diff options
| -rw-r--r-- | drivers/gpu/drm/i915/gt/uc/intel_uc.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c index 6f0b9e05a5f6..10978e7ff06d 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c @@ -400,6 +400,15 @@ err_out: return err; } +static bool uc_is_wopcm_locked(struct intel_uc *uc) +{ + struct intel_gt *gt = uc_to_gt(uc); + struct intel_uncore *uncore = gt->uncore; + + return (intel_uncore_read(uncore, GUC_WOPCM_SIZE) & GUC_WOPCM_SIZE_LOCKED) || + (intel_uncore_read(uncore, DMA_GUC_WOPCM_OFFSET) & GUC_WOPCM_OFFSET_VALID); +} + int intel_uc_init_hw(struct intel_uc *uc) { struct drm_i915_private *i915 = uc_to_gt(uc)->i915; @@ -410,11 +419,19 @@ int intel_uc_init_hw(struct intel_uc *uc) if (!intel_uc_supports_guc(uc)) return 0; - if (!intel_uc_uses_guc(uc)) + /* + * We can silently continue without GuC only if it was never enabled + * before on this system after reboot, otherwise we risk GPU hangs. + * To check if GuC was loaded before we look at WOPCM registers. + */ + if (!intel_uc_uses_guc(uc) && !uc_is_wopcm_locked(uc)) return 0; if (!intel_uc_fw_is_available(&guc->fw)) { - ret = intel_uc_fw_status_to_error(guc->fw.status); + ret = uc_is_wopcm_locked(uc) || + intel_uc_fw_is_overridden(&guc->fw) || + intel_uc_supports_guc_submission(uc) ? + intel_uc_fw_status_to_error(guc->fw.status) : 0; goto err_out; } @@ -507,6 +524,12 @@ err_log_capture: err_out: __uc_sanitize(uc); + if (!ret) { + dev_notice(i915->drm.dev, "GuC is uninitialized\n"); + /* We want to run without GuC submission */ + return 0; + } + i915_probe_error(i915, "GuC initialization failed %d\n", ret); /* We want to keep KMS alive */ |