1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/ 4 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> 5 */ 6 7 #include <drm/drm_atomic.h> 8 #include <drm/drm_atomic_helper.h> 9 #include <drm/drm_bridge.h> 10 #include <drm/drm_gem_framebuffer_helper.h> 11 #include <drm/drm_of.h> 12 #include <drm/drm_panel.h> 13 #include <drm/drm_vblank.h> 14 15 #include "tidss_crtc.h" 16 #include "tidss_dispc.h" 17 #include "tidss_drv.h" 18 #include "tidss_encoder.h" 19 #include "tidss_kms.h" 20 #include "tidss_plane.h" 21 22 static void tidss_atomic_commit_tail(struct drm_atomic_commit *old_state) 23 { 24 struct drm_device *ddev = old_state->dev; 25 struct tidss_device *tidss = to_tidss(ddev); 26 27 tidss_runtime_get(tidss); 28 29 /* 30 * TI's OLDI and DSI encoders need to be set up before the crtc is 31 * enabled. Thus drm_atomic_helper_commit_modeset_enables() and 32 * drm_atomic_helper_commit_modeset_disables() cannot be used here, as 33 * they enable the crtc before bridges' pre-enable, and disable the crtc 34 * after bridges' post-disable. 35 * 36 * Open code the functions here and first call the bridges' pre-enables, 37 * then crtc enable, then bridges' post-enable (and vice versa for 38 * disable). 39 */ 40 41 drm_atomic_helper_commit_encoder_bridge_disable(ddev, old_state); 42 drm_atomic_helper_commit_crtc_disable(ddev, old_state); 43 drm_atomic_helper_commit_encoder_bridge_post_disable(ddev, old_state); 44 45 drm_atomic_helper_update_legacy_modeset_state(ddev, old_state); 46 drm_atomic_helper_calc_timestamping_constants(old_state); 47 drm_atomic_helper_commit_crtc_set_mode(ddev, old_state); 48 49 drm_atomic_helper_commit_planes(ddev, old_state, 50 DRM_PLANE_COMMIT_ACTIVE_ONLY); 51 52 drm_atomic_helper_commit_encoder_bridge_pre_enable(ddev, old_state); 53 drm_atomic_helper_commit_crtc_enable(ddev, old_state); 54 drm_atomic_helper_commit_encoder_bridge_enable(ddev, old_state); 55 drm_atomic_helper_commit_writebacks(ddev, old_state); 56 57 drm_atomic_helper_commit_hw_done(old_state); 58 drm_atomic_helper_wait_for_flip_done(ddev, old_state); 59 60 drm_atomic_helper_cleanup_planes(ddev, old_state); 61 62 tidss_runtime_put(tidss); 63 } 64 65 static const struct drm_mode_config_helper_funcs mode_config_helper_funcs = { 66 .atomic_commit_tail = tidss_atomic_commit_tail, 67 }; 68 69 static int tidss_atomic_check(struct drm_device *ddev, 70 struct drm_atomic_commit *state) 71 { 72 struct drm_plane_state *opstate; 73 struct drm_plane_state *npstate; 74 struct drm_plane *plane; 75 struct drm_crtc_state *cstate; 76 struct drm_crtc *crtc; 77 int ret, i; 78 79 ret = drm_atomic_helper_check(ddev, state); 80 if (ret) 81 return ret; 82 83 /* 84 * Add all active planes on a CRTC to the atomic state, if 85 * x/y/z position or activity of any plane on that CRTC 86 * changes. This is needed for updating the plane positions in 87 * tidss_crtc_position_planes() which is called from 88 * crtc_atomic_enable() and crtc_atomic_flush(). We have an 89 * extra flag to mark x,y-position changes and together 90 * with zpos_changed the condition recognizes all the above 91 * cases. 92 */ 93 for_each_oldnew_plane_in_state(state, plane, opstate, npstate, i) { 94 if (!npstate->crtc || !npstate->visible) 95 continue; 96 97 if (!opstate->crtc || opstate->crtc_x != npstate->crtc_x || 98 opstate->crtc_y != npstate->crtc_y) { 99 cstate = drm_atomic_get_crtc_state(state, 100 npstate->crtc); 101 if (IS_ERR(cstate)) 102 return PTR_ERR(cstate); 103 to_tidss_crtc_state(cstate)->plane_pos_changed = true; 104 } 105 } 106 107 for_each_new_crtc_in_state(state, crtc, cstate, i) { 108 if (to_tidss_crtc_state(cstate)->plane_pos_changed || 109 cstate->zpos_changed) { 110 ret = drm_atomic_add_affected_planes(state, crtc); 111 if (ret) 112 return ret; 113 } 114 } 115 116 return 0; 117 } 118 119 static const struct drm_mode_config_funcs mode_config_funcs = { 120 .fb_create = drm_gem_fb_create, 121 .atomic_check = tidss_atomic_check, 122 .atomic_commit = drm_atomic_helper_commit, 123 }; 124 125 static int tidss_dispc_modeset_init(struct tidss_device *tidss) 126 { 127 struct device *dev = tidss->dev; 128 unsigned int fourccs_len; 129 const u32 *fourccs = dispc_plane_formats(tidss->dispc, &fourccs_len); 130 unsigned int i; 131 132 struct pipe { 133 u32 hw_videoport; 134 struct drm_bridge *bridge; 135 u32 enc_type; 136 }; 137 138 const struct dispc_features *feat = tidss->feat; 139 u32 max_vps = feat->num_vps; 140 u32 max_planes = feat->num_vids; 141 142 struct pipe pipes[TIDSS_MAX_PORTS]; 143 u32 num_pipes = 0; 144 u32 crtc_mask; 145 146 /* first find all the connected panels & bridges */ 147 148 for (i = 0; i < max_vps; i++) { 149 struct drm_panel *panel; 150 struct drm_bridge *bridge; 151 u32 enc_type = DRM_MODE_ENCODER_NONE; 152 int ret; 153 154 ret = drm_of_find_panel_or_bridge(dev->of_node, i, 0, 155 &panel, &bridge); 156 if (ret == -ENODEV) { 157 dev_dbg(dev, "no panel/bridge for port %d\n", i); 158 continue; 159 } else if (ret) { 160 return dev_err_probe(dev, ret, "port %d probe failed\n", i); 161 } 162 163 if (panel) { 164 u32 conn_type; 165 int ret; 166 167 dev_dbg(dev, "Setting up panel for port %d\n", i); 168 169 switch (feat->vp_bus_type[i]) { 170 case DISPC_VP_OLDI_AM65X: 171 enc_type = DRM_MODE_ENCODER_LVDS; 172 conn_type = DRM_MODE_CONNECTOR_LVDS; 173 break; 174 case DISPC_VP_DPI: 175 enc_type = DRM_MODE_ENCODER_DPI; 176 conn_type = DRM_MODE_CONNECTOR_DPI; 177 break; 178 default: 179 WARN_ON(1); 180 ret = -EINVAL; 181 goto put_panel; 182 } 183 184 if (panel->connector_type != conn_type) { 185 dev_err(dev, 186 "%s: Panel %s has incompatible connector type for vp%d (%d != %d)\n", 187 __func__, dev_name(panel->dev), i, 188 panel->connector_type, conn_type); 189 ret = -EINVAL; 190 goto put_panel; 191 } 192 193 bridge = devm_drm_panel_bridge_add(dev, panel); 194 ret = PTR_ERR_OR_ZERO(bridge); 195 if (ret) 196 dev_err(dev, 197 "failed to set up panel bridge for port %d\n", 198 i); 199 put_panel: 200 drm_panel_put(panel); 201 if (ret) 202 return ret; 203 } 204 205 pipes[num_pipes].hw_videoport = i; 206 pipes[num_pipes].bridge = bridge; 207 pipes[num_pipes].enc_type = enc_type; 208 num_pipes++; 209 } 210 211 /* all planes can be on any crtc */ 212 crtc_mask = (1 << num_pipes) - 1; 213 214 /* then create a plane, a crtc and an encoder for each panel/bridge */ 215 216 for (i = 0; i < num_pipes; ++i) { 217 struct tidss_plane *tplane; 218 struct tidss_crtc *tcrtc; 219 u32 hw_plane_id = feat->vid_order[tidss->num_planes]; 220 int ret; 221 222 tplane = tidss_plane_create(tidss, hw_plane_id, 223 DRM_PLANE_TYPE_PRIMARY, crtc_mask, 224 fourccs, fourccs_len); 225 if (IS_ERR(tplane)) { 226 dev_err(tidss->dev, "plane create failed\n"); 227 return PTR_ERR(tplane); 228 } 229 230 tidss->planes[tidss->num_planes++] = &tplane->plane; 231 232 tcrtc = tidss_crtc_create(tidss, pipes[i].hw_videoport, 233 &tplane->plane); 234 if (IS_ERR(tcrtc)) { 235 dev_err(tidss->dev, "crtc create failed\n"); 236 return PTR_ERR(tcrtc); 237 } 238 239 tidss->crtcs[tidss->num_crtcs++] = &tcrtc->crtc; 240 241 ret = tidss_encoder_create(tidss, pipes[i].bridge, 242 pipes[i].enc_type, 243 1 << tcrtc->crtc.index); 244 if (ret) { 245 dev_err(tidss->dev, "encoder create failed\n"); 246 return ret; 247 } 248 } 249 250 /* create overlay planes of the leftover planes */ 251 252 while (tidss->num_planes < max_planes) { 253 struct tidss_plane *tplane; 254 u32 hw_plane_id = feat->vid_order[tidss->num_planes]; 255 256 tplane = tidss_plane_create(tidss, hw_plane_id, 257 DRM_PLANE_TYPE_OVERLAY, crtc_mask, 258 fourccs, fourccs_len); 259 260 if (IS_ERR(tplane)) { 261 dev_err(tidss->dev, "plane create failed\n"); 262 return PTR_ERR(tplane); 263 } 264 265 tidss->planes[tidss->num_planes++] = &tplane->plane; 266 } 267 268 return 0; 269 } 270 271 int tidss_modeset_init(struct tidss_device *tidss) 272 { 273 struct drm_device *ddev = &tidss->ddev; 274 int ret; 275 276 ret = drmm_mode_config_init(ddev); 277 if (ret) 278 return ret; 279 280 ddev->mode_config.min_width = 8; 281 ddev->mode_config.min_height = 8; 282 ddev->mode_config.max_width = 8096; 283 ddev->mode_config.max_height = 8096; 284 ddev->mode_config.normalize_zpos = true; 285 ddev->mode_config.funcs = &mode_config_funcs; 286 ddev->mode_config.helper_private = &mode_config_helper_funcs; 287 288 ret = tidss_dispc_modeset_init(tidss); 289 if (ret) 290 return ret; 291 292 ret = drm_vblank_init(ddev, tidss->num_crtcs); 293 if (ret) 294 return ret; 295 296 dev_dbg(tidss->dev, "%s done\n", __func__); 297 298 return 0; 299 } 300