I think you are getting lucky with the pageflip buffers always ending up in vram. Also, the legacy dce code (e.g., dce_v11_0.c) always pins in vram for modesets.
Alex ________________________________ From: Li, Samuel Sent: Friday, January 12, 2018 4:35 PM To: Koenig, Christian; Alex Deucher; [email protected] Cc: Deucher, Alexander Subject: RE: [PATCH] drm/amdgpu: only allow scatter/gather display with DC Somehow my test case seems working although DC not enabled? Regards, Samuel Li > -----Original Message----- > From: amd-gfx [mailto:[email protected]] On Behalf > Of Christian König > Sent: Friday, January 12, 2018 4:03 PM > To: Alex Deucher <[email protected]>; amd- > [email protected] > Cc: Deucher, Alexander <[email protected]> > Subject: Re: [PATCH] drm/amdgpu: only allow scatter/gather display with DC > > Am 12.01.2018 um 20:58 schrieb Alex Deucher: > > Check if DC is enabled before allowing scanout buffers to be pinned in > > system memory. > > > > Signed-off-by: Alex Deucher <[email protected]> > > Reviewed-by: Christian König <[email protected]> > > > --- > > drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 5 ++++- > > 1 file changed, 4 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c > > b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c > > index 8ede2645a06c..859942552e9f 100644 > > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c > > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c > > @@ -507,9 +507,12 @@ uint32_t > amdgpu_display_framebuffer_domains(struct amdgpu_device *adev) > > { > > uint32_t domain = AMDGPU_GEM_DOMAIN_VRAM; > > > > +#if defined(CONFIG_DRM_AMD_DC) > > if (adev->asic_type >= CHIP_CARRIZO && adev->asic_type < > CHIP_RAVEN && > > - adev->flags & AMD_IS_APU) > > + adev->flags & AMD_IS_APU && > > + amdgpu_device_asic_has_dc_support(adev->asic_type)) > > domain |= AMDGPU_GEM_DOMAIN_GTT; > > +#endif > > > > return domain; > > } > > _______________________________________________ > amd-gfx mailing list > [email protected] > https://lists.freedesktop.org/mailman/listinfo/amd-gfx
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