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->panel = of_drm_find_panel(remote_node); 34 if (IS_ERR(out->panel)) 35 out->panel = NULL; 36 37 if (!out->panel) 38 out->bridge = of_drm_find_and_get_bridge(remote_node); 39 40 of_node_put(remote_node); 41 42 if (out->panel) { 43 struct drm_bridge *bridge; 44 45 bridge = drm_panel_bridge_add(out->panel); 46 drm_panel_put(out->panel); 47 if (IS_ERR(bridge)) { 48 dev_err(out->dev, 49 "unable to create panel bridge (%ld)\n", 50 PTR_ERR(bridge)); 51 ret = PTR_ERR(bridge); 52 goto error; 53 } 54 55 out->bridge = drm_bridge_get(bridge); 56 } 57 58 if (local_bridge) { 59 if (!out->bridge) { 60 ret = -EPROBE_DEFER; 61 goto error; 62 } 63 64 out->next_bridge = out->bridge; 65 out->bridge = drm_bridge_get(local_bridge); 66 } 67 68 if (!out->bridge) { 69 ret = -EPROBE_DEFER; 70 goto error; 71 } 72 73 return 0; 74 75 error: 76 omapdss_device_cleanup_output(out); 77 return ret; 78 } 79 80 void omapdss_device_cleanup_output(struct omap_dss_device *out) 81 { 82 if (out->bridge && out->panel) 83 drm_panel_bridge_remove(out->next_bridge ? 84 out->next_bridge : out->bridge); 85 86 drm_bridge_put(out->next_bridge); 87 drm_bridge_put(out->bridge); 88 } 89 90 void dss_mgr_set_timings(struct omap_dss_device *dssdev, 91 const struct videomode *vm) 92 { 93 omap_crtc_dss_set_timings(dssdev->dss->mgr_ops_priv, 94 dssdev->dispc_channel, vm); 95 } 96 97 void dss_mgr_set_lcd_config(struct omap_dss_device *dssdev, 98 const struct dss_lcd_mgr_config *config) 99 { 100 omap_crtc_dss_set_lcd_config(dssdev->dss->mgr_ops_priv, 101 dssdev->dispc_channel, config); 102 } 103 104 int dss_mgr_enable(struct omap_dss_device *dssdev) 105 { 106 return omap_crtc_dss_enable(dssdev->dss->mgr_ops_priv, 107 dssdev->dispc_channel); 108 } 109 110 void dss_mgr_disable(struct omap_dss_device *dssdev) 111 { 112 omap_crtc_dss_disable(dssdev->dss->mgr_ops_priv, 113 dssdev->dispc_channel); 114 } 115 116 void dss_mgr_start_update(struct omap_dss_device *dssdev) 117 { 118 omap_crtc_dss_start_update(dssdev->dss->mgr_ops_priv, 119 dssdev->dispc_channel); 120 } 121 122 int dss_mgr_register_framedone_handler(struct omap_dss_device *dssdev, 123 void (*handler)(void *), void *data) 124 { 125 struct dss_device *dss = dssdev->dss; 126 127 return omap_crtc_dss_register_framedone(dss->mgr_ops_priv, 128 dssdev->dispc_channel, 129 handler, data); 130 } 131 132 void dss_mgr_unregister_framedone_handler(struct omap_dss_device *dssdev, 133 void (*handler)(void *), void *data) 134 { 135 struct dss_device *dss = dssdev->dss; 136 137 omap_crtc_dss_unregister_framedone(dss->mgr_ops_priv, 138 dssdev->dispc_channel, 139 handler, data); 140 } 141