linux-kernel - [PATCH] media: qcom: camss: Add hooks to get CSID wrapper resources

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Message-ID: <20240814161434.1484857-1-bryan.odonoghue@linaro.org>
Date: Wed, 14 Aug 2024 17:14:34 +0100
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: quic_depengs@...cinc.com,
	rfoss@...nel.org,
	todor.too@...il.com,
	mchehab@...nel.org
Cc: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	linux-arm-msm@...r.kernel.org,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kernel@...cinc.com,
	quic_yon@...cinc.com,
	Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: [PATCH] media: qcom: camss: Add hooks to get CSID wrapper resources

New SoCs have CSID devices inside of a shared "wrapper" i.e. a set of regs
which is responsible for manging the muxes of the CSID to various other
blocks throughout CAMSS.

Not every SoC has this top-level muxing layer so make it optional depending
on whether its declared as a resource or not.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
---
 drivers/media/platform/qcom/camss/camss.c | 12 ++++++++++++
 drivers/media/platform/qcom/camss/camss.h |  6 ++++++
 2 files changed, 18 insertions(+)

diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index e797f3275fb0c..6da04cac93f3d 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -2037,6 +2037,7 @@ static int camss_of_parse_ports(struct camss *camss)
  */
 static int camss_init_subdevices(struct camss *camss)
 {
+	struct platform_device *pdev = to_platform_device(camss->dev);
 	const struct camss_resources *res = camss->res;
 	unsigned int i;
 	int ret;
@@ -2064,6 +2065,17 @@ static int camss_init_subdevices(struct camss *camss)
 		}
 	}
 
+	/* Get optional CSID wrapper regs shared between CSID devices */
+	if (res->csid_wrapper_res) {
+		char *reg = res->csid_wrapper_res->reg;
+		void __iomem *base;
+
+		base = devm_platform_ioremap_resource_byname(pdev, reg);
+		if (IS_ERR(base))
+			return PTR_ERR(base);
+		camss->csid_wrapper_base = base;
+	}
+
 	for (i = 0; i < camss->res->csid_num; i++) {
 		ret = msm_csid_subdev_init(camss, &camss->csid[i],
 					   &res->csid_res[i], i);
diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
index 867e275db4bec..a9b733cc626d8 100644
--- a/drivers/media/platform/qcom/camss/camss.h
+++ b/drivers/media/platform/qcom/camss/camss.h
@@ -66,6 +66,10 @@ struct resources_icc {
 	struct icc_bw_tbl icc_bw_tbl;
 };
 
+struct resources_wrapper {
+	char *reg;
+};
+
 enum pm_domain {
 	PM_DOMAIN_VFE0 = 0,
 	PM_DOMAIN_VFE1 = 1,
@@ -94,6 +98,7 @@ struct camss_resources {
 	const struct camss_subdev_resources *csid_res;
 	const struct camss_subdev_resources *ispif_res;
 	const struct camss_subdev_resources *vfe_res;
+	const struct resources_wrapper *csid_wrapper_res;
 	const struct resources_icc *icc_res;
 	const unsigned int icc_path_num;
 	const unsigned int csiphy_num;
@@ -111,6 +116,7 @@ struct camss {
 	struct csid_device *csid;
 	struct ispif_device *ispif;
 	struct vfe_device *vfe;
+	void __iomem *csid_wrapper_base;
 	atomic_t ref_count;
 	int genpd_num;
 	struct device *genpd;
-- 
2.45.2