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Message-ID: <YcS6rl+dFqhH7giF@ripper>
Date: Thu, 23 Dec 2021 10:06:38 -0800
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc: linux-media@...r.kernel.org, Robert Foss <robert.foss@...aro.org>,
Todor Tomov <todor.too@...il.com>,
Andy Gross <agross@...nel.org>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
Prabhakar <prabhakar.csengg@...il.com>,
linux-renesas-soc@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 02/13] media: camss: Use platform_get_irq_byname() to get
the interrupt
On Thu 23 Dec 09:30 PST 2021, Lad Prabhakar wrote:
> platform_get_resource_byname(pdev, IORESOURCE_IRQ, ..) relies on static
> allocation of IRQ resources in DT core code, this causes an issue
> when using hierarchical interrupt domains using "interrupts" property
> in the node as this bypasses the hierarchical setup and messes up the
> irq chaining.
>
> In preparation for removal of static setup of IRQ resource from DT core
> code use platform_get_irq_byname().
>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Regards,
Bjorn
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
> drivers/media/platform/qcom/camss/camss-csid.c | 12 ++++--------
> drivers/media/platform/qcom/camss/camss-csiphy.c | 12 ++++--------
> drivers/media/platform/qcom/camss/camss-ispif.c | 12 ++++--------
> drivers/media/platform/qcom/camss/camss-vfe.c | 12 ++++--------
> 4 files changed, 16 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/media/platform/qcom/camss/camss-csid.c b/drivers/media/platform/qcom/camss/camss-csid.c
> index a1637b78568b..ac3504e98668 100644
> --- a/drivers/media/platform/qcom/camss/camss-csid.c
> +++ b/drivers/media/platform/qcom/camss/camss-csid.c
> @@ -544,7 +544,6 @@ int msm_csid_subdev_init(struct camss *camss, struct csid_device *csid,
> {
> struct device *dev = camss->dev;
> struct platform_device *pdev = to_platform_device(dev);
> - struct resource *r;
> int i, j;
> int ret;
>
> @@ -571,14 +570,11 @@ int msm_csid_subdev_init(struct camss *camss, struct csid_device *csid,
>
> /* Interrupt */
>
> - r = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
> - res->interrupt[0]);
> - if (!r) {
> - dev_err(dev, "missing IRQ\n");
> - return -EINVAL;
> - }
> + ret = platform_get_irq_byname(pdev, res->interrupt[0]);
> + if (ret < 0)
> + return ret;
>
> - csid->irq = r->start;
> + csid->irq = ret;
> snprintf(csid->irq_name, sizeof(csid->irq_name), "%s_%s%d",
> dev_name(dev), MSM_CSID_NAME, csid->id);
> ret = devm_request_irq(dev, csid->irq, csid->ops->isr,
> diff --git a/drivers/media/platform/qcom/camss/camss-csiphy.c b/drivers/media/platform/qcom/camss/camss-csiphy.c
> index 24eec16197e7..6b225d06f35a 100644
> --- a/drivers/media/platform/qcom/camss/camss-csiphy.c
> +++ b/drivers/media/platform/qcom/camss/camss-csiphy.c
> @@ -568,7 +568,6 @@ int msm_csiphy_subdev_init(struct camss *camss,
> {
> struct device *dev = camss->dev;
> struct platform_device *pdev = to_platform_device(dev);
> - struct resource *r;
> int i, j;
> int ret;
>
> @@ -611,14 +610,11 @@ int msm_csiphy_subdev_init(struct camss *camss,
>
> /* Interrupt */
>
> - r = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
> - res->interrupt[0]);
> - if (!r) {
> - dev_err(dev, "missing IRQ\n");
> - return -EINVAL;
> - }
> + ret = platform_get_irq_byname(pdev, res->interrupt[0]);
> + if (ret < 0)
> + return ret;
>
> - csiphy->irq = r->start;
> + csiphy->irq = ret;
> snprintf(csiphy->irq_name, sizeof(csiphy->irq_name), "%s_%s%d",
> dev_name(dev), MSM_CSIPHY_NAME, csiphy->id);
>
> diff --git a/drivers/media/platform/qcom/camss/camss-ispif.c b/drivers/media/platform/qcom/camss/camss-ispif.c
> index ba5d65f6ef34..4ee11bb979cd 100644
> --- a/drivers/media/platform/qcom/camss/camss-ispif.c
> +++ b/drivers/media/platform/qcom/camss/camss-ispif.c
> @@ -1100,7 +1100,6 @@ int msm_ispif_subdev_init(struct camss *camss,
> struct device *dev = camss->dev;
> struct ispif_device *ispif = camss->ispif;
> struct platform_device *pdev = to_platform_device(dev);
> - struct resource *r;
> int i;
> int ret;
>
> @@ -1153,14 +1152,11 @@ int msm_ispif_subdev_init(struct camss *camss,
>
> /* Interrupt */
>
> - r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, res->interrupt);
> -
> - if (!r) {
> - dev_err(dev, "missing IRQ\n");
> - return -EINVAL;
> - }
> + ret = platform_get_irq_byname(pdev, res->interrupt);
> + if (ret < 0)
> + return ret;
>
> - ispif->irq = r->start;
> + ispif->irq = ret;
> snprintf(ispif->irq_name, sizeof(ispif->irq_name), "%s_%s",
> dev_name(dev), MSM_ISPIF_NAME);
> if (camss->version == CAMSS_8x16)
> diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
> index 71f78b40e7f5..7c2311d70546 100644
> --- a/drivers/media/platform/qcom/camss/camss-vfe.c
> +++ b/drivers/media/platform/qcom/camss/camss-vfe.c
> @@ -1279,7 +1279,6 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
> {
> struct device *dev = camss->dev;
> struct platform_device *pdev = to_platform_device(dev);
> - struct resource *r;
> int i, j;
> int ret;
>
> @@ -1312,14 +1311,11 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
>
> /* Interrupt */
>
> - r = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
> - res->interrupt[0]);
> - if (!r) {
> - dev_err(dev, "missing IRQ\n");
> - return -EINVAL;
> - }
> + ret = platform_get_irq_byname(pdev, res->interrupt[0]);
> + if (ret < 0)
> + return ret;
>
> - vfe->irq = r->start;
> + vfe->irq = ret;
> snprintf(vfe->irq_name, sizeof(vfe->irq_name), "%s_%s%d",
> dev_name(dev), MSM_VFE_NAME, vfe->id);
> ret = devm_request_irq(dev, vfe->irq, vfe->ops->isr,
> --
> 2.17.1
>
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