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tsec: add support for s2idle state

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TSEC from t26x onwards is booted by PSC. Since s2idle PSC
never resets tsec, there is no need to handle streamid programming
form KMD side.

Moreover this change also fixes a bug wherein tsec KMD would
poweroff the clocks of TSEC in suspend case.

Bug 5407465

Change-Id: Idb648e2f0e7226bb779bd1a801796fa28c415419
Signed-off-by: spatki <spatki@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3420250
Reviewed-by: Mayuresh Kulkarni <mkulkarni@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
spatki
2025-07-30 12:05:03 +00:00
committed by mobile promotions
parent 97c57036d7
commit 4a68689610
2 changed files with 19 additions and 1 deletions
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17
drivers/video/tegra/tsec/tsec.c
View File

@@ -338,14 +338,31 @@ int tsec_poweroff(struct device *dev)
static int tsec_module_suspend(struct device *dev)
{
struct tsec_device_data *pdata = dev_get_drvdata(dev);
switch (pdata->soc) {
case TSEC_ON_T26x:
/*
* If TSEC is on T26x, we don't need to power off TSEC.
*/
return 0;
default:
return tsec_poweroff(dev);
}
}
static int tsec_module_resume(struct device *dev)
{
struct tsec_device_data *pdata = dev_get_drvdata(dev);
switch (pdata->soc) {
case TSEC_ON_T26x:
/*
* If the system resumed from suspend to idle, we don't need to resume TSEC.
* This is because TSEC is already powered on and running.
*/
if (pm_suspend_target_state == PM_SUSPEND_TO_IDLE)
return 0;
return tsec_t264_init(to_platform_device(dev));
default:
return tsec_poweron(dev);

1
drivers/video/tegra/tsec/tsec_linux.h
View File

@@ -34,5 +34,6 @@
#endif
#include <linux/sizes.h> /* for SZ_* size macros */
#include <vdso/bits.h> /* for BIT(x) macro */
#include <linux/suspend.h> /* for suspend APIs */
#endif /* TSEC_LINUX_H */