Re: [PATCH V4 00/10] PCI/VGA: Rework default VGA device selection

[Bjorn Helgaas <helgaas@kernel.org>]

On Fri, Aug 27, 2021 at 04:31:19PM +0800, Huacai Chen wrote:
> My original work is at [1].
> 
> Bjorn do some rework and extension in V2. It moves the VGA arbiter to
> the PCI subsystem, fixes a few nits, and breaks a few pieces to make
> the main patch a little smaller.
> 
> V3 rewrite the commit log of the last patch (which is also summarized
> by Bjorn).
> 
> V4 split the last patch to two steps.
> 
> All comments welcome!

I'm hoping to apply something like this for v5.16.

BUT as I mentioned in [2], I want the very first patch to be the very
simple 2-line change to vga_arb_update_default_device() that actually
fixes your problem.

It makes no sense for that change to be at the very end, hidden in the
middle of a bigger restructuring patch.

[2] https://lore.kernel.org/r/20210825201704.GA3600046@bjorn-Precision-5520

> [1] https://lore.kernel.org/dri-devel/20210705100503.1120643-1-chenhuacai@loongson.cn/
> 
> Bjorn Helgaas (4):
>   PCI/VGA: Move vgaarb to drivers/pci
>   PCI/VGA: Replace full MIT license text with SPDX identifier
>   PCI/VGA: Use unsigned format string to print lock counts
>   PCI/VGA: Remove empty vga_arb_device_card_gone()
> 
> Huacai Chen (6):
>   PCI/VGA: Move vga_arb_integrated_gpu() earlier in file
>   PCI/VGA: Prefer vga_default_device()
>   PCI/VGA: Split out vga_arb_update_default_device()
>   PCI/VGA: Log bridge control messages when adding devices
>   PCI/VGA: Rework default VGA device selection (Step 1)
>   PCI/VGA: Rework default VGA device selection (Step 2)
> 
> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> 
> ---
>  drivers/gpu/vga/Kconfig           |  19 ---
>  drivers/gpu/vga/Makefile          |   1 -
>  drivers/pci/Kconfig               |  19 +++
>  drivers/pci/Makefile              |   1 +
>  drivers/{gpu/vga => pci}/vgaarb.c | 269 ++++++++++++------------------
>  5 files changed, 126 insertions(+), 183 deletions(-)
>  rename drivers/{gpu/vga => pci}/vgaarb.c (90%)
> --
> 2.27.0
>