At least the i-tec USB-C Nano 2x Display Docking Station (containing a Synaptics MST branch device) requires the driver to update the source OUI DPCD registers to expose its DSC capability. Accordingly update the OUI for all sink types (besides eDP where this has been done already). v2: Rebased on latest patch version. Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11776 Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_dp.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 916301aa9f6b6..24daf5f973770 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -3407,9 +3407,6 @@ intel_dp_init_source_oui(struct intel_dp *intel_dp) u8 oui[] = { 0x00, 0xaa, 0x01 }; u8 buf[3] = {}; - if (!intel_dp_is_edp(intel_dp)) - return; - if (READ_ONCE(intel_dp->oui_valid)) return; @@ -6133,6 +6130,8 @@ intel_dp_hpd_pulse(struct intel_digital_port *dig_port, bool long_hpd) if (long_hpd) { intel_dp->reset_link_params = true; + intel_dp_invalidate_source_oui(intel_dp); + return IRQ_NONE; } -- 2.44.2
