drivers/gpu/drm/rockchip/inno_hdmi.c

   1 /*
   2  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
   3  *    Zheng Yang <zhengyang@rock-chips.com>
   4  *    Yakir Yang <ykk@rock-chips.com>
   5  *
   6  * This software is licensed under the terms of the GNU General Public
   7  * License version 2, as published by the Free Software Foundation, and
   8  * may be copied, distributed, and modified under those terms.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/irq.h>
  17 #include <linux/clk.h>
  18 #include <linux/delay.h>
  19 #include <linux/err.h>
  20 #include <linux/hdmi.h>
  21 #include <linux/mfd/syscon.h>
  22 #include <linux/module.h>
  23 #include <linux/mutex.h>
  24 #include <linux/of_device.h>
  25
  26 #include <drm/drm_of.h>
  27 #include <drm/drmP.h>
  28 #include <drm/drm_atomic_helper.h>
  29 #include <drm/drm_crtc_helper.h>
  30 #include <drm/drm_edid.h>
  31
  32 #include "rockchip_drm_drv.h"
  33 #include "rockchip_drm_vop.h"
  34
  35 #include "inno_hdmi.h"
  36
  37 #define to_inno_hdmi(x) container_of(x, struct inno_hdmi, x)
  38
  39 struct hdmi_data_info {
  40         int vic;
  41         bool sink_is_hdmi;
  42         bool sink_has_audio;
  43         unsigned int enc_in_format;
  44         unsigned int enc_out_format;
  45         unsigned int colorimetry;
  46 };
  47
  48 struct inno_hdmi_i2c {
  49         struct i2c_adapter adap;
  50
  51         u8 ddc_addr;
  52         u8 segment_addr;
  53
  54         struct mutex lock;
  55         struct completion cmp;
  56 };
  57
  58 struct inno_hdmi {
  59         struct device *dev;
  60         struct drm_device *drm_dev;
  61
  62         int irq;
  63         struct clk *pclk;
  64         void __iomem *regs;
  65
  66         struct drm_connector    connector;
  67         struct drm_encoder      encoder;
  68
  69         struct inno_hdmi_i2c *i2c;
  70         struct i2c_adapter *ddc;
  71
  72         unsigned int tmds_rate;
  73
  74         struct hdmi_data_info   hdmi_data;
  75         struct drm_display_mode previous_mode;
  76 };
  77
  78 enum {
  79         CSC_ITU601_16_235_TO_RGB_0_255_8BIT,
  80         CSC_ITU601_0_255_TO_RGB_0_255_8BIT,
  81         CSC_ITU709_16_235_TO_RGB_0_255_8BIT,
  82         CSC_RGB_0_255_TO_ITU601_16_235_8BIT,
  83         CSC_RGB_0_255_TO_ITU709_16_235_8BIT,
  84         CSC_RGB_0_255_TO_RGB_16_235_8BIT,
  85 };
  86
  87 static const char coeff_csc[][24] = {
  88         /*
  89          * YUV2RGB:601 SD mode(Y[16:235], UV[16:240], RGB[0:255]):
  90          *   R = 1.164*Y + 1.596*V - 204
  91          *   G = 1.164*Y - 0.391*U - 0.813*V + 154
  92          *   B = 1.164*Y + 2.018*U - 258
  93          */
  94         {
  95                 0x04, 0xa7, 0x00, 0x00, 0x06, 0x62, 0x02, 0xcc,
  96                 0x04, 0xa7, 0x11, 0x90, 0x13, 0x40, 0x00, 0x9a,
  97                 0x04, 0xa7, 0x08, 0x12, 0x00, 0x00, 0x03, 0x02
  98         },
  99         /*
 100          * YUV2RGB:601 SD mode(YUV[0:255],RGB[0:255]):
 101          *   R = Y + 1.402*V - 248
 102          *   G = Y - 0.344*U - 0.714*V + 135
 103          *   B = Y + 1.772*U - 227
 104          */
 105         {
 106                 0x04, 0x00, 0x00, 0x00, 0x05, 0x9b, 0x02, 0xf8,
 107                 0x04, 0x00, 0x11, 0x60, 0x12, 0xdb, 0x00, 0x87,
 108                 0x04, 0x00, 0x07, 0x16, 0x00, 0x00, 0x02, 0xe3
 109         },
 110         /*
 111          * YUV2RGB:709 HD mode(Y[16:235],UV[16:240],RGB[0:255]):
 112          *   R = 1.164*Y + 1.793*V - 248
 113          *   G = 1.164*Y - 0.213*U - 0.534*V + 77
 114          *   B = 1.164*Y + 2.115*U - 289
 115          */
 116         {
 117                 0x04, 0xa7, 0x00, 0x00, 0x07, 0x2c, 0x02, 0xf8,
 118                 0x04, 0xa7, 0x10, 0xda, 0x12, 0x22, 0x00, 0x4d,
 119                 0x04, 0xa7, 0x08, 0x74, 0x00, 0x00, 0x03, 0x21
 120         },
 121
 122         /*
 123          * RGB2YUV:601 SD mode:
 124          *   Cb = -0.291G - 0.148R + 0.439B + 128
 125          *   Y  = 0.504G  + 0.257R + 0.098B + 16
 126          *   Cr = -0.368G + 0.439R - 0.071B + 128
 127          */
 128         {
 129                 0x11, 0x5f, 0x01, 0x82, 0x10, 0x23, 0x00, 0x80,
 130                 0x02, 0x1c, 0x00, 0xa1, 0x00, 0x36, 0x00, 0x1e,
 131                 0x11, 0x29, 0x10, 0x59, 0x01, 0x82, 0x00, 0x80
 132         },
 133         /*
 134          * RGB2YUV:709 HD mode:
 135          *   Cb = - 0.338G - 0.101R + 0.439B + 128
 136          *   Y  = 0.614G   + 0.183R + 0.062B + 16
 137          *   Cr = - 0.399G + 0.439R - 0.040B + 128
 138          */
 139         {
 140                 0x11, 0x98, 0x01, 0xc1, 0x10, 0x28, 0x00, 0x80,
 141                 0x02, 0x74, 0x00, 0xbb, 0x00, 0x3f, 0x00, 0x10,
 142                 0x11, 0x5a, 0x10, 0x67, 0x01, 0xc1, 0x00, 0x80
 143         },
 144         /*
 145          * RGB[0:255]2RGB[16:235]:
 146          *   R' = R x (235-16)/255 + 16;
 147          *   G' = G x (235-16)/255 + 16;
