ASoC: SOF: Intel: add SKL+ platform DAIs

Add declarations for DAIs and utilities for link DMA management

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sof/intel/hda-dai.c b/sound/soc/sof/intel/hda-dai.c
new file mode 100644 (file)
index 0000000..830328a
--- /dev/null
+++ b/sound/soc/sof/intel/hda-dai.c
@@ -0,0 +1,351 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license.  When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2018 Intel Corporation. All rights reserved.
+//
+// Authors: Keyon Jie <yang.jie@linux.intel.com>
+//
+
+#include <sound/pcm_params.h>
+#include <sound/hdaudio_ext.h>
+#include "../sof-priv.h"
+#include "hda.h"
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
+
+struct hda_pipe_params {
+       u8 host_dma_id;
+       u8 link_dma_id;
+       u32 ch;
+       u32 s_freq;
+       u32 s_fmt;
+       u8 linktype;
+       snd_pcm_format_t format;
+       int link_index;
+       int stream;
+       unsigned int host_bps;
+       unsigned int link_bps;
+};
+
+/*
+ * Unlike GP dma, there is a set of stream registers in hda controller
+ * to control the link dma channels. Each register controls one link
+ * dma channel and the relation is fixed. To make sure FW uses correct
+ * link dma channels, host allocates stream registers and sends the
+ * corresponding link dma channels to FW to allocate link dma channel
+ *
+ * FIXME: this API is abused in the sense that tx_num and rx_num are
+ * passed as arguments, not returned. We need to find a better way to
+ * retrieve the stream tag allocated for the link DMA
+ */
+static int hda_link_dma_get_channels(struct snd_soc_dai *dai,
+                                    unsigned int *tx_num,
+                                    unsigned int *tx_slot,
+                                    unsigned int *rx_num,
+                                    unsigned int *rx_slot)
+{
+       struct hdac_bus *bus;
+       struct hdac_ext_stream *stream;
+       struct snd_pcm_substream substream;
+       struct snd_sof_dev *sdev =
+               snd_soc_component_get_drvdata(dai->component);
+
+       bus = sof_to_bus(sdev);
+
+       memset(&substream, 0, sizeof(substream));
+       if (*tx_num == 1) {
+               substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
+               stream = snd_hdac_ext_stream_assign(bus, &substream,
+                                                   HDAC_EXT_STREAM_TYPE_LINK);
+               if (!stream) {
+                       dev_err(bus->dev, "error: failed to find a free hda ext stream for playback");
+                       return -EBUSY;
+               }
+
+               snd_soc_dai_set_dma_data(dai, &substream, stream);
+               *tx_slot = hdac_stream(stream)->stream_tag - 1;
+
+               dev_dbg(bus->dev, "link dma channel %d for playback", *tx_slot);
+       }
+
+       if (*rx_num == 1) {
+               substream.stream = SNDRV_PCM_STREAM_CAPTURE;
+               stream = snd_hdac_ext_stream_assign(bus, &substream,
+                                                   HDAC_EXT_STREAM_TYPE_LINK);
+               if (!stream) {
+                       dev_err(bus->dev, "error: failed to find a free hda ext stream for capture");
+                       return -EBUSY;
+               }
+
+               snd_soc_dai_set_dma_data(dai, &substream, stream);
+               *rx_slot = hdac_stream(stream)->stream_tag - 1;
+
+               dev_dbg(bus->dev, "link dma channel %d for capture", *rx_slot);
+       }
+
+       return 0;
+}
+
+static int hda_link_dma_params(struct hdac_ext_stream *stream,
+                              struct hda_pipe_params *params)
+{
+       struct hdac_stream *hstream = &stream->hstream;
+       unsigned char stream_tag = hstream->stream_tag;
+       struct hdac_bus *bus = hstream->bus;
+       struct hdac_ext_link *link;
+       unsigned int format_val;
+
+       snd_hdac_ext_stream_decouple(bus, stream, true);
+       snd_hdac_ext_link_stream_reset(stream);
+
+       format_val = snd_hdac_calc_stream_format(params->s_freq, params->ch,
+                                                params->format,
+                                                params->link_bps, 0);
+
+       dev_dbg(bus->dev, "format_val=%d, rate=%d, ch=%d, format=%d\n",
+               format_val, params->s_freq, params->ch, params->format);
+
