From: Maruthi Srinivas Bayyavarapu Maruthi.Bayyavarapu@amd.com

ACP IP block consists of dedicated DMA and I2S blocks. The PCM driver provides the DMA and CPU DAI components to ALSA core.

Signed-off-by: Maruthi Bayyavarapu maruthi.bayyavarapu@amd.com Reviewed-by: Alex Deucher alexander.deucher@amd.com Reviewed-by: Murali Krishna Vemuri murali-krishna.vemuri@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com ---

v2: - squash in Kconfig fix v3: - squash in the following patches: ASoC: AMD: add suspend/resume for ACP PCM driver ASoC: AMD: add ACP PCM driver runtime PM - Keep the Makefile sorted - Fix the Kconfig whitespace - drop RT286 changes to rework it using ACPI as a separate patch. The gpio stuff we need to handle this with ACPI was not added to the kernel until 4.2. This patch was originally developed much earlier. - put headers in include - remove static structure initialization - fix component name - remove casts from void - fix handling of combinations of play_intr and capture_intr - fix coding style with {} - switch to dev_ prints - remove substream checks handled by subsystem - fix whitespace in comments - pass return code directly on error from acp_dev->dma_start - drop references to designware - fix codeing style (STATUS_SUCCESS) - drop left over debugging messages - drop stuff that is already set in the dai_link - convert from using the amd_gnb_bus to an mfd cell v4: - change MODULE_ALIAS to platform:acp-i2s-audio v5: - failed attempt at a patch revision changelog v6: - respin the patch with a proper patch change log

The module licensing follows the model used in the drm drivers. AMD prefers to contribute code under an MIT/X11 license. IANAL, but "GPL and additional rights" as the MODULE_LICENSE seems to be compatible with that and is exactly what most of the drm drivers do.

sound/soc/Kconfig | 1 + sound/soc/Makefile | 1 + sound/soc/amd/Kconfig | 5 + sound/soc/amd/Makefile | 3 + sound/soc/amd/acp-pcm-dma.c | 676 ++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 686 insertions(+) create mode 100644 sound/soc/amd/Kconfig create mode 100644 sound/soc/amd/Makefile create mode 100644 sound/soc/amd/acp-pcm-dma.c

diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig index 2ae9619..1b9ce31 100644 --- a/sound/soc/Kconfig +++ b/sound/soc/Kconfig @@ -32,6 +32,7 @@ config SND_SOC_GENERIC_DMAENGINE_PCM

# All the supported SoCs source "sound/soc/adi/Kconfig" +source "sound/soc/amd/Kconfig" source "sound/soc/atmel/Kconfig" source "sound/soc/au1x/Kconfig" source "sound/soc/bcm/Kconfig" diff --git a/sound/soc/Makefile b/sound/soc/Makefile index e189903..a6cbb99 100644 --- a/sound/soc/Makefile +++ b/sound/soc/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_SND_SOC) += snd-soc-core.o obj-$(CONFIG_SND_SOC) += codecs/ obj-$(CONFIG_SND_SOC) += generic/ obj-$(CONFIG_SND_SOC) += adi/ +obj-$(CONFIG_SND_SOC) += amd/ obj-$(CONFIG_SND_SOC) += atmel/ obj-$(CONFIG_SND_SOC) += au1x/ obj-$(CONFIG_SND_SOC) += bcm/ diff --git a/sound/soc/amd/Kconfig b/sound/soc/amd/Kconfig new file mode 100644 index 0000000..ce39979 --- /dev/null +++ b/sound/soc/amd/Kconfig @@ -0,0 +1,5 @@ +config SND_SOC_AMD_ACP + tristate "AMD Audio Coprocessor support" + depends on MFD_CORE + help + This option enables ACP support (DMA,I2S) on AMD platforms. diff --git a/sound/soc/amd/Makefile b/sound/soc/amd/Makefile new file mode 100644 index 0000000..1a66ec0 --- /dev/null +++ b/sound/soc/amd/Makefile @@ -0,0 +1,3 @@ +snd-soc-acp-pcm-objs := acp-pcm-dma.o + +obj-$(CONFIG_SND_SOC_AMD_ACP) += snd-soc-acp-pcm.o diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c new file mode 100644 index 0000000..18cc60c --- /dev/null +++ b/sound/soc/amd/acp-pcm-dma.c @@ -0,0 +1,676 @@ +/* + * AMD ALSA SoC PCM Driver + * + * Copyright 2014-2015 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * + */ + +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/pci.h> +#include <linux/pm_runtime.h> +#include <linux/mfd/amd_acp.h> + +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#define PLAYBACK_MIN_NUM_PERIODS 2 +#define PLAYBACK_MAX_NUM_PERIODS 2 +#define PLAYBACK_MAX_PERIOD_SIZE 16384 +#define PLAYBACK_MIN_PERIOD_SIZE 1024 +#define CAPTURE_MIN_NUM_PERIODS 2 +#define CAPTURE_MAX_NUM_PERIODS 2 +#define CAPTURE_MAX_PERIOD_SIZE 16384 +#define CAPTURE_MIN_PERIOD_SIZE 1024 + +#define NUM_DSCRS_PER_CHANNEL 2 + +#define MAX_BUFFER (PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS) +#define MIN_BUFFER MAX_BUFFER + +#define TWO_CHANNEL_SUPPORT 2 /* up to 2.0 */ +#define FOUR_CHANNEL_SUPPORT 4 /* up to 3.1 */ +#define SIX_CHANNEL_SUPPORT 6 /* up to 5.1 */ +#define EIGHT_CHANNEL_SUPPORT 8 /* up to 7.1 */ + + +static const struct snd_pcm_hardware acp_pcm_hardware_playback = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, + /* formats,rates,channels based on i2s doc. */ + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE, + .channels_min = 1, + .channels_max = 8, + .rates = SNDRV_PCM_RATE_8000_96000, + .rate_min = 8000, + .rate_max = 96000, + .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE, + .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE, + .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE, + .periods_min = PLAYBACK_MIN_NUM_PERIODS, + .periods_max = PLAYBACK_MAX_NUM_PERIODS, +}; + +static const struct snd_pcm_hardware acp_pcm_hardware_capture = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, + /* formats,rates,channels based on i2s doc. */ + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE, + .channels_min = 1, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .rate_min = 8000, + .rate_max = 48000, + .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE, + .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE, + .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE, + .periods_min = CAPTURE_MIN_NUM_PERIODS, + .periods_max = CAPTURE_MAX_NUM_PERIODS, +}; + +struct audio_drv_data { + struct snd_pcm_substream *play_stream; + struct snd_pcm_substream *capture_stream; + struct amd_acp_device *acp_dev; + struct acp_irq_prv *iprv; +}; + +static const struct snd_soc_component_driver dw_i2s_component = { + .name = "dw-i2s", +}; + +static void acp_pcm_period_elapsed(struct device *dev, u16 play_intr, + u16 capture_intr) +{ + struct snd_pcm_substream *substream; + struct audio_drv_data *irq_data = dev_get_drvdata(dev); + + /* Inform ALSA about the period elapsed (one out of two periods) */ + if (play_intr) + substream = irq_data->play_stream; + else + substream = irq_data->capture_stream; + + if (substream->runtime && snd_pcm_running(substream)) + snd_pcm_period_elapsed(substream); +} + +static int acp_dma_open(struct snd_pcm_substream *substream) +{ + int ret = 0; + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_pcm_runtime *prtd = substream->private_data; + struct audio_drv_data *intr_data = dev_get_drvdata(prtd->platform->dev); + + struct audio_substream_data *adata = + kzalloc(sizeof(struct audio_substream_data), GFP_KERNEL); + if (adata == NULL) + return -ENOMEM; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + runtime->hw = acp_pcm_hardware_playback; + else + runtime->hw = acp_pcm_hardware_capture; + + ret = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (ret < 0) { + dev_err(prtd->platform->dev, "set integer constraint failed\n"); + return ret; + } + + adata->acp_dev = intr_data->acp_dev; + runtime->private_data = adata; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + intr_data->play_stream = substream; + else + intr_data->capture_stream = substream; + + return 0; +} + +static int acp_dma_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + int status; + uint64_t size; + struct snd_dma_buffer *dma_buffer; + struct page *pg; + u16 num_of_pages; + struct snd_pcm_runtime *runtime; + struct audio_substream_data *rtd; + struct amd_acp_device *acp_dev; + + dma_buffer = &substream->dma_buffer; + + runtime = substream->runtime; + rtd = runtime->private_data; + + if (WARN_ON(!rtd)) + return -EINVAL; + acp_dev = rtd->acp_dev; + + size = params_buffer_bytes(params); + status = snd_pcm_lib_malloc_pages(substream, size); + if (status < 0) + return status; + + memset(substream->runtime->dma_area, 0, params_buffer_bytes(params)); + pg = virt_to_page(substream->dma_buffer.area); + + if (NULL != pg) { + /* Save for runtime private data */ + rtd->pg = pg; + rtd->order = get_order(size); + + /* Let ACP know the Allocated memory */ + num_of_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; + + /* Fill the page table entries in ACP SRAM */ + rtd->pg = pg; + rtd->size = size; + rtd->num_of_pages = num_of_pages; + rtd->direction = substream->stream; + + acp_dev->config_dma(acp_dev, rtd); + status = 0; + } else { + status = -ENOMEM; + } + return status; +} + +static int acp_dma_hw_free(struct snd_pcm_substream *substream) +{ + return snd_pcm_lib_free_pages(substream); +} + +static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream) +{ + u32 pos = 0; + struct snd_pcm_runtime *runtime = substream->runtime; + struct audio_substream_data *rtd = runtime->private_data; + struct amd_acp_device *acp_dev = rtd->acp_dev; + + pos = acp_dev->update_dma_pointer(acp_dev, substream->stream, + frames_to_bytes(runtime, runtime->period_size)); + return bytes_to_frames(runtime, pos); + +} + +static int acp_dma_mmap(struct snd_pcm_substream *substream, + struct vm_area_struct *vma) +{ + return snd_pcm_lib_default_mmap(substream, vma); +} + +static int acp_dma_prepare(struct snd_pcm_substream *substream) +{ + int ret; + struct snd_pcm_runtime *runtime = substream->runtime; + struct audio_substream_data *rtd = runtime->private_data; + struct amd_acp_device *acp_dev = rtd->acp_dev; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + + acp_dev->config_dma_channel(acp_dev, SYSRAM_TO_ACP_CH_NUM, + PLAYBACK_START_DMA_DESCR_CH12, + NUM_DSCRS_PER_CHANNEL, 0); + acp_dev->config_dma_channel(acp_dev, ACP_TO_I2S_DMA_CH_NUM, + PLAYBACK_START_DMA_DESCR_CH13, + NUM_DSCRS_PER_CHANNEL, 0); + /* Fill ACP SRAM (2 periods) with zeros from System RAM + * which is zero-ed in hw_params */ + ret = acp_dev->dma_start(rtd->acp_dev, + SYSRAM_TO_ACP_CH_NUM, false); + if (ret < 0) + ret = -EFAULT; + + /* Now configure DMA to transfer only first half of System RAM + * buffer before playback is triggered. This will overwrite + * zero-ed second half of SRAM buffer */ + acp_dev->config_dma_channel(acp_dev, SYSRAM_TO_ACP_CH_NUM, + PLAYBACK_START_DMA_DESCR_CH12, + 1, 0); + } else { + acp_dev->config_dma_channel(acp_dev, ACP_TO_SYSRAM_CH_NUM, + CAPTURE_START_DMA_DESCR_CH14, + NUM_DSCRS_PER_CHANNEL, 0); + acp_dev->config_dma_channel(acp_dev, I2S_TO_ACP_DMA_CH_NUM, + CAPTURE_START_DMA_DESCR_CH15, + NUM_DSCRS_PER_CHANNEL, 0); + } + return 0; +} + +static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct audio_substream_data *rtd = runtime->private_data; + struct amd_acp_device *acp_dev = rtd->acp_dev; + int ret; + + if (!rtd) + return -EINVAL; + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + ret = acp_dev->dma_start(rtd->acp_dev, + SYSRAM_TO_ACP_CH_NUM, false); + if (ret < 0) + return -EFAULT; + acp_dev->prebuffer_audio(rtd->acp_dev); + + ret = acp_dev->dma_start(acp_dev, + ACP_TO_I2S_DMA_CH_NUM, true); + } else { + ret = acp_dev->dma_start(acp_dev, + I2S_TO_ACP_DMA_CH_NUM, true); + } + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + ret = acp_dev->dma_stop(acp_dev, SYSRAM_TO_ACP_CH_NUM); + if (0 == ret) + ret = acp_dev->dma_stop(acp_dev, + ACP_TO_I2S_DMA_CH_NUM); + } else { + ret = acp_dev->dma_stop(acp_dev, I2S_TO_ACP_DMA_CH_NUM); + if (0 == ret) + ret = acp_dev->dma_stop(acp_dev, + ACP_TO_SYSRAM_CH_NUM); + } + break; + default: + ret = -EINVAL; + + } + return ret; +} + +static int acp_dma_new(struct snd_soc_pcm_runtime *rtd) +{ + int ret; + struct snd_pcm *pcm; + + pcm = rtd->pcm; + ret = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, + NULL, MIN_BUFFER, MAX_BUFFER); + return