diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_params.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_params.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp_link_training.c | 6 |
3 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index 0e280fbd52f1..3970540b8933 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -63,8 +63,12 @@ struct i915_params i915 __read_mostly = { .inject_load_failure = 0, .enable_dpcd_backlight = false, .enable_gvt = false, + .train_fail = 0, }; +module_param_named(train_fail, i915.train_fail, int, 0600); +MODULE_PARM_DESC(modeset, "fail link training clock recovery on the next N attempts, default 0"); + module_param_named(modeset, i915.modeset, int, 0400); MODULE_PARM_DESC(modeset, "Use kernel modesetting [KMS] (0=disable, " diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h index 8e433de04679..846d4349167f 100644 --- a/drivers/gpu/drm/i915/i915_params.h +++ b/drivers/gpu/drm/i915/i915_params.h @@ -66,6 +66,7 @@ struct i915_params { bool enable_dp_mst; bool enable_dpcd_backlight; bool enable_gvt; + int train_fail; }; extern struct i915_params i915 __read_mostly; diff --git a/drivers/gpu/drm/i915/intel_dp_link_training.c b/drivers/gpu/drm/i915/intel_dp_link_training.c index 2a6795bfae6f..933e32032178 100644 --- a/drivers/gpu/drm/i915/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/intel_dp_link_training.c @@ -176,6 +176,12 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp) return false; } + if (i915.train_fail > 0) { + DRM_ERROR("injecting clock recovery fail\n"); + i915.train_fail--; + return false; + } + if (drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { DRM_DEBUG_KMS("clock recovery OK\n"); return true; |