drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c

   1 /*
   2  * Copyright (C) 2016 Maxime Ripard
   3  *
   4  * Maxime Ripard <maxime.ripard@free-electrons.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of
   9  * the License, or (at your option) any later version.
  10  */
  11
  12 #include <drm/drmP.h>
  13 #include <drm/drm_atomic_helper.h>
  14 #include <drm/drm_crtc_helper.h>
  15 #include <drm/drm_edid.h>
  16 #include <drm/drm_encoder.h>
  17 #include <drm/drm_of.h>
  18 #include <drm/drm_panel.h>
  19
  20 #include <linux/clk.h>
  21 #include <linux/component.h>
  22 #include <linux/iopoll.h>
  23 #include <linux/of_device.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/pm_runtime.h>
  26 #include <linux/regmap.h>
  27 #include <linux/reset.h>
  28
  29 #include "sun4i_backend.h"
  30 #include "sun4i_crtc.h"
  31 #include "sun4i_drv.h"
  32 #include "sun4i_hdmi.h"
  33
  34 static inline struct sun4i_hdmi *
  35 drm_encoder_to_sun4i_hdmi(struct drm_encoder *encoder)
  36 {
  37         return container_of(encoder, struct sun4i_hdmi,
  38                             encoder);
  39 }
  40
  41 static inline struct sun4i_hdmi *
  42 drm_connector_to_sun4i_hdmi(struct drm_connector *connector)
  43 {
  44         return container_of(connector, struct sun4i_hdmi,
  45                             connector);
  46 }
  47
  48 static int sun4i_hdmi_setup_avi_infoframes(struct sun4i_hdmi *hdmi,
  49                                            struct drm_display_mode *mode)
  50 {
  51         struct hdmi_avi_infoframe frame;
  52         u8 buffer[17];
  53         int i, ret;
  54
  55         ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode, false);
  56         if (ret < 0) {
  57                 DRM_ERROR("Failed to get infoframes from mode\n");
  58                 return ret;
  59         }
  60
  61         ret = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
  62         if (ret < 0) {
  63                 DRM_ERROR("Failed to pack infoframes\n");
  64                 return ret;
  65         }
  66
  67         for (i = 0; i < sizeof(buffer); i++)
  68                 writeb(buffer[i], hdmi->base + SUN4I_HDMI_AVI_INFOFRAME_REG(i));
  69
  70         return 0;
  71 }
  72
  73 static int sun4i_hdmi_atomic_check(struct drm_encoder *encoder,
  74                                    struct drm_crtc_state *crtc_state,
  75                                    struct drm_connector_state *conn_state)
  76 {
  77         struct drm_display_mode *mode = &crtc_state->mode;
  78
  79         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
  80                 return -EINVAL;
  81
  82         return 0;
  83 }
  84
  85 static void sun4i_hdmi_disable(struct drm_encoder *encoder)
  86 {
  87         struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
  88         u32 val;
  89
  90         DRM_DEBUG_DRIVER("Disabling the HDMI Output\n");
  91
  92         val = readl(hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
  93         val &= ~SUN4I_HDMI_VID_CTRL_ENABLE;
  94         writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
  95
  96         clk_disable_unprepare(hdmi->tmds_clk);
  97 }
  98
  99 static void sun4i_hdmi_enable(struct drm_encoder *encoder)
 100 {
 101         struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
 102         struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
 103         u32 val = 0;
 104
 105         DRM_DEBUG_DRIVER("Enabling the HDMI Output\n");
 106
 107         clk_prepare_enable(hdmi->tmds_clk);
 108
 109         sun4i_hdmi_setup_avi_infoframes(hdmi, mode);
 110         val |= SUN4I_HDMI_PKT_CTRL_TYPE(0, SUN4I_HDMI_PKT_AVI);
 111         val |= SUN4I_HDMI_PKT_CTRL_TYPE(1, SUN4I_HDMI_PKT_END);
 112         writel(val, hdmi->base + SUN4I_HDMI_PKT_CTRL_REG(0));
 113
 114         val = SUN4I_HDMI_VID_CTRL_ENABLE;
 115         if (hdmi->hdmi_monitor)
 116                 val |= SUN4I_HDMI_VID_CTRL_HDMI_MODE;
 117
 118         writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
 119 }
 120
 121 static void sun4i_hdmi_mode_set(struct drm_encoder *encoder,
 122                                 struct drm_display_mode *mode,
 123                                 struct drm_display_mode *adjusted_mode)
 124 {
 125         struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
 126         unsigned int x, y;
 127         u32 val;
 128
 129         clk_set_rate(hdmi->mod_clk, mode->crtc_clock * 1000);
 130         clk_set_rate(hdmi->tmds_clk, mode->crtc_clock * 1000);
 131
 132         /* Set input sync enable */
 133         writel(SUN4I_HDMI_UNKNOWN_INPUT_SYNC,
 134                hdmi->base + SUN4I_HDMI_UNKNOWN_REG);
 135
 136         /*
 137          * Setup output pad (?) controls
 138          *
 139          * This is done here instead of at probe/bind time because
 140          * the controller seems to toggle some of the bits on its own.
