drivers/gpu/drm/mediatek/mtk_disp_ovl.c

   1 /*
   2  * Copyright (c) 2015 MediaTek Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <drm/drmP.h>
  15 #include <linux/clk.h>
  16 #include <linux/component.h>
  17 #include <linux/of_device.h>
  18 #include <linux/of_irq.h>
  19 #include <linux/platform_device.h>
  20
  21 #include "mtk_drm_crtc.h"
  22 #include "mtk_drm_ddp_comp.h"
  23
  24 #define DISP_REG_OVL_INTEN                      0x0004
  25 #define OVL_FME_CPL_INT                                 BIT(1)
  26 #define DISP_REG_OVL_INTSTA                     0x0008
  27 #define DISP_REG_OVL_EN                         0x000c
  28 #define DISP_REG_OVL_RST                        0x0014
  29 #define DISP_REG_OVL_ROI_SIZE                   0x0020
  30 #define DISP_REG_OVL_ROI_BGCLR                  0x0028
  31 #define DISP_REG_OVL_SRC_CON                    0x002c
  32 #define DISP_REG_OVL_CON(n)                     (0x0030 + 0x20 * (n))
  33 #define DISP_REG_OVL_SRC_SIZE(n)                (0x0038 + 0x20 * (n))
  34 #define DISP_REG_OVL_OFFSET(n)                  (0x003c + 0x20 * (n))
  35 #define DISP_REG_OVL_PITCH(n)                   (0x0044 + 0x20 * (n))
  36 #define DISP_REG_OVL_RDMA_CTRL(n)               (0x00c0 + 0x20 * (n))
  37 #define DISP_REG_OVL_RDMA_GMC(n)                (0x00c8 + 0x20 * (n))
  38 #define DISP_REG_OVL_ADDR_MT2701                0x0040
  39 #define DISP_REG_OVL_ADDR_MT8173                0x0f40
  40 #define DISP_REG_OVL_ADDR(ovl, n)               ((ovl)->data->addr + 0x20 * (n))
  41
  42 #define OVL_RDMA_MEM_GMC        0x40402020
  43
  44 #define OVL_CON_BYTE_SWAP       BIT(24)
  45 #define OVL_CON_MTX_YUV_TO_RGB  (6 << 16)
  46 #define OVL_CON_CLRFMT_RGB      (1 << 12)
  47 #define OVL_CON_CLRFMT_RGBA8888 (2 << 12)
  48 #define OVL_CON_CLRFMT_ARGB8888 (3 << 12)
  49 #define OVL_CON_CLRFMT_UYVY     (4 << 12)
  50 #define OVL_CON_CLRFMT_YUYV     (5 << 12)
  51 #define OVL_CON_CLRFMT_RGB565(ovl)      ((ovl)->data->fmt_rgb565_is_0 ? \
  52                                         0 : OVL_CON_CLRFMT_RGB)
  53 #define OVL_CON_CLRFMT_RGB888(ovl)      ((ovl)->data->fmt_rgb565_is_0 ? \
  54                                         OVL_CON_CLRFMT_RGB : 0)
  55 #define OVL_CON_AEN             BIT(8)
  56 #define OVL_CON_ALPHA           0xff
  57
  58 struct mtk_disp_ovl_data {
  59         unsigned int addr;
  60         bool fmt_rgb565_is_0;
  61 };
  62
  63 /**
  64  * struct mtk_disp_ovl - DISP_OVL driver structure
  65  * @ddp_comp - structure containing type enum and hardware resources
  66  * @crtc - associated crtc to report vblank events to
  67  */
  68 struct mtk_disp_ovl {
  69         struct mtk_ddp_comp             ddp_comp;
  70         struct drm_crtc                 *crtc;
  71         const struct mtk_disp_ovl_data  *data;
  72 };
  73
  74 static inline struct mtk_disp_ovl *comp_to_ovl(struct mtk_ddp_comp *comp)
  75 {
  76         return container_of(comp, struct mtk_disp_ovl, ddp_comp);
  77 }
  78
  79 static irqreturn_t mtk_disp_ovl_irq_handler(int irq, void *dev_id)
  80 {
  81         struct mtk_disp_ovl *priv = dev_id;
  82         struct mtk_ddp_comp *ovl = &priv->ddp_comp;
  83
