Add implementation of alsa compress offload operations. At the moment we only support playback only.
Signed-off-by: Qais Yousef qais.yousef@imgtec.com Cc: Liam Girdwood lgirdwood@gmail.com Cc: Mark Brown broonie@kernel.org Cc: Jaroslav Kysela perex@perex.cz Cc: Takashi Iwai tiwai@suse.com Cc: linux-kernel@vger.kernel.org --- sound/soc/img/axd/axd_alsa_ops.c | 211 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 211 insertions(+) create mode 100644 sound/soc/img/axd/axd_alsa_ops.c
diff --git a/sound/soc/img/axd/axd_alsa_ops.c b/sound/soc/img/axd/axd_alsa_ops.c new file mode 100644 index 000000000000..91e17119b306 --- /dev/null +++ b/sound/soc/img/axd/axd_alsa_ops.c @@ -0,0 +1,211 @@ +/* + * Copyright (C) 2015 Imagination Technologies Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version + * 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * AXD ALSA Compressed ops + */ +#include <sound/compress_driver.h> +#include <sound/soc.h> + +#include "axd_cmds.h" +#include "axd_module.h" + +static struct axd_dev *get_axd_from_cstream(struct snd_compr_stream *cstream) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + return snd_soc_platform_get_drvdata(rtd->platform); +} + +static int copied_total; + +static int axd_compr_open(struct snd_compr_stream *cstream) +{ + struct axd_dev *axd = get_axd_from_cstream(cstream); + + axd_cmd_output_set_sink(&axd->cmd, 0, 1); + return axd_cmd_inpipe_start(&axd->cmd, 0); +} + +static int axd_compr_free(struct snd_compr_stream *cstream) +{ + struct axd_dev *axd = get_axd_from_cstream(cstream); + + axd_cmd_inpipe_stop(&axd->cmd, 0); + copied_total = 0; + + return 0; +} + +static int axd_compr_set_params(struct snd_compr_stream *cstream, + struct snd_compr_params *params) +{ + int ret; + struct axd_dev *axd = get_axd_from_cstream(cstream); + + ret = axd_cmd_input_set_decoder_params(&axd->cmd, 0, ¶ms->codec); + if (ret) + return -EINVAL; + return 0; +} + +static int axd_compr_get_params(struct snd_compr_stream *cstream, + struct snd_codec *params) +{ + int ret; + struct axd_dev *axd = get_axd_from_cstream(cstream); + + ret = axd_cmd_input_get_decoder_params(&axd->cmd, 0, params); + if (ret) + return -EIO; + return 0; +} + +static int axd_compr_trigger(struct snd_compr_stream *cstream, int cmd) +{ + struct axd_dev *axd = get_axd_from_cstream(cstream); + + if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN || + cmd == SND_COMPR_TRIGGER_DRAIN) { + /* stop to send EOS which will cause the stream to be drained */ + axd_cmd_inpipe_stop(&axd->cmd, 0); + + /* + * start again, repeating if EAGAIN is returned meaning we're + * being drained + */ + while (axd_cmd_inpipe_start(&axd->cmd, 0) == -EAGAIN) + cpu_relax(); + + copied_total = 0; + } + return 0; +} + +static int axd_compr_pointer(struct snd_compr_stream *cstream, + struct snd_compr_tstamp *tstamp) +{ + tstamp->copied_total = copied_total; + return 0; +} + +static int axd_compr_copy(struct snd_compr_stream *cstream, char __user *buf, + size_t count) +{ + struct axd_dev *axd = get_axd_from_cstream(cstream); + int ret; + + ret = axd_cmd_send_buffer(&axd->cmd, 0, buf, count); + if (ret < 0) { + dev_err(axd->dev, "failed to write