 141          *
 142          * We can't just initialize the register there, we need to
 143          * protect the clock bits that have already been read out and
 144          * cached by the clock framework.
 145          */
 146         val = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
 147         val &= SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;
 148         val |= hdmi->variant->pad_ctrl1_init_val;
 149         writel(val, hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
 150         val = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
 151
 152         /* Setup timing registers */
 153         writel(SUN4I_HDMI_VID_TIMING_X(mode->hdisplay) |
 154                SUN4I_HDMI_VID_TIMING_Y(mode->vdisplay),
 155                hdmi->base + SUN4I_HDMI_VID_TIMING_ACT_REG);
 156
 157         x = mode->htotal - mode->hsync_start;
 158         y = mode->vtotal - mode->vsync_start;
 159         writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
 160                hdmi->base + SUN4I_HDMI_VID_TIMING_BP_REG);
 161
 162         x = mode->hsync_start - mode->hdisplay;
 163         y = mode->vsync_start - mode->vdisplay;
 164         writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
 165                hdmi->base + SUN4I_HDMI_VID_TIMING_FP_REG);
 166
 167         x = mode->hsync_end - mode->hsync_start;
 168         y = mode->vsync_end - mode->vsync_start;
 169         writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
 170                hdmi->base + SUN4I_HDMI_VID_TIMING_SPW_REG);
 171
 172         val = SUN4I_HDMI_VID_TIMING_POL_TX_CLK;
 173         if (mode->flags & DRM_MODE_FLAG_PHSYNC)
 174                 val |= SUN4I_HDMI_VID_TIMING_POL_HSYNC;
 175
 176         if (mode->flags & DRM_MODE_FLAG_PVSYNC)
 177                 val |= SUN4I_HDMI_VID_TIMING_POL_VSYNC;
 178
 179         writel(val, hdmi->base + SUN4I_HDMI_VID_TIMING_POL_REG);
 180 }
 181
 182 static enum drm_mode_status sun4i_hdmi_mode_valid(struct drm_encoder *encoder,
 183                                         const struct drm_display_mode *mode)
 184 {
 185         struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
 186         unsigned long rate = mode->clock * 1000;
 187         unsigned long diff = rate / 200; /* +-0.5% allowed by HDMI spec */
 188         long rounded_rate;
 189
 190         /* 165 MHz is the typical max pixelclock frequency for HDMI <= 1.2 */
 191         if (rate > 165000000)
 192                 return MODE_CLOCK_HIGH;
 193         rounded_rate = clk_round_rate(hdmi->tmds_clk, rate);
 194         if (rounded_rate > 0 &&
 195             max_t(unsigned long, rounded_rate, rate) -
 196             min_t(unsigned long, rounded_rate, rate) < diff)
 197                 return MODE_OK;
 198         return MODE_NOCLOCK;
 199 }
 200
 201 static const struct drm_encoder_helper_funcs sun4i_hdmi_helper_funcs = {
 202         .atomic_check   = sun4i_hdmi_atomic_check,
 203         .disable        = sun4i_hdmi_disable,
 204         .enable         = sun4i_hdmi_enable,
