diff options
| author | Imre Deak <imre.deak@intel.com> | 2026-07-01 18:31:40 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2026-07-09 10:25:12 +0300 |
| commit | cf65aa9de62a91f8dba7ce5cb08f262b3dd1b7ce (patch) | |
| tree | c0787776467e482ffe89d78513b9aa2293fb1d85 | |
| parent | ac24d562f490cbbca0280c2b5502e5502acdacc3 (diff) | |
drm/i915/dp_link_caps: Add debugfs entry showing allowed configurations
Add a debugfs entry showing the currently allowed link configurations
in the connector's iteration order.
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260701153204.4124150-12-imre.deak@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_caps.c | 40 |
1 files changed, 40 insertions, 0 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 3ef678d47c71..4482e1f9d6cd 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_caps.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_caps.c @@ -1123,6 +1123,43 @@ static int i915_dp_max_lane_count_show(void *data, u64 *val) } DEFINE_DEBUGFS_ATTRIBUTE(i915_dp_max_lane_count_fops, i915_dp_max_lane_count_show, NULL, "%llu\n"); +static int intel_dp_allowed_link_configs_show(struct seq_file *m, void *data) +{ + struct intel_connector *connector = to_intel_connector(m->private); + struct intel_display *display = to_intel_display(connector); + struct intel_dp *intel_dp = intel_attached_dp(connector); + struct intel_dp_link_caps *link_caps = intel_dp->link.caps; + struct intel_dp_link_config link_config; + struct intel_dp_link_caps_iter iter; + int err; + int i; + + err = drm_modeset_lock_single_interruptible(&display->drm->mode_config.connection_mutex); + if (err) + return err; + + intel_dp_flush_connector_commits(connector); + + i = 0; + intel_dp_link_caps_iter_start(&iter, + link_caps, + intel_dp_link_caps_connector_compute_order(connector), + INTEL_DP_LINK_CAPS_FILTER_ALL); + for_each_dp_link_config(&iter, &link_config) { + seq_printf(m, "%s%dx%d", + i ? " " : "", + link_config.lane_count, link_config.rate); + i++; + } + intel_dp_link_caps_iter_end(&iter); + + drm_modeset_unlock(&display->drm->mode_config.connection_mutex); + + seq_putc(m, '\n'); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(intel_dp_allowed_link_configs); /** * intel_dp_link_caps_debugfs_add - add link caps debugfs files for a connector @@ -1149,6 +1186,9 @@ void intel_dp_link_caps_debugfs_add(struct intel_connector *connector) debugfs_create_file("i915_dp_max_lane_count", 0444, root, connector, &i915_dp_max_lane_count_fops); + + debugfs_create_file("intel_dp_allowed_link_configs", 0444, root, + connector, &intel_dp_allowed_link_configs_fops); } struct intel_dp_link_caps *intel_dp_link_caps_init(struct intel_dp *intel_dp) |