1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/ 4 * Author: Archit Taneja <archit@ti.com> 5 */ 6 7 #include <linux/kernel.h> 8 #include <linux/module.h> 9 #include <linux/platform_device.h> 10 #include <linux/slab.h> 11 #include <linux/of.h> 12 #include <linux/of_graph.h> 13 14 #include <drm/drm_bridge.h> 15 #include <drm/drm_panel.h> 16 17 #include "dss.h" 18 #include "omapdss.h" 19 20 int omapdss_device_init_output(struct omap_dss_device *out, 21 struct drm_bridge *local_bridge) 22 { 23 struct device_node *remote_node; 24 int ret; 25 26 remote_node = of_graph_get_remote_node(out->dev->of_node, 27 out->of_port, 0); 28 if (!remote_node) { 29 dev_dbg(out->dev, "failed to find video sink\n"); 30 return 0; 31 } 32 33 out->bridge = of_drm_find_bridge(remote_node); 34 out->panel = of_drm_find_panel(remote_node); 35 if (IS_ERR(out->panel)) 36 out->panel = NULL; 37 38 of_node_put(remote_node); 39 40 if (out->panel) { 41 struct drm_bridge *bridge; 42 43 bridge = drm_panel_bridge_add(out->panel); 44 if (IS_ERR(bridge)) { 45 dev_err(out->dev, 46 "unable to create panel bridge (%ld)\n", 47 PTR_ERR(bridge)); 48 ret = PTR_ERR(bridge); 49 goto error; 50 } 51 52 out->bridge = bridge; 53 } 54 55 if (local_bridge) { 56 if (!out->bridge) { 57 ret = -EPROBE_DEFER; 58 goto error; 59 } 60 61 out->next_bridge = out->bridge; 62 out->bridge = local_bridge; 63 } 64 65 if (!out->bridge) { 66 ret = -EPROBE_DEFER; 67 goto error; 68 } 69 70 return 0; 71 72 error: 73 omapdss_device_cleanup_output(out); 74 return ret; 75 } 76 77 void omapdss_device_cleanup_output(struct omap_dss_device *out) 78 { 79 if (out->bridge && out->panel) 80 drm_panel_bridge_remove(out->next_bridge ? 81 out->next_bridge : out->bridge); 82 } 83 84 void dss_mgr_set_timings(struct omap_dss_device *dssdev, 85 const struct videomode *vm) 86 { 87 omap_crtc_dss_set_timings(dssdev->dss->mgr_ops_priv, 88 dssdev->dispc_channel, vm); 89 } 90 91 void dss_mgr_set_lcd_config(struct omap_dss_device *dssdev, 92 const struct dss_lcd_mgr_config *config) 93 { 94 omap_crtc_dss_set_lcd_config(dssdev->dss->mgr_ops_priv, 95 dssdev->dispc_channel, config); 96 } 97 98 int dss_mgr_enable(struct omap_dss_device *dssdev) 99 { 100 return omap_crtc_dss_enable(dssdev->dss->mgr_ops_priv, 101 dssdev->dispc_channel); 102 } 103 104 void dss_mgr_disable(struct omap_dss_device *dssdev) 105 { 106 omap_crtc_dss_disable(dssdev->dss->mgr_ops_priv, 107 dssdev->dispc_channel); 108 } 109 110 void dss_mgr_start_update(struct omap_dss_device *dssdev) 111 { 112 omap_crtc_dss_start_update(dssdev->dss->mgr_ops_priv, 113 dssdev->dispc_channel); 114 } 115 116 int dss_mgr_register_framedone_handler(struct omap_dss_device *dssdev, 117 void (*handler)(void *), void *data) 118 { 119 struct dss_device *dss = dssdev->dss; 120 121 return omap_crtc_dss_register_framedone(dss->mgr_ops_priv, 122 dssdev->dispc_channel, 123 handler, data); 124 } 125 126 void dss_mgr_unregister_framedone_handler(struct omap_dss_device *dssdev, 127 void (*handler)(void *), void *data) 128 { 129 struct dss_device *dss = dssdev->dss; 130 131 omap_crtc_dss_unregister_framedone(dss->mgr_ops_priv, 132 dssdev->dispc_channel, 133 handler, data); 134 } 135