ASoC: rsnd: enable clock-frequency for both 44.1kHz/48kHz

Current clock-frequency allows only 1 clock, but ADG can
handle both 44.1kHz/48kHz base clocks. This patch enables these.

On Salvator-X board, AUDIO_CLKOUT which is generated by ADG
is connected to ak4613 MCKI, and it should be synchronized with
LRCK. Thus, we need both 44.1kHz/48kHz base clock-frequency.
Otherwise, either one sounds strange in high frequency sound.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sh/rcar/adg.c b/sound/soc/sh/rcar/adg.c
index 214a9ce90bb41608100fbd1dd1da82792487151a..96fef91b480cdb8dd08274b1c7534df4d7daaf3a 100644 (file)
--- a/sound/soc/sh/rcar/adg.c
+++ b/sound/soc/sh/rcar/adg.c
@@ -43,6 +43,7 @@ struct rsnd_adg {
 };
 
 #define LRCLK_ASYNC    (1 << 0)
+#define AUDIO_OUT_48   (1 << 1)
 #define adg_mode_flags(adg)    (adg->flags)
 
 #define for_each_rsnd_clk(pos, adg, i)         \
@@ -364,7 +365,10 @@ found_clock:
 
        rsnd_adg_set_ssi_clk(ssi_mod, data);
 
-       if (!(adg_mode_flags(adg) & LRCLK_ASYNC)) {
+       if (adg_mode_flags(adg) & LRCLK_ASYNC) {
+               if (adg_mode_flags(adg) & AUDIO_OUT_48)
+                       ckr = 0x80000000;
+       } else {
                if (0 == (rate % 8000))
                        ckr = 0x80000000;
        }
@@ -427,11 +431,14 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
        struct clk *clk;
        struct device *dev = rsnd_priv_to_dev(priv);
        struct device_node *np = dev->of_node;
+       struct property *prop;
        u32 ckr, rbgx, rbga, rbgb;
-       u32 rate, req_rate = 0, div;
+       u32 rate, div;
+#define REQ_SIZE 2
+       u32 req_rate[REQ_SIZE] = {};
        uint32_t count = 0;
        unsigned long req_48kHz_rate, req_441kHz_rate;
-       int i;
+       int i, req_size;
        const char *parent_clk_name = NULL;
        static const char * const clkout_name[] = {
                [CLKOUT]  = "audio_clkout",
@@ -452,13 +459,18 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
         * ADG supports BRRA/BRRB output only
         * this means all clkout0/1/2/3 will be same rate
         */
-       of_property_read_u32(np, "clock-frequency", &req_rate);
+       prop = of_find_property(np, "clock-frequency", NULL);;
+       req_size = prop->length / sizeof(u32);
+
+       of_property_read_u32_array(np, "clock-frequency", req_rate, req_size);
        req_48kHz_rate = 0;
        req_441kHz_rate = 0;
-       if (0 == (req_rate % 44100))
-               req_441kHz_rate = req_rate;
-       if (0 == (req_rate % 48000))
-               req_48kHz_rate = req_rate;
+       for (i = 0; i < req_size; i++) {
+               if (0 == (req_rate[i] % 44100))
+                       req_441kHz_rate = req_rate[i];
+               if (0 == (req_rate[i] % 48000))
+                       req_48kHz_rate = req_rate[i];
+       }
 
        /*
         * This driver is assuming that AUDIO_CLKA/AUDIO_CLKB/AUDIO_CLKC
@@ -505,10 +517,8 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
                                rbgb = rbgx;
                                adg->rbgb_rate_for_48khz = rate / div;
                                ckr |= brg_table[i] << 16;
-                               if (req_48kHz_rate) {
+                               if (req_48kHz_rate)
                                        parent_clk_name = __clk_get_name(clk);
-                                       ckr |= 0x80000000;
-                               }
                        }
                }
        }
@@ -523,7 +533,7 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
         */
        if (!count) {
                clk = clk_register_fixed_rate(dev, clkout_name[CLKOUT],
-                                             parent_clk_name, 0, req_rate);
+                                             parent_clk_name, 0, req_rate[0]);
                if (!IS_ERR(clk)) {
                        adg->clkout[CLKOUT] = clk;
                        of_clk_add_provider(np, of_clk_src_simple_get, clk);
@@ -536,7 +546,7 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
                for (i = 0; i < CLKOUTMAX; i++) {
                        clk = clk_register_fixed_rate(dev, clkout_name[i],
                                                      parent_clk_name, 0,
-                                                     req_rate);
+                                                     req_rate[0]);
                        adg->clkout[i] = ERR_PTR(-ENOENT);
                        if (!IS_ERR(clk))
                                adg->clkout[i] = clk;
@@ -551,6 +561,9 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
        adg->rbga = rbga;
        adg->rbgb = rbgb;
 
+       if (req_rate[0] % 48000 == 0)
+               adg->flags = AUDIO_OUT_48;
+
        for_each_rsnd_clkout(clk, adg, i)
                dev_dbg(dev, "clkout %d : %p : %ld\n", i, clk, clk_get_rate(clk));
        dev_dbg(dev, "BRGCKR = 0x%08x, BRRA/BRRB = 0x%x/0x%x\n",