drm/i915: Plumb crtc_state to link training

Get rid of mode crtc->config usage, and some ad-hoc intel_dp state
usage by plumbing the crtc state all the way down to the link training
code.

Unfortunately we do have to keep some cached state in intel_dp so
that we can do the "does the link need retraining?" checks from
the short hpd handler.

v2: Add intel_crtc_state forward declaration
v3: Don't kill the PHY test code totally since it's
    now in the hotplug work where we can get at the states
v4: Don't resurrect the debug scrambling disable bit (Imre)
    Use intel_dp_mst_is_master_trans() (Imre)

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201001111053.24451-1-ville.syrjala@linux.intel.com

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.h b/drivers/gpu/drm/i915/display/intel_ddi.h
index f5fb62fc9400..9a2ac73164f8 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.h
+++ b/drivers/gpu/drm/i915/display/intel_ddi.h
@@ -41,8 +41,10 @@ void intel_ddi_set_vc_payload_alloc(const struct intel_crtc_state *crtc_state,
 				    bool state);
 void intel_ddi_compute_min_voltage_level(struct drm_i915_private *dev_priv,
 					 struct intel_crtc_state *crtc_state);
-u32 bxt_signal_levels(struct intel_dp *intel_dp);
-u32 ddi_signal_levels(struct intel_dp *intel_dp);
+u32 bxt_signal_levels(struct intel_dp *intel_dp,
+		      const struct intel_crtc_state *crtc_state);
+u32 ddi_signal_levels(struct intel_dp *intel_dp,
+		      const struct intel_crtc_state *crtc_state);
 int intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder,
 				     enum transcoder cpu_transcoder,
 				     bool enable);