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 <linux/dma-fence.h> 8 9 #include <drm/drm_atomic.h> 10 #include <drm/drm_atomic_helper.h> 11 #include <drm/drm_bridge.h> 12 #include <drm/drm_crtc_helper.h> 13 #include <drm/drm_fb_cma_helper.h> 14 #include <drm/drm_fb_helper.h> 15 #include <drm/drm_gem_framebuffer_helper.h> 16 #include <drm/drm_of.h> 17 #include <drm/drm_panel.h> 18 #include <drm/drm_vblank.h> 19 20 #include "tidss_crtc.h" 21 #include "tidss_dispc.h" 22 #include "tidss_drv.h" 23 #include "tidss_encoder.h" 24 #include "tidss_kms.h" 25 #include "tidss_plane.h" 26 27 static void tidss_atomic_commit_tail(struct drm_atomic_state *old_state) 28 { 29 struct drm_device *ddev = old_state->dev; 30 struct tidss_device *tidss = to_tidss(ddev); 31 bool fence_cookie = dma_fence_begin_signalling(); 32 33 dev_dbg(ddev->dev, "%s\n", __func__); 34 35 tidss_runtime_get(tidss); 36 37 drm_atomic_helper_commit_modeset_disables(ddev, old_state); 38 drm_atomic_helper_commit_planes(ddev, old_state, 0); 39 drm_atomic_helper_commit_modeset_enables(ddev, old_state); 40 41 drm_atomic_helper_commit_hw_done(old_state); 42 dma_fence_end_signalling(fence_cookie); 43 drm_atomic_helper_wait_for_flip_done(ddev, old_state); 44 45 drm_atomic_helper_cleanup_planes(ddev, old_state); 46 47 tidss_runtime_put(tidss); 48 } 49 50 static const struct drm_mode_config_helper_funcs mode_config_helper_funcs = { 51 .atomic_commit_tail = tidss_atomic_commit_tail, 52 }; 53 54 static int tidss_atomic_check(struct drm_device *ddev, 55 struct drm_atomic_state *state) 56 { 57 struct drm_plane_state *opstate; 58 struct drm_plane_state *npstate; 59 struct drm_plane *plane; 60 struct drm_crtc_state *cstate; 61 struct drm_crtc *crtc; 62 int ret, i; 63 64 ret = drm_atomic_helper_check(ddev, state); 65 if (ret) 66 return ret; 67 68 /* 69 * Add all active planes on a CRTC to the atomic state, if 70 * x/y/z position or activity of any plane on that CRTC 71 * changes. This is needed for updating the plane positions in 72 * tidss_crtc_position_planes() which is called from 73 * crtc_atomic_enable() and crtc_atomic_flush(). We have an 74 * extra flag to to mark x,y-position changes and together 75 * with zpos_changed the condition recognizes all the above 76 * cases. 77 */ 78 for_each_oldnew_plane_in_state(state, plane, opstate, npstate, i) { 79 if (!npstate->crtc || !npstate->visible) 80 continue; 81 82 if (!opstate->crtc || opstate->crtc_x != npstate->crtc_x || 83 opstate->crtc_y != npstate->crtc_y) { 84 cstate = drm_atomic_get_crtc_state(state, 85 npstate->crtc); 86 if (IS_ERR(cstate)) 87 return PTR_ERR(cstate); 88 to_tidss_crtc_state(cstate)->plane_pos_changed = true; 89 } 90 } 91 92 for_each_new_crtc_in_state(state, crtc, cstate, i) { 93 if (to_tidss_crtc_state(cstate)->plane_pos_changed || 94 cstate->zpos_changed) { 95 ret = drm_atomic_add_affected_planes(state, crtc); 96 if (ret) 97 return ret; 98 } 99 } 100 101 return 0; 102 } 103 104 static const struct drm_mode_config_funcs mode_config_funcs = { 105 .fb_create = drm_gem_fb_create, 106 .atomic_check = tidss_atomic_check, 107 .atomic_commit = drm_atomic_helper_commit, 108 }; 109 110 static int tidss_dispc_modeset_init(struct tidss_device *tidss) 111 { 112 struct device *dev = tidss->dev; 113 unsigned int fourccs_len; 114 const u32 *fourccs = dispc_plane_formats(tidss->dispc, &fourccs_len); 115 unsigned int i; 116 117 struct pipe { 118 u32 hw_videoport; 119 struct drm_bridge *bridge; 120 u32 enc_type; 121 }; 122 123 const struct dispc_features *feat = tidss->feat; 124 u32 max_vps = feat->num_vps; 125 u32 max_planes = feat->num_planes; 126 127 struct pipe pipes[TIDSS_MAX_PORTS]; 128 u32 num_pipes = 0; 129 u32 crtc_mask; 130 131 /* first find all the connected panels & bridges */ 132 133 for (i = 0; i < max_vps; i++) { 134 struct drm_panel *panel; 135 struct drm_bridge *bridge; 136 u32 enc_type = DRM_MODE_ENCODER_NONE; 137 int ret; 138 