 205         .mode_set       = sun4i_hdmi_mode_set,
 206         .mode_valid     = sun4i_hdmi_mode_valid,
 207 };
 208
 209 static const struct drm_encoder_funcs sun4i_hdmi_funcs = {
 210         .destroy        = drm_encoder_cleanup,
 211 };
 212
 213 static int sun4i_hdmi_get_modes(struct drm_connector *connector)
 214 {
 215         struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
 216         struct edid *edid;
 217         int ret;
 218
 219         edid = drm_get_edid(connector, hdmi->i2c);
 220         if (!edid)
 221                 return 0;
 222
 223         hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);
 224         DRM_DEBUG_DRIVER("Monitor is %s monitor\n",
 225                          hdmi->hdmi_monitor ? "an HDMI" : "a DVI");
 226
 227         drm_connector_update_edid_property(connector, edid);
 228         cec_s_phys_addr_from_edid(hdmi->cec_adap, edid);
 229         ret = drm_add_edid_modes(connector, edid);
 230         kfree(edid);
 231
 232         return ret;
 233 }
 234
 235 static const struct drm_connector_helper_funcs sun4i_hdmi_connector_helper_funcs = {
 236         .get_modes      = sun4i_hdmi_get_modes,
 237 };
 238
 239 static enum drm_connector_status
 240 sun4i_hdmi_connector_detect(struct drm_connector *connector, bool force)
 241 {
 242         struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
 243         unsigned long reg;
 244
 245         reg = readl(hdmi->base + SUN4I_HDMI_HPD_REG);
 246         if (!(reg & SUN4I_HDMI_HPD_HIGH)) {
 247                 cec_phys_addr_invalidate(hdmi->cec_adap);
 248                 return connector_status_disconnected;
 249         }
 250
 251         return connector_status_connected;
 252 }
 253
 254 static const struct drm_connector_funcs sun4i_hdmi_connector_funcs = {
 255         .detect                 = sun4i_hdmi_connector_detect,
 256         .fill_modes             = drm_helper_probe_single_connector_modes,
 257         .destroy                = drm_connector_cleanup,
 258         .reset                  = drm_atomic_helper_connector_reset,
 259         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 260         .atomic_destroy_state   = drm_atomic_helper_connector_destroy_state,
 261 };
 262
 263 #ifdef CONFIG_DRM_SUN4I_HDMI_CEC
 264 static bool sun4i_hdmi_cec_pin_read(struct cec_adapter *adap)
 265 {
 266         struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
 267
 268         return readl(hdmi->base + SUN4I_HDMI_CEC) & SUN4I_HDMI_CEC_RX;
 269 }
 270
 271 static void sun4i_hdmi_cec_pin_low(struct cec_adapter *adap)
 272 {
 273         struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
 274
 275         /* Start driving the CEC pin low */
 276         writel(SUN4I_HDMI_CEC_ENABLE, hdmi->base + SUN4I_HDMI_CEC);
 277 }
 278
 279 static void sun4i_hdmi_cec_pin_high(struct cec_adapter *adap)
 280 {
 281         struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
 282
 283         /*
 284          * Stop driving the CEC pin, the pull up will take over
 285          * unless another CEC device is driving the pin low.
