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* [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
@ 2020-07-16 17:09 ` Yu-Hsuan Hsu
  0 siblings, 0 replies; 12+ messages in thread
From: Yu-Hsuan Hsu @ 2020-07-16 17:09 UTC (permalink / raw)
  To: linux-kernel
  Cc: Tzung-Bi Shih, Cheng-Yi Chiang, Enric Balletbo i Serra,
	Guenter Roeck, Liam Girdwood, Mark Brown, Jaroslav Kysela,
	Takashi Iwai, Benson Leung, alsa-devel, Yu-Hsuan Hsu

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>
---
 drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
 include/linux/platform_data/cros_ec_commands.h | 1 +
 sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index 3e745e0fe092c..2c60690d7147c 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
 		return -ENOTSUPP;
 	} else if (msg->result != EC_RES_SUCCESS) {
 		dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
-		return -EPROTO;
+		switch (msg->result) {
+		case EC_RES_INVALID_PARAM:
+			return -EINVAL;
+		default:
+			return -EPROTO;
+		}
 	}
 
 	return ret;
diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
index 69210881ebac8..11ce917ca924c 100644
--- a/include/linux/platform_data/cros_ec_commands.h
+++ b/include/linux/platform_data/cros_ec_commands.h
@@ -4598,6 +4598,7 @@ 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,
 };
 
diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
index f23956cf4ed84..b5ff30b7f1aa8 100644
--- a/sound/soc/codecs/cros_ec_codec.c
+++ b/sound/soc/codecs/cros_ec_codec.c
@@ -1034,6 +1034,15 @@ 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 == -EINVAL)
+		dev_info(dev, "Missing reset command. Please update your 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,
-- 
2.27.0.389.gc38d7665816-goog


^ permalink raw reply related	[flat|nested] 12+ messages in thread
* [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
@ 2020-07-16 17:09 ` Yu-Hsuan Hsu
  0 siblings, 0 replies; 12+ messages in thread
From: Yu-Hsuan Hsu @ 2020-07-16 17:09 UTC (permalink / raw)
  To: linux-kernel
  Cc: alsa-devel, Takashi Iwai, Liam Girdwood, Tzung-Bi Shih,
	Mark Brown, Enric Balletbo i Serra, Guenter Roeck, Benson Leung,
	Yu-Hsuan Hsu, Cheng-Yi Chiang

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>
---
 drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
 include/linux/platform_data/cros_ec_commands.h | 1 +
 sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index 3e745e0fe092c..2c60690d7147c 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
 		return -ENOTSUPP;
 	} else if (msg->result != EC_RES_SUCCESS) {
 		dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
-		return -EPROTO;
+		switch (msg->result) {
+		case EC_RES_INVALID_PARAM:
+			return -EINVAL;
+		default:
+			return -EPROTO;
+		}
 	}
 
 	return ret;
diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
index 69210881ebac8..11ce917ca924c 100644
--- a/include/linux/platform_data/cros_ec_commands.h
+++ b/include/linux/platform_data/cros_ec_commands.h
@@ -4598,6 +4598,7 @@ 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,
 };
 
diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
index f23956cf4ed84..b5ff30b7f1aa8 100644
--- a/sound/soc/codecs/cros_ec_codec.c
+++ b/sound/soc/codecs/cros_ec_codec.c
@@ -1034,6 +1034,15 @@ 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 == -EINVAL)
+		dev_info(dev, "Missing reset command. Please update your 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,
-- 
2.27.0.389.gc38d7665816-goog


^ permalink raw reply related	[flat|nested] 12+ messages in thread
* Re: [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
  2020-07-16 17:09 ` Yu-Hsuan Hsu
@ 2020-07-16 17:23   ` Guenter Roeck
  -1 siblings, 0 replies; 12+ messages in thread
From: Guenter Roeck @ 2020-07-16 17:23 UTC (permalink / raw)
  To: Yu-Hsuan Hsu
  Cc: linux-kernel, Tzung-Bi Shih, Cheng-Yi Chiang,
	Enric Balletbo i Serra, Guenter Roeck, Liam Girdwood, Mark Brown,
	Jaroslav Kysela, Takashi Iwai, Benson Leung, ALSA development

On Thu, Jul 16, 2020 at 10:09 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
>
> 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>
> ---
>  drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
>  include/linux/platform_data/cros_ec_commands.h | 1 +
>  sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
>  3 files changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
> index 3e745e0fe092c..2c60690d7147c 100644
> --- a/drivers/platform/chrome/cros_ec_proto.c
> +++ b/drivers/platform/chrome/cros_ec_proto.c
> @@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
>                 return -ENOTSUPP;
>         } else if (msg->result != EC_RES_SUCCESS) {
>                 dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
> -               return -EPROTO;
> +               switch (msg->result) {
> +               case EC_RES_INVALID_PARAM:
> +                       return -EINVAL;

As we have learned, this may impact other callers of
cros_ec_cmd_xfer_status() which only accept -EPROTO as error return
value. In addition to that, the code is odd:

    if (msg->result == EC_RES_INVALID_VERSION) {
        ...
    } else if (msg->result != EC_RES_SUCCESS) {
        switch (msg->result) {
        ....
        }
    }

I really dislike the notion of changing error return values of
cros_ec_cmd_xfer_status() one by one. That can only cause ongoing
trouble with callers expecting specific error return codes (as we have
already seen).

