dcba52ace7
Non atomic operations need to be performed in the trigger callback
of the TDM interfaces. Those are BEs but what matters is the nonatomic
flag of the FE in the DPCM context. Just set nonatomic for everything so,
at least, what is done is clear.
Fixes: 7864a79f37
("ASoC: meson: add axg sound card support")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20240426152946.3078805-3-jbrunet@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
375 lines
9.5 KiB
C
375 lines
9.5 KiB
C
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
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//
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// Copyright (c) 2018 BayLibre, SAS.
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// Author: Jerome Brunet <jbrunet@baylibre.com>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <sound/soc.h>
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#include <sound/soc-dai.h>
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#include "axg-tdm.h"
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#include "meson-card.h"
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struct axg_dai_link_tdm_mask {
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u32 tx;
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u32 rx;
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};
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struct axg_dai_link_tdm_data {
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unsigned int mclk_fs;
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unsigned int slots;
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unsigned int slot_width;
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u32 *tx_mask;
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u32 *rx_mask;
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struct axg_dai_link_tdm_mask *codec_masks;
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};
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/*
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* Base params for the codec to codec links
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* Those will be over-written by the CPU side of the link
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*/
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static const struct snd_soc_pcm_stream codec_params = {
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.formats = SNDRV_PCM_FMTBIT_S24_LE,
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.rate_min = 5525,
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.rate_max = 192000,
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.channels_min = 1,
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.channels_max = 8,
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};
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static int axg_card_tdm_be_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
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struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
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struct axg_dai_link_tdm_data *be =
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(struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
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return meson_card_i2s_set_sysclk(substream, params, be->mclk_fs);
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}
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static const struct snd_soc_ops axg_card_tdm_be_ops = {
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.hw_params = axg_card_tdm_be_hw_params,
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};
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static int axg_card_tdm_dai_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
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struct axg_dai_link_tdm_data *be =
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(struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
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struct snd_soc_dai *codec_dai;
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int ret, i;
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for_each_rtd_codec_dais(rtd, i, codec_dai) {
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ret = snd_soc_dai_set_tdm_slot(codec_dai,
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be->codec_masks[i].tx,
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be->codec_masks[i].rx,
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be->slots, be->slot_width);
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if (ret && ret != -ENOTSUPP) {
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dev_err(codec_dai->dev,
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"setting tdm link slots failed\n");
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return ret;
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}
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}
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ret = axg_tdm_set_tdm_slots(snd_soc_rtd_to_cpu(rtd, 0), be->tx_mask, be->rx_mask,
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be->slots, be->slot_width);
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if (ret) {
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dev_err(snd_soc_rtd_to_cpu(rtd, 0)->dev, "setting tdm link slots failed\n");
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return ret;
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}
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return 0;
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}
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static int axg_card_tdm_dai_lb_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
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struct axg_dai_link_tdm_data *be =
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(struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
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int ret;
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/* The loopback rx_mask is the pad tx_mask */
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ret = axg_tdm_set_tdm_slots(snd_soc_rtd_to_cpu(rtd, 0), NULL, be->tx_mask,
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be->slots, be->slot_width);
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if (ret) {
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dev_err(snd_soc_rtd_to_cpu(rtd, 0)->dev, "setting tdm link slots failed\n");
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return ret;
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}
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return 0;
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}
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static int axg_card_add_tdm_loopback(struct snd_soc_card *card,
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int *index)
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{
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struct meson_card *priv = snd_soc_card_get_drvdata(card);
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struct snd_soc_dai_link *pad = &card->dai_link[*index];
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struct snd_soc_dai_link *lb;
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struct snd_soc_dai_link_component *dlc;
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int ret;
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/* extend links */
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ret = meson_card_reallocate_links(card, card->num_links + 1);
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if (ret)
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return ret;
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lb = &card->dai_link[*index + 1];
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lb->name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-lb", pad->name);
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if (!lb->name)
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return -ENOMEM;
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dlc = devm_kzalloc(card->dev, sizeof(*dlc), GFP_KERNEL);
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if (!dlc)