 286          */
 287         writel(0, hdmi->base + SUN4I_HDMI_CEC);
 288 }
 289
 290 static const struct cec_pin_ops sun4i_hdmi_cec_pin_ops = {
 291         .read = sun4i_hdmi_cec_pin_read,
 292         .low = sun4i_hdmi_cec_pin_low,
 293         .high = sun4i_hdmi_cec_pin_high,
 294 };
 295 #endif
 296
 297 #define SUN4I_HDMI_PAD_CTRL1_MASK       (GENMASK(24, 7) | GENMASK(5, 0))
 298 #define SUN4I_HDMI_PLL_CTRL_MASK        (GENMASK(31, 8) | GENMASK(3, 0))
 299
 300 /* Only difference from sun5i is AMP is 4 instead of 6 */
 301 static const struct sun4i_hdmi_variant sun4i_variant = {
 302         .pad_ctrl0_init_val     = SUN4I_HDMI_PAD_CTRL0_TXEN |
 303                                   SUN4I_HDMI_PAD_CTRL0_CKEN |
 304                                   SUN4I_HDMI_PAD_CTRL0_PWENG |
 305                                   SUN4I_HDMI_PAD_CTRL0_PWEND |
 306                                   SUN4I_HDMI_PAD_CTRL0_PWENC |
 307                                   SUN4I_HDMI_PAD_CTRL0_LDODEN |
 308                                   SUN4I_HDMI_PAD_CTRL0_LDOCEN |
 309                                   SUN4I_HDMI_PAD_CTRL0_BIASEN,
 310         .pad_ctrl1_init_val     = SUN4I_HDMI_PAD_CTRL1_REG_AMP(4) |
 311                                   SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) |
 312                                   SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
 313                                   SUN4I_HDMI_PAD_CTRL1_REG_DEN |
 314                                   SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
 315                                   SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
 316                                   SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
 317                                   SUN4I_HDMI_PAD_CTRL1_AMP_OPT,
 318         .pll_ctrl_init_val      = SUN4I_HDMI_PLL_CTRL_VCO_S(8) |
 319                                   SUN4I_HDMI_PLL_CTRL_CS(7) |
 320                                   SUN4I_HDMI_PLL_CTRL_CP_S(15) |
 321                                   SUN4I_HDMI_PLL_CTRL_S(7) |
 322                                   SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) |
 323                                   SUN4I_HDMI_PLL_CTRL_SDIV2 |
 324                                   SUN4I_HDMI_PLL_CTRL_LDO2_EN |
 325                                   SUN4I_HDMI_PLL_CTRL_LDO1_EN |
 326                                   SUN4I_HDMI_PLL_CTRL_HV_IS_33 |
 327                                   SUN4I_HDMI_PLL_CTRL_BWS |
 328                                   SUN4I_HDMI_PLL_CTRL_PLL_EN,
 329
 330         .ddc_clk_reg            = REG_FIELD(SUN4I_HDMI_DDC_CLK_REG, 0, 6),
 331         .ddc_clk_pre_divider    = 2,
 332         .ddc_clk_m_offset       = 1,
 333
 334         .field_ddc_en           = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 31, 31),
 335         .field_ddc_start        = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 30, 30),
 336         .field_ddc_reset        = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 0, 0),
 337         .field_ddc_addr_reg     = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 31),
 338         .field_ddc_slave_addr   = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 6),
 339         .field_ddc_int_status   = REG_FIELD(SUN4I_HDMI_DDC_INT_STATUS_REG, 0, 8),
 340         .field_ddc_fifo_clear   = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 31, 31),
 341         .field_ddc_fifo_rx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 4, 7),
 342         .field_ddc_fifo_tx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 0, 3),
 343         .field_ddc_byte_count   = REG_FIELD(SUN4I_HDMI_DDC_BYTE_COUNT_REG, 0, 9),
 344         .field_ddc_cmd          = REG_FIELD(SUN4I_HDMI_DDC_CMD_REG, 0, 2),
 345         .field_ddc_sda_en       = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 9, 9),
 346         .field_ddc_sck_en       = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 8, 8),
 347
 348         .ddc_fifo_reg           = SUN4I_HDMI_DDC_FIFO_DATA_REG,
 349         .ddc_fifo_has_dir       = true,
 350 };
 351
 352 static const struct sun4i_hdmi_variant sun5i_variant = {
 353         .pad_ctrl0_init_val     = SUN4I_HDMI_PAD_CTRL0_TXEN |
