From 0e96a9b9470647fd5165ec0f971cd30f6d0fd9dc Mon Sep 17 00:00:00 2001 From: Khaled Almahallawy Date: Wed, 9 Apr 2025 16:02:14 -0700 Subject: [PATCH] drm/i915/display: Add link rate and lane count to i915_display_info Adding link rate and lane count information to i915_display_info makes it easier and faster to access this data compared to checking kernel logs. This is particularly beneficial for individuals who are not familiar with i915 in the following scenarios: * Debugging DP tunnel bandwidth usage in the Thunderbolt driver. * During USB4 certification, it is necessary to know the link rate used by the monitor to prove that the DP tunnel can handle required rates. * In PHY CTS, when the connector probes are not mounted correctly, some display lanes may not appear in the DP Oscilloscope, leading to CTS failures. This change provides validation teams with an easy way to identify and troubleshoot issues. v2: separate seq_printf line (Jani) v3: separate output line (Jani) Cc: Imre Deak Cc: Jani Nikula Signed-off-by: Khaled Almahallawy Reviewed-by: Jani Nikula Link: https://lore.kernel.org/r/20250409230214.963999-1-khaled.almahallawy@intel.com Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/display/intel_display_debugfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c index 4c208fdb9137..3f7c605d47d3 100644 --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c @@ -558,6 +558,8 @@ static void intel_crtc_info(struct seq_file *m, struct intel_crtc *crtc) seq_printf(m, "\tpipe src=" DRM_RECT_FMT ", dither=%s, bpp=%d\n", DRM_RECT_ARG(&crtc_state->pipe_src), str_yes_no(crtc_state->dither), crtc_state->pipe_bpp); + seq_printf(m, "\tport_clock=%d, lane_count=%d\n", + crtc_state->port_clock, crtc_state->lane_count); intel_scaler_info(m, crtc); -- 2.25.1