The patch

ASoC: Intel: sst: Free streams on suspend, re-alloc on resume

has been applied to the asoc tree at

https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying to this mail.

Thanks, Mark

From bf642bf57398572327072d306e26e38aebd94fa7 Mon Sep 17 00:00:00 2001

From: Hans de Goede hdegoede@redhat.com Date: Sun, 18 Feb 2018 23:01:43 +0100 Subject: [PATCH] ASoC: Intel: sst: Free streams on suspend, re-alloc on resume

The Bay Trail SST-DSP firmware version looses track of all streams over a suspend/resume, failing any attempts to resume and/or free streams, with a SST_ERR_INVALID_STREAM_ID error.

This commit adds support for free-ing the streams on suspend and re-allocating them on resume, fixing suspend/resume issues on devices using this firmware version.

This new behavior gets triggered by a new flag in sst_platform_info which only gets set on Bay Trail platforms.

This has been tested on the following devices: -Asus T100TA, Bay Trail + ALC5642 codec -Ployer MOMO7W, Bay Trail CR + ALC5652 codec

Tested-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Mark Brown broonie@kernel.org --- arch/x86/include/asm/platform_sst_audio.h | 1 + sound/soc/intel/atom/sst/sst.c | 24 +++++++++++++++++++++++- sound/soc/intel/atom/sst/sst.h | 4 ++++ sound/soc/intel/atom/sst/sst_acpi.c | 3 ++- sound/soc/intel/atom/sst/sst_stream.c | 24 +++++++++++++++++++++++- 5 files changed, 53 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/platform_sst_audio.h b/arch/x86/include/asm/platform_sst_audio.h index 5973a2f3db3d..059823bb8af7 100644 --- a/arch/x86/include/asm/platform_sst_audio.h +++ b/arch/x86/include/asm/platform_sst_audio.h @@ -135,6 +135,7 @@ struct sst_platform_info { const struct sst_res_info *res_info; const struct sst_lib_dnld_info *lib_info; const char *platform; + bool streams_lost_on_suspend; }; int add_sst_platform_device(void); #endif diff --git a/sound/soc/intel/atom/sst/sst.c b/sound/soc/intel/atom/sst/sst.c index 8afdff457579..0962bc9adc62 100644 --- a/sound/soc/intel/atom/sst/sst.c +++ b/sound/soc/intel/atom/sst/sst.c @@ -449,6 +449,13 @@ static int intel_sst_suspend(struct device *dev) dev_err(dev, "stream %d is running, can't suspend, abort\n", i); return -EBUSY; } + + if (ctx->pdata->streams_lost_on_suspend) { + stream->resume_status = stream->status; + stream->resume_prev = stream->prev; + if (stream->status != STREAM_UN_INIT) + sst_free_stream(ctx, i); + } } synchronize_irq(ctx->irq_num); flush_workqueue(ctx->post_msg_wq); @@ -509,8 +516,8 @@ static int intel_sst_resume(struct device *dev) { struct intel_sst_drv *ctx = dev_get_drvdata(dev); struct sst_fw_save *fw_save = ctx->fw_save; - int ret = 0; struct sst_block *block; + int i, ret = 0;

if (!fw_save) return 0; @@ -550,6 +557,21 @@ static int intel_sst_resume(struct device *dev) sst_set_fw_state_locked(ctx, SST_FW_RUNNING); }

+ if (ctx->pdata->streams_lost_on_suspend) { + for (i = 1; i <= ctx->info.max_streams; i++) { + struct stream_info *stream = &ctx->streams[i]; + + if (stream->resume_status != STREAM_UN_INIT) { + dev_dbg(ctx->dev, "Re-allocing stream %d status %d prev %d\n", + i, stream->resume_status, + stream->resume_prev); + sst_realloc_stream(ctx, i); + stream->status = stream->resume_status; + stream->prev = stream->resume_prev; + } + } + } + sst_free_block(ctx, block); return ret; } diff --git a/sound/soc/intel/atom/sst/sst.h b/sound/soc/intel/atom/sst/sst.h index a357cd615b59..b2a705dc9304 100644 --- a/sound/soc/intel/atom/sst/sst.h +++ b/sound/soc/intel/atom/sst/sst.h @@ -179,6 +179,8 @@ struct sst_block { * * @status : stream current state * @prev : stream prev state + * @resume_status : stream current state to restore on resume + * @resume_prev : stream prev state to restore on resume * @lock : stream mutex for protecting state * @alloc_param : parameters used for stream (re-)allocation * @pcm_substream : PCM substream @@ -189,6 +191,8 @@ struct sst_block { struct stream_info { unsigned int status; unsigned int prev; + unsigned int resume_status; + unsigned int resume_prev; struct mutex lock; struct snd_sst_alloc_mrfld alloc_param;

diff --git a/sound/soc/intel/atom/sst/sst_acpi.c b/sound/soc/intel/atom/sst/sst_acpi.c index 6cd481bec275..c90b04cc071d 100644 --- a/sound/soc/intel/atom/sst/sst_acpi.c +++ b/sound/soc/intel/atom/sst/sst_acpi.c @@ -143,10 +143,11 @@ static struct sst_platform_info byt_rvp_platform_data = { .lib_info = &byt_lib_dnld_info, .res_info = &byt_rvp_res_info, .platform = "sst-mfld-platform", + .streams_lost_on_suspend = true, };

/* Cherryview (Cherrytrail and Braswell) uses same mrfld dpcm fw as Baytrail, - * so pdata is same as Baytrail. + * so pdata is same as Baytrail, minus the streams_lost_on_suspend quirk. */ static struct sst_platform_info chv_platform_data = { .probe_data = &byt_fwparse_info, diff --git a/sound/soc/intel/atom/sst/sst_stream.c b/sound/soc/intel/atom/sst/sst_stream.c index fcedaa237505..107271f7dd63 100644 --- a/sound/soc/intel/atom/sst/sst_stream.c +++ b/sound/soc/intel/atom/sst/sst_stream.c @@ -302,7 +302,29 @@ int sst_resume_stream(struct intel_sst_drv *sst_drv_ctx, int str_id) return -EINVAL; if (str_info->status == STREAM_RUNNING) return 0; - if (str_info->status == STREAM_PAUSED) { + + if (str_info->resume_status == STREAM_PAUSED && + str_info->resume_prev == STREAM_RUNNING) { + /* + * Stream was running before suspend and re-created on resume, + * start it to get back to running state. + */ + dev_dbg(sst_drv_ctx->dev, "restart recreated stream after resume\n"); + str_info->status = STREAM_RUNNING; + str_info->prev = STREAM_PAUSED; + retval = sst_start_stream(sst_drv_ctx, str_id); + str_info->resume_status = STREAM_UN_INIT; + } else if (str_info->resume_status == STREAM_PAUSED && + str_info->resume_prev == STREAM_INIT) { + /* + * Stream was idle before suspend and re-created on resume, + * keep it as is. + */ + dev_dbg(sst_drv_ctx->dev, "leaving recreated stream idle after resume\n"); + str_info->status = STREAM_INIT; + str_info->prev = STREAM_PAUSED; + str_info->resume_status = STREAM_UN_INIT; + } else if (str_info->status == STREAM_PAUSED) { retval = sst_prepare_and_post_msg(sst_drv_ctx, str_info->task_id, IPC_CMD, IPC_IA_RESUME_STREAM_MRFLD, str_info->pipe_id, 0, NULL, NULL,