 354                                   SUN4I_HDMI_PAD_CTRL0_CKEN |
 355                                   SUN4I_HDMI_PAD_CTRL0_PWENG |
 356                                   SUN4I_HDMI_PAD_CTRL0_PWEND |
 357                                   SUN4I_HDMI_PAD_CTRL0_PWENC |
 358                                   SUN4I_HDMI_PAD_CTRL0_LDODEN |
 359                                   SUN4I_HDMI_PAD_CTRL0_LDOCEN |
 360                                   SUN4I_HDMI_PAD_CTRL0_BIASEN,
 361         .pad_ctrl1_init_val     = SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) |
 362                                   SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) |
 363                                   SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
 364                                   SUN4I_HDMI_PAD_CTRL1_REG_DEN |
 365                                   SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
 366                                   SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
 367                                   SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
 368                                   SUN4I_HDMI_PAD_CTRL1_AMP_OPT,
 369         .pll_ctrl_init_val      = SUN4I_HDMI_PLL_CTRL_VCO_S(8) |
 370                                   SUN4I_HDMI_PLL_CTRL_CS(7) |
 371                                   SUN4I_HDMI_PLL_CTRL_CP_S(15) |
 372                                   SUN4I_HDMI_PLL_CTRL_S(7) |
 373                                   SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) |
 374                                   SUN4I_HDMI_PLL_CTRL_SDIV2 |
 375                                   SUN4I_HDMI_PLL_CTRL_LDO2_EN |
 376                                   SUN4I_HDMI_PLL_CTRL_LDO1_EN |
 377                                   SUN4I_HDMI_PLL_CTRL_HV_IS_33 |
 378                                   SUN4I_HDMI_PLL_CTRL_BWS |
 379                                   SUN4I_HDMI_PLL_CTRL_PLL_EN,
 380
 381         .ddc_clk_reg            = REG_FIELD(SUN4I_HDMI_DDC_CLK_REG, 0, 6),
 382         .ddc_clk_pre_divider    = 2,
 383         .ddc_clk_m_offset       = 1,
 384
 385         .field_ddc_en           = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 31, 31),
 386         .field_ddc_start        = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 30, 30),
 387         .field_ddc_reset        = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 0, 0),
 388         .field_ddc_addr_reg     = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 31),
 389         .field_ddc_slave_addr   = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 6),
 390         .field_ddc_int_status   = REG_FIELD(SUN4I_HDMI_DDC_INT_STATUS_REG, 0, 8),
 391         .field_ddc_fifo_clear   = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 31, 31),
 392         .field_ddc_fifo_rx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 4, 7),
 393         .field_ddc_fifo_tx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 0, 3),
 394         .field_ddc_byte_count   = REG_FIELD(SUN4I_HDMI_DDC_BYTE_COUNT_REG, 0, 9),
 395         .field_ddc_cmd          = REG_FIELD(SUN4I_HDMI_DDC_CMD_REG, 0, 2),
 396         .field_ddc_sda_en       = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 9, 9),
 397         .field_ddc_sck_en       = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 8, 8),
 398
 399         .ddc_fifo_reg           = SUN4I_HDMI_DDC_FIFO_DATA_REG,
 400         .ddc_fifo_has_dir       = true,
 401 };
 402
 403 static const struct sun4i_hdmi_variant sun6i_variant = {
 404         .has_ddc_parent_clk     = true,
 405         .has_reset_control      = true,
 406         .pad_ctrl0_init_val     = 0xff |
 407                                   SUN4I_HDMI_PAD_CTRL0_TXEN |
 408                                   SUN4I_HDMI_PAD_CTRL0_CKEN |
 409                                   SUN4I_HDMI_PAD_CTRL0_PWENG |
 410                                   SUN4I_HDMI_PAD_CTRL0_PWEND |
 411                                   SUN4I_HDMI_PAD_CTRL0_PWENC |
 412                                   SUN4I_HDMI_PAD_CTRL0_LDODEN |
 413                                   SUN4I_HDMI_PAD_CTRL0_LDOCEN,
