1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (c) 2015 Google, Inc 4 * Copyright 2014 Rockchip Inc. 5 */ 6 7 #include <common.h> 8 #include <clk.h> 9 #include <display.h> 10 #include <dm.h> 11 #include <edid.h> 12 #include <regmap.h> 13 #include <syscon.h> 14 #include <video.h> 15 #include <asm/gpio.h> 16 #include <asm/hardware.h> 17 #include <asm/io.h> 18 #include <asm/arch/clock.h> 19 #include <asm/arch/edp_rk3288.h> 20 #include <asm/arch/vop_rk3288.h> 21 #include <dm/device-internal.h> 22 #include <dm/uclass-internal.h> 23 #include <power/regulator.h> 24 #include "rk_vop.h" 25 26 DECLARE_GLOBAL_DATA_PTR; 27 28 enum vop_pol { 29 HSYNC_POSITIVE = 0, 30 VSYNC_POSITIVE = 1, 31 DEN_NEGATIVE = 2, 32 DCLK_INVERT = 3 33 }; 34 35 static void rkvop_enable(struct rk3288_vop *regs, ulong fbbase, 36 int fb_bits_per_pixel, 37 const struct display_timing *edid) 38 { 39 u32 lb_mode; 40 u32 rgb_mode; 41 u32 hactive = edid->hactive.typ; 42 u32 vactive = edid->vactive.typ; 43 44 writel(V_ACT_WIDTH(hactive - 1) | V_ACT_HEIGHT(vactive - 1), 45 ®s->win0_act_info); 46 47 writel(V_DSP_XST(edid->hsync_len.typ + edid->hback_porch.typ) | 48 V_DSP_YST(edid->vsync_len.typ + edid->vback_porch.typ), 49 ®s->win0_dsp_st); 50 51 writel(V_DSP_WIDTH(hactive - 1) | 52 V_DSP_HEIGHT(vactive - 1), 53 ®s->win0_dsp_info); 54 55 clrsetbits_le32(®s->win0_color_key, M_WIN0_KEY_EN | M_WIN0_KEY_COLOR, 56 V_WIN0_KEY_EN(0) | V_WIN0_KEY_COLOR(0)); 57 58 switch (fb_bits_per_pixel) { 59 case 16: 60 rgb_mode = RGB565; 61 writel(V_RGB565_VIRWIDTH(hactive), ®s->win0_vir); 62 break; 63 case 24: 64 rgb_mode = RGB888; 65 writel(V_RGB888_VIRWIDTH(hactive), ®s->win0_vir); 66 break; 67 case 32: 68 default: 69 rgb_mode = ARGB8888; 70 writel(V_ARGB888_VIRWIDTH(hactive), ®s->win0_vir); 71 break; 72 } 73 74 if (hactive > 2560) 75 lb_mode = LB_RGB_3840X2; 76 else if (hactive > 1920) 77 lb_mode = LB_RGB_2560X4; 78 else if (hactive > 1280) 79 lb_mode = LB_RGB_1920X5; 80 else 81 lb_mode = LB_RGB_1280X8; 82 83 clrsetbits_le32(®s->win0_ctrl0, 84 M_WIN0_LB_MODE | M_WIN0_DATA_FMT | M_WIN0_EN, 85 V_WIN0_LB_MODE(lb_mode) | V_WIN0_DATA_FMT(rgb_mode) | 86 V_WIN0_EN(1)); 87 88 writel(fbbase, ®s->win0_yrgb_mst); 89 writel(0x01, ®s->reg_cfg_done); /* enable reg config */ 90 } 91 92 static void rkvop_set_pin_polarity(struct udevice *dev, 93 enum vop_modes mode, u32 polarity) 94 { 95 struct rkvop_driverdata *ops = 96 (struct rkvop_driverdata *)dev_get_driver_data(dev); 97 98 if (ops->set_pin_polarity) 99 ops->set_pin_polarity(dev, mode, polarity); 100 } 101 102 static void rkvop_enable_output(struct udevice *dev, enum vop_modes mode) 103 { 104 struct rk_vop_priv *priv = dev_get_priv(dev); 105 struct rk3288_vop *regs = priv->regs; 106 107 /* remove from standby */ 108 clrbits_le32(®s->sys_ctrl, V_STANDBY_EN(1)); 109 110 switch (mode) { 111 case VOP_MODE_HDMI: 112 clrsetbits_le32(®s->sys_ctrl, M_ALL_OUT_EN, 113 V_HDMI_OUT_EN(1)); 