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rtcpu: set op point via sysfs

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Create and register set and get operating point sysfs functions.

The operating point notification will contain the requested
operating point.

The nvcap resource manager will extract the operating point
from the notfication and send it to rce via the hsp command
interface.

In turn, rce will apply the operating point by adjusting the
functional clock frequencies for the following camera ip:

- rce hardware
- vi hardware
- isp hardware
- nvcsi

Jira CAMERASW-26378

Signed-off-by: Robert Kelly <rkelly@nvidia.com>
Change-Id: Ia814b2716d3738efb3cbc37307a267140b555f42
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3179593
(cherry picked from commit d259727a57ecf4b9463030b3418715891b3b1209)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3189078
Reviewed-by: Semi Malinen <smalinen@nvidia.com>
Reviewed-by: Frank Chen <frankc@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Robert Kelly
2024-07-22 16:30:07 +00:00
committed by mobile promotions
parent d7a9c5b734
commit 98be04181c
4 changed files with 160 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

81
drivers/platform/tegra/rtcpu/tegra-camera-rtcpu-base.c
View File

@@ -2,9 +2,7 @@
// SPDX-FileCopyrightText: Copyright (c) 2022-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
#include <nvidia/conftest.h>
#include <linux/tegra-camera-rtcpu.h>
#include <linux/bitops.h>
#include <linux/completion.h>
#include <linux/delay.h>
@@ -31,6 +29,8 @@
#include <linux/tegra-rtcpu-trace.h>
#include <linux/version.h>
#include <linux/wait.h>
#include <linux/string.h>
#include <linux/sysfs.h>
#include "clk-group.h"
#include "device-group.h"
@@ -69,6 +69,7 @@ struct tegra_cam_rtcpu_pdata {
static int tegra_rce_cam_wait_for_idle(struct device *dev);
static void tegra_rce_cam_assert_resets(struct device *dev);
static int tegra_rce_cam_deassert_resets(struct device *dev);
static int tegra_camrtc_fw_set_operating_point(struct device *dev, uint32_t op);
static const char * const rce_reset_names[] = {
"reset-names", /* all named resets */
@@ -126,6 +127,66 @@ struct tegra_cam_rtcpu {
bool online;
};
static struct device *s_dev;
static uint32_t operating_point;
static ssize_t show_operating_point(struct kobject *kobj, struct kobj_attribute *attr, char *buff)
{
sprintf(buff, "%d", operating_point);
return strlen(buff);
}
static ssize_t store_operating_point(struct kobject *kobj, struct kobj_attribute *attr,
const char *buff, size_t count)
{
u32 temp;
if (kstrtou32(buff, 10, &temp) == 0) {
if ((temp == 0) || (temp == 6)) {
operating_point = (uint32_t)temp;
tegra_camrtc_fw_set_operating_point(s_dev, operating_point);
}
}
return count;
}
static struct kobj_attribute operating_point_attribute =
__ATTR(operating_point, 0644, show_operating_point, store_operating_point);
static struct attribute *attrs[] = {
&operating_point_attribute.attr,
NULL,
};
static struct attribute_group attr_group = {
.attrs = attrs,
};
static struct kobject *kobj;
static int init_operating_point_sysfs(void)
{
int ret;
operating_point = 0;
kobj = kobject_create_and_add("operating_point", kernel_kobj);
if (!kobj)
return -ENOMEM;
ret = sysfs_create_group(kobj, &attr_group);
if (ret)
kobject_put(kobj);
return ret;
}
static void deinit_operating_point_sysfs(void)
{
kobject_put(kobj);
}
static void __iomem *tegra_cam_ioremap(struct device *dev, int index)
{
struct resource mem;
@@ -350,6 +411,16 @@ static int tegra_rce_cam_wait_for_idle(struct device *dev)
return 0;
}
static int tegra_camrtc_fw_set_operating_point(struct device *dev, uint32_t op)
{
struct tegra_cam_rtcpu *rtcpu = dev_get_drvdata(dev);
if (!rtcpu->hsp)
return 0;
return camrtc_hsp_set_operating_point(rtcpu->hsp, op);
}
static int tegra_rce_cam_deassert_resets(struct device *dev)
{
struct tegra_cam_rtcpu *rtcpu = dev_get_drvdata(dev);
@@ -707,11 +778,11 @@ static int tegra_cam_rtcpu_remove(struct platform_device *pdev)
pdev->dev.dma_parms = NULL;
deinit_operating_point_sysfs();
return 0;
}
static struct device *s_dev;
static int tegra_cam_rtcpu_probe(struct platform_device *pdev)
{
struct tegra_cam_rtcpu *rtcpu;
@@ -810,6 +881,8 @@ static int tegra_cam_rtcpu_probe(struct platform_device *pdev)
s_dev = dev;
init_operating_point_sysfs();
dev_dbg(dev, "successfully probed RTCPU on %s\n", name);
return 0;