diff options
| author | Imre Deak <imre.deak@intel.com> | 2024-01-04 10:30:07 +0200 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2024-01-08 18:57:21 +0200 |
| commit | 2e4b90fbe75536c978218bb3eb1d04f8988e13cd (patch) | |
| tree | 69cc82d683abf6292dc96c8fbd8daca17cc72e78 /drivers/gpu/drm/i915/display/intel_tc.h | |
| parent | 9210e94a5a3bf7fc84b3d94dd5d2099ca434931b (diff) | |
drm/i915: Filter out glitches on HPD lines during hotplug detection
Glitches deasserting the connector HPD line can lead to incorrectly
detecting a disconnect event (a glitch asserting the line will only
cause a redundant connect->disconnect transition). The source of such a
glitch can be noise on the line or a 0.5ms-1ms MST IRQ_HPD pulse. TypeC
ports in the DP-alt or TBT-alt mode filter out these glitches inernally,
but for others the driver has to do this. Make it so by polling the HPD
line on these connectors for 4 ms.
Link: https://patchwork.freedesktop.org/patch/msgid/20240104083008.2715733-12-imre.deak@intel.com
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_tc.h')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_tc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_tc.h b/drivers/gpu/drm/i915/display/intel_tc.h index 936fa2daaa74..26c4265368c1 100644 --- a/drivers/gpu/drm/i915/display/intel_tc.h +++ b/drivers/gpu/drm/i915/display/intel_tc.h @@ -15,6 +15,7 @@ struct intel_encoder; bool intel_tc_port_in_tbt_alt_mode(struct intel_digital_port *dig_port); bool intel_tc_port_in_dp_alt_mode(struct intel_digital_port *dig_port); bool intel_tc_port_in_legacy_mode(struct intel_digital_port *dig_port); +bool intel_tc_port_handles_hpd_glitches(struct intel_digital_port *dig_port); bool intel_tc_port_connected(struct intel_encoder *encoder); |