139 ret = drm_of_find_panel_or_bridge(dev->of_node, i, 0, 140 &panel, &bridge); 141 if (ret == -ENODEV) { 142 dev_dbg(dev, "no panel/bridge for port %d\n", i); 143 continue; 144 } else if (ret) { 145 dev_dbg(dev, "port %d probe returned %d\n", i, ret); 146 return ret; 147 } 148 149 if (panel) { 150 u32 conn_type; 151 152 dev_dbg(dev, "Setting up panel for port %d\n", i); 153 154 switch (feat->vp_bus_type[i]) { 155 case DISPC_VP_OLDI: 156 enc_type = DRM_MODE_ENCODER_LVDS; 157 conn_type = DRM_MODE_CONNECTOR_LVDS; 158 break; 159 case DISPC_VP_DPI: 160 enc_type = DRM_MODE_ENCODER_DPI; 161 conn_type = DRM_MODE_CONNECTOR_DPI; 162 break; 163 default: 164 WARN_ON(1); 165 return -EINVAL; 166 } 167 168 if (panel->connector_type != conn_type) { 169 dev_err(dev, 170 "%s: Panel %s has incompatible connector type for vp%d (%d != %d)\n", 171 __func__, dev_name(panel->dev), i, 172 panel->connector_type, conn_type); 173 return -EINVAL; 174 } 175 176 bridge = devm_drm_panel_bridge_add(dev, panel); 177 if (IS_ERR(bridge)) { 178 dev_err(dev, 179 "failed to set up panel bridge for port %d\n", 180 i); 181 return PTR_ERR(bridge); 182 } 183 } 184 185 pipes[num_pipes].hw_videoport = i; 186 pipes[num_pipes].bridge = bridge; 187 pipes[num_pipes].enc_type = enc_type; 188 num_pipes++; 189 } 190 191 /* all planes can be on any crtc */ 192 crtc_mask = (1 << num_pipes) - 1; 193 194 /* then create a plane, a crtc and an encoder for each panel/bridge */ 195 196 for (i = 0; i < num_pipes; ++i) { 197 struct tidss_plane *tplane; 198 struct tidss_crtc *tcrtc; 199 struct drm_encoder *enc; 200 u32 hw_plane_id = feat->vid_order[tidss->num_planes]; 201 int ret; 202 203 tplane = tidss_plane_create(tidss, hw_plane_id, 204 DRM_PLANE_TYPE_PRIMARY, crtc_mask, 205 fourccs, fourccs_len); 206 if (IS_ERR(tplane)) { 207 dev_err(tidss->dev, "plane create failed\n"); 208 return PTR_ERR(tplane); 209 } 210 211 tidss->planes[tidss->num_planes++] = &tplane->plane; 212 213 tcrtc = tidss_crtc_create(tidss, pipes[i].hw_videoport, 214 &tplane->plane); 215 if (IS_ERR(tcrtc)) { 216 dev_err(tidss->dev, "crtc create failed\n"); 217 return PTR_ERR(tcrtc); 218 } 219 220 tidss->crtcs[tidss->num_crtcs++] = &tcrtc->crtc; 221 222 enc = tidss_encoder_create(tidss, pipes[i].enc_type, 223 1 << tcrtc->crtc.index); 224 if (IS_ERR(enc)) { 225 dev_err(tidss->dev, "encoder create failed\n"); 226 return PTR_ERR(enc); 227 } 228 229 ret = drm_bridge_attach(enc, pipes[i].bridge, NULL, 0); 230 if (ret) { 231 dev_err(tidss->dev, "bridge attach failed: %d\n", ret); 232 return ret; 233 } 234 } 235 236 /* create overlay planes of the leftover planes */ 237 238 while (tidss->num_planes < max_planes) { 239 struct tidss_plane *tplane; 240 u32 hw_plane_id = feat->vid_order[tidss->num_planes]; 241 242 tplane = tidss_plane_create(tidss, hw_plane_id, 243 DRM_PLANE_TYPE_OVERLAY, crtc_mask, 244 fourccs, fourccs_len); 245 246 if (IS_ERR(tplane)) { 247 dev_err(tidss->dev, "plane create failed\n"); 248 return PTR_ERR(tplane); 249 } 250 251 tidss->planes[tidss->num_planes++] = &tplane->plane; 252 } 253 254 return 0; 255 } 256 257 int tidss_modeset_init(struct tidss_device *tidss) 258 { 259 struct drm_device *ddev = &tidss->ddev; 260 int ret; 261 262 dev_dbg(tidss->dev, "%s\n", __func__); 263 264 ret = drmm_mode_config_init(ddev); 265 if (ret) 266 return ret; 267 268 ddev->mode_config.min_width = 8; 269 ddev->mode_config.min_height = 8; 270 ddev->mode_config.max_width = 8096; 271 ddev->mode_config.max_height = 8096; 272 ddev->mode_config.normalize_zpos = true; 273 ddev->mode_config.funcs = &mode_config_funcs; 274 ddev->mode_config.helper_private = &mode_config_helper_funcs; 275 276 ret = tidss_dispc_modeset_init(tidss); 277 if (ret) 278 return ret; 279 280 ret = drm_vblank_init(ddev, tidss->num_crtcs); 281 if (ret) 282 return ret; 283 284 drm_mode_config_reset(ddev); 285 286 dev_dbg(tidss->dev, "%s done\n", __func__); 287 288 return 0; 289 } 290