From: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
To: "Péter Ujfalusi" <peter.ujfalusi@linux.intel.com>,
"Vinod Koul" <vkoul@kernel.org>
Cc: Mark Brown <broonie@kernel.org>,
perex@perex.cz, tiwai@suse.com, lgirdwood@gmail.com,
srinivas.kandagatla@oss.qualcomm.com,
linux-sound@vger.kernel.org, kai.vehmanen@linux.intel.com,
yung-chuan.liao@linux.intel.com, daniel.baluta@nxp.com,
Vijendar.Mukunda@amd.com
Subject: Re: [PATCH 04/23] ASoC: soc-compress: Implement trigger FE-BE sequencing as with normal PCMs
Date: Tue, 8 Sep 2026 14:06:26 +0200 [thread overview]
Message-ID: <d7dccf9b-1729-4679-b20c-29fe4988d4c6@linux.dev> (raw)
In-Reply-To: <003c3998-5b46-4532-9d48-dd47b98d544e@linux.intel.com>
> gapless looks to be straight forward fort he first look. What made me
> delay the implementation was the fact that I could not find any way in
> firmware to support the metadata as one - OK, I can just ignore it.
> second: in kernel and in firmware I could not figure out _where_
> actually is the end of the current file in the buffer. In kernel we have
> circular buffer for the DMA and userspace just fills it and since for
> the kernel it is just data, it looks continuous.
I don't think the kernel needs to worry about anything. When the next
track is handled, the data is just added after the current write pointer.
IIRC all the accounting needs to be done at the firmware level, where
you have to reconstruct where the next track starts based on the number
of bytes transferred.
next prev parent reply other threads:[~2026-09-08 12:28 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-04 7:31 [PATCH 00/23] ALSA compress / ASoC compress / SOF: Compressed audio support with IPC4 Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 01/23] ALSA: compress: pin card module while stream is open Peter Ujfalusi
2026-09-04 7:50 ` Takashi Iwai
2026-09-04 8:03 ` Péter Ujfalusi
2026-09-04 7:31 ` [PATCH 02/23] ALSA: compress: stop active streams on disconnect Peter Ujfalusi
2026-09-04 7:51 ` Takashi Iwai
2026-09-04 7:31 ` [PATCH 03/23] ASoC: soc-compress: Provide a runtime for the compressed FE substream Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 04/23] ASoC: soc-compress: Implement trigger FE-BE sequencing as with normal PCMs Peter Ujfalusi
2026-09-04 19:45 ` Mark Brown
2026-09-07 5:25 ` Péter Ujfalusi
2026-09-07 11:26 ` Pierre-Louis Bossart
2026-09-07 14:03 ` Péter Ujfalusi
2026-09-07 16:53 ` Vinod Koul
2026-09-07 19:55 ` Pierre-Louis Bossart
2026-09-08 6:37 ` Péter Ujfalusi
2026-09-08 6:58 ` Vinod Koul
2026-09-08 8:41 ` Péter Ujfalusi
2026-09-08 12:06 ` Pierre-Louis Bossart [this message]
2026-09-08 14:04 ` Péter Ujfalusi
2026-09-08 12:37 ` Vinod Koul
2026-09-08 14:13 ` Péter Ujfalusi
2026-09-08 14:54 ` Pierre-Louis Bossart
2026-09-09 13:53 ` Péter Ujfalusi
2026-09-09 20:22 ` Pierre-Louis Bossart
2026-09-08 17:12 ` Vinod Koul
2026-09-09 14:09 ` Péter Ujfalusi
2026-09-08 6:52 ` Vinod Koul
2026-09-04 7:31 ` [PATCH 05/23] ASoC: soc-compress: Stop running dpcm on free Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 06/23] ASoC: SOF: compress: Rename compress ops with ipc3 prefix Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 07/23] ASoC: SOF: ipc4-pcm: harden pipeline teardown races Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 08/23] ASoC: SOF: sof-audio: do not dereference swidget->spipe unconditionally on free Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 09/23] ASoC: SOF: sof-audio: Expose a couple of functions Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 10/23] ASoC: SOF: pcm: Modify the signature of a couple of PCM IPC ops Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 11/23] ASoC: SOF: intel: hda-stream: Clear the current position when releasing stream Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 12/23] ASoC: SOF: ops: Add new platform-specific ops for compress Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 13/23] ASoC: SOF: ipc4: Add definition of module data in init_ext object type Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 14/23] ASoC: SOF: ipc4-topology: Support init_ext_module_data for process modules Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 15/23] ASoC: SOF: ipc4-pcm: Make the timestamp info usable outside of ipc4-pcm.c Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 16/23] ASoC: SOF: ipc4/ipc4-loader: Add SOF_INFO and CODEC_INFO to fw_config_params Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 17/23] ASoC: SOF: ipc4-pcm: Handle COMPR DRAIN triggers as EOS pipeline state Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 18/23] ASoC: SOF: ipc4-topology: Set FAST_MODE for host copier in compr mode Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 19/23] ASoC: SOF: Add support for IPC4 compressed Peter Ujfalusi
2026-09-04 20:08 ` Mark Brown
2026-09-07 5:15 ` Péter Ujfalusi
2026-09-09 6:48 ` Péter Ujfalusi
2026-09-04 7:31 ` [PATCH 20/23] ASoC: SOF: ipc4: Handle compressed drain done notification from firmware Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 21/23] ASoC: SOF: Intel: Kconfig: Remove redundant IPC version selects Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 22/23] ASoC: SOF: Intel: Kconfig: Select compress support for TGL+ platforms Peter Ujfalusi
2026-09-04 7:31 ` [PATCH 23/23] ASoC: SOF: topology: Add support for decoder and encoder widgets Peter Ujfalusi
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