1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2015 MediaTek Inc. 4 */ 5 6 #include <linux/clk.h> 7 #include <linux/component.h> 8 #include <linux/module.h> 9 #include <linux/of_device.h> 10 #include <linux/of_irq.h> 11 #include <linux/platform_device.h> 12 #include <linux/soc/mediatek/mtk-cmdq.h> 13 14 #include "mtk_drm_crtc.h" 15 #include "mtk_drm_ddp_comp.h" 16 17 #define DISP_REG_RDMA_INT_ENABLE 0x0000 18 #define DISP_REG_RDMA_INT_STATUS 0x0004 19 #define RDMA_TARGET_LINE_INT BIT(5) 20 #define RDMA_FIFO_UNDERFLOW_INT BIT(4) 21 #define RDMA_EOF_ABNORMAL_INT BIT(3) 22 #define RDMA_FRAME_END_INT BIT(2) 23 #define RDMA_FRAME_START_INT BIT(1) 24 #define RDMA_REG_UPDATE_INT BIT(0) 25 #define DISP_REG_RDMA_GLOBAL_CON 0x0010 26 #define RDMA_ENGINE_EN BIT(0) 27 #define RDMA_MODE_MEMORY BIT(1) 28 #define DISP_REG_RDMA_SIZE_CON_0 0x0014 29 #define RDMA_MATRIX_ENABLE BIT(17) 30 #define RDMA_MATRIX_INT_MTX_SEL GENMASK(23, 20) 31 #define RDMA_MATRIX_INT_MTX_BT601_to_RGB (6 << 20) 32 #define DISP_REG_RDMA_SIZE_CON_1 0x0018 33 #define DISP_REG_RDMA_TARGET_LINE 0x001c 34 #define DISP_RDMA_MEM_CON 0x0024 35 #define MEM_MODE_INPUT_FORMAT_RGB565 (0x000 << 4) 36 #define MEM_MODE_INPUT_FORMAT_RGB888 (0x001 << 4) 37 #define MEM_MODE_INPUT_FORMAT_RGBA8888 (0x002 << 4) 38 #define MEM_MODE_INPUT_FORMAT_ARGB8888 (0x003 << 4) 39 #define MEM_MODE_INPUT_FORMAT_UYVY (0x004 << 4) 40 #define MEM_MODE_INPUT_FORMAT_YUYV (0x005 << 4) 41 #define MEM_MODE_INPUT_SWAP BIT(8) 42 #define DISP_RDMA_MEM_SRC_PITCH 0x002c 43 #define DISP_RDMA_MEM_GMC_SETTING_0 0x0030 44 #define DISP_REG_RDMA_FIFO_CON 0x0040 45 #define RDMA_FIFO_UNDERFLOW_EN BIT(31) 46 #define RDMA_FIFO_PSEUDO_SIZE(bytes) (((bytes) / 16) << 16) 47 #define RDMA_OUTPUT_VALID_FIFO_THRESHOLD(bytes) ((bytes) / 16) 48 #define RDMA_FIFO_SIZE(rdma) ((rdma)->data->fifo_size) 49 #define DISP_RDMA_MEM_START_ADDR 0x0f00 50 51 #define RDMA_MEM_GMC 0x40402020 52 53 struct mtk_disp_rdma_data { 54 unsigned int fifo_size; 55 }; 56 57 /** 58 * struct mtk_disp_rdma - DISP_RDMA driver structure 59 * @ddp_comp - structure containing type enum and hardware resources 60 * @crtc - associated crtc to report irq events to 61 */ 62 struct mtk_disp_rdma { 63 struct mtk_ddp_comp ddp_comp; 64 struct drm_crtc *crtc; 65 const struct mtk_disp_rdma_data *data; 66 }; 67 68 static inline struct mtk_disp_rdma *comp_to_rdma(struct mtk_ddp_comp *comp) 69 { 70 return container_of(comp, struct mtk_disp_rdma, ddp_comp); 71 } 72 73 static irqreturn_t mtk_disp_rdma_irq_handler(int irq, void *dev_id) 74 { 75 struct mtk_disp_rdma *priv = dev_id; 76 struct mtk_ddp_comp *rdma = &priv->ddp_comp; 77 78 /* Clear frame completion interrupt */ 79 writel(0x0, rdma->regs + DISP_REG_RDMA_INT_STATUS); 80 81 if (!priv->crtc) 82 return IRQ_NONE; 83 84 mtk_crtc_ddp_irq(priv->crtc, rdma); 