From: Huacai Chen <chenhuacai@loongson.cn>
To: David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org, dri-devel@lists.freedesktop.org,
Xuefeng Li <lixuefeng@loongson.cn>,
Huacai Chen <chenhuacai@gmail.com>,
Huacai Chen <chenhuacai@loongson.cn>
Subject: [PATCH V5 06/11] PCI/VGA: Update default VGA device again for X86/IA64
Date: Sat, 11 Sep 2021 17:30:51 +0800 [thread overview]
Message-ID: <20210911093056.1555274-7-chenhuacai@loongson.cn> (raw)
In-Reply-To: <20210911093056.1555274-1-chenhuacai@loongson.cn>
This patch is the third step of the rework: On X86 and IA64 platform,
update default VGA device if the new found device owns the firmware
framebuffer.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---
drivers/pci/vgaarb.c | 45 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)
diff --git a/drivers/pci/vgaarb.c b/drivers/pci/vgaarb.c
index 02b68810273a..c768365138b6 100644
--- a/drivers/pci/vgaarb.c
+++ b/drivers/pci/vgaarb.c
@@ -584,6 +584,14 @@ static void vga_arb_update_default_device(struct vga_device *vgadev)
struct pci_dev *pdev = vgadev->pdev;
struct device *dev = &pdev->dev;
struct vga_device *vgadev_default;
+#if defined(CONFIG_X86) || defined(CONFIG_IA64)
+ int i;
+ unsigned long flags;
+ u64 base = screen_info.lfb_base;
+ u64 size = screen_info.lfb_size;
+ u64 limit;
+ resource_size_t start, end;
+#endif
/*
* If we don't have a default VGA device yet, and this device owns
@@ -610,6 +618,43 @@ static void vga_arb_update_default_device(struct vga_device *vgadev)
vgaarb_info(dev, "overriding boot VGA device\n");
vga_set_default_device(pdev);
}
+
+#if defined(CONFIG_X86) || defined(CONFIG_IA64)
+ if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
+ base |= (u64)screen_info.ext_lfb_base << 32;
+
+ limit = base + size;
+
+ /*
+ * Override vga_arbiter_add_pci_device()'s I/O based detection
+ * as it may take the wrong device (e.g. on Apple system under
+ * EFI).
+ *
+ * Select the device owning the boot framebuffer if there is
+ * one.
+ */
+
+ /* Does firmware framebuffer belong to us? */
+ for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+ flags = pci_resource_flags(vgadev->pdev, i);
+
+ if ((flags & IORESOURCE_MEM) == 0)
+ continue;
+
+ start = pci_resource_start(vgadev->pdev, i);
+ end = pci_resource_end(vgadev->pdev, i);
+
+ if (!start || !end)
+ continue;
+
+ if (base < start || limit >= end)
+ continue;
+
+ if (vgadev->pdev != vga_default_device())
+ vgaarb_info(dev, "overriding boot device\n");
+ vga_set_default_device(vgadev->pdev);
+ }
+#endif
}
/*
--
2.27.0
next prev parent reply other threads:[~2021-09-11 9:36 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-11 9:30 [PATCH V5 00/11] PCI/VGA: Rework default VGA device selection Huacai Chen
2021-09-11 9:30 ` [PATCH V5 01/11] PCI/VGA: Move vgaarb to drivers/pci Huacai Chen
2021-09-11 9:30 ` [PATCH V5 02/11] PCI/VGA: Prefer vga_default_device() Huacai Chen
2021-09-11 9:30 ` [PATCH V5 03/11] PCI/VGA: Move vga_arb_integrated_gpu() earlier in file Huacai Chen
2021-09-11 9:30 ` [PATCH V5 04/11] PCI/VGA: Split out vga_arb_update_default_device() Huacai Chen
2021-09-11 9:30 ` [PATCH V5 05/11] PCI/VGA: Update default VGA device if a better one found Huacai Chen
2021-09-11 9:30 ` Huacai Chen [this message]
2021-09-11 9:30 ` [PATCH V5 07/11] PCI/VGA: Remove vga_arb_select_default_device() Huacai Chen
2021-09-11 9:30 ` [PATCH V5 08/11] PCI/VGA: Remove empty vga_arb_device_card_gone() Huacai Chen
2021-09-11 9:30 ` [PATCH V5 09/11] PCI/VGA: Log bridge control messages when adding devices Huacai Chen
2021-09-11 9:30 ` [PATCH V5 10/11] PCI/VGA: Use unsigned format string to print lock counts Huacai Chen
2021-09-11 9:30 ` [PATCH V5 11/11] PCI/VGA: Replace full MIT license text with SPDX identifier Huacai Chen
2021-09-14 19:18 ` [PATCH V5 00/11] PCI/VGA: Rework default VGA device selection Bjorn Helgaas
2021-09-16 8:28 ` Huacai Chen
2021-09-16 8:28 ` Huacai Chen
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