From feba8ec26f8ce2ddda4c96fc6adf4fdbaa2aba2f Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Tue, 31 Oct 2023 18:33:07 -0500 Subject: [PATCH 1/4] ASoC: SOF: Intel: hda-loader: add flag to tag ICCMAX stream The existing code conflates capture stream and ICCMAX stream. This isn't going to be true any longer when we add support for SDW BPT RX streams. Add a boolean tag to flag ICCMAX streams. No functionality change, only future-proofing change. Signed-off-by: Pierre-Louis Bossart --- sound/soc/sof/intel/hda-loader.c | 10 +++++----- sound/soc/sof/intel/hda.h | 2 +- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/sound/soc/sof/intel/hda-loader.c b/sound/soc/sof/intel/hda-loader.c index 1805cf754beb33..e93f4429d1d22c 100644 --- a/sound/soc/sof/intel/hda-loader.c +++ b/sound/soc/sof/intel/hda-loader.c @@ -45,7 +45,7 @@ static void hda_ssp_set_cbp_cfp(struct snd_sof_dev *sdev) struct hdac_ext_stream *hda_cl_stream_prepare(struct snd_sof_dev *sdev, unsigned int format, unsigned int size, struct snd_dma_buffer *dmab, - int direction) + int direction, bool is_iccmax) { struct hdac_ext_stream *hext_stream; struct hdac_stream *hstream; @@ -72,7 +72,7 @@ struct hdac_ext_stream *hda_cl_stream_prepare(struct snd_sof_dev *sdev, unsigned hstream->format_val = format; hstream->bufsize = size; - if (direction == SNDRV_PCM_STREAM_CAPTURE) { + if (is_iccmax) { ret = hda_dsp_iccmax_stream_hw_params(sdev, hext_stream, dmab, NULL); if (ret < 0) { dev_err(sdev->dev, "error: iccmax stream prepare failed: %d\n", ret); @@ -334,7 +334,7 @@ int hda_dsp_cl_boot_firmware_iccmax(struct snd_sof_dev *sdev) * the data, so use a buffer of PAGE_SIZE for receiving. */ iccmax_stream = hda_cl_stream_prepare(sdev, HDA_CL_STREAM_FORMAT, PAGE_SIZE, - &dmab_bdl, SNDRV_PCM_STREAM_CAPTURE); + &dmab_bdl, SNDRV_PCM_STREAM_CAPTURE, true); if (IS_ERR(iccmax_stream)) { dev_err(sdev->dev, "error: dma prepare for ICCMAX stream failed\n"); return PTR_ERR(iccmax_stream); @@ -420,7 +420,7 @@ int hda_dsp_cl_boot_firmware(struct snd_sof_dev *sdev) /* prepare DMA for code loader stream */ hext_stream = hda_cl_stream_prepare(sdev, HDA_CL_STREAM_FORMAT, stripped_firmware.size, - &dmab, SNDRV_PCM_STREAM_PLAYBACK); + &dmab, SNDRV_PCM_STREAM_PLAYBACK, false); if (IS_ERR(hext_stream)) { dev_err(sdev->dev, "error: dma prepare for fw loading failed\n"); return PTR_ERR(hext_stream); @@ -536,7 +536,7 @@ int hda_dsp_ipc4_load_library(struct snd_sof_dev *sdev, /* prepare DMA for code loader stream */ hext_stream = hda_cl_stream_prepare(sdev, HDA_CL_STREAM_FORMAT, stripped_firmware.size, - &dmab, SNDRV_PCM_STREAM_PLAYBACK); + &dmab, SNDRV_PCM_STREAM_PLAYBACK, false); if (IS_ERR(hext_stream)) { dev_err(sdev->dev, "%s: DMA prepare failed\n", __func__); return PTR_ERR(hext_stream); diff --git a/sound/soc/sof/intel/hda.h b/sound/soc/sof/intel/hda.h index b11d92ef777447..79074d755d5098 100644 --- a/sound/soc/sof/intel/hda.h +++ b/sound/soc/sof/intel/hda.h @@ -697,7 +697,7 @@ int hda_dsp_cl_boot_firmware_iccmax(struct snd_sof_dev *sdev); int hda_cl_copy_fw(struct snd_sof_dev *sdev, struct hdac_ext_stream *hext_stream); struct hdac_ext_stream *hda_cl_stream_prepare(struct snd_sof_dev *sdev, unsigned int format, unsigned int