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drm/i2c: tda998x: move audio routing configuration

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Move the mux and clocking selection out of tda998x_configure_audio()
into the parent functions, so we can validate this when parameters
are set outside of the audio mutex.

Tested-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Russell King 2019-03-01 21:17:04 +00:00
parent e4fe96f11e
commit 26f7bf1251
1 changed files with 47 additions and 31 deletions
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78
drivers/gpu/drm/i2c/tda998x_drv.c
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@ -41,7 +41,14 @@ enum {
AUDIO_ROUTE_NUM
};
struct tda998x_audio_route {
u8 ena_aclk;
u8 mux_ap;
u8 aip_clksel;
};
struct tda998x_audio_settings {
const struct tda998x_audio_route *route;
struct tda998x_audio_params params;
u8 ena_ap;
u8 i2s_format;
@ -868,6 +875,34 @@ tda998x_write_avi(struct tda998x_priv *priv, const struct drm_display_mode *mode
/* Audio support */
static const struct tda998x_audio_route tda998x_audio_route[AUDIO_ROUTE_NUM] = {
[AUDIO_ROUTE_I2S] = {
.ena_aclk = 1,
.mux_ap = MUX_AP_SELECT_I2S,
.aip_clksel = AIP_CLKSEL_AIP_I2S | AIP_CLKSEL_FS_ACLK,
},
[AUDIO_ROUTE_SPDIF] = {
.ena_aclk = 0,
.mux_ap = MUX_AP_SELECT_SPDIF,
.aip_clksel = AIP_CLKSEL_AIP_SPDIF | AIP_CLKSEL_FS_FS64SPDIF,
},
};
/* Configure the TDA998x audio data and clock routing. */
static int tda998x_derive_routing(struct tda998x_priv *priv,
struct tda998x_audio_settings *s,
unsigned int route)
{
s->route = &tda998x_audio_route[route];
s->ena_ap = priv->audio_port_enable[route];
if (s->ena_ap == 0) {
dev_err(&priv->hdmi->dev, "no audio configuration found\n");
return -EINVAL;
}
return 0;
}
/*
* The audio clock divisor register controls a divider producing Audio_Clk_Out
* from SERclk by dividing it by 2^n where 0 <= n <= 5. We don't know what
@ -960,7 +995,7 @@ static void tda998x_audio_mute(struct tda998x_priv *priv, bool on)
static int tda998x_configure_audio(struct tda998x_priv *priv,
const struct tda998x_audio_settings *settings)
{
u8 buf[6], aip_clksel, adiv;
u8 buf[6], adiv;
u32 n;
/* If audio is not configured, there is nothing to do. */
@ -971,28 +1006,10 @@ static int tda998x_configure_audio(struct tda998x_priv *priv,
/* Enable audio ports */
reg_write(priv, REG_ENA_AP, settings->ena_ap);
/* Set audio input source */
switch (settings->params.format) {
case AFMT_SPDIF:
reg_write(priv, REG_ENA_ACLK, 0);
reg_write(priv, REG_MUX_AP, MUX_AP_SELECT_SPDIF);
aip_clksel = AIP_CLKSEL_AIP_SPDIF | AIP_CLKSEL_FS_FS64SPDIF;
break;
case AFMT_I2S:
reg_write(priv, REG_ENA_ACLK, 1);
reg_write(priv, REG_MUX_AP, MUX_AP_SELECT_I2S);
aip_clksel = AIP_CLKSEL_AIP_I2S | AIP_CLKSEL_FS_ACLK;
break;
default:
dev_err(&priv->hdmi->dev, "Unsupported I2S format\n");
return -EINVAL;
}
reg_write(priv, REG_ENA_ACLK, settings->route->ena_aclk);
reg_write(priv, REG_MUX_AP, settings->route->mux_ap);
reg_write(priv, REG_I2S_FORMAT, settings->i2s_format);
reg_write(priv, REG_AIP_CLKSEL, aip_clksel);
reg_write(priv, REG_AIP_CLKSEL, settings->route->aip_clksel);
reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_LAYOUT |
AIP_CNTRL_0_ACR_MAN); /* auto CTS */
reg_write(priv, REG_CTS_N, settings->cts_n);
@ -1071,14 +1088,6 @@ static int tda998x_audio_hw_params(struct device *dev, void *data,
return -EINVAL;
}
audio.params.format = spdif ? AFMT_SPDIF : AFMT_I2S;
audio.ena_ap = priv->audio_port_enable[AUDIO_ROUTE_I2S + spdif];
if (audio.ena_ap == 0) {
dev_err(dev, "%s: No audio configuration found\n", __func__);
return -EINVAL;
}
if (!spdif &&
(daifmt->bit_clk_inv || daifmt->frame_clk_inv ||
daifmt->bit_clk_master || daifmt->frame_clk_master)) {
@ -1089,6 +1098,10 @@ static int tda998x_audio_hw_params(struct device *dev, void *data,
return -EINVAL;
}
ret = tda998x_derive_routing(priv, &audio, AUDIO_ROUTE_I2S + spdif);
if (ret < 0)
return ret;
bclk_ratio = spdif ? 64 : params->sample_width * 2;
ret = tda998x_derive_cts_n(priv, &audio, bclk_ratio);
if (ret < 0)
@ -1699,9 +1712,12 @@ static int tda998x_set_config(struct tda998x_priv *priv,
(p->mirr_f ? VIP_CNTRL_2_MIRR_F : 0);
if (p->audio_params.format != AFMT_UNUSED) {
unsigned int ratio;
unsigned int ratio, route;
bool spdif = p->audio_params.format == AFMT_SPDIF;
route = AUDIO_ROUTE_I2S + spdif;
priv->audio.route = &tda998x_audio_route[route];
priv->audio.params = p->audio_params;
priv->audio.ena_ap = p->audio_params.config;
priv->audio.i2s_format = I2S_FORMAT_PHILIPS;