drivers/gpu/drm/mediatek/mtk_ethdr.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2021 MediaTek Inc.
   4  */
   5
   6 #include <drm/drm_blend.h>
   7 #include <drm/drm_fourcc.h>
   8 #include <drm/drm_framebuffer.h>
   9 #include <linux/clk.h>
  10 #include <linux/component.h>
  11 #include <linux/of.h>
  12 #include <linux/of_address.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/reset.h>
  15 #include <linux/soc/mediatek/mtk-cmdq.h>
  16 #include <linux/soc/mediatek/mtk-mmsys.h>
  17
  18 #include "mtk_crtc.h"
  19 #include "mtk_ddp_comp.h"
  20 #include "mtk_drm_drv.h"
  21 #include "mtk_ethdr.h"
  22
  23 #define MIX_INTEN                       0x4
  24 #define MIX_FME_CPL_INTEN                       BIT(1)
  25 #define MIX_INTSTA                      0x8
  26 #define MIX_EN                          0xc
  27 #define MIX_RST                         0x14
  28 #define MIX_ROI_SIZE                    0x18
  29 #define MIX_DATAPATH_CON                0x1c
  30 #define OUTPUT_NO_RND                           BIT(3)
  31 #define SOURCE_RGB_SEL                          BIT(7)
  32 #define BACKGROUND_RELAY                        (4 << 9)
  33 #define MIX_ROI_BGCLR                   0x20
  34 #define BGCLR_BLACK                             0xff000000
  35 #define MIX_SRC_CON                     0x24
  36 #define MIX_SRC_L0_EN                           BIT(0)
  37 #define MIX_L_SRC_CON(n)                (0x28 + 0x18 * (n))
  38 #define NON_PREMULTI_SOURCE                     (2 << 12)
  39 #define PREMULTI_SOURCE                         (3 << 12)
  40 #define MIX_L_SRC_SIZE(n)               (0x30 + 0x18 * (n))
  41 #define MIX_L_SRC_OFFSET(n)             (0x34 + 0x18 * (n))
  42 #define MIX_FUNC_DCM0                   0x120
  43 #define MIX_FUNC_DCM1                   0x124
  44 #define MIX_FUNC_DCM_ENABLE                     0xffffffff
  45
  46 #define HDR_VDO_FE_0804_HDR_DM_FE       0x804
  47 #define HDR_VDO_FE_0804_BYPASS_ALL              0xfd
  48 #define HDR_GFX_FE_0204_GFX_HDR_FE      0x204
  49 #define HDR_GFX_FE_0204_BYPASS_ALL              0xfd
  50 #define HDR_VDO_BE_0204_VDO_DM_BE       0x204
  51 #define HDR_VDO_BE_0204_BYPASS_ALL              0x7e
  52
  53 #define MIXER_INX_MODE_BYPASS                   0
  54 #define MIXER_INX_MODE_EVEN_EXTEND              1
  55 #define MIXER_ALPHA_AEN                         BIT(8)
  56 #define MIXER_ALPHA                             0xff
  57 #define ETHDR_CLK_NUM                           13
  58
  59 enum mtk_ethdr_comp_id {
  60         ETHDR_MIXER,
  61         ETHDR_VDO_FE0,
  62         ETHDR_VDO_FE1,
  63         ETHDR_GFX_FE0,
  64         ETHDR_GFX_FE1,
  65         ETHDR_VDO_BE,
  66         ETHDR_ADL_DS,
  67         ETHDR_ID_MAX
  68 };
  69
  70 struct mtk_ethdr_comp {
  71         struct device           *dev;
  72         void __iomem            *regs;
  73         struct cmdq_client_reg  cmdq_base;
  74 };
  75
  76 struct mtk_ethdr {
  77         struct mtk_ethdr_comp   ethdr_comp[ETHDR_ID_MAX];
  78         struct clk_bulk_data    ethdr_clk[ETHDR_CLK_NUM];
  79         struct device           *mmsys_dev;
  80         void                    (*vblank_cb)(void *data);
  81         void                    *vblank_cb_data;
  82         int                     irq;
  83         struct reset_control    *reset_ctl;
  84 };
  85
  86 static const char * const ethdr_clk_str[] = {
  87         "ethdr_top",
  88         "mixer",
  89         "vdo_fe0",
  90         "vdo_fe1",
  91         "gfx_fe0",
  92         "gfx_fe1",
  93         "vdo_be",
  94         "adl_ds",
  95         "vdo_fe0_async",
  96         "vdo_fe1_async",
  97         "gfx_fe0_async",
  98         "gfx_fe1_async",
  99         "vdo_be_async",
 100 };
 101
 102 void mtk_ethdr_register_vblank_cb(struct device *dev,
 103                                   void (*vblank_cb)(void *),
 104                                   void *vblank_cb_data)
 105 {
