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Message-ID: <77e35f54-323e-42d0-9e74-be984eebc0fe@linux.intel.com>
Date: Wed, 11 Jan 2023 09:34:56 -0600
From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To: Vijendar Mukunda <Vijendar.Mukunda@....com>, broonie@...nel.org,
vkoul@...nel.org, alsa-devel@...a-project.org
Cc: Mastan.Katragadda@....com, Sunil-kumar.Dommati@....com,
open list <linux-kernel@...r.kernel.org>,
Basavaraj.Hiregoudar@....com, Takashi Iwai <tiwai@...e.com>,
Liam Girdwood <lgirdwood@...il.com>, Mario.Limonciello@....com,
arungopal.kondaveeti@....com,
Syed Saba Kareem <Syed.SabaKareem@....com>
Subject: Re: [PATCH 08/19] ASoC: amd: ps: add soundwire dma driver dma ops
On 1/11/23 03:02, Vijendar Mukunda wrote:
> Add Soundwire DMA driver dma ops for Pink Sardine platform.
>
> Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
> ---
> sound/soc/amd/ps/acp63.h | 61 ++++
> sound/soc/amd/ps/ps-sdw-dma.c | 531 ++++++++++++++++++++++++++++++++++
> 2 files changed, 592 insertions(+)
>
> diff --git a/sound/soc/amd/ps/acp63.h b/sound/soc/amd/ps/acp63.h
> index b462320fdf2a..8963cfb6120d 100644
> --- a/sound/soc/amd/ps/acp63.h
> +++ b/sound/soc/amd/ps/acp63.h
> @@ -67,6 +67,38 @@
> #define ACP_SDW0_IRQ_MASK 21
> #define ACP_SDW1_IRQ_MASK 2
> #define ACP_ERROR_IRQ_MASK 29
> +#define ACP_AUDIO_TX_THRESHOLD 28
> +#define ACP_BT_TX_THRESHOLD 26
> +#define ACP_HS_TX_THRESHOLD 24
> +#define ACP_AUDIO_RX_THRESHOLD 27
> +#define ACP_BT_RX_THRESHOLD 25
> +#define ACP_HS_RX_THRESHOLD 23
> +#define ACP_P1_BT_TX_THRESHOLD 6
> +#define ACP_P1_BT_RX_THRESHOLD 5
> +#define ACP_SDW_DMA_IRQ_MASK 0x1F800000
> +#define ACP_P1_SDW_DMA_IRQ_MASK 0x60
> +#define ACP63_SDW_MAX_STREAMS 8
> +
> +#define ACP_DELAY_US 5
> +#define SDW_MEM_WINDOW_START 0x4800000
> +#define ACP_SDW_SRAM_PTE_OFFSET 0x03800400
> +#define SDW_PTE_OFFSET 0x400
> +#define SDW_FIFO_SIZE 0x100
> +#define SDW_DMA_SIZE 0x40
> +#define ACP_SDW_FIFO_OFFSET 0x100
> +#define ACP_SDW_RING_BUFF_ADDR_OFFSET (128 * 1024)
> +
> +#define SDW_PLAYBACK_MIN_NUM_PERIODS 2
> +#define SDW_PLAYBACK_MAX_NUM_PERIODS 8
> +#define SDW_PLAYBACK_MAX_PERIOD_SIZE 8192
> +#define SDW_PLAYBACK_MIN_PERIOD_SIZE 1024
> +#define SDW_CAPTURE_MIN_NUM_PERIODS 2
> +#define SDW_CAPTURE_MAX_NUM_PERIODS 8
> +#define SDW_CAPTURE_MAX_PERIOD_SIZE 8192
> +#define SDW_CAPTURE_MIN_PERIOD_SIZE 1024
> +
> +#define SDW_MAX_BUFFER (SDW_PLAYBACK_MAX_PERIOD_SIZE * SDW_PLAYBACK_MAX_NUM_PERIODS)
> +#define SDW_MIN_BUFFER SDW_MAX_BUFFER
>
> enum acp_config {
> ACP_CONFIG_0 = 0,
> @@ -93,6 +125,17 @@ enum acp_pdev_mask {
> ACP63_SDW_PDM_DEV_MASK,
> };
>
> +enum channel_type {
> + ACP_SDW_AUDIO_TX = 0,
> + ACP_SDW_BT_TX,
> + ACP_SDW_HS_TX,
> + ACP_SDW_AUDIO_RX,
> + ACP_SDW_BT_RX,
> + ACP_SDW_HS_RX,
> + ACP_SDW1_BT_TX,
> + ACP_SDW1_BT_RX,
> +};
this was defined in another patch already?
