While configuring the pipe during modeset, it should loop
starting from max clock and max lane count reducing the
lane count and clock in each iteration until the requested mode
rate is less than or equal to available link BW.
Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_dp.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index dfdbe65..e094b25 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1552,11 +1552,10 @@ intel_dp_compute_config(struct intel_encoder *encoder,
for (; bpp >= 6*3; bpp -= 2*3) {
mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
bpp);
-
- for (clock = min_clock; clock <= max_clock; clock++) {
- for (lane_count = min_lane_count;
- lane_count <= max_lane_count;
- lane_count <<= 1) {
+ for (clock = max_clock; clock >= max_clock; clock--) {
+ for (lane_count = max_lane_count;
+ lane_count >= min_lane_count;
+ lane_count >>= 1) {
link_clock = common_rates[clock];
link_avail = intel_dp_max_data_rate(link_clock,
--
1.9.1
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