+       snd_hdac_ext_link_stream_setup(stream, format_val);
+
+       if (stream->hstream.direction == SNDRV_PCM_STREAM_PLAYBACK) {
+               list_for_each_entry(link, &bus->hlink_list, list) {
+                       if (link->index == params->link_index)
+                               snd_hdac_ext_link_set_stream_id(link,
+                                                               stream_tag);
+               }
+       }
+
+       stream->link_prepared = 1;
+
+       return 0;
+}
+
+static int hda_link_hw_params(struct snd_pcm_substream *substream,
+                             struct snd_pcm_hw_params *params,
+                             struct snd_soc_dai *dai)
+{
+       struct hdac_stream *hstream = substream->runtime->private_data;
+       struct hdac_bus *bus = hstream->bus;
+       struct hdac_ext_stream *link_dev;
+       struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
+       struct snd_soc_dai *codec_dai = rtd->codec_dai;
+       struct hda_pipe_params p_params = {0};
+       struct hdac_ext_link *link;
+       int stream_tag;
+
+       link_dev = snd_soc_dai_get_dma_data(dai, substream);
+
+       link = snd_hdac_ext_bus_get_link(bus, codec_dai->component->name);
+       if (!link)
+               return -EINVAL;
+
+       stream_tag = hdac_stream(link_dev)->stream_tag;
+
+       /* set the stream tag in the codec dai dma params  */
+       if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+               snd_soc_dai_set_tdm_slot(codec_dai, stream_tag, 0, 0, 0);
+       else
+               snd_soc_dai_set_tdm_slot(codec_dai, 0, stream_tag, 0, 0);
+
+       p_params.s_fmt = snd_pcm_format_width(params_format(params));
+       p_params.ch = params_channels(params);
+       p_params.s_freq = params_rate(params);
+       p_params.stream = substream->stream;
+       p_params.link_dma_id = stream_tag - 1;
+       p_params.link_index = link->index;
+       p_params.format = params_format(params);
+
+       if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+               p_params.link_bps = codec_dai->driver->playback.sig_bits;
+       else
+               p_params.link_bps = codec_dai->driver->capture.sig_bits;
+
+       return hda_link_dma_params(link_dev, &p_params);
+}
+
+static int hda_link_pcm_prepare(struct snd_pcm_substream *substream,
+                               struct snd_soc_dai *dai)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_sof_dev *sdev =
+               snd_soc_component_get_drvdata(dai->component);
+       struct snd_sof_pcm *spcm;
+       int stream = substream->stream;
+
+       spcm = snd_sof_find_spcm_dai(sdev, rtd);
+       if (!spcm)
+               return -EINVAL;
+
+       /* setup hw_params again only if resuming from system suspend */
+       if (!spcm->hw_params_upon_resume[stream])
+               return 0;
+
+       dev_dbg(sdev->dev, "hda: prepare stream %d dir %d\n",
+               spcm->pcm.pcm_id, substream->stream);
+
+       return hda_link_hw_params(substream, &rtd->dpcm[stream].hw_params,
+                                 dai);
+}
+
+static int hda_link_pcm_trigger(struct snd_pcm_substream *substream,
+                               int cmd, struct snd_soc_dai *dai)
+{
+       struct hdac_ext_stream *link_dev =
+                               snd_soc_dai_get_dma_data(dai, substream);
+       int ret;
+
+       dev_dbg(dai->dev, "In %s cmd=%d\n", __func__, cmd);
+       switch (cmd) {
+       case SNDRV_PCM_TRIGGER_RESUME:
+               /* set up hw_params */
+               ret = hda_link_pcm_prepare(substream, dai);
+               if (ret < 0) {
+                       dev_err(dai->dev,
+                               "error: setting up hw_params during resume\n");
+                       return ret;
+               }
+
+               /* fallthrough */
+       case SNDRV_PCM_TRIGGER_START:
+       case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+               snd_hdac_ext_link_stream_start(link_dev);
+               break;
+       case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+       case SNDRV_PCM_TRIGGER_SUSPEND:
+       case SNDRV_PCM_TRIGGER_STOP:
+               snd_hdac_ext_link_stream_clear(link_dev);
+               break;
+       default:
+               return -EINVAL;
+       }
+       return 0;
+}
+
+/*
+ * FIXME: This API is also abused since it's used for two purposes.