Guenter

> +               default:
> +                       return -EPROTO;
> +               }
>         }
>
>         return ret;
> diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
> index 69210881ebac8..11ce917ca924c 100644
> --- a/include/linux/platform_data/cros_ec_commands.h
> +++ b/include/linux/platform_data/cros_ec_commands.h
> @@ -4598,6 +4598,7 @@ 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,
>  };
>
> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
> index f23956cf4ed84..b5ff30b7f1aa8 100644
> --- a/sound/soc/codecs/cros_ec_codec.c
> +++ b/sound/soc/codecs/cros_ec_codec.c
> @@ -1034,6 +1034,15 @@ 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 == -EINVAL)
> +               dev_info(dev, "Missing reset command. Please update your 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,
> --
> 2.27.0.389.gc38d7665816-goog
>

^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
@ 2020-07-16 17:23   ` Guenter Roeck
  0 siblings, 0 replies; 12+ messages in thread
From: Guenter Roeck @ 2020-07-16 17:23 UTC (permalink / raw)
  To: Yu-Hsuan Hsu
  Cc: ALSA development, Takashi Iwai, Liam Girdwood, linux-kernel,
	Tzung-Bi Shih, Mark Brown, Enric Balletbo i Serra, Guenter Roeck,
	Benson Leung, Cheng-Yi Chiang

On Thu, Jul 16, 2020 at 10:09 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
>
> 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>
> ---
>  drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
>  include/linux/platform_data/cros_ec_commands.h | 1 +
>  sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
>  3 files changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
> index 3e745e0fe092c..2c60690d7147c 100644
> --- a/drivers/platform/chrome/cros_ec_proto.c
> +++ b/drivers/platform/chrome/cros_ec_proto.c
> @@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
>                 return -ENOTSUPP;
>         } else if (msg->result != EC_RES_SUCCESS) {
>                 dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
> -               return -EPROTO;
> +               switch (msg->result) {
> +               case EC_RES_INVALID_PARAM:
> +                       return -EINVAL;

As we have learned, this may impact other callers of
cros_ec_cmd_xfer_status() which only accept -EPROTO as error return
value. In addition to that, the code is odd:

    if (msg->result == EC_RES_INVALID_VERSION) {
        ...
    } else if (msg->result != EC_RES_SUCCESS) {
        switch (msg->result) {
        ....
        }
    }

I really dislike the notion of changing error return values of
cros_ec_cmd_xfer_status() one by one. That can only cause ongoing
trouble with callers expecting specific error return codes (as we have
already seen).

Guenter

> +               default:
> +                       return -EPROTO;
> +               }
>         }
>
>         return ret;
> diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
> index 69210881ebac8..11ce917ca924c 100644
> --- a/include/linux/platform_data/cros_ec_commands.h
> +++ b/include/linux/platform_data/cros_ec_commands.h
> @@ -4598,6 +4598,7 @@ 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,
>  };
>
> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
> index f23956cf4ed84..b5ff30b7f1aa8 100644
> --- a/sound/soc/codecs/cros_ec_codec.c
> +++ b/sound/soc/codecs/cros_ec_codec.c
> @@ -1034,6 +1034,15 @@ 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 == -EINVAL)
> +               dev_info(dev, "Missing reset command. Please update your 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,
> --
> 2.27.0.389.gc38d7665816-goog
>

^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
  2020-07-16 17:23   ` Guenter Roeck
@ 2020-07-16 17:47     ` Enric Balletbo i Serra
  -1 siblings, 0 replies; 12+ messages in thread
From: Enric Balletbo i Serra @ 2020-07-16 17:47 UTC (permalink / raw)
  To: Guenter Roeck, Yu-Hsuan Hsu
  Cc: linux-kernel, Tzung-Bi Shih, Cheng-Yi Chiang, Guenter Roeck,
	Liam Girdwood, Mark Brown, Jaroslav Kysela, Takashi Iwai,
	Benson Leung, ALSA development

Hi,

On 16/7/20 19:23, Guenter Roeck wrote:
> On Thu, Jul 16, 2020 at 10:09 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
>>
>> 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>
>> ---
>>  drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
>>  include/linux/platform_data/cros_ec_commands.h | 1 +
>>  sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
>>  3 files changed, 16 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
>> index 3e745e0fe092c..2c60690d7147c 100644
>> --- a/drivers/platform/chrome/cros_ec_proto.c
>> +++ b/drivers/platform/chrome/cros_ec_proto.c
>> @@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
>>                 return -ENOTSUPP;
>>         } else if (msg->result != EC_RES_SUCCESS) {
>>                 dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
>> -               return -EPROTO;
>> +               switch (msg->result) {
>> +               case EC_RES_INVALID_PARAM:
>> +                       return -EINVAL;
> 
> As we have learned, this may impact other callers of
> cros_ec_cmd_xfer_status() which only accept -EPROTO as error return
> value. In addition to that, the code is odd:
> 
>     if (msg->result == EC_RES_INVALID_VERSION) {
>         ...
>     } else if (msg->result != EC_RES_SUCCESS) {
>         switch (msg->result) {
>         ....
>         }
>     }
> 

Ack, this is odd.

