From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> I have at least one SDVO device (some Lenovo DVI-I ADD2 card, based on Conexant CX25904) where GetAttachedDisplays returns success but fails to report any attached displays unless wet precede the command with a SetTargetOutput. Make it so. I wasn't able to spot anything in the SDVO spec stating that this should be necessary, but real world wins over spec. Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_sdvo.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c b/drivers/gpu/drm/i915/display/intel_sdvo.c index 8298a86d1334..9ac4c0b6055b 100644 --- a/drivers/gpu/drm/i915/display/intel_sdvo.c +++ b/drivers/gpu/drm/i915/display/intel_sdvo.c @@ -2135,6 +2135,10 @@ intel_sdvo_detect(struct drm_connector *connector, bool force) if (!INTEL_DISPLAY_ENABLED(i915)) return connector_status_disconnected; + if (!intel_sdvo_set_target_output(intel_sdvo, + intel_sdvo_connector->output_flag)) + return connector_status_unknown; + if (!intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_ATTACHED_DISPLAYS, &response, 2)) -- 2.39.3