size, struct snd_dma_buffer *dmab, - int direction); + int direction, bool is_iccmax); int hda_cl_cleanup(struct snd_sof_dev *sdev, struct snd_dma_buffer *dmab, struct hdac_ext_stream *hext_stream); int cl_dsp_init(struct snd_sof_dev *sdev, int stream_tag, bool imr_boot); From a395bb87ac7f0922d0fb7ca138226187b235cfa6 Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Thu, 9 Nov 2023 13:05:56 -0600 Subject: [PATCH 2/4] ASoC: SOF: Intel: hda-loader: change signature of code loader helpers We need to reuse cl_prepare, cl_trigger and cl_cleanup helpers from a SoundWire context where only the device information is available. Rather than pass the 'sdev' argument, use get_drvdata() to retrieve the required structure. For consistency, rename hda_cl_stream_prepare() as hda_cl_prepare(). These three helpers are also exported so that they can be referenced from another module. Signed-off-by: Pierre-Louis Bossart --- sound/soc/sof/intel/hda-loader.c | 50 +++++++++++++++++--------------- sound/soc/sof/intel/hda.h | 11 ++++--- 2 files changed, 34 insertions(+), 27 deletions(-) diff --git a/sound/soc/sof/intel/hda-loader.c b/sound/soc/sof/intel/hda-loader.c index e93f4429d1d22c..d74dab8f1e2426 100644 --- a/sound/soc/sof/intel/hda-loader.c +++ b/sound/soc/sof/intel/hda-loader.c @@ -43,13 +43,13 @@ static void hda_ssp_set_cbp_cfp(struct snd_sof_dev *sdev) } } -struct hdac_ext_stream *hda_cl_stream_prepare(struct snd_sof_dev *sdev, unsigned int format, - unsigned int size, struct snd_dma_buffer *dmab, - int direction, bool is_iccmax) +struct hdac_ext_stream *hda_cl_prepare(struct device *dev, unsigned int format, + unsigned int size, struct snd_dma_buffer *dmab, + int direction, bool is_iccmax) { + struct snd_sof_dev *sdev = dev_get_drvdata(dev); struct hdac_ext_stream *hext_stream; struct hdac_stream *hstream; - struct pci_dev *pci = to_pci_dev(sdev->dev); int ret; hext_stream = hda_dsp_stream_get(sdev, direction, 0); @@ -62,7 +62,7 @@ struct hdac_ext_stream *hda_cl_stream_prepare(struct snd_sof_dev *sdev, unsigned hstream->substream = NULL; /* allocate DMA buffer */ - ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV_SG, &pci->dev, size, dmab); + ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV_SG, dev, size, dmab); if (ret < 0) { dev_err(sdev->dev, "error: memory alloc failed: %d\n", ret); goto out_put; @@ -95,6 +95,7 @@ struct hdac_ext_stream *hda_cl_stream_prepare(struct snd_sof_dev *sdev, unsigned hda_dsp_stream_put(sdev, direction, hstream->stream_tag); return ERR_PTR(ret); } +EXPORT_SYMBOL_NS(hda_cl_prepare, SND_SOC_SOF_INTEL_HDA_COMMON); /* * first boot sequence has some extra steps. @@ -219,9 +220,9 @@ int cl_dsp_init(struct snd_sof_dev *sdev, int stream_tag, bool imr_boot) return ret; } -static int cl_trigger(struct snd_sof_dev *sdev, - struct hdac_ext_stream *hext_stream, int cmd) +int hda_cl_trigger(struct device *dev, struct hdac_ext_stream *hext_stream, int cmd) { + struct snd_sof_dev *sdev = dev_get_drvdata(dev); struct hdac_stream *hstream = &hext_stream->hstream; int sd_offset = SOF_STREAM_SD_OFFSET(hstream); @@ -245,10 +246,12 @@ static int cl_trigger(struct snd_sof_dev *sdev, return