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drm: exynos: dsi: Restore proper bridge chain order

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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: Marek Vasut <marex@denx.de>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Jagan Teki 2022-12-12 23:59:23 +05:30 committed by Inki Dae
parent 4aa5fc8dbb
commit 1a1ce789e6
1 changed files with 7 additions and 2 deletions
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9
drivers/gpu/drm/exynos/exynos_drm_dsi.c
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@ -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)