85 86 return IRQ_HANDLED; 87 } 88 89 static void rdma_update_bits(struct mtk_ddp_comp *comp, unsigned int reg, 90 unsigned int mask, unsigned int val) 91 { 92 unsigned int tmp = readl(comp->regs + reg); 93 94 tmp = (tmp & ~mask) | (val & mask); 95 writel(tmp, comp->regs + reg); 96 } 97 98 static void mtk_rdma_enable_vblank(struct mtk_ddp_comp *comp, 99 struct drm_crtc *crtc) 100 { 101 struct mtk_disp_rdma *rdma = comp_to_rdma(comp); 102 103 rdma->crtc = crtc; 104 rdma_update_bits(comp, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT, 105 RDMA_FRAME_END_INT); 106 } 107 108 static void mtk_rdma_disable_vblank(struct mtk_ddp_comp *comp) 109 { 110 struct mtk_disp_rdma *rdma = comp_to_rdma(comp); 111 112 rdma->crtc = NULL; 113 rdma_update_bits(comp, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT, 0); 114 } 115 116 static void mtk_rdma_start(struct mtk_ddp_comp *comp) 117 { 118 rdma_update_bits(comp, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN, 119 RDMA_ENGINE_EN); 120 } 121 122 static void mtk_rdma_stop(struct mtk_ddp_comp *comp) 123 { 124 rdma_update_bits(comp, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN, 0); 125 } 126 127 static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width, 128 unsigned int height, unsigned int vrefresh, 129 unsigned int bpc, struct cmdq_pkt *cmdq_pkt) 130 { 131 unsigned int threshold; 132 unsigned int reg; 133 struct mtk_disp_rdma *rdma = comp_to_rdma(comp); 134 135 mtk_ddp_write_mask(cmdq_pkt, width, comp, 136 DISP_REG_RDMA_SIZE_CON_0, 0xfff); 137 mtk_ddp_write_mask(cmdq_pkt, height, comp, 138 DISP_REG_RDMA_SIZE_CON_1, 0xfffff); 139 140 /* 141 * Enable FIFO underflow since DSI and DPI can't be blocked. 142 * Keep the FIFO pseudo size reset default of 8 KiB. Set the 143 * output threshold to 6 microseconds with 7/6 overhead to 144 * account for blanking, and with a pixel depth of 4 bytes: 145 */ 146 threshold = width * height * vrefresh * 4 * 7 / 1000000; 147 reg = RDMA_FIFO_UNDERFLOW_EN | 148 RDMA_FIFO_PSEUDO_SIZE(RDMA_FIFO_SIZE(rdma)) | 149 RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold); 150 mtk_ddp_write(cmdq_pkt, reg, comp, DISP_REG_RDMA_FIFO_CON); 151 } 152 153 static unsigned int rdma_fmt_convert(struct mtk_disp_rdma *rdma, 154 unsigned int fmt) 155 { 156 /* The return value in switch "MEM_MODE_INPUT_FORMAT_XXX" 157 * is defined in mediatek HW data sheet. 158 * The alphabet order in XXX is no relation to data 159 * arrangement in memory. 