The fixup of HSYNC and VSYNC should not be done when the input source is
DCSS, or internal display does not work on MNT Reform 2 (open hardware
laptop based on NXP i.MX8M using DCSS->DSI->eDP for internal display).
Signed-off-by: Lukas F. Hartmann <lukas@xxxxxxxxx>
---
drivers/gpu/drm/bridge/nwl-dsi.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c b/drivers/gpu/drm/bridge/nwl-dsi.c
index 66b67402f..6735ab2a2 100644
--- a/drivers/gpu/drm/bridge/nwl-dsi.c
+++ b/drivers/gpu/drm/bridge/nwl-dsi.c
@@ -807,10 +807,16 @@ static bool nwl_dsi_bridge_mode_fixup(struct drm_bridge *bridge,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
- /* 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);
+ struct device_node *remote;
+ struct nwl_dsi *dsi = bridge_to_dsi(bridge);
+
+ 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);
+ }
return true;
}
--
2.28.0
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