Unverified Commit d688f6b5 authored by Marek Vasut's avatar Marek Vasut Committed by Robert Foss
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drm/bridge: tc358767: Handle bridge past DPI output 



Currently the driver only handles panel directly connected to the DPI output.
Handle the case where a bridge is connected past DPI output of this bridge.
This could be e.g. DPI to LVDS encoder chip.

Signed-off-by: default avatarMarek Vasut <marex@denx.de>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: default avatarRobert Foss <robert.foss@linaro.org>
Signed-off-by: default avatarRobert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220724224317.288727-1-marex@denx.de
parent f8e1fa0f

drivers/gpu/drm/bridge/tc358767.c

+8 −7
Original line number Diff line number Diff line
@@ -1913,22 +1913,23 @@ static int tc_mipi_dsi_host_attach(struct tc_data *tc) 
static int tc_probe_dpi_bridge_endpoint(struct tc_data *tc)

{

	struct device *dev = tc->dev;

	struct drm_bridge *bridge;

	struct drm_panel *panel;

	int ret;



	/* port@1 is the DPI input/output port */

	ret = drm_of_find_panel_or_bridge(dev->of_node, 1, 0, &panel, NULL);

	ret = drm_of_find_panel_or_bridge(dev->of_node, 1, 0, &panel, &bridge);

	if (ret && ret != -ENODEV)

		return ret;



	if (panel) {

		struct drm_bridge *panel_bridge;



		panel_bridge = devm_drm_panel_bridge_add(dev, panel);

		if (IS_ERR(panel_bridge))

			return PTR_ERR(panel_bridge);

		bridge = devm_drm_panel_bridge_add(dev, panel);

		if (IS_ERR(bridge))

			return PTR_ERR(bridge);

	}



		tc->panel_bridge = panel_bridge;

	if (bridge) {

		tc->panel_bridge = bridge;

		tc->bridge.type = DRM_MODE_CONNECTOR_DPI;

		tc->bridge.funcs = &tc_dpi_bridge_funcs;