[PATCH 1/2] drm/i915/dp: Force the lane count to 4 always

[Manasi Navare]

Issue: https://gitlab.freedesktop.org/drm/intel/issues/585
Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 991f343579ef..d299cee175e7 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1980,12 +1980,15 @@ static int intel_dp_output_bpp(const struct intel_crtc_state *crtc_state, int bp
 static int
 intel_dp_compute_link_config_wide(struct intel_dp *intel_dp,
 				  struct intel_crtc_state *pipe_config,
-				  const struct link_config_limits *limits)
+				  struct link_config_limits *limits)
 {
 	struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
 	int bpp, clock, lane_count;
 	int mode_rate, link_clock, link_avail;
 
+	// Test for Issue 585
+	limits->min_lane_count = limits->max_lane_count;
+
 	for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
 		int output_bpp = intel_dp_output_bpp(pipe_config, bpp);
 
-- 
2.19.1