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_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, 0);
  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                         dev_dbg(dev, "port %d probe returned %d\n", i, ret);
 139                         return ret;
 140                 }
 141
 142                 if (panel) {
 143                         u32 conn_type;
 144
 145                         dev_dbg(dev, "Setting up panel for port %d\n", i);
 146
 147                         switch (feat->vp_bus_type[i]) {
 148                         case DISPC_VP_OLDI:
 149                                 enc_type = DRM_MODE_ENCODER_LVDS;
 150                                 conn_type = DRM_MODE_CONNECTOR_LVDS;
 151                                 break;
 152                         case DISPC_VP_DPI:
 153                                 enc_type = DRM_MODE_ENCODER_DPI;
 154                                 conn_type = DRM_MODE_CONNECTOR_DPI;
 155                                 break;
 156                         default:
 157                                 WARN_ON(1);
 158                                 return -EINVAL;
 159                         }
 160
 161                         if (panel->connector_type != conn_type) {
 162                                 dev_err(dev,
 163                                         "%s: Panel %s has incompatible connector type for vp%d (%d != %d)\n",
 164                                          __func__, dev_name(panel->dev), i,
 165                                          panel->connector_type, conn_type);
 166                                 return -EINVAL;
 167                         }
 168
 169                         bridge = devm_drm_panel_bridge_add(dev, panel);
 170                         if (IS_ERR(bridge)) {
 171                                 dev_err(dev,
 172                                         "failed to set up panel bridge for port %d\n",
 173                                         i);
 174                                 return PTR_ERR(bridge);
 175                         }
 176                 }
 177
 178                 pipes[num_pipes].hw_videoport = i;
 179                 pipes[num_pipes].bridge = bridge;
 180                 pipes[num_pipes].enc_type = enc_type;
 181                 num_pipes++;
 182         }
 183
 184         /* all planes can be on any crtc */
 185         crtc_mask = (1 << num_pipes) - 1;
 186
 187         /* then create a plane, a crtc and an encoder for each panel/bridge */
 188
 189         for (i = 0; i < num_pipes; ++i) {
 190                 struct tidss_plane *tplane;
 191                 struct tidss_crtc *tcrtc;
 192                 u32 hw_plane_id = feat->vid_order[tidss->num_planes];
 193                 int ret;
 194
 195                 tplane = tidss_plane_create(tidss, hw_plane_id,
 196                                             DRM_PLANE_TYPE_PRIMARY, crtc_mask,
 197                                             fourccs, fourccs_len);
 198                 if (IS_ERR(tplane)) {
 199                         dev_err(tidss->dev, "plane create failed\n");
 200                         return PTR_ERR(tplane);
 201                 }
 202
 203                 tidss->planes[tidss->num_planes++] = &tplane->plane;
 204
 205                 tcrtc = tidss_crtc_create(tidss, pipes[i].hw_videoport,
 206                                           &tplane->plane);
 207                 if (IS_ERR(tcrtc)) {
 208                         dev_err(tidss->dev, "crtc create failed\n");
 209                         return PTR_ERR(tcrtc);
 210                 }
 211
 212                 tidss->crtcs[tidss->num_crtcs++] = &tcrtc->crtc;
 213
 214                 ret = tidss_encoder_create(tidss, pipes[i].bridge,
 215                                            pipes[i].enc_type,
 216                                            1 << tcrtc->crtc.index);
 217                 if (ret) {
 218                         dev_err(tidss->dev, "encoder create failed\n");
 219                         return ret;
 220                 }
 221         }
 222
 223         /* create overlay planes of the leftover planes */
 224
 225         while (tidss->num_planes < max_planes) {
 226                 struct tidss_plane *tplane;
 227                 u32 hw_plane_id = feat->vid_order[tidss->num_planes];
 228
 229                 tplane = tidss_plane_create(tidss, hw_plane_id,
 230                                             DRM_PLANE_TYPE_OVERLAY, crtc_mask,
 231                                             fourccs, fourccs_len);
 232
 233                 if (IS_ERR(tplane)) {
 234                         dev_err(tidss->dev, "plane create failed\n");
 235                         return PTR_ERR(tplane);
 236                 }
 237
 238                 tidss->planes[tidss->num_planes++] = &tplane->plane;
 239         }
 240
 241         return 0;
 242 }
 243
 244 int tidss_modeset_init(struct tidss_device *tidss)
 245 {
 246         struct drm_device *ddev = &tidss->ddev;
 247         int ret;
 248
 249         dev_dbg(tidss->dev, "%s\n", __func__);
 250
 251         ret = drmm_mode_config_init(ddev);
 252         if (ret)
 253                 return ret;
 254
 255         ddev->mode_config.min_width = 8;
 256         ddev->mode_config.min_height = 8;
 257         ddev->mode_config.max_width = 8096;
 258         ddev->mode_config.max_height = 8096;
 259         ddev->mode_config.normalize_zpos = true;
 260         ddev->mode_config.funcs = &mode_config_funcs;
 261         ddev->mode_config.helper_private = &mode_config_helper_funcs;
 262
 263         ret = tidss_dispc_modeset_init(tidss);
 264         if (ret)
 265                 return ret;
 266
 267         ret = drm_vblank_init(ddev, tidss->num_crtcs);
 268         if (ret)
 269                 return ret;
 270
 271         drm_mode_config_reset(ddev);
 272
 273         dev_dbg(tidss->dev, "%s done\n", __func__);
 274
 275         return 0;
 276 }