 414         .pad_ctrl1_init_val     = SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) |
 415                                   SUN4I_HDMI_PAD_CTRL1_REG_EMP(4) |
 416                                   SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
 417                                   SUN4I_HDMI_PAD_CTRL1_REG_DEN |
 418                                   SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
 419                                   SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
 420                                   SUN4I_HDMI_PAD_CTRL1_PWSDT |
 421                                   SUN4I_HDMI_PAD_CTRL1_PWSCK |
 422                                   SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
 423                                   SUN4I_HDMI_PAD_CTRL1_AMP_OPT |
 424                                   SUN4I_HDMI_PAD_CTRL1_UNKNOWN,
 425         .pll_ctrl_init_val      = SUN4I_HDMI_PLL_CTRL_VCO_S(8) |
 426                                   SUN4I_HDMI_PLL_CTRL_CS(3) |
 427                                   SUN4I_HDMI_PLL_CTRL_CP_S(10) |
 428                                   SUN4I_HDMI_PLL_CTRL_S(4) |
 429                                   SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) |
 430                                   SUN4I_HDMI_PLL_CTRL_SDIV2 |
 431                                   SUN4I_HDMI_PLL_CTRL_LDO2_EN |
 432                                   SUN4I_HDMI_PLL_CTRL_LDO1_EN |
 433                                   SUN4I_HDMI_PLL_CTRL_HV_IS_33 |
 434                                   SUN4I_HDMI_PLL_CTRL_PLL_EN,
 435
 436         .ddc_clk_reg            = REG_FIELD(SUN6I_HDMI_DDC_CLK_REG, 0, 6),
 437         .ddc_clk_pre_divider    = 1,
 438         .ddc_clk_m_offset       = 2,
 439
 440         .tmds_clk_div_offset    = 1,
 441
 442         .field_ddc_en           = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 0, 0),
 443         .field_ddc_start        = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 27, 27),
 444         .field_ddc_reset        = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 31, 31),
 445         .field_ddc_addr_reg     = REG_FIELD(SUN6I_HDMI_DDC_ADDR_REG, 1, 31),
 446         .field_ddc_slave_addr   = REG_FIELD(SUN6I_HDMI_DDC_ADDR_REG, 1, 7),
 447         .field_ddc_int_status   = REG_FIELD(SUN6I_HDMI_DDC_INT_STATUS_REG, 0, 8),
 448         .field_ddc_fifo_clear   = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 18, 18),
 449         .field_ddc_fifo_rx_thres = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 4, 7),
 450         .field_ddc_fifo_tx_thres = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 0, 3),
 451         .field_ddc_byte_count   = REG_FIELD(SUN6I_HDMI_DDC_CMD_REG, 16, 25),
 452         .field_ddc_cmd          = REG_FIELD(SUN6I_HDMI_DDC_CMD_REG, 0, 2),
 453         .field_ddc_sda_en       = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 6, 6),
 454         .field_ddc_sck_en       = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 4, 4),
 455
 456         .ddc_fifo_reg           = SUN6I_HDMI_DDC_FIFO_DATA_REG,
 457         .ddc_fifo_thres_incl    = true,
 458 };
 459
 460 static const struct regmap_config sun4i_hdmi_regmap_config = {
 461         .reg_bits       = 32,
 462         .val_bits       = 32,
 463         .reg_stride     = 4,
 464         .max_register   = 0x580,
 465 };
 466
 467 static int sun4i_hdmi_bind(struct device *dev, struct device *master,
 468                            void *data)
 469 {
 470         struct platform_device *pdev = to_platform_device(dev);
 471         struct drm_device *drm = data;
 472         struct sun4i_drv *drv = drm->dev_private;
 473         struct sun4i_hdmi *hdmi;
 474         struct resource *res;
 475         u32 reg;
 476         int ret;
 477
 478         hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
 479         if (!hdmi)
 480                 return -ENOMEM;
 481         dev_set_drvdata(dev, hdmi);
 482         hdmi->dev = dev;
 483         hdmi->drv = drv;
 484
 485         hdmi->variant = of_device_get_match_data(dev);
 486         if (!hdmi->variant)
 487                 return -EINVAL;
 488
 489         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 490         hdmi->base = devm_ioremap_resource(dev, res);
