From: Yu-Hsuan Hsu <yuhsuan@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: alsa-devel@alsa-project.org,
"Gustavo A . R . Silva" <gustavoars@kernel.org>,
Takashi Iwai <tiwai@suse.com>,
Liam Girdwood <lgirdwood@gmail.com>,
Guenter Roeck <groeck@chromium.org>,
Mark Brown <broonie@kernel.org>,
Prashant Malani <pmalani@chromium.org>,
Pi-Hsun Shih <pihsun@chromium.org>,
Enric Balletbo i Serra <enric.balletbo@collabora.com>,
Benson Leung <bleung@chromium.org>,
Yu-Hsuan Hsu <yuhsuan@chromium.org>,
Cheng-Yi Chiang <cychiang@chromium.org>
Subject: [PATCH v7 2/2] ASoC: cros_ec_codec: Reset I2S RX when probing
Date: Fri, 15 Jan 2021 15:53:01 +0800 [thread overview]
Message-ID: <20210115075301.47995-2-yuhsuan@chromium.org> (raw)
In-Reply-To: <20210115075301.47995-1-yuhsuan@chromium.org>
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>
---
Updated the info message.
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,
--
2.30.0.296.g2bfb1c46d8-goog
next prev parent reply other threads:[~2021-01-15 7:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-15 7:53 [PATCH v7 1/2] cros_ec_commands: Add EC_CODEC_I2S_RX_RESET Yu-Hsuan Hsu
2021-01-15 7:53 ` Yu-Hsuan Hsu [this message]
2021-01-19 11:36 ` [PATCH v7 2/2] ASoC: cros_ec_codec: Reset I2S RX when probing Enric Balletbo i Serra
2021-01-19 11:35 ` [PATCH v7 1/2] cros_ec_commands: Add EC_CODEC_I2S_RX_RESET Enric Balletbo i Serra
2021-01-21 0:05 ` Mark Brown
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