@@ -3,6 +3,16 @@ if ARCH_MXC || COMPILE_TEST
config DRM_IMX_LDB_HELPER
tristate
+config DRM_IMX_LEGACY_BRIDGE
+ tristate
+ depends on DRM_IMX
+ help
+ This is a DRM bridge implementation for the DRM i.MX IPUv3 driver,
+ that uses of_get_drm_display_mode to acquire display mode.
+
+ Newer designs should not use this bridge and should use proper panel
+ driver instead.
+
config DRM_IMX8MP_DW_HDMI_BRIDGE
tristate "Freescale i.MX8MP HDMI-TX bridge support"
depends on OF
@@ -1,4 +1,5 @@
obj-$(CONFIG_DRM_IMX_LDB_HELPER) += imx-ldb-helper.o
+obj-$(CONFIG_DRM_IMX_LEGACY_BRIDGE) += imx-legacy-bridge.o
obj-$(CONFIG_DRM_IMX8MP_DW_HDMI_BRIDGE) += imx8mp-hdmi-tx.o
obj-$(CONFIG_DRM_IMX8MP_HDMI_PVI) += imx8mp-hdmi-pvi.o
obj-$(CONFIG_DRM_IMX8QM_LDB) += imx8qm-ldb.o
new file mode 100644
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Freescale i.MX drm driver
+ *
+ * bridge driver for legacy DT bindings, utilizing display-timings node
+ */
+
+#include <drm/drm_bridge.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/bridge/imx.h>
+
+#include <video/of_display_timing.h>
+#include <video/of_videomode.h>
+
+struct imx_legacy_bridge {
+ struct drm_bridge base;
+
+ struct drm_display_mode mode;
+ u32 bus_flags;
+};
+
+#define to_imx_legacy_bridge(bridge) container_of(bridge, struct imx_legacy_bridge, base)
+
+static int imx_legacy_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int imx_legacy_bridge_get_modes(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct imx_legacy_bridge *imx_bridge = to_imx_legacy_bridge(bridge);
+ int ret;
+
+ ret = drm_connector_helper_get_modes_fixed(connector, &imx_bridge->mode);
+ if (ret)
+ return ret;
+
+ connector->display_info.bus_flags = imx_bridge->bus_flags;
+
+ return 0;
+}
+
+struct drm_bridge_funcs imx_legacy_bridge_funcs = {
+ .attach = imx_legacy_bridge_attach,
+ .get_modes = imx_legacy_bridge_get_modes,
+};
+
+struct drm_bridge *devm_imx_drm_legacy_bridge(struct device *dev,
+ struct device_node *np,
+ int type)
+{
+ struct imx_legacy_bridge *imx_bridge;
+ int ret;
+
+ imx_bridge = devm_kzalloc(dev, sizeof(*imx_bridge), GFP_KERNEL);
+ if (!imx_bridge)
+ return ERR_PTR(-ENOMEM);
+
+ ret = of_get_drm_display_mode(np,
+ &imx_bridge->mode,
+ &imx_bridge->bus_flags,
+ OF_USE_NATIVE_MODE);
+ if (ret)
+ return ERR_PTR(ret);
+
+ imx_bridge->mode.type |= DRM_MODE_TYPE_DRIVER;
+
+ imx_bridge->base.funcs = &imx_legacy_bridge_funcs;
+ imx_bridge->base.of_node = np;
+ imx_bridge->base.ops = DRM_BRIDGE_OP_MODES;
+ imx_bridge->base.type = type;
+
+ ret = devm_drm_bridge_add(dev, &imx_bridge->base);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return &imx_bridge->base;
+}
+EXPORT_SYMBOL_GPL(devm_imx_drm_legacy_bridge);
new file mode 100644
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2012 Sascha Hauer, Pengutronix
+ */
+
+#ifndef DRM_IMX_BRIDGE_H
+#define DRM_IMX_BRIDGE_H
+
+struct drm_bridge *devm_imx_drm_legacy_bridge(struct device *dev,
+ struct device_node *np,
+ int type);
+
+#endif
i.MX DRM DT bindings allow using either a proper panel / bridge graph to provide information about connected panels, or just a display-timings DT node, describing just the timings and the flags. Add helper bridge driver supporting the latter usecase. It will be used by both LDB and parallel-display drivers. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> --- drivers/gpu/drm/bridge/imx/Kconfig | 10 +++ drivers/gpu/drm/bridge/imx/Makefile | 1 + drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c | 85 ++++++++++++++++++++++++++ include/drm/bridge/imx.h | 13 ++++ 4 files changed, 109 insertions(+)