qemu/hw/display/xlnx_dp.c
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   1/*
   2 * Xilinx Display Port
   3 *
   4 *  Copyright (C) 2015 : GreenSocs Ltd
   5 *      http://www.greensocs.com/ , email: info@greensocs.com
   6 *
   7 *  Developed by :
   8 *  Frederic Konrad   <fred.konrad@greensocs.com>
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License as published by
  12 * the Free Software Foundation, either version 2 of the License, or
  13 * (at your option)any later version.
  14 *
  15 * This program is distributed in the hope that it will be useful,
  16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 * GNU General Public License for more details.
  19 *
  20 * You should have received a copy of the GNU General Public License along
  21 * with this program; if not, see <http://www.gnu.org/licenses/>.
  22 *
  23 */
  24
  25#include "qemu/osdep.h"
  26#include "qapi/error.h"
  27#include "qemu/error-report.h"
  28#include "qemu/log.h"
  29#include "qemu/module.h"
  30#include "hw/display/xlnx_dp.h"
  31#include "hw/irq.h"
  32#include "migration/vmstate.h"
  33
  34#ifndef DEBUG_DP
  35#define DEBUG_DP 0
  36#endif
  37
  38#define DPRINTF(fmt, ...) do {                                                 \
  39    if (DEBUG_DP) {                                                            \
  40        qemu_log("xlnx_dp: " fmt , ## __VA_ARGS__);                            \
  41    }                                                                          \
  42} while (0)
  43
  44/*
  45 * Register offset for DP.
  46 */
  47#define DP_LINK_BW_SET                      (0x0000 >> 2)
  48#define DP_LANE_COUNT_SET                   (0x0004 >> 2)
  49#define DP_ENHANCED_FRAME_EN                (0x0008 >> 2)
  50#define DP_TRAINING_PATTERN_SET             (0x000C >> 2)
  51#define DP_LINK_QUAL_PATTERN_SET            (0x0010 >> 2)
  52#define DP_SCRAMBLING_DISABLE               (0x0014 >> 2)
  53#define DP_DOWNSPREAD_CTRL                  (0x0018 >> 2)
  54#define DP_SOFTWARE_RESET                   (0x001C >> 2)
  55#define DP_TRANSMITTER_ENABLE               (0x0080 >> 2)
  56#define DP_MAIN_STREAM_ENABLE               (0x0084 >> 2)
  57#define DP_FORCE_SCRAMBLER_RESET            (0x00C0 >> 2)
  58#define DP_VERSION_REGISTER                 (0x00F8 >> 2)
  59#define DP_CORE_ID                          (0x00FC >> 2)
  60
  61#define DP_AUX_COMMAND_REGISTER             (0x0100 >> 2)
  62#define AUX_ADDR_ONLY_MASK                  (0x1000)
  63#define AUX_COMMAND_MASK                    (0x0F00)
  64#define AUX_COMMAND_SHIFT                   (8)
  65#define AUX_COMMAND_NBYTES                  (0x000F)
  66
  67#define DP_AUX_WRITE_FIFO                   (0x0104 >> 2)
  68#define DP_AUX_ADDRESS                      (0x0108 >> 2)
  69#define DP_AUX_CLOCK_DIVIDER                (0x010C >> 2)
  70#define DP_TX_USER_FIFO_OVERFLOW            (0x0110 >> 2)
  71#define DP_INTERRUPT_SIGNAL_STATE           (0x0130 >> 2)
