From: "Guilherme G. Piccoli" <gpiccoli@igalia.com>
To: "Christian König" <christian.koenig@amd.com>,
"Alex Deucher" <alexdeucher@gmail.com>
Cc: "open list:EFIFB FRAMEBUFFER DRIVER"
<linux-fbdev@vger.kernel.org>, "xinhui pan" <Xinhui.Pan@amd.com>,
"Maling list - DRI developers" <dri-devel@lists.freedesktop.org>,
"Baoquan He" <bhe@redhat.com>,
"Samuel Iglesias Gonsálvez" <siglesias@igalia.com>,
kernel@gpiccoli.net, kexec@lists.infradead.org,
"amd-gfx list" <amd-gfx@lists.freedesktop.org>,
pjones@redhat.com, "Gerd Hoffmann" <kraxel@redhat.com>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Deucher, Alexander" <alexander.deucher@amd.com>,
"Dave Young" <dyoung@redhat.com>,
"Vivek Goyal" <vgoyal@redhat.com>
Subject: Re: Reuse framebuffer after a kexec (amdgpu / efifb)
Date: Fri, 10 Dec 2021 12:24:08 -0300 [thread overview]
Message-ID: <0847ff12-8b1c-a046-eb05-f0011f81e172@igalia.com> (raw)
In-Reply-To: <d1de6ca3-11ae-af9e-a2fb-7bcb6fae01d6@amd.com>
On 10/12/2021 12:13, Christian König wrote:
> [...]
> How about issuing a PCIe reset and re-initializing the ASIC with just
> the VBIOS?
>
> That should be pretty straightforward I think.
>
> Christian.
Thanks Christian, that'd be perfect! Is it feasible? Per Alex comment,
we'd need to run atombios commands to reprogram the timings, display
info, etc...like a small driver would do, a full init.
Also, what kind of PCIe reset is recommended for this adapter? Like a
hot reset, powering-off/re-power, FLR or that MODE2 reset present in
amdgpu code? Remembering this is an APU device.
Thanks a lot!
next prev parent reply other threads:[~2021-12-10 15:24 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-09 16:00 Reuse framebuffer after a kexec (amdgpu / efifb) Guilherme G. Piccoli
2021-12-09 16:09 ` Christian König
2021-12-09 17:31 ` Alex Deucher
2021-12-09 17:59 ` Guilherme G. Piccoli
2021-12-09 18:06 ` Alex Deucher
2021-12-09 18:17 ` Guilherme G. Piccoli
2021-12-09 19:20 ` Alex Deucher
2021-12-10 7:19 ` Gerd Hoffmann
2021-12-10 8:24 ` Thomas Zimmermann
2021-12-10 14:08 ` Guilherme G. Piccoli
2021-12-10 14:16 ` Alex Deucher
2021-12-10 14:25 ` Guilherme G. Piccoli
2021-12-10 15:13 ` Christian König
2021-12-10 15:24 ` Guilherme G. Piccoli [this message]
2021-12-10 15:32 ` Christian König
2021-12-10 19:11 ` Alex Deucher
2021-12-11 0:54 ` Felix Kuehling
2021-12-11 9:20 ` Gerd Hoffmann
2021-12-10 19:05 ` Alex Deucher
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