linux-kernel - Re: [PATCH 1/2] slimbus: stream: handle unsupported bitrates for presence rate

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Date:   Fri, 30 Sep 2022 11:32:01 +0200
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] slimbus: stream: handle unsupported bitrates for
 presence rate



On 30.09.2022 11:20, Krzysztof Kozlowski wrote:
> Handle errors of getting presence rate for unsupported stream bitrate,
> instead of sending -EINVAL in change content message.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@...ainline.org>

Konrad
>  drivers/slimbus/stream.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/slimbus/stream.c b/drivers/slimbus/stream.c
> index f8eade1e0132..28fbecb3907d 100644
> --- a/drivers/slimbus/stream.c
> +++ b/drivers/slimbus/stream.c
> @@ -204,7 +204,7 @@ int slim_stream_prepare(struct slim_stream_runtime *rt,
>  {
>  	struct slim_controller *ctrl = rt->dev->ctrl;
>  	struct slim_port *port;
> -	int num_ports, i, port_id;
> +	int num_ports, i, port_id, prrate;
>  
>  	pr_err("%s:%d AAAA\n", __func__, __LINE__);
>  	if (rt->ports) {
> @@ -222,6 +222,13 @@ int slim_stream_prepare(struct slim_stream_runtime *rt,
>  	rt->bps = cfg->bps;
>  	rt->direction = cfg->direction;
>  
> +	prrate = slim_get_prate_code(cfg->rate);
> +	if (prrate < 0) {
> +		dev_err(&rt->dev->dev, "Cannot get presence rate for rate %d Hz\n",
> +			cfg->rate);
> +		return -EINVAL;
> +	}
> +
>  	if (cfg->rate % ctrl->a_framer->superfreq) {
>  		/*
>  		 * data rate not exactly multiple of super frame,
> @@ -242,7 +249,7 @@ int slim_stream_prepare(struct slim_stream_runtime *rt,
>  		port = &rt->ports[i];
>  		port->state = SLIM_PORT_DISCONNECTED;
>  		port->id = port_id;
> -		port->ch.prrate = slim_get_prate_code(cfg->rate);
> +		port->ch.prrate = prrate;
>  		port->ch.id = cfg->chs[i];
>  		port->ch.data_fmt = SLIM_CH_DATA_FMT_NOT_DEFINED;
>  		port->ch.aux_fmt = SLIM_CH_AUX_FMT_NOT_APPLICABLE;