 106         struct mtk_ethdr *priv = dev_get_drvdata(dev);
 107
 108         priv->vblank_cb = vblank_cb;
 109         priv->vblank_cb_data = vblank_cb_data;
 110 }
 111
 112 void mtk_ethdr_unregister_vblank_cb(struct device *dev)
 113 {
 114         struct mtk_ethdr *priv = dev_get_drvdata(dev);
 115
 116         priv->vblank_cb = NULL;
 117         priv->vblank_cb_data = NULL;
 118 }
 119
 120 void mtk_ethdr_enable_vblank(struct device *dev)
 121 {
 122         struct mtk_ethdr *priv = dev_get_drvdata(dev);
 123
 124         writel(MIX_FME_CPL_INTEN, priv->ethdr_comp[ETHDR_MIXER].regs + MIX_INTEN);
 125 }
 126
 127 void mtk_ethdr_disable_vblank(struct device *dev)
 128 {
 129         struct mtk_ethdr *priv = dev_get_drvdata(dev);
 130
 131         writel(0x0, priv->ethdr_comp[ETHDR_MIXER].regs + MIX_INTEN);
 132 }
 133
 134 static irqreturn_t mtk_ethdr_irq_handler(int irq, void *dev_id)
 135 {
 136         struct mtk_ethdr *priv = dev_id;
 137
 138         writel(0x0, priv->ethdr_comp[ETHDR_MIXER].regs + MIX_INTSTA);
 139
 140         if (!priv->vblank_cb)
 141                 return IRQ_NONE;
 142
 143         priv->vblank_cb(priv->vblank_cb_data);
 144
 145         return IRQ_HANDLED;
 146 }
 147
 148 void mtk_ethdr_layer_config(struct device *dev, unsigned int idx,
 149                             struct mtk_plane_state *state,
 150                             struct cmdq_pkt *cmdq_pkt)
 151 {
 152         struct mtk_ethdr *priv = dev_get_drvdata(dev);
 153         struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];
 154         struct mtk_plane_pending_state *pending = &state->pending;
 155         unsigned int offset = (pending->x & 1) << 31 | pending->y << 16 | pending->x;
 156         unsigned int align_width = ALIGN_DOWN(pending->width, 2);
 157         unsigned int alpha_con = 0;
 158         bool replace_src_a = false;
 159
 160         dev_dbg(dev, "%s+ idx:%d", __func__, idx);
 161
 162         if (idx >= 4)
 163                 return;
 164
 165         if (!pending->enable || !pending->width || !pending->height) {
 166                 /*
 167                  * instead of disabling layer with MIX_SRC_CON directly
 168                  * set the size to 0 to avoid screen shift due to mixer
 169                  * mode switch (hardware behavior)
 170                  */
 171                 mtk_ddp_write(cmdq_pkt, 0, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_SIZE(idx));
 172                 return;
 173         }
 174
 175         if (state->base.fb) {
 176                 alpha_con |= MIXER_ALPHA_AEN;
 177                 alpha_con |= state->base.alpha & MIXER_ALPHA;
 178         }
 179
 180         if (state->base.pixel_blend_mode == DRM_MODE_BLEND_PREMULTI)
 181                 alpha_con |= PREMULTI_SOURCE;
 182         else
 183                 alpha_con |= NON_PREMULTI_SOURCE;
 184
 185         if ((state->base.fb && !state->base.fb->format->has_alpha) ||
 186             state->base.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE) {
 187                 /*
 188                  * Mixer doesn't support CONST_BLD mode,
 189                  * use a trick to make the output equivalent
 190                  */
 191                 replace_src_a = true;
 192         }
 193
 194         mtk_mmsys_mixer_in_config(priv->mmsys_dev, idx + 1, replace_src_a,
 195                                   MIXER_ALPHA,
 196                                   pending->x & 1 ? MIXER_INX_MODE_EVEN_EXTEND :
 197                                   MIXER_INX_MODE_BYPASS, align_width / 2 - 1, cmdq_pkt);
 198
 199         mtk_ddp_write(cmdq_pkt, pending->height << 16 | align_width, &mixer->cmdq_base,
 200                       mixer->regs, MIX_L_SRC_SIZE(idx));
 201         mtk_ddp_write(cmdq_pkt, offset, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_OFFSET(idx));
 202         mtk_ddp_write(cmdq_pkt, alpha_con, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_CON(idx));