hda_dsp_stream_trigger(sdev, hext_stream, cmd); } } +EXPORT_SYMBOL_NS(hda_cl_trigger, SND_SOC_SOF_INTEL_HDA_COMMON); -int hda_cl_cleanup(struct snd_sof_dev *sdev, struct snd_dma_buffer *dmab, +int hda_cl_cleanup(struct device *dev, struct snd_dma_buffer *dmab, struct hdac_ext_stream *hext_stream) { + struct snd_sof_dev *sdev = dev_get_drvdata(dev); struct hdac_stream *hstream = &hext_stream->hstream; int sd_offset = SOF_STREAM_SD_OFFSET(hstream); int ret = 0; @@ -277,6 +280,7 @@ int hda_cl_cleanup(struct snd_sof_dev *sdev, struct snd_dma_buffer *dmab, return ret; } +EXPORT_SYMBOL_NS(hda_cl_cleanup, SND_SOC_SOF_INTEL_HDA_COMMON); int hda_cl_copy_fw(struct snd_sof_dev *sdev, struct hdac_ext_stream *hext_stream) { @@ -285,7 +289,7 @@ int hda_cl_copy_fw(struct snd_sof_dev *sdev, struct hdac_ext_stream *hext_stream unsigned int reg; int ret, status; - ret = cl_trigger(sdev, hext_stream, SNDRV_PCM_TRIGGER_START); + ret = hda_cl_trigger(sdev->dev, hext_stream, SNDRV_PCM_TRIGGER_START); if (ret < 0) { dev_err(sdev->dev, "error: DMA trigger start failed\n"); return ret; @@ -308,7 +312,7 @@ int hda_cl_copy_fw(struct snd_sof_dev *sdev, struct hdac_ext_stream *hext_stream __func__, chip->rom_status_reg); } - ret = cl_trigger(sdev, hext_stream, SNDRV_PCM_TRIGGER_STOP); + ret = hda_cl_trigger(sdev->dev, hext_stream, SNDRV_PCM_TRIGGER_STOP); if (ret < 0) { dev_err(sdev->dev, "error: DMA trigger stop failed\n"); if (!status) @@ -333,8 +337,8 @@ int hda_dsp_cl_boot_firmware_iccmax(struct snd_sof_dev *sdev) * Prepare capture stream for ICCMAX. We do not need to store * the data, so use a buffer of PAGE_SIZE for receiving. */ - iccmax_stream = hda_cl_stream_prepare(sdev, HDA_CL_STREAM_FORMAT, PAGE_SIZE, - &dmab_bdl, SNDRV_PCM_STREAM_CAPTURE, true); + iccmax_stream = hda_cl_prepare(sdev->dev, HDA_CL_STREAM_FORMAT, PAGE_SIZE, + &dmab_bdl, SNDRV_PCM_STREAM_CAPTURE, true); if (IS_ERR(iccmax_stream)) { dev_err(sdev->dev, "error: dma prepare for ICCMAX stream failed\n"); return PTR_ERR(iccmax_stream); @@ -346,7 +350,7 @@ int hda_dsp_cl_boot_firmware_iccmax(struct snd_sof_dev *sdev) * Perform iccmax stream cleanup. This should be done even if firmware loading fails. * If the cleanup also fails, we return the initial error */ - ret1 = hda_cl_cleanup(sdev, &dmab_bdl, iccmax_stream); + ret1 = hda_cl_cleanup(sdev->dev, &dmab_bdl, iccmax_stream); if (ret1 < 0) { dev_err(sdev->dev, "error: ICCMAX stream cleanup failed\n"); @@ -418,9 +422,9 @@ int hda_dsp_cl_boot_firmware(struct snd_sof_dev *sdev) init_waitqueue_head(&sdev->boot_wait); /* prepare DMA for code loader stream */ - hext_stream = hda_cl_stream_prepare(sdev, HDA_CL_STREAM_FORMAT, - stripped_firmware.size, - &dmab, SNDRV_PCM_STREAM_PLAYBACK, false); + hext_stream = hda_cl_prepare(sdev->dev, HDA_CL_STREAM_FORMAT, + stripped_firmware.size, + &dmab, SNDRV_PCM_STREAM_PLAYBACK, false); if (IS_ERR(hext_stream)) { dev_err(sdev->dev, "error: dma prepare for fw loading failed\n"); return PTR_ERR(hext_stream); @@ -493,7 +497,7 @@ int hda_dsp_cl_boot_firmware(struct snd_sof_dev *sdev) * This should be done even if firmware loading fails. * If the cleanup also fails, we return the initial error */ - ret1 = hda_cl_cleanup(sdev, &dmab, hext_stream); + ret1 = hda_cl_cleanup(sdev->dev, &dmab, hext_stream); if (ret1 < 0) { dev_err(sdev->dev, "error: Code loader DSP cleanup failed\n"); @@ -534,9 +538,9 @@ int hda_dsp_ipc4_load_library(struct snd_sof_dev *sdev, stripped_firmware.size = fw_lib->sof_fw.fw->size - fw_lib->sof_fw.payload_offset; /* prepare DMA for code loader stream */ - hext_stream = hda_cl_stream_prepare(sdev, HDA_CL_STREAM_FORMAT, - stripped_firmware.size, - &dmab, SNDRV_PCM_STREAM_PLAYBACK, false); + hext_stream = hda_cl_prepare(sdev->dev, HDA_CL_STREAM_FORMAT, + stripped_firmware.size, + &dmab, SNDRV_PCM_STREAM_PLAYBACK, false); if (IS_ERR(hext_stream)) { dev_err(sdev->dev, "%s: DMA prepare failed\n", __func__); return PTR_ERR(hext_stream); @@ -579,7 +583,7 @@ int hda_dsp_ipc4_load_library(struct snd_sof_dev *sdev, goto cleanup; } - ret = cl_trigger(sdev, hext_stream, SNDRV_PCM_TRIGGER_START); + ret = hda_cl_trigger(sdev->dev, hext_stream, SNDRV_PCM_TRIGGER_START); if (ret < 0) { dev_err(sdev->dev, "%s: DMA trigger start failed\n", __func__); goto cleanup; @@ -596,7 +600,7 @@ int hda_dsp_ipc4_load_library(struct snd_sof_dev *sdev, ret = sof_ipc_tx_message_no_reply(sdev->ipc, &msg, 0); /* Stop the DMA channel */ - ret1 = cl_trigger(sdev, hext_stream, SNDRV_PCM_TRIGGER_STOP); + ret1 = hda_cl_trigger(sdev->dev, hext_stream, SNDRV_PCM_TRIGGER_STOP); if (ret1 < 0) { dev_err(sdev->dev, "%s: DMA trigger stop failed\n", __func__); if (!ret) @@ -605,7 +609,7 @@ int hda_dsp_ipc4_load_library(struct snd_sof_dev *sdev, cleanup: /* clean up even in case of error and return the first error */ - ret1 = hda_cl_cleanup(sdev, &dmab, hext_stream); + ret1 = hda_cl_cleanup(sdev->dev, &dmab, hext_stream); if (ret1 < 0) { dev_err(sdev->dev, "%s: Code loader DSP cleanup failed\n", __func__); diff --git a/sound/soc/sof/intel/hda.h b/sound/soc/sof/intel/hda.h index 79074d755d5098..25f35688d20c08 100644 --- a/sound/soc/sof/intel/hda.h +++ b/sound/soc/sof/intel/hda.h @@ -695,10 +695,13 @@ int hda_dsp_ipc_cmd_done(struct snd_sof_dev *sdev, int dir); int hda_dsp_cl_boot_firmware(struct snd_sof_dev *sdev); int hda_dsp_cl_boot_firmware_iccmax(struct snd_sof_dev *sdev); int hda_cl_copy_fw(struct snd_sof_dev *sdev, struct hdac_ext_stream *hext_stream); -struct hdac_ext_stream *hda_cl_stream_prepare(struct snd_sof_dev *sdev, unsigned int format, - unsigned int size, struct snd_dma_buffer *dmab, - int direction, bool is_iccmax); -int hda_cl_cleanup(struct snd_sof_dev *sdev, struct snd_dma_buffer *dmab, + +struct hdac_ext_stream *hda_cl_prepare(struct device *dev, unsigned int format, + unsigned int size, struct snd_dma_buffer *dmab, + int direction, bool is_iccmax); +int hda_cl_trigger(struct device *dev, struct hdac_ext_stream *hext_stream, int cmd); + +int hda_cl_cleanup(struct device *dev, struct snd_dma_buffer *dmab, struct hdac_ext_stream *hext_stream); int cl_dsp_init(struct snd_sof_dev *sdev, int stream_tag, bool imr_boot); #define HDA_CL_STREAM_FORMAT 0x40 From 8451cdf40aff5ba4fd6cecca4455758d53b13898 Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Thu, 9 Nov 2023 18:43:31 -0600 Subject: [PATCH 3/4] ASoC: SOF: Intel: don't ignore IOC interrupts for non-audio transfers The HDaudio stream interrupts are ignored unless the stream is PCM or compressed audio. For alternate