  72#define DP_AUX_REPLY_DATA                   (0x0134 >> 2)
  73#define DP_AUX_REPLY_CODE                   (0x0138 >> 2)
  74#define DP_AUX_REPLY_COUNT                  (0x013C >> 2)
  75#define DP_REPLY_DATA_COUNT                 (0x0148 >> 2)
  76#define DP_REPLY_STATUS                     (0x014C >> 2)
  77#define DP_HPD_DURATION                     (0x0150 >> 2)
  78#define DP_MAIN_STREAM_HTOTAL               (0x0180 >> 2)
  79#define DP_MAIN_STREAM_VTOTAL               (0x0184 >> 2)
  80#define DP_MAIN_STREAM_POLARITY             (0x0188 >> 2)
  81#define DP_MAIN_STREAM_HSWIDTH              (0x018C >> 2)
  82#define DP_MAIN_STREAM_VSWIDTH              (0x0190 >> 2)
  83#define DP_MAIN_STREAM_HRES                 (0x0194 >> 2)
  84#define DP_MAIN_STREAM_VRES                 (0x0198 >> 2)
  85#define DP_MAIN_STREAM_HSTART               (0x019C >> 2)
  86#define DP_MAIN_STREAM_VSTART               (0x01A0 >> 2)
  87#define DP_MAIN_STREAM_MISC0                (0x01A4 >> 2)
  88#define DP_MAIN_STREAM_MISC1                (0x01A8 >> 2)
  89#define DP_MAIN_STREAM_M_VID                (0x01AC >> 2)
  90#define DP_MSA_TRANSFER_UNIT_SIZE           (0x01B0 >> 2)
  91#define DP_MAIN_STREAM_N_VID                (0x01B4 >> 2)
  92#define DP_USER_DATA_COUNT_PER_LANE         (0x01BC >> 2)
  93#define DP_MIN_BYTES_PER_TU                 (0x01C4 >> 2)
  94#define DP_FRAC_BYTES_PER_TU                (0x01C8 >> 2)
  95#define DP_INIT_WAIT                        (0x01CC >> 2)
  96#define DP_PHY_RESET                        (0x0200 >> 2)
  97#define DP_PHY_VOLTAGE_DIFF_LANE_0          (0x0220 >> 2)
  98#define DP_PHY_VOLTAGE_DIFF_LANE_1          (0x0224 >> 2)
  99#define DP_TRANSMIT_PRBS7                   (0x0230 >> 2)
 100#define DP_PHY_CLOCK_SELECT                 (0x0234 >> 2)
 101#define DP_TX_PHY_POWER_DOWN                (0x0238 >> 2)
 102#define DP_PHY_PRECURSOR_LANE_0             (0x023C >> 2)
 103#define DP_PHY_PRECURSOR_LANE_1             (0x0240 >> 2)
 104#define DP_PHY_POSTCURSOR_LANE_0            (0x024C >> 2)
 105#define DP_PHY_POSTCURSOR_LANE_1            (0x0250 >> 2)
 106#define DP_PHY_STATUS                       (0x0280 >> 2)
 107
 108#define DP_TX_AUDIO_CONTROL                 (0x0300 >> 2)
 109#define DP_TX_AUD_CTRL                      (1)
 110
 111#define DP_TX_AUDIO_CHANNELS                (0x0304 >> 2)
 112#define DP_TX_AUDIO_INFO_DATA(n)            ((0x0308 + 4 * n) >> 2)
 113#define DP_TX_M_AUD                         (0x0328 >> 2)
 114#define DP_TX_N_AUD                         (0x032C >> 2)
 115#define DP_TX_AUDIO_EXT_DATA(n)             ((0x0330 + 4 * n) >> 2)
 116#define DP_INT_STATUS                       (0x03A0 >> 2)
 117#define DP_INT_MASK                         (0x03A4 >> 2)
 118#define DP_INT_EN                           (0x03A8 >> 2)
 119#define DP_INT_DS                           (0x03AC >> 2)
 120
 121/*
 122 * Registers offset for Audio Video Buffer configuration.
