drivers/gpu/drm/sti/sti_mixer.c

   1 /*
   2  * Copyright (C) STMicroelectronics SA 2014
   3  * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
   4  *          Fabien Dessenne <fabien.dessenne@st.com>
   5  *          for STMicroelectronics.
   6  * License terms:  GNU General Public License (GPL), version 2
   7  */
   8 #include <linux/seq_file.h>
   9
  10 #include "sti_compositor.h"
  11 #include "sti_mixer.h"
  12 #include "sti_vtg.h"
  13
  14 /* Module parameter to set the background color of the mixer */
  15 static unsigned int bkg_color = 0x000000;
  16 MODULE_PARM_DESC(bkgcolor, "Value of the background color 0xRRGGBB");
  17 module_param_named(bkgcolor, bkg_color, int, 0644);
  18
  19 /* Identity: G=Y , B=Cb , R=Cr */
  20 static const u32 mixerColorSpaceMatIdentity[] = {
  21         0x10000000, 0x00000000, 0x10000000, 0x00001000,
  22         0x00000000, 0x00000000, 0x00000000, 0x00000000
  23 };
  24
  25 /* regs offset */
  26 #define GAM_MIXER_CTL      0x00
  27 #define GAM_MIXER_BKC      0x04
  28 #define GAM_MIXER_BCO      0x0C
  29 #define GAM_MIXER_BCS      0x10
  30 #define GAM_MIXER_AVO      0x28
  31 #define GAM_MIXER_AVS      0x2C
  32 #define GAM_MIXER_CRB      0x34
  33 #define GAM_MIXER_ACT      0x38
  34 #define GAM_MIXER_MBP      0x3C
  35 #define GAM_MIXER_MX0      0x80
  36
  37 /* id for depth of CRB reg */
  38 #define GAM_DEPTH_VID0_ID  1
  39 #define GAM_DEPTH_VID1_ID  2
  40 #define GAM_DEPTH_GDP0_ID  3
  41 #define GAM_DEPTH_GDP1_ID  4
  42 #define GAM_DEPTH_GDP2_ID  5
  43 #define GAM_DEPTH_GDP3_ID  6
  44 #define GAM_DEPTH_MASK_ID  7
  45
  46 /* mask in CTL reg */
  47 #define GAM_CTL_BACK_MASK  BIT(0)
  48 #define GAM_CTL_VID0_MASK  BIT(1)
  49 #define GAM_CTL_VID1_MASK  BIT(2)
  50 #define GAM_CTL_GDP0_MASK  BIT(3)
  51 #define GAM_CTL_GDP1_MASK  BIT(4)
  52 #define GAM_CTL_GDP2_MASK  BIT(5)
  53 #define GAM_CTL_GDP3_MASK  BIT(6)
  54 #define GAM_CTL_CURSOR_MASK BIT(9)
  55
  56 const char *sti_mixer_to_str(struct sti_mixer *mixer)
  57 {
  58         switch (mixer->id) {
  59         case STI_MIXER_MAIN:
  60                 return "MAIN_MIXER";
  61         case STI_MIXER_AUX:
  62                 return "AUX_MIXER";
  63         default:
  64                 return "<UNKNOWN MIXER>";
  65         }
  66 }
  67
  68 static inline u32 sti_mixer_reg_read(struct sti_mixer *mixer, u32 reg_id)
  69 {
  70         return readl(mixer->regs + reg_id);
  71 }
  72
  73 static inline void sti_mixer_reg_write(struct sti_mixer *mixer,
  74                                        u32 reg_id, u32 val)
  75 {
  76         writel(val, mixer->regs + reg_id);
  77 }
  78
  79 #define DBGFS_DUMP(reg) seq_printf(s, "\n  %-25s 0x%08X", #reg, \
  80                                    sti_mixer_reg_read(mixer, reg))
  81
  82 static void mixer_dbg_ctl(struct seq_file *s, int val)
  83 {
  84         unsigned int i;
  85         int count = 0;
  86         char *const disp_layer[] = {"BKG", "VID0", "VID1", "GDP0",
  87                                     "GDP1", "GDP2", "GDP3"};
  88
  89         seq_puts(s, "\tEnabled: ");
  90         for (i = 0; i < 7; i++) {
  91                 if (val & 1) {
  92                         seq_printf(s, "%s ", disp_layer[i]);
  93                         count++;
  94                 }
  95                 val = val >> 1;
  96         }
  97
  98         val = val >> 2;
  99         if (val & 1) {
 100                 seq_puts(s, "CURS ");
 101                 count++;
 102         }
 103         if (!count)
 104                 seq_puts(s, "Nothing");
 105 }
 106
 107 static void mixer_dbg_crb(struct seq_file *s, int val)
