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// 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);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Freescale i.MX DRM bridge driver for legacy DT bindings");
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