[Intel-gfx] [PATCH 6/9] drm/i915: Update intel_dp_compute_config() to handle compliance test requests

[Todd Previte]

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

V2:
- N/A
V3:
- Moved color range check down under the compliance_exit tag

Signed-off-by: Todd Previte <tprevite at gmail.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 38 +++++++++++++++++++++++++++-----------
 1 file changed, 27 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index e69cdad..2d83f13 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1191,6 +1191,21 @@ intel_dp_compute_config(struct intel_encoder *encoder,
 	pipe_config->has_drrs = false;
 	pipe_config->has_audio = intel_dp->has_audio;
 
+	/* Compliance testing should skip most of this function */
+	if (!is_edp(intel_dp) && intel_dp->compliance_testing_active) {
+		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);
@@ -1251,6 +1266,18 @@ intel_dp_compute_config(struct intel_encoder *encoder,
 	return false;
 
 found:
+	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);
+
+	DRM_DEBUG_KMS("DP link bw %02x lane count %d clock %d bpp %d\n",
+		      intel_dp->link_bw, intel_dp->lane_count,
+		      pipe_config->port_clock, bpp);
+	DRM_DEBUG_KMS("DP link bw required %i available %i\n",
+		      mode_rate, link_avail);
+
+compliance_exit:
 	if (intel_dp->color_range_auto) {
 		/*
 		 * See:
@@ -1266,17 +1293,6 @@ found:
 	if (intel_dp->color_range)
 		pipe_config->limited_color_range = true;
 
-	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);
-
-	DRM_DEBUG_KMS("DP link bw %02x lane count %d clock %d bpp %d\n",
-		      intel_dp->link_bw, intel_dp->lane_count,
-		      pipe_config->port_clock, bpp);
-	DRM_DEBUG_KMS("DP link bw required %i available %i\n",
-		      mode_rate, link_avail);
-
 	intel_link_compute_m_n(bpp, lane_count,
 			       adjusted_mode->crtc_clock,
 			       pipe_config->port_clock,
-- 
1.9.1