On Wed, Jul 15, 2026 at 10:34 AM Lijo Lazar <[email protected]> wrote: > > If a valid signature is seen at the default offset, use the default > size/offset for discovery. > > Fixes: 01bdc7e219c4 ("drm/amdgpu: New interface to get IP discovery binary > v3") > Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5447 > > Signed-off-by: Lijo Lazar <[email protected]>
Reviewed-by: Alex Deucher <[email protected]> > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c > b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c > index 44e7d2e3e6df..186661c94d8c 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c > @@ -334,6 +334,19 @@ static int amdgpu_discovery_get_tmr_info(struct > amdgpu_device *adev, > goto out; > } > } else { > + if (adev->discovery.offset) { > + u32 signature; > + > + /* If VRAM holds a valid discovery signature at the > default > + * discovery offset, use it as-is. > + */ > + amdgpu_device_vram_access(adev, > adev->discovery.offset, > + &signature, > sizeof(signature), > + false); > + if (le32_to_cpu(signature) == BINARY_SIGNATURE) > + goto out; > + } > + > tmr_size = RREG32(mmDRIVER_SCRATCH_2); > if (tmr_size) { > /* It's preferred to transition to PSP mailbox reg > interface > -- > 2.49.0 >