 491         if (IS_ERR(hdmi->base)) {
 492                 dev_err(dev, "Couldn't map the HDMI encoder registers\n");
 493                 return PTR_ERR(hdmi->base);
 494         }
 495
 496         if (hdmi->variant->has_reset_control) {
 497                 hdmi->reset = devm_reset_control_get(dev, NULL);
 498                 if (IS_ERR(hdmi->reset)) {
 499                         dev_err(dev, "Couldn't get the HDMI reset control\n");
 500                         return PTR_ERR(hdmi->reset);
 501                 }
 502
 503                 ret = reset_control_deassert(hdmi->reset);
 504                 if (ret) {
 505                         dev_err(dev, "Couldn't deassert HDMI reset\n");
 506                         return ret;
 507                 }
 508         }
 509
 510         hdmi->bus_clk = devm_clk_get(dev, "ahb");
 511         if (IS_ERR(hdmi->bus_clk)) {
 512                 dev_err(dev, "Couldn't get the HDMI bus clock\n");
 513                 ret = PTR_ERR(hdmi->bus_clk);
 514                 goto err_assert_reset;
 515         }
 516         clk_prepare_enable(hdmi->bus_clk);
 517
 518         hdmi->mod_clk = devm_clk_get(dev, "mod");
 519         if (IS_ERR(hdmi->mod_clk)) {
 520                 dev_err(dev, "Couldn't get the HDMI mod clock\n");
 521                 ret = PTR_ERR(hdmi->mod_clk);
 522                 goto err_disable_bus_clk;
 523         }
 524         clk_prepare_enable(hdmi->mod_clk);
 525
 526         hdmi->pll0_clk = devm_clk_get(dev, "pll-0");
 527         if (IS_ERR(hdmi->pll0_clk)) {
 528                 dev_err(dev, "Couldn't get the HDMI PLL 0 clock\n");
 529                 ret = PTR_ERR(hdmi->pll0_clk);
 530                 goto err_disable_mod_clk;
 531         }
 532
 533         hdmi->pll1_clk = devm_clk_get(dev, "pll-1");
 534         if (IS_ERR(hdmi->pll1_clk)) {
 535                 dev_err(dev, "Couldn't get the HDMI PLL 1 clock\n");
 536                 ret = PTR_ERR(hdmi->pll1_clk);
 537                 goto err_disable_mod_clk;
 538         }
 539
 540         hdmi->regmap = devm_regmap_init_mmio(dev, hdmi->base,
 541                                              &sun4i_hdmi_regmap_config);
 542         if (IS_ERR(hdmi->regmap)) {
 543                 dev_err(dev, "Couldn't create HDMI encoder regmap\n");
 544                 ret = PTR_ERR(hdmi->regmap);
 545                 goto err_disable_mod_clk;
 546         }
 547
 548         ret = sun4i_tmds_create(hdmi);
 549         if (ret) {
 550                 dev_err(dev, "Couldn't create the TMDS clock\n");
 551                 goto err_disable_mod_clk;
 552         }
 553
 554         if (hdmi->variant->has_ddc_parent_clk) {
 555                 hdmi->ddc_parent_clk = devm_clk_get(dev, "ddc");
 556                 if (IS_ERR(hdmi->ddc_parent_clk)) {
 557                         dev_err(dev, "Couldn't get the HDMI DDC clock\n");
 558                         ret = PTR_ERR(hdmi->ddc_parent_clk);
 559                         goto err_disable_mod_clk;
 560                 }
 561         } else {
 562                 hdmi->ddc_parent_clk = hdmi->tmds_clk;
 563         }
 564
 565         writel(SUN4I_HDMI_CTRL_ENABLE, hdmi->base + SUN4I_HDMI_CTRL_REG);
 566
 567         writel(hdmi->variant->pad_ctrl0_init_val,
 568                hdmi->base + SUN4I_HDMI_PAD_CTRL0_REG);
 569
 570         reg = readl(hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
 571         reg &= SUN4I_HDMI_PLL_CTRL_DIV_MASK;
 572         reg |= hdmi->variant->pll_ctrl_init_val;
 573         writel(reg, hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
 574
 575         ret = sun4i_hdmi_i2c_create(dev, hdmi);
 576         if (ret) {
 577                 dev_err(dev, "Couldn't create the HDMI I2C adapter\n");
 578                 goto err_disable_mod_clk;
 579         }
 580
 581         drm_encoder_helper_add(&hdmi->encoder,
 582                                &sun4i_hdmi_helper_funcs);
 583         ret = drm_encoder_init(drm,
 584                                &hdmi->encoder,
 585                                &sun4i_hdmi_funcs,
 586                                DRM_MODE_ENCODER_TMDS,
 587                                NULL);