 148          *   B' = B x (235-16)/255 + 16;
 149          */
 150         {
 151                 0x00, 0x00, 0x03, 0x6F, 0x00, 0x00, 0x00, 0x10,
 152                 0x03, 0x6F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
 153                 0x00, 0x00, 0x00, 0x00, 0x03, 0x6F, 0x00, 0x10
 154         },
 155 };
 156
 157 static inline u8 hdmi_readb(struct inno_hdmi *hdmi, u16 offset)
 158 {
 159         return readl_relaxed(hdmi->regs + (offset) * 0x04);
 160 }
 161
 162 static inline void hdmi_writeb(struct inno_hdmi *hdmi, u16 offset, u32 val)
 163 {
 164         writel_relaxed(val, hdmi->regs + (offset) * 0x04);
 165 }
 166
 167 static inline void hdmi_modb(struct inno_hdmi *hdmi, u16 offset,
 168                              u32 msk, u32 val)
 169 {
 170         u8 temp = hdmi_readb(hdmi, offset) & ~msk;
 171
 172         temp |= val & msk;
 173         hdmi_writeb(hdmi, offset, temp);
 174 }
 175
 176 static void inno_hdmi_i2c_init(struct inno_hdmi *hdmi)
 177 {
 178         int ddc_bus_freq;
 179
 180         ddc_bus_freq = (hdmi->tmds_rate >> 2) / HDMI_SCL_RATE;
 181
 182         hdmi_writeb(hdmi, DDC_BUS_FREQ_L, ddc_bus_freq & 0xFF);
 183         hdmi_writeb(hdmi, DDC_BUS_FREQ_H, (ddc_bus_freq >> 8) & 0xFF);
 184
 185         /* Clear the EDID interrupt flag and mute the interrupt */
 186         hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0);
 187         hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
 188 }
 189
 190 static void inno_hdmi_sys_power(struct inno_hdmi *hdmi, bool enable)
 191 {
 192         if (enable)
 193                 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_ON);
 194         else
 195                 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_OFF);
 196 }
 197
 198 static void inno_hdmi_set_pwr_mode(struct inno_hdmi *hdmi, int mode)
 199 {
 200         switch (mode) {
 201         case NORMAL:
 202                 inno_hdmi_sys_power(hdmi, false);
 203
 204                 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x6f);
 205                 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0xbb);
 206
 207                 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15);
 208                 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x14);
 209                 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x10);
 210                 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x0f);
 211                 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x00);
 212                 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x01);
 213
 214                 inno_hdmi_sys_power(hdmi, true);
 215                 break;
 216
 217         case LOWER_PWR:
 218                 inno_hdmi_sys_power(hdmi, false);
 219                 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0x00);
 220                 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x00);
 221                 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x00);
 222                 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15);
 223
 224                 break;
 225
 226         default:
 227                 DRM_DEV_ERROR(hdmi->dev, "Unknown power mode %d\n", mode);
 228         }
 229 }
 230
 231 static void inno_hdmi_reset(struct inno_hdmi *hdmi)
 232 {
 233         u32 val;
 234         u32 msk;
 235
 236         hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_DIGITAL, v_NOT_RST_DIGITAL);
 237         udelay(100);
 238
 239         hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_ANALOG, v_NOT_RST_ANALOG);
 240         udelay(100);
 241
 242         msk = m_REG_CLK_INV | m_REG_CLK_SOURCE | m_POWER | m_INT_POL;
 243         val = v_REG_CLK_INV | v_REG_CLK_SOURCE_SYS | v_PWR_ON | v_INT_POL_HIGH;
 244         hdmi_modb(hdmi, HDMI_SYS_CTRL, msk, val);
 245
 246         inno_hdmi_set_pwr_mode(hdmi, NORMAL);
 247 }
 248
 249 static int inno_hdmi_upload_frame(struct inno_hdmi *hdmi, int setup_rc,
 250                                   union hdmi_infoframe *frame, u32 frame_index,
 251                                   u32 mask, u32 disable, u32 enable)
 252 {
 253         if (mask)
 254                 hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, disable);
 255
 256         hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_BUF_INDEX, frame_index);
 257
 258         if (setup_rc >= 0) {
 259                 u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE];
 260                 ssize_t rc, i;
 261
 262                 rc = hdmi_infoframe_pack(frame, packed_frame,
 263                                          sizeof(packed_frame));
 264                 if (rc < 0)
 265                         return rc;
 266
 267                 for (i = 0; i < rc; i++)
 268                         hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_ADDR + i,
 269                                     packed_frame[i]);
 270
 271                 if (mask)
