Re: [PATCH v2 1/4] ASoC: qcom: q6core: expose ADSP core firmware version

[Srinivas Kandagatla <srinivas.kandagatla@linaro.org>]

Thanks Otto for the patches.

On 29/10/2023 16:57, Otto Pflüger wrote:
> Add a q6core_get_adsp_version() function that returns the version of the
> ADSP firmware (2.6, 2.7 or 2.8), also known as the AVS version (see [1]
> in downstream kernel).
> 
> Some APIs differ between these versions, e.g. the AFE clock APIs.
> 
> [1]: https://github.com/msm8916-mainline/linux-downstream/blob/LA.BR.1.2.9.1_rb1.5/sound/soc/msm/qdsp6v2/q6core.c#L193
> 
> Signed-off-by: Otto Pflüger <otto.pflueger@abscue.de>
> ---
>   sound/soc/qcom/qdsp6/q6core.c | 65 +++++++++++++++++++++++++++++++++++
>   sound/soc/qcom/qdsp6/q6core.h |  9 +++++
>   2 files changed, 74 insertions(+)
> 
> diff --git a/sound/soc/qcom/qdsp6/q6core.c b/sound/soc/qcom/qdsp6/q6core.c
> index 49cfb32cd209..855ab4ff1e59 100644
> --- a/sound/soc/qcom/qdsp6/q6core.c
> +++ b/sound/soc/qcom/qdsp6/q6core.c
> @@ -20,6 +20,9 @@
>   #define AVCS_CMDRSP_ADSP_EVENT_GET_STATE	0x0001290D
>   #define AVCS_GET_VERSIONS       0x00012905
>   #define AVCS_GET_VERSIONS_RSP   0x00012906
> +#define AVCS_CMDRSP_Q6_ID_2_6	0x00040000
> +#define AVCS_CMDRSP_Q6_ID_2_7	0x00040001
> +#define AVCS_CMDRSP_Q6_ID_2_8	0x00040002
>   #define AVCS_CMD_GET_FWK_VERSION	0x001292c
>   #define AVCS_CMDRSP_GET_FWK_VERSION	0x001292d
>   
> @@ -63,6 +66,7 @@ struct q6core {
>   	bool get_state_supported;
>   	bool get_version_supported;
>   	bool is_version_requested;
> +	enum q6core_version adsp_version;

May be rename this to just api_version would more readable than 
adsp_Version.

>   };
>   
>   static struct q6core *g_core;
> @@ -108,6 +112,14 @@ static int q6core_callback(struct apr_device *adev, struct apr_resp_pkt *data)
>   		if (!core->fwk_version)
>   			return -ENOMEM;
>   
> +		/*
> +		 * Since GET_VERSIONS is not called when GET_FWK_VERSION
> +		 * is successful and these commands may return completely
> +		 * different versions, assume that the version is 2.8 here.
> +		 * Older versions do not support GET_FWK_VERSION and we do
> +		 * not care if the version is newer than 2.8.
> +		 */
> +		core->adsp_version = Q6_ADSP_VERSION_2_8;
>   		core->fwk_version_supported = true;
>   		core->resp_received = true;
>   
> @@ -115,6 +127,7 @@ static int q6core_callback(struct apr_device *adev, struct apr_resp_pkt *data)
>   	}
>   	case AVCS_GET_VERSIONS_RSP: {
>   		struct avcs_cmdrsp_get_version *v;
> +		int i;
>   
>   		v = data->payload;
>   
> @@ -125,6 +138,32 @@ static int q6core_callback(struct apr_device *adev, struct apr_resp_pkt *data)
>   		if (!core->svc_version)
>   			return -ENOMEM;
>   
> +		for (i = 0; i < g_core->svc_version->num_services; i++) {

We have two places where the api info is stored based on adsp version, 
g_core->fwk_version->num_services and g_core->svc_version->num_services
this code is only going thru one list which will not work as expected in 
some revisions of the firmware.

> +			struct avcs_svc_info *info;
> +
> +			info = &g_core->svc_version->svc_api_info[i];
> +			if (info->service_id != APR_SVC_ADSP_CORE)
> +				continue;
> +
> +			switch (info->version) {
> +			case AVCS_CMDRSP_Q6_ID_2_6:
> +				core->adsp_version = Q6_ADSP_VERSION_2_6;
> +				break;
> +			case AVCS_CMDRSP_Q6_ID_2_7:
> +				core->adsp_version = Q6_ADSP_VERSION_2_7;
> +				break;
> +			case AVCS_CMDRSP_Q6_ID_2_8:
> +				core->adsp_version = Q6_ADSP_VERSION_2_8;
> +				break;
> +			default:
> +				dev_err(&adev->dev, "Unknown AVS version 0x%08x\n",
> +					info->version);


> +				break;
> +			}
> +
> +			break;
> +		}
> +
>   		core->get_version_supported = true;
>   		core->resp_received = true;
>   
> @@ -293,6 +332,31 @@ int q6core_get_svc_api_info(int svc_id, struct q6core_svc_api_info *ainfo)
>   }
>   EXPORT_SYMBOL_GPL(q6core_get_svc_api_info);
>   
> +/**
> + * q6core_get_adsp_version() - Get the core version number.
> + *
> + * Return: version code or Q6_ADSP_VERSION_UNKNOWN on failure
> + */
> +enum q6core_version q6core_get_adsp_version(void)
> +{
> +	int ret;
> +
> +	if (!g_core)
> +		return Q6_ADSP_VERSION_UNKNOWN;
> +
> +	mutex_lock(&g_core->lock);
> +	if (!g_core->is_version_requested) {
> +		if (q6core_get_fwk_versions(g_core) == -ENOTSUPP)
> +			q6core_get_svc_versions(g_core);
> +		g_core->is_version_requested = true;
> +	}
> +	ret = g_core->adsp_version;
> +	mutex_unlock(&g_core->lock);
> +
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(q6core_get_adsp_version);
> +
>   /**
>    * q6core_is_adsp_ready() - Get status of adsp
>    *
> @@ -334,6 +398,7 @@ static int q6core_probe(struct apr_device *adev)
>   	dev_set_drvdata(&adev->dev, g_core);
>   
>   	mutex_init(&g_core->lock);
> +	g_core->adsp_version = Q6_ADSP_VERSION_UNKNOWN;
>   	g_core->adev = adev;
>   	init_waitqueue_head(&g_core->wait);
>   	return 0;
> diff --git a/sound/soc/qcom/qdsp6/q6core.h b/sound/soc/qcom/qdsp6/q6core.h
> index 4105b1d730be..472e06bf8efc 100644
> --- a/sound/soc/qcom/qdsp6/q6core.h
> +++ b/sound/soc/qcom/qdsp6/q6core.h
> @@ -9,7 +9,16 @@ struct q6core_svc_api_info {
>   	uint32_t api_branch_version;
>   };
>   
> +/* Versions must be in order! */
> +enum q6core_version {
> +	Q6_ADSP_VERSION_UNKNOWN,
> +	Q6_ADSP_VERSION_2_6,
> +	Q6_ADSP_VERSION_2_7,
> +	Q6_ADSP_VERSION_2_8,
> +};
> +
>   bool q6core_is_adsp_ready(void);
> +enum q6core_version q6core_get_adsp_version(void);
>   int q6core_get_svc_api_info(int svc_id, struct q6core_svc_api_info *ainfo);
>   
>   #endif /* __Q6CORE_H__ */