ret; +} + +static int acp_dma_close(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct audio_substream_data *rtd = runtime->private_data; + struct snd_soc_pcm_runtime *prtd = substream->private_data; + + kfree(rtd); + + pm_runtime_mark_last_busy(prtd->platform->dev); + return 0; +} + +static int acp_dai_i2s_hwparams(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_pcm_runtime *prtd = substream->private_data; + struct audio_substream_data *rtd = runtime->private_data; + struct amd_acp_device *acp_dev = rtd->acp_dev; + struct device *dev = prtd->platform->dev; + u32 chan_nr; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + rtd->xfer_resolution = 0x02; + break; + + case SNDRV_PCM_FORMAT_S24_LE: + rtd->xfer_resolution = 0x04; + break; + + case SNDRV_PCM_FORMAT_S32_LE: + rtd->xfer_resolution = 0x05; + break; + + default: + dev_err(dev, "unsuppted PCM fmt : %d\n", params_format(params)); + return -EINVAL; + } + + chan_nr = params_channels(params); + + switch (chan_nr) { + case EIGHT_CHANNEL_SUPPORT: + rtd->ch_reg = 3; + break; + case SIX_CHANNEL_SUPPORT: + rtd->ch_reg = 2; + break; + case FOUR_CHANNEL_SUPPORT: + rtd->ch_reg = 1; + break; + case TWO_CHANNEL_SUPPORT: + rtd->ch_reg = 0; + break; + default: + dev_err(dev, "channel not supported : %d\n", chan_nr); + return -EINVAL; + } + + rtd->direction = substream->stream; + + acp_dev->config_i2s(acp_dev, rtd); + + return 0; +} + +static int acp_dai_i2s_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct audio_substream_data *rtd = runtime->private_data; + struct amd_acp_device *acp_dev = rtd->acp_dev; + int ret; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + acp_dev->i2s_start(acp_dev, substream->stream); + ret = 0; + break; + + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + acp_dev->i2s_stop(acp_dev, substream->stream); + ret = 0; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int acp_dai_i2s_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct audio_substream_data *rtd = runtime->private_data; + struct amd_acp_device *acp_dev = rtd->acp_dev; + + acp_dev->i2s_reset(acp_dev, substream->stream); + return 0; +} + +static struct snd_pcm_ops acp_dma_ops = { + .open = acp_dma_open, + .close = acp_dma_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = acp_dma_hw_params, + .hw_free = acp_dma_hw_free, + .trigger = acp_dma_trigger, + .pointer = acp_dma_pointer, + .mmap = acp_dma_mmap, + .prepare = acp_dma_prepare, +}; + +static struct snd_soc_dai_ops acp_dai_i2s_ops = { + .prepare = acp_dai_i2s_prepare, + .hw_params = acp_dai_i2s_hwparams, + .trigger = acp_dai_i2s_trigger, +}; + +static struct snd_soc_dai_driver i2s_dai_driver = { + .playback = { + .stream_name = "I2S Playback", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_96000, + .formats = SNDRV_PCM_FMTBIT_S24_LE | + SNDRV_PCM_FMTBIT_S32_LE, + + .rate_min = 8000, + .rate_max = 96000, + }, + .capture = { + .stream_name = "I2S Capture", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = SNDRV_PCM_FMTBIT_S24_LE | + SNDRV_PCM_FMTBIT_S32_LE, + .rate_min = 8000, + .rate_max = 48000, + }, + .ops = &acp_dai_i2s_ops, +}; + +static struct snd_soc_platform_driver acp_asoc_platform = { + .ops = &acp_dma_ops, + .pcm_new = acp_dma_new, +}; + +static int acp_alsa_register(struct device *dev, struct amd_acp_device *acp_dev, + struct platform_device *pdev) +{ + int status; + + status = snd_soc_register_platform(dev, &acp_asoc_platform); + if (0 != status) { + dev_err(dev, "Unable to register ALSA platform device\n"); + goto exit_platform; + } else { + status = snd_soc_register_component(dev, + &dw_i2s_component, + &i2s_dai_driver, 1); + + if (0 != status) { + dev_err(dev, "Unable to register i2s dai\n"); + goto exit_dai; + } else { + dev_info(dev, "ACP device registered with ALSA\n"); + return status; + } + } + +exit_dai: + snd_soc_unregister_platform(dev); +exit_platform: + acp_dev->fini(acp_dev); + return status; +} + +static