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gpu: nvgpu: disable nvgpu rpm if genpd support is not available

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GPU is set to always ON state on safety L4T for SMCU to not fault.
However, nvgpu railgating was always enabled. This will lead to
improper GPU railgate/unrailgate sequence as bpmp will not
powergate/ungate the gpu on suspend and resume requests.

Keeping rpm enabled can lead to ACR failure on resume as it expects
the GPU to be reset on every resume.

Disable nvgpu runtime PM when the power domain node for the gpu is
not defined.

Bug 4111746

Change-Id: I9215ea87dbfbf53360003cac5f8a51d39982ace9
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2904335
(cherry picked from commit c066401be7)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2908071
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Mahantesh Kumbar <mkumbar@nvidia.com>
Reviewed-by: Ankur Kishore <ankkishore@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Sagar Kamble
2023-05-15 15:51:37 +05:30
committed by mobile promotions
parent 3407c01357
commit 878182c1d5
1 changed files with 14 additions and 2 deletions
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16
drivers/gpu/nvgpu/os/linux/driver_common.c
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2016-2022, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2016-2023, NVIDIA CORPORATION. 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,
@@ -190,7 +190,8 @@ static void nvgpu_init_timeslice(struct gk20a *g)
static void nvgpu_init_pm_vars(struct gk20a *g)
{
struct gk20a_platform *platform = dev_get_drvdata(dev_from_gk20a(g));
struct device *dev = dev_from_gk20a(g);
struct gk20a_platform *platform = dev_get_drvdata(dev);
/*
* Set up initial power settings. For non-slicon platforms, disable
@@ -246,6 +247,17 @@ static void nvgpu_init_pm_vars(struct gk20a *g)
/* Always enable railgating on simulation platform */
platform->can_railgate_init = nvgpu_platform_is_simulation(g) ?
true : platform->can_railgate_init;
/*
* Disable railgating if GPU power domain node is not defined
* in the DT as bpmp will not powergate/ungate the GPU on
* suspend/resume and can lead to ACR failure on resume
* as it expects GPU to be reset on every resume.
*/
if (!of_property_read_bool(dev->of_node, "power-domains")) {
platform->can_railgate_init = false;
}
nvgpu_set_enabled(g, NVGPU_CAN_RAILGATE,
platform->can_railgate_init);
}