160 */ 161 switch (fmt) { 162 default: 163 case DRM_FORMAT_RGB565: 164 return MEM_MODE_INPUT_FORMAT_RGB565; 165 case DRM_FORMAT_BGR565: 166 return MEM_MODE_INPUT_FORMAT_RGB565 | MEM_MODE_INPUT_SWAP; 167 case DRM_FORMAT_RGB888: 168 return MEM_MODE_INPUT_FORMAT_RGB888; 169 case DRM_FORMAT_BGR888: 170 return MEM_MODE_INPUT_FORMAT_RGB888 | MEM_MODE_INPUT_SWAP; 171 case DRM_FORMAT_RGBX8888: 172 case DRM_FORMAT_RGBA8888: 173 return MEM_MODE_INPUT_FORMAT_ARGB8888; 174 case DRM_FORMAT_BGRX8888: 175 case DRM_FORMAT_BGRA8888: 176 return MEM_MODE_INPUT_FORMAT_ARGB8888 | MEM_MODE_INPUT_SWAP; 177 case DRM_FORMAT_XRGB8888: 178 case DRM_FORMAT_ARGB8888: 179 return MEM_MODE_INPUT_FORMAT_RGBA8888; 180 case DRM_FORMAT_XBGR8888: 181 case DRM_FORMAT_ABGR8888: 182 return MEM_MODE_INPUT_FORMAT_RGBA8888 | MEM_MODE_INPUT_SWAP; 183 case DRM_FORMAT_UYVY: 184 return MEM_MODE_INPUT_FORMAT_UYVY; 185 case DRM_FORMAT_YUYV: 186 return MEM_MODE_INPUT_FORMAT_YUYV; 187 } 188 } 189 190 static unsigned int mtk_rdma_layer_nr(struct mtk_ddp_comp *comp) 191 { 192 return 1; 193 } 194 195 static void mtk_rdma_layer_config(struct mtk_ddp_comp *comp, unsigned int idx, 196 struct mtk_plane_state *state, 197 struct cmdq_pkt *cmdq_pkt) 198 { 199 struct mtk_disp_rdma *rdma = comp_to_rdma(comp); 200 struct mtk_plane_pending_state *pending = &state->pending; 201 unsigned int addr = pending->addr; 202 unsigned int pitch = pending->pitch & 0xffff; 203 unsigned int fmt = pending->format; 204 unsigned int con; 205 206 con = rdma_fmt_convert(rdma, fmt); 207 mtk_ddp_write_relaxed(cmdq_pkt, con, comp, DISP_RDMA_MEM_CON); 208 209 if (fmt == DRM_FORMAT_UYVY || fmt == DRM_FORMAT_YUYV) { 210 mtk_ddp_write_mask(cmdq_pkt, RDMA_MATRIX_ENABLE, comp, 211 DISP_REG_RDMA_SIZE_CON_0, 212 RDMA_MATRIX_ENABLE); 213 mtk_ddp_write_mask(cmdq_pkt, RDMA_MATRIX_INT_MTX_BT601_to_RGB, 214 comp, DISP_REG_RDMA_SIZE_CON_0, 215 RDMA_MATRIX_INT_MTX_SEL); 216 } else { 217 mtk_ddp_write_mask(cmdq_pkt, 0, comp, 218 DISP_REG_RDMA_SIZE_CON_0, 219 RDMA_MATRIX_ENABLE); 220 } 221 mtk_ddp_write_relaxed(cmdq_pkt, addr, comp, DISP_RDMA_MEM_START_ADDR); 222 mtk_ddp_write_relaxed(cmdq_pkt, pitch, comp, DISP_RDMA_MEM_SRC_PITCH); 223 mtk_ddp_write(cmdq_pkt, RDMA_MEM_GMC, comp, 224 DISP_RDMA_MEM_GMC_SETTING_0); 225 mtk_ddp_write_mask(cmdq_pkt, RDMA_MODE_MEMORY, comp, 226 DISP_REG_RDMA_GLOBAL_CON, RDMA_MODE_MEMORY); 227 228 } 229 230 static const struct mtk_ddp_comp_funcs mtk_disp_rdma_funcs = { 231 .config = mtk_rdma_config, 232 .start = mtk_rdma_start, 233 .stop = mtk_rdma_stop, 234 .enable_vblank = mtk_rdma_enable_vblank, 235 .disable_vblank = mtk_rdma_disable_vblank, 236 .layer_nr = mtk_rdma_layer_nr, 237 .layer_config = mtk_rdma_layer_config, 238 }; 239 240 static int mtk_disp_rdma_bind(struct device *dev, struct device *master, 241 void *data) 242 { 243 struct mtk_disp_rdma *priv = dev_get_drvdata(dev); 244 struct drm_device *drm_dev = data; 245 int ret; 246 247 ret = mtk_ddp_comp_register(drm_dev, &priv->ddp_comp); 248 if (ret < 0) { 249 dev_err(dev, "Failed to register component %pOF: %d\n", 250 dev->of_node, ret); 251 return ret; 252 } 253 254 return 0; 255 256 } 257 258 