From: Dragos Tarcatu dragos_tarcatu@mentor.com
The slot width (system word length) was fixed at 32 bits. This patch allows also setting it to 16 or 24 bits.
Signed-off-by: Dragos Tarcatu dragos_tarcatu@mentor.com Signed-off-by: Jiada Wang jiada_wang@mentor.com Signed-off-by: Timo Wischer twischer@de.adit-jv.com [Kuninori: tidyup for upstream] Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com Tested-by: Hiroyuki Yokoyama hiroyuki.yokoyama.vx@renesas.com --- sound/soc/sh/rcar/core.c | 32 +++++++++++++++++++++------- sound/soc/sh/rcar/rsnd.h | 8 ++++++- sound/soc/sh/rcar/ssi.c | 54 +++++++++++++++++++++++++++++++++++------------- 3 files changed, 72 insertions(+), 22 deletions(-)
diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c index ab7e317..ce0a3a6 100644 --- a/sound/soc/sh/rcar/core.c +++ b/sound/soc/sh/rcar/core.c @@ -540,6 +540,14 @@ int rsnd_rdai_ssi_lane_ctrl(struct rsnd_dai *rdai, return rdai->ssi_lane; }
+int rsnd_rdai_width_ctrl(struct rsnd_dai *rdai, int width) +{ + if (width > 0) + rdai->chan_width = width; + + return rdai->chan_width; +} + struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id) { if ((id < 0) || (id >= rsnd_rdai_nr(priv))) @@ -720,6 +728,16 @@ static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai, struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); struct device *dev = rsnd_priv_to_dev(priv);
+ switch (slot_width) { + case 16: + case 24: + case 32: + break; + default: + dev_err(dev, "unsupported slot width value: %d\n", slot_width); + return -EINVAL; + } + switch (slots) { case 2: case 6: @@ -727,6 +745,7 @@ static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai, /* TDM Extend Mode */ rsnd_rdai_channels_set(rdai, slots); rsnd_rdai_ssi_lane_set(rdai, 1); + rsnd_rdai_width_set(rdai, slot_width); break; default: dev_err(dev, "unsupported TDM slots (%d)\n", slots); @@ -755,7 +774,7 @@ static unsigned int rsnd_soc_hw_rate_list[] = { 192000, };
-static int rsnd_soc_hw_rule(struct rsnd_priv *priv, +static int rsnd_soc_hw_rule(struct rsnd_dai *rdai, unsigned int *list, int list_num, struct snd_interval *baseline, struct snd_interval *iv) { @@ -772,14 +791,14 @@ static int rsnd_soc_hw_rule(struct rsnd_priv *priv, if (!snd_interval_test(iv, list[i])) continue;
- rate = rsnd_ssi_clk_query(priv, + rate = rsnd_ssi_clk_query(rdai, baseline->min, list[i], NULL); if (rate > 0) { p.min = min(p.min, list[i]); p.max = max(p.max, list[i]); }
- rate = rsnd_ssi_clk_query(priv, + rate = rsnd_ssi_clk_query(rdai, baseline->max, list[i], NULL); if (rate > 0) { p.min = min(p.min, list[i]); @@ -799,7 +818,6 @@ static int __rsnd_soc_hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_interval ic; struct snd_soc_dai *dai = rule->private; struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); - struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); struct rsnd_dai_stream *io = is_play ? &rdai->playback : &rdai->capture;
/* @@ -811,7 +829,7 @@ static int __rsnd_soc_hw_rule_rate(struct snd_pcm_hw_params *params, ic.min = ic.max = rsnd_runtime_channel_for_ssi_with_params(io, params);
- return rsnd_soc_hw_rule(priv, rsnd_soc_hw_rate_list, + return rsnd_soc_hw_rule(rdai, rsnd_soc_hw_rate_list, ARRAY_SIZE(rsnd_soc_hw_rate_list), &ic, ir); } @@ -837,7 +855,6 @@ static int __rsnd_soc_hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_interval ic; struct snd_soc_dai *dai = rule->private; struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); - struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); struct rsnd_dai_stream *io = is_play ? &rdai->playback : &rdai->capture;
/* @@ -849,7 +866,7 @@ static int __rsnd_soc_hw_rule_channels(struct snd_pcm_hw_params *params, ic.min = ic.max = rsnd_runtime_channel_for_ssi_with_params(io, params);
- return rsnd_soc_hw_rule(priv, rsnd_soc_hw_channels_list, + return rsnd_soc_hw_rule(rdai, rsnd_soc_hw_channels_list, ARRAY_SIZE(rsnd_soc_hw_channels_list), ir, &ic); } @@ -1072,6 +1089,7 @@ static void __rsnd_dai_probe(struct rsnd_priv *priv, rdai->capture.rdai = rdai; rsnd_rdai_channels_set(rdai, 2); /* default 2ch */ rsnd_rdai_ssi_lane_set(rdai, 1); /* default 1lane */ + rsnd_rdai_width_set(rdai, 32); /* default 32bit width */
for (io_i = 0;; io_i++) { playback = of_parse_phandle(dai_np, "playback", io_i); diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h index 96d9333..698b081 100644 --- a/sound/soc/sh/rcar/rsnd.h +++ b/sound/soc/sh/rcar/rsnd.h @@ -460,6 +460,7 @@ struct rsnd_dai {
