[PATCH v2 02/13] media: qcom: camss: Start to move to module compat matched resources

[Bryan O'Donoghue]

There is a lot of unnecessary if/elsing in this code that arguably
should never have made it upstream when adding a second let alone
subsequent SoC.

I'm guilty of not fixing the mess myself when adding in the sm8250.
Before adding in any new SoCs or resources lets take the time to cleanup
the resource passing.

First step is to pass the generic struct camss_resources as a parameter
per the compatible list.

Subsequent patches will address the other somewhat dispirate strutures
which we are also doing if/else on and assigning statically.

Squashed down a commit to drop useless NULL assignment for ispif resources.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
---
 drivers/media/platform/qcom/camss/camss.c | 92 ++++++++++++-----------
 drivers/media/platform/qcom/camss/camss.h |  8 ++
 2 files changed, 56 insertions(+), 44 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index de39dc987444f..2f9d5ad303951 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/pm_runtime.h>
 #include <linux/pm_domain.h>
@@ -1120,47 +1121,13 @@ static int camss_of_parse_ports(struct camss *camss)
  */
 static int camss_init_subdevices(struct camss *camss)
 {
-	const struct resources *csiphy_res;
-	const struct resources *csid_res;
-	const struct resources *ispif_res;
-	const struct resources *vfe_res;
+	const struct camss_resources *res = &camss->res;
 	unsigned int i;
 	int ret;
 
-	if (camss->version == CAMSS_8x16) {
-		csiphy_res = csiphy_res_8x16;
-		csid_res = csid_res_8x16;
-		ispif_res = &ispif_res_8x16;
-		vfe_res = vfe_res_8x16;
-	} else if (camss->version == CAMSS_8x96) {
-		csiphy_res = csiphy_res_8x96;
-		csid_res = csid_res_8x96;
-		ispif_res = &ispif_res_8x96;
-		vfe_res = vfe_res_8x96;
-	} else if (camss->version == CAMSS_660) {
-		csiphy_res = csiphy_res_660;
-		csid_res = csid_res_660;
-		ispif_res = &ispif_res_660;
-		vfe_res = vfe_res_660;
-	}  else if (camss->version == CAMSS_845) {
-		csiphy_res = csiphy_res_845;
-		csid_res = csid_res_845;
-		/* Titan VFEs don't have an ISPIF  */
-		ispif_res = NULL;
-		vfe_res = vfe_res_845;
-	} else if (camss->version == CAMSS_8250) {
-		csiphy_res = csiphy_res_8250;
-		csid_res = csid_res_8250;
-		/* Titan VFEs don't have an ISPIF  */
-		ispif_res = NULL;
-		vfe_res = vfe_res_8250;
-	} else {
-		return -EINVAL;
-	}
-
 	for (i = 0; i < camss->csiphy_num; i++) {
 		ret = msm_csiphy_subdev_init(camss, &camss->csiphy[i],
-					     &csiphy_res[i], i);
+					     res->csiphy_res[i], i);
 		if (ret < 0) {
 			dev_err(camss->dev,
 				"Failed to init csiphy%d sub-device: %d\n",
@@ -1172,7 +1139,7 @@ static int camss_init_subdevices(struct camss *camss)
 	/* note: SM8250 requires VFE to be initialized before CSID */
 	for (i = 0; i < camss->vfe_num + camss->vfe_lite_num; i++) {
 		ret = msm_vfe_subdev_init(camss, &camss->vfe[i],
-					  &vfe_res[i], i);
+					  res->vfe_res[i], i);
 		if (ret < 0) {
 			dev_err(camss->dev,
 				"Fail to init vfe%d sub-device: %d\n", i, ret);
@@ -1182,7 +1149,7 @@ static int camss_init_subdevices(struct camss *camss)
 
 	for (i = 0; i < camss->csid_num; i++) {
 		ret = msm_csid_subdev_init(camss, &camss->csid[i],
-					   &csid_res[i], i);
+					   res->csid_res[i], i);
 		if (ret < 0) {
 			dev_err(camss->dev,
 				"Failed to init csid%d sub-device: %d\n",
@@ -1191,7 +1158,7 @@ static int camss_init_subdevices(struct camss *camss)
 		}
 	}
 