 123 */
 124#define V_BLEND_OFFSET                      (0xA000)
 125#define V_BLEND_BG_CLR_0                    (0x0000 >> 2)
 126#define V_BLEND_BG_CLR_1                    (0x0004 >> 2)
 127#define V_BLEND_BG_CLR_2                    (0x0008 >> 2)
 128#define V_BLEND_SET_GLOBAL_ALPHA_REG        (0x000C >> 2)
 129#define V_BLEND_OUTPUT_VID_FORMAT           (0x0014 >> 2)
 130#define V_BLEND_LAYER0_CONTROL              (0x0018 >> 2)
 131#define V_BLEND_LAYER1_CONTROL              (0x001C >> 2)
 132
 133#define V_BLEND_RGB2YCBCR_COEFF(n)          ((0x0020 + 4 * n) >> 2)
 134#define V_BLEND_IN1CSC_COEFF(n)             ((0x0044 + 4 * n) >> 2)
 135
 136#define V_BLEND_LUMA_IN1CSC_OFFSET          (0x0068 >> 2)
 137#define V_BLEND_CR_IN1CSC_OFFSET            (0x006C >> 2)
 138#define V_BLEND_CB_IN1CSC_OFFSET            (0x0070 >> 2)
 139#define V_BLEND_LUMA_OUTCSC_OFFSET          (0x0074 >> 2)
 140#define V_BLEND_CR_OUTCSC_OFFSET            (0x0078 >> 2)
 141#define V_BLEND_CB_OUTCSC_OFFSET            (0x007C >> 2)
 142
 143#define V_BLEND_IN2CSC_COEFF(n)             ((0x0080 + 4 * n) >> 2)
 144
 145#define V_BLEND_LUMA_IN2CSC_OFFSET          (0x00A4 >> 2)
 146#define V_BLEND_CR_IN2CSC_OFFSET            (0x00A8 >> 2)
 147#define V_BLEND_CB_IN2CSC_OFFSET            (0x00AC >> 2)
 148#define V_BLEND_CHROMA_KEY_ENABLE           (0x01D0 >> 2)
 149#define V_BLEND_CHROMA_KEY_COMP1            (0x01D4 >> 2)
 150#define V_BLEND_CHROMA_KEY_COMP2            (0x01D8 >> 2)
 151#define V_BLEND_CHROMA_KEY_COMP3            (0x01DC >> 2)
 152
 153/*
 154 * Registers offset for Audio Video Buffer configuration.
 155 */
 156#define AV_BUF_MANAGER_OFFSET               (0xB000)
 157#define AV_BUF_FORMAT                       (0x0000 >> 2)
 158#define AV_BUF_NON_LIVE_LATENCY             (0x0008 >> 2)
 159#define AV_CHBUF0                           (0x0010 >> 2)
 160#define AV_CHBUF1                           (0x0014 >> 2)
 161#define AV_CHBUF2                           (0x0018 >> 2)
 162#define AV_CHBUF3                           (0x001C >> 2)
 163#define AV_CHBUF4                           (0x0020 >> 2)
 164#define AV_CHBUF5                           (0x0024 >> 2)
 165#define AV_BUF_STC_CONTROL                  (0x002C >> 2)
 166#define AV_BUF_STC_INIT_VALUE0              (0x0030 >> 2)
 167#define AV_BUF_STC_INIT_VALUE1              (0x0034 >> 2)
 168#define AV_BUF_STC_ADJ                      (0x0038 >> 2)
 169#define AV_BUF_STC_VIDEO_VSYNC_TS_REG0      (0x003C >> 2)
 170#define AV_BUF_STC_VIDEO_VSYNC_TS_REG1      (0x0040 >> 2)
 171#define AV_BUF_STC_EXT_VSYNC_TS_REG0        (0x0044 >> 2)
 172#define AV_BUF_STC_EXT_VSYNC_TS_REG1        (0x0048 >> 2)
 173#define AV_BUF_STC_CUSTOM_EVENT_TS_REG0     (0x004C >> 2)
 174#define AV_BUF_STC_CUSTOM_EVENT_TS_REG1     (0x0050 >> 2)
 175#define AV_BUF_STC_CUSTOM_EVENT2_TS_REG0    (0x0054 >> 2)
 176#define AV_BUF_STC_CUSTOM_EVENT2_TS_REG1    (0x0058 >> 2)
 177#define AV_BUF_STC_SNAPSHOT0                (0x0060 >> 2)
 178#define AV_BUF_STC_SNAPSHOT1                (0x0064 >> 2)
