diff options
| author | Ville Syrjälä | 2023-07-05 23:21:10 +0300 |
|---|---|---|
| committer | Ville Syrjälä | 2023-08-24 15:20:03 +0300 |
| commit | 1d6f7b19bdff4c62fcbbd0d73868e1292b0ea4d4 (patch) | |
| tree | a76e66dad25a38a599216ebecadf4c233e07188f /drivers | |
| parent | 40a54a268ffc0fa1d28150054d1fffbe0ea37fd8 (diff) | |
drm/i915/sdvo: Issue SetTargetOutput prior to GetAttachedDisplays
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 we
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@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230705202122.17915-2-ville.syrjala@linux.intel.com
Acked-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_sdvo.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c b/drivers/gpu/drm/i915/display/intel_sdvo.c index 7d25a64698e2..7108d031271a 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)) |