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drm/tegra: Enabling ICC for NVDEC

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In order to avoid the NVDEC performance bottleneck from EMC,
NVDEC needs to ask for the required memory bandwidth for itself
according to its current frequency and load.

Bug 4097374

Signed-off-by: Johnny Liu <johnliu@nvidia.com>
Change-Id: I2daff5d3616db03d7576e8e9433aebbf3d566e86
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2914610
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Johnny Liu
2023-06-02 06:42:58 +00:00
committed by mobile promotions
parent 856af79422
commit 6fc7c1ad7c
1 changed files with 35 additions and 3 deletions
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38
drivers/gpu/drm/tegra/nvdec.c
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@@ -9,6 +9,7 @@
#include <linux/devfreq/tegra_wmark.h>
#include <linux/dma-mapping.h>
#include <linux/host1x-next.h>
#include <linux/interconnect.h>
#include <linux/iommu.h>
#include <linux/iopoll.h>
#include <linux/module.h>
@@ -19,6 +20,7 @@
#include <linux/pm_opp.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <linux/version.h>
#include <soc/tegra/mc.h>
@@ -33,6 +35,7 @@
#define NVDEC_FALCON_DEBUGINFO 0x1094
#define NVDEC_TFBIF_TRANSCFG 0x2c44
#define NVDEC_TFBIF_ACTMON_ACTIVE_WEIGHT 0x2c54
#define NVDEC_AXI_RW_BANDWIDTH 512
struct nvdec_config {
const char *firmware;
@@ -55,6 +58,7 @@ struct nvdec {
struct reset_control *reset;
struct devfreq *devfreq;
struct devfreq_dev_profile *devfreq_profile;
struct icc_path *icc_write;
/* Platform configuration */
const struct nvdec_config *config;
@@ -80,7 +84,7 @@ static int nvdec_set_rate(struct nvdec *nvdec, unsigned long rate)
struct nvdec_config *config = nvdec->config;
struct host1x_client *client = &nvdec->client.base;
unsigned long dev_rate;
u32 weight;
u32 weight, emc_kbps;
int err;
err = clk_set_rate(nvdec->clks[0].clk, rate);
@@ -89,6 +93,13 @@ static int nvdec_set_rate(struct nvdec *nvdec, unsigned long rate)
dev_rate = clk_get_rate(nvdec->clks[0].clk);
if (nvdec->icc_write) {
emc_kbps = dev_rate * NVDEC_AXI_RW_BANDWIDTH / 1024;
err = icc_set_bw(nvdec->icc_write, kbps_to_icc(emc_kbps), 0);
if (err)
dev_warn(nvdec->dev, "failed to set icc bw: %d\n", err);
}
host1x_actmon_update_client_rate(client, dev_rate, &weight);
if (!weight)
@@ -534,6 +545,7 @@ disable:
static __maybe_unused int nvdec_runtime_suspend(struct device *dev)
{
struct nvdec *nvdec = dev_get_drvdata(dev);
int err;
devfreq_suspend_device(nvdec->devfreq);
@@ -541,6 +553,12 @@ static __maybe_unused int nvdec_runtime_suspend(struct device *dev)
clk_bulk_disable_unprepare(nvdec->num_clks, nvdec->clks);
if (nvdec->icc_write) {
err = icc_set_bw(nvdec->icc_write, 0, 0);
if (err)
dev_warn(nvdec->dev, "failed to set icc bw: %d\n", err);
}
return 0;
}
@@ -716,6 +734,17 @@ static int nvdec_probe(struct platform_device *pdev)
return err;
}
nvdec->icc_write = devm_of_icc_get(dev, "write");
#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0)
if (IS_ERR(nvdec->icc_write)) {
dev_err(&pdev->dev, "failed to get icc write handle\n");
return PTR_ERR(nvdec->icc_write);
}
#else
if (IS_ERR(nvdec->icc_write))
nvdec->icc_write = NULL;
#endif
platform_set_drvdata(pdev, nvdec);
INIT_LIST_HEAD(&nvdec->client.base.list);
@@ -744,13 +773,13 @@ static int nvdec_probe(struct platform_device *pdev)
err = clk_set_rate(nvdec->clks[0].clk, ULONG_MAX);
if (err < 0) {
dev_err(&pdev->dev, "failed to set clock rate: %d\n", err);
return err;
goto exit_falcon;
}
err = nvdec_devfreq_init(nvdec);
if (err < 0) {
dev_err(&pdev->dev, "failed to init devfreq: %d\n", err);
return err;
goto exit_falcon;
}
pm_runtime_enable(dev);
@@ -761,6 +790,7 @@ static int nvdec_probe(struct platform_device *pdev)
exit_falcon:
falcon_exit(&nvdec->falcon);
icc_put(nvdec->icc_write);
return err;
}
@@ -788,6 +818,8 @@ static int nvdec_remove(struct platform_device *pdev)
falcon_exit(&nvdec->falcon);
icc_put(nvdec->icc_write);
return 0;
}