 272                         hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, enable);
 273         }
 274
 275         return setup_rc;
 276 }
 277
 278 static int inno_hdmi_config_video_vsi(struct inno_hdmi *hdmi,
 279                                       struct drm_display_mode *mode)
 280 {
 281         union hdmi_infoframe frame;
 282         int rc;
 283
 284         rc = drm_hdmi_vendor_infoframe_from_display_mode(&frame.vendor.hdmi,
 285                                                          mode);
 286
 287         return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_VSI,
 288                 m_PACKET_VSI_EN, v_PACKET_VSI_EN(0), v_PACKET_VSI_EN(1));
 289 }
 290
 291 static int inno_hdmi_config_video_avi(struct inno_hdmi *hdmi,
 292                                       struct drm_display_mode *mode)
 293 {
 294         union hdmi_infoframe frame;
 295         int rc;
 296
 297         rc = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, mode, false);
 298
 299         if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV444)
 300                 frame.avi.colorspace = HDMI_COLORSPACE_YUV444;
 301         else if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV422)
 302                 frame.avi.colorspace = HDMI_COLORSPACE_YUV422;
 303         else
 304                 frame.avi.colorspace = HDMI_COLORSPACE_RGB;
 305
 306         return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_AVI, 0, 0, 0);
 307 }
 308
 309 static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi)
 310 {
 311         struct hdmi_data_info *data = &hdmi->hdmi_data;
 312         int c0_c2_change = 0;
 313         int csc_enable = 0;
 314         int csc_mode = 0;
 315         int auto_csc = 0;
 316         int value;
 317         int i;
 318
 319         /* Input video mode is SDR RGB24bit, data enable signal from external */
 320         hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL1, v_DE_EXTERNAL |
 321                     v_VIDEO_INPUT_FORMAT(VIDEO_INPUT_SDR_RGB444));
 322
 323         /* Input color hardcode to RGB, and output color hardcode to RGB888 */
 324         value = v_VIDEO_INPUT_BITS(VIDEO_INPUT_8BITS) |
 325                 v_VIDEO_OUTPUT_COLOR(0) |
 326                 v_VIDEO_INPUT_CSP(0);
 327         hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL2, value);
 328
 329         if (data->enc_in_format == data->enc_out_format) {
 330                 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) ||
 331                     (data->enc_in_format >= HDMI_COLORSPACE_YUV444)) {
 332                         value = v_SOF_DISABLE | v_COLOR_DEPTH_NOT_INDICATED(1);
 333                         hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value);
 334
 335                         hdmi_modb(hdmi, HDMI_VIDEO_CONTRL,
 336                                   m_VIDEO_AUTO_CSC | m_VIDEO_C0_C2_SWAP,
 337                                   v_VIDEO_AUTO_CSC(AUTO_CSC_DISABLE) |
 338                                   v_VIDEO_C0_C2_SWAP(C0_C2_CHANGE_DISABLE));
 339                         return 0;
 340                 }
 341         }
 342
 343         if (data->colorimetry == HDMI_COLORIMETRY_ITU_601) {
 344                 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) &&
 345                     (data->enc_out_format == HDMI_COLORSPACE_YUV444)) {
 346                         csc_mode = CSC_RGB_0_255_TO_ITU601_16_235_8BIT;
 347                         auto_csc = AUTO_CSC_DISABLE;
 348                         c0_c2_change = C0_C2_CHANGE_DISABLE;
 349                         csc_enable = v_CSC_ENABLE;
 350                 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) &&
 351                            (data->enc_out_format == HDMI_COLORSPACE_RGB)) {
 352                         csc_mode = CSC_ITU601_16_235_TO_RGB_0_255_8BIT;
 353                         auto_csc = AUTO_CSC_ENABLE;
 354                         c0_c2_change = C0_C2_CHANGE_DISABLE;
 355                         csc_enable = v_CSC_DISABLE;
 356                 }
 357         } else {
 358                 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) &&
 359                     (data->enc_out_format == HDMI_COLORSPACE_YUV444)) {
 360                         csc_mode = CSC_RGB_0_255_TO_ITU709_16_235_8BIT;
 361                         auto_csc = AUTO_CSC_DISABLE;
 362                         c0_c2_change = C0_C2_CHANGE_DISABLE;
 363                         csc_enable = v_CSC_ENABLE;
 364                 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) &&
 365                            (data->enc_out_format == HDMI_COLORSPACE_RGB)) {
 366                         csc_mode = CSC_ITU709_16_235_TO_RGB_0_255_8BIT;
 367                         auto_csc = AUTO_CSC_ENABLE;
 368                         c0_c2_change = C0_C2_CHANGE_DISABLE;
 369                         csc_enable = v_CSC_DISABLE;
 370                 }
 371         }
 372
