From 1b1b6385532b4bf037913943c45cce065b0927d0 Mon Sep 17 00:00:00 2001
From: Akihiro Mizusawa <amizusawa@nvidia.com>
Date: Wed, 12 Feb 2025 00:16:23 +0000
Subject: [PATCH] host: isp: Deprecate nvhost module APIs

Deprecate the nvhost module APIs as the nvhost driver will be
deprecated in the future.
Implement equivalent functionality by copying the contents of
nvhost_module_<init, deinit> to the ISP driver.

Bug 4921620

Change-Id: Ibdc98dcb44b2992a3ad7af830db96be416a8c7b6
Signed-off-by: Akihiro Mizusawa <amizusawa@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3300671
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Frank Chen <frankc@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Chinniah Poosapadi <cpoosapadi@nvidia.com>
Reviewed-by: FNU Raunak <fraunak@nvidia.com>
---
 drivers/video/tegra/host/isp/isp5.c | 76 ++++++++++++++++++++++++++++-
 1 file changed, 75 insertions(+), 1 deletion(-)

diff --git a/drivers/video/tegra/host/isp/isp5.c b/drivers/video/tegra/host/isp/isp5.c
index a2083c07..ad3d6624 100644
--- a/drivers/video/tegra/host/isp/isp5.c
+++ b/drivers/video/tegra/host/isp/isp5.c
@@ -12,6 +12,7 @@
 #include <linux/host1x-next.h>
 #include <linux/iommu.h>
 #include <linux/clk.h>
+#include <linux/reset.h>
 #include <linux/debugfs.h>
 #include <linux/device.h>
 #include <linux/dma-buf.h>
@@ -167,6 +168,77 @@ static uint32_t isp5_get_gos_table(struct platform_device *pdev,
 	return count;
 }
 
+static int isp5_module_init(struct platform_device *pdev)
+{
+	struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
+	unsigned int i;
+	int err;
+
+	err = devm_clk_bulk_get_all(&pdev->dev, &pdata->clks);
+	if (err < 0) {
+		dev_err(&pdev->dev, "failed to get clocks %d\n", err);
+		return err;
+	}
+	pdata->num_clks = err;
+
+	for (i = 0; i < pdata->num_clks; i++) {
+		err = clk_set_rate(pdata->clks[i].clk, ULONG_MAX);
+		if (err < 0) {
+			dev_err(&pdev->dev, "failed to set clock rate!\n");
+			return err;
+		}
+	}
+
+	pdata->reset_control = devm_reset_control_get_exclusive_released(
+					&pdev->dev, NULL);
+	if (IS_ERR(pdata->reset_control)) {
+		dev_err(&pdev->dev, "failed to get reset\n");
+		return PTR_ERR(pdata->reset_control);
+	}
+
+	reset_control_acquire(pdata->reset_control);
+	if (err < 0) {
+		dev_err(&pdev->dev, "failed to acquire reset: %d\n", err);
+		return err;
+	}
+
+	err = clk_bulk_prepare_enable(pdata->num_clks, pdata->clks);
+	if (err < 0) {
+		reset_control_release(pdata->reset_control);
+		dev_err(&pdev->dev, "failed to enabled clocks: %d\n", err);
+		return err;
+	}
+
+	reset_control_reset(pdata->reset_control);
+	clk_bulk_disable_unprepare(pdata->num_clks, pdata->clks);
+	reset_control_release(pdata->reset_control);
+
+	if (pdata->autosuspend_delay) {
+		pm_runtime_set_autosuspend_delay(&pdev->dev,
+			pdata->autosuspend_delay);
+		pm_runtime_use_autosuspend(&pdev->dev);
+	}
+
+	pm_runtime_enable(&pdev->dev);
+	if (!pm_runtime_enabled(&pdev->dev))
+		return -EOPNOTSUPP;
+
+	pdata->debugfs = debugfs_create_dir(pdev->dev.of_node->name,
+					    NULL);
+
+	return 0;
+
+}
+
+static void isp5_module_deinit(struct platform_device *pdev)
+{
+	struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
+
+	pm_runtime_disable(&pdev->dev);
+
+	debugfs_remove_recursive(pdata->debugfs);
+}
+
 static struct isp_channel_drv_ops isp5_channel_drv_ops = {
 	.alloc_syncpt = isp5_alloc_syncpt,
 	.release_syncpt = isp5_release_syncpt,
@@ -364,7 +436,7 @@ static int isp5_probe(struct platform_device *pdev)
 		goto error;
 	}
 
-	err = nvhost_module_init(pdev);
+	err = isp5_module_init(pdev);
 	if (err)
 		goto deinit;
 
@@ -401,6 +473,8 @@ static int isp5_probe(struct platform_device *pdev)
 
 release_client:
 	isp5_client_device_release(pdev);
+deinit:
+	isp5_module_deinit(pdev);
 error:
 	if (err != -EPROBE_DEFER)
 		dev_err(&pdev->dev, "probe failed: %d\n", err);