diff options
authorZhenyu Wang <>2020-09-14 11:03:02 +0800
committerGreg Kroah-Hartman <>2020-10-07 08:02:54 +0200
commitecd72c95c2786d4eb73786922964ec0b707f1c3e (patch)
parent115b0aed8b749e9435210d5b1d23ac16fa6658ef (diff)
drm/i915/gvt: Fix port number for BDW on EDID region setup
commit 28284943ac94014767ecc2f7b3c5747c4a5617a0 upstream. Current BDW virtual display port is initialized as PORT_B, so need to use same port for VFIO EDID region, otherwise invalid EDID blob pointer is assigned which caused kernel null pointer reference. We might evaluate actual display hotplug for BDW to make this function work as expected, anyway this is always required to be fixed first. Reported-by: Alejandro Sior <> Cc: Alejandro Sior <> Fixes: 0178f4ce3c3b ("drm/i915/gvt: Enable vfio edid for all GVT supported platform") Reviewed-by: Hang Yuan <> Signed-off-by: Zhenyu Wang <> Link: Signed-off-by: Greg Kroah-Hartman <>
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
index 7d361623ff67..041f601b07d0 100644
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -367,6 +367,7 @@ void intel_gvt_destroy_idle_vgpu(struct intel_vgpu *vgpu)
static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
struct intel_vgpu_creation_params *param)
+ struct drm_i915_private *dev_priv = gvt->gt->i915;
struct intel_vgpu *vgpu;
int ret;
@@ -434,7 +435,10 @@ static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
if (ret)
goto out_clean_sched_policy;
- ret = intel_gvt_hypervisor_set_edid(vgpu, PORT_D);
+ if (IS_BROADWELL(dev_priv))
+ ret = intel_gvt_hypervisor_set_edid(vgpu, PORT_B);
+ else
+ ret = intel_gvt_hypervisor_set_edid(vgpu, PORT_D);
if (ret)
goto out_clean_sched_policy;