linux-kernel - Re: [PATCH v3 17/19] media: venus: pm_helpers: Commonize vdec

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Message-ID: <179c0396-8d90-7f4b-359a-cf451346fb7a@quicinc.com>
Date: Thu, 25 Apr 2024 18:17:26 +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 v3 17/19] media: venus: pm_helpers: Commonize vdec_get()



On 3/27/2024 11:38 PM, Konrad Dybcio wrote:
> This function can be very easily commonized between the supported gens.
> Do so!
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>  drivers/media/platform/qcom/venus/pm_helpers.c | 22 ++--------------------
>  drivers/media/platform/qcom/venus/pm_helpers.h |  2 +-
>  drivers/media/platform/qcom/venus/vdec.c       |  9 +++++++--
>  3 files changed, 10 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c
> index ba5199d9e5c9..3818384bae10 100644
> --- a/drivers/media/platform/qcom/venus/pm_helpers.c
> +++ b/drivers/media/platform/qcom/venus/pm_helpers.c
> @@ -125,7 +125,7 @@ static int core_clks_set_rate(struct venus_core *core, unsigned long freq)
>  	return 0;
>  }
>  
> -static int vcodec_clks_get(struct venus_core *core, struct device *dev, u8 id)
> +int vcodec_clks_get(struct venus_core *core, struct device *dev, u8 id)
>  {
>  	char buf[13] = { 0 }; /* vcodecX_core\0 */
>  
> @@ -158,6 +158,7 @@ static int vcodec_clks_get(struct venus_core *core, struct device *dev, u8 id)
>  
>  	return 0;
>  }
> +EXPORT_SYMBOL_GPL(vcodec_clks_get);
>  
>  static int vcodec_clks_enable(struct venus_core *core, u8 id)
>  {
> @@ -345,13 +346,6 @@ vcodec_control_v3(struct venus_core *core, u32 session_type, bool enable)
>  		writel(1, ctrl);
>  }
>  
> -static int vdec_get_v3(struct device *dev)
> -{
> -	struct venus_core *core = dev_get_drvdata(dev);
> -
> -	return vcodec_clks_get(core, dev, 0);
> -}
> -
>  static int vdec_power_v3(struct device *dev, int on)
>  {
>  	struct venus_core *core = dev_get_drvdata(dev);
> @@ -394,7 +388,6 @@ static int venc_power_v3(struct device *dev, int on)
>  }
>  
>  static const struct venus_pm_ops pm_ops_v3 = {
> -	.vdec_get = vdec_get_v3,
>  	.vdec_power = vdec_power_v3,
>  	.venc_get = venc_get_v3,
>  	.venc_power = venc_power_v3,
> @@ -759,16 +752,6 @@ static int coreid_power_v4(struct venus_inst *inst, int on)
>  	return ret;
>  }
>  
> -static int vdec_get_v4(struct device *dev)
> -{
> -	struct venus_core *core = dev_get_drvdata(dev);
> -
> -	if (!legacy_binding)
> -		return 0;
> -
> -	return vcodec_clks_get(core, dev, 0);
> -}
> -
>  static void vdec_put_v4(struct device *dev)
>  {
>  	struct venus_core *core = dev_get_drvdata(dev);
> @@ -1107,7 +1090,6 @@ static int load_scale_v4(struct venus_inst *inst)
>  }
>  
>  static const struct venus_pm_ops pm_ops_v4 = {
> -	.vdec_get = vdec_get_v4,
>  	.vdec_put = vdec_put_v4,
>  	.vdec_power = vdec_power_v4,
>  	.venc_get = venc_get_v4,
> diff --git a/drivers/media/platform/qcom/venus/pm_helpers.h b/drivers/media/platform/qcom/venus/pm_helpers.h
> index 7a55a55029f3..4afc57dac865 100644
> --- a/drivers/media/platform/qcom/venus/pm_helpers.h
> +++ b/drivers/media/platform/qcom/venus/pm_helpers.h
> @@ -10,7 +10,6 @@ struct venus_core;
>  #define POWER_OFF	0
>  
>  struct venus_pm_ops {
> -	int (*vdec_get)(struct device *dev);
>  	void (*vdec_put)(struct device *dev);
>  	int (*vdec_power)(struct device *dev, int on);
>  
> @@ -27,6 +26,7 @@ const struct venus_pm_ops *venus_pm_get(enum hfi_version version);
>  int venus_core_power(struct venus_core *core, int on);
>  void vcodec_domains_put(struct venus_core *core);
>  int venus_get_resources(struct venus_core *core);
> +int vcodec_clks_get(struct venus_core *core, struct device *dev, u8 id);
>  
>  static inline int venus_pm_load_scale(struct venus_inst *inst)
>  {
> diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
> index 29130a9441e7..d127311100cd 100644
> --- a/drivers/media/platform/qcom/venus/vdec.c
> +++ b/drivers/media/platform/qcom/venus/vdec.c
> @@ -1788,8 +1788,13 @@ static int vdec_probe(struct platform_device *pdev)
>  
>  	platform_set_drvdata(pdev, core);
>  
> -	if (core->pm_ops->vdec_get) {
> -		ret = core->pm_ops->vdec_get(dev);
> +	/*
> +	 * If the vcodec core clock is missing by now, it either doesn't exist
> +	 * (8916) or deprecated bindings with pre-assigned core functions and
> +	 * resources under the decoder node are in use.
> +	 */
This comment is not very clear to me, could you please elaborate more on
"deprecated bindings with pre-assigned core functions and
 resources under the decoder node are in use"
> +	if (!core->vcodec_core_clks[0]) {
> +		ret = vcodec_clks_get(core, dev, 0);
>  		if (ret)
>  			return ret;
>  	}
> 
Calling vcodec_clks_get directly instead of vdec_get op looks fine to me,
but this depends on the previous patch, so will need some changes.

Thanks,
Dikshita