[PATCH 2/7] drm/edid: set ELD connector type in drm_edid_to_eld()

[Jani Nikula]

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 <alexander.deucher at amd.com>
Cc: Christian König <christian.koenig at amd.com>
Cc: Archit Taneja <architt at codeaurora.org>
Cc: Andrzej Hajda <a.hajda at samsung.com>
Cc: Russell King <linux at armlinux.org.uk>
Cc: CK Hu <ck.hu at mediatek.com>
Cc: Philipp Zabel <p.zabel at pengutronix.de>
Cc: Ben Skeggs <bskeggs at redhat.com>
Cc: Mark Yao <mark.yao at rock-chips.com>
Cc: Benjamin Gaignard <benjamin.gaignard at linaro.org>
Cc: Vincent Abriou <vincent.abriou at st.com>
Cc: Thierry Reding <thierry.reding at gmail.com>
Cc: Eric Anholt <eric at anholt.net>
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/drm_edid.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 6229735ecc15..3139c2e90e32 100644
--- 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);
 
-- 
2.11.0