  84         /* Clear frame completion interrupt */
  85         writel(0x0, ovl->regs + DISP_REG_OVL_INTSTA);
  86
  87         if (!priv->crtc)
  88                 return IRQ_NONE;
  89
  90         mtk_crtc_ddp_irq(priv->crtc, ovl);
  91
  92         return IRQ_HANDLED;
  93 }
  94
  95 static void mtk_ovl_enable_vblank(struct mtk_ddp_comp *comp,
  96                                   struct drm_crtc *crtc)
  97 {
  98         struct mtk_disp_ovl *ovl = comp_to_ovl(comp);
  99
 100         ovl->crtc = crtc;
 101         writel(0x0, comp->regs + DISP_REG_OVL_INTSTA);
 102         writel_relaxed(OVL_FME_CPL_INT, comp->regs + DISP_REG_OVL_INTEN);
 103 }
 104
 105 static void mtk_ovl_disable_vblank(struct mtk_ddp_comp *comp)
 106 {
 107         struct mtk_disp_ovl *ovl = comp_to_ovl(comp);
 108
 109         ovl->crtc = NULL;
 110         writel_relaxed(0x0, comp->regs + DISP_REG_OVL_INTEN);
 111 }
 112
 113 static void mtk_ovl_start(struct mtk_ddp_comp *comp)
 114 {
 115         writel_relaxed(0x1, comp->regs + DISP_REG_OVL_EN);
 116 }
 117
 118 static void mtk_ovl_stop(struct mtk_ddp_comp *comp)
 119 {
 120         writel_relaxed(0x0, comp->regs + DISP_REG_OVL_EN);
 121 }
 122
 123 static void mtk_ovl_config(struct mtk_ddp_comp *comp, unsigned int w,
 124                            unsigned int h, unsigned int vrefresh,
 125                            unsigned int bpc)
 126 {
 127         if (w != 0 && h != 0)
 128                 writel_relaxed(h << 16 | w, comp->regs + DISP_REG_OVL_ROI_SIZE);
 129         writel_relaxed(0x0, comp->regs + DISP_REG_OVL_ROI_BGCLR);
 130
 131         writel(0x1, comp->regs + DISP_REG_OVL_RST);
 132         writel(0x0, comp->regs + DISP_REG_OVL_RST);
 133 }
 134
 135 static void mtk_ovl_layer_on(struct mtk_ddp_comp *comp, unsigned int idx)
 136 {
 137         unsigned int reg;
 138
 139         writel(0x1, comp->regs + DISP_REG_OVL_RDMA_CTRL(idx));
 140         writel(OVL_RDMA_MEM_GMC, comp->regs + DISP_REG_OVL_RDMA_GMC(idx));
 141
 142         reg = readl(comp->regs + DISP_REG_OVL_SRC_CON);
 143         reg = reg | BIT(idx);
 144         writel(reg, comp->regs + DISP_REG_OVL_SRC_CON);
 145 }
 146
 147 static void mtk_ovl_layer_off(struct mtk_ddp_comp *comp, unsigned int idx)
 148 {
 149         unsigned int reg;
 150
 151         reg = readl(comp->regs + DISP_REG_OVL_SRC_CON);
 152         reg = reg & ~BIT(idx);
 153         writel(reg, comp->regs + DISP_REG_OVL_SRC_CON);
 154
 155         writel(0x0, comp->regs + DISP_REG_OVL_RDMA_CTRL(idx));
 156 }
 157
 158 static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl, unsigned int fmt)
 159 {
 160         switch (fmt) {
 161         default:
 162         case DRM_FORMAT_RGB565:
 163                 return OVL_CON_CLRFMT_RGB565(ovl);
 164         case DRM_FORMAT_BGR565:
 165                 return OVL_CON_CLRFMT_RGB565(ovl) | OVL_CON_BYTE_SWAP;
 166         case DRM_FORMAT_RGB888:
 167                 return OVL_CON_CLRFMT_RGB888(ovl);
 168         case DRM_FORMAT_BGR888:
 169                 return OVL_CON_CLRFMT_RGB888(ovl) | OVL_CON_BYTE_SWAP;
 170         case DRM_FORMAT_RGBX8888:
 171         case DRM_FORMAT_RGBA8888:
 172                 return OVL_CON_CLRFMT_ARGB8888;
