48 lines
1.4 KiB
Diff
48 lines
1.4 KiB
Diff
From aa04e2b9f63aae953040816306a45bdf86a2195f Mon Sep 17 00:00:00 2001
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From: Leah Rowe <info@minifree.org>
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Date: Thu, 22 Feb 2024 17:52:03 +0000
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Subject: [PATCH 1/1] nb/haswell: disable igpu when dgpu is used
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normally, this is done with haswell mrc, which handles
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that, but when using broadwell, the igpu is not disabled,
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and legacy vga cycles are not routed to the dgpu
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add this behaviour in gma.g for broadwell mrc.bin
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tested on dell optiplex 9020 sff
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Signed-off-by: Leah Rowe <info@minifree.org>
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---
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src/northbridge/intel/haswell/gma.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/src/northbridge/intel/haswell/gma.c b/src/northbridge/intel/haswell/gma.c
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index 6e6948b70f..ee4d321261 100644
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--- a/src/northbridge/intel/haswell/gma.c
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+++ b/src/northbridge/intel/haswell/gma.c
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@@ -461,12 +461,21 @@ static void gma_generate_ssdt(const struct device *dev)
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drivers_intel_gma_displays_ssdt_generate(&chip->gfx);
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}
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+static void gma_func0_disable(struct device *dev)
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+{
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+ /* Disable VGA decode */
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+ pci_or_config16(pcidev_on_root(0, 0), GGC, 1 << 1);
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+
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+ dev->enabled = 0;
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+}
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+
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static struct device_operations gma_func0_ops = {
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.read_resources = pci_dev_read_resources,
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.set_resources = pci_dev_set_resources,
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.enable_resources = pci_dev_enable_resources,
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.init = gma_func0_init,
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.acpi_fill_ssdt = gma_generate_ssdt,
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+ .vga_disable = gma_func0_disable,
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.ops_pci = &pci_dev_ops_pci,
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};
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--
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2.39.2
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