 373         for (i = 0; i < 24; i++)
 374                 hdmi_writeb(hdmi, HDMI_VIDEO_CSC_COEF + i,
 375                             coeff_csc[csc_mode][i]);
 376
 377         value = v_SOF_DISABLE | csc_enable | v_COLOR_DEPTH_NOT_INDICATED(1);
 378         hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value);
 379         hdmi_modb(hdmi, HDMI_VIDEO_CONTRL, m_VIDEO_AUTO_CSC |
 380                   m_VIDEO_C0_C2_SWAP, v_VIDEO_AUTO_CSC(auto_csc) |
 381                   v_VIDEO_C0_C2_SWAP(c0_c2_change));
 382
 383         return 0;
 384 }
 385
 386 static int inno_hdmi_config_video_timing(struct inno_hdmi *hdmi,
 387                                          struct drm_display_mode *mode)
 388 {
 389         int value;
 390
 391         /* Set detail external video timing polarity and interlace mode */
 392         value = v_EXTERANL_VIDEO(1);
 393         value |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
 394                  v_HSYNC_POLARITY(1) : v_HSYNC_POLARITY(0);
 395         value |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
 396                  v_VSYNC_POLARITY(1) : v_VSYNC_POLARITY(0);
 397         value |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
 398                  v_INETLACE(1) : v_INETLACE(0);
 399         hdmi_writeb(hdmi, HDMI_VIDEO_TIMING_CTL, value);
 400
 401         /* Set detail external video timing */
 402         value = mode->htotal;
 403         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_L, value & 0xFF);
 404         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_H, (value >> 8) & 0xFF);
 405
 406         value = mode->htotal - mode->hdisplay;
 407         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_L, value & 0xFF);
 408         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_H, (value >> 8) & 0xFF);
 409
 410         value = mode->hsync_start - mode->hdisplay;
 411         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_L, value & 0xFF);
 412         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_H, (value >> 8) & 0xFF);
 413
 414         value = mode->hsync_end - mode->hsync_start;
 415         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_L, value & 0xFF);
 416         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_H, (value >> 8) & 0xFF);
 417
 418         value = mode->vtotal;
 419         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_L, value & 0xFF);
 420         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_H, (value >> 8) & 0xFF);
 421
 422         value = mode->vtotal - mode->vdisplay;
 423         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VBLANK, value & 0xFF);
 424
 425         value = mode->vsync_start - mode->vdisplay;
 426         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDELAY, value & 0xFF);
 427
 428         value = mode->vsync_end - mode->vsync_start;
 429         hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDURATION, value & 0xFF);
 430
 431         hdmi_writeb(hdmi, HDMI_PHY_PRE_DIV_RATIO, 0x1e);
 432         hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_LOW, 0x2c);
 433         hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_HIGH, 0x01);
 434
 435         return 0;
 436 }
 437
 438 static int inno_hdmi_setup(struct inno_hdmi *hdmi,
 439                            struct drm_display_mode *mode)
 440 {
 441         hdmi->hdmi_data.vic = drm_match_cea_mode(mode);
 442
 443         hdmi->hdmi_data.enc_in_format = HDMI_COLORSPACE_RGB;
 444         hdmi->hdmi_data.enc_out_format = HDMI_COLORSPACE_RGB;
 445
 446         if ((hdmi->hdmi_data.vic == 6) || (hdmi->hdmi_data.vic == 7) ||
 447             (hdmi->hdmi_data.vic == 21) || (hdmi->hdmi_data.vic == 22) ||
 448             (hdmi->hdmi_data.vic == 2) || (hdmi->hdmi_data.vic == 3) ||
 449             (hdmi->hdmi_data.vic == 17) || (hdmi->hdmi_data.vic == 18))
 450                 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601;
 451         else
 452                 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709;
 453
 454         /* Mute video and audio output */
 455         hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
 456                   v_AUDIO_MUTE(1) | v_VIDEO_MUTE(1));
 457
 458         /* Set HDMI Mode */
 459         hdmi_writeb(hdmi, HDMI_HDCP_CTRL,
 460                     v_HDMI_DVI(hdmi->hdmi_data.sink_is_hdmi));
 461
 462         inno_hdmi_config_video_timing(hdmi, mode);
 463
 464         inno_hdmi_config_video_csc(hdmi);
 465
 466         if (hdmi->hdmi_data.sink_is_hdmi) {
 467                 inno_hdmi_config_video_avi(hdmi, mode);
 468                 inno_hdmi_config_video_vsi(hdmi, mode);
 469         }
 470
 471         /*
 472          * When IP controller have configured to an accurate video
 473          * timing, then the TMDS clock source would be switched to
 474          * DCLK_LCDC, so we need to init the TMDS rate to mode pixel
 475          * clock rate, and reconfigure the DDC clock.
