1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) STMicroelectronics SA 2014 4 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com> 5 * Fabien Dessenne <fabien.dessenne@st.com> 6 * for STMicroelectronics. 7 */ 8 9 #include <linux/moduleparam.h> 10 #include <linux/seq_file.h> 11 12 #include <drm/drm_print.h> 13 14 #include "sti_compositor.h" 15 #include "sti_mixer.h" 16 #include "sti_vtg.h" 17 18 /* Module parameter to set the background color of the mixer */ 19 static unsigned int bkg_color = 0x000000; 20 MODULE_PARM_DESC(bkgcolor, "Value of the background color 0xRRGGBB"); 21 module_param_named(bkgcolor, bkg_color, int, 0644); 22 23 /* regs offset */ 24 #define GAM_MIXER_CTL 0x00 25 #define GAM_MIXER_BKC 0x04 26 #define GAM_MIXER_BCO 0x0C 27 #define GAM_MIXER_BCS 0x10 28 #define GAM_MIXER_AVO 0x28 29 #define GAM_MIXER_AVS 0x2C 30 #define GAM_MIXER_CRB 0x34 31 #define GAM_MIXER_ACT 0x38 32 #define GAM_MIXER_MBP 0x3C 33 #define GAM_MIXER_MX0 0x80 34 35 /* id for depth of CRB reg */ 36 #define GAM_DEPTH_VID0_ID 1 37 #define GAM_DEPTH_VID1_ID 2 38 #define GAM_DEPTH_GDP0_ID 3 39 #define GAM_DEPTH_GDP1_ID 4 40 #define GAM_DEPTH_GDP2_ID 5 41 #define GAM_DEPTH_GDP3_ID 6 42 #define GAM_DEPTH_MASK_ID 7 43 44 /* mask in CTL reg */ 45 #define GAM_CTL_BACK_MASK BIT(0) 46 #define GAM_CTL_VID0_MASK BIT(1) 47 #define GAM_CTL_VID1_MASK BIT(2) 48 #define GAM_CTL_GDP0_MASK BIT(3) 49 #define GAM_CTL_GDP1_MASK BIT(4) 50 #define GAM_CTL_GDP2_MASK BIT(5) 51 #define GAM_CTL_GDP3_MASK BIT(6) 52 #define GAM_CTL_CURSOR_MASK BIT(9) 53 54 const char *sti_mixer_to_str(struct sti_mixer *mixer) 55 { 56 switch (mixer->id) { 57 case STI_MIXER_MAIN: 58 return "MAIN_MIXER"; 59 case STI_MIXER_AUX: 60 return "AUX_MIXER"; 61 default: 62 return "<UNKNOWN MIXER>"; 63 } 64 } 65 66 static inline u32 sti_mixer_reg_read(struct sti_mixer *mixer, u32 reg_id) 67 { 68 return readl(mixer->regs + reg_id); 69 } 70 71 static inline void sti_mixer_reg_write(struct sti_mixer *mixer, 72 u32 reg_id, u32 val) 73 { 74 writel(val, mixer->regs + reg_id); 75 } 76 77 #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \ 78 sti_mixer_reg_read(mixer, reg)) 79 80 static void mixer_dbg_ctl(struct seq_file *s, int val) 81 { 82 unsigned int i; 83 int count = 0; 84 char *const disp_layer[] = {"BKG", "VID0", "VID1", "GDP0", 85 "GDP1", "GDP2", "GDP3"}; 86 87 seq_puts(s, "\tEnabled: "); 88 for (i = 0; i < 7; i++) { 89 if (val & 1) { 90 seq_printf(s, "%s ", disp_layer[i]); 91 count++; 92 } 93 val = val >> 1; 94 } 95 96 val = val >> 2; 97 if (val & 1) { 98 seq_puts(s, "CURS "); 99 count++; 100 } 101 if (!count) 102 seq_puts(s, "Nothing"); 103 } 104 105 static void mixer_dbg_crb(struct seq_file *s, int val) 106 { 107 int i; 108 109 seq_puts(s, "\tDepth: "); 110 for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) { 111 switch (val & GAM_DEPTH_MASK_ID) { 112 case GAM_DEPTH_VID0_ID: 113 seq_puts(s, "VID0"); 114 break; 115 case GAM_DEPTH_VID1_ID: 116 seq_puts(s, "VID1"); 117 break; 118 case GAM_DEPTH_GDP0_ID: 119 seq_puts(s, "GDP0"); 120 break; 121 case GAM_DEPTH_GDP1_ID: 122 seq_puts(s, "GDP1"); 123 break; 124 case GAM_DEPTH_GDP2_ID: 125 seq_puts(s, "GDP2"); 126 break; 127 case GAM_DEPTH_GDP3_ID: 128 seq_puts(s, "GDP3"); 129 break; 130 default: 131 seq_puts(s, "---"); 132 } 133 134 if (i < GAM_MIXER_NB_DEPTH_LEVEL - 1) 135 seq_puts(s, " < "); 136 val = val >> 3; 137 } 138 } 139 140 static