From: Marek Szyprowski <m.szyprow...@samsung.com>

Restore the proper bridge chain by finding the previous bridge
in the chain instead of passing NULL.

This establishes a proper bridge chain while attaching downstream
bridges.

v5:
* exclude the NULL replacement in exynos_dsi_host_attach

v4:
* none

v3:
* new patch

Signed-off-by: Marek Szyprowski <m.szyprow...@samsung.com>
Signed-off-by: Jagan Teki <ja...@amarulasolutions.com>
---
 drivers/gpu/drm/exynos/exynos_drm_dsi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c 
b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index ec673223d6b7..f4e3d2518ad0 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -1428,7 +1428,8 @@ static int exynos_dsi_attach(struct drm_bridge *bridge,
 {
        struct exynos_dsi *dsi = bridge_to_dsi(bridge);
 
-       return drm_bridge_attach(bridge->encoder, dsi->out_bridge, NULL, flags);
+       return drm_bridge_attach(bridge->encoder, dsi->out_bridge, bridge,
+                                flags);
 }
 
 static const struct drm_bridge_funcs exynos_dsi_bridge_funcs = {
-- 
2.25.1

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