Commit 1a1ce789 authored by Jagan Teki's avatar Jagan Teki Committed by Inki Dae
Browse files

drm: exynos: dsi: Restore proper bridge chain order 



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.

Reviewed-by: default avatarMarek Vasut <marex@denx.de>
Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: default avatarJagan Teki <jagan@amarulasolutions.com>
Reviewed-by: default avatarFrieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent 4aa5fc8d

drivers/gpu/drm/exynos/exynos_drm_dsi.c

+7 −2
Original line number Diff line number Diff line
@@ -1445,7 +1445,8 @@ 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 = {
@@ -1491,7 +1492,10 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host, 


	drm_bridge_add(&dsi->bridge);



	drm_bridge_attach(encoder, &dsi->bridge, NULL, 0);

	drm_bridge_attach(encoder, &dsi->bridge,

			  list_first_entry_or_null(&encoder->bridge_chain,

						   struct drm_bridge,

						   chain_node), 0);



	/*

	 * This is a temporary solution and should be made by more generic way.
@@ -1726,6 +1730,7 @@ static int exynos_dsi_probe(struct platform_device *pdev) 
	dsi->bridge.funcs = &exynos_dsi_bridge_funcs;

	dsi->bridge.of_node = dev->of_node;

	dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;

	dsi->bridge.pre_enable_prev_first = true;



	ret = component_add(dev, &exynos_dsi_component_ops);

	if (ret)