 179#define AV_BUF_OUTPUT_AUDIO_VIDEO_SELECT    (0x0070 >> 2)
 180#define AV_BUF_HCOUNT_VCOUNT_INT0           (0x0074 >> 2)
 181#define AV_BUF_HCOUNT_VCOUNT_INT1           (0x0078 >> 2)
 182#define AV_BUF_DITHER_CONFIG                (0x007C >> 2)
 183#define AV_BUF_DITHER_CONFIG_MAX            (0x008C >> 2)
 184#define AV_BUF_DITHER_CONFIG_MIN            (0x0090 >> 2)
 185#define AV_BUF_PATTERN_GEN_SELECT           (0x0100 >> 2)
 186#define AV_BUF_AUD_VID_CLK_SOURCE           (0x0120 >> 2)
 187#define AV_BUF_SRST_REG                     (0x0124 >> 2)
 188#define AV_BUF_AUDIO_RDY_INTERVAL           (0x0128 >> 2)
 189#define AV_BUF_AUDIO_CH_CONFIG              (0x012C >> 2)
 190
 191#define AV_BUF_GRAPHICS_COMP_SCALE_FACTOR(n)((0x0200 + 4 * n) >> 2)
 192
 193#define AV_BUF_VIDEO_COMP_SCALE_FACTOR(n)   ((0x020C + 4 * n) >> 2)
 194
 195#define AV_BUF_LIVE_VIDEO_COMP_SF(n)        ((0x0218 + 4 * n) >> 2)
 196
 197#define AV_BUF_LIVE_VID_CONFIG              (0x0224 >> 2)
 198
 199#define AV_BUF_LIVE_GFX_COMP_SF(n)          ((0x0228 + 4 * n) >> 2)
 200
 201#define AV_BUF_LIVE_GFX_CONFIG              (0x0234 >> 2)
 202
 203#define AUDIO_MIXER_REGISTER_OFFSET         (0xC000)
 204#define AUDIO_MIXER_VOLUME_CONTROL          (0x0000 >> 2)
 205#define AUDIO_MIXER_META_DATA               (0x0004 >> 2)
 206#define AUD_CH_STATUS_REG(n)                ((0x0008 + 4 * n) >> 2)
 207#define AUD_CH_A_DATA_REG(n)                ((0x0020 + 4 * n) >> 2)
 208#define AUD_CH_B_DATA_REG(n)                ((0x0038 + 4 * n) >> 2)
 209
 210#define DP_AUDIO_DMA_CHANNEL(n)             (4 + n)
 211#define DP_GRAPHIC_DMA_CHANNEL              (3)
 212#define DP_VIDEO_DMA_CHANNEL                (0)
 213
 214enum DPGraphicFmt {
 215    DP_GRAPHIC_RGBA8888 = 0 << 8,
 216    DP_GRAPHIC_ABGR8888 = 1 << 8,
 217    DP_GRAPHIC_RGB888 = 2 << 8,
 218    DP_GRAPHIC_BGR888 = 3 << 8,
 219    DP_GRAPHIC_RGBA5551 = 4 << 8,
 220    DP_GRAPHIC_RGBA4444 = 5 << 8,
 221    DP_GRAPHIC_RGB565 = 6 << 8,
 222    DP_GRAPHIC_8BPP = 7 << 8,
 223    DP_GRAPHIC_4BPP = 8 << 8,
 224    DP_GRAPHIC_2BPP = 9 << 8,
 225    DP_GRAPHIC_1BPP = 10 << 8,
 226    DP_GRAPHIC_MASK = 0xF << 8
 227};
 228
 229enum DPVideoFmt {
 230    DP_NL_VID_CB_Y0_CR_Y1 = 0,
 231    DP_NL_VID_CR_Y0_CB_Y1 = 1,
 232    DP_NL_VID_Y0_CR_Y1_CB = 2,
 233    DP_NL_VID_Y0_CB_Y1_CR = 3,
 234    DP_NL_VID_YV16 = 4,
 235    DP_NL_VID_YV24 = 5,
 236    DP_NL_VID_YV16CL = 6,
 237    DP_NL_VID_MONO = 7,
 238    DP_NL_VID_YV16CL2 = 8,
 239    DP_NL_VID_YUV444 = 9,
 240    DP_NL_VID_RGB888 = 10,
 241    DP_NL_VID_RGBA8880 = 11,
 242    DP_NL_VID_RGB888_10BPC = 12,
 243    DP_NL_VID_YUV444_10BPC = 13,
 244    DP_NL_VID_YV16CL2_10BPC = 14,
 245    DP_NL_VID_YV16CL_10BPC = 15,
 246    DP_NL_VID_YV16_10BPC = 16,
 247    DP_NL_VID_YV24_10BPC = 17,
 248    DP_NL_VID_Y_ONLY_10BPC = 18,
 249    DP_NL_VID_YV16_420 = 19,
 250    DP_NL_VID_YV16CL_420 = 20,
 251    DP_NL_VID_YV16CL2_420 = 21,
 252    DP_NL_VID_YV16_420_10BPC = 22,
 253    DP_NL_VID_YV16CL_420_10BPC = 23,
 254    DP_NL_VID_YV16CL2_420_10BPC = 24,
 255    DP_NL_VID_FMT_MASK = 0x1F
 256};
