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Message-ID: <6768c0eb-003c-398b-6b44-8167d44b3cfe@linux.intel.com>
Date: Wed, 6 Nov 2019 10:31:38 -0600
From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To: Ravulapati Vishnu vardhan rao
<Vishnuvardhanrao.Ravulapati@....com>
Cc: "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..."
<alsa-devel@...a-project.org>,
Maruthi Bayyavarapu <maruthi.bayyavarapu@....com>,
Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
open list <linux-kernel@...r.kernel.org>,
Takashi Iwai <tiwai@...e.com>,
YueHaibing <yuehaibing@...wei.com>,
Liam Girdwood <lgirdwood@...il.com>, Akshu.Agrawal@....com,
Sanju R Mehta <sanju.mehta@....com>,
Mark Brown <broonie@...nel.org>, djkurtz@...gle.com,
Vijendar Mukunda <Vijendar.Mukunda@....com>,
Alex Deucher <alexander.deucher@....com>,
Colin Ian King <colin.king@...onical.com>
Subject: Re: [alsa-devel] [RESEND PATCH v2 2/7] ASoC: amd: Refactoring of DAI
from DMA driver
On 11/7/19 8:35 AM, Ravulapati Vishnu vardhan rao wrote:
> Asoc: PCM DMA driver should only have dma ops.
> So Removed all DAI related functionality.
> Refactoring the PCM DMA diver code.
> Added new file containing only DAI ops.
>
> Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@....com>
> ---
> sound/soc/amd/raven/Makefile | 2 +
> sound/soc/amd/raven/acp3x-i2s.c | 268 ++++++++++++++++++++++++++++++++++++
> sound/soc/amd/raven/acp3x-pcm-dma.c | 232 ++-----------------------------
> sound/soc/amd/raven/acp3x.h | 42 ++++++
> 4 files changed, 326 insertions(+), 218 deletions(-)
> create mode 100644 sound/soc/amd/raven/acp3x-i2s.c
>
> diff --git a/sound/soc/amd/raven/Makefile b/sound/soc/amd/raven/Makefile
> index 108d1ac..8eef292 100644
> --- a/sound/soc/amd/raven/Makefile
> +++ b/sound/soc/amd/raven/Makefile
> @@ -1,6 +1,8 @@
> # SPDX-License-Identifier: GPL-2.0+
> # Raven Ridge platform Support
> snd-pci-acp3x-objs := pci-acp3x.o
> +snd-acp3x-i2s-objs := acp3x-i2s.o
> snd-acp3x-pcm-dma-objs := acp3x-pcm-dma.o
> obj-$(CONFIG_SND_SOC_AMD_ACP3x) += snd-pci-acp3x.o
> +obj-$(CONFIG_SND_SOC_AMD_ACP3x) += snd-acp3x-i2s.o
> obj-$(CONFIG_SND_SOC_AMD_ACP3x) += snd-acp3x-pcm-dma.o
> diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
> new file mode 100644
> index 0000000..728e757
> --- /dev/null
> +++ b/sound/soc/amd/raven/acp3x-i2s.c
> @@ -0,0 +1,268 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +//
> +// AMD ALSA SoC PCM Driver
> +//
> +//Copyright 2016 Advanced Micro Devices, Inc.
> +
> +#include <linux/platform_device.h>
> +#include <linux/module.h>
> +#include <linux/err.h>
> +#include <linux/io.h>
> +#include <linux/pm_runtime.h>
> +#include <sound/pcm.h>
> +#include <sound/pcm_params.h>
> +#include <sound/soc.h>
> +#include <sound/soc-dai.h>
> +#include <linux/dma-mapping.h>
> +
> +#include "acp3x.h"
> +
> +#define DRV_NAME "acp3x-i2s"
> +
> +static int acp3x_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
> +{
> +
> + struct i2s_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai);
> +
> + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
> +
> + case SND_SOC_DAIFMT_I2S:
> + adata->tdm_mode = false;
> + break;
> + case SND_SOC_DAIFMT_DSP_A:
> + adata->tdm_mode = true;
> + break;
alignment is off
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
> + u32 rx_mask, int slots, int slot_width)
> +{
> + u32 val = 0;
init not needed
> + u16 slot_len;
> +
> + struct i2s_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai);
> +
> + switch (slot_width) {
> + case SLOT_WIDTH_8:
> + slot_len = 8;
> + break;
> + case SLOT_WIDTH_16:
> + slot_len = 16;
> + break;
> + case SLOT_WIDTH_24:
> + slot_len = 24;
> + break;
> + case SLOT_WIDTH_32:
> + slot_len = 0;
That looks suspicious or a comment would help.