> +
> struct pdm_stream_instance {
> u16 num_pages;
> u16 channels;
> @@ -139,4 +182,22 @@ struct acp63_dev_data {
> struct sdw_dma_dev_data {
> void __iomem *acp_base;
> struct mutex *acp_lock;
> + struct snd_pcm_substream *sdw_stream[ACP63_SDW_MAX_STREAMS];
> +};
> +
> +struct sdw_stream_instance {
sdw_stream is already a well-defined concept. Please use sdw_dma_stream
or something less confusing naming-wise.
> + u16 num_pages;
> + u16 channels;
> + u32 stream_id;
> + dma_addr_t dma_addr;
> + u64 bytescount;
> + void __iomem *acp_base;
> +};
> +
> +union acp_sdw_dma_count {
> + struct {
> + u32 low;
> + u32 high;
> + } bcount;
> + u64 bytescount;
> };
> diff --git a/sound/soc/amd/ps/ps-sdw-dma.c b/sound/soc/amd/ps/ps-sdw-dma.c
> index 388a4b7df715..e94f76053c66 100644
> --- a/sound/soc/amd/ps/ps-sdw-dma.c
> +++ b/sound/soc/amd/ps/ps-sdw-dma.c
> @@ -12,12 +12,543 @@
> #include <sound/pcm_params.h>
> #include <sound/soc.h>
> #include <sound/soc-dai.h>
> +#include <linux/soundwire/sdw_amd.h>
> #include "acp63.h"
>
> #define DRV_NAME "amd_ps_sdw_dma"
>
> +static const struct snd_pcm_hardware acp63_sdw_hardware_playback = {
> + .info = SNDRV_PCM_INFO_INTERLEAVED |
> + SNDRV_PCM_INFO_BLOCK_TRANSFER |
> + SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
> + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
> + .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,
> + .rates = SNDRV_PCM_RATE_48000,
> + .rate_min = 48000,
> + .rate_max = 48000,
is this really limited to 2ch 48kHz? This doesn't align with the
references to Bluetooth above?
> + .buffer_bytes_max = SDW_PLAYBACK_MAX_NUM_PERIODS * SDW_PLAYBACK_MAX_PERIOD_SIZE,
> + .period_bytes_min = SDW_PLAYBACK_MIN_PERIOD_SIZE,
> + .period_bytes_max = SDW_PLAYBACK_MAX_PERIOD_SIZE,
> + .periods_min = SDW_PLAYBACK_MIN_NUM_PERIODS,
> + .periods_max = SDW_PLAYBACK_MAX_NUM_PERIODS,
> +};
> +
> +static const struct snd_pcm_hardware acp63_sdw_hardware_capture = {
> + .info = SNDRV_PCM_INFO_INTERLEAVED |
> + SNDRV_PCM_INFO_BLOCK_TRANSFER |
> + SNDRV_PCM_INFO_MMAP |
> + SNDRV_PCM_INFO_MMAP_VALID |
> + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
> + .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,
> + .rates = SNDRV_PCM_RATE_48000,
> + .rate_min = 48000,
> + .rate_max = 48000,
same here?
> + .buffer_bytes_max = SDW_CAPTURE_MAX_NUM_PERIODS * SDW_CAPTURE_MAX_PERIOD_SIZE,
> + .period_bytes_min = SDW_CAPTURE_MIN_PERIOD_SIZE,
> + .period_bytes_max = SDW_CAPTURE_MAX_PERIOD_SIZE,
> + .periods_min = SDW_CAPTURE_MIN_NUM_PERIODS,
> + .periods_max = SDW_CAPTURE_MAX_NUM_PERIODS,
> +};
> +
> +static void acp63_config_dma(struct sdw_stream_instance *sdw_ins, u32 stream_id)
> +{
> + u16 page_idx;
> + u32 low, high, val;
> + dma_addr_t addr;
> +
> + addr = sdw_ins->dma_addr;
> + val = SDW_PTE_OFFSET + (stream_id * 256);
> +
> + /* Group Enable */
> + acp63_writel(ACP_SDW_SRAM_PTE_OFFSET | BIT(31), sdw_ins->acp_base +
> + ACPAXI2AXI_ATU_BASE_ADDR_GRP_2);
> + acp63_writel(PAGE_SIZE_4K_ENABLE, sdw_ins->acp_base +
> + ACPAXI2AXI_ATU_PAGE_SIZE_GRP_2);
> + for (page_idx = 0; page_idx < sdw_ins->num_pages; page_idx++) {
> + /* Load the low address of page int ACP SRAM through SRBM */
> + low = lower_32_bits(addr);
> + high = upper_32_bits(addr);
> +
> + acp63_writel(low, sdw_ins->acp_base + ACP_SCRATCH_REG_0 + val);
> + high |= BIT(31);
> + acp63_writel(high, sdw_ins->acp_base + ACP_SCRATCH_REG_0 + val + 4);
> + val += 8;
> + addr += PAGE_SIZE;
> + }
> +
> + /*cache Invalidation added for Testing */
/* cache
> + acp63_writel(0x1, sdw_ins->acp_base + ACPAXI2AXI_ATU_CTRL);
> +}
> +static int acp63_sdw_dma_hw_params(struct snd_soc_component *component,
> + struct snd_pcm_substream *substream,
> + struct snd_pcm_hw_params *params)
> +{
> + struct sdw_stream_instance *sdw_stream_data;
> + struct sdw_dma_dev_data *sdw_data;
> + u32 period_bytes;
> + u32 water_mark_size_reg;
> + u32 irq_mask, ext_intr_ctrl;
> + u64 size;
> + u32 stream_id;
> + u32 acp_ext_intr_cntl_reg;
> + int ret;
> +
> + stream_id = 0;
useless initialization...
