drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "mdp4_kms.h"
  19
  20
  21 struct mdp4_plane {
  22         struct drm_plane base;
  23         const char *name;
  24
  25         enum mdp4_pipe pipe;
  26
  27         uint32_t nformats;
  28         uint32_t formats[32];
  29
  30         bool enabled;
  31 };
  32 #define to_mdp4_plane(x) container_of(x, struct mdp4_plane, base)
  33
  34 static void mdp4_plane_set_scanout(struct drm_plane *plane,
  35                 struct drm_framebuffer *fb);
  36 static int mdp4_plane_mode_set(struct drm_plane *plane,
  37                 struct drm_crtc *crtc, struct drm_framebuffer *fb,
  38                 int crtc_x, int crtc_y,
  39                 unsigned int crtc_w, unsigned int crtc_h,
  40                 uint32_t src_x, uint32_t src_y,
  41                 uint32_t src_w, uint32_t src_h);
  42
  43 static struct mdp4_kms *get_kms(struct drm_plane *plane)
  44 {
  45         struct msm_drm_private *priv = plane->dev->dev_private;
  46         return to_mdp4_kms(to_mdp_kms(priv->kms));
  47 }
  48
  49 static void mdp4_plane_destroy(struct drm_plane *plane)
  50 {
  51         struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
  52
  53         drm_plane_helper_disable(plane);
  54         drm_plane_cleanup(plane);
  55
  56         kfree(mdp4_plane);
  57 }
  58
  59 /* helper to install properties which are common to planes and crtcs */
  60 void mdp4_plane_install_properties(struct drm_plane *plane,
  61                 struct drm_mode_object *obj)
  62 {
  63         // XXX
  64 }
  65
  66 int mdp4_plane_set_property(struct drm_plane *plane,
  67                 struct drm_property *property, uint64_t val)
  68 {
  69         // XXX
  70         return -EINVAL;
  71 }
  72
  73 static const struct drm_plane_funcs mdp4_plane_funcs = {
  74                 .update_plane = drm_atomic_helper_update_plane,
  75                 .disable_plane = drm_atomic_helper_disable_plane,
  76                 .destroy = mdp4_plane_destroy,
  77                 .set_property = mdp4_plane_set_property,
  78                 .reset = drm_atomic_helper_plane_reset,
  79                 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
  80                 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
  81 };
  82
  83 static int mdp4_plane_prepare_fb(struct drm_plane *plane,
  84                 struct drm_framebuffer *fb)
  85 {
  86         struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
  87         struct mdp4_kms *mdp4_kms = get_kms(plane);
  88
  89         DBG("%s: prepare: FB[%u]", mdp4_plane->name, fb->base.id);
  90         return msm_framebuffer_prepare(fb, mdp4_kms->id);
  91 }
  92
  93 static void mdp4_plane_cleanup_fb(struct drm_plane *plane,
  94                 struct drm_framebuffer *fb)
  95 {
  96         struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
  97         struct mdp4_kms *mdp4_kms = get_kms(plane);
  98
  99         DBG("%s: cleanup: FB[%u]", mdp4_plane->name, fb->base.id);
 100         msm_framebuffer_cleanup(fb, mdp4_kms->id);
 101 }
 102
 103
 104 static int mdp4_plane_atomic_check(struct drm_plane *plane,
 105                 struct drm_plane_state *state)
 106 {
 107         return 0;
 108 }
 109
 110 static void mdp4_plane_atomic_update(struct drm_plane *plane)
 111 {
 112         struct drm_plane_state *state = plane->state;
 113         int ret;
 114
 115         ret = mdp4_plane_mode_set(plane,
 116                         state->crtc, state->fb,
 117                         state->crtc_x, state->crtc_y,
 118                         state->crtc_w, state->crtc_h,
 119                         state->src_x,  state->src_y,
