@@ -4600,6 +4600,7 @@ enum ec_codec_i2s_rx_subcmd {
EC_CODEC_I2S_RX_SET_SAMPLE_DEPTH = 0x2,
EC_CODEC_I2S_RX_SET_DAIFMT = 0x3,
EC_CODEC_I2S_RX_SET_BCLK = 0x4,
+ EC_CODEC_I2S_RX_RESET = 0x5,
EC_CODEC_I2S_RX_SUBCMD_COUNT,
};
@@ -1011,6 +1011,17 @@ 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,
+ "Command not found. Please update the EC firmware.\n");
+ } else if (ret) {
+ dev_err(dev, "failed to EC_CODEC_I2S_RESET: %d\n", ret);
+ }
+
platform_set_drvdata(pdev, priv);
ret = devm_snd_soc_register_component(dev, &i2s_rx_component_driver,
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 <yuhsuan@chromium.org> --- This patch checks the return value. If it is -ENOPROTOOPT (EC_RES_INVALID_VERSION), it will ask clients to update EC firmware. Previous patches v1: https://patchwork.kernel.org/project/alsa-devel/patch/20200708071117.3070707-1-yuhsuan@chromium.org/ v2: https://patchwork.kernel.org/project/alsa-devel/patch/20200716170914.3623060-1-yuhsuan@chromium.org/ v3: https://patchwork.kernel.org/project/alsa-devel/patch/20210106050559.1459027-1-yuhsuan@chromium.org/ v4: https://patchwork.kernel.org/project/alsa-devel/patch/20210107085942.2891525-2-yuhsuan@chromium.org/ include/linux/platform_data/cros_ec_commands.h | 1 + sound/soc/codecs/cros_ec_codec.c | 11 +++++++++++ 2 files changed, 12 insertions(+)