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drm/i915/dp_link_caps: Factor out helper to get link config by index

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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.

Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260701153204.4124150-3-imre.deak@intel.com
This commit is contained in:
Imre Deak 2026-07-01 18:31:31 +03:00
parent ee8f7484f9
commit 87b7964494
1 changed files with 14 additions and 4 deletions
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18
drivers/gpu/drm/i915/display/intel_dp_link_caps.c
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@ -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,