 108 {
 109         int i;
 110
 111         seq_puts(s, "\tDepth: ");
 112         for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) {
 113                 switch (val & GAM_DEPTH_MASK_ID) {
 114                 case GAM_DEPTH_VID0_ID:
 115                         seq_puts(s, "VID0");
 116                         break;
 117                 case GAM_DEPTH_VID1_ID:
 118                         seq_puts(s, "VID1");
 119                         break;
 120                 case GAM_DEPTH_GDP0_ID:
 121                         seq_puts(s, "GDP0");
 122                         break;
 123                 case GAM_DEPTH_GDP1_ID:
 124                         seq_puts(s, "GDP1");
 125                         break;
 126                 case GAM_DEPTH_GDP2_ID:
 127                         seq_puts(s, "GDP2");
 128                         break;
 129                 case GAM_DEPTH_GDP3_ID:
 130                         seq_puts(s, "GDP3");
 131                         break;
 132                 default:
 133                         seq_puts(s, "---");
 134                 }
 135
 136                 if (i < GAM_MIXER_NB_DEPTH_LEVEL - 1)
 137                         seq_puts(s, " < ");
 138                 val = val >> 3;
 139         }
 140 }
 141
 142 static void mixer_dbg_mxn(struct seq_file *s, void *addr)
 143 {
 144         int i;
 145
 146         for (i = 1; i < 8; i++)
 147                 seq_printf(s, "-0x%08X", (int)readl(addr + i * 4));
 148 }
 149
 150 static int mixer_dbg_show(struct seq_file *s, void *arg)
 151 {
 152         struct drm_info_node *node = s->private;
 153         struct sti_mixer *mixer = (struct sti_mixer *)node->info_ent->data;
 154
 155         seq_printf(s, "%s: (vaddr = 0x%p)",
 156                    sti_mixer_to_str(mixer), mixer->regs);
 157
 158         DBGFS_DUMP(GAM_MIXER_CTL);
 159         mixer_dbg_ctl(s, sti_mixer_reg_read(mixer, GAM_MIXER_CTL));
 160         DBGFS_DUMP(GAM_MIXER_BKC);
 161         DBGFS_DUMP(GAM_MIXER_BCO);
 162         DBGFS_DUMP(GAM_MIXER_BCS);
 163         DBGFS_DUMP(GAM_MIXER_AVO);
 164         DBGFS_DUMP(GAM_MIXER_AVS);
 165         DBGFS_DUMP(GAM_MIXER_CRB);
 166         mixer_dbg_crb(s, sti_mixer_reg_read(mixer, GAM_MIXER_CRB));
 167         DBGFS_DUMP(GAM_MIXER_ACT);
 168         DBGFS_DUMP(GAM_MIXER_MBP);
 169         DBGFS_DUMP(GAM_MIXER_MX0);
 170         mixer_dbg_mxn(s, mixer->regs + GAM_MIXER_MX0);
 171         seq_puts(s, "\n");
 172
 173         return 0;
 174 }
 175
 176 static struct drm_info_list mixer0_debugfs_files[] = {
 177         { "mixer_main", mixer_dbg_show, 0, NULL },
 178 };
 179
 180 static struct drm_info_list mixer1_debugfs_files[] = {
 181         { "mixer_aux", mixer_dbg_show, 0, NULL },
 182 };
 183
 184 int sti_mixer_debugfs_init(struct sti_mixer *mixer, struct drm_minor *minor)
 185 {
 186         unsigned int i;
 187         struct drm_info_list *mixer_debugfs_files;
 188         int nb_files;
 189
 190         switch (mixer->id) {
 191         case STI_MIXER_MAIN:
 192                 mixer_debugfs_files = mixer0_debugfs_files;
 193                 nb_files = ARRAY_SIZE(mixer0_debugfs_files);
 194                 break;
 195         case STI_MIXER_AUX:
 196                 mixer_debugfs_files = mixer1_debugfs_files;
 197                 nb_files = ARRAY_SIZE(mixer1_debugfs_files);
 198                 break;
 199         default:
 200                 return -EINVAL;
 201         }
 202
 203         for (i = 0; i < nb_files; i++)
 204                 mixer_debugfs_files[i].data = mixer;
 205
 206         return drm_debugfs_create_files(mixer_debugfs_files,
