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39 lines
1.4 KiB
Diff
39 lines
1.4 KiB
Diff
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From ae03b35cf2792e7c4cf55c44dc37322487b72d1d Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Thu, 18 Nov 2021 14:04:00 +0100
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Subject: [PATCH] drm/vc4: kms: Take old state core clock rate into
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account
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During a commit, the core clock, which feeds the HVS, needs to run at
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a minimum of 500MHz.
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While doing that commit, we can also change the mode to one that
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requires a higher core clock, so we take the core clock rate associated
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to that new state into account for that boost.
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However, the old state also needs to be taken into account if it
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requires a core clock higher that the new one and our 500MHz limit,
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since it's still live in hardware at the beginning of our commit.
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Fixes: 16e101051f32 ("drm/vc4: Increase the core clock based on HVS load")
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/gpu/drm/vc4/vc4_kms.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_kms.c
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+++ b/drivers/gpu/drm/vc4/vc4_kms.c
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@@ -390,9 +390,10 @@ static void vc4_atomic_commit_tail(struc
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}
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if (vc4->hvs && vc4->hvs->hvs5) {
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+ unsigned long state_rate = max(old_hvs_state->core_clock_rate,
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+ new_hvs_state->core_clock_rate);
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unsigned long core_rate = max_t(unsigned long,
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- 500000000,
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- new_hvs_state->core_clock_rate);
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+ 500000000, state_rate);
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core_req = clk_request_start(hvs->core_clk, core_rate);
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/*
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