41 lines
1.5 KiB
Diff
41 lines
1.5 KiB
Diff
From a9b9b0912a84e57d91285b29ce3eb8823e1d053d Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Mario=20B=C4=83l=C4=83nic=C4=83?=
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<mariobalanica02@gmail.com>
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Date: Tue, 12 Dec 2023 03:12:12 +0200
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Subject: [PATCH 04/16] Platform/RaspberryPi: Fix framebuffer base translation
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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On RPi 5, the firmware already returns a CPU address to the framebuffer.
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We need to mask off the VC bus alias so that it's only subtracted when
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present.
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Display now works, with a few caveats:
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- the depth does not update from 16 to 32-bit anymore. It's necessary
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to add "framebuffer_depth=32" in config.txt.
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- no resolutions higher than 1080p.
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Signed-off-by: Mario Bălănică <mariobalanica02@gmail.com>
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---
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Platform/RaspberryPi/Drivers/RpiFirmwareDxe/RpiFirmwareDxe.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/Platform/RaspberryPi/Drivers/RpiFirmwareDxe/RpiFirmwareDxe.c b/Platform/RaspberryPi/Drivers/RpiFirmwareDxe/RpiFirmwareDxe.c
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index 91f581ef..9077f077 100644
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--- a/Platform/RaspberryPi/Drivers/RpiFirmwareDxe/RpiFirmwareDxe.c
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+++ b/Platform/RaspberryPi/Drivers/RpiFirmwareDxe/RpiFirmwareDxe.c
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@@ -754,7 +754,7 @@ RpiFirmwareAllocFb (
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}
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*Pitch = Cmd->Pitch.Pitch;
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- *FbBase = Cmd->AllocFb.AlignmentBase - PcdGet64 (PcdDmaDeviceOffset);
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+ *FbBase = Cmd->AllocFb.AlignmentBase & ~PcdGet64 (PcdDmaDeviceOffset);
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*FbSize = Cmd->AllocFb.Size;
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ReleaseSpinLock (&mMailboxLock);
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--
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2.51.2
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