 207                                         nb_files,
 208                                         minor->debugfs_root, minor);
 209 }
 210
 211 void sti_mixer_set_background_status(struct sti_mixer *mixer, bool enable)
 212 {
 213         u32 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
 214
 215         val &= ~GAM_CTL_BACK_MASK;
 216         val |= enable;
 217         sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
 218 }
 219
 220 static void sti_mixer_set_background_color(struct sti_mixer *mixer,
 221                                            unsigned int rgb)
 222 {
 223         sti_mixer_reg_write(mixer, GAM_MIXER_BKC, rgb);
 224 }
 225
 226 static void sti_mixer_set_background_area(struct sti_mixer *mixer,
 227                                           struct drm_display_mode *mode)
 228 {
 229         u32 ydo, xdo, yds, xds;
 230
 231         ydo = sti_vtg_get_line_number(*mode, 0);
 232         yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
 233         xdo = sti_vtg_get_pixel_number(*mode, 0);
 234         xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
 235
 236         sti_mixer_reg_write(mixer, GAM_MIXER_BCO, ydo << 16 | xdo);
 237         sti_mixer_reg_write(mixer, GAM_MIXER_BCS, yds << 16 | xds);
 238 }
 239
 240 int sti_mixer_set_plane_depth(struct sti_mixer *mixer, struct sti_plane *plane)
 241 {
 242         int plane_id, depth = plane->zorder;
 243         unsigned int i;
 244         u32 mask, val;
 245
 246         if ((depth < 1) || (depth > GAM_MIXER_NB_DEPTH_LEVEL))
 247                 return 1;
 248
 249         switch (plane->desc) {
 250         case STI_GDP_0:
 251                 plane_id = GAM_DEPTH_GDP0_ID;
 252                 break;
 253         case STI_GDP_1:
 254                 plane_id = GAM_DEPTH_GDP1_ID;
 255                 break;
 256         case STI_GDP_2:
 257                 plane_id = GAM_DEPTH_GDP2_ID;
 258                 break;
 259         case STI_GDP_3:
 260                 plane_id = GAM_DEPTH_GDP3_ID;
 261                 break;
 262         case STI_HQVDP_0:
 263                 plane_id = GAM_DEPTH_VID0_ID;
 264                 break;
 265         case STI_CURSOR:
 266                 /* no need to set depth for cursor */
 267                 return 0;
 268         default:
 269                 DRM_ERROR("Unknown plane %d\n", plane->desc);
 270                 return 1;
 271         }
 272
 273         /* Search if a previous depth was already assigned to the plane */
 274         val = sti_mixer_reg_read(mixer, GAM_MIXER_CRB);
 275         for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) {
 276                 mask = GAM_DEPTH_MASK_ID << (3 * i);
 277                 if ((val & mask) == plane_id << (3 * i))
 278                         break;
 279         }
 280
 281         mask |= GAM_DEPTH_MASK_ID << (3 * (depth - 1));
 282         plane_id = plane_id << (3 * (depth - 1));
 283
 284         DRM_DEBUG_DRIVER("%s %s depth=%d\n", sti_mixer_to_str(mixer),
 285                          sti_plane_to_str(plane), depth);
 286         dev_dbg(mixer->dev, "GAM_MIXER_CRB val 0x%x mask 0x%x\n",
 287                 plane_id, mask);
 288
 289         val &= ~mask;
 290         val |= plane_id;
 291         sti_mixer_reg_write(mixer, GAM_MIXER_CRB, val);
 292
 293         dev_dbg(mixer->dev, "Read GAM_MIXER_CRB 0x%x\n",
 294                 sti_mixer_reg_read(mixer, GAM_MIXER_CRB));
 295         return 0;
 296 }
 297
 298 int sti_mixer_active_video_area(struct sti_mixer *mixer,
 299                                 struct drm_display_mode *mode)
 300 {
