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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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174 lines
4.3 KiB
C
174 lines
4.3 KiB
C
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//SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
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* Author:
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* Sandy Huang <hjc@rock-chips.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_dp_helper.h>
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#include <drm/drm_panel.h>
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#include <drm/drm_of.h>
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#include <linux/component.h>
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#include <linux/of_graph.h>
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#include "rockchip_drm_drv.h"
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#include "rockchip_drm_vop.h"
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#define encoder_to_rgb(c) container_of(c, struct rockchip_rgb, encoder)
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struct rockchip_rgb {
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struct device *dev;
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struct drm_device *drm_dev;
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struct drm_bridge *bridge;
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struct drm_encoder encoder;
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int output_mode;
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};
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static int
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rockchip_rgb_encoder_atomic_check(struct drm_encoder *encoder,
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struct drm_crtc_state *crtc_state,
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struct drm_connector_state *conn_state)
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{
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struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
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struct drm_connector *connector = conn_state->connector;
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struct drm_display_info *info = &connector->display_info;
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u32 bus_format;
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if (info->num_bus_formats)
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bus_format = info->bus_formats[0];
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else
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bus_format = MEDIA_BUS_FMT_RGB888_1X24;
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switch (bus_format) {
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case MEDIA_BUS_FMT_RGB666_1X18:
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s->output_mode = ROCKCHIP_OUT_MODE_P666;
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break;
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case MEDIA_BUS_FMT_RGB565_1X16:
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s->output_mode = ROCKCHIP_OUT_MODE_P565;
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break;
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case MEDIA_BUS_FMT_RGB888_1X24:
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case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
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default:
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s->output_mode = ROCKCHIP_OUT_MODE_P888;
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break;
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}
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s->output_type = DRM_MODE_CONNECTOR_LVDS;
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return 0;
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}
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static const
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struct drm_encoder_helper_funcs rockchip_rgb_encoder_helper_funcs = {
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.atomic_check = rockchip_rgb_encoder_atomic_check,
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};
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static const struct drm_encoder_funcs rockchip_rgb_encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
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struct drm_crtc *crtc,
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struct drm_device *drm_dev)
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{
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struct rockchip_rgb *rgb;
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struct drm_encoder *encoder;
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struct device_node *port, *endpoint;
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u32 endpoint_id;
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int ret = 0, child_count = 0;
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struct drm_panel *panel;
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struct drm_bridge *bridge;
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rgb = devm_kzalloc(dev, sizeof(*rgb), GFP_KERNEL);
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if (!rgb)
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return ERR_PTR(-ENOMEM);
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rgb->dev = dev;
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rgb->drm_dev = drm_dev;
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port = of_graph_get_port_by_id(dev->of_node, 0);
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if (!port)
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return ERR_PTR(-EINVAL);
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for_each_child_of_node(port, endpoint) {
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if (of_property_read_u32(endpoint, "reg", &endpoint_id))
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endpoint_id = 0;
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if (rockchip_drm_endpoint_is_subdriver(endpoint) > 0)
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continue;
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child_count++;
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ret = drm_of_find_panel_or_bridge(dev->of_node, 0, endpoint_id,
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&panel, &bridge);
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if (!ret)
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break;
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}
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of_node_put(port);
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/* if the rgb output is not connected to anything, just return */
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if (!child_count)
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return NULL;
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if (ret < 0) {
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if (ret != -EPROBE_DEFER)
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DRM_DEV_ERROR(dev, "failed to find panel or bridge %d\n", ret);
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return ERR_PTR(ret);
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}
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encoder = &rgb->encoder;
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encoder->possible_crtcs = drm_crtc_mask(crtc);
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ret = drm_encoder_init(drm_dev, encoder, &rockchip_rgb_encoder_funcs,
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DRM_MODE_ENCODER_NONE, NULL);
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if (ret < 0) {
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DRM_DEV_ERROR(drm_dev->dev,
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"failed to initialize encoder: %d\n", ret);
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return ERR_PTR(ret);
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}
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drm_encoder_helper_add(encoder, &rockchip_rgb_encoder_helper_funcs);
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if (panel) {
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bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_LVDS);
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if (IS_ERR(bridge))
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return ERR_CAST(bridge);
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}
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rgb->bridge = bridge;
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ret = drm_bridge_attach(encoder, rgb->bridge, NULL);
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if (ret) {
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DRM_DEV_ERROR(drm_dev->dev,
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"failed to attach bridge: %d\n", ret);
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goto err_free_encoder;
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}
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return rgb;
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err_free_encoder:
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drm_encoder_cleanup(encoder);
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return ERR_PTR(ret);
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}
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EXPORT_SYMBOL_GPL(rockchip_rgb_init);
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void rockchip_rgb_fini(struct rockchip_rgb *rgb)
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{
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drm_panel_bridge_remove(rgb->bridge);
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drm_encoder_cleanup(&rgb->encoder);
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}
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EXPORT_SYMBOL_GPL(rockchip_rgb_fini);
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