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145 lines
3.7 KiB
C
145 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020 Loongson Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*/
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/*
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* Authors:
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* Sui Jingfeng <suijingfeng@loongson.cn>
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*/
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#include <drm/drm_print.h>
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#include <drm/drm_of.h>
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#include <drm/drm_bridge.h>
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#include "lsdc_drv.h"
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static const struct drm_encoder_funcs lsdc_bridge_encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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static int lsdc_attach_bridge_impl(struct lsdc_device *ldev,
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struct device_node *ports,
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struct drm_encoder *encoder,
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unsigned int i)
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{
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struct drm_bridge *bridge;
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struct drm_panel *panel;
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int ret;
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ret = drm_of_find_panel_or_bridge(ports, i, 0, &panel, &bridge);
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if (panel) {
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bridge = drm_panel_bridge_add(panel);
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if (IS_ERR(bridge))
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return PTR_ERR(bridge);
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DRM_INFO("Output-%u is a DPI panel\n", i);
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}
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encoder->possible_crtcs = BIT(i);
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encoder->possible_clones = BIT(1) | BIT(0);
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ret = drm_encoder_init(&ldev->ddev,
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encoder,
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&lsdc_bridge_encoder_funcs,
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DRM_MODE_ENCODER_DPI,
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NULL);
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if (ret)
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return ret;
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ret = drm_bridge_attach(encoder, bridge, NULL, 0);
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if (ret) {
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DRM_ERROR("Attach bridge %pOF to output-%u failed: %d\n",
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bridge->of_node, i, ret);
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return ret;
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}
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DRM_INFO("Bridge %pOF attached to %s\n",
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bridge->of_node, encoder->name);
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return 0;
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}
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int lsdc_attach_bridges(struct lsdc_device *ldev, unsigned int num_crtc)
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{
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struct drm_device *ddev = &ldev->ddev;
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struct device_node *ports;
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struct lsdc_display_pipe *dispipe;
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unsigned int i;
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int ret;
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ldev->num_output = 0;
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ports = of_get_child_by_name(ddev->dev->of_node, "ports");
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/* First, find all available display bridges and mark it */
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for (i = 0; i < num_crtc; i++) {
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struct drm_bridge *b;
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struct drm_panel *p;
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dispipe = &ldev->dispipe[i];
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ret = drm_of_find_panel_or_bridge(ports, i, 0, &p, &b);
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if (ret) {
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if (ret == -ENODEV) {
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DRM_INFO("No panel or bridge on port%u\n", i);
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dispipe->available = false;
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continue;
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}
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if (ret == -EPROBE_DEFER)
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DRM_INFO("port%d is defer probed\n", i);
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goto ERR_RET;
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}
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dispipe->available = true;
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ldev->num_output++;
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}
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if (ldev->num_output == 0) {
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DRM_ERROR("No validate output available, abort\n");
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ret = -ENODEV;
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goto ERR_RET;
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}
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/* Then, attach it */
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for (i = 0; i < num_crtc; i++) {
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dispipe = &ldev->dispipe[i];
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if (dispipe->available) {
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ret = lsdc_attach_bridge_impl(ldev,
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ports,
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&dispipe->encoder,
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i);
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if (ret)
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goto ERR_RET;
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}
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}
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DRM_INFO("number of outputs: %u\n", ldev->num_output);
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ERR_RET:
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of_node_put(ports);
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return ret;
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}
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