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