 120                         state->src_w, state->src_h);
 121         /* atomic_check should have ensured that this doesn't fail */
 122         WARN_ON(ret < 0);
 123 }
 124
 125 static const struct drm_plane_helper_funcs mdp4_plane_helper_funcs = {
 126                 .prepare_fb = mdp4_plane_prepare_fb,
 127                 .cleanup_fb = mdp4_plane_cleanup_fb,
 128                 .atomic_check = mdp4_plane_atomic_check,
 129                 .atomic_update = mdp4_plane_atomic_update,
 130 };
 131
 132 static void mdp4_plane_set_scanout(struct drm_plane *plane,
 133                 struct drm_framebuffer *fb)
 134 {
 135         struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
 136         struct mdp4_kms *mdp4_kms = get_kms(plane);
 137         enum mdp4_pipe pipe = mdp4_plane->pipe;
 138         uint32_t iova = msm_framebuffer_iova(fb, mdp4_kms->id, 0);
 139
 140         DBG("%s: set_scanout: %08x (%u)", mdp4_plane->name,
 141                         iova, fb->pitches[0]);
 142
 143         mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_STRIDE_A(pipe),
 144                         MDP4_PIPE_SRC_STRIDE_A_P0(fb->pitches[0]) |
 145                         MDP4_PIPE_SRC_STRIDE_A_P1(fb->pitches[1]));
 146
 147         mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_STRIDE_B(pipe),
 148                         MDP4_PIPE_SRC_STRIDE_B_P2(fb->pitches[2]) |
 149                         MDP4_PIPE_SRC_STRIDE_B_P3(fb->pitches[3]));
 150
 151         mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP0_BASE(pipe), iova);
 152
 153         plane->fb = fb;
 154 }
 155
 156 #define MDP4_VG_PHASE_STEP_DEFAULT      0x20000000
 157
 158 static int mdp4_plane_mode_set(struct drm_plane *plane,
 159                 struct drm_crtc *crtc, struct drm_framebuffer *fb,
 160                 int crtc_x, int crtc_y,
 161                 unsigned int crtc_w, unsigned int crtc_h,
 162                 uint32_t src_x, uint32_t src_y,
 163                 uint32_t src_w, uint32_t src_h)
 164 {
 165         struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
 166         struct mdp4_kms *mdp4_kms = get_kms(plane);
 167         enum mdp4_pipe pipe = mdp4_plane->pipe;
 168         const struct mdp_format *format;
 169         uint32_t op_mode = 0;
 170         uint32_t phasex_step = MDP4_VG_PHASE_STEP_DEFAULT;
 171         uint32_t phasey_step = MDP4_VG_PHASE_STEP_DEFAULT;
 172
 173         if (!(crtc && fb)) {
 174                 DBG("%s: disabled!", mdp4_plane->name);
 175                 return 0;
 176         }
 177
 178         /* src values are in Q16 fixed point, convert to integer: */
 179         src_x = src_x >> 16;
 180         src_y = src_y >> 16;
 181         src_w = src_w >> 16;
 182         src_h = src_h >> 16;
 183
 184         DBG("%s: FB[%u] %u,%u,%u,%u -> CRTC[%u] %d,%d,%u,%u", mdp4_plane->name,
 185                         fb->base.id, src_x, src_y, src_w, src_h,
 186                         crtc->base.id, crtc_x, crtc_y, crtc_w, crtc_h);
 187
 188         if (src_w != crtc_w) {
 189                 op_mode |= MDP4_PIPE_OP_MODE_SCALEX_EN;
 190                 /* TODO calc phasex_step */
 191         }
 192
 193         if (src_h != crtc_h) {
 194                 op_mode |= MDP4_PIPE_OP_MODE_SCALEY_EN;
 195                 /* TODO calc phasey_step */
 196         }
 197
 198         mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_SIZE(pipe),
 199                         MDP4_PIPE_SRC_SIZE_WIDTH(src_w) |
 200                         MDP4_PIPE_SRC_SIZE_HEIGHT(src_h));
 201
 202         mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_XY(pipe),
 203                         MDP4_PIPE_SRC_XY_X(src_x) |
 204                         MDP4_PIPE_SRC_XY_Y(src_y));
