[alsa-devel] [PATCH 1/2] ASoC: SOF: ipc: update sof_ipc_stream_params

[Keyon Jie]

On 2019/7/3 上午7:29, Ranjani Sridharan wrote:
> On Tue, 2019-07-02 at 20:11 +0800, Keyon Jie wrote:
>> From: Marcin Rajwa <marcin.rajwa at linux.intel.com>
>>
>> The host period bytes needs to be passed to firmware.
>> Currently this field is used as notification for host
>> about period copy completion. Therefore we need to split these
>> two informations.
> Keyon/Marcin,
> 
> Could you please add a bit more context in the commit message on the
> need to split these two fields ie.. what usecases need this?

Sure, previously I wrote the commit message like this:

ASoC: SOF: add flag for position update ipc

In some cases, FW might need use the host_period_bytes even no position
update ipc reqiured from driver, here add another flag for position update,
and preserve host_period_bytes for FW to use.

This might require corresponding FW change and ABI alignment.

Thanks,
~Keyon

> 
> Thanks,
> Ranjani
>>
>> Signed-off-by: Marcin Rajwa <marcin.rajwa at linux.intel.com>
>> Signed-off-by: Keyon Jie <yang.jie at linux.intel.com>
>> ---
>>   include/sound/sof/stream.h | 4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/include/sound/sof/stream.h b/include/sound/sof/stream.h
>> index 643f175cb479..44acfa62fa69 100644
>> --- a/include/sound/sof/stream.h
>> +++ b/include/sound/sof/stream.h
>> @@ -83,10 +83,10 @@ struct sof_ipc_stream_params {
>>   	uint16_t sample_valid_bytes;
>>   	uint16_t sample_container_bytes;
>>   
>> -	/* for notifying host period has completed - 0 means no period
>> IRQ */
>>   	uint32_t host_period_bytes;
>> +	uint16_t no_period_irq; /* 1 means period IRQ mode OFF */
>>   
>> -	uint32_t reserved[2];
>> +	uint16_t reserved[3];
>>   	uint16_t chmap[SOF_IPC_MAX_CHANNELS];	/**< channel map -
>> SOF_CHMAP_ */
>>   } __packed;
>>   
> 
>