On Wed, Mar 17, 2021 at 10:55:04AM +0800, Colin Xu wrote:
> commit 4ceb06e7c336f4a8d3f3b6ac9a4fea2e9c97dc07 upstream
>
> BXT/APL has different isr/irr/hpd regs compared with other GEN9. If not
> setting these regs bits correctly according to the emulated monitor
> (currently a DP on PORT_B), although gvt still triggers a virtual HPD
> event, the guest driver won't detect a valid HPD pulse thus no full
> display detection will be executed to read the updated EDID.
>
> With this patch, the vfio_edid is enabled again on BXT/APL, which is
> previously disabled.
>
> Fixes: 642403e3599e ("drm/i915/gvt: Temporarily disable vfio_edid for BXT/APL")
> Signed-off-by: Colin Xu <colin.xu@xxxxxxxxx>
> Signed-off-by: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
> Link: http://patchwork.freedesktop.org/patch/msgid/20201201060329.142375-1-colin.xu@xxxxxxxxx
> Reviewed-by: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
> (cherry picked from commit 4ceb06e7c336f4a8d3f3b6ac9a4fea2e9c97dc07)
> Signed-off-by: Colin Xu <colin.xu@xxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx> # 5.4.y
> ---
> drivers/gpu/drm/i915/gvt/display.c | 83 ++++++++++++++++++++++--------
> drivers/gpu/drm/i915/gvt/vgpu.c | 2 +-
> 2 files changed, 62 insertions(+), 23 deletions(-)
Can you also send a backport for 5.10.y for this patch as it is needed
there as well?
thanks,
greg k-h
