From 50bf865e7f620f5ed3b3f08514f9a325e5aa31f8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Mon, 13 Sep 2021 17:44:27 +0300
Subject: drm/i915: Extract intel_dp_need_bigjoiner()
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Git-commit: e0ccf1d6f1ef46456ff6d3744afb6a105a516817
Patch-mainline: v5.16-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

Suck the "do we need bigjoiner?" checks into a helper instead of
duplicating them in two differentt places.

v2: s/use/need/ (Jani)

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210913144440.23008-4-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index b9036b80493f..ed1eea550434 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -805,6 +805,17 @@ intel_dp_mode_valid_downstream(struct intel_connector *connector,
 	return MODE_OK;
 }
 
+static bool intel_dp_need_bigjoiner(struct intel_dp *intel_dp,
+				    int hdisplay, int clock)
+{
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+
+	if (!intel_dp_can_bigjoiner(intel_dp))
+		return false;
+
+	return clock > i915->max_dotclk_freq || hdisplay > 5120;
+}
+
 static enum drm_mode_status
 intel_dp_mode_valid(struct drm_connector *connector,
 		    struct drm_display_mode *mode)
@@ -840,8 +851,7 @@ intel_dp_mode_valid(struct drm_connector *connector,
 	if (mode->clock < 10000)
 		return MODE_CLOCK_LOW;
 
-	if ((target_clock > max_dotclk || mode->hdisplay > 5120) &&
-	    intel_dp_can_bigjoiner(intel_dp)) {
+	if (intel_dp_need_bigjoiner(intel_dp, mode->hdisplay, target_clock)) {
 		bigjoiner = true;
 		max_dotclk *= 2;
 	}
@@ -1457,9 +1467,8 @@ intel_dp_compute_link_config(struct intel_encoder *encoder,
 		    limits.max_lane_count, limits.max_rate,
 		    limits.max_bpp, adjusted_mode->crtc_clock);
 
-	if ((adjusted_mode->crtc_clock > i915->max_dotclk_freq ||
-	     adjusted_mode->crtc_hdisplay > 5120) &&
-	    intel_dp_can_bigjoiner(intel_dp))
+	if (intel_dp_need_bigjoiner(intel_dp, adjusted_mode->crtc_hdisplay,
+				    adjusted_mode->crtc_clock))
 		pipe_config->bigjoiner = true;
 
 	/*
-- 
2.38.1