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platform: dce: add delay between ipc_notify admin-seq

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Add a few microseconds delay between sending ipc-notify calls for IPC
channel reset. IPC notify ACKs are asynchronous and sending notify when
the previous ACK was still in progress will cause spurious interrupt/ACK
signal and printout FSP state warnings.

Bug 4069133

Change-Id: I20dff299149a66629dc23ab2a7cb7765eac1b4dc
Signed-off-by: Mahesh Kumar <mahkumar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2900570
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Vinod Atyam <vatyam@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
Tested-by: Vinod Atyam <vatyam@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2902404
This commit is contained in:
Mahesh Kumar
2023-05-09 04:40:16 +00:00
committed by mobile promotions
parent 30ebc1a639
commit d4185fbe2e
3 changed files with 17 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/platform/tegra/dce/dce-bootstrap.c
View File

@@ -155,6 +155,7 @@ dce_start_boot_flow(struct tegra_dce *d)
}
dce_admin_ivc_channel_reset(d);
dce_usleep_range(10, 50);
ret = dce_start_admin_seq(d);
if (ret) {

14
drivers/platform/tegra/dce/dce-util-common.c
View File

@@ -601,6 +601,20 @@ unsigned long dce_get_nxt_pow_of_2(unsigned long *addr, u8 nbits)
return val;
}
/*
* dce_usleep_range : sleep between min-max range
*
* @min : minimum sleep time in usec
* @max : maximum sleep time in usec
*
* Return : void
*/
void dce_usleep_range(unsigned long min, unsigned long max)
{
usleep_range(min, max);
}
/*
* dce_schedule_work : schedule work in global highpri workqueue
*

2
drivers/platform/tegra/dce/include/dce-util-common.h
View File

@@ -41,6 +41,8 @@ void dce_kfree(struct tegra_dce *d, void *addr);
unsigned long dce_get_nxt_pow_of_2(unsigned long *addr, u8 nbits);
void dce_usleep_range(unsigned long min, unsigned long max);
static inline void dce_bitmap_set(unsigned long *map,
unsigned int start, unsigned int len)
{