 257
 258typedef enum DPGraphicFmt DPGraphicFmt;
 259typedef enum DPVideoFmt DPVideoFmt;
 260
 261static const VMStateDescription vmstate_dp = {
 262    .name = TYPE_XLNX_DP,
 263    .version_id = 1,
 264    .fields = (VMStateField[]){
 265        VMSTATE_UINT32_ARRAY(core_registers, XlnxDPState,
 266                             DP_CORE_REG_ARRAY_SIZE),
 267        VMSTATE_UINT32_ARRAY(avbufm_registers, XlnxDPState,
 268                             DP_AVBUF_REG_ARRAY_SIZE),
 269        VMSTATE_UINT32_ARRAY(vblend_registers, XlnxDPState,
 270                             DP_VBLEND_REG_ARRAY_SIZE),
 271        VMSTATE_UINT32_ARRAY(audio_registers, XlnxDPState,
 272                             DP_AUDIO_REG_ARRAY_SIZE),
 273        VMSTATE_END_OF_LIST()
 274    }
 275};
 276
 277static void xlnx_dp_update_irq(XlnxDPState *s);
 278
 279static uint64_t xlnx_dp_audio_read(void *opaque, hwaddr offset, unsigned size)
 280{
 281    XlnxDPState *s = XLNX_DP(opaque);
 282
 283    offset = offset >> 2;
 284    return s->audio_registers[offset];
 285}
 286
 287static void xlnx_dp_audio_write(void *opaque, hwaddr offset, uint64_t value,
 288                                unsigned size)
 289{
 290    XlnxDPState *s = XLNX_DP(opaque);
 291
 292    offset = offset >> 2;
 293
 294    switch (offset) {
 295    case AUDIO_MIXER_META_DATA:
 296        s->audio_registers[offset] = value & 0x00000001;
 297        break;
 298    default:
 299        s->audio_registers[offset] = value;
 300        break;
 301    }
 302}
 303
 304static const MemoryRegionOps audio_ops = {
 305    .read = xlnx_dp_audio_read,
 306    .write = xlnx_dp_audio_write,
 307    .endianness = DEVICE_NATIVE_ENDIAN,
 308};
 309
 310static inline uint32_t xlnx_dp_audio_get_volume(XlnxDPState *s,
 311                                                uint8_t channel)
 312{
 313    switch (channel) {
 314    case 0:
 315        return extract32(s->audio_registers[AUDIO_MIXER_VOLUME_CONTROL], 0, 16);
 316    case 1:
 317        return extract32(s->audio_registers[AUDIO_MIXER_VOLUME_CONTROL], 16,
 318                                                                         16);
 319    default:
 320        return 0;
 321    }
 322}
 323
 324static inline void xlnx_dp_audio_activate(XlnxDPState *s)
 325{
 326    bool activated = ((s->core_registers[DP_TX_AUDIO_CONTROL]
 327                   & DP_TX_AUD_CTRL) != 0);
 328    AUD_set_active_out(s->amixer_output_stream, activated);
 329    xlnx_dpdma_set_host_data_location(s->dpdma, DP_AUDIO_DMA_CHANNEL(0),
 330                                      &s->audio_buffer_0);
 331    xlnx_dpdma_set_host_data_location(s->dpdma, DP_AUDIO_DMA_CHANNEL(1),
 332                                      &s->audio_buffer_1);
 333}
 334
 335static inline void xlnx_dp_audio_mix_buffer(XlnxDPState *s)
 336{
 337    /*
 338     * Audio packets are signed and have this shape:
 339     * | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
 340     * | R3 | L3 | R2 | L2 | R1 | L1 | R0 | L0 |
 341     *
 342     * Output audio is 16bits saturated.
