eb61e00981b0692adb801b (patch) | |
tree | c860d13902c98fab86390e7b29027c063ffc3af5 /sound | |
parent | 8842c72afe9f954d9462da577a25d4a32bfe0a2b (diff) |
ASoC: Add more natural support for no-DMA DAIs
Since we can now support multiple platforms allow machines to not specify
a platform in a DAI link. Since the rest of the code requires that we have
a struct device for all objects we do this by substituting in a dummy
device that we register automatically.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Diffstat (limited to 'sound')
-rw-r--r-- | sound/soc/soc-core.c | 16 | ||||
-rw-r--r-- | sound/soc/soc-utils.c | 55 |
2 files changed, 66 insertions, 5 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 9dc13113fa2..16be3e5cf9e 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -1299,6 +1299,7 @@ static int soc_bind_dai_link(struct snd_soc_card *card, int num) struct snd_soc_codec *codec; struct snd_soc_platform *platform; struct snd_soc_dai *codec_dai, *cpu_dai; + const char *platform_name; if (rtd->complete) return 1; @@ -1351,13 +1352,18 @@ find_codec: dai_link->codec_name); find_platform: - /* do we already have the CODEC DAI for this link ? */ - if (rtd->platform) { + /* do we need a platform? */ + if (rtd->platform) goto out; - } - /* no, then find CPU DAI from registered DAIs*/ + + /* if there's no platform we match on the empty platform */ + platform_name = dai_link->platform_name; + if (!platform_name) + platform_name = "snd-soc-dummy"; + + /* no, then find one from the set of registered platforms */ list_for_each_entry(platform, &platform_list, list) { - if (!strcmp(platform->name, dai_link->platform_name)) { + if (!strcmp(platform->name, platform_name)) { rtd->platform = platform; goto out; } diff --git a/sound/soc/soc-utils.c b/sound/soc/soc-utils.c index 3f45e6a439b..28657914088 100644 --- a/sound/soc/soc-utils.c +++ b/sound/soc/soc-utils.c @@ -13,6 +13,7 @@ * option) any later version. */ +#include <linux/platform_device.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> @@ -55,3 +56,57 @@ int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params) return ret; } EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk); + +static struct snd_soc_platform_driver dummy_platform; + +static __devinit int snd_soc_dummy_probe(struct platform_device *pdev) +{ + return snd_soc_register_platform(&pdev->dev, &dummy_platform); +} + +static __devexit int snd_soc_dummy_remove(struct platform_device *pdev) +{ + snd_soc_unregister_platform(&pdev->dev); + + return 0; +} + +static struct platform_driver soc_dummy_driver = { + .driver = { + .name = "snd-soc-dummy", + .owner = THIS_MODULE, + }, + .probe = snd_soc_dummy_probe, + .remove = __devexit_p(snd_soc_dummy_remove), +}; + +static struct platform_device *soc_dummy_dev; + +static int __init snd_soc_util_init(void) +{ + int ret; + + soc_dummy_dev = platform_device_alloc("snd-soc-dummy", -1); + if (!soc_dummy_dev) + return -ENOMEM; + + ret = platform_device_add(soc_dummy_dev); + if (ret != 0) { + platform_device_put(soc_dummy_dev); + return ret; + } + + ret = platform_driver_register(&soc_dummy_driver); + if (ret != 0) + platform_device_unregister(soc_dummy_dev); + + return ret; +} +module_init(snd_soc_util_init); + +static void __exit snd_soc_util_exit(void) +{ + platform_device_unregister(soc_dummy_dev); + platform_driver_unregister(&soc_dummy_driver); +} +module_exit(snd_soc_util_exit); |