linux-kernel - Re: [PATCH v2 06/20] media: venus: pm_helpers: Move reset acquisition to common code

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Message-ID: <b3ec7faa-e059-d33e-4e4c-749c551e0097@quicinc.com>
Date: Mon, 4 Mar 2024 11:17:44 +0530
From: Dikshita Agarwal <quic_dikshita@...cinc.com>
To: Konrad Dybcio <konrad.dybcio@...aro.org>,
        Stanimir Varbanov
	<stanimir.k.varbanov@...il.com>,
        Vikash Garodia <quic_vgarodia@...cinc.com>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Andy Gross
	<agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        "Mauro Carvalho
 Chehab" <mchehab@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
CC: Marijn Suijten <marijn.suijten@...ainline.org>,
        Stanimir Varbanov
	<stanimir.varbanov@...aro.org>,
        Mauro Carvalho Chehab
	<mchehab+huawei@...nel.org>,
        <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 06/20] media: venus: pm_helpers: Move reset acquisition
 to common code



On 2/10/2024 2:39 AM, Konrad Dybcio wrote:
> There is no reason to keep reset_get code local to HFIv4/v6.
> 
> Move it to the common part.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>  drivers/media/platform/qcom/venus/core.c       |  9 ++++++++-
>  drivers/media/platform/qcom/venus/pm_helpers.c | 23 -----------------------
>  2 files changed, 8 insertions(+), 24 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
> index 5ab3c414ec0f..0652065cb113 100644
> --- a/drivers/media/platform/qcom/venus/core.c
> +++ b/drivers/media/platform/qcom/venus/core.c
> @@ -15,6 +15,7 @@
>  #include <linux/of_platform.h>
>  #include <linux/platform_device.h>
>  #include <linux/pm_opp.h>
> +#include <linux/reset.h>
>  #include <linux/slab.h>
>  #include <linux/types.h>
>  #include <linux/pm_domain.h>
> @@ -286,7 +287,7 @@ static int venus_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct venus_core *core;
> -	int ret;
> +	int i, ret;
>  
>  	core = devm_kzalloc(dev, sizeof(*core), GFP_KERNEL);
>  	if (!core)
> @@ -324,6 +325,12 @@ static int venus_probe(struct platform_device *pdev)
>  	if (ret)
>  		return ret;
>  
> +	for (i = 0; i < core->res->resets_num; i++) {
> +		core->resets[i] = devm_reset_control_get_exclusive(dev, core->res->resets[i]);
> +		if (IS_ERR(core->resets[i]))
> +			return PTR_ERR(core->resets[i]);
> +	}
> +
>  	if (core->pm_ops->core_get) {
>  		ret = core->pm_ops->core_get(core);
>  		if (ret)
> diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c
> index 7193075e8c04..6017a9236bff 100644
> --- a/drivers/media/platform/qcom/venus/pm_helpers.c
> +++ b/drivers/media/platform/qcom/venus/pm_helpers.c
> @@ -939,25 +939,6 @@ static int core_resets_reset(struct venus_core *core)
>  	return ret;
>  }
>  
> -static int core_resets_get(struct venus_core *core)
> -{
> -	struct device *dev = core->dev;
> -	const struct venus_resources *res = core->res;
> -	unsigned int i;
> -	int ret;
> -
> -	for (i = 0; i < res->resets_num; i++) {
> -		core->resets[i] =
> -			devm_reset_control_get_exclusive(dev, res->resets[i]);
> -		if (IS_ERR(core->resets[i])) {
> -			ret = PTR_ERR(core->resets[i]);
> -			return ret;
> -		}
> -	}
> -
> -	return 0;
> -}
> -
resets are applicable to only v6 so it should be ok to keep this only in
core_get_v4 which is invoked for v6 as well. common code should be common
for all SOCs.
>  static int core_get_v4(struct venus_core *core)
>  {
>  	struct device *dev = core->dev;
> @@ -981,10 +962,6 @@ static int core_get_v4(struct venus_core *core)
>  	if (ret)
>  		return ret;
>  
> -	ret = core_resets_get(core);
> -	if (ret)
> -		return ret;
> -
>  	if (legacy_binding)
>  		return 0;
>  
>