linux-kernel - Re: [PATCH 4/8] remoteproc: qcom_q6v5

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Message-ID: <aVJhH17XH1srlroL@linaro.org>
Date: Mon, 29 Dec 2025 12:08:15 +0100
From: Stephan Gerhold <stephan.gerhold@...aro.org>
To: Barnabás Czémán <barnabas.czeman@...nlining.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Mathieu Poirier <mathieu.poirier@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Stephan Gerhold <stephan@...hold.net>,
	linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/8] remoteproc: qcom_q6v5_mss: Add MSM8917

On Sun, Dec 28, 2025 at 03:21:54PM +0100, Barnabás Czémán wrote:
> Add support for MSM8917 MSS it is similar for MDM9607 MSS
> only difference is the mss power domain.
> 
> Signed-off-by: Barnabás Czémán <barnabas.czeman@...nlining.org>
> ---
>  drivers/remoteproc/qcom_q6v5_mss.c | 46 ++++++++++++++++++++++++++++++++++++--
>  1 file changed, 44 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
> index ffafbe501a05..2579558fb567 100644
> --- a/drivers/remoteproc/qcom_q6v5_mss.c
> +++ b/drivers/remoteproc/qcom_q6v5_mss.c
> @@ -259,6 +259,7 @@ enum {
>  	MSS_MSM8226,
>  	MSS_MSM8909,
>  	MSS_MSM8916,
> +	MSS_MSM8917,
>  	MSS_MSM8926,
>  	MSS_MSM8953,
>  	MSS_MSM8974,
> @@ -749,13 +750,15 @@ static int q6v5proc_reset(struct q6v5 *qproc)
>  		goto pbl_wait;
>  	} else if (qproc->version == MSS_MDM9607 ||
>  		   qproc->version == MSS_MSM8909 ||
> +		   qproc->version == MSS_MSM8917 ||
>  		   qproc->version == MSS_MSM8953 ||
>  		   qproc->version == MSS_MSM8996 ||
>  		   qproc->version == MSS_MSM8998 ||
>  		   qproc->version == MSS_SDM660) {
>  
>  		/* Override the ACC value if required */
> -		if (qproc->version == MSS_MDM9607)
> +		if (qproc->version == MSS_MDM9607 ||
> +		    qproc->version == MSS_MSM8917)
>  			writel(QDSP6SS_ACC_OVERRIDE_VAL_9607,
>  			       qproc->reg_base + QDSP6SS_STRAP_ACC);
>  		else if (qproc->version != MSS_MSM8909 &&
> @@ -817,6 +820,7 @@ static int q6v5proc_reset(struct q6v5 *qproc)
>  
>  			/* Turn on L1, L2, ETB and JU memories 1 at a time */
>  			if (qproc->version == MSS_MDM9607 ||
> +			    qproc->version == MSS_MSM8917 ||
>  			    qproc->version == MSS_MSM8953 ||
>  			    qproc->version == MSS_MSM8996) {
>  				mem_pwr_ctl = QDSP6SS_MEM_PWR_CTL;
> @@ -826,7 +830,8 @@ static int q6v5proc_reset(struct q6v5 *qproc)
>  				 * Set first 5 bits in reverse to avoid
>  				 * "inrush current" issues.
>  				 */
> -				if (qproc->version == MSS_MDM9607)
> +				if (qproc->version == MSS_MDM9607 ||
> +				    qproc->version == MSS_MSM8917)
>  					reverse = 6;
>  			} else {
>  				/* MSS_MSM8998, MSS_SDM660 */
> @@ -2538,6 +2543,42 @@ static const struct rproc_hexagon_res msm8916_mss = {
>  	.version = MSS_MSM8916,
>  };
>  
> +static const struct rproc_hexagon_res msm8917_mss = {
> +	.hexagon_mba_image = "mba.mbn",
> +	.proxy_supply = (struct qcom_mss_reg_res[]) {
> +		{
> +			.supply = "pll",
> +			.uA = 100000,
> +		},
> +		{}
> +	},
> +	.proxy_clk_names = (char*[]){
> +		"xo",
> +		NULL
> +	},
> +	.active_clk_names = (char*[]){
> +		"iface",
> +		"bus",
> +		"mem",
> +		NULL
> +	},
> +	.proxy_pd_names = (char*[]) {
> +		"cx",
> +		"mx",
> +		"mss",

Are you sure mss/pm8937_s1 also works as a power domain? It seems to be
a plain regulator downstream (similar to msm8226/msm8974).

Same thing applies to MSM8953 as well though and there we seem to have
decided to model it as a power domain ...

> +		NULL
> +	},
> +	.need_mem_protection = false,
> +	.has_alt_reset = false,
> +	.has_mba_logs = false,
> +	.has_spare_reg = false,
> +	.has_qaccept_regs = false,
> +	.has_ext_bhs_reg = false,
> +	.has_ext_cntl_regs = false,
> +	.has_vq6 = false,
> +	.version = MSS_MSM8917,

You could set MSS_MDM9607 here to drop the extra diff above (but not
sure if that would be clearer).

Thanks,
Stephan