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fix bo create failure when run with prelim kernel #98

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fix bo create failure when run with prelim kernel #98

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23 changes: 23 additions & 0 deletions i915.c
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Original file line number Diff line number Diff line change
Expand Up @@ -181,6 +181,16 @@ bool i915_has_tile4(struct driver *drv)
return i915->genx10 >= 125;
}

bool i915_should_use_linear(struct i915_device *i915)
{
switch (i915->device_id) {
case 0x46A6:
return true;
default:
return false;
}
}

static uint64_t unset_flags(uint64_t current_flags, uint64_t mask)
{
uint64_t value = current_flags & ~mask;
Expand Down Expand Up @@ -282,6 +292,19 @@ static int i915_add_combinations(struct driver *drv)
render = unset_flags(render, linear_mask | camera_mask);
scanout_and_render = unset_flags(scanout_and_render, linear_mask |camera_mask);

/* TODO(OAM-115771):
* Some devices virtio has VIRTIO_GPU_F_MODIFIER feature,
* but some devices have not. If device virtio has not
* VIRTIO_GPU_F_MODIFIER, android display black screen with
* qemu + SRIOV. So far, we have not found out why device
* id of the two ADL device are both 0x46A6, one has
* VIRTIO_GPU_F_MODIFIER feature, the other one has not.
*
* For now, we use LINEAR as WA for the above devices with
* same device id.. */
if (is_kvm && i915_should_use_linear(i915)) {
scanout_and_render = unset_flags(scanout_and_render, BO_USE_SCANOUT);
}

/* On dGPU, only use linear */
if (i915->genx10 >= 125)
Expand Down
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