+ * when the substream argument is NULL this function is used for cleanups
+ * that aren't necessarily required, and called explicitly by handling
+ * ASoC core structures, which is not recommended.
+ * This part will be reworked in follow-up patches.
+ */
+static int hda_link_hw_free(struct snd_pcm_substream *substream,
+                           struct snd_soc_dai *dai)
+{
+       const char *name;
+       unsigned int stream_tag;
+       struct hdac_bus *bus;
+       struct hdac_ext_link *link;
+       struct hdac_stream *hstream;
+       struct hdac_ext_stream *stream;
+       struct snd_soc_pcm_runtime *rtd;
+       struct hdac_ext_stream *link_dev;
+       struct snd_pcm_substream pcm_substream;
+
+       memset(&pcm_substream, 0, sizeof(pcm_substream));
+       if (substream) {
+               hstream = substream->runtime->private_data;
+               bus = hstream->bus;
+               rtd = snd_pcm_substream_chip(substream);
+               link_dev = snd_soc_dai_get_dma_data(dai, substream);
+               snd_hdac_ext_stream_decouple(bus, link_dev, false);
+               name = rtd->codec_dai->component->name;
+               link = snd_hdac_ext_bus_get_link(bus, name);
+               if (!link)
+                       return -EINVAL;
+
+               if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+                       stream_tag = hdac_stream(link_dev)->stream_tag;
+                       snd_hdac_ext_link_clear_stream_id(link, stream_tag);
+               }
+
+               link_dev->link_prepared = 0;
+       } else {
+               /* release all hda streams when dai link is unloaded */
+               pcm_substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
+               stream = snd_soc_dai_get_dma_data(dai, &pcm_substream);
+               if (stream) {
+                       snd_soc_dai_set_dma_data(dai, &pcm_substream, NULL);
+                       snd_hdac_ext_stream_release(stream,
+                                                   HDAC_EXT_STREAM_TYPE_LINK);
+               }
+
+               pcm_substream.stream = SNDRV_PCM_STREAM_CAPTURE;
+               stream = snd_soc_dai_get_dma_data(dai, &pcm_substream);
+               if (stream) {
+                       snd_soc_dai_set_dma_data(dai, &pcm_substream, NULL);
+                       snd_hdac_ext_stream_release(stream,
+                                                   HDAC_EXT_STREAM_TYPE_LINK);
+               }
+       }
+
+       return 0;
+}
+
+static const struct snd_soc_dai_ops hda_link_dai_ops = {
+       .hw_params = hda_link_hw_params,
+       .hw_free = hda_link_hw_free,
+       .trigger = hda_link_pcm_trigger,
+       .prepare = hda_link_pcm_prepare,
+       .get_channel_map = hda_link_dma_get_channels,
+};
+#endif
+
+/*
+ * common dai driver for skl+ platforms.
+ * some products who use this DAI array only physically have a subset of
+ * the DAIs, but no harm is done here by adding the whole set.
+ */
+struct snd_soc_dai_driver skl_dai[] = {
+{
+       .name = "SSP0 Pin",
+},
+{
+       .name = "SSP1 Pin",
+},
+{
+       .name = "SSP2 Pin",
+},
+{
+       .name = "SSP3 Pin",
+},
+{
+       .name = "SSP4 Pin",
+},
+{
+       .name = "SSP5 Pin",
+},
+{
+       .name = "DMIC01 Pin",
+},
+{
+       .name = "DMIC16k Pin",
+},
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
+{
+       .name = "iDisp1 Pin",
+       .ops = &hda_link_dai_ops,
+},
+{
+       .name = "iDisp2 Pin",
+       .ops = &hda_link_dai_ops,
+},
+{
+       .name = "iDisp3 Pin",
+       .ops = &hda_link_dai_ops,
+},
+{
+       .name = "Analog CPU DAI",
+       .ops = &hda_link_dai_ops,
+},
+{
+       .name = "Digital CPU DAI",
+       .ops = &hda_link_dai_ops,
+},
+{
+       .name = "Alt Analog CPU DAI",
+       .ops = &hda_link_dai_ops,
+},
+#endif
+};