linux-kernel - Re: [PATCH v2 5/7] remoteproc: q6v5-mss: Active powerdomain for SDM845

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Date:   Wed, 09 Jan 2019 20:10:25 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Arun Kumar Neelakantam <aneela@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kernel-owner@...r.kernel.org
Subject: Re: [PATCH v2 5/7] remoteproc: q6v5-mss: Active powerdomain for
 SDM845

On 2019-01-06 13:39, Bjorn Andersson wrote:
> The SDM845 MSS needs the load_state powerdomain voted for during the
> duration of the MSS being powered on, to let the AOSS know that it may
> not perform certain power save measures. So vote for this.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
> 
> Changes since v1:
> - New patch
> 

Reviewed-by: Sibi Sankar <sibis@...eaurora.org>
Tested-by: Sibi Sankar <sibis@...eaurora.org>

>  drivers/remoteproc/qcom_q6v5_mss.c | 31 ++++++++++++++++++++++++++++--
>  1 file changed, 29 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/remoteproc/qcom_q6v5_mss.c
> b/drivers/remoteproc/qcom_q6v5_mss.c
> index 62cf16ddb7af..7f86d9c551c4 100644
> --- a/drivers/remoteproc/qcom_q6v5_mss.c
> +++ b/drivers/remoteproc/qcom_q6v5_mss.c
> @@ -133,6 +133,7 @@ struct rproc_hexagon_res {
>  	char **proxy_clk_names;
>  	char **reset_clk_names;
>  	char **active_clk_names;
> +	char **active_pd_names;
>  	char **proxy_pd_names;
>  	int version;
>  	bool need_mem_protection;
> @@ -159,10 +160,12 @@ struct q6v5 {
>  	struct clk *active_clks[8];
>  	struct clk *reset_clks[4];
>  	struct clk *proxy_clks[4];
> +	struct device *active_pds[1];
>  	struct device *proxy_pds[3];
>  	int active_clk_count;
>  	int reset_clk_count;
>  	int proxy_clk_count;
> +	int active_pd_count;
>  	int proxy_pd_count;
> 
>  	struct reg_info active_regs[1];
> @@ -730,10 +733,16 @@ static int q6v5_mba_load(struct q6v5 *qproc)
> 
>  	qcom_q6v5_prepare(&qproc->q6v5);
> 
> +	ret = q6v5_pds_enable(qproc, qproc->active_pds, 
> qproc->active_pd_count);
> +	if (ret < 0) {
> +		dev_err(qproc->dev, "failed to enable active power domains\n");
> +		goto disable_irqs;
> +	}
> +
>  	ret = q6v5_pds_enable(qproc, qproc->proxy_pds, 
> qproc->proxy_pd_count);
>  	if (ret < 0) {
>  		dev_err(qproc->dev, "failed to enable proxy power domains\n");
> -		goto disable_irqs;
> +		goto disable_active_pds;
>  	}
> 
>  	ret = q6v5_regulator_enable(qproc, qproc->proxy_regs,
> @@ -839,6 +848,8 @@ static int q6v5_mba_load(struct q6v5 *qproc)
>  			       qproc->proxy_reg_count);
>  disable_proxy_pds:
>  	q6v5_pds_disable(qproc, qproc->proxy_pds, qproc->proxy_pd_count);
> +disable_active_pds:
> +	q6v5_pds_disable(qproc, qproc->active_pds, qproc->active_pd_count);
>  disable_irqs:
>  	qcom_q6v5_unprepare(&qproc->q6v5);
> 
> @@ -878,6 +889,7 @@ static void q6v5_mba_reclaim(struct q6v5 *qproc)
>  			 qproc->active_clk_count);
>  	q6v5_regulator_disable(qproc, qproc->active_regs,
>  			       qproc->active_reg_count);
> +	q6v5_pds_disable(qproc, qproc->active_pds, qproc->active_pd_count);
> 
>  	/* In case of failure or coredump scenario where reclaiming MBA 
> memory
>  	 * could not happen reclaim it here.
> @@ -1410,11 +1422,19 @@ static int q6v5_probe(struct platform_device 
> *pdev)
>  	}
>  	qproc->active_reg_count = ret;
> 
> +	ret = q6v5_pds_attach(&pdev->dev, qproc->active_pds,
> +			      desc->active_pd_names);
> +	if (ret < 0) {
> +		dev_err(&pdev->dev, "Failed to attach active power domains\n");
> +		goto free_rproc;
> +	}
> +	qproc->active_pd_count = ret;
> +
>  	ret = q6v5_pds_attach(&pdev->dev, qproc->proxy_pds,
>  			      desc->proxy_pd_names);
>  	if (ret < 0) {
>  		dev_err(&pdev->dev, "Failed to init power domains\n");
> -		goto free_rproc;
> +		goto detach_active_pds;
>  	}
>  	qproc->proxy_pd_count = ret;
> 
> @@ -1446,6 +1466,8 @@ static int q6v5_probe(struct platform_device 
> *pdev)
> 
>  detach_proxy_pds:
>  	q6v5_pds_detach(qproc, qproc->proxy_pds, qproc->proxy_pd_count);
> +detach_active_pds:
> +	q6v5_pds_detach(qproc, qproc->active_pds, qproc->active_pd_count);
>  free_rproc:
>  	rproc_free(rproc);
> 
> @@ -1463,6 +1485,7 @@ static int q6v5_remove(struct platform_device 
> *pdev)
>  	qcom_remove_smd_subdev(qproc->rproc, &qproc->smd_subdev);
>  	qcom_remove_ssr_subdev(qproc->rproc, &qproc->ssr_subdev);
> 
> +	q6v5_pds_detach(qproc, qproc->active_pds, qproc->active_pd_count);
>  	q6v5_pds_detach(qproc, qproc->proxy_pds, qproc->proxy_pd_count);
> 
>  	rproc_free(qproc->rproc);
> @@ -1489,6 +1512,10 @@ static const struct rproc_hexagon_res sdm845_mss 
> = {
>  			"mnoc_axi",
>  			NULL
>  	},
> +	.active_pd_names = (char*[]){
> +			"load_state",
> +			NULL
> +	},
>  	.proxy_pd_names = (char*[]){
>  			"cx",
>  			"mx",

-- 
-- Sibi Sankar --
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project.