 476          */
 477         hdmi->tmds_rate = mode->clock * 1000;
 478         inno_hdmi_i2c_init(hdmi);
 479
 480         /* Unmute video and audio output */
 481         hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
 482                   v_AUDIO_MUTE(0) | v_VIDEO_MUTE(0));
 483
 484         return 0;
 485 }
 486
 487 static void inno_hdmi_encoder_mode_set(struct drm_encoder *encoder,
 488                                        struct drm_display_mode *mode,
 489                                        struct drm_display_mode *adj_mode)
 490 {
 491         struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
 492
 493         inno_hdmi_setup(hdmi, adj_mode);
 494
 495         /* Store the display mode for plugin/DPMS poweron events */
 496         memcpy(&hdmi->previous_mode, adj_mode, sizeof(hdmi->previous_mode));
 497 }
 498
 499 static void inno_hdmi_encoder_enable(struct drm_encoder *encoder)
 500 {
 501         struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
 502
 503         inno_hdmi_set_pwr_mode(hdmi, NORMAL);
 504 }
 505
 506 static void inno_hdmi_encoder_disable(struct drm_encoder *encoder)
 507 {
 508         struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
 509
 510         inno_hdmi_set_pwr_mode(hdmi, LOWER_PWR);
 511 }
 512
 513 static bool inno_hdmi_encoder_mode_fixup(struct drm_encoder *encoder,
 514                                          const struct drm_display_mode *mode,
 515                                          struct drm_display_mode *adj_mode)
 516 {
 517         return true;
 518 }
 519
 520 static int
 521 inno_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
 522                                struct drm_crtc_state *crtc_state,
 523                                struct drm_connector_state *conn_state)
 524 {
 525         struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
 526
 527         s->output_mode = ROCKCHIP_OUT_MODE_P888;
 528         s->output_type = DRM_MODE_CONNECTOR_HDMIA;
 529
 530         return 0;
 531 }
 532
 533 static struct drm_encoder_helper_funcs inno_hdmi_encoder_helper_funcs = {
 534         .enable     = inno_hdmi_encoder_enable,
 535         .disable    = inno_hdmi_encoder_disable,
 536         .mode_fixup = inno_hdmi_encoder_mode_fixup,
 537         .mode_set   = inno_hdmi_encoder_mode_set,
 538         .atomic_check = inno_hdmi_encoder_atomic_check,
 539 };
 540
 541 static struct drm_encoder_funcs inno_hdmi_encoder_funcs = {
 542         .destroy = drm_encoder_cleanup,
 543 };
 544
 545 static enum drm_connector_status
 546 inno_hdmi_connector_detect(struct drm_connector *connector, bool force)
 547 {
 548         struct inno_hdmi *hdmi = to_inno_hdmi(connector);
 549
 550         return (hdmi_readb(hdmi, HDMI_STATUS) & m_HOTPLUG) ?