static void mtk_disp_rdma_unbind(struct device *dev, struct device *master, 259 void *data) 260 { 261 struct mtk_disp_rdma *priv = dev_get_drvdata(dev); 262 struct drm_device *drm_dev = data; 263 264 mtk_ddp_comp_unregister(drm_dev, &priv->ddp_comp); 265 } 266 267 static const struct component_ops mtk_disp_rdma_component_ops = { 268 .bind = mtk_disp_rdma_bind, 269 .unbind = mtk_disp_rdma_unbind, 270 }; 271 272 static int mtk_disp_rdma_probe(struct platform_device *pdev) 273 { 274 struct device *dev = &pdev->dev; 275 struct mtk_disp_rdma *priv; 276 int comp_id; 277 int irq; 278 int ret; 279 280 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 281 if (!priv) 282 return -ENOMEM; 283 284 irq = platform_get_irq(pdev, 0); 285 if (irq < 0) 286 return irq; 287 288 comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_RDMA); 289 if (comp_id < 0) { 290 dev_err(dev, "Failed to identify by alias: %d\n", comp_id); 291 return comp_id; 292 } 293 294 ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id, 295 &mtk_disp_rdma_funcs); 296 if (ret) { 297 if (ret != -EPROBE_DEFER) 298 dev_err(dev, "Failed to initialize component: %d\n", 299 ret); 300 301 return ret; 302 } 303 304 /* Disable and clear pending interrupts */ 305 writel(0x0, priv->ddp_comp.regs + DISP_REG_RDMA_INT_ENABLE); 306 writel(0x0, priv->ddp_comp.regs + DISP_REG_RDMA_INT_STATUS); 307 308 ret = devm_request_irq(dev, irq, mtk_disp_rdma_irq_handler, 309 IRQF_TRIGGER_NONE, dev_name(dev), priv); 310 if (ret < 0) { 311 dev_err(dev, "Failed to request irq %d: %d\n", irq, ret); 312 return ret; 313 } 314 315 priv->data = of_device_get_match_data(dev); 316 317 platform_set_drvdata(pdev, priv); 318 319 ret = component_add(dev, &mtk_disp_rdma_component_ops); 320 if (ret) 321 dev_err(dev, "Failed to add component: %d\n", ret); 322 323 return ret; 324 } 325 326 static int mtk_disp_rdma_remove(struct platform_device *pdev) 327 { 328 component_del(&pdev->dev, &mtk_disp_rdma_component_ops); 329 330 return 0; 331 } 332 333 static const struct mtk_disp_rdma_data mt2701_rdma_driver_data = { 334 .fifo_size = SZ_4K, 335 }; 336 337 static const struct mtk_disp_rdma_data mt8173_rdma_driver_data = { 338 .fifo_size = SZ_8K, 339 }; 340 341 static const struct of_device_id mtk_disp_rdma_driver_dt_match[] = { 342 { .compatible = "mediatek,mt2701-disp-rdma", 343 .data = &mt2701_rdma_driver_data}, 344 { .compatible = "mediatek,mt8173-disp-rdma", 345 .data = &mt8173_rdma_driver_data}, 346 {}, 347 }; 348 MODULE_DEVICE_TABLE(of, mtk_disp_rdma_driver_dt_match); 349 350 struct platform_driver mtk_disp_rdma_driver = { 351 .probe = mtk_disp_rdma_probe, 352 .remove = mtk_disp_rdma_remove, 353 .driver = { 354 .name = "mediatek-disp-rdma", 355 .owner = THIS_MODULE, 356 .of_match_table = mtk_disp_rdma_driver_dt_match, 357 }, 358 }; 359