void mixer_dbg_mxn(struct seq_file *s, void *addr) 141 { 142 int i; 143 144 for (i = 1; i < 8; i++) 145 seq_printf(s, "-0x%08X", (int)readl(addr + i * 4)); 146 } 147 148 static int mixer_dbg_show(struct seq_file *s, void *arg) 149 { 150 struct drm_info_node *node = s->private; 151 struct sti_mixer *mixer = (struct sti_mixer *)node->info_ent->data; 152 153 seq_printf(s, "%s: (vaddr = 0x%p)", 154 sti_mixer_to_str(mixer), mixer->regs); 155 156 DBGFS_DUMP(GAM_MIXER_CTL); 157 mixer_dbg_ctl(s, sti_mixer_reg_read(mixer, GAM_MIXER_CTL)); 158 DBGFS_DUMP(GAM_MIXER_BKC); 159 DBGFS_DUMP(GAM_MIXER_BCO); 160 DBGFS_DUMP(GAM_MIXER_BCS); 161 DBGFS_DUMP(GAM_MIXER_AVO); 162 DBGFS_DUMP(GAM_MIXER_AVS); 163 DBGFS_DUMP(GAM_MIXER_CRB); 164 mixer_dbg_crb(s, sti_mixer_reg_read(mixer, GAM_MIXER_CRB)); 165 DBGFS_DUMP(GAM_MIXER_ACT); 166 DBGFS_DUMP(GAM_MIXER_MBP); 167 DBGFS_DUMP(GAM_MIXER_MX0); 168 mixer_dbg_mxn(s, mixer->regs + GAM_MIXER_MX0); 169 seq_putc(s, '\n'); 170 return 0; 171 } 172 173 static struct drm_info_list mixer0_debugfs_files[] = { 174 { "mixer_main", mixer_dbg_show, 0, NULL }, 175 }; 176 177 static struct drm_info_list mixer1_debugfs_files[] = { 178 { "mixer_aux", mixer_dbg_show, 0, NULL }, 179 }; 180 181 int sti_mixer_debugfs_init(struct sti_mixer *mixer, struct drm_minor *minor) 182 { 183 unsigned int i; 184 struct drm_info_list *mixer_debugfs_files; 185 int nb_files; 186 187 switch (mixer->id) { 188 case STI_MIXER_MAIN: 189 mixer_debugfs_files = mixer0_debugfs_files; 190 nb_files = ARRAY_SIZE(mixer0_debugfs_files); 191 break; 192 case STI_MIXER_AUX: 193 mixer_debugfs_files = mixer1_debugfs_files; 194 nb_files = ARRAY_SIZE(mixer1_debugfs_files); 195 break; 196 default: 197 return -EINVAL; 198 } 199 200 for (i = 0; i < nb_files; i++) 201 mixer_debugfs_files[i].data = mixer; 202 203 return drm_debugfs_create_files(mixer_debugfs_files, 204 nb_files, 205 minor->debugfs_root, minor); 206 } 207 208 void sti_mixer_set_background_status(struct sti_mixer *mixer, bool enable) 209 { 210 u32 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL); 211 212 val &= ~GAM_CTL_BACK_MASK; 213 val |= enable; 214 sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val); 215 } 216 217 static void sti_mixer_set_background_color(struct sti_mixer *mixer, 218 unsigned int rgb) 219 { 220 sti_mixer_reg_write(mixer, GAM_MIXER_BKC, rgb); 221 } 222 223 static void sti_mixer_set_background_area(struct sti_mixer *mixer, 224 struct drm_display_mode *mode) 225 { 226 u32 ydo, xdo, yds, xds; 227 228 ydo = sti_vtg_get_line_number(*mode, 0); 229 yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); 230 xdo = sti_vtg_get_pixel_number(*mode, 0); 231 xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); 232 233 sti_mixer_reg_write(mixer, GAM_MIXER_BCO, ydo << 16 | xdo); 234 sti_mixer_reg_write(mixer, GAM_MIXER_BCS, yds << 16 | xds); 235 } 236 237 int sti_mixer_set_plane_depth(struct sti_mixer *mixer, struct sti_plane *plane) 238 { 239 int plane_id, depth = plane->drm_plane.state->normalized_zpos; 240 unsigned int i; 241 u32 mask, val; 242 243 switch (plane->desc) { 244 case STI_GDP_0: 245 plane_id = GAM_DEPTH_GDP0_ID; 246 break; 247 case STI_GDP_1: 248 plane_id = GAM_DEPTH_GDP1_ID; 249 break; 250 case STI_GDP_2: 251 plane_id = GAM_DEPTH_GDP2_ID; 252 break; 253 case STI_GDP_3: 254 plane_id = GAM_DEPTH_GDP3_ID; 255 break; 256 case STI_HQVDP_0: 257 plane_id = GAM_DEPTH_VID0_ID; 