1 // SPDX-License-Identifier: GPL-2.0
3 // Renesas R-Car SRC support
26 	struct rsnd_kctrl_cfg_s sen;  /* sync convert enable */
27 	struct rsnd_kctrl_cfg_s sync; /* sync convert */
33 #define rsnd_src_get(priv, id) ((struct rsnd_src *)(priv->src) + id)
34 #define rsnd_src_nr(priv) ((priv)->src_nr)
35 #define rsnd_src_sync_is_enabled(mod) (rsnd_mod_to_src(mod)->sen.val)
43 	     ((pos) = (struct rsnd_src *)(priv)->src + i);	\
48  *		image of SRC (Sampling Rate Converter)
50  * 96kHz   <-> +-----+	48kHz	+-----+	 48kHz	+-------+
51  * 48kHz   <-> | SRC | <------>	| SSI |	<----->	| codec |
52  * 44.1kHz <-> +-----+		+-----+		+-------+
93 	convert_rate = src->sync.val;  in rsnd_src_convert_rate()
99 		convert_rate = runtime->rate;  in rsnd_src_convert_rate()
110 	unsigned int rate = 0;  in rsnd_src_get_rate()  local
115 	 * runtime_rate -> [SRC] -> convert_rate  in rsnd_src_get_rate()
118 	 * convert_rate -> [SRC] -> runtime_rate  in rsnd_src_get_rate()
122 		return runtime->rate;  in rsnd_src_get_rate()
125 	 * return convert rate if SRC is used,  in rsnd_src_get_rate()
126 	 * otherwise, return runtime->rate as usual  in rsnd_src_get_rate()
129 		rate = rsnd_src_convert_rate(io, src_mod);  in rsnd_src_get_rate()
131 	if (!rate)  in rsnd_src_get_rate()
132 		rate = runtime->rate;  in rsnd_src_get_rate()
134 	return rate;  in rsnd_src_get_rate()
138 	0x01800000, /* 6 - 1/6 */
139 	0x01000000, /* 6 - 1/4 */
140 	0x00c00000, /* 6 - 1/3 */
141 	0x00800000, /* 6 - 1/2 */
142 	0x00600000, /* 6 - 2/3 */
143 	0x00400000, /* 6 - 1   */
147 	0x02400000, /* 6 - 1/6 */
148 	0x01800000, /* 6 - 1/4 */
149 	0x01200000, /* 6 - 1/3 */
150 	0x00c00000, /* 6 - 1/2 */
151 	0x00900000, /* 6 - 2/3 */
152 	0x00600000, /* 6 - 1   */
156 	0x00100060, /* 6 - 1/6 */
157 	0x00100040, /* 6 - 1/4 */
158 	0x00100030, /* 6 - 1/3 */
159 	0x00100020, /* 6 - 1/2 */
160 	0x00100020, /* 6 - 2/3 */
161 	0x00100020, /* 6 - 1   */
217 	/* 6 - 1/6 are very enough ratio for SRC_BSDSR */  in rsnd_src_set_convert_rate()
354 	int irq = src->irq;  in rsnd_src_irq()
362 	 * IRQ is not supported on non-DT  in rsnd_src_irq()
433 	 * Enable SRC output if you want to use sync convert together with DVC  in rsnd_src_start()
460 	src->sync.val = 0;  in rsnd_src_init()
486 	src->sync.val = 0;  in rsnd_src_quit()
497 	spin_lock(&priv->lock);  in __rsnd_src_interrupt()
509 	spin_unlock(&priv->lock);  in __rsnd_src_interrupt()
512 		snd_pcm_stop_xrun(io->substream);  in __rsnd_src_interrupt()
530 	int irq = src->irq;  in rsnd_src_probe_()
535 		 * IRQ is not supported on non-DT  in rsnd_src_probe_()
547 	ret = rsnd_dma_attach(io, mod, &src->dma);  in rsnd_src_probe_()
560 	 * enable SRC sync convert if possible  in rsnd_src_pcm_new()
564 	 * It can't use SRC Synchronous convert  in rsnd_src_pcm_new()
571 	 * enable sync convert  in rsnd_src_pcm_new()
575 			       "SRC Out Rate Switch" :  in rsnd_src_pcm_new()
576 			       "SRC In Rate Switch",  in rsnd_src_pcm_new()
579 			       &src->sen, 1);  in rsnd_src_pcm_new()
585 			       "SRC Out Rate" :  in rsnd_src_pcm_new()
586 			       "SRC In Rate",  in rsnd_src_pcm_new()
589 			       &src->sync, 192000);  in rsnd_src_pcm_new()
635 		ret = -EINVAL;  in rsnd_src_probe()
641 		ret = -ENOMEM;  in rsnd_src_probe()
645 	priv->src_nr	= nr;  in rsnd_src_probe()
646 	priv->src	= src;  in rsnd_src_probe()
658 		src->irq = irq_of_parse_and_map(np, 0);  in rsnd_src_probe()
659 		if (!src->irq) {  in rsnd_src_probe()
660 			ret = -EINVAL;  in rsnd_src_probe()