diff options
Diffstat (limited to 'sound/soc/codecs/pcm3168a.c')
| -rw-r--r-- | sound/soc/codecs/pcm3168a.c | 96 |
1 files changed, 77 insertions, 19 deletions
diff --git a/sound/soc/codecs/pcm3168a.c b/sound/soc/codecs/pcm3168a.c index e0d5839fe1a7..f1104d7d6426 100644 --- a/sound/soc/codecs/pcm3168a.c +++ b/sound/soc/codecs/pcm3168a.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * PCM3168A codec driver * * Copyright (C) 2015 Imagination Technologies Ltd. * * Author: Damien Horsley <Damien.Horsley@imgtec.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. */ #include <linux/clk.h> @@ -56,6 +53,9 @@ struct pcm3168a_priv { unsigned long sysclk; unsigned int adc_fmt; unsigned int dac_fmt; + int tdm_slots; + u32 tdm_mask[2]; + int slot_width; }; static const char *const pcm3168a_roll_off[] = { "Sharp", "Slow" }; @@ -387,6 +387,47 @@ static int pcm3168a_set_dai_fmt_adc(struct snd_soc_dai *dai, return pcm3168a_set_dai_fmt(dai, format, false); } +static int pcm3168a_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, + unsigned int rx_mask, int slots, + int slot_width) +{ + struct snd_soc_component *component = dai->component; + struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component); + + if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) { + dev_err(component->dev, + "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n", + tx_mask, rx_mask, slots); + return -EINVAL; + } + + if (slot_width && + (slot_width != 16 && slot_width != 24 && slot_width != 32 )) { + dev_err(component->dev, "Unsupported slot_width %d\n", + slot_width); + return -EINVAL; + } + + if (pcm3168a->tdm_slots && pcm3168a->tdm_slots != slots) { + dev_err(component->dev, "Not matching slots %d vs %d\n", + pcm3168a->tdm_slots, slots); + return -EINVAL; + } + + if (pcm3168a->slot_width && pcm3168a->slot_width != slot_width) { + dev_err(component->dev, "Not matching slot_width %d vs %d\n", + pcm3168a->slot_width, slot_width); + return -EINVAL; + } + + pcm3168a->tdm_slots = slots; + pcm3168a->slot_width = slot_width; + pcm3168a->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask; + pcm3168a->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = rx_mask; + + return 0; +} + static int pcm3168a_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) @@ -396,11 +437,10 @@ static int pcm3168a_hw_params(struct snd_pcm_substream *substream, bool tx, master_mode; u32 val, mask, shift, reg; unsigned int rate, fmt, ratio, max_ratio; - unsigned int chan; - int i, min_frame_size; + unsigned int tdm_slots; + int i, slot_width; rate = params_rate(params); - chan = params_channels(params); ratio = pcm3168a->sysclk / rate; @@ -431,30 +471,46 @@ static int pcm3168a_hw_params(struct snd_pcm_substream *substream, return -EINVAL; } - min_frame_size = params_width(params) * 2; - switch (min_frame_size) { - case 32: + if (pcm3168a->slot_width) + slot_width = pcm3168a->slot_width; + else + slot_width = params_width(params); + + switch (slot_width) { + case 16: if (master_mode || (fmt != PCM3168A_FMT_RIGHT_J)) { - dev_err(component->dev, "32-bit frames are supported only for slave mode using right justified\n"); + dev_err(component->dev, "16-bit slots are supported only for slave mode using right justified\n"); return -EINVAL; } fmt = PCM3168A_FMT_RIGHT_J_16; break; - case 48: + case 24: if (master_mode || (fmt & PCM3168A_FMT_DSP_MASK)) { - dev_err(component->dev, "48-bit frames not supported in master mode, or slave mode using DSP\n"); + dev_err(component->dev, "24-bit slots not supported in master mode, or slave mode using DSP\n"); return -EINVAL; } break; - case 64: + case 32: break; default: - dev_err(component->dev, "unsupported frame size: %d\n", min_frame_size); + dev_err(component->dev, "unsupported frame size: %d\n", slot_width); return -EINVAL; } - /* for TDM */ - if (chan > 2) { + if (pcm3168a->tdm_slots) + tdm_slots = pcm3168a->tdm_slots; + else + tdm_slots = params_channels(params); + + /* + * Switch the codec to TDM mode when more than 2 TDM slots are needed + * for the stream. + * If pcm3168a->tdm_slots is not set or set to more than 2 (8/6 usually) + * then DIN1/DOUT1 is used in TDM mode. + * If pcm3168a->tdm_slots is set to 2 then DIN1/2/3/4 and DOUT1/2/3 is + * used in normal mode, no need to switch to TDM modes. + */ + if (tdm_slots > 2) { switch (fmt) { case PCM3168A_FMT_I2S: case PCM3168A_FMT_DSP_A: @@ -554,14 +610,16 @@ static const struct snd_soc_dai_ops pcm3168a_dac_dai_ops = { .set_fmt = pcm3168a_set_dai_fmt_dac, .set_sysclk = pcm3168a_set_dai_sysclk, .hw_params = pcm3168a_hw_params, - .digital_mute = pcm3168a_digital_mute + .digital_mute = pcm3168a_digital_mute, + .set_tdm_slot = pcm3168a_set_tdm_slot, }; static const struct snd_soc_dai_ops pcm3168a_adc_dai_ops = { .startup = pcm3168a_startup, .set_fmt = pcm3168a_set_dai_fmt_adc, .set_sysclk = pcm3168a_set_dai_sysclk, - .hw_params = pcm3168a_hw_params + .hw_params = pcm3168a_hw_params, + .set_tdm_slot = pcm3168a_set_tdm_slot, }; static struct snd_soc_dai_driver pcm3168a_dais[] = { |