On Fri, Oct 30, 2015 at 09:09:15AM +0800, Yakir Yang wrote:

Some edp screen do not have hpd signal, so we can't just return
failed when hpd plug in detect failed.

This is an hardware property, so we need add a devicetree property
"analogix,need-force-hpd" to indicate this sutiation.

Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>
---

I didn't find this one in v10. Did it get dropped?

Changes in v9: None
Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3:
- Add "analogix,need-force-hpd" to indicate whether driver need foce
  hpd when hpd detect failed.

Changes in v2: None

 .../bindings/display/bridge/analogix_dp.txt        |  4 ++-
 .../bindings/display/exynos/exynos_dp.txt          |  1 +
 .../display/rockchip/analogix_dp-rockchip.txt      |  1 +
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 36 +++++++++++++++++++---
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.h |  2 ++
 drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c  |  9 ++++++
 6 files changed, 47 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
index 7659a7a..74f0e80 100644
--- a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
+++ b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
@@ -22,6 +22,9 @@ Required properties for dp-controller:
 		from general PHY binding: Should be "dp".
 
 Optional properties for dp-controller:
+	-analogix,need-force-hpd:
+		Indicate driver need force hpd when hpd detect failed, this
+		is used for some eDP screen which don't have hpd signal.

This should be a generic property.

Rob