 551                 connector_status_connected : connector_status_disconnected;
 552 }
 553
 554 static int inno_hdmi_connector_get_modes(struct drm_connector *connector)
 555 {
 556         struct inno_hdmi *hdmi = to_inno_hdmi(connector);
 557         struct edid *edid;
 558         int ret = 0;
 559
 560         if (!hdmi->ddc)
 561                 return 0;
 562
 563         edid = drm_get_edid(connector, hdmi->ddc);
 564         if (edid) {
 565                 hdmi->hdmi_data.sink_is_hdmi = drm_detect_hdmi_monitor(edid);
 566                 hdmi->hdmi_data.sink_has_audio = drm_detect_monitor_audio(edid);
 567                 drm_mode_connector_update_edid_property(connector, edid);
 568                 ret = drm_add_edid_modes(connector, edid);
 569                 kfree(edid);
 570         }
 571
 572         return ret;
 573 }
 574
 575 static enum drm_mode_status
 576 inno_hdmi_connector_mode_valid(struct drm_connector *connector,
 577                                struct drm_display_mode *mode)
 578 {
 579         return MODE_OK;
 580 }
 581
 582 static int
 583 inno_hdmi_probe_single_connector_modes(struct drm_connector *connector,
 584                                        uint32_t maxX, uint32_t maxY)
 585 {
 586         return drm_helper_probe_single_connector_modes(connector, 1920, 1080);
 587 }
 588
 589 static void inno_hdmi_connector_destroy(struct drm_connector *connector)
 590 {
 591         drm_connector_unregister(connector);
 592         drm_connector_cleanup(connector);
 593 }
 594
 595 static const struct drm_connector_funcs inno_hdmi_connector_funcs = {
 596         .fill_modes = inno_hdmi_probe_single_connector_modes,
 597         .detect = inno_hdmi_connector_detect,
 598         .destroy = inno_hdmi_connector_destroy,
 599         .reset = drm_atomic_helper_connector_reset,
 600         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 601         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 602 };
 603
 604 static struct drm_connector_helper_funcs inno_hdmi_connector_helper_funcs = {
 605         .get_modes = inno_hdmi_connector_get_modes,
 606         .mode_valid = inno_hdmi_connector_mode_valid,
 607 };
 608
 609 static int inno_hdmi_register(struct drm_device *drm, struct inno_hdmi *hdmi)
 610 {
 611         struct drm_encoder *encoder = &hdmi->encoder;
 612         struct device *dev = hdmi->dev;
 613
 614         encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
 615
 616         /*
 617          * If we failed to find the CRTC(s) which this encoder is
 618          * supposed to be connected to, it's because the CRTC has
 619          * not been registered yet.  Defer probing, and hope that
 620          * the required CRTC is added later.
 621          */
 622         if (encoder->possible_crtcs == 0)
 623                 return -EPROBE_DEFER;
 624
 625         drm_encoder_helper_add(encoder, &inno_hdmi_encoder_helper_funcs);
 626         drm_encoder_init(drm, encoder, &inno_hdmi_encoder_funcs,
 627                          DRM_MODE_ENCODER_TMDS, NULL);
 628
 629         hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
 630
 631         drm_connector_helper_add(&hdmi->connector,
 632                                  &inno_hdmi_connector_helper_funcs);
 633         drm_connector_init(drm, &hdmi->connector, &inno_hdmi_connector_funcs,
 634                            DRM_MODE_CONNECTOR_HDMIA);
 635
 636         drm_mode_connector_attach_encoder(&hdmi->connector, encoder);
 637
 638         return 0;
 639 }
 640
 641 static irqreturn_t inno_hdmi_i2c_irq(struct inno_hdmi *hdmi)
 642 {
 643         struct inno_hdmi_i2c *i2c = hdmi->i2c;
 644         u8 stat;
 645
 646         stat = hdmi_readb(hdmi, HDMI_INTERRUPT_STATUS1);
 647         if (!(stat & m_INT_EDID_READY))
 648                 return IRQ_NONE;
 649
 650         /* Clear HDMI EDID interrupt flag */
 651         hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
 652
 653         complete(&i2c->cmp);
 654
 655         return IRQ_HANDLED;
 656 }
 657
 658 static irqreturn_t inno_hdmi_hardirq(int irq, void *dev_id)
 659 {
 660         struct inno_hdmi *hdmi = dev_id;
 661         irqreturn_t ret = IRQ_NONE;
 662         u8 interrupt;
 663
 664         if (hdmi->i2c)
 665                 ret = inno_hdmi_i2c_irq(hdmi);
 666
 667         interrupt = hdmi_readb(hdmi, HDMI_STATUS);
 668         if (interrupt & m_INT_HOTPLUG) {
 669                 hdmi_modb(hdmi, HDMI_STATUS, m_INT_HOTPLUG, m_INT_HOTPLUG);
 670                 ret = IRQ_WAKE_THREAD;
 671         }
 672
 673         return ret;
 674 }
 675
 676 static irqreturn_t inno_hdmi_irq(int irq, void *dev_id)
 677 {
 678         struct inno_hdmi *hdmi = dev_id;
 679
 680         drm_helper_hpd_irq_event(hdmi->connector.dev);
 681
 682         return IRQ_HANDLED;
 683 }
 684
 685 static int inno_hdmi_i2c_read(struct inno_hdmi *hdmi, struct i2c_msg *msgs)
 686 {
 687         int length = msgs->len;
 688         u8 *buf = msgs->buf;
 689         int ret;
 690
 691         ret = wait_for_completion_timeout(&hdmi->i2c->cmp, HZ / 10);
 692         if (!ret)
 693                 return -EAGAIN;
 694
 695         while (length--)
 696                 *buf++ = hdmi_readb(hdmi, HDMI_EDID_FIFO_ADDR);
 697
 698         return 0;
 699 }
 700
 701 static int inno_hdmi_i2c_write(struct inno_hdmi *hdmi, struct i2c_msg *msgs)
 702 {
 703         /*
 704          * The DDC module only support read EDID message, so
 705          * we assume that each word write to this i2c adapter
 706          * should be the offset of EDID word address.