 173         case DRM_FORMAT_BGRX8888:
 174         case DRM_FORMAT_BGRA8888:
 175                 return OVL_CON_CLRFMT_ARGB8888 | OVL_CON_BYTE_SWAP;
 176         case DRM_FORMAT_XRGB8888:
 177         case DRM_FORMAT_ARGB8888:
 178                 return OVL_CON_CLRFMT_RGBA8888;
 179         case DRM_FORMAT_XBGR8888:
 180         case DRM_FORMAT_ABGR8888:
 181                 return OVL_CON_CLRFMT_RGBA8888 | OVL_CON_BYTE_SWAP;
 182         case DRM_FORMAT_UYVY:
 183                 return OVL_CON_CLRFMT_UYVY | OVL_CON_MTX_YUV_TO_RGB;
 184         case DRM_FORMAT_YUYV:
 185                 return OVL_CON_CLRFMT_YUYV | OVL_CON_MTX_YUV_TO_RGB;
 186         }
 187 }
 188
 189 static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
 190                                  struct mtk_plane_state *state)
 191 {
 192         struct mtk_disp_ovl *ovl = comp_to_ovl(comp);
 193         struct mtk_plane_pending_state *pending = &state->pending;
 194         unsigned int addr = pending->addr;
 195         unsigned int pitch = pending->pitch & 0xffff;
 196         unsigned int fmt = pending->format;
 197         unsigned int offset = (pending->y << 16) | pending->x;
 198         unsigned int src_size = (pending->height << 16) | pending->width;
 199         unsigned int con;
 200
 201         if (!pending->enable)
 202                 mtk_ovl_layer_off(comp, idx);
 203
 204         con = ovl_fmt_convert(ovl, fmt);
 205         if (idx != 0)
 206                 con |= OVL_CON_AEN | OVL_CON_ALPHA;
 207
 208         writel_relaxed(con, comp->regs + DISP_REG_OVL_CON(idx));
 209         writel_relaxed(pitch, comp->regs + DISP_REG_OVL_PITCH(idx));
 210         writel_relaxed(src_size, comp->regs + DISP_REG_OVL_SRC_SIZE(idx));
 211         writel_relaxed(offset, comp->regs + DISP_REG_OVL_OFFSET(idx));
 212         writel_relaxed(addr, comp->regs + DISP_REG_OVL_ADDR(ovl, idx));
 213
 214         if (pending->enable)
 215                 mtk_ovl_layer_on(comp, idx);
 216 }
 217
 218 static const struct mtk_ddp_comp_funcs mtk_disp_ovl_funcs = {
 219         .config = mtk_ovl_config,
 220         .start = mtk_ovl_start,
 221         .stop = mtk_ovl_stop,
 222         .enable_vblank = mtk_ovl_enable_vblank,
 223         .disable_vblank = mtk_ovl_disable_vblank,
 224         .layer_on = mtk_ovl_layer_on,
 225         .layer_off = mtk_ovl_layer_off,
 226         .layer_config = mtk_ovl_layer_config,
 227 };
 228
 229 static int mtk_disp_ovl_bind(struct device *dev, struct device *master,
 230                              void *data)
 231 {
 232         struct mtk_disp_ovl *priv = dev_get_drvdata(dev);
 233         struct drm_device *drm_dev = data;
 234         int ret;
 235
 236         ret = mtk_ddp_comp_register(drm_dev, &priv->ddp_comp);
 237         if (ret < 0) {
 238                 dev_err(dev, "Failed to register component %s: %d\n",
 239                         dev->of_node->full_name, ret);
 240                 return ret;
 241         }
 242
 243         return 0;
 244 }
 245
 246 static void mtk_disp_ovl_unbind(struct device *dev, struct device *master,
 247                                 void *data)
 248 {
 249         struct mtk_disp_ovl *priv = dev_get_drvdata(dev);