 203         mtk_ddp_write_mask(cmdq_pkt, BIT(idx), &mixer->cmdq_base, mixer->regs, MIX_SRC_CON,
 204                            BIT(idx));
 205 }
 206
 207 void mtk_ethdr_config(struct device *dev, unsigned int w,
 208                       unsigned int h, unsigned int vrefresh,
 209                       unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
 210 {
 211         struct mtk_ethdr *priv = dev_get_drvdata(dev);
 212         struct mtk_ethdr_comp *vdo_fe0 = &priv->ethdr_comp[ETHDR_VDO_FE0];
 213         struct mtk_ethdr_comp *vdo_fe1 = &priv->ethdr_comp[ETHDR_VDO_FE1];
 214         struct mtk_ethdr_comp *gfx_fe0 = &priv->ethdr_comp[ETHDR_GFX_FE0];
 215         struct mtk_ethdr_comp *gfx_fe1 = &priv->ethdr_comp[ETHDR_GFX_FE1];
 216         struct mtk_ethdr_comp *vdo_be = &priv->ethdr_comp[ETHDR_VDO_BE];
 217         struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];
 218
 219         dev_dbg(dev, "%s-w:%d, h:%d\n", __func__, w, h);
 220
 221         mtk_ddp_write(cmdq_pkt, HDR_VDO_FE_0804_BYPASS_ALL, &vdo_fe0->cmdq_base,
 222                       vdo_fe0->regs, HDR_VDO_FE_0804_HDR_DM_FE);
 223
 224         mtk_ddp_write(cmdq_pkt, HDR_VDO_FE_0804_BYPASS_ALL, &vdo_fe1->cmdq_base,
 225                       vdo_fe1->regs, HDR_VDO_FE_0804_HDR_DM_FE);
 226
 227         mtk_ddp_write(cmdq_pkt, HDR_GFX_FE_0204_BYPASS_ALL, &gfx_fe0->cmdq_base,
 228                       gfx_fe0->regs, HDR_GFX_FE_0204_GFX_HDR_FE);
 229
 230         mtk_ddp_write(cmdq_pkt, HDR_GFX_FE_0204_BYPASS_ALL, &gfx_fe1->cmdq_base,
 231                       gfx_fe1->regs, HDR_GFX_FE_0204_GFX_HDR_FE);
 232
 233         mtk_ddp_write(cmdq_pkt, HDR_VDO_BE_0204_BYPASS_ALL, &vdo_be->cmdq_base,
 234                       vdo_be->regs, HDR_VDO_BE_0204_VDO_DM_BE);
 235
 236         mtk_ddp_write(cmdq_pkt, MIX_FUNC_DCM_ENABLE, &mixer->cmdq_base, mixer->regs, MIX_FUNC_DCM0);
 237         mtk_ddp_write(cmdq_pkt, MIX_FUNC_DCM_ENABLE, &mixer->cmdq_base, mixer->regs, MIX_FUNC_DCM1);
 238         mtk_ddp_write(cmdq_pkt, h << 16 | w, &mixer->cmdq_base, mixer->regs, MIX_ROI_SIZE);
 239         mtk_ddp_write(cmdq_pkt, BGCLR_BLACK, &mixer->cmdq_base, mixer->regs, MIX_ROI_BGCLR);
 240         mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
 241                       MIX_L_SRC_CON(0));
 242         mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
 243                       MIX_L_SRC_CON(1));
 244         mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
 245                       MIX_L_SRC_CON(2));
 246         mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
 247                       MIX_L_SRC_CON(3));
 248         mtk_ddp_write(cmdq_pkt, 0x0, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_SIZE(0));
 249         mtk_ddp_write(cmdq_pkt, OUTPUT_NO_RND | SOURCE_RGB_SEL | BACKGROUND_RELAY,
 250                       &mixer->cmdq_base, mixer->regs, MIX_DATAPATH_CON);
 251         mtk_ddp_write_mask(cmdq_pkt, MIX_SRC_L0_EN, &mixer->cmdq_base, mixer->regs,
 252                            MIX_SRC_CON, MIX_SRC_L0_EN);
 253
 254         mtk_mmsys_hdr_config(priv->mmsys_dev, w / 2, h, cmdq_pkt);
 255         mtk_mmsys_mixer_in_channel_swap(priv->mmsys_dev, 4, 0, cmdq_pkt);
 256 }
 257
 258 void mtk_ethdr_start(struct device *dev)
 259 {
 260         struct mtk_ethdr *priv = dev_get_drvdata(dev);
 261         struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];
 262
 263         writel(1, mixer->regs + MIX_EN);
 264 }
 265
 266 void mtk_ethdr_stop(struct device *dev)
 267 {
 268         struct mtk_ethdr *priv = dev_get_drvdata(dev);
 269         struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];
 270
 271         writel(0, mixer->regs + MIX_EN);
 272         writel(1, mixer->regs + MIX_RST);
 273         reset_control_reset(priv->reset_ctl);
 274         writel(0, mixer->regs + MIX_RST);
 275 }
 276
 277 int mtk_ethdr_clk_enable(struct device *dev)
 278 {
 279         int ret;
 280         struct mtk_ethdr *priv = dev_get_drvdata(dev);
 281