114 break; 115 116 case VOP_MODE_EDP: 117 clrsetbits_le32(®s->sys_ctrl, M_ALL_OUT_EN, 118 V_EDP_OUT_EN(1)); 119 break; 120 121 case VOP_MODE_LVDS: 122 clrsetbits_le32(®s->sys_ctrl, M_ALL_OUT_EN, 123 V_RGB_OUT_EN(1)); 124 break; 125 126 case VOP_MODE_MIPI: 127 clrsetbits_le32(®s->sys_ctrl, M_ALL_OUT_EN, 128 V_MIPI_OUT_EN(1)); 129 break; 130 131 default: 132 debug("%s: unsupported output mode %x\n", __func__, mode); 133 } 134 } 135 136 static void rkvop_mode_set(struct udevice *dev, 137 const struct display_timing *edid, 138 enum vop_modes mode) 139 { 140 struct rk_vop_priv *priv = dev_get_priv(dev); 141 struct rk3288_vop *regs = priv->regs; 142 struct rkvop_driverdata *data = 143 (struct rkvop_driverdata *)dev_get_driver_data(dev); 144 145 u32 hactive = edid->hactive.typ; 146 u32 vactive = edid->vactive.typ; 147 u32 hsync_len = edid->hsync_len.typ; 148 u32 hback_porch = edid->hback_porch.typ; 149 u32 vsync_len = edid->vsync_len.typ; 150 u32 vback_porch = edid->vback_porch.typ; 151 u32 hfront_porch = edid->hfront_porch.typ; 152 u32 vfront_porch = edid->vfront_porch.typ; 153 int mode_flags; 154 u32 pin_polarity; 155 156 pin_polarity = BIT(DCLK_INVERT); 157 if (edid->flags & DISPLAY_FLAGS_HSYNC_HIGH) 158 pin_polarity |= BIT(HSYNC_POSITIVE); 159 if (edid->flags & DISPLAY_FLAGS_VSYNC_HIGH) 160 pin_polarity |= BIT(VSYNC_POSITIVE); 161 162 rkvop_set_pin_polarity(dev, mode, pin_polarity); 163 rkvop_enable_output(dev, mode); 164 165 mode_flags = 0; /* RGB888 */ 166 if ((data->features & VOP_FEATURE_OUTPUT_10BIT) && 167 (mode == VOP_MODE_HDMI || mode == VOP_MODE_EDP)) 168 mode_flags = 15; /* RGBaaa */ 169 170 clrsetbits_le32(®s->dsp_ctrl0, M_DSP_OUT_MODE, 171 V_DSP_OUT_MODE(mode_flags)); 172 173 writel(V_HSYNC(hsync_len) | 174 V_HORPRD(hsync_len + hback_porch + hactive + hfront_porch), 175 ®s->dsp_htotal_hs_end); 176 177 writel(V_HEAP(hsync_len + hback_porch + hactive) | 178 V_HASP(hsync_len + hback_porch), 179 ®s->dsp_hact_st_end); 180 181 writel(V_VSYNC(vsync_len) | 182 V_VERPRD(vsync_len + vback_porch + vactive + vfront_porch), 183 ®s->dsp_vtotal_vs_end); 184 185 writel(V_VAEP(vsync_len + vback_porch + vactive)| 186 V_VASP(vsync_len + vback_porch), 187 ®s->dsp_vact_st_end); 188 189 writel(V_HEAP(hsync_len + hback_porch + hactive) | 190 V_HASP(hsync_len + hback_porch), 191 ®s->post_dsp_hact_info); 192 193 writel(V_VAEP(vsync_len + vback_porch + vactive)| 194 V_VASP(vsync_len + vback_porch), 195 ®s->post_dsp_vact_info); 196 197 writel(0x01, ®s->reg_cfg_done); /* enable reg config */ 198 } 199 200 /** 201 * rk_display_init() - Try to enable the given display device 202 * 203 * This function performs many steps: 204 * - Finds the display device being referenced by @ep_node 205 * - Puts the VOP's ID into its uclass platform data 206 * - Probes the device to set it up 207 * - Reads the EDID timing information 208 * - Sets up the VOP clocks, etc. for the selected pixel clock