From: Bjorn Helgaas <helgaas@kernel.org>
To: David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>
Cc: Xuefeng Li <lixuefeng@loongson.cn>,
Huacai Chen <chenhuacai@gmail.com>,
Huacai Chen <chenhuacai@loongson.cn>,
linux-pci@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, Bjorn Helgaas <bhelgaas@google.com>
Subject: [PATCH v8 08/10] vgaarb: Log bridge control messages when adding devices
Date: Wed, 5 Jan 2022 18:06:56 -0600 [thread overview]
Message-ID: <20220106000658.243509-9-helgaas@kernel.org> (raw)
In-Reply-To: <20220106000658.243509-1-helgaas@kernel.org>
From: Huacai Chen <chenhuacai@loongson.cn>
Previously vga_arb_device_init() iterated through all VGA devices and
indicated whether legacy VGA routing to each could be controlled by an
upstream bridge.
But we determine that information in vga_arbiter_add_pci_device(), which we
call for every device, so we can log it there without iterating through the
VGA devices again.
Note that we call vga_arbiter_check_bridge_sharing() before adding the
device to vga_list, so we have to handle the very first device separately.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/gpu/vga/vgaarb.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c
index 455cf048fae8..b7e6c1228fff 100644
--- a/drivers/gpu/vga/vgaarb.c
+++ b/drivers/gpu/vga/vgaarb.c
@@ -719,8 +719,10 @@ static void vga_arbiter_check_bridge_sharing(struct vga_device *vgadev)
vgadev->bridge_has_one_vga = true;
- if (list_empty(&vga_list))
+ if (list_empty(&vga_list)) {
+ vgaarb_info(&vgadev->pdev->dev, "bridge control possible\n");
return;
+ }
/* okay iterate the new devices bridge hierarachy */
new_bus = vgadev->pdev->bus;
@@ -759,6 +761,11 @@ static void vga_arbiter_check_bridge_sharing(struct vga_device *vgadev)
}
new_bus = new_bus->parent;
}
+
+ if (vgadev->bridge_has_one_vga)
+ vgaarb_info(&vgadev->pdev->dev, "bridge control possible\n");
+ else
+ vgaarb_info(&vgadev->pdev->dev, "no bridge control possible\n");
}
/*
@@ -1557,7 +1564,6 @@ static int __init vga_arb_device_init(void)
{
int rc;
struct pci_dev *pdev;
- struct vga_device *vgadev;
rc = misc_register(&vga_arb_device);
if (rc < 0)
@@ -1573,15 +1579,6 @@ static int __init vga_arb_device_init(void)
PCI_ANY_ID, pdev)) != NULL)
vga_arbiter_add_pci_device(pdev);
- list_for_each_entry(vgadev, &vga_list, list) {
- struct device *dev = &vgadev->pdev->dev;
-
- if (vgadev->bridge_has_one_vga)
- vgaarb_info(dev, "bridge control possible\n");
- else
- vgaarb_info(dev, "no bridge control possible\n");
- }
-
pr_info("loaded\n");
return rc;
}
--
2.25.1
next prev parent reply other threads:[~2022-01-06 0:07 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-06 0:06 [PATCH v8 00/10] vgaarb: Rework default VGA device selection Bjorn Helgaas
2022-01-06 0:06 ` [PATCH v8 01/10] vgaarb: Move vga_arb_integrated_gpu() earlier in file Bjorn Helgaas
2022-01-06 0:06 ` [PATCH v8 02/10] vgaarb: Factor out vga_select_framebuffer_device() Bjorn Helgaas
2022-01-06 0:06 ` [PATCH v8 03/10] vgaarb: Factor out default VGA device selection Bjorn Helgaas
2022-01-06 0:06 ` [PATCH v8 04/10] vgaarb: Move framebuffer detection to ADD_DEVICE path Bjorn Helgaas
2022-01-06 6:44 ` Huacai Chen
2022-01-06 16:20 ` Bjorn Helgaas
2022-01-25 2:51 ` Huacai Chen
2022-01-25 15:38 ` Bjorn Helgaas
2022-01-26 2:25 ` Huacai Chen
2022-01-06 0:06 ` [PATCH v8 05/10] vgaarb: Move non-legacy VGA " Bjorn Helgaas
2022-01-06 0:06 ` [PATCH v8 06/10] vgaarb: Move disabled VGA device " Bjorn Helgaas
2022-01-06 0:06 ` [PATCH v8 07/10] vgaarb: Remove empty vga_arb_device_card_gone() Bjorn Helgaas
2022-01-06 0:06 ` Bjorn Helgaas [this message]
2022-01-06 0:06 ` [PATCH v8 09/10] vgaarb: Use unsigned format string to print lock counts Bjorn Helgaas
2022-01-06 0:06 ` [PATCH v8 10/10] vgaarb: Replace full MIT license text with SPDX identifier Bjorn Helgaas
2022-01-06 16:30 ` [PATCH v8 00/10] vgaarb: Rework default VGA device selection Bjorn Helgaas
2022-01-08 3:26 ` Huacai Chen
2022-01-31 22:23 ` Bjorn Helgaas
2022-02-01 15:46 ` Maarten Lankhorst
2022-02-07 17:59 ` Bjorn Helgaas
2022-02-08 2:14 ` Huacai Chen
2022-02-14 16:19 ` Bjorn Helgaas
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