buffer %d\n", ret); + return ret; + } + copied_total += ret; + + return ret; +} + +static int axd_compr_get_caps(struct snd_compr_stream *cstream, + struct snd_compr_caps *caps) +{ + struct axd_dev *axd = get_axd_from_cstream(cstream); + + caps->min_fragment_size = 1024*2; + caps->max_fragment_size = 1024*2; + caps->min_fragments= 1; + caps->max_fragments= 5; + + axd_cmd_get_decoders(&axd->cmd, caps); + + return 0; +} + +static int axd_compr_get_codec_caps(struct snd_compr_stream *cstream, + struct snd_compr_codec_caps *codec) +{ + switch (codec->codec) { + case SND_AUDIOCODEC_PCM: + codec->num_descriptors = 1; + codec->descriptor[0].max_ch = 2; + codec->descriptor[0].sample_rates[0] = 96000; + codec->descriptor[0].sample_rates[1] = 64000; + codec->descriptor[0].sample_rates[2] = 48000; + codec->descriptor[0].sample_rates[3] = 44100; + codec->descriptor[0].sample_rates[4] = 32000; + codec->descriptor[0].sample_rates[5] = 16000; + codec->descriptor[0].sample_rates[6] = 8000; + codec->descriptor[0].num_sample_rates = 7; + codec->descriptor[0].num_bitrates = 0; + codec->descriptor[0].profiles = 0; + codec->descriptor[0].modes = 0; + codec->descriptor[0].formats = 0; + break; + case SND_AUDIOCODEC_MP3: + codec->num_descriptors = 1; + codec->descriptor[0].max_ch = 2; + codec->descriptor[0].num_sample_rates = 0; + codec->descriptor[0].num_bitrates = 0; + codec->descriptor[0].profiles = 0; + codec->descriptor[0].modes = 0; + codec->descriptor[0].formats = 0; + break; + case SND_AUDIOCODEC_AAC: + codec->num_descriptors = 1; + codec->descriptor[0].max_ch = 6; + codec->descriptor[0].num_sample_rates = 0; + codec->descriptor[0].num_bitrates = 0; + codec->descriptor[0].profiles = 0; + codec->descriptor[0].modes = SND_AUDIOMODE_AAC_MAIN | + SND_AUDIOMODE_AAC_LC | SND_AUDIOMODE_AAC_SSR; + codec->descriptor[0].formats = SND_AUDIOSTREAMFORMAT_MP2ADTS | + SND_AUDIOSTREAMFORMAT_MP4ADTS | SND_AUDIOSTREAMFORMAT_ADIF | + SND_AUDIOSTREAMFORMAT_RAW; + break; + case SND_AUDIOCODEC_VORBIS: + codec->num_descriptors = 0; + break; + case SND_AUDIOCODEC_FLAC: + codec->num_descriptors = 1; + codec->descriptor[0].max_ch = 6; + codec->descriptor[0].num_sample_rates = 0; + codec->descriptor[0].num_bitrates = 0; + codec->descriptor[0].profiles = 0; + codec->descriptor[0].modes = 0; + codec->descriptor[0].formats = SND_AUDIOSTREAMFORMAT_FLAC; + break; + case SND_AUDIOCODEC_WMA: + codec->num_descriptors = 1; + codec->descriptor[0].max_ch = 6; + codec->descriptor[0].num_sample_rates = 0; + codec->descriptor[0].num_bitrates = 0; + codec->descriptor[0].profiles = SND_AUDIOPROFILE_WMA7 | + SND_AUDIOPROFILE_WMA8 | SND_AUDIOPROFILE_WMA9 | + SND_AUDIOPROFILE_WMA10; + codec->descriptor[0].modes = 0; + codec->descriptor[0].formats = SND_AUDIOSTREAMFORMAT_WMA_NOASF_HDR; + break; + default: + return -EINVAL; + } + + return 0; +} + +struct snd_compr_ops axd_compr_ops = { + .open = axd_compr_open, + .free = axd_compr_free, + .set_params = axd_compr_set_params, + .get_params = axd_compr_get_params, + .trigger = axd_compr_trigger, + .pointer = axd_compr_pointer, + .copy = axd_compr_copy, + .get_caps = axd_compr_get_caps, + .get_codec_caps = axd_compr_get_codec_caps +};