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8299d1f057
Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted patches, wireless patches and defconfig patches. bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 4B v1.1 4G bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
41 lines
1.4 KiB
Diff
41 lines
1.4 KiB
Diff
From f79e871c8d9fbe90b351f61b052878d98b999b1b Mon Sep 17 00:00:00 2001
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From: Dom Cobley <popcornmix@gmail.com>
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Date: Mon, 26 Jul 2021 18:07:25 +0100
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Subject: [PATCH] drm/vc4: Increase the core clock to a minimum of 500MHz
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The core clock needs to be raised temporarily during a modeset to
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500MHz. However, the HVS core clock requirement might be higher than
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500MHz. This rate will be enforced at the end of the mode setting,
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meaning that might might end up with a core clock rate lower than
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planned on the first mode set.
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Use the maximum value of 500MHz and the HVS core clock rate for our
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temporary boost to fix this issue.
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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 | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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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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@@ -348,11 +348,17 @@ vc4_atomic_complete_commit(struct drm_at
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}
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if (vc4->hvs && vc4->hvs->hvs5) {
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+ unsigned long core_rate = max_t(unsigned long,
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+ 500000000,
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+ hvs_state->core_clock_rate);
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+
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+ drm_dbg(dev, "Raising the core clock at %lu Hz\n", core_rate);
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+
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/*
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* Do a temporary request on the core clock during the
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* modeset.
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*/
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- core_req = clk_request_start(hvs->core_clk, 500000000);
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+ core_req = clk_request_start(hvs->core_clk, core_rate);
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/*
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* And remove the previous one based on the HVS
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