[PATCH 09/10] drm/i915: Update intel_dp_compute_config() to respond to Displayport compliance test requests appropriately

[Todd Previte <tprevite@gmail.com>]

Adds provisions in intel_dp_compute_config() to accommodate compliance testing. Mostly
this invovles circumventing the automatic link configuration paramters and allowing
the compliance code to set those parameters as required by the tests.

Signed-off-by: Todd Previte <tprevite@gmail.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index b7bdb5f..9da948c 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1117,6 +1117,21 @@ intel_dp_compute_config(struct intel_encoder *encoder,
 	pipe_config->has_drrs = false;
 	pipe_config->has_audio = intel_dp->has_audio;
 
+	/* Compliance testing can skip most of this function */
+	if (!is_edp(intel_dp) && intel_dp->compliance_testing_active) {
+		/* FIXME: Validate these parameters*/
+		bpp = intel_dp->compliance_config.bits_per_pixel;
+		lane_count = intel_dp->compliance_config.lane_count;
+		clock = intel_dp->compliance_config.link_rate >> 3;
+		/* Assign here and skip at the end - ensures correct values */
+		intel_dp->link_bw = bws[clock];
+		intel_dp->lane_count = lane_count;
+		pipe_config->pipe_bpp = bpp;
+		pipe_config->port_clock = drm_dp_bw_code_to_link_rate(intel_dp->link_bw);
+
+		goto compliance_exit;
+	}
+
 	if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
 		intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
 				       adjusted_mode);
@@ -1203,6 +1218,7 @@ found:
 	DRM_DEBUG_KMS("DP link bw required %i available %i\n",
 		      mode_rate, link_avail);
 
+compliance_exit:
 	intel_link_compute_m_n(bpp, lane_count,
 			       adjusted_mode->crtc_clock,
 			       pipe_config->port_clock,
-- 
1.9.1