258 break; 259 case STI_CURSOR: 260 /* no need to set depth for cursor */ 261 return 0; 262 default: 263 DRM_ERROR("Unknown plane %d\n", plane->desc); 264 return 1; 265 } 266 267 /* Search if a previous depth was already assigned to the plane */ 268 val = sti_mixer_reg_read(mixer, GAM_MIXER_CRB); 269 for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) { 270 mask = GAM_DEPTH_MASK_ID << (3 * i); 271 if ((val & mask) == plane_id << (3 * i)) 272 break; 273 } 274 275 mask |= GAM_DEPTH_MASK_ID << (3 * depth); 276 plane_id = plane_id << (3 * depth); 277 278 DRM_DEBUG_DRIVER("%s %s depth=%d\n", sti_mixer_to_str(mixer), 279 sti_plane_to_str(plane), depth); 280 dev_dbg(mixer->dev, "GAM_MIXER_CRB val 0x%x mask 0x%x\n", 281 plane_id, mask); 282 283 val &= ~mask; 284 val |= plane_id; 285 sti_mixer_reg_write(mixer, GAM_MIXER_CRB, val); 286 287 dev_dbg(mixer->dev, "Read GAM_MIXER_CRB 0x%x\n", 288 sti_mixer_reg_read(mixer, GAM_MIXER_CRB)); 289 return 0; 290 } 291 292 int sti_mixer_active_video_area(struct sti_mixer *mixer, 293 struct drm_display_mode *mode) 294 { 295 u32 ydo, xdo, yds, xds; 296 297 ydo = sti_vtg_get_line_number(*mode, 0); 298 yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); 299 xdo = sti_vtg_get_pixel_number(*mode, 0); 300 xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); 301 302 DRM_DEBUG_DRIVER("%s active video area xdo:%d ydo:%d xds:%d yds:%d\n", 303 sti_mixer_to_str(mixer), xdo, ydo, xds, yds); 304 sti_mixer_reg_write(mixer, GAM_MIXER_AVO, ydo << 16 | xdo); 305 sti_mixer_reg_write(mixer, GAM_MIXER_AVS, yds << 16 | xds); 306 307 sti_mixer_set_background_color(mixer, bkg_color); 308 309 sti_mixer_set_background_area(mixer, mode); 310 sti_mixer_set_background_status(mixer, true); 311 return 0; 312 } 313 314 static u32 sti_mixer_get_plane_mask(struct sti_plane *plane) 315 { 316 switch (plane->desc) { 317 case STI_BACK: 318 return GAM_CTL_BACK_MASK; 319 case STI_GDP_0: 320 return GAM_CTL_GDP0_MASK; 321 case STI_GDP_1: 322 return GAM_CTL_GDP1_MASK; 323 case STI_GDP_2: 324 return GAM_CTL_GDP2_MASK; 325 case STI_GDP_3: 326 return GAM_CTL_GDP3_MASK; 327 case STI_HQVDP_0: 328 return GAM_CTL_VID0_MASK; 329 case STI_CURSOR: 330 return GAM_CTL_CURSOR_MASK; 331 default: 332 return 0; 333 } 334 } 335 336 int sti_mixer_set_plane_status(struct sti_mixer *mixer, 337 struct sti_plane *plane, bool status) 338 { 339 u32 mask, val; 340 341 DRM_DEBUG_DRIVER("%s %s %s\n", status ? "enable" : "disable", 342 sti_mixer_to_str(mixer), sti_plane_to_str(plane)); 343 344 mask = sti_mixer_get_plane_mask(plane); 345 if (!mask) { 346 DRM_ERROR("Can't find layer mask\n"); 347 return -EINVAL; 348 } 349 350 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL); 351 val &= ~mask; 352 val |= status ? mask : 0; 353 sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val); 354 355 return 0; 356 } 357 358 struct sti_mixer *sti_mixer_create(struct device *dev, 359 struct drm_device *drm_dev, 360 int id, 361 void __iomem *baseaddr) 362 { 363 struct sti_mixer *mixer = devm_kzalloc(dev, sizeof(*mixer), GFP_KERNEL); 364 365 dev_dbg(dev, "%s\n", __func__); 366 if (!mixer) { 367 DRM_ERROR("Failed to allocated memory for mixer\n"); 368 return NULL; 369 } 370 mixer->regs = baseaddr; 371 mixer->dev = dev; 372 mixer->id = id; 373 374 DRM_DEBUG_DRIVER("%s created. Regs=%p\n", 375 sti_mixer_to_str(mixer), mixer->regs); 376 377 return mixer; 378 } 379