> I really dislike the notion of changing error return values of
> cros_ec_cmd_xfer_status() one by one. That can only cause ongoing
> trouble with callers expecting specific error return codes (as we have
> already seen).
> 

Hmm, that's a good point. Ok.

Let's apply the Guenter's patch that maps the errors *and* fix the callers of
cros_ec_cmd_xfer_status which only accept -EPROTO (there are few).

Yu-Hsuan, can you take care of this and send a patch series with all the
required patches? If not, I can work on this next week.

Thanks,
  Enric

> Guenter
> 
>> +               default:
>> +                       return -EPROTO;
>> +               }
>>         }
>>
>>         return ret;
>> diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
>> index 69210881ebac8..11ce917ca924c 100644
>> --- a/include/linux/platform_data/cros_ec_commands.h
>> +++ b/include/linux/platform_data/cros_ec_commands.h
>> @@ -4598,6 +4598,7 @@ 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,
>>  };
>>
>> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
>> index f23956cf4ed84..b5ff30b7f1aa8 100644
>> --- a/sound/soc/codecs/cros_ec_codec.c
>> +++ b/sound/soc/codecs/cros_ec_codec.c
>> @@ -1034,6 +1034,15 @@ 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 == -EINVAL)
>> +               dev_info(dev, "Missing reset command. Please update your 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,
>> --
>> 2.27.0.389.gc38d7665816-goog
>>

^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
@ 2020-07-16 17:47     ` Enric Balletbo i Serra
  0 siblings, 0 replies; 12+ messages in thread
From: Enric Balletbo i Serra @ 2020-07-16 17:47 UTC (permalink / raw)
  To: Guenter Roeck, Yu-Hsuan Hsu
  Cc: ALSA development, Takashi Iwai, Liam Girdwood, linux-kernel,
	Tzung-Bi Shih, Mark Brown, Guenter Roeck, Benson Leung,
	Cheng-Yi Chiang

Hi,

On 16/7/20 19:23, Guenter Roeck wrote:
> On Thu, Jul 16, 2020 at 10:09 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
>>
>> 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>
>> ---
>>  drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
>>  include/linux/platform_data/cros_ec_commands.h | 1 +
>>  sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
>>  3 files changed, 16 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
>> index 3e745e0fe092c..2c60690d7147c 100644
>> --- a/drivers/platform/chrome/cros_ec_proto.c
>> +++ b/drivers/platform/chrome/cros_ec_proto.c
>> @@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
>>                 return -ENOTSUPP;
>>         } else if (msg->result != EC_RES_SUCCESS) {
>>                 dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
>> -               return -EPROTO;
>> +               switch (msg->result) {
>> +               case EC_RES_INVALID_PARAM:
>> +                       return -EINVAL;
> 
> As we have learned, this may impact other callers of
> cros_ec_cmd_xfer_status() which only accept -EPROTO as error return
> value. In addition to that, the code is odd:
> 
>     if (msg->result == EC_RES_INVALID_VERSION) {
>         ...
>     } else if (msg->result != EC_RES_SUCCESS) {
>         switch (msg->result) {
>         ....
>         }
>     }
> 

Ack, this is odd.

> I really dislike the notion of changing error return values of
> cros_ec_cmd_xfer_status() one by one. That can only cause ongoing
> trouble with callers expecting specific error return codes (as we have
> already seen).
> 

Hmm, that's a good point. Ok.

Let's apply the Guenter's patch that maps the errors *and* fix the callers of
cros_ec_cmd_xfer_status which only accept -EPROTO (there are few).

Yu-Hsuan, can you take care of this and send a patch series with all the
required patches? If not, I can work on this next week.

Thanks,
  Enric

> Guenter
> 
>> +               default:
>> +                       return -EPROTO;
>> +               }
>>         }
>>
>>         return ret;
>> diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
>> index 69210881ebac8..11ce917ca924c 100644
>> --- a/include/linux/platform_data/cros_ec_commands.h
>> +++ b/include/linux/platform_data/cros_ec_commands.h
>> @@ -4598,6 +4598,7 @@ 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,
>>  };
>>
>> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
>> index f23956cf4ed84..b5ff30b7f1aa8 100644
>> --- a/sound/soc/codecs/cros_ec_codec.c
>> +++ b/sound/soc/codecs/cros_ec_codec.c
>> @@ -1034,6 +1034,15 @@ 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 == -EINVAL)
>> +               dev_info(dev, "Missing reset command. Please update your 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,
>> --
>> 2.27.0.389.gc38d7665816-goog
>>

^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
  2020-07-16 17:47     ` Enric Balletbo i Serra
@ 2020-07-17 14:32       ` Guenter Roeck
  -1 siblings, 0 replies; 12+ messages in thread
From: Guenter Roeck @ 2020-07-17 14:32 UTC (permalink / raw)
  To: Enric Balletbo i Serra
  Cc: Yu-Hsuan Hsu, linux-kernel, Tzung-Bi Shih, Cheng-Yi Chiang,
	Guenter Roeck, Liam Girdwood, Mark Brown, Jaroslav Kysela,
	Takashi Iwai, Benson Leung, ALSA development

