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.
Signed-off-by: Russell King <rmk+ker...@armlinux.org.uk>
---
drivers/gpu/drm/i2c/tda998x_drv.c | 78 +++++++++++++++++++++++----------------
1 file changed, 47 insertions(+), 31 deletions(-)
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c
b/drivers/gpu/drm/i2c/tda998x_drv.c
index 8b79619ff152..14d1672301ae 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -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;
--
2.7.4
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