drm/edid: set ELD connector type in drm_edid_to_eld()

Since drm_edid_to_eld() knows the connector type, we can set the type in
ELD while at it. Most connectors this gets called on are not DP
encoders, and with the HDMI type being 0, this does not change behaviour
for non-DP.

For i915 having this in place earlier would have saved a considerable
amount of debugging that lead to the fix 2d8f63297b9f ("drm/i915: always
update ELD connector type after get modes"). I don't see other drivers,
even the ones calling drm_edid_to_eld() on DP connectors, setting the
connector type in ELD.

Cc: Alex Deucher <[email protected]>
Cc: Christian König <[email protected]>
Cc: Archit Taneja <[email protected]>
Cc: Andrzej Hajda <[email protected]>
Cc: Russell King <[email protected]>
Cc: CK Hu <[email protected]>
Cc: Philipp Zabel <[email protected]>
Cc: Ben Skeggs <[email protected]>
Cc: Mark Yao <[email protected]>
Cc: Benjamin Gaignard <[email protected]>
Cc: Vincent Abriou <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: Eric Anholt <[email protected]>
Reviewed-by: Ville Syrjälä <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>
Acked-by: Thierry Reding <[email protected]>
Signed-off-by: Jani Nikula <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/d527b31619528c477c2c136f25cdf118bc0cfc1d.1509545641.git.jani.nikula@intel.com

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 6229735ecc15f6bd5188b795c555505495dbe92e..3139c2e90e32a04a860efa978b4e9e57ff5134ad 100644 (file)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3835,8 +3835,7 @@ EXPORT_SYMBOL(drm_edid_get_monitor_name);
  * @edid: EDID to parse
  *
  * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver. The
- * Conn_Type, HDCP and Port_ID ELD fields are left for the graphics driver to
- * fill in.
+ * HDCP and Port_ID ELD fields are left for the graphics driver to fill in.
  */
 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
 {
@@ -3918,6 +3917,12 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
        }
        eld[DRM_ELD_SAD_COUNT_CONN_TYPE] |= total_sad_count << DRM_ELD_SAD_COUNT_SHIFT;
 
+       if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
+           connector->connector_type == DRM_MODE_CONNECTOR_eDP)
+               eld[DRM_ELD_SAD_COUNT_CONN_TYPE] |= DRM_ELD_CONN_TYPE_DP;
+       else
+               eld[DRM_ELD_SAD_COUNT_CONN_TYPE] |= DRM_ELD_CONN_TYPE_HDMI;
+
        eld[DRM_ELD_BASELINE_ELD_LEN] =
                DIV_ROUND_UP(drm_eld_calc_baseline_block_size(eld), 4);