On Thu, Jul 16, 2020 at 10:47 AM Enric Balletbo i Serra
<enric.balletbo@collabora.com> wrote:
>
> Hi,
>
> On 16/7/20 19:23, Guenter Roeck wrote:
> > On Thu, Jul 16, 2020 at 10:09 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
> >>
> >> 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>
> >> ---
> >>  drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
> >>  include/linux/platform_data/cros_ec_commands.h | 1 +
> >>  sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
> >>  3 files changed, 16 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
> >> index 3e745e0fe092c..2c60690d7147c 100644
> >> --- a/drivers/platform/chrome/cros_ec_proto.c
> >> +++ b/drivers/platform/chrome/cros_ec_proto.c
> >> @@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
> >>                 return -ENOTSUPP;
> >>         } else if (msg->result != EC_RES_SUCCESS) {
> >>                 dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
> >> -               return -EPROTO;
> >> +               switch (msg->result) {
> >> +               case EC_RES_INVALID_PARAM:
> >> +                       return -EINVAL;
> >
> > As we have learned, this may impact other callers of
> > cros_ec_cmd_xfer_status() which only accept -EPROTO as error return
> > value. In addition to that, the code is odd:
> >
> >     if (msg->result == EC_RES_INVALID_VERSION) {
> >         ...
> >     } else if (msg->result != EC_RES_SUCCESS) {
> >         switch (msg->result) {
> >         ....
> >         }
> >     }
> >
>
> Ack, this is odd.
>
> > I really dislike the notion of changing error return values of
> > cros_ec_cmd_xfer_status() one by one. That can only cause ongoing
> > trouble with callers expecting specific error return codes (as we have
> > already seen).
> >
>
> Hmm, that's a good point. Ok.
>
> Let's apply the Guenter's patch that maps the errors *and* fix the callers of
> cros_ec_cmd_xfer_status which only accept -EPROTO (there are few).
>
> Yu-Hsuan, can you take care of this and send a patch series with all the
> required patches? If not, I can work on this next week.
>

I can look into it as well. Let me know - I don't want to duplicate work.

Guenter

> Thanks,
>   Enric
>
> > Guenter
> >
> >> +               default:
> >> +                       return -EPROTO;
> >> +               }
> >>         }
> >>
> >>         return ret;
> >> diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
> >> index 69210881ebac8..11ce917ca924c 100644
> >> --- a/include/linux/platform_data/cros_ec_commands.h
> >> +++ b/include/linux/platform_data/cros_ec_commands.h
> >> @@ -4598,6 +4598,7 @@ 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,
> >>  };
> >>
> >> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
> >> index f23956cf4ed84..b5ff30b7f1aa8 100644
> >> --- a/sound/soc/codecs/cros_ec_codec.c
> >> +++ b/sound/soc/codecs/cros_ec_codec.c
> >> @@ -1034,6 +1034,15 @@ 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 == -EINVAL)
> >> +               dev_info(dev, "Missing reset command. Please update your 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,
> >> --
> >> 2.27.0.389.gc38d7665816-goog
> >>

^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
@ 2020-07-17 14:32       ` Guenter Roeck
  0 siblings, 0 replies; 12+ messages in thread
From: Guenter Roeck @ 2020-07-17 14:32 UTC (permalink / raw)
  To: Enric Balletbo i Serra
  Cc: ALSA development, linux-kernel, Takashi Iwai, Liam Girdwood,
	Yu-Hsuan Hsu, Tzung-Bi Shih, Mark Brown, Guenter Roeck,
	Benson Leung, Cheng-Yi Chiang

On Thu, Jul 16, 2020 at 10:47 AM Enric Balletbo i Serra
<enric.balletbo@collabora.com> wrote:
>
> Hi,
>
> On 16/7/20 19:23, Guenter Roeck wrote:
> > On Thu, Jul 16, 2020 at 10:09 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
> >>
> >> 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>
> >> ---
> >>  drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
> >>  include/linux/platform_data/cros_ec_commands.h | 1 +
> >>  sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
> >>  3 files changed, 16 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
> >> index 3e745e0fe092c..2c60690d7147c 100644
> >> --- a/drivers/platform/chrome/cros_ec_proto.c
> >> +++ b/drivers/platform/chrome/cros_ec_proto.c
> >> @@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
> >>                 return -ENOTSUPP;
> >>         } else if (msg->result != EC_RES_SUCCESS) {
> >>                 dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
> >> -               return -EPROTO;
> >> +               switch (msg->result) {
> >> +               case EC_RES_INVALID_PARAM:
> >> +                       return -EINVAL;
> >
> > As we have learned, this may impact other callers of
> > cros_ec_cmd_xfer_status() which only accept -EPROTO as error return
> > value. In addition to that, the code is odd:
> >
> >     if (msg->result == EC_RES_INVALID_VERSION) {
> >         ...
> >     } else if (msg->result != EC_RES_SUCCESS) {
> >         switch (msg->result) {
> >         ....
> >         }
> >     }
> >
>
> Ack, this is odd.
>
> > I really dislike the notion of changing error return values of
> > cros_ec_cmd_xfer_status() one by one. That can only cause ongoing
> > trouble with callers expecting specific error return codes (as we have
> > already seen).
> >
>
> Hmm, that's a good point. Ok.
>
> Let's apply the Guenter's patch that maps the errors *and* fix the callers of
> cros_ec_cmd_xfer_status which only accept -EPROTO (there are few).
>
> Yu-Hsuan, can you take care of this and send a patch series with all the
> required patches? If not, I can work on this next week.
>

I can look into it as well. Let me know - I don't want to duplicate work.