-	ret = msm_ispif_subdev_init(camss, ispif_res);
+	ret = msm_ispif_subdev_init(camss, camss->res->ispif_res);
 	if (ret < 0) {
 		dev_err(camss->dev, "Failed to init ispif sub-device: %d\n",
 		ret);
@@ -1554,6 +1521,10 @@ static int camss_probe(struct platform_device *pdev)
 	if (!camss)
 		return -ENOMEM;
 
+	camss->res = of_device_get_match_data(dev);
+	if (!camss->res)
+		return -ENODEV;
+
 	atomic_set(&camss->ref_count, 0);
 	camss->dev = dev;
 	platform_set_drvdata(pdev, camss);
@@ -1735,12 +1706,45 @@ static void camss_remove(struct platform_device *pdev)
 		camss_delete(camss);
 }
 
+static const struct camss_resources msm8916_resources = {
+	.csiphy_res = csiphy_res_8x16,
+	.csid_res = csid_res_8x16,
+	.ispif_res = &ispif_res_8x16,
+	.vfe_res = vfe_res_8x16,
+};
+
+static const struct camss_resources msm8996_resources = {
+	.csiphy_res = csiphy_res_8x96,
+	.csid_res = csid_res_8x96,
+	.ispif_res = &ispif_res_8x96,
+	.vfe_res = vfe_res_8x96,
+};
+
+static const struct camss_resources sdm660_resources = {
+	.csiphy_res = csiphy_res_660,
+	.csid_res = csid_res_660,
+	.ispif_res = &ispif_res_660,
+	.vfe_res = vfe_res_660,
+};
+
+static const struct camss_resources sdm845_resources = {
+	.csiphy_res = csiphy_res_845,
+	.csid_res = csid_res_845,
+	.vfe_res = vfe_res_845,
+};
+
+static const struct camss_resources sm8250_resources = {
+	.csiphy_res = csiphy_res_8250,
+	.csid_res = csid_res_8250,
+	.vfe_res = vfe_res_8250,
+};
+
 static const struct of_device_id camss_dt_match[] = {
-	{ .compatible = "qcom,msm8916-camss" },
-	{ .compatible = "qcom,msm8996-camss" },
-	{ .compatible = "qcom,sdm660-camss" },
-	{ .compatible = "qcom,sdm845-camss" },
-	{ .compatible = "qcom,sm8250-camss" },
+	{ .compatible = "qcom,msm8916-camss", .data = &msm8916_resources },
+	{ .compatible = "qcom,msm8996-camss", .data = &msm8996_resources },
+	{ .compatible = "qcom,sdm660-camss", .data = &sdm660_resources },
+	{ .compatible = "qcom,sdm845-camss", .data = &sdm845_resources },
+	{ .compatible = "qcom,sm8250-camss", .data = &sm8250_resources },
 	{ }
 };
 
diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
index e95211cdb1fd6..f632ee49ad83e 100644
--- a/drivers/media/platform/qcom/camss/camss.h
+++ b/drivers/media/platform/qcom/camss/camss.h
@@ -79,6 +79,13 @@ enum icc_count {
 	ICC_SM8250_COUNT = 4,
 };
 
+struct camss_resources {
+	const struct resources *csiphy_res;
+	const struct resources *csid_res;
+	const struct resources *ispif_res;
+	const struct resources *vfe_res;
+};
+
 struct camss {
 	enum camss_version version;
 	struct v4l2_device v4l2_dev;
@@ -99,6 +106,7 @@ struct camss {
 	struct device_link **genpd_link;
 	struct icc_path *icc_path[ICC_SM8250_COUNT];
 	struct icc_bw_tbl icc_bw_tbl[ICC_SM8250_COUNT];
+	const struct camss_resources *res;
 };
 
 struct camss_camera_interface {
-- 
2.41.0