 343     */
 344    int i;
 345
 346    if ((s->audio_data_available[0]) && (xlnx_dp_audio_get_volume(s, 0))) {
 347        for (i = 0; i < s->audio_data_available[0] / 2; i++) {
 348            s->temp_buffer[i] = (int64_t)(s->audio_buffer_0[i])
 349                              * xlnx_dp_audio_get_volume(s, 0) / 8192;
 350        }
 351        s->byte_left = s->audio_data_available[0];
 352    } else {
 353        memset(s->temp_buffer, 0, s->audio_data_available[1] / 2);
 354    }
 355
 356    if ((s->audio_data_available[1]) && (xlnx_dp_audio_get_volume(s, 1))) {
 357        if ((s->audio_data_available[0] == 0)
 358        || (s->audio_data_available[1] == s->audio_data_available[0])) {
 359            for (i = 0; i < s->audio_data_available[1] / 2; i++) {
 360                s->temp_buffer[i] += (int64_t)(s->audio_buffer_1[i])
 361                                   * xlnx_dp_audio_get_volume(s, 1) / 8192;
 362            }
 363            s->byte_left = s->audio_data_available[1];
 364        }
 365    }
 366
 367    for (i = 0; i < s->byte_left / 2; i++) {
 368        s->out_buffer[i] = MAX(-32767, MIN(s->temp_buffer[i], 32767));
 369    }
 370
 371    s->data_ptr = 0;
 372}
 373
 374static void xlnx_dp_audio_callback(void *opaque, int avail)
 375{
 376    /*
 377     * Get some data from the DPDMA and compute these datas.
 378     * Then wait for QEMU's audio subsystem to call this callback.
 379     */
 380    XlnxDPState *s = XLNX_DP(opaque);
 381    size_t written = 0;
 382
 383    /* If there are already some data don't get more data. */
 384    if (s->byte_left == 0) {
 385        s->audio_data_available[0] = xlnx_dpdma_start_operation(s->dpdma, 4,
 386                                                                  true);
 387        s->audio_data_available[1] = xlnx_dpdma_start_operation(s->dpdma, 5,
 388                                                                  true);
 389        xlnx_dp_audio_mix_buffer(s);
 390    }
 391
 392    /* Send the buffer through the audio. */
 393    if (s->byte_left <= MAX_QEMU_BUFFER_SIZE) {
 394        if (s->byte_left != 0) {
 395            written = AUD_write(s->amixer_output_stream,
 396                                &s->out_buffer[s->data_ptr], s->byte_left);
 397        } else {
 398             int len_to_copy;
 399            /*
 400             * There is nothing to play.. We don't have any data! Fill the
 401             * buffer with zero's and send it.
 402             */
 403            written = 0;
 404            while (avail) {
 405                len_to_copy = MIN(AUD_CHBUF_MAX_DEPTH, avail);
 406                memset(s->out_buffer, 0, len_to_copy);
 407                avail -= AUD_write(s->amixer_output_stream, s->out_buffer,
 408                                   len_to_copy);
 409            }
 410        }
 411    } else {
 412        written = AUD_write(s->amixer_output_stream,
 413                            &s->out_buffer[s->data_ptr], MAX_QEMU_BUFFER_SIZE);
 414    }
 415    s->byte_left -= written;
 416    s->data_ptr += written;
 417}
 418
 419/*
 420 * AUX channel related function.
 421 */
 422static void xlnx_dp_aux_clear_rx_fifo(XlnxDPState *s)
 423{
 424    fifo8_reset(&s->rx_fifo);
 425}
 426
 427static void xlnx_dp_aux_push_rx_fifo(XlnxDPState *s, uint8_t *buf, size_t len)
 428{
 429    DPRINTF("Push %u data in rx_fifo\n", (unsigned)len);
 430    fifo8_push_all(&s->rx_fifo, buf, len);
 431}
 432
 433static uint8_t xlnx_dp_aux_pop_rx_fifo(XlnxDPState *s)
 434{
 435    uint8_t ret;
 436
 437    if (fifo8_is_empty(&s->rx_fifo)) {
 438        qemu_log_mask(LOG_GUEST_ERROR,
 439                      "%s: Reading empty RX_FIFO\n",
 440                      __func__);
 441        /*
 442         * The datasheet is not clear about the reset value, it seems
 443         * to be unspecified. We choose to return '0'.
