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