int acp_audio_probe(struct platform_device *pdev) +{ + int status; + struct audio_drv_data *audio_drv_data; + struct amd_acp_device *acp_dev = dev_get_platdata(&pdev->dev); + + audio_drv_data = devm_kzalloc(&pdev->dev, sizeof(struct audio_drv_data), + GFP_KERNEL); + if (audio_drv_data == NULL) + return -ENOMEM; + + audio_drv_data->iprv = devm_kzalloc(&pdev->dev, + sizeof(struct acp_irq_prv), + GFP_KERNEL); + if (audio_drv_data->iprv == NULL) + return -ENOMEM; + + /* The following members gets populated in device 'open' + * function. Till then interrupts are disabled in 'acp_hw_init' + * and device doesn't generate any interrupts. + */ + + audio_drv_data->play_stream = NULL; + audio_drv_data->capture_stream = NULL; + audio_drv_data->acp_dev = acp_dev; + + audio_drv_data->iprv->dev = &pdev->dev; + audio_drv_data->iprv->acp_dev = acp_dev; + audio_drv_data->iprv->set_elapsed = acp_pcm_period_elapsed; + + dev_set_drvdata(&pdev->dev, audio_drv_data); + + /* Initialize the ACP */ + status = acp_dev->init(acp_dev, audio_drv_data->iprv); + + if (0 == status) + status = acp_alsa_register(&pdev->dev, acp_dev, pdev); + else + dev_err(&pdev->dev, "ACP initialization Failed\n"); + + pm_runtime_set_autosuspend_delay(&pdev->dev, 10000); + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_enable(&pdev->dev); + + return status; +} + +static int acp_audio_remove(struct platform_device *pdev) +{ + struct amd_acp_device *acp_dev = dev_get_platdata(&pdev->dev); + + snd_soc_unregister_component(&pdev->dev); + snd_soc_unregister_platform(&pdev->dev); + + acp_dev->fini(acp_dev); + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static int acp_pcm_suspend(struct device *dev) +{ + bool pm_rts; + struct audio_drv_data *adata = dev_get_drvdata(dev); + + pm_rts = pm_runtime_status_suspended(dev); + if (pm_rts == false) + adata->acp_dev->fini(adata->acp_dev); + + return 0; +} + +static int acp_pcm_resume(struct device *dev) +{ + bool pm_rts; + struct snd_pcm_substream *pstream, *cstream; + struct snd_pcm_runtime *prtd, *crtd; + struct audio_substream_data *rtd; + struct audio_drv_data *adata = dev_get_drvdata(dev); + + pm_rts = pm_runtime_status_suspended(dev); + if (pm_rts == true) { + /* Resumed from system wide suspend and there is + * no pending audio activity to resume. */ + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + goto out; + } + + pstream = adata->play_stream; + prtd = pstream ? pstream->runtime : NULL; + if (prtd != NULL) { + /* Resume playback stream from a suspended state */ + rtd = prtd->private_data; + + adata->acp_dev->config_dma(adata->acp_dev, rtd); + adata->acp_dev->config_i2s(adata->acp_dev, rtd); + } + + cstream = adata->capture_stream; + crtd = cstream ? cstream->runtime : NULL; + if (crtd != NULL) { + /* Resume capture stream from a suspended state */ + rtd = crtd->private_data; + + adata->acp_dev->config_dma(adata->acp_dev, rtd); + adata->acp_dev->config_i2s(adata->acp_dev, rtd); + } +out: + return 0; +} + +static int acp_pcm_runtime_suspend(struct device *dev) +{ + struct audio_drv_data *adata = dev_get_drvdata(dev); + + adata->acp_dev->acp_suspend(adata->acp_dev); + return 0; +} + +static int acp_pcm_runtime_resume(struct device *dev) +{ + struct audio_drv_data *adata = dev_get_drvdata(dev); + + adata->acp_dev->acp_resume(adata->acp_dev); + return 0; +} + +static const struct dev_pm_ops acp_pm_ops = { + .suspend = acp_pcm_suspend, + .resume = acp_pcm_resume, + .runtime_suspend = acp_pcm_runtime_suspend, + .runtime_resume = acp_pcm_runtime_resume, +}; + +static struct platform_driver acp_dma_driver = { + .probe = acp_audio_probe, + .remove = acp_audio_remove, + .driver = { + .name = "acp-i2s-audio", + .pm = &acp_pm_ops, + }, +}; + +module_platform_driver(acp_dma_driver); + +MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com"); +MODULE_DESCRIPTION("AMD ACP PCM Driver"); +MODULE_LICENSE("GPL and additional rights"); +MODULE_ALIAS("platform:acp-i2s-audio");