diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_link_training.h')
-rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_training.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.h b/drivers/gpu/drm/i915/display/intel_dp_link_training.h new file mode 100644 index 000000000..7fa1c0833 --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2019 Intel Corporation + */ + +#ifndef __INTEL_DP_LINK_TRAINING_H__ +#define __INTEL_DP_LINK_TRAINING_H__ + +#include <drm/display/drm_dp_helper.h> + +struct intel_crtc_state; +struct intel_dp; + +int intel_dp_init_lttpr_and_dprx_caps(struct intel_dp *intel_dp); + +void intel_dp_get_adjust_train(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state, + enum drm_dp_phy dp_phy, + const u8 link_status[DP_LINK_STATUS_SIZE]); +void intel_dp_program_link_training_pattern(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state, + enum drm_dp_phy dp_phy, + u8 dp_train_pat); +void intel_dp_set_signal_levels(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state, + enum drm_dp_phy dp_phy); +void intel_dp_start_link_train(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state); +void intel_dp_stop_link_train(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state); + +void +intel_dp_dump_link_status(struct intel_dp *intel_dp, enum drm_dp_phy dp_phy, + const u8 link_status[DP_LINK_STATUS_SIZE]); + +/* Get the TPSx symbol type of the value programmed to DP_TRAINING_PATTERN_SET */ +static inline u8 intel_dp_training_pattern_symbol(u8 pattern) +{ + return pattern & ~DP_LINK_SCRAMBLING_DISABLE; +} + +#endif /* __INTEL_DP_LINK_TRAINING_H__ */ |