From 43e88f670a5e4618609822853a5f659631c32505 Mon Sep 17 00:00:00 2001 From: Jerome Brunet Date: Mon, 12 Aug 2019 14:07:25 +0200 Subject: [PATCH] drm/bridge: dw-hdmi-i2s: enable only the required i2s lanes Enable the i2s lanes depending on the number of channel in the stream Reviewed-by: Jonas Karlman Signed-off-by: Jerome Brunet Reviewed-by: Neil Armstrong Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20190812120726.1528-8-jbrunet@baylibre.com --- .../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, -- 2.30.2