Guenter

> Thanks,
>   Enric
>
> > Guenter
> >
> >> +               default:
> >> +                       return -EPROTO;
> >> +               }
> >>         }
> >>
> >>         return ret;
> >> diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
> >> index 69210881ebac8..11ce917ca924c 100644
> >> --- a/include/linux/platform_data/cros_ec_commands.h
> >> +++ b/include/linux/platform_data/cros_ec_commands.h
> >> @@ -4598,6 +4598,7 @@ 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,
> >>  };
> >>
> >> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
> >> index f23956cf4ed84..b5ff30b7f1aa8 100644
> >> --- a/sound/soc/codecs/cros_ec_codec.c
> >> +++ b/sound/soc/codecs/cros_ec_codec.c
> >> @@ -1034,6 +1034,15 @@ 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 == -EINVAL)
> >> +               dev_info(dev, "Missing reset command. Please update your 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,
> >> --
> >> 2.27.0.389.gc38d7665816-goog
> >>

^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
  2020-07-17 14:32       ` Guenter Roeck
@ 2020-07-17 18:51         ` Yu-Hsuan Hsu
  -1 siblings, 0 replies; 12+ messages in thread
From: Yu-Hsuan Hsu @ 2020-07-17 18:51 UTC (permalink / raw)
  To: Guenter Roeck
  Cc: Enric Balletbo i Serra, linux-kernel, Tzung-Bi Shih,
	Cheng-Yi Chiang, Guenter Roeck, Liam Girdwood, Mark Brown,
	Jaroslav Kysela, Takashi Iwai, Benson Leung, ALSA development

Guenter Roeck <groeck@google.com> 於 2020年7月17日 週五 下午10:32寫道：
>
> On Thu, Jul 16, 2020 at 10:47 AM Enric Balletbo i Serra
> <enric.balletbo@collabora.com> wrote:
> >
> > Hi,
> >
> > On 16/7/20 19:23, Guenter Roeck wrote:
> > > On Thu, Jul 16, 2020 at 10:09 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
> > >>
> > >> 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>
> > >> ---
> > >>  drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
> > >>  include/linux/platform_data/cros_ec_commands.h | 1 +
> > >>  sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
> > >>  3 files changed, 16 insertions(+), 1 deletion(-)
> > >>
> > >> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
> > >> index 3e745e0fe092c..2c60690d7147c 100644
> > >> --- a/drivers/platform/chrome/cros_ec_proto.c
> > >> +++ b/drivers/platform/chrome/cros_ec_proto.c
> > >> @@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
> > >>                 return -ENOTSUPP;
> > >>         } else if (msg->result != EC_RES_SUCCESS) {
> > >>                 dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
> > >> -               return -EPROTO;
> > >> +               switch (msg->result) {
> > >> +               case EC_RES_INVALID_PARAM:
> > >> +                       return -EINVAL;
> > >
> > > As we have learned, this may impact other callers of
> > > cros_ec_cmd_xfer_status() which only accept -EPROTO as error return
> > > value. In addition to that, the code is odd:
> > >
> > >     if (msg->result == EC_RES_INVALID_VERSION) {
> > >         ...
> > >     } else if (msg->result != EC_RES_SUCCESS) {
> > >         switch (msg->result) {
> > >         ....
> > >         }
> > >     }
> > >
> >
> > Ack, this is odd.
> >
> > > I really dislike the notion of changing error return values of
> > > cros_ec_cmd_xfer_status() one by one. That can only cause ongoing
> > > trouble with callers expecting specific error return codes (as we have
> > > already seen).
> > >
> >
> > Hmm, that's a good point. Ok.
> >
> > Let's apply the Guenter's patch that maps the errors *and* fix the callers of
> > cros_ec_cmd_xfer_status which only accept -EPROTO (there are few).
> >
> > Yu-Hsuan, can you take care of this and send a patch series with all the
> > required patches? If not, I can work on this next week.
> >
>
> I can look into it as well. Let me know - I don't want to duplicate work.
>
> Guenter
Hi Guenter,
Really thanks for your assistance! Could you help me on those patches?
Since you wrote that patch, I think it should be the most efficient
way to make them merged.