 707          */
 708         if ((msgs->len != 1) ||
 709             ((msgs->addr != DDC_ADDR) && (msgs->addr != DDC_SEGMENT_ADDR)))
 710                 return -EINVAL;
 711
 712         reinit_completion(&hdmi->i2c->cmp);
 713
 714         if (msgs->addr == DDC_SEGMENT_ADDR)
 715                 hdmi->i2c->segment_addr = msgs->buf[0];
 716         if (msgs->addr == DDC_ADDR)
 717                 hdmi->i2c->ddc_addr = msgs->buf[0];
 718
 719         /* Set edid fifo first addr */
 720         hdmi_writeb(hdmi, HDMI_EDID_FIFO_OFFSET, 0x00);
 721
 722         /* Set edid word address 0x00/0x80 */
 723         hdmi_writeb(hdmi, HDMI_EDID_WORD_ADDR, hdmi->i2c->ddc_addr);
 724
 725         /* Set edid segment pointer */
 726         hdmi_writeb(hdmi, HDMI_EDID_SEGMENT_POINTER, hdmi->i2c->segment_addr);
 727
 728         return 0;
 729 }
 730
 731 static int inno_hdmi_i2c_xfer(struct i2c_adapter *adap,
 732                               struct i2c_msg *msgs, int num)
 733 {
 734         struct inno_hdmi *hdmi = i2c_get_adapdata(adap);
 735         struct inno_hdmi_i2c *i2c = hdmi->i2c;
 736         int i, ret = 0;
 737
 738         mutex_lock(&i2c->lock);
 739
 740         /* Clear the EDID interrupt flag and unmute the interrupt */
 741         hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, m_INT_EDID_READY);
 742         hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
 743
 744         for (i = 0; i < num; i++) {
 745                 DRM_DEV_DEBUG(hdmi->dev,
 746                               "xfer: num: %d/%d, len: %d, flags: %#x\n",
 747                               i + 1, num, msgs[i].len, msgs[i].flags);
 748
 749                 if (msgs[i].flags & I2C_M_RD)
 750                         ret = inno_hdmi_i2c_read(hdmi, &msgs[i]);
 751                 else
 752                         ret = inno_hdmi_i2c_write(hdmi, &msgs[i]);
 753
 754                 if (ret < 0)
 755                         break;
 756         }
 757
 758         if (!ret)
 759                 ret = num;
 760
 761         /* Mute HDMI EDID interrupt */
 762         hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0);
 763
 764         mutex_unlock(&i2c->lock);
 765
 766         return ret;
 767 }
 768
 769 static u32 inno_hdmi_i2c_func(struct i2c_adapter *adapter)
 770 {
 771         return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
 772 }
 773
 774 static const struct i2c_algorithm inno_hdmi_algorithm = {
 775         .master_xfer    = inno_hdmi_i2c_xfer,
 776         .functionality  = inno_hdmi_i2c_func,
 777 };
 778
 779 static struct i2c_adapter *inno_hdmi_i2c_adapter(struct inno_hdmi *hdmi)
 780 {
 781         struct i2c_adapter *adap;
 782         struct inno_hdmi_i2c *i2c;
 783         int ret;
 784
 785         i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL);
 786         if (!i2c)
 787                 return ERR_PTR(-ENOMEM);
 788
 789         mutex_init(&i2c->lock);
 790         init_completion(&i2c->cmp);
 791
 792         adap = &i2c->adap;
 793         adap->class = I2C_CLASS_DDC;
 794         adap->owner = THIS_MODULE;
 795         adap->dev.parent = hdmi->dev;
 796         adap->dev.of_node = hdmi->dev->of_node;
 797         adap->algo = &inno_hdmi_algorithm;
 798         strlcpy(adap->name, "Inno HDMI", sizeof(adap->name));
 799         i2c_set_adapdata(adap, hdmi);
 800
 801         ret = i2c_add_adapter(adap);
 802         if (ret) {
 803                 dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name);
 804                 devm_kfree(hdmi->dev, i2c);
 805                 return ERR_PTR(ret);
 806         }
 807
 808         hdmi->i2c = i2c;
 809
 810         DRM_DEV_INFO(hdmi->dev, "registered %s I2C bus driver\n", adap->name);
 811
 812         return adap;
 813 }
 814
 815 static int inno_hdmi_bind(struct device *dev, struct device *master,
 816                                  void *data)
 817 {
