media: qcom: camss: Start to move to module compat matched resources

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 disparate 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@linaro.org>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

2 files changed, 54 insertions, 44 deletions

diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index 718ef8e4f593..8fa5dee75672 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 @@ err_cleanup:
  */
 static int camss_init_subdevices(struct camss *camss)
 {
-	const struct camss_subdev_resources *csiphy_res;
-	const struct camss_subdev_resources *csid_res;
-	const struct camss_subdev_resources *ispif_res;
-	const struct camss_subdev_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, res->ispif_res);
 	if (ret < 0) {
 		dev_err(camss->dev, "Failed to init ispif sub-device: %d\n",
 		ret);
@@ -1568,6 +1535,8 @@ static int camss_probe(struct platform_device *pdev)
 	if (!camss)
 		return -ENOMEM;
 
+	camss->res = of_device_get_match_data(dev);
+
 	atomic_set(&camss->ref_count, 0);
 	camss->dev = dev;
 	platform_set_drvdata(pdev, camss);
@@ -1742,12 +1711,45 @@ static void camss_remove(struct platform_device *pdev)
 	camss_genpd_cleanup(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 9d6ba7b17ff0..20c84e832888 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 camss_subdev_resources *csiphy_res;
+	const struct camss_subdev_resources *csid_res;
+	const struct camss_subdev_resources *ispif_res;
+	const struct camss_subdev_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 {