Thanks,
Yu-Hsuan

>
> > Thanks,
> >   Enric
> >
> > > Guenter
> > >
> > >> +               default:
> > >> +                       return -EPROTO;
> > >> +               }
> > >>         }
> > >>
> > >>         return ret;
> > >> diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
> > >> index 69210881ebac8..11ce917ca924c 100644
> > >> --- a/include/linux/platform_data/cros_ec_commands.h
> > >> +++ b/include/linux/platform_data/cros_ec_commands.h
> > >> @@ -4598,6 +4598,7 @@ 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,
> > >>  };
> > >>
> > >> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
> > >> index f23956cf4ed84..b5ff30b7f1aa8 100644
> > >> --- a/sound/soc/codecs/cros_ec_codec.c
> > >> +++ b/sound/soc/codecs/cros_ec_codec.c
> > >> @@ -1034,6 +1034,15 @@ 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 == -EINVAL)
> > >> +               dev_info(dev, "Missing reset command. Please update your 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,
> > >> --
> > >> 2.27.0.389.gc38d7665816-goog
> > >>

^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
@ 2020-07-17 18:51         ` Yu-Hsuan Hsu
  0 siblings, 0 replies; 12+ messages in thread
From: Yu-Hsuan Hsu @ 2020-07-17 18:51 UTC (permalink / raw)
  To: Guenter Roeck
  Cc: ALSA development, Takashi Iwai, Liam Girdwood, linux-kernel,
	Tzung-Bi Shih, Mark Brown, Enric Balletbo i Serra, Guenter Roeck,
	Benson Leung, Cheng-Yi Chiang

Guenter Roeck <groeck@google.com> 於 2020年7月17日 週五 下午10:32寫道：
>
> On Thu, Jul 16, 2020 at 10:47 AM Enric Balletbo i Serra
> <enric.balletbo@collabora.com> wrote:
> >
> > Hi,
> >
> > On 16/7/20 19:23, Guenter Roeck wrote:
> > > On Thu, Jul 16, 2020 at 10:09 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
> > >>
> > >> 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>
> > >> ---
> > >>  drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
> > >>  include/linux/platform_data/cros_ec_commands.h | 1 +
> > >>  sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
> > >>  3 files changed, 16 insertions(+), 1 deletion(-)
> > >>
> > >> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
> > >> index 3e745e0fe092c..2c60690d7147c 100644
> > >> --- a/drivers/platform/chrome/cros_ec_proto.c
> > >> +++ b/drivers/platform/chrome/cros_ec_proto.c
> > >> @@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
> > >>                 return -ENOTSUPP;
> > >>         } else if (msg->result != EC_RES_SUCCESS) {
> > >>                 dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
> > >> -               return -EPROTO;
> > >> +               switch (msg->result) {
> > >> +               case EC_RES_INVALID_PARAM:
> > >> +                       return -EINVAL;
> > >
> > > As we have learned, this may impact other callers of
> > > cros_ec_cmd_xfer_status() which only accept -EPROTO as error return
> > > value. In addition to that, the code is odd:
> > >
> > >     if (msg->result == EC_RES_INVALID_VERSION) {
> > >         ...
> > >     } else if (msg->result != EC_RES_SUCCESS) {
> > >         switch (msg->result) {
> > >         ....
> > >         }
> > >     }
> > >
> >
> > Ack, this is odd.
> >
> > > I really dislike the notion of changing error return values of
> > > cros_ec_cmd_xfer_status() one by one. That can only cause ongoing
> > > trouble with callers expecting specific error return codes (as we have
> > > already seen).
> > >
> >
> > Hmm, that's a good point. Ok.
> >
> > Let's apply the Guenter's patch that maps the errors *and* fix the callers of
> > cros_ec_cmd_xfer_status which only accept -EPROTO (there are few).
> >
> > Yu-Hsuan, can you take care of this and send a patch series with all the
> > required patches? If not, I can work on this next week.
> >
>
> I can look into it as well. Let me know - I don't want to duplicate work.
>
> Guenter
Hi Guenter,
Really thanks for your assistance! Could you help me on those patches?
Since you wrote that patch, I think it should be the most efficient
way to make them merged.

Thanks,
Yu-Hsuan

>
> > Thanks,
> >   Enric
> >
> > > Guenter
> > >
> > >> +               default:
> > >> +                       return -EPROTO;
> > >> +               }
> > >>         }
> > >>
> > >>         return ret;
> > >> diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
> > >> index 69210881ebac8..11ce917ca924c 100644
> > >> --- a/include/linux/platform_data/cros_ec_commands.h
> > >> +++ b/include/linux/platform_data/cros_ec_commands.h
> > >> @@ -4598,6 +4598,7 @@ 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,
> > >>  };
> > >>
> > >> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
> > >> index f23956cf4ed84..b5ff30b7f1aa8 100644
> > >> --- a/sound/soc/codecs/cros_ec_codec.c
> > >> +++ b/sound/soc/codecs/cros_ec_codec.c
> > >> @@ -1034,6 +1034,15 @@ 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 == -EINVAL)
> > >> +               dev_info(dev, "Missing reset command. Please update your 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,
> > >> --
> > >> 2.27.0.389.gc38d7665816-goog
> > >>

