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drm/i915/gvt: Fix vfio_edid issue for BXT/APL
commit 4ceb06e 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: 642403e ("drm/i915/gvt: Temporarily disable vfio_edid for BXT/APL") Signed-off-by: Colin Xu <colin.xu@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20201201060329.142375-1-colin.xu@intel.com Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com> (cherry picked from commit 4ceb06e) Signed-off-by: Colin Xu <colin.xu@intel.com> Cc: <stable@vger.kernel.org> # 5.4.y Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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