[PATCH v3 13/19] drm/bridge: fsl-ldb: don't create a panel_bridge
From: Luca Ceresoli <luca.ceresoli@bootlin.com>
Date: 2026-09-16 13:47:37
Also in:
asahi, dri-devel, imx, linux-arm-msm, linux-doc, linux-mips, linux-rockchip, linux-samsung-soc, linux-tegra, lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, drm drivers for bridge chips, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Andrzej Hajda, Neil Armstrong, Robert Foss, Linus Torvalds
Now a panel_bridge is automatically created for every drm_panel and the panel-bridge API is just a deprecated wrapper to access it. Update and simplify the code by just getting a reference to the already-existing bridge using of_drm_find_and_get_bridge(). And since of_drm_find_and_get_bridge() returns a refcounted bridge, take care of putting the bridge reference by using bridge->next_bridge. Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> --- drivers/gpu/drm/bridge/Kconfig | 1 - drivers/gpu/drm/bridge/fsl-ldb.c | 19 +++++-------------- 2 files changed, 5 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 4766ae85da17..0ab3cab92363 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig@@ -87,7 +87,6 @@ config DRM_FSL_LDB depends on OF depends on ARCH_MXC || COMPILE_TEST select DRM_KMS_HELPER - select DRM_PANEL_BRIDGE help Support for i.MX8MP DPI-to-LVDS on-SoC encoder.
diff --git a/drivers/gpu/drm/bridge/fsl-ldb.c b/drivers/gpu/drm/bridge/fsl-ldb.c
index 26cc72948f31..7ec84c81cd78 100644
--- a/drivers/gpu/drm/bridge/fsl-ldb.c
+++ b/drivers/gpu/drm/bridge/fsl-ldb.c@@ -15,7 +15,6 @@ #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_of.h> -#include <drm/drm_panel.h> #define LDB_CTRL_CH0_ENABLE BIT(0) #define LDB_CTRL_CH0_DI_SELECT BIT(1)
@@ -86,7 +85,6 @@ static const struct fsl_ldb_devdata fsl_ldb_devdata[] = { struct fsl_ldb { struct device *dev; struct drm_bridge bridge; - struct drm_bridge *panel_bridge; struct clk *clk; struct regmap *regmap; const struct fsl_ldb_devdata *devdata;
@@ -119,7 +117,7 @@ static int fsl_ldb_attach(struct drm_bridge *bridge, { struct fsl_ldb *fsl_ldb = to_fsl_ldb(bridge); - return drm_bridge_attach(encoder, fsl_ldb->panel_bridge, + return drm_bridge_attach(encoder, fsl_ldb->bridge.next_bridge, bridge, flags); }
@@ -298,7 +296,6 @@ static int fsl_ldb_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *panel_node; struct device_node *remote1, *remote2; - struct drm_panel *panel; struct fsl_ldb *fsl_ldb; int dual_link;
@@ -339,19 +336,13 @@ static int fsl_ldb_probe(struct platform_device *pdev) fsl_ldb_is_dual(fsl_ldb) ? "dual-link mode" : fsl_ldb->ch0_enabled ? "channel 0" : "channel 1"); - panel = of_drm_find_panel(panel_node); - of_node_put(panel_node); - if (IS_ERR(panel)) - return PTR_ERR(panel); - if (of_property_present(dev->of_node, "nxp,enable-termination-resistor")) fsl_ldb->use_termination_resistor = true; - fsl_ldb->panel_bridge = devm_drm_panel_bridge_add(dev, panel); - drm_panel_put(panel); - if (IS_ERR(fsl_ldb->panel_bridge)) - return PTR_ERR(fsl_ldb->panel_bridge); - + fsl_ldb->bridge.next_bridge = of_drm_find_and_get_bridge(panel_node); + of_node_put(panel_node); + if (!fsl_ldb->bridge.next_bridge) + return -ENODEV; if (fsl_ldb_is_dual(fsl_ldb)) { struct device_node *port1, *port2;
--
2.55.0