From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: Vinod Koul <vkoul@kernel.org>,
Bard Liao <yung-chuan.liao@linux.intel.com>
Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
tiwai@suse.de, broonie@kernel.org, gregkh@linuxfoundation.org,
jank@cadence.com, srinivas.kandagatla@linaro.org,
rander.wang@linux.intel.com, ranjani.sridharan@linux.intel.com,
hui.wang@canonical.com, sanyog.r.kale@intel.com,
mengdong.lin@intel.com, bard.liao@intel.com
Subject: Re: [PATCH 07/11] soundwire: intel: Only call sdw stream APIs for the first cpu_dai
Date: Wed, 26 Aug 2020 09:35:19 -0500 [thread overview]
Message-ID: <5a7b75e5-4d64-9927-df81-68164ef2662a@linux.intel.com> (raw)
In-Reply-To: <20200826094636.GB2639@vkoul-mobl>
>> - ret = sdw_prepare_stream(dma->stream);
>> + /*
>> + * All cpu dais belong to a stream. To ensure sdw_prepare_stream
>> + * is called once per stream, we should call it only when
>> + * dai = first_cpu_dai.
>> + */
>> + if (first_cpu_dai == dai)
>> + ret = sdw_prepare_stream(dma->stream);
>
> Hmmm why not use the one place which is unique in the card to call this,
> hint machine dais are only called once.
we are already calling directly sdw_startup_stream() and
sdw_shutdown_stream() from the machine driver.
We could call sdw_stream_enable() in the dailink .trigger as well, since
it only calls the stream API.
However for both .prepare() and .hw_free() there are a set of dai-level
configurations using static functions defined only in intel.c, and I
don't think we can move the code to the machine driver, or split the
prepare/hw_free in two (dailink and dai operations).
I am not against your idea, I am not sure if it can be done.
Would you be ok to merge this as a first step and let us work on an
optimization later (which would require ASoC/SoundWire synchronization)?
next prev parent reply other threads:[~2020-08-26 14:40 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-18 2:41 [PATCH 00/11] soundwire: intel: add multi-link support Bard Liao
2020-08-18 2:41 ` [PATCH 01/11] soundwire: intel: disable shim wake on suspend Bard Liao
2020-08-18 2:41 ` [PATCH 02/11] soundwire: intel: ignore software command retries Bard Liao
2020-08-18 2:41 ` [PATCH 03/11] soundwire: intel: add multi-link support Bard Liao
2020-08-18 2:41 ` [PATCH 04/11] soundwire: intel: add missing support for all clock stop modes Bard Liao
2020-08-18 2:41 ` [PATCH 05/11] soundwire: bus: update multi-link definition with hw sync details Bard Liao
2020-08-26 9:44 ` Vinod Koul
2020-08-26 14:09 ` Pierre-Louis Bossart
2020-08-28 7:27 ` Vinod Koul
2020-08-18 2:41 ` [PATCH 06/11] soundwire: intel: add multi-link hw_synchronization information Bard Liao
2020-08-18 2:41 ` [PATCH 07/11] soundwire: intel: Only call sdw stream APIs for the first cpu_dai Bard Liao
2020-08-26 9:46 ` Vinod Koul
2020-08-26 14:35 ` Pierre-Louis Bossart [this message]
2020-08-28 7:49 ` Vinod Koul
2020-08-28 1:47 ` Liao, Bard
2020-08-28 7:45 ` Vinod Koul
2020-08-28 15:07 ` Pierre-Louis Bossart
2020-08-18 2:41 ` [PATCH 08/11] soundwire: stream: enable hw_sync as needed by hardware Bard Liao
2020-08-18 2:41 ` [PATCH 09/11] soundwire: intel: add dynamic debug trace for clock-stop invalid configs Bard Liao
2020-08-26 9:48 ` Vinod Koul
2020-08-26 14:38 ` Pierre-Louis Bossart
2020-08-28 7:49 ` Vinod Koul
2020-08-28 14:54 ` Pierre-Louis Bossart
2020-08-29 11:00 ` Vinod Koul
2020-08-31 15:15 ` Pierre-Louis Bossart
2020-09-01 11:07 ` Vinod Koul
2020-09-01 13:31 ` Pierre-Louis Bossart
2020-08-18 2:41 ` [PATCH 10/11] soundwire: intel: pass link_mask information to each master Bard Liao
2020-08-18 2:41 ` [PATCH 11/11] soundwire: intel: don't manage link power individually Bard Liao
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