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drm/i915/tc: Debug print the pin assignment and max lane count

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Debug print the TypeC pin assignment and max lane count value during HW
readout and after resetting the TypeC mode.

Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://lore.kernel.org/r/20250805073700.642107-20-imre.deak@intel.com
Signed-off-by: Imre Deak <imre.deak@intel.com>
This commit is contained in:
Imre Deak 2025-08-05 10:37:00 +03:00
parent 24d1cdacac
commit dcf101872d
1 changed files with 17 additions and 4 deletions
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21
drivers/gpu/drm/i915/display/intel_tc.c
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@ -277,6 +277,14 @@ static u32 get_lane_mask(struct intel_tc_port *tc)
return lane_mask >> DP_LANE_ASSIGNMENT_SHIFT(tc->phy_fia_idx);
}
static char pin_assignment_name(enum intel_tc_pin_assignment pin_assignment)
{
if (pin_assignment == INTEL_TC_PIN_ASSIGNMENT_NONE)
return '-';
return 'A' + pin_assignment - INTEL_TC_PIN_ASSIGNMENT_A;
}
static enum intel_tc_pin_assignment
get_pin_assignment(struct intel_tc_port *tc)
{
@ -1510,10 +1518,13 @@ static void intel_tc_port_reset_mode(struct intel_tc_port *tc,
if (!force_disconnect)
tc_phy_connect(tc, required_lanes);
drm_dbg_kms(display->drm, "Port %s: TC port mode reset (%s -> %s)\n",
drm_dbg_kms(display->drm,
"Port %s: TC port mode reset (%s -> %s) pin assignment: %c max lanes: %d\n",
tc->port_name,
tc_port_mode_name(old_tc_mode),
tc_port_mode_name(tc->mode));
tc_port_mode_name(tc->mode),
pin_assignment_name(tc->pin_assignment),
tc->max_lane_count);
}
static bool intel_tc_port_needs_reset(struct intel_tc_port *tc)
@ -1668,9 +1679,11 @@ void intel_tc_port_sanitize_mode(struct intel_digital_port *dig_port,
__intel_tc_port_put_link(tc);
}
drm_dbg_kms(display->drm, "Port %s: sanitize mode (%s)\n",
drm_dbg_kms(display->drm, "Port %s: sanitize mode (%s) pin assignment: %c max lanes: %d\n",
tc->port_name,
tc_port_mode_name(tc->mode));
tc_port_mode_name(tc->mode),
pin_assignment_name(tc->pin_assignment),
tc->max_lane_count);
mutex_unlock(&tc->lock);
}