> + sdw_data = dev_get_drvdata(component->dev);
> + sdw_stream_data = substream->runtime->private_data;
> + if (!sdw_stream_data)
> + return -EINVAL;
> + stream_id = sdw_stream_data->stream_id;
... overriden here
> + sdw_data->sdw_stream[stream_id] = substream;
> + size = params_buffer_bytes(params);
> + period_bytes = params_period_bytes(params);
> + sdw_stream_data->dma_addr = substream->runtime->dma_addr;
> + sdw_stream_data->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
> + acp63_config_dma(sdw_stream_data, stream_id);
> + ret = acp63_configure_sdw_ringbuffer(sdw_stream_data->acp_base, stream_id, size);
> + if (ret) {
> + dev_err(component->dev, "Invalid channel type\n");
> + return -EINVAL;
> + }
> + switch (stream_id) {
> + case ACP_SDW_AUDIO_TX:
> + water_mark_size_reg = ACP_AUDIO_TX_INTR_WATERMARK_SIZE;
> + irq_mask = BIT(ACP_AUDIO_TX_THRESHOLD);
> + acp_ext_intr_cntl_reg = ACP_EXTERNAL_INTR_CNTL;
> + break;
so there's ONE resource to deal with external codecs? How does this work
if you have a headset codec and an amplifier?
> + case ACP_SDW_BT_TX:
> + water_mark_size_reg = ACP_BT_TX_INTR_WATERMARK_SIZE;
> + irq_mask = BIT(ACP_BT_TX_THRESHOLD);
> + acp_ext_intr_cntl_reg = ACP_EXTERNAL_INTR_CNTL;
> + break;
> + case ACP_SDW_HS_TX:
> + water_mark_size_reg = ACP_HS_TX_INTR_WATERMARK_SIZE;
> + irq_mask = BIT(ACP_HS_TX_THRESHOLD);
> + acp_ext_intr_cntl_reg = ACP_EXTERNAL_INTR_CNTL;
> + break;
> + case ACP_SDW1_BT_TX:
> + water_mark_size_reg = ACP_P1_BT_TX_INTR_WATERMARK_SIZE;
> + irq_mask = BIT(ACP_P1_BT_TX_THRESHOLD);
> + acp_ext_intr_cntl_reg = ACP_EXTERNAL_INTR_CNTL1;
> + break;
> + case ACP_SDW_AUDIO_RX:
> + water_mark_size_reg = ACP_AUDIO_RX_INTR_WATERMARK_SIZE;
> + irq_mask = BIT(ACP_AUDIO_RX_THRESHOLD);
> + acp_ext_intr_cntl_reg = ACP_EXTERNAL_INTR_CNTL;
> + break;
> + case ACP_SDW_BT_RX:
> + water_mark_size_reg = ACP_BT_RX_INTR_WATERMARK_SIZE;
> + irq_mask = BIT(ACP_BT_RX_THRESHOLD);
> + acp_ext_intr_cntl_reg = ACP_EXTERNAL_INTR_CNTL;
> + break;
> + case ACP_SDW_HS_RX:
> + water_mark_size_reg = ACP_HS_RX_INTR_WATERMARK_SIZE;
> + irq_mask = BIT(ACP_HS_RX_THRESHOLD);
> + acp_ext_intr_cntl_reg = ACP_EXTERNAL_INTR_CNTL;
> + break;
> + case ACP_SDW1_BT_RX:
> + water_mark_size_reg = ACP_P1_BT_RX_INTR_WATERMARK_SIZE;
> + irq_mask = BIT(ACP_P1_BT_RX_THRESHOLD);
> + acp_ext_intr_cntl_reg = ACP_EXTERNAL_INTR_CNTL1;
> + break;
> + default:
> + dev_err(component->dev, "%s: Invalid channel type\n", __func__);
> + return -EINVAL;
> + }
> +
> + ext_intr_ctrl = acp63_readl(sdw_stream_data->acp_base + acp_ext_intr_cntl_reg);
> + ext_intr_ctrl |= irq_mask;
> + acp63_writel(ext_intr_ctrl, sdw_stream_data->acp_base + acp_ext_intr_cntl_reg);
> + acp63_writel(period_bytes, sdw_stream_data->acp_base + water_mark_size_reg);
> + return 0;
> +}
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