Enable the i2s lanes depending on the number of channel in the stream
Reviewed-by: Jonas Karlman <jonas@xxxxxxxxx>
Signed-off-by: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
---
.../gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c | 15 ++++++++++++++-
drivers/gpu/drm/bridge/synopsys/dw-hdmi.h | 6 +++++-
2 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
index 41bee0099578..b8ece9c1ba2c 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
@@ -54,7 +54,20 @@ static int dw_hdmi_i2s_hw_params(struct device *dev, void *data,
hdmi_write(audio, (u8)~HDMI_MC_SWRSTZ_I2SSWRST_REQ, HDMI_MC_SWRSTZ);
inputclkfs = HDMI_AUD_INPUTCLKFS_64FS;
- conf0 = HDMI_AUD_CONF0_I2S_ALL_ENABLE;
+ conf0 = (HDMI_AUD_CONF0_I2S_SELECT | HDMI_AUD_CONF0_I2S_EN0);
+
+ /* Enable the required i2s lanes */
+ switch (hparms->channels) {
+ case 7 ... 8:
+ conf0 |= HDMI_AUD_CONF0_I2S_EN3;
+ /* Fall-thru */
+ case 5 ... 6:
+ conf0 |= HDMI_AUD_CONF0_I2S_EN2;
+ /* Fall-thru */
+ case 3 ... 4:
+ conf0 |= HDMI_AUD_CONF0_I2S_EN1;
+ /* Fall-thru */
+ }
switch (hparms->sample_width) {
case 16:
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h
index a272fa393ae6..6988f12d89d9 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h
@@ -865,7 +865,11 @@ enum {
/* AUD_CONF0 field values */
HDMI_AUD_CONF0_SW_RESET = 0x80,
- HDMI_AUD_CONF0_I2S_ALL_ENABLE = 0x2F,
+ HDMI_AUD_CONF0_I2S_SELECT = 0x20,
+ HDMI_AUD_CONF0_I2S_EN3 = 0x08,
+ HDMI_AUD_CONF0_I2S_EN2 = 0x04,
+ HDMI_AUD_CONF0_I2S_EN1 = 0x02,
+ HDMI_AUD_CONF0_I2S_EN0 = 0x01,
/* AUD_CONF1 field values */
HDMI_AUD_CONF1_MODE_I2S = 0x00,
--
2.21.0
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