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return -ENOMEM;
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lb->cpus = dlc;
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lb->codecs = &snd_soc_dummy_dlc;
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lb->num_cpus = 1;
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lb->num_codecs = 1;
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lb->stream_name = lb->name;
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lb->cpus->of_node = pad->cpus->of_node;
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lb->cpus->dai_name = "TDM Loopback";
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lb->dpcm_capture = 1;
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lb->no_pcm = 1;
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lb->ops = &axg_card_tdm_be_ops;
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lb->init = axg_card_tdm_dai_lb_init;
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/* Provide the same link data to the loopback */
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priv->link_data[*index + 1] = priv->link_data[*index];
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/*
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* axg_card_clean_references() will iterate over this link,
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* make sure the node count is balanced
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*/
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of_node_get(lb->cpus->of_node);
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/* Let add_links continue where it should */
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*index += 1;
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return 0;
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}
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static int axg_card_parse_cpu_tdm_slots(struct snd_soc_card *card,
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struct snd_soc_dai_link *link,
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struct device_node *node,
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struct axg_dai_link_tdm_data *be)
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{
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char propname[32];
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u32 tx, rx;
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int i;
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be->tx_mask = devm_kcalloc(card->dev, AXG_TDM_NUM_LANES,
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sizeof(*be->tx_mask), GFP_KERNEL);
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be->rx_mask = devm_kcalloc(card->dev, AXG_TDM_NUM_LANES,
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sizeof(*be->rx_mask), GFP_KERNEL);
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if (!be->tx_mask || !be->rx_mask)
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return -ENOMEM;
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for (i = 0, tx = 0; i < AXG_TDM_NUM_LANES; i++) {
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snprintf(propname, 32, "dai-tdm-slot-tx-mask-%d", i);
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snd_soc_of_get_slot_mask(node, propname, &be->tx_mask[i]);
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tx = max(tx, be->tx_mask[i]);
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}
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/* Disable playback is the interface has no tx slots */
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if (!tx)
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link->dpcm_playback = 0;
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for (i = 0, rx = 0; i < AXG_TDM_NUM_LANES; i++) {
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snprintf(propname, 32, "dai-tdm-slot-rx-mask-%d", i);
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snd_soc_of_get_slot_mask(node, propname, &be->rx_mask[i]);
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rx = max(rx, be->rx_mask[i]);
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}
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/* Disable capture is the interface has no rx slots */
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if (!rx)
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link->dpcm_capture = 0;
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/* ... but the interface should at least have one of them */
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if (!tx && !rx) {
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dev_err(card->dev, "tdm link has no cpu slots\n");
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return -EINVAL;
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}
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of_property_read_u32(node, "dai-tdm-slot-num", &be->slots);
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if (!be->slots) {
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/*
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* If the slot number is not provided, set it such as it
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* accommodates the largest mask
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*/
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be->slots = fls(max(tx, rx));
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} else if (be->slots < fls(max(tx, rx)) || be->slots > 32) {
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/*
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* Error if the slots can't accommodate the largest mask or
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* if it is just too big
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*/
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dev_err(card->dev, "bad slot number\n");
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return -EINVAL;
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}
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of_property_read_u32(node, "dai-tdm-slot-width", &be->slot_width);
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return 0;
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}
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static int axg_card_parse_codecs_masks(struct snd_soc_card *card,
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struct snd_soc_dai_link *link,
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struct device_node *node,
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struct axg_dai_link_tdm_data *be)
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{
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struct axg_dai_link_tdm_mask *codec_mask;
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struct device_node *np;
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codec_mask = devm_kcalloc(card->dev, link->num_codecs,
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sizeof(*codec_mask), GFP_KERNEL);
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if (!codec_mask)
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return -ENOMEM;
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be->codec_masks = codec_mask;
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for_each_child_of_node(node, np) {
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snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask",
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&codec_mask->rx);
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snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask",
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&codec_mask->tx);
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codec_mask++;
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}
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return 0;
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}
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static int axg_card_parse_tdm(struct snd_soc_card *card,
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struct device_node *node,
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int *index)
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{