 282         ret = clk_bulk_prepare_enable(ETHDR_CLK_NUM, priv->ethdr_clk);
 283         if (ret)
 284                 dev_err(dev,
 285                         "ethdr_clk prepare enable failed\n");
 286         return ret;
 287 }
 288
 289 void mtk_ethdr_clk_disable(struct device *dev)
 290 {
 291         struct mtk_ethdr *priv = dev_get_drvdata(dev);
 292
 293         clk_bulk_disable_unprepare(ETHDR_CLK_NUM, priv->ethdr_clk);
 294 }
 295
 296 static int mtk_ethdr_bind(struct device *dev, struct device *master,
 297                           void *data)
 298 {
 299         struct mtk_ethdr *priv = dev_get_drvdata(dev);
 300
 301         priv->mmsys_dev = data;
 302         return 0;
 303 }
 304
 305 static void mtk_ethdr_unbind(struct device *dev, struct device *master, void *data)
 306 {
 307 }
 308
 309 static const struct component_ops mtk_ethdr_component_ops = {
 310         .bind   = mtk_ethdr_bind,
 311         .unbind = mtk_ethdr_unbind,
 312 };
 313
 314 static int mtk_ethdr_probe(struct platform_device *pdev)
 315 {
 316         struct device *dev = &pdev->dev;
 317         struct mtk_ethdr *priv;
 318         int ret;
 319         int i;
 320
 321         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 322         if (!priv)
 323                 return -ENOMEM;
 324
 325         for (i = 0; i < ETHDR_ID_MAX; i++) {
 326                 priv->ethdr_comp[i].dev = dev;
 327                 priv->ethdr_comp[i].regs = of_iomap(dev->of_node, i);
 328 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 329                 ret = cmdq_dev_get_client_reg(dev,
 330                                               &priv->ethdr_comp[i].cmdq_base, i);
 331                 if (ret)
 332                         dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
 333 #endif
 334                 dev_dbg(dev, "[DRM]regs:0x%p, node:%d\n", priv->ethdr_comp[i].regs, i);
 335         }
 336
 337         for (i = 0; i < ETHDR_CLK_NUM; i++)
 338                 priv->ethdr_clk[i].id = ethdr_clk_str[i];
 339         ret = devm_clk_bulk_get_optional(dev, ETHDR_CLK_NUM, priv->ethdr_clk);
 340         if (ret)
 341                 return ret;
 342
 343         priv->irq = platform_get_irq(pdev, 0);
 344         if (priv->irq < 0)
 345                 priv->irq = 0;
 346
 347         if (priv->irq) {
 348                 ret = devm_request_irq(dev, priv->irq, mtk_ethdr_irq_handler,
 349                                        IRQF_TRIGGER_NONE, dev_name(dev), priv);
 350                 if (ret < 0)
 351                         return dev_err_probe(dev, ret,
 352                                              "Failed to request irq %d\n",
 353                                              priv->irq);
 354         }
 355
 356         priv->reset_ctl = devm_reset_control_array_get_optional_exclusive(dev);
 357         if (IS_ERR(priv->reset_ctl))
 358                 return dev_err_probe(dev, PTR_ERR(priv->reset_ctl),
 359                                      "cannot get ethdr reset control\n");
 360
 361         platform_set_drvdata(pdev, priv);
 362
 363         ret = component_add(dev, &mtk_ethdr_component_ops);
 364         if (ret)
 365                 return dev_err_probe(dev, ret, "Failed to add component\n");
 366
 367         return 0;
 368 }
 369
 370 static void mtk_ethdr_remove(struct platform_device *pdev)
 371 {
 372         component_del(&pdev->dev, &mtk_ethdr_component_ops);
 373 }
 374
 375 static const struct of_device_id mtk_ethdr_driver_dt_match[] = {
 376         { .compatible = "mediatek,mt8195-disp-ethdr"},
 377         {},
 378 };
 379
 380 MODULE_DEVICE_TABLE(of, mtk_ethdr_driver_dt_match);
 381
 382 struct platform_driver mtk_ethdr_driver = {
 383         .probe          = mtk_ethdr_probe,
 384         .remove_new     = mtk_ethdr_remove,
 385         .driver         = {
 386                 .name   = "mediatek-disp-ethdr",
 387                 .of_match_table = mtk_ethdr_driver_dt_match,
 388         },
 389 };