^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
  2020-07-17 18:51         ` Yu-Hsuan Hsu
@ 2020-07-19 19:47           ` Guenter Roeck
  -1 siblings, 0 replies; 12+ messages in thread
From: Guenter Roeck @ 2020-07-19 19:47 UTC (permalink / raw)
  To: Yu-Hsuan Hsu
  Cc: Enric Balletbo i Serra, linux-kernel, Tzung-Bi Shih,
	Cheng-Yi Chiang, Guenter Roeck, Liam Girdwood, Mark Brown,
	Jaroslav Kysela, Takashi Iwai, Benson Leung, ALSA development

On Fri, Jul 17, 2020 at 11:51 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
>
> Guenter Roeck <groeck@google.com> 於 2020年7月17日 週五 下午10:32寫道：
> >
> > On Thu, Jul 16, 2020 at 10:47 AM Enric Balletbo i Serra
> > <enric.balletbo@collabora.com> wrote:
> > >
> > > Hi,
> > >
> > > On 16/7/20 19:23, Guenter Roeck wrote:
> > > > On Thu, Jul 16, 2020 at 10:09 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
> > > >>
> > > >> 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>
> > > >> ---
> > > >>  drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
> > > >>  include/linux/platform_data/cros_ec_commands.h | 1 +
> > > >>  sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
> > > >>  3 files changed, 16 insertions(+), 1 deletion(-)
> > > >>
> > > >> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
> > > >> index 3e745e0fe092c..2c60690d7147c 100644
> > > >> --- a/drivers/platform/chrome/cros_ec_proto.c
> > > >> +++ b/drivers/platform/chrome/cros_ec_proto.c
> > > >> @@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
> > > >>                 return -ENOTSUPP;
> > > >>         } else if (msg->result != EC_RES_SUCCESS) {
> > > >>                 dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
> > > >> -               return -EPROTO;
> > > >> +               switch (msg->result) {
> > > >> +               case EC_RES_INVALID_PARAM:
> > > >> +                       return -EINVAL;
> > > >
> > > > As we have learned, this may impact other callers of
> > > > cros_ec_cmd_xfer_status() which only accept -EPROTO as error return
> > > > value. In addition to that, the code is odd:
> > > >
> > > >     if (msg->result == EC_RES_INVALID_VERSION) {
> > > >         ...
> > > >     } else if (msg->result != EC_RES_SUCCESS) {
> > > >         switch (msg->result) {
> > > >         ....
> > > >         }
> > > >     }
> > > >
> > >
> > > Ack, this is odd.
> > >
> > > > I really dislike the notion of changing error return values of
> > > > cros_ec_cmd_xfer_status() one by one. That can only cause ongoing
> > > > trouble with callers expecting specific error return codes (as we have
> > > > already seen).
> > > >
> > >
> > > Hmm, that's a good point. Ok.
> > >
> > > Let's apply the Guenter's patch that maps the errors *and* fix the callers of
> > > cros_ec_cmd_xfer_status which only accept -EPROTO (there are few).
> > >
> > > Yu-Hsuan, can you take care of this and send a patch series with all the
> > > required patches? If not, I can work on this next week.
> > >
> >
> > I can look into it as well. Let me know - I don't want to duplicate work.
> >
> > Guenter
> Hi Guenter,
> Really thanks for your assistance! Could you help me on those patches?
> Since you wrote that patch, I think it should be the most efficient
> way to make them merged.
>

Untested patch series is at crrev.com/c/2306731. I'll try to get a
successful CQ pass with both chromeos-5.4 and chromeos-4.19 and submit
the relevant patches upstream after it passes.

Guenter

> Thanks,
> Yu-Hsuan
>
> >
> > > Thanks,
> > >   Enric
> > >
> > > > Guenter
> > > >
> > > >> +               default:
> > > >> +                       return -EPROTO;
> > > >> +               }
> > > >>         }
> > > >>
> > > >>         return ret;
> > > >> diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
> > > >> index 69210881ebac8..11ce917ca924c 100644
> > > >> --- a/include/linux/platform_data/cros_ec_commands.h
> > > >> +++ b/include/linux/platform_data/cros_ec_commands.h
> > > >> @@ -4598,6 +4598,7 @@ 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,
> > > >>  };
> > > >>
> > > >> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
> > > >> index f23956cf4ed84..b5ff30b7f1aa8 100644
> > > >> --- a/sound/soc/codecs/cros_ec_codec.c
> > > >> +++ b/sound/soc/codecs/cros_ec_codec.c
> > > >> @@ -1034,6 +1034,15 @@ 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 == -EINVAL)
> > > >> +               dev_info(dev, "Missing reset command. Please update your 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,
> > > >> --
> > > >> 2.27.0.389.gc38d7665816-goog
> > > >>

^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing
@ 2020-07-19 19:47           ` Guenter Roeck
  0 siblings, 0 replies; 12+ messages in thread
From: Guenter Roeck @ 2020-07-19 19:47 UTC (permalink / raw)
  To: Yu-Hsuan Hsu
  Cc: ALSA development, Takashi Iwai, Liam Girdwood, linux-kernel,
	Tzung-Bi Shih, Mark Brown, Enric Balletbo i Serra, Guenter Roeck,
	Benson Leung, Cheng-Yi Chiang

