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drivers: pva: skip vpu load reading when suspended

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WHen PVA is already suspended, there is no need to resume the device
through nvhost_module_busy and send mailbox request to PVA for VPU load
reading. It avoids switching CV power domain on and off.

Bug 4168798

Signed-off-by: Johnny Liu <johnliu@nvidia.com>
Change-Id: Ib9ec4d4ded2b96ee8f76267e190087612d1e0468
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2946818
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Ninad Malwade <nmalwade@nvidia.com>
Reviewed-by: Omar Nemri <onemri@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Johnny Liu
2023-08-02 09:52:01 +00:00
committed by mobile promotions
parent edf9d114e1
commit c983eec625
1 changed files with 17 additions and 9 deletions
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26
drivers/video/tegra/host/pva/pva_debug.c
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@@ -5,18 +5,21 @@
* PVA Debug Information file
*/
#include <linux/debugfs.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/debugfs.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/nvhost.h>
#include <linux/uaccess.h>
#include <linux/dma-mapping.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include "pva.h"
#include <linux/types.h>
#include <linux/uaccess.h>
#include <uapi/linux/nvpva_ioctl.h>
#include "pva.h"
#include "pva_vpu_ocd.h"
#include "pva-fw-address-map.h"
@@ -249,8 +252,13 @@ static void update_vpu_stats(struct pva *pva, bool stats_enabled)
pva->vpu_util_info.stats_fw_buffer_va;
u64 *vpu_stats = pva->vpu_util_info.vpu_stats;
if (vpu_stats == 0)
goto err_out;
#ifdef CONFIG_PM
if (pm_runtime_suspended(&pva->pdev->dev)) {
vpu_stats[0] = 0;
vpu_stats[1] = 0;
return;
}
#endif
err = nvhost_module_busy(pva->pdev);
if (err < 0) {