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struct meson_card *priv = snd_soc_card_get_drvdata(card);
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struct snd_soc_dai_link *link = &card->dai_link[*index];
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struct axg_dai_link_tdm_data *be;
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int ret;
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/* Allocate tdm link parameters */
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be = devm_kzalloc(card->dev, sizeof(*be), GFP_KERNEL);
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if (!be)
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return -ENOMEM;
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priv->link_data[*index] = be;
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/* Setup tdm link */
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link->ops = &axg_card_tdm_be_ops;
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link->init = axg_card_tdm_dai_init;
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link->dai_fmt = meson_card_parse_daifmt(node, link->cpus->of_node);
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of_property_read_u32(node, "mclk-fs", &be->mclk_fs);
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ret = axg_card_parse_cpu_tdm_slots(card, link, node, be);
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if (ret) {
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dev_err(card->dev, "error parsing tdm link slots\n");
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return ret;
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}
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ret = axg_card_parse_codecs_masks(card, link, node, be);
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if (ret)
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return ret;
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/* Add loopback if the pad dai has playback */
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if (link->dpcm_playback) {
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ret = axg_card_add_tdm_loopback(card, index);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int axg_card_cpu_is_capture_fe(struct device_node *np)
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{
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return of_device_is_compatible(np, DT_PREFIX "axg-toddr");
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}
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static int axg_card_cpu_is_playback_fe(struct device_node *np)
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{
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return of_device_is_compatible(np, DT_PREFIX "axg-frddr");
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}
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static int axg_card_cpu_is_tdm_iface(struct device_node *np)
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{
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return of_device_is_compatible(np, DT_PREFIX "axg-tdm-iface");
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}
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static int axg_card_cpu_is_codec(struct device_node *np)
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{
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return of_device_is_compatible(np, DT_PREFIX "g12a-tohdmitx") ||
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of_device_is_compatible(np, DT_PREFIX "g12a-toacodec");
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}
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static int axg_card_add_link(struct snd_soc_card *card, struct device_node *np,
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int *index)
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{
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struct snd_soc_dai_link *dai_link = &card->dai_link[*index];
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struct snd_soc_dai_link_component *cpu;
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int ret;
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cpu = devm_kzalloc(card->dev, sizeof(*cpu), GFP_KERNEL);
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if (!cpu)
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return -ENOMEM;
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dai_link->cpus = cpu;
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dai_link->num_cpus = 1;
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dai_link->nonatomic = true;
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ret = meson_card_parse_dai(card, np, dai_link->cpus);
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if (ret)
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return ret;
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if (axg_card_cpu_is_playback_fe(dai_link->cpus->of_node))
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return meson_card_set_fe_link(card, dai_link, np, true);
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else if (axg_card_cpu_is_capture_fe(dai_link->cpus->of_node))
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return meson_card_set_fe_link(card, dai_link, np, false);
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ret = meson_card_set_be_link(card, dai_link, np);
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if (ret)
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return ret;
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if (axg_card_cpu_is_codec(dai_link->cpus->of_node)) {
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dai_link->c2c_params = &codec_params;
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dai_link->num_c2c_params = 1;
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} else {
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dai_link->no_pcm = 1;
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snd_soc_dai_link_set_capabilities(dai_link);
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if (axg_card_cpu_is_tdm_iface(dai_link->cpus->of_node))
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ret = axg_card_parse_tdm(card, np, index);
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}
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return ret;
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}
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static const struct meson_card_match_data axg_card_match_data = {
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.add_link = axg_card_add_link,
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};
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static const struct of_device_id axg_card_of_match[] = {
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{
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.compatible = "amlogic,axg-sound-card",
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.data = &axg_card_match_data,
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}, {}
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};
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MODULE_DEVICE_TABLE(of, axg_card_of_match);
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static struct platform_driver axg_card_pdrv = {
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.probe = meson_card_probe,
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.remove_new = meson_card_remove,
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.driver = {
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.name = "axg-sound-card",
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.of_match_table = axg_card_of_match,
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},
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};
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module_platform_driver(axg_card_pdrv);
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MODULE_DESCRIPTION("Amlogic AXG ALSA machine driver");
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MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
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MODULE_LICENSE("GPL v2");
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