[PATCH v5 9/9] drm/msm/dp: Support edp/dp without hpd

[Sankeerth Billakanti]

Some eDP sinks or platform boards will not support hpd.
This patch adds support for those cases.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka at quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_catalog.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index f15316b..f8ddc73 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -596,8 +596,10 @@ void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog)
 	reftimer |= DP_DP_HPD_REFTIMER_ENABLE;
 	dp_write_aux(catalog, REG_DP_DP_HPD_REFTIMER, reftimer);
 
-	/* Enable HPD */
-	dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, DP_DP_HPD_CTRL_HPD_EN);
+	/* Enable HPD if supported*/
+	if (!of_property_read_bool(catalog->dev->of_node, "no-hpd"))
+		dp_write_aux(catalog, REG_DP_DP_HPD_CTRL,
+				DP_DP_HPD_CTRL_HPD_EN);
 }
 
 u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog)
-- 
2.7.4