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + val = rv_readl(adata->acp3x_base + mmACP_BTTDM_ITER);
> + rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_ITER);
> + val = rv_readl(adata->acp3x_base + mmACP_BTTDM_IRER);
> + rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_IRER);
> +
> + val = (FRM_LEN | (slots << 15) | (slot_len << 18));
> + rv_writel(val, adata->acp3x_base + mmACP_BTTDM_TXFRMT);
> + rv_writel(val, adata->acp3x_base + mmACP_BTTDM_RXFRMT);
> +
> + adata->tdm_fmt = val;
> + return 0;
> +}
> +
> +static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream,
> + struct snd_pcm_hw_params *params,
> + struct snd_soc_dai *dai)
> +{
> + u32 val = 0;
> + struct i2s_stream_instance *rtd = substream->runtime->private_data;
> +
> + switch (params_format(params)) {
> + case SNDRV_PCM_FORMAT_U8:
> + case SNDRV_PCM_FORMAT_S8:
> + rtd->xfer_resolution = 0x0;
> + break;
> + 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:
> + return -EINVAL;
> + }
> + val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER);
> + val = val | (rtd->xfer_resolution << 3);
> + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
> + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER);
> + else
> + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER);
for the capture case, you didn't initially read from IRER, so you are
doing a read-modify-write for playback but write for capture.
maybe that's legit but a comment would help then.
> +
> + return 0;
> +}
> +
> +static int acp3x_i2s_trigger(struct snd_pcm_substream *substream,
> + int cmd, struct snd_soc_dai *dai)
> +{
> + int ret = 0;
> + struct i2s_stream_instance *rtd = substream->runtime->private_data;
> + u32 val, period_bytes;
> +
> + period_bytes = frames_to_bytes(substream->runtime,
> + substream->runtime->period_size);
> + switch (cmd) {
> + case SNDRV_PCM_TRIGGER_START:
> + case SNDRV_PCM_TRIGGER_RESUME:
> + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
> + rtd->bytescount = acp_get_byte_count(rtd,
> + substream->stream);
> + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> + rv_writel(period_bytes, rtd->acp3x_base +
> + mmACP_BT_TX_INTR_WATERMARK_SIZE);
> + val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER);
> + val = val | BIT(0);
> + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER);
> + } else {
> + rv_writel(period_bytes, rtd->acp3x_base +
> + mmACP_BT_RX_INTR_WATERMARK_SIZE);
> + val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER);
> + val = val | BIT(0);
> + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER);
and here you separated the reads for ITER and IRER, so my comment above
likely points to a mistake.
> + }
> + rv_writel(1, rtd->acp3x_base + mmACP_BTTDM_IER);
> + break;
> + case SNDRV_PCM_TRIGGER_STOP:
> + case SNDRV_PCM_TRIGGER_SUSPEND:
> + case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
> + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> + val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER);
> + val = val & ~BIT(0);
> + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER);
> + } else {
> + val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER);
> + val = val & ~BIT(0);
> + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER);
> + }
> + rv_writel(0, rtd->acp3x_base + mmACP_BTTDM_IER);
> + break;
> + default:
> + ret = -EINVAL;
> + break;
> + }
> +
> + return ret;
> +}
> +
> +static struct snd_soc_dai_ops acp3x_i2s_dai_ops = {
> + .hw_params = acp3x_i2s_hwparams,
> + .trigger = acp3x_i2s_trigger,
> + .set_fmt = acp3x_i2s_set_fmt,
> + .set_tdm_slot = acp3x_i2s_set_tdm_slot,
> +};
> +
> +static const struct snd_soc_component_driver acp3x_dai_component = {
> + .name = "acp3x-i2s",
> +};
> +
> +static struct snd_soc_dai_driver acp3x_i2s_dai = {
> + .playback = {
> + .rates = SNDRV_PCM_RATE_8000_96000,
> + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
> + SNDRV_PCM_FMTBIT_U8 |
> + SNDRV_PCM_FMTBIT_S24_LE |
> + SNDRV_PCM_FMTBIT_S32_LE,
> + .channels_min = 2,
> + .channels_max = 8,
> +
> + .rate_min = 8000,
> + .rate_max = 96000,
> + },
> + .capture = {
> + .rates = SNDRV_PCM_RATE_8000_48000,
> + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
> + SNDRV_PCM_FMTBIT_U8 |
> + SNDRV_PCM_FMTBIT_S24_LE |
> + SNDRV_PCM_FMTBIT_S32_LE,
> + .channels_min = 2,
> + .channels_max = 2,
> + .rate_min = 8000,
> + .rate_max = 48000,
> + },
> + .ops = &acp3x_i2s_dai_ops,
> +};
> +
> +
> +static int acp3x_dai_probe(struct platform_device *pdev)
> +{
> + int status;
> + struct resource *res;
> + struct i2s_dev_data *adata;
> +
> + if (!pdev->dev.platform_data) {
> + dev_err(&pdev->dev, "platform_data not retrieved\n");
> + return -ENODEV;
> + }
> +
> + adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data),
> + GFP_KERNEL);
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res) {
> + dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
> + return -ENODEV;
> + }
> +
> + adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
> + resource_size(res));
> + if (IS_ERR(adata->acp3x_base))
> + return PTR_ERR(adata->acp3x_base);
> +
> +
> +
extra lines, run checkpatch...
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