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ba2db93cf3
As suggested by Dmitry, the DRM legacy bridge driver can be pulled out of imx/ subdir for multi-platform use. The driver is also renamed to make it more generic and suitable for platforms other than i.MX. Signed-off-by: Damon Ding <damon.ding@rock-chips.com> Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Heiko Stuebner <heiko@sntech.de> # rk3588 Link: https://patch.msgid.link/20260409065301.446670-3-damon.ding@rock-chips.com Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2012 Sascha Hauer, Pengutronix
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*
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* bridge driver for legacy DT bindings, utilizing display-timings node
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*
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* Author: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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*/
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#include <linux/export.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_modes.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/bridge/of-display-mode-bridge.h>
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#include <video/of_display_timing.h>
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#include <video/of_videomode.h>
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struct of_display_mode_bridge {
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struct drm_bridge base;
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struct drm_display_mode mode;
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u32 bus_flags;
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};
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#define to_of_display_mode_bridge(bridge) container_of(bridge, struct of_display_mode_bridge, base)
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static int of_display_mode_bridge_attach(struct drm_bridge *bridge,
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struct drm_encoder *encoder,
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enum drm_bridge_attach_flags flags)
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{
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if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
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return -EINVAL;
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return 0;
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}
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static int of_display_mode_bridge_get_modes(struct drm_bridge *bridge,
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struct drm_connector *connector)
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{
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struct of_display_mode_bridge *of_bridge = to_of_display_mode_bridge(bridge);
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int ret;
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ret = drm_connector_helper_get_modes_fixed(connector, &of_bridge->mode);
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if (ret)
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return ret;
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connector->display_info.bus_flags = of_bridge->bus_flags;
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return 0;
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}
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struct drm_bridge_funcs of_display_mode_bridge_funcs = {
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.attach = of_display_mode_bridge_attach,
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.get_modes = of_display_mode_bridge_get_modes,
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};
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struct drm_bridge *devm_drm_of_display_mode_bridge(struct device *dev,
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struct device_node *np,
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int type)
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{
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struct of_display_mode_bridge *of_bridge;
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int ret;
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of_bridge = devm_drm_bridge_alloc(dev, struct of_display_mode_bridge,
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base, &of_display_mode_bridge_funcs);
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if (IS_ERR(of_bridge))
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return ERR_CAST(of_bridge);
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ret = of_get_drm_display_mode(np,
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&of_bridge->mode,
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&of_bridge->bus_flags,
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OF_USE_NATIVE_MODE);
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if (ret)
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return ERR_PTR(ret);
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of_bridge->mode.type |= DRM_MODE_TYPE_DRIVER;
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of_bridge->base.of_node = np;
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of_bridge->base.ops = DRM_BRIDGE_OP_MODES;
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of_bridge->base.type = type;
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ret = devm_drm_bridge_add(dev, &of_bridge->base);
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if (ret)
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return ERR_PTR(ret);
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return &of_bridge->base;
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}
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EXPORT_SYMBOL_GPL(devm_drm_of_display_mode_bridge);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("DRM bridge driver for legacy DT bindings");
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