[PATCH 2/2] drm/amd: Re-create firmware framebuffer on failure to probe

[Ernst Sjöstrand]

What about a system with multiple GPUs?
Hybrid graphics?
Headless systems?

Regards
//Ernst

Den tors 22 dec. 2022 kl 19:30 skrev Mario Limonciello <
mario.limonciello at amd.com>:

> If the probe sequence fails then the user is stuck with a frozen
> screen and can only really recover via SSH or by rebooting and
> applying nomodeset to the kernel command line.
>
> This is particularly problematic as newer GPUs are introduced because
> distributions may take some time to land newer GPU firmware.
>
> So when probe fails, re-create the system framebuffer so that the
> user at least has basic graphics support.
>
> Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index bf2d50c8c92a..8961c62ab29b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -40,6 +40,7 @@
>  #include <linux/cc_platform.h>
>  #include <linux/fb.h>
>  #include <linux/dynamic_debug.h>
> +#include <linux/sysfb.h>
>
>  #include "amdgpu.h"
>  #include "amdgpu_irq.h"
> @@ -2187,6 +2188,7 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
>
>  err_pci:
>         pci_disable_device(pdev);
> +       sysfb_enable();
>         return ret;
>  }
>
> --
> 2.34.1
>
>
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