int max_channels; /* 2ch - 16ch */ int ssi_lane; /* 1lane - 4lane */ + int chan_width; /* 16/24/32 bit width */
unsigned int clk_master:1; unsigned int bit_clk_inv:1; @@ -493,6 +494,11 @@ int rsnd_rdai_channels_ctrl(struct rsnd_dai *rdai, int rsnd_rdai_ssi_lane_ctrl(struct rsnd_dai *rdai, int ssi_lane);
+#define rsnd_rdai_width_set(rdai, width) \ + rsnd_rdai_width_ctrl(rdai, width) +#define rsnd_rdai_width_get(rdai) \ + rsnd_rdai_width_ctrl(rdai, 0) +int rsnd_rdai_width_ctrl(struct rsnd_dai *rdai, int width); void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io); int rsnd_dai_connect(struct rsnd_mod *mod, struct rsnd_dai_stream *io, @@ -702,7 +708,7 @@ int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod); void rsnd_parse_connect_ssi(struct rsnd_dai *rdai, struct device_node *playback, struct device_node *capture); -unsigned int rsnd_ssi_clk_query(struct rsnd_priv *priv, +unsigned int rsnd_ssi_clk_query(struct rsnd_dai *rdai, int param1, int param2, int *idx);
/* diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c index 8304e4e..f707f53 100644 --- a/sound/soc/sh/rcar/ssi.c +++ b/sound/soc/sh/rcar/ssi.c @@ -42,7 +42,13 @@ #define DWL_24 (5 << 19) /* Data Word Length */ #define DWL_32 (6 << 19) /* Data Word Length */
+/* + * System word length + */ +#define SWL_16 (1 << 16) /* R/W System Word Length */ +#define SWL_24 (2 << 16) /* R/W System Word Length */ #define SWL_32 (3 << 16) /* R/W System Word Length */ + #define SCKD (1 << 15) /* Serial Bit Clock Direction */ #define SWSD (1 << 14) /* Serial WS Direction */ #define SCKP (1 << 13) /* Serial Bit Clock Polarity */ @@ -220,14 +226,32 @@ u32 rsnd_ssi_multi_slaves_runtime(struct rsnd_dai_stream *io) return 0; }
-unsigned int rsnd_ssi_clk_query(struct rsnd_priv *priv, +static u32 rsnd_rdai_width_to_swl(struct rsnd_dai *rdai) +{ + struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); + struct device *dev = rsnd_priv_to_dev(priv); + int width = rsnd_rdai_width_get(rdai); + + switch (width) { + case 32: return SWL_32; + case 24: return SWL_24; + case 16: return SWL_16; + } + + dev_err(dev, "unsupported slot width value: %d\n", width); + return 0; +} + +unsigned int rsnd_ssi_clk_query(struct rsnd_dai *rdai, int param1, int param2, int *idx) { + struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); int ssi_clk_mul_table[] = { 1, 2, 4, 8, 16, 6, 12, }; int j, ret; unsigned int main_rate; + int width = rsnd_rdai_width_get(rdai);
for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
@@ -240,12 +264,7 @@ unsigned int rsnd_ssi_clk_query(struct rsnd_priv *priv, if (j == 0) continue;
- /* - * this driver is assuming that - * system word is 32bit x chan - * see rsnd_ssi_init() - */ - main_rate = 32 * param1 * param2 * ssi_clk_mul_table[j]; + main_rate = width * param1 * param2 * ssi_clk_mul_table[j];
ret = rsnd_adg_clk_query(priv, main_rate); if (ret < 0) @@ -292,7 +311,7 @@ static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod, return 0; }
- main_rate = rsnd_ssi_clk_query(priv, rate, chan, &idx); + main_rate = rsnd_ssi_clk_query(rdai, rate, chan, &idx); if (!main_rate) { dev_err(dev, "unsupported clock rate\n"); return -EIO; @@ -312,7 +331,8 @@ static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod, * SSICR : FORCE, SCKD, SWSD * SSIWSR : CONT */ - ssi->cr_clk = FORCE | SWL_32 | SCKD | SWSD | CKDV(idx); + ssi->cr_clk = FORCE | rsnd_rdai_width_to_swl(rdai) | + SCKD | SWSD | CKDV(idx); ssi->wsr = CONT; ssi->rate = rate;
@@ -357,11 +377,7 @@ static void rsnd_ssi_config_init(struct rsnd_mod *mod,
is_tdm = rsnd_runtime_is_ssi_tdm(io);
- /* - * always use 32bit system word. - * see also rsnd_ssi_master_clk_enable() - */ - cr_own |= FORCE | SWL_32; + cr_own |= FORCE | rsnd_rdai_width_to_swl(rdai);
if (rdai->bit_clk_inv) cr_own |= SCKP; @@ -494,7 +510,17 @@ static int rsnd_ssi_hw_params(struct rsnd_mod *mod, struct snd_pcm_hw_params *params) { struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + struct rsnd_dai *rdai = rsnd_io_to_rdai(io); int chan = params_channels(params); + unsigned int fmt_width = snd_pcm_format_width(params_format(params)); + + if (fmt_width > rdai->chan_width) { + struct rsnd_priv *priv = rsnd_io_to_priv(io); + struct device *dev = rsnd_priv_to_dev(priv); + + dev_err(dev, "invalid combination of slot-width and format-data-width\n"); + return -EINVAL; + }
/* * snd_pcm_ops::hw_params will be called *before*