From c2dd36f33c3da1ed60c81aa79a32e86f7454ce28 Mon Sep 17 00:00:00 2001
From: Akihiro Mizusawa <amizusawa@nvidia.com>
Date: Mon, 17 Mar 2025 22:07:24 +0000
Subject: [PATCH] host: capture-support: Deprecate nvhost_module_pm_ops

Deprecate the usage of nvhost_module_pm_ops as part of the wider
nvhost API deprecation while maintaining equivalent functionality.

The capture-support driver does not register prepare_poweroff,
poweron_reset, finalize_poweron callbacks nor set the clock gating
regs with nvhost, so the runtime operations will only call clk APIs.

Bug 4921620

Change-Id: I438621258378bb6e81fc7a82e3334dcbfa180dc9
Signed-off-by: Akihiro Mizusawa <amizusawa@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3321085
Reviewed-by: Chinniah Poosapadi <cpoosapadi@nvidia.com>
Reviewed-by: Frank Chen <frankc@nvidia.com>
Tested-by: FNU Raunak <fraunak@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: FNU Raunak <fraunak@nvidia.com>
---
 .../tegra/host/capture/capture-support.c      | 33 ++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/drivers/video/tegra/host/capture/capture-support.c b/drivers/video/tegra/host/capture/capture-support.c
index ad341f2b..29f98139 100644
--- a/drivers/video/tegra/host/capture/capture-support.c
+++ b/drivers/video/tegra/host/capture/capture-support.c
@@ -23,6 +23,8 @@
 #include <soc/tegra/fuse.h>
 #include <linux/nvhost.h>
 #include <uapi/linux/nvhost_ioctl.h>
+#include <linux/reset.h>
+#include <linux/clk.h>
 
 #ifdef CONFIG_TEGRA_HWPM_CAM
 #include <uapi/linux/tegra-soc-hwpm-uapi.h>
@@ -256,6 +258,35 @@ static const struct of_device_id capture_support_match[] = {
 };
 MODULE_DEVICE_TABLE(of, capture_support_match);
 
+static int capture_support_runtime_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct nvhost_device_data *info = platform_get_drvdata(pdev);
+
+	clk_bulk_disable_unprepare(info->num_clks, info->clks);
+
+	return 0;
+}
+
+static int capture_support_runtime_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
+	int err;
+
+	err = clk_bulk_prepare_enable(pdata->num_clks, pdata->clks);
+	if (err) {
+		dev_warn(dev, "failed to enable clocks: %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+const struct dev_pm_ops capture_support_pm_ops = {
+	SET_RUNTIME_PM_OPS(capture_support_runtime_suspend, capture_support_runtime_resume, NULL)
+};
+
 #if defined(NV_PLATFORM_DRIVER_STRUCT_REMOVE_RETURNS_VOID) /* Linux v6.11 */
 static void capture_support_remove_wrapper(struct platform_device *pdev)
 {
@@ -275,7 +306,7 @@ static struct platform_driver capture_support_driver = {
 		/* Only suitable name for dummy falcon driver */
 		.name = "scare-pigeon",
 		.of_match_table = capture_support_match,
-		.pm = &nvhost_module_pm_ops,
+		.pm = &capture_support_pm_ops,
 	},
 };