If we fail during GEM initialisation, we scrub the HW state by performing a device level GPU resuet. However, we want to leave the system in a usable state (with functioning KMS but no GEM) so after scrubbing the HW state, we need to restore some sane defaults and re-enable the low-level common parts of the GPU (such as the GMCH).
Signed-off-by: Chris Wilson <[email protected]> --- drivers/gpu/drm/i915/i915_gem.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index a4031fab57b0..2b93fdd5a7a6 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -5608,7 +5608,10 @@ int i915_gem_init(struct drm_i915_private *dev_priv) "Failed to initialize GPU, declaring it wedged!\n"); i915_gem_set_wedged(dev_priv); } - ret = 0; + + /* Minimal basic recovery for KMS */ + ret = i915_ggtt_enable_hw(dev_priv); + intel_init_clock_gating(dev_priv); } i915_gem_drain_freed_objects(dev_priv); -- 2.18.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