 205
 206         mdp4_write(mdp4_kms, REG_MDP4_PIPE_DST_SIZE(pipe),
 207                         MDP4_PIPE_DST_SIZE_WIDTH(crtc_w) |
 208                         MDP4_PIPE_DST_SIZE_HEIGHT(crtc_h));
 209
 210         mdp4_write(mdp4_kms, REG_MDP4_PIPE_DST_XY(pipe),
 211                         MDP4_PIPE_DST_XY_X(crtc_x) |
 212                         MDP4_PIPE_DST_XY_Y(crtc_y));
 213
 214         mdp4_plane_set_scanout(plane, fb);
 215
 216         format = to_mdp_format(msm_framebuffer_format(fb));
 217
 218         mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_FORMAT(pipe),
 219                         MDP4_PIPE_SRC_FORMAT_A_BPC(format->bpc_a) |
 220                         MDP4_PIPE_SRC_FORMAT_R_BPC(format->bpc_r) |
 221                         MDP4_PIPE_SRC_FORMAT_G_BPC(format->bpc_g) |
 222                         MDP4_PIPE_SRC_FORMAT_B_BPC(format->bpc_b) |
 223                         COND(format->alpha_enable, MDP4_PIPE_SRC_FORMAT_ALPHA_ENABLE) |
 224                         MDP4_PIPE_SRC_FORMAT_CPP(format->cpp - 1) |
 225                         MDP4_PIPE_SRC_FORMAT_UNPACK_COUNT(format->unpack_count - 1) |
 226                         COND(format->unpack_tight, MDP4_PIPE_SRC_FORMAT_UNPACK_TIGHT));
 227
 228         mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_UNPACK(pipe),
 229                         MDP4_PIPE_SRC_UNPACK_ELEM0(format->unpack[0]) |
 230                         MDP4_PIPE_SRC_UNPACK_ELEM1(format->unpack[1]) |
 231                         MDP4_PIPE_SRC_UNPACK_ELEM2(format->unpack[2]) |
 232                         MDP4_PIPE_SRC_UNPACK_ELEM3(format->unpack[3]));
 233
 234         mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(pipe), op_mode);
 235         mdp4_write(mdp4_kms, REG_MDP4_PIPE_PHASEX_STEP(pipe), phasex_step);
 236         mdp4_write(mdp4_kms, REG_MDP4_PIPE_PHASEY_STEP(pipe), phasey_step);
 237
 238         return 0;
 239 }
 240
 241 static const char *pipe_names[] = {
 242                 "VG1", "VG2",
 243                 "RGB1", "RGB2", "RGB3",
 244                 "VG3", "VG4",
 245 };
 246
 247 enum mdp4_pipe mdp4_plane_pipe(struct drm_plane *plane)
 248 {
 249         struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
 250         return mdp4_plane->pipe;
 251 }
 252
 253 /* initialize plane */
 254 struct drm_plane *mdp4_plane_init(struct drm_device *dev,
 255                 enum mdp4_pipe pipe_id, bool private_plane)
 256 {
 257         struct drm_plane *plane = NULL;
 258         struct mdp4_plane *mdp4_plane;
 259         int ret;
 260         enum drm_plane_type type;
 261
 262         mdp4_plane = kzalloc(sizeof(*mdp4_plane), GFP_KERNEL);
 263         if (!mdp4_plane) {
 264                 ret = -ENOMEM;
 265                 goto fail;
 266         }
 267
 268         plane = &mdp4_plane->base;
 269
 270         mdp4_plane->pipe = pipe_id;
 271         mdp4_plane->name = pipe_names[pipe_id];
 272
 273         mdp4_plane->nformats = mdp4_get_formats(pipe_id, mdp4_plane->formats,
 274                         ARRAY_SIZE(mdp4_plane->formats));
 275
 276         type = private_plane ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
 277         ret = drm_universal_plane_init(dev, plane, 0xff, &mdp4_plane_funcs,
 278                                  mdp4_plane->formats, mdp4_plane->nformats, type);
 279         if (ret)
 280                 goto fail;
 281
 282         drm_plane_helper_add(plane, &mdp4_plane_helper_funcs);
 283
 284         mdp4_plane_install_properties(plane, &plane->base);
 285
 286         return plane;
 287
 288 fail:
 289         if (plane)
 290                 mdp4_plane_destroy(plane);
 291
 292         return ERR_PTR(ret);
 293 }