non-audio usages, such as code loader or SoundWire BPT case, the IOC interrupt on the last buffer transferred is silently ignored. This patch adds a 'struct completion' for each HDaudio stream. This capability helps detect if the non-audio data transfers completed. There is no performance impact for audio streams. In the code loader case, the code currently starts the DMA and directly checks if the firmware status changes, without checking if the DMA succeeded. With a first pass waiting for the DMA to complete, system validation engineers can gather more precise timing information on firmware boot time or root-cause boot failures more accurately. A timeout of 500ms was selected for the code loader DMA. This is an experimental value which should be more than enough - higher values would certainly be problematic from a usage/latency perspective. Signed-off-by: Pierre-Louis Bossart --- sound/soc/sof/intel/hda-loader.c | 28 ++++++++++++++++++++++++++++ sound/soc/sof/intel/hda-stream.c | 22 +++++++++++++++++++--- sound/soc/sof/intel/hda.h | 2 ++ 3 files changed, 49 insertions(+), 3 deletions(-) diff --git a/sound/soc/sof/intel/hda-loader.c b/sound/soc/sof/intel/hda-loader.c index d74dab8f1e2426..bc3256d714f091 100644 --- a/sound/soc/sof/intel/hda-loader.c +++ b/sound/soc/sof/intel/hda-loader.c @@ -225,10 +225,15 @@ int hda_cl_trigger(struct device *dev, struct hdac_ext_stream *hext_stream, int struct snd_sof_dev *sdev = dev_get_drvdata(dev); struct hdac_stream *hstream = &hext_stream->hstream; int sd_offset = SOF_STREAM_SD_OFFSET(hstream); + struct sof_intel_hda_stream *hda_stream; /* code loader is special case that reuses stream ops */ switch (cmd) { case SNDRV_PCM_TRIGGER_START: + hda_stream = container_of(hext_stream, struct sof_intel_hda_stream, + hext_stream); + reinit_completion(&hda_stream->ioc); + snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, SOF_HDA_INTCTL, 1 << hstream->index, 1 << hstream->index); @@ -282,19 +287,38 @@ int hda_cl_cleanup(struct device *dev, struct snd_dma_buffer *dmab, } EXPORT_SYMBOL_NS(hda_cl_cleanup, SND_SOC_SOF_INTEL_HDA_COMMON); +#define HDA_CL_DMA_IOC_TIMEOUT_MS 500 + int hda_cl_copy_fw(struct snd_sof_dev *sdev, struct hdac_ext_stream *hext_stream) { struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; const struct sof_intel_dsp_desc *chip = hda->desc; + struct sof_intel_hda_stream *hda_stream; + unsigned long time_left; unsigned int reg; int ret, status; + hda_stream = container_of(hext_stream, struct sof_intel_hda_stream, + hext_stream); + + dev_dbg(sdev->dev, "Code loader DMA starting\n"); + ret = hda_cl_trigger(sdev->dev, hext_stream, SNDRV_PCM_TRIGGER_START); if (ret < 0) { dev_err(sdev->dev, "error: DMA trigger start failed\n"); return ret; } + /* Wait for completion of transfer */ + time_left = wait_for_completion_timeout(&hda_stream->ioc, + msecs_to_jiffies(HDA_CL_DMA_IOC_TIMEOUT_MS)); + + if (!time_left) { + dev_err(sdev->dev, "Code loader DMA did not complete\n"); + return -ETIMEDOUT; + } + dev_dbg(sdev->dev, "Code loader DMA done, waiting for FW_ENTERED status\n"); + status = snd_sof_dsp_read_poll_timeout(sdev, HDA_DSP_BAR, chip->rom_status_reg, reg, (FSR_TO_STATE_CODE(reg) == FSR_STATE_FW_ENTERED), @@ -310,6 +334,8 @@ int hda_cl_copy_fw(struct snd_sof_dev *sdev, struct hdac_ext_stream *hext_stream dev_err(sdev->dev, "%s: timeout with rom_status_reg (%#x) read\n", __func__, chip->rom_status_reg); + } else { + dev_dbg(sdev->dev, "Code loader FW_ENTERED status\n"); } ret = hda_cl_trigger(sdev->dev, hext_stream, SNDRV_PCM_TRIGGER_STOP); @@ -317,6 +343,8 @@ int hda_cl_copy_fw(struct snd_sof_dev *sdev, struct hdac_ext_stream *hext_stream dev_err(sdev->dev, "error: DMA trigger stop failed\n"); if (!status) status = ret; + } else { + dev_dbg(sdev->dev, "Code loader DMA stopped\n"); } return status; diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c index f2ebadbbcc10e3..e7590150391319 100644 --- a/sound/soc/sof/intel/hda-stream.c +++ b/sound/soc/sof/intel/hda-stream.c @@ -764,10 +764,25 @@ static bool hda_dsp_stream_check(struct hdac_bus *bus, u32 status) writeb(sd_status, s->sd_addr + SOF_HDA_ADSP_REG_SD_STS); active = true; - if ((!s->substream && !s->cstream) || - !s->running || - (sd_status & SOF_HDA_CL_DMA_SD_INT_COMPLETE) == 0) + if (!s->running) continue; + if ((sd_status & SOF_HDA_CL_DMA_SD_INT_COMPLETE) == 0) + continue; + if (!s->substream && !s->cstream) { + /* + * when no substream is found, the DMA may used for code loading + * or data transfers which can rely on wait_for_completion() + */ + struct sof_intel_hda_stream *hda_stream; + struct hdac_ext_stream *hext_stream; + + hext_stream = stream_to_hdac_ext_stream(s); + hda_stream = container_of(hext_stream, struct sof_intel_hda_stream, + hext_stream); + + complete(&hda_stream->ioc); + continue; + } /* Inform ALSA only in case not do that with IPC */ if (s->substream && sof_hda->no_ipc_position) { @@ -879,6 +894,7 @@ int hda_dsp_stream_init(struct snd_sof_dev *sdev) return -ENOMEM; hda_stream->sdev = sdev; + init_completion(&hda_stream->ioc); hext_stream = &hda_stream->hext_stream; diff --git a/sound/soc/sof/intel/hda.h b/sound/soc/sof/intel/hda.h index 25f35688d20c08..27279343835b46 100644 --- a/sound/soc/sof/intel/hda.h +++ b/sound/soc/sof/intel/hda.h @@ -11,6 +11,7 @@ #ifndef __SOF_INTEL_HDA_H #define __SOF_INTEL_HDA_H +#include #include #include #include @@ -559,6 +560,7 @@ struct sof_intel_hda_stream { struct sof_intel_stream sof_intel_stream; int host_reserved; /* reserve host DMA channel */ u32 flags; + struct completion ioc; }; #define hstream_to_sof_hda_stream(hstream) \ From 1b67be76711746cdb80e73e0d3ad7a149f7ca16e Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Fri, 10 Nov 2023 10:34:37 -0600 Subject: [PATCH 4/4] ASoC: SOF: Intel: hda-stream: clarify comment The Yoda grammar and multiple negatives are unclear. Signed-off-by: Pierre-Louis Bossart --- sound/soc/sof/intel/hda-stream.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c index e7590150391319..157933da18cdfb 100644 --- a/sound/soc/sof/intel/hda-stream.c +++ b/sound/soc/sof/intel/hda-stream.c @@ -784,7 +784,7 @@ static bool hda_dsp_stream_check(struct hdac_bus *bus, u32 status) continue; } - /* Inform ALSA only in case not do that with IPC */ + /* Inform ALSA only if the IPC position is not used */ if (s->substream && sof_hda->no_ipc_position) { snd_sof_pcm_period_elapsed(s->substream); } else if (s->cstream) {