nv-tegra-mirror/linux-nv-oot
1
0
Fork 0
mirror of git://nv-tegra.nvidia.com/linux-nv-oot.git synced 2025-12-25 02:32:08 +03:00
Code Issues Packages Projects Releases Wiki Activity

platform: dce: Add suspend resume hooks

Browse Source 
Add suspend resume hooks function and handling of sc7 events.

Bug 3583331
Bug 3826630

Signed-off-by: Mahesh Kumar <mahkumar@nvidia.com>
Change-Id: I920b02ad46a76330febe666fe17e8d328f744b1d
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2834856
Reviewed-by: Arun Swain <arswain@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2824218
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
This commit is contained in:
Mahesh Kumar
2022-05-19 15:01:13 +00:00
committed by Laxman Dewangan
parent 31b6d913ab
commit 75bfcf326d
10 changed files with 373 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

175
drivers/platform/tegra/dce/dce-pm.c Normal file
View File

@@ -0,0 +1,175 @@
/*
* Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include <dce.h>
#define CCPLEX_HSP_IE 1U /* TODO : Have an api to read from platform data */
static void dce_pm_save_state(struct tegra_dce *d)
{
d->sc7_state.hsp_ie = dce_hsp_ie_read(d, CCPLEX_HSP_IE);
}
static void dce_pm_restore_state(struct tegra_dce *d)
{
uint32_t val = d->sc7_state.hsp_ie;
dce_hsp_ie_write(d, val, CCPLEX_HSP_IE);
}
/**
* dce_resume_work_fn : execute resume and bootstrap flow
*
* @d : Pointer to tegra_dce struct.
*
* Return : void
*/
void dce_resume_work_fn(struct tegra_dce *d)
{
int ret = 0;
if (d == NULL) {
dce_err(d, "tegra_dce struct is NULL");
return;
}
ret = dce_fsm_post_event(d, EVENT_ID_DCE_BOOT_COMPLETE_REQUESTED, NULL);
if (ret) {
dce_err(d, "Error while posting DCE_BOOT_COMPLETE_REQUESTED event");
return;
}
ret = dce_start_boot_flow(d);
if (ret) {
dce_err(d, "DCE bootstrapping failed\n");
return;
}
}
/**
* dce_handle_sc7_enter_requested_event - callback handler function for event
* EVENT_ID_DCE_SC7_ENTER_REQUESTED
*
* @d : Pointer to tegra_dce struct.
* @params : callback params
*
* Return : 0 if successful else error code
*/
int dce_pm_handle_sc7_enter_requested_event(struct tegra_dce *d, void *params)
{
int ret = 0;
struct dce_ipc_message *msg = NULL;
msg = dce_admin_allocate_message(d);
if (!msg) {
dce_err(d, "IPC msg allocation failed");
goto out;
}
ret = dce_admin_send_enter_sc7(d, msg);
if (ret) {
dce_err(d, "Enter SC7 failed [%d]", ret);
goto out;
}
out:
dce_admin_free_message(d, msg);
return ret;
}
/**
* dce_handle_sc7_enter_received_event - callback handler function for event
* EVENT_ID_DCE_SC7_ENTER_RECEIVED
*
* @d : Pointer to tegra_dce struct.
* @params : callback params
*
* Return : 0 if successful else error code
*/
int dce_pm_handle_sc7_enter_received_event(struct tegra_dce *d, void *params)
{
dce_wakeup_interruptible(d, DCE_WAIT_SC7_ENTER);
return 0;
}
/**
* dce_handle_sc7_exit_received_event - callback handler function for event
* EVENT_ID_DCE_SC7_EXIT_RECEIVED
*
* @d : Pointer to tegra_dce struct.
* @params : callback params
*
* Return : 0 if successful else error code
*/
int dce_pm_handle_sc7_exit_received_event(struct tegra_dce *d, void *params)
{
dce_schedule_work(&d->dce_resume_work);
return 0;
}
int dce_pm_enter_sc7(struct tegra_dce *d)
{
int ret = 0;
struct dce_ipc_message *msg = NULL;
/*
* If Bootstrap is not yet done. Nothing to do during SC7 Enter
* Return success immediately.
*/
if (!dce_is_bootstrap_done(d)) {
dce_debug(d, "Bootstrap not done, Succeed SC7 enter\n");
goto out;
}
msg = dce_admin_allocate_message(d);
if (!msg) {
dce_err(d, "IPC msg allocation failed");
ret = -1;
goto out;
}
dce_pm_save_state(d);
ret = dce_admin_send_prepare_sc7(d, msg);
if (ret) {
dce_err(d, "Prepare SC7 failed [%d]", ret);
ret = -1;
goto out;
}
ret = dce_fsm_post_event(d, EVENT_ID_DCE_SC7_ENTER_REQUESTED, NULL);
if (ret) {
dce_err(d, "Error while posting SC7_ENTER event [%d]", ret);
ret = -1;
goto out;
}
out:
dce_admin_free_message(d, msg);
return ret;
}
int dce_pm_exit_sc7(struct tegra_dce *d)
{
int ret = 0;
dce_pm_restore_state(d);
ret = dce_fsm_post_event(d, EVENT_ID_DCE_SC7_EXIT_RECEIVED, NULL);
if (ret) {
dce_err(d, "Error while posting SC7_EXIT event [%d]", ret);
goto out;
}
out:
return ret;
}