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drm/tegra: Enable devfreq for the nvjpg client

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Enable devfreq for the nvjpg client with userspace governor by default.

Bug 4074193

Signed-off-by: Johnny Liu <johnliu@nvidia.com>
Change-Id: Ic70651b5af4648808b188560e4c09da00c5dde55
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2895739
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Johnny Liu
2023-04-28 06:47:45 +00:00
committed by mobile promotions
parent a61d58efd6
commit df86f78c76
1 changed files with 101 additions and 0 deletions
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101
drivers/gpu/drm/tegra/nvjpg.c
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@@ -5,6 +5,7 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/devfreq.h>
#include <linux/host1x-next.h>
#include <linux/iommu.h>
#include <linux/module.h>
@@ -12,6 +13,7 @@
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
@@ -39,6 +41,8 @@ struct nvjpg {
struct host1x_channel *channel;
struct device *dev;
struct clk *clk;
struct devfreq *devfreq;
struct devfreq_dev_profile *devfreq_profile;
/* Platform configuration */
const struct nvjpg_config *config;
@@ -95,6 +99,91 @@ static int nvjpg_boot(struct nvjpg *nvjpg)
return 0;
}
static int nvjpg_devfreq_target(struct device *dev, unsigned long *freq, u32 flags)
{
struct nvjpg *nvjpg = dev_get_drvdata(dev);
int err;
err = nvjpg_set_rate(nvjpg, *freq);
if (err < 0) {
dev_err(dev, "failed to set clock rate\n");
return err;
}
*freq = clk_get_rate(nvjpg->clk);
return 0;
}
static int nvjpg_devfreq_get_dev_status(struct device *dev, struct devfreq_dev_status *stat)
{
struct nvjpg *nvjpg = dev_get_drvdata(dev);
struct host1x_client *client = &nvjpg->client.base;
unsigned long usage;
/* Update load information */
host1x_actmon_read_active_norm(client, &usage);
stat->total_time = 1;
stat->busy_time = usage;
/* Update device frequency */
stat->current_frequency = clk_get_rate(nvjpg->clk);
return 0;
}
static int nvjpg_devfreq_get_cur_freq(struct device *dev, unsigned long *freq)
{
struct nvjpg *nvjpg = dev_get_drvdata(dev);
*freq = clk_get_rate(nvjpg->clk);
return 0;
}
static struct devfreq_dev_profile nvjpg_devfreq_profile = {
.target = nvjpg_devfreq_target,
.get_dev_status = nvjpg_devfreq_get_dev_status,
.get_cur_freq = nvjpg_devfreq_get_cur_freq,
.polling_ms = 100,
};
static int nvjpg_devfreq_init(struct nvjpg *nvjpg)
{
unsigned long max_rate = clk_round_rate(nvjpg->clk, ULONG_MAX);
unsigned long min_rate = clk_round_rate(nvjpg->clk, 0);
unsigned long margin = clk_round_rate(nvjpg->clk, min_rate + 1) - min_rate;
unsigned long rate = min_rate;
struct devfreq *devfreq;
while (rate <= max_rate) {
dev_pm_opp_add(nvjpg->dev, rate, 0);
rate += margin;
}
devfreq = devm_devfreq_add_device(nvjpg->dev,
&nvjpg_devfreq_profile,
DEVFREQ_GOV_USERSPACE,
NULL);
if (IS_ERR(devfreq))
return PTR_ERR(devfreq);
devfreq->suspend_freq = min_rate;
devfreq->resume_freq = min_rate;
nvjpg->devfreq = devfreq;
return 0;
}
static void nvjpg_devfreq_deinit(struct nvjpg *nvjpg)
{
if (!nvjpg->devfreq)
return;
devm_devfreq_remove_device(nvjpg->dev, nvjpg->devfreq);
nvjpg->devfreq = NULL;
}
static int nvjpg_init(struct host1x_client *client)
{
struct tegra_drm_client *drm = host1x_to_drm_client(client);
@@ -279,6 +368,8 @@ static __maybe_unused int nvjpg_runtime_resume(struct device *dev)
if (err < 0)
goto disable;
devfreq_resume_device(nvjpg->devfreq);
return 0;
disable:
@@ -290,6 +381,8 @@ static __maybe_unused int nvjpg_runtime_suspend(struct device *dev)
{
struct nvjpg *nvjpg = dev_get_drvdata(dev);
devfreq_suspend_device(nvjpg->devfreq);
host1x_channel_stop(nvjpg->channel);
clk_disable_unprepare(nvjpg->clk);
@@ -464,6 +557,12 @@ static int nvjpg_probe(struct platform_device *pdev)
return err;
}
err = nvjpg_devfreq_init(nvjpg);
if (err < 0) {
dev_err(&pdev->dev, "failed to init devfreq: %d\n", err);
return err;
}
pm_runtime_enable(dev);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_autosuspend_delay(dev, 500);
@@ -483,6 +582,8 @@ static int nvjpg_remove(struct platform_device *pdev)
pm_runtime_disable(&pdev->dev);
nvjpg_devfreq_deinit(nvjpg);
err = host1x_actmon_unregister(&nvjpg->client.base);
if (err < 0)
dev_info(&pdev->dev, "failed to unregister host1x actmon: %d\n",