[PATCH v2 02/34] drm/i915/dp_link_caps: Factor out helper to get link config by index

[Imre Deak <imre.deak@intel.com>]

Factor out a helper that looks up a link configuration by index.
This provides the link configuration directly, avoiding the
indirect conversion via the packed config entry.

Signed-off-by: Imre Deak <imre.deak@intel.com>
---
 .../gpu/drm/i915/display/intel_dp_link_caps.c  | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_caps.c b/drivers/gpu/drm/i915/display/intel_dp_link_caps.c
index 2c656c2c036cc..d0a863b00b458 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_caps.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_caps.c
@@ -235,6 +235,16 @@ static int intel_dp_link_config_lane_count(const struct intel_dp_link_config_ent
 	return 1 << lce->lane_count_exp;
 }
 
+static void
+to_intel_dp_link_config(struct intel_dp_link_caps *link_caps,
+			int config_idx, struct intel_dp_link_config *config)
+{
+	const struct intel_dp_link_config_entry *lce = &link_caps->configs[config_idx];
+
+	config->rate = intel_dp_link_config_rate(link_caps, lce);
+	config->lane_count = intel_dp_link_config_lane_count(lce);
+}
+
 static void set_max_link_limits_no_update(struct intel_dp_link_caps *link_caps,
 					  const struct intel_dp_link_config *max_link_limits)
 {
@@ -401,15 +411,15 @@ void intel_dp_link_config_get(struct intel_dp_link_caps *link_caps,
 			      int idx, int *link_rate, int *lane_count)
 {
 	struct intel_display *display = to_intel_display(link_caps->dp);
-	const struct intel_dp_link_config_entry *lce;
+	struct intel_dp_link_config config;
 
 	if (drm_WARN_ON(display->drm, idx < 0 || idx >= link_caps->num_configs))
 		idx = 0;
 
-	lce = &link_caps->configs[idx];
+	to_intel_dp_link_config(link_caps, idx, &config);
 
-	*link_rate = intel_dp_link_config_rate(link_caps, lce);
-	*lane_count = intel_dp_link_config_lane_count(lce);
+	*link_rate = config.rate;
+	*lane_count = config.lane_count;
 }
 
 int intel_dp_link_config_index(struct intel_dp_link_caps *link_caps,
-- 
2.49.1