 588         if (ret) {
 589                 dev_err(dev, "Couldn't initialise the HDMI encoder\n");
 590                 goto err_del_i2c_adapter;
 591         }
 592
 593         hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm,
 594                                                                   dev->of_node);
 595         if (!hdmi->encoder.possible_crtcs) {
 596                 ret = -EPROBE_DEFER;
 597                 goto err_del_i2c_adapter;
 598         }
 599
 600 #ifdef CONFIG_DRM_SUN4I_HDMI_CEC
 601         hdmi->cec_adap = cec_pin_allocate_adapter(&sun4i_hdmi_cec_pin_ops,
 602                 hdmi, "sun4i", CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS |
 603                 CEC_CAP_PASSTHROUGH | CEC_CAP_RC);
 604         ret = PTR_ERR_OR_ZERO(hdmi->cec_adap);
 605         if (ret < 0)
 606                 goto err_cleanup_connector;
 607         writel(readl(hdmi->base + SUN4I_HDMI_CEC) & ~SUN4I_HDMI_CEC_TX,
 608                hdmi->base + SUN4I_HDMI_CEC);
 609 #endif
 610
 611         drm_connector_helper_add(&hdmi->connector,
 612                                  &sun4i_hdmi_connector_helper_funcs);
 613         ret = drm_connector_init(drm, &hdmi->connector,
 614                                  &sun4i_hdmi_connector_funcs,
 615                                  DRM_MODE_CONNECTOR_HDMIA);
 616         if (ret) {
 617                 dev_err(dev,
 618                         "Couldn't initialise the HDMI connector\n");
 619                 goto err_cleanup_connector;
 620         }
 621
 622         /* There is no HPD interrupt, so we need to poll the controller */
 623         hdmi->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
 624                 DRM_CONNECTOR_POLL_DISCONNECT;
 625
 626         ret = cec_register_adapter(hdmi->cec_adap, dev);
 627         if (ret < 0)
 628                 goto err_cleanup_connector;
 629         drm_connector_attach_encoder(&hdmi->connector, &hdmi->encoder);
 630
 631         return 0;
 632
 633 err_cleanup_connector:
 634         cec_delete_adapter(hdmi->cec_adap);
 635         drm_encoder_cleanup(&hdmi->encoder);
 636 err_del_i2c_adapter:
 637         i2c_del_adapter(hdmi->i2c);
 638 err_disable_mod_clk:
 639         clk_disable_unprepare(hdmi->mod_clk);
 640 err_disable_bus_clk:
 641         clk_disable_unprepare(hdmi->bus_clk);
 642 err_assert_reset:
 643         reset_control_assert(hdmi->reset);
 644         return ret;
 645 }
 646
 647 static void sun4i_hdmi_unbind(struct device *dev, struct device *master,
 648                             void *data)
 649 {
 650         struct sun4i_hdmi *hdmi = dev_get_drvdata(dev);
 651
 652         cec_unregister_adapter(hdmi->cec_adap);
 653         i2c_del_adapter(hdmi->i2c);
 654         clk_disable_unprepare(hdmi->mod_clk);
 655         clk_disable_unprepare(hdmi->bus_clk);
 656 }
 657
 658 static const struct component_ops sun4i_hdmi_ops = {
 659         .bind   = sun4i_hdmi_bind,
 660         .unbind = sun4i_hdmi_unbind,
 661 };
 662
 663 static int sun4i_hdmi_probe(struct platform_device *pdev)
 664 {
 665         return component_add(&pdev->dev, &sun4i_hdmi_ops);
 666 }
 667
 668 static int sun4i_hdmi_remove(struct platform_device *pdev)
 669 {
 670         component_del(&pdev->dev, &sun4i_hdmi_ops);
 671
 672         return 0;
 673 }
 674
 675 static const struct of_device_id sun4i_hdmi_of_table[] = {
 676         { .compatible = "allwinner,sun4i-a10-hdmi", .data = &sun4i_variant, },
 677         { .compatible = "allwinner,sun5i-a10s-hdmi", .data = &sun5i_variant, },
 678         { .compatible = "allwinner,sun6i-a31-hdmi", .data = &sun6i_variant, },
 679         { }
 680 };
 681 MODULE_DEVICE_TABLE(of, sun4i_hdmi_of_table);
 682
 683 static struct platform_driver sun4i_hdmi_driver = {
 684         .probe          = sun4i_hdmi_probe,
 685         .remove         = sun4i_hdmi_remove,
 686         .driver         = {
 687                 .name           = "sun4i-hdmi",
 688                 .of_match_table = sun4i_hdmi_of_table,
 689         },
 690 };
 691 module_platform_driver(sun4i_hdmi_driver);
 692
 693 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
 694 MODULE_DESCRIPTION("Allwinner A10 HDMI Driver");
 695 MODULE_LICENSE("GPL");