 250         struct drm_device *drm_dev = data;
 251
 252         mtk_ddp_comp_unregister(drm_dev, &priv->ddp_comp);
 253 }
 254
 255 static const struct component_ops mtk_disp_ovl_component_ops = {
 256         .bind   = mtk_disp_ovl_bind,
 257         .unbind = mtk_disp_ovl_unbind,
 258 };
 259
 260 static int mtk_disp_ovl_probe(struct platform_device *pdev)
 261 {
 262         struct device *dev = &pdev->dev;
 263         struct mtk_disp_ovl *priv;
 264         int comp_id;
 265         int irq;
 266         int ret;
 267
 268         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 269         if (!priv)
 270                 return -ENOMEM;
 271
 272         irq = platform_get_irq(pdev, 0);
 273         if (irq < 0)
 274                 return irq;
 275
 276         comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_OVL);
 277         if (comp_id < 0) {
 278                 dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
 279                 return comp_id;
 280         }
 281
 282         ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
 283                                 &mtk_disp_ovl_funcs);
 284         if (ret) {
 285                 dev_err(dev, "Failed to initialize component: %d\n", ret);
 286                 return ret;
 287         }
 288
 289         priv->data = of_device_get_match_data(dev);
 290
 291         platform_set_drvdata(pdev, priv);
 292
 293         ret = devm_request_irq(dev, irq, mtk_disp_ovl_irq_handler,
 294                                IRQF_TRIGGER_NONE, dev_name(dev), priv);
 295         if (ret < 0) {
 296                 dev_err(dev, "Failed to request irq %d: %d\n", irq, ret);
 297                 return ret;
 298         }
 299
 300         ret = component_add(dev, &mtk_disp_ovl_component_ops);
 301         if (ret)
 302                 dev_err(dev, "Failed to add component: %d\n", ret);
 303
 304         return ret;
 305 }
 306
 307 static int mtk_disp_ovl_remove(struct platform_device *pdev)
 308 {
 309         component_del(&pdev->dev, &mtk_disp_ovl_component_ops);
 310
 311         return 0;
 312 }
 313
 314 static const struct mtk_disp_ovl_data mt2701_ovl_driver_data = {
 315         .addr = DISP_REG_OVL_ADDR_MT2701,
 316         .fmt_rgb565_is_0 = false,
 317 };
 318
 319 static const struct mtk_disp_ovl_data mt8173_ovl_driver_data = {
 320         .addr = DISP_REG_OVL_ADDR_MT8173,
 321         .fmt_rgb565_is_0 = true,
 322 };
 323
 324 static const struct of_device_id mtk_disp_ovl_driver_dt_match[] = {
 325         { .compatible = "mediatek,mt2701-disp-ovl",
 326           .data = &mt2701_ovl_driver_data},
 327         { .compatible = "mediatek,mt8173-disp-ovl",
 328           .data = &mt8173_ovl_driver_data},
 329         {},
 330 };
 331 MODULE_DEVICE_TABLE(of, mtk_disp_ovl_driver_dt_match);
 332
 333 struct platform_driver mtk_disp_ovl_driver = {
 334         .probe          = mtk_disp_ovl_probe,
 335         .remove         = mtk_disp_ovl_remove,
 336         .driver         = {
 337                 .name   = "mediatek-disp-ovl",
 338                 .owner  = THIS_MODULE,
 339                 .of_match_table = mtk_disp_ovl_driver_dt_match,
 340         },
 341 };