and display mode 209 * - Enables the display (the display device handles this and will do different 210 * things depending on the display type) 211 * - Tells the uclass about the display resolution so that the console will 212 * appear correctly 213 * 214 * @dev: VOP device that we want to connect to the display 215 * @fbbase: Frame buffer address 216 * @ep_node: Device tree node to process - this is the offset of an endpoint 217 * node within the VOP's 'port' list. 218 * @return 0 if OK, -ve if something went wrong 219 */ 220 static int rk_display_init(struct udevice *dev, ulong fbbase, ofnode ep_node) 221 { 222 struct video_priv *uc_priv = dev_get_uclass_priv(dev); 223 struct rk_vop_priv *priv = dev_get_priv(dev); 224 int vop_id, remote_vop_id; 225 struct rk3288_vop *regs = priv->regs; 226 struct display_timing timing; 227 struct udevice *disp; 228 int ret; 229 u32 remote_phandle; 230 struct display_plat *disp_uc_plat; 231 struct clk clk; 232 enum video_log2_bpp l2bpp; 233 ofnode remote; 234 235 debug("%s(%s, %lu, %s)\n", __func__, 236 dev_read_name(dev), fbbase, ofnode_get_name(ep_node)); 237 238 vop_id = ofnode_read_s32_default(ep_node, "reg", -1); 239 debug("vop_id=%d\n", vop_id); 240 ret = ofnode_read_u32(ep_node, "remote-endpoint", &remote_phandle); 241 if (ret) 242 return ret; 243 244 remote = ofnode_get_by_phandle(remote_phandle); 245 if (!ofnode_valid(remote)) 246 return -EINVAL; 247 remote_vop_id = ofnode_read_u32_default(remote, "reg", -1); 248 debug("remote vop_id=%d\n", remote_vop_id); 249 250 /* 251 * The remote-endpoint references into a subnode of the encoder 252 * (i.e. HDMI, MIPI, etc.) with the DTS looking something like 253 * the following (assume 'hdmi_in_vopl' to be referenced): 254 * 255 * hdmi: hdmi@ff940000 { 256 * ports { 257 * hdmi_in: port { 258 * hdmi_in_vopb: endpoint@0 { ... }; 259 * hdmi_in_vopl: endpoint@1 { ... }; 260 * } 261 * } 262 * } 263 * 264 * The original code had 3 steps of "walking the parent", but 265 * a much better (as in: less likely to break if the DTS 266 * changes) way of doing this is to "find the enclosing device 267 * of UCLASS_DISPLAY". 268 */ 269 while (ofnode_valid(remote)) { 270 remote = ofnode_get_parent(remote); 271 if (!ofnode_valid(remote)) { 272 debug("%s(%s): no UCLASS_DISPLAY for remote-endpoint\n", 273 __func__, dev_read_name(dev)); 274 return -EINVAL; 275 } 276 277 uclass_find_device_by_ofnode(UCLASS_DISPLAY, remote, &disp); 278 if (disp) 279 break; 280 }; 281 282 disp_uc_plat = dev_get_uclass_platdata(disp); 283 debug("Found device '%s', disp_uc_priv=%p\n", disp->name, disp_uc_plat); 284 if (display_in_use(disp)) { 285 debug(" - device in use\n"); 286 return -EBUSY; 287 } 288 289 disp_uc_plat->source_id = remote_vop_id; 290 disp_uc_plat->src_dev = dev; 291 292 ret = device_probe(disp); 293 if (ret) { 294 debug("%s: device '%s' display won't probe (ret=%d)\n", 295 __func__, dev->name, ret); 296 