 301         u32 ydo, xdo, yds, xds;
 302
 303         ydo = sti_vtg_get_line_number(*mode, 0);
 304         yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
 305         xdo = sti_vtg_get_pixel_number(*mode, 0);
 306         xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
 307
 308         DRM_DEBUG_DRIVER("%s active video area xdo:%d ydo:%d xds:%d yds:%d\n",
 309                          sti_mixer_to_str(mixer), xdo, ydo, xds, yds);
 310         sti_mixer_reg_write(mixer, GAM_MIXER_AVO, ydo << 16 | xdo);
 311         sti_mixer_reg_write(mixer, GAM_MIXER_AVS, yds << 16 | xds);
 312
 313         sti_mixer_set_background_color(mixer, bkg_color);
 314
 315         sti_mixer_set_background_area(mixer, mode);
 316         sti_mixer_set_background_status(mixer, true);
 317         return 0;
 318 }
 319
 320 static u32 sti_mixer_get_plane_mask(struct sti_plane *plane)
 321 {
 322         switch (plane->desc) {
 323         case STI_BACK:
 324                 return GAM_CTL_BACK_MASK;
 325         case STI_GDP_0:
 326                 return GAM_CTL_GDP0_MASK;
 327         case STI_GDP_1:
 328                 return GAM_CTL_GDP1_MASK;
 329         case STI_GDP_2:
 330                 return GAM_CTL_GDP2_MASK;
 331         case STI_GDP_3:
 332                 return GAM_CTL_GDP3_MASK;
 333         case STI_HQVDP_0:
 334                 return GAM_CTL_VID0_MASK;
 335         case STI_CURSOR:
 336                 return GAM_CTL_CURSOR_MASK;
 337         default:
 338                 return 0;
 339         }
 340 }
 341
 342 int sti_mixer_set_plane_status(struct sti_mixer *mixer,
 343                                struct sti_plane *plane, bool status)
 344 {
 345         u32 mask, val;
 346
 347         DRM_DEBUG_DRIVER("%s %s %s\n", status ? "enable" : "disable",
 348                          sti_mixer_to_str(mixer), sti_plane_to_str(plane));
 349
 350         mask = sti_mixer_get_plane_mask(plane);
 351         if (!mask) {
 352                 DRM_ERROR("Can't find layer mask\n");
 353                 return -EINVAL;
 354         }
 355
 356         val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
 357         val &= ~mask;
 358         val |= status ? mask : 0;
 359         sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
 360
 361         return 0;
 362 }
 363
 364 void sti_mixer_set_matrix(struct sti_mixer *mixer)
 365 {
 366         unsigned int i;
 367
 368         for (i = 0; i < ARRAY_SIZE(mixerColorSpaceMatIdentity); i++)
 369                 sti_mixer_reg_write(mixer, GAM_MIXER_MX0 + (i * 4),
 370                                     mixerColorSpaceMatIdentity[i]);
 371 }
 372
 373 struct sti_mixer *sti_mixer_create(struct device *dev,
 374                                    struct drm_device *drm_dev,
 375                                    int id,
 376                                    void __iomem *baseaddr)
 377 {
 378         struct sti_mixer *mixer = devm_kzalloc(dev, sizeof(*mixer), GFP_KERNEL);
 379         struct device_node *np = dev->of_node;
 380
 381         dev_dbg(dev, "%s\n", __func__);
 382         if (!mixer) {
 383                 DRM_ERROR("Failed to allocated memory for mixer\n");
 384                 return NULL;
 385         }
 386         mixer->regs = baseaddr;
 387         mixer->dev = dev;
 388         mixer->id = id;
 389
 390         if (of_device_is_compatible(np, "st,stih416-compositor"))
 391                 sti_mixer_set_matrix(mixer);
 392
 393         DRM_DEBUG_DRIVER("%s created. Regs=%p\n",
 394                          sti_mixer_to_str(mixer), mixer->regs);
 395
 396         return mixer;
 397 }