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gpu: nvgpu: don't skip setting same clk in arbiter

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In the current setting, clock arbiter skips setting
the clock if its already set previously. The value
set by the arbiter is stored in
"struct nvgpu_clk_arb->actual" whenever the clock is
updated via the arbiter. However, DVFS might also
update the clock and the updates are not synchronized
with the arbiter. Hence, ensure that any clock
requests are always updated i.e. the requested rate is
set even if the previous rate remains the same.

Bug 3666615

Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Change-Id: I32bf4dbf81b19fdd6fa0bdec3a6c9a9312b78eca
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2732364
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Debarshi Dutta
2022-06-13 12:18:42 +05:30
committed by mobile promotions
parent 2f3c1adad4
commit 0cecc5c5ab
1 changed files with 1 additions and 7 deletions
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8
drivers/gpu/nvgpu/common/clk_arb/clk_arb_gp10b.c
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@@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved. * Copyright (c) 2018-2022, NVIDIA CORPORATION. All rights reserved.
* *
* Permission is hereby granted, free of charge, to any person obtaining a * Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"), * copy of this software and associated documentation files (the "Software"),
@@ -305,12 +305,6 @@ void gp10b_clk_arb_run_arbiter_cb(struct nvgpu_clk_arb *arb)
gpc2clk_session_target = gpc2clk_target; gpc2clk_session_target = gpc2clk_target;
if (arb->actual->gpc2clk == gpc2clk_target) {
nvgpu_atomic_inc(&arb->req_nr);
nvgpu_cond_signal_interruptible(&arb->request_wq);
goto exit_arb;
}
nvgpu_mutex_acquire(&arb->pstate_lock); nvgpu_mutex_acquire(&arb->pstate_lock);
status = g->ops.clk.clk_get_round_rate(g, status = g->ops.clk.clk_get_round_rate(g,