drivers/gpu/drm/tidss/tidss_kms.c

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