Re: [PATCH 04/13] media: qcom: camss: csiphy: Add an init callback to CSI PHY devices

[Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>]

On 7/9/24 19:06, Depeng Shao wrote:
> From: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> 
> Add a nop callback to CSIPHY devices. Later patches will enumerate with
> enabling code.

Please avoid references to "patches" in the commit messages, it'll be
changes.

I took a look at the next changes, and in my opinion the selected names
.init / csiphy_init() / csiphy->res->hw_ops->init(csiphy) are confusing,
since there is no intention for real hardware initialization, which is
presumed by "hw_ops->init()", I see only routines to get some offsets
and populate allocated memory with some values... Not closely a hw_ops.

> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> Signed-off-by: Depeng Shao <quic_depengs@quicinc.com>
> Reviewed-by: Elliot Berman <quic_eberman@quicinc.com>
> ---
>   drivers/media/platform/qcom/camss/camss-csiphy-2ph-1-0.c | 6 ++++++
>   drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c | 6 ++++++
>   drivers/media/platform/qcom/camss/camss-csiphy.c         | 4 ++++
>   drivers/media/platform/qcom/camss/camss-csiphy.h         | 1 +
>   4 files changed, 17 insertions(+)
> 
> diff --git a/drivers/media/platform/qcom/camss/camss-csiphy-2ph-1-0.c b/drivers/media/platform/qcom/camss/camss-csiphy-2ph-1-0.c
> index cd4a8c369234..9d67e7fa6366 100644
> --- a/drivers/media/platform/qcom/camss/camss-csiphy-2ph-1-0.c
> +++ b/drivers/media/platform/qcom/camss/camss-csiphy-2ph-1-0.c
> @@ -180,6 +180,11 @@ static irqreturn_t csiphy_isr(int irq, void *dev)
>   	return IRQ_HANDLED;
>   }
>   
> +static int csiphy_init(struct csiphy_device *csiphy)
> +{
> +	return 0;
> +}
> +
>   const struct csiphy_hw_ops csiphy_ops_2ph_1_0 = {
>   	.get_lane_mask = csiphy_get_lane_mask,
>   	.hw_version_read = csiphy_hw_version_read,
> @@ -187,4 +192,5 @@ const struct csiphy_hw_ops csiphy_ops_2ph_1_0 = {
>   	.lanes_enable = csiphy_lanes_enable,
>   	.lanes_disable = csiphy_lanes_disable,
>   	.isr = csiphy_isr,
> +	.init = csiphy_init,
>   };
> diff --git a/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c b/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
> index bc4834ee2dcc..b60c32a195df 100644
> --- a/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
> +++ b/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
> @@ -581,6 +581,11 @@ static void csiphy_lanes_disable(struct csiphy_device *csiphy,
>   			  CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(6));
>   }
>   
> +static int csiphy_init(struct csiphy_device *csiphy)
> +{
> +	return 0;
> +}
> +
>   const struct csiphy_hw_ops csiphy_ops_3ph_1_0 = {
>   	.get_lane_mask = csiphy_get_lane_mask,
>   	.hw_version_read = csiphy_hw_version_read,
> @@ -588,4 +593,5 @@ const struct csiphy_hw_ops csiphy_ops_3ph_1_0 = {
>   	.lanes_enable = csiphy_lanes_enable,
>   	.lanes_disable = csiphy_lanes_disable,
>   	.isr = csiphy_isr,
> +	.init = csiphy_init,
>   };
> diff --git a/drivers/media/platform/qcom/camss/camss-csiphy.c b/drivers/media/platform/qcom/camss/camss-csiphy.c
> index 2f7361dfd461..ea5c7078ec8e 100644
> --- a/drivers/media/platform/qcom/camss/camss-csiphy.c
> +++ b/drivers/media/platform/qcom/camss/camss-csiphy.c
> @@ -576,6 +576,10 @@ int msm_csiphy_subdev_init(struct camss *camss,
>   	csiphy->cfg.combo_mode = 0;
>   	csiphy->res = &res->csiphy;
>   
> +	ret = csiphy->res->hw_ops->init(csiphy);

Here.

> +	if (ret)
> +		return ret;
> +
>   	/* Memory */
>   
>   	csiphy->base = devm_platform_ioremap_resource_byname(pdev, res->reg[0]);
> diff --git a/drivers/media/platform/qcom/camss/camss-csiphy.h b/drivers/media/platform/qcom/camss/camss-csiphy.h
> index 47f0b6b09eba..bdf9a9c8bacc 100644
> --- a/drivers/media/platform/qcom/camss/camss-csiphy.h
> +++ b/drivers/media/platform/qcom/camss/camss-csiphy.h
> @@ -71,6 +71,7 @@ struct csiphy_hw_ops {
>   	void (*lanes_disable)(struct csiphy_device *csiphy,
>   			      struct csiphy_config *cfg);
>   	irqreturn_t (*isr)(int irq, void *dev);
> +	int (*init)(struct csiphy_device *csiphy);
>   };
>   
>   struct csiphy_subdev_resources {

--
Best wishes,
Vladimir