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From c3afae0a6418f8b05c5d1a28442ca6c5dd6bc5d7 Mon Sep 17 00:00:00 2001
From: "Lukas F. Hartmann" <lukas@mntre.com>
Date: Wed, 7 Sep 2022 06:20:37 +0200
Subject: [PATCH 1/6] nwl-dsi-fixup-mode-only-for-LCDIF-input-not-DCSS
---
drivers/gpu/drm/bridge/nwl-dsi.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c b/drivers/gpu/drm/bridge/nwl-dsi.c
index 6dc2a4e..13c5ade 100644
--- a/drivers/gpu/drm/bridge/nwl-dsi.c
+++ b/drivers/gpu/drm/bridge/nwl-dsi.c
@@ -822,10 +822,17 @@ static int nwl_dsi_bridge_atomic_check(struct drm_bridge *bridge,
struct drm_connector_state *conn_state)
{
struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
+ struct device_node *remote;
+ struct nwl_dsi *dsi = bridge_to_dsi(bridge);
- /* At least LCDIF + NWL needs active high sync */
- adjusted_mode->flags |= (DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
- adjusted_mode->flags &= ~(DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC);
+ remote = of_graph_get_remote_node(dsi->dev->of_node, 0,
+ NWL_DSI_ENDPOINT_LCDIF);
+
+ if (remote) {
+ /* At least LCDIF + NWL needs active high sync */
+ adjusted_mode->flags |= (DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
+ adjusted_mode->flags &= ~(DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC);
+ }
/*
* Do a full modeset if crtc_state->active is changed to be true.
--
2.39.0
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