[RFC PATCH 10/17] drm: bridge: samsung-dsim: Update the of_node for port(s)
From: Jagan Teki <jagan@amarulasolutions.com>
Date: 2021-07-04 09:05:14
Also in:
dri-devel, linux-arm-kernel, linux-samsung-soc
Subsystem:
drm driver for samsung mipi dsim bridge, drm drivers, drm drivers and misc gpu patches, drm drivers for bridge chips, the rest · Maintainers:
Inki Dae, Jagan Teki, Marek Szyprowski, David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Andrzej Hajda, Neil Armstrong, Robert Foss, Linus Torvalds
Existing bridge driver is able to find the panel or bridge if of_node isn't a port(s). This is how the exynos dsi node handling has been done so far. However in order to make use of this bridge in other or new supported platforms like i.MX8MM it is required to have a port based of_node. So, this patch will check if node is a port based and then update of_node. This way we can support the platforms which are using legacy or new DSI bindings. Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> --- drivers/gpu/drm/bridge/samsung-dsim.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index 627580abd6df..2222c27feffd 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c@@ -226,6 +226,11 @@ enum samsung_dsim_transfer_type { EXYNOS_DSI_RX, }; +enum { + DSI_PORT_IN, + DSI_PORT_OUT +}; + struct samsung_dsim_transfer { struct list_head list; struct completion completed;
@@ -1436,6 +1441,15 @@ static int samsung_dsim_panel_or_bridge(struct samsung_dsim *dsi, { struct drm_bridge *panel_bridge; struct drm_panel *panel; + struct device_node *remote; + + if (of_graph_is_present(node)) { + remote = of_graph_get_remote_node(node, DSI_PORT_OUT, 0); + if (!remote) + return -ENODEV; + + node = remote; + } panel_bridge = of_drm_find_bridge(node); if (!panel_bridge) {
@@ -1579,11 +1593,6 @@ static int samsung_dsim_of_read_u32(const struct device_node *np, return ret; } -enum { - DSI_PORT_IN, - DSI_PORT_OUT -}; - static int samsung_dsim_parse_dt(struct samsung_dsim *dsi) { struct device *dev = dsi->dev;
--
2.25.1