From 7f1f7ae102ea082745e320b3c8c003f43c063edf Mon Sep 17 00:00:00 2001 From: Yu-Hsuan Hsu Date: Fri, 15 Jan 2021 15:53:01 +0800 Subject: [PATCH] ASoC: cros_ec_codec: Reset I2S RX when probing It is not guaranteed that I2S RX is disabled when the kernel booting. For example, if the kernel crashes while it is enabled, it will keep enabled until the next time EC reboots. Reset I2S RX when probing to fix this issue. Signed-off-by: Yu-Hsuan Hsu Reviewed-by: Enric Balletbo i Serra Link: https://lore.kernel.org/r/20210115075301.47995-2-yuhsuan@chromium.org Signed-off-by: Mark Brown --- sound/soc/codecs/cros_ec_codec.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c index f33a2a9654e7..c4772f82485a 100644 --- a/sound/soc/codecs/cros_ec_codec.c +++ b/sound/soc/codecs/cros_ec_codec.c @@ -1011,6 +1011,18 @@ static int cros_ec_codec_platform_probe(struct platform_device *pdev) } priv->ec_capabilities = r.capabilities; + /* Reset EC codec i2s rx. */ + p.cmd = EC_CODEC_I2S_RX_RESET; + ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX, + (uint8_t *)&p, sizeof(p), NULL, 0); + if (ret == -ENOPROTOOPT) { + dev_info(dev, + "Missing reset command. Please update EC firmware.\n"); + } else if (ret) { + dev_err(dev, "failed to EC_CODEC_I2S_RESET: %d\n", ret); + return ret; + } + platform_set_drvdata(pdev, priv); ret = devm_snd_soc_register_component(dev, &i2s_rx_component_driver, -- 2.11.0