return ret; 297 } 298 299 ret = display_read_timing(disp, &timing); 300 if (ret) { 301 debug("%s: Failed to read timings\n", __func__); 302 return ret; 303 } 304 305 ret = clk_get_by_index(dev, 1, &clk); 306 if (!ret) 307 ret = clk_set_rate(&clk, timing.pixelclock.typ); 308 if (IS_ERR_VALUE(ret)) { 309 debug("%s: Failed to set pixel clock: ret=%d\n", __func__, ret); 310 return ret; 311 } 312 313 /* Set bitwidth for vop display according to vop mode */ 314 switch (vop_id) { 315 case VOP_MODE_EDP: 316 case VOP_MODE_LVDS: 317 l2bpp = VIDEO_BPP16; 318 break; 319 case VOP_MODE_HDMI: 320 case VOP_MODE_MIPI: 321 l2bpp = VIDEO_BPP32; 322 break; 323 default: 324 l2bpp = VIDEO_BPP16; 325 } 326 327 rkvop_mode_set(dev, &timing, vop_id); 328 rkvop_enable(regs, fbbase, 1 << l2bpp, &timing); 329 330 ret = display_enable(disp, 1 << l2bpp, &timing); 331 if (ret) 332 return ret; 333 334 uc_priv->xsize = timing.hactive.typ; 335 uc_priv->ysize = timing.vactive.typ; 336 uc_priv->bpix = l2bpp; 337 debug("fb=%lx, size=%d %d\n", fbbase, uc_priv->xsize, uc_priv->ysize); 338 339 return 0; 340 } 341 342 void rk_vop_probe_regulators(struct udevice *dev, 343 const char * const *names, int cnt) 344 { 345 int i, ret; 346 const char *name; 347 struct udevice *reg; 348 349 for (i = 0; i < cnt; ++i) { 350 name = names[i]; 351 debug("%s: probing regulator '%s'\n", dev->name, name); 352 353 ret = regulator_autoset_by_name(name, ®); 354 if (!ret) 355 ret = regulator_set_enable(reg, true); 356 } 357 } 358 359 int rk_vop_probe(struct udevice *dev) 360 { 361 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev); 362 struct rk_vop_priv *priv = dev_get_priv(dev); 363 int ret = 0; 364 ofnode port, node; 365 366 /* Before relocation we don't need to do anything */ 367 if (!(gd->flags & GD_FLG_RELOC)) 368 return 0; 369 370 priv->regs = (struct rk3288_vop *)dev_read_addr(dev); 371 372 /* 373 * Try all the ports until we find one that works. In practice this 374 * tries EDP first if available, then HDMI. 375 * 376 * Note that rockchip_vop_set_clk() always uses NPLL as the source 377 * clock so it is currently not possible to use more than one display 378 * device simultaneously. 379 */ 380 port = dev_read_subnode(dev, "port"); 381 if (!ofnode_valid(port)) { 382 debug("%s(%s): 'port' subnode not found\n", 383 __func__, dev_read_name(dev)); 384 return -EINVAL; 385 } 386 387 for (node = ofnode_first_subnode(port); 388 ofnode_valid(node); 389 node = dev_read_next_subnode(node)) { 390 ret = rk_display_init(dev, plat->base, node); 391 if (ret) 392 debug("Device failed: ret=%d\n", ret); 393 if (!ret) 394 break; 395 } 396 video_set_flush_dcache(dev, 1); 397 398 return ret; 399 } 400 401 int rk_vop_bind(struct udevice *dev) 402 { 403 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev); 404 405 plat->size = 4 * (CONFIG_VIDEO_ROCKCHIP_MAX_XRES * 406 CONFIG_VIDEO_ROCKCHIP_MAX_YRES); 407 408 return 0; 409 } 410