On Fri, Jul 17, 2020 at 11:51 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
>
> Guenter Roeck <groeck@google.com> 於 2020年7月17日 週五 下午10:32寫道：
> >
> > On Thu, Jul 16, 2020 at 10:47 AM Enric Balletbo i Serra
> > <enric.balletbo@collabora.com> wrote:
> > >
> > > Hi,
> > >
> > > On 16/7/20 19:23, Guenter Roeck wrote:
> > > > On Thu, Jul 16, 2020 at 10:09 AM Yu-Hsuan Hsu <yuhsuan@chromium.org> wrote:
> > > >>
> > > >> 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>
> > > >> ---
> > > >>  drivers/platform/chrome/cros_ec_proto.c        | 7 ++++++-
> > > >>  include/linux/platform_data/cros_ec_commands.h | 1 +
> > > >>  sound/soc/codecs/cros_ec_codec.c               | 9 +++++++++
> > > >>  3 files changed, 16 insertions(+), 1 deletion(-)
> > > >>
> > > >> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
> > > >> index 3e745e0fe092c..2c60690d7147c 100644
> > > >> --- a/drivers/platform/chrome/cros_ec_proto.c
> > > >> +++ b/drivers/platform/chrome/cros_ec_proto.c
> > > >> @@ -572,7 +572,12 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
> > > >>                 return -ENOTSUPP;
> > > >>         } else if (msg->result != EC_RES_SUCCESS) {
> > > >>                 dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
> > > >> -               return -EPROTO;
> > > >> +               switch (msg->result) {
> > > >> +               case EC_RES_INVALID_PARAM:
> > > >> +                       return -EINVAL;
> > > >
> > > > As we have learned, this may impact other callers of
> > > > cros_ec_cmd_xfer_status() which only accept -EPROTO as error return
> > > > value. In addition to that, the code is odd:
> > > >
> > > >     if (msg->result == EC_RES_INVALID_VERSION) {
> > > >         ...
> > > >     } else if (msg->result != EC_RES_SUCCESS) {
> > > >         switch (msg->result) {
> > > >         ....
> > > >         }
> > > >     }
> > > >
> > >
> > > Ack, this is odd.
> > >
> > > > I really dislike the notion of changing error return values of
> > > > cros_ec_cmd_xfer_status() one by one. That can only cause ongoing
> > > > trouble with callers expecting specific error return codes (as we have
> > > > already seen).
> > > >
> > >
> > > Hmm, that's a good point. Ok.
> > >
> > > Let's apply the Guenter's patch that maps the errors *and* fix the callers of
> > > cros_ec_cmd_xfer_status which only accept -EPROTO (there are few).
> > >
> > > Yu-Hsuan, can you take care of this and send a patch series with all the
> > > required patches? If not, I can work on this next week.
> > >
> >
> > I can look into it as well. Let me know - I don't want to duplicate work.
> >
> > Guenter
> Hi Guenter,
> Really thanks for your assistance! Could you help me on those patches?
> Since you wrote that patch, I think it should be the most efficient
> way to make them merged.
>

Untested patch series is at crrev.com/c/2306731. I'll try to get a
successful CQ pass with both chromeos-5.4 and chromeos-4.19 and submit
the relevant patches upstream after it passes.

Guenter

> Thanks,
> Yu-Hsuan
>
> >
> > > Thanks,
> > >   Enric
> > >
> > > > Guenter
> > > >
> > > >> +               default:
> > > >> +                       return -EPROTO;
> > > >> +               }
> > > >>         }
> > > >>
> > > >>         return ret;
> > > >> diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
> > > >> index 69210881ebac8..11ce917ca924c 100644
> > > >> --- a/include/linux/platform_data/cros_ec_commands.h
> > > >> +++ b/include/linux/platform_data/cros_ec_commands.h
> > > >> @@ -4598,6 +4598,7 @@ 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,
> > > >>  };
> > > >>
> > > >> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
> > > >> index f23956cf4ed84..b5ff30b7f1aa8 100644
> > > >> --- a/sound/soc/codecs/cros_ec_codec.c
> > > >> +++ b/sound/soc/codecs/cros_ec_codec.c
> > > >> @@ -1034,6 +1034,15 @@ 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 == -EINVAL)
> > > >> +               dev_info(dev, "Missing reset command. Please update your 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,
> > > >> --
> > > >> 2.27.0.389.gc38d7665816-goog
> > > >>

^ permalink raw reply	[flat|nested] 12+ messages in thread
end of thread, other threads:[~2020-07-19 19:49 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-16 17:09 [PATCH v2] ASoC: cros_ec_codec: Reset I2S RX when probing Yu-Hsuan Hsu
2020-07-16 17:09 ` Yu-Hsuan Hsu
2020-07-16 17:23 ` Guenter Roeck
2020-07-16 17:23   ` Guenter Roeck
2020-07-16 17:47   ` Enric Balletbo i Serra
2020-07-16 17:47     ` Enric Balletbo i Serra
2020-07-17 14:32     ` Guenter Roeck
2020-07-17 14:32       ` Guenter Roeck
2020-07-17 18:51       ` Yu-Hsuan Hsu
2020-07-17 18:51         ` Yu-Hsuan Hsu
2020-07-19 19:47         ` Guenter Roeck
2020-07-19 19:47           ` Guenter Roeck

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