When changing the audio hw params, reset the audio fifo to make sure any old remaining data is flushed.
The databook mentions that such reset should be followed by a reset of the i2s block to make sure the samples stay aligned
Cc: Jonas Karlman jonas@kwiboo.se Signed-off-by: Jerome Brunet jbrunet@baylibre.com --- drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c | 6 ++++-- drivers/gpu/drm/bridge/synopsys/dw-hdmi.h | 1 + 2 files changed, 5 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 0864dee8d180..41bee0099578 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c @@ -49,6 +49,10 @@ static int dw_hdmi_i2s_hw_params(struct device *dev, void *data, return -EINVAL; }
+ /* Reset the FIFOs before applying new params */ + hdmi_write(audio, HDMI_AUD_CONF0_SW_RESET, HDMI_AUD_CONF0); + hdmi_write(audio, (u8)~HDMI_MC_SWRSTZ_I2SSWRST_REQ, HDMI_MC_SWRSTZ); + inputclkfs = HDMI_AUD_INPUTCLKFS_64FS; conf0 = HDMI_AUD_CONF0_I2S_ALL_ENABLE;
@@ -102,8 +106,6 @@ static void dw_hdmi_i2s_audio_shutdown(struct device *dev, void *data) struct dw_hdmi *hdmi = audio->hdmi;
dw_hdmi_audio_disable(hdmi); - - hdmi_write(audio, HDMI_AUD_CONF0_SW_RESET, HDMI_AUD_CONF0); }
static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component, diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h index 091d7c28aa17..a272fa393ae6 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h @@ -940,6 +940,7 @@ enum { HDMI_MC_CLKDIS_PIXELCLK_DISABLE = 0x1,
/* MC_SWRSTZ field values */ + HDMI_MC_SWRSTZ_I2SSWRST_REQ = 0x08, HDMI_MC_SWRSTZ_TMDSSWRST_REQ = 0x02,
/* MC_FLOWCTRL field values */