 818         struct platform_device *pdev = to_platform_device(dev);
 819         struct drm_device *drm = data;
 820         struct inno_hdmi *hdmi;
 821         struct resource *iores;
 822         int irq;
 823         int ret;
 824
 825         hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
 826         if (!hdmi)
 827                 return -ENOMEM;
 828
 829         hdmi->dev = dev;
 830         hdmi->drm_dev = drm;
 831
 832         iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 833         if (!iores)
 834                 return -ENXIO;
 835
 836         hdmi->regs = devm_ioremap_resource(dev, iores);
 837         if (IS_ERR(hdmi->regs))
 838                 return PTR_ERR(hdmi->regs);
 839
 840         hdmi->pclk = devm_clk_get(hdmi->dev, "pclk");
 841         if (IS_ERR(hdmi->pclk)) {
 842                 DRM_DEV_ERROR(hdmi->dev, "Unable to get HDMI pclk clk\n");
 843                 return PTR_ERR(hdmi->pclk);
 844         }
 845
 846         ret = clk_prepare_enable(hdmi->pclk);
 847         if (ret) {
 848                 DRM_DEV_ERROR(hdmi->dev,
 849                               "Cannot enable HDMI pclk clock: %d\n", ret);
 850                 return ret;
 851         }
 852
 853         irq = platform_get_irq(pdev, 0);
 854         if (irq < 0)
 855                 return irq;
 856
 857         inno_hdmi_reset(hdmi);
 858
 859         hdmi->ddc = inno_hdmi_i2c_adapter(hdmi);
 860         if (IS_ERR(hdmi->ddc)) {
 861                 ret = PTR_ERR(hdmi->ddc);
 862                 hdmi->ddc = NULL;
 863                 return ret;
 864         }
 865
 866         /*
 867          * When IP controller haven't configured to an accurate video
 868          * timing, then the TMDS clock source would be switched to
 869          * PCLK_HDMI, so we need to init the TMDS rate to PCLK rate,
 870          * and reconfigure the DDC clock.
 871          */
 872         hdmi->tmds_rate = clk_get_rate(hdmi->pclk);
 873         inno_hdmi_i2c_init(hdmi);
 874
 875         ret = inno_hdmi_register(drm, hdmi);
 876         if (ret)
 877                 return ret;
 878
 879         dev_set_drvdata(dev, hdmi);
 880
 881         /* Unmute hotplug interrupt */
 882         hdmi_modb(hdmi, HDMI_STATUS, m_MASK_INT_HOTPLUG, v_MASK_INT_HOTPLUG(1));
 883
 884         ret = devm_request_threaded_irq(dev, irq, inno_hdmi_hardirq,
 885                                         inno_hdmi_irq, IRQF_SHARED,
 886                                         dev_name(dev), hdmi);
 887
 888         return ret;
 889 }
 890
 891 static void inno_hdmi_unbind(struct device *dev, struct device *master,
 892                              void *data)
 893 {
 894         struct inno_hdmi *hdmi = dev_get_drvdata(dev);
 895
 896         hdmi->connector.funcs->destroy(&hdmi->connector);
 897         hdmi->encoder.funcs->destroy(&hdmi->encoder);
 898
 899         clk_disable_unprepare(hdmi->pclk);
 900         i2c_put_adapter(hdmi->ddc);
 901 }
 902
 903 static const struct component_ops inno_hdmi_ops = {
 904         .bind   = inno_hdmi_bind,
 905         .unbind = inno_hdmi_unbind,
 906 };
 907
 908 static int inno_hdmi_probe(struct platform_device *pdev)
 909 {
 910         return component_add(&pdev->dev, &inno_hdmi_ops);
 911 }
 912
 913 static int inno_hdmi_remove(struct platform_device *pdev)
 914 {
 915         component_del(&pdev->dev, &inno_hdmi_ops);
 916
 917         return 0;
 918 }
 919
 920 static const struct of_device_id inno_hdmi_dt_ids[] = {
 921         { .compatible = "rockchip,rk3036-inno-hdmi",
 922         },
 923         {},
 924 };
 925 MODULE_DEVICE_TABLE(of, inno_hdmi_dt_ids);
 926
 927 struct platform_driver inno_hdmi_driver = {
 928         .probe  = inno_hdmi_probe,
 929         .remove = inno_hdmi_remove,
 930         .driver = {
 931                 .name = "innohdmi-rockchip",
 932                 .of_match_table = inno_hdmi_dt_ids,
 933         },
 934 };