On 02/16/2016 09:17 PM, Jyri Sarha wrote:
> On 01/22/16 19:48, Arnaud Pouliquen wrote:
>> Add IEC958 channel status helper that creates control to handle the
>> IEC60958 status bits.
>>
>> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>
>> ---
>> include/sound/pcm_iec958.h | 16 ++++++++
>> sound/core/pcm_iec958.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++
>> 2 files changed, 115 insertions(+)
>>
>> diff --git a/include/sound/pcm_iec958.h b/include/sound/pcm_iec958.h
>> index 36f023a..7453ace 100644
>> --- a/include/sound/pcm_iec958.h
>> +++ b/include/sound/pcm_iec958.h
>> @@ -3,9 +3,25 @@
>>
>> #include <linux/types.h>
>>
>> +/*
>> + * IEC 60958 controls parameters
>> + * Describes channel status and associated callback
>> + */
>> +struct snd_pcm_iec958_params {
>> + /* call when control is updated by user */
>> + int (*ctrl_set)(void *pdata, u8 *status, u8 len);
>> +
>> + struct snd_aes_iec958 *iec;
>> + void *pdata; /* user private data to retrieve context */
>> + struct mutex *mutex; /* use to avoid race condition */
>> +};
>> +
>> int snd_pcm_create_iec958_consumer(struct snd_pcm_runtime *runtime, u8 *cs,
>> size_t len);
>>
>> int snd_pcm_create_iec958_consumer_hw_params(struct snd_pcm_hw_params *params,
>> u8 *cs, size_t len);
>> +
>> +int snd_pcm_create_iec958_ctl(struct snd_pcm *pcm,
>> + struct snd_pcm_iec958_params *params, int stream);
>> #endif
>> diff --git a/sound/core/pcm_iec958.c b/sound/core/pcm_iec958.c
>> index c9f8b66..8dd0415 100644
>> --- a/sound/core/pcm_iec958.c
>> +++ b/sound/core/pcm_iec958.c
>> @@ -7,11 +7,87 @@
>> */
>> #include <linux/export.h>
>> #include <linux/types.h>
>> +#include <linux/wait.h>
>> #include <sound/asoundef.h>
>> +#include <sound/control.h>
>> #include <sound/pcm.h>
>> #include <sound/pcm_params.h>
>> #include <sound/pcm_iec958.h>
>>
>> +int snd_pcm_iec958_info(struct snd_kcontrol *kcontrol,
>> + struct snd_ctl_elem_info *uinfo)
>> +{
>> + uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
>> + uinfo->count = 1;
>> + return 0;
>> +}
>> +
>> +static int snd_pcm_iec958_get(struct snd_kcontrol *kcontrol,
>> + struct snd_ctl_elem_value *uctl)
>> +{
>> + struct snd_pcm_iec958_params *params = snd_kcontrol_chip(kcontrol);
>> +
>> + if (params->mutex)
>> + mutex_unlock(params->mutex);
>
> This here should be mutex_lock().
oops... Seems that i need to enable some debug configs in my environment...
My apologize for this copy/past and thanks for the test!
Anyway i need to perform further tests before deliver as patches instead
of rfc.
But i prefer to wait a decision on the HDMI codec before finalizing it.
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