 444         */
 445        ret = 0;
 446    } else {
 447        ret = fifo8_pop(&s->rx_fifo);
 448        DPRINTF("pop 0x%" PRIX8 " from rx_fifo.\n", ret);
 449    }
 450    return ret;
 451}
 452
 453static void xlnx_dp_aux_clear_tx_fifo(XlnxDPState *s)
 454{
 455    fifo8_reset(&s->tx_fifo);
 456}
 457
 458static void xlnx_dp_aux_push_tx_fifo(XlnxDPState *s, uint8_t *buf, size_t len)
 459{
 460    DPRINTF("Push %u data in tx_fifo\n", (unsigned)len);
 461    fifo8_push_all(&s->tx_fifo, buf, len);
 462}
 463
 464static uint8_t xlnx_dp_aux_pop_tx_fifo(XlnxDPState *s)
 465{
 466    uint8_t ret;
 467
 468    if (fifo8_is_empty(&s->tx_fifo)) {
 469        error_report("%s: TX_FIFO underflow", __func__);
 470        abort();
 471    }
 472    ret = fifo8_pop(&s->tx_fifo);
 473    DPRINTF("pop 0x%2.2X from tx_fifo.\n", ret);
 474    return ret;
 475}
 476
 477static uint32_t xlnx_dp_aux_get_address(XlnxDPState *s)
 478{
 479    return s->core_registers[DP_AUX_ADDRESS];
 480}
 481
 482/*
 483 * Get command from the register.
 484 */
 485static void xlnx_dp_aux_set_command(XlnxDPState *s, uint32_t value)
 486{
 487    bool address_only = (value & AUX_ADDR_ONLY_MASK) != 0;
 488    AUXCommand cmd = (value & AUX_COMMAND_MASK) >> AUX_COMMAND_SHIFT;
 489    uint8_t nbytes = (value & AUX_COMMAND_NBYTES) + 1;
 490    uint8_t buf[16];
 491    int i;
 492
 493    /*
 494     * When an address_only command is executed nothing happen to the fifo, so
 495     * just make nbytes = 0.
 496     */
 497    if (address_only) {
 498        nbytes = 0;
 499    }
 500
 501    switch (cmd) {
 502    case READ_AUX:
 503    case READ_I2C:
 504    case READ_I2C_MOT:
 505        s->core_registers[DP_AUX_REPLY_CODE] = aux_request(s->aux_bus, cmd,
 506                                               xlnx_dp_aux_get_address(s),
 507                                               nbytes, buf);
 508        s->core_registers[DP_REPLY_DATA_COUNT] = nbytes;
 509
 510        if (s->core_registers[DP_AUX_REPLY_CODE] == AUX_I2C_ACK) {
 511            xlnx_dp_aux_push_rx_fifo(s, buf, nbytes);
 512        }
 513        break;
 514    case WRITE_AUX:
 515    case WRITE_I2C:
 516    case WRITE_I2C_MOT:
 517        for (i = 0; i < nbytes; i++) {
 518            buf[i] = xlnx_dp_aux_pop_tx_fifo(s);
 519        }
 520        s->core_registers[DP_AUX_REPLY_CODE] = aux_request(s->aux_bus, cmd,
 521                                               xlnx_dp_aux_get_address(s),
 522                                               nbytes, buf);
 523        xlnx_dp_aux_clear_tx_fifo(s);
 524        break;
 525    case WRITE_I2C_STATUS:
 526        qemu_log_mask(LOG_UNIMP, "xlnx_dp: Write i2c status not implemented\n");
 527        break;
 528    default:
 529        error_report("%s: invalid command: %u", __func__, cmd);
 530        abort();
 531    }
 532
 533    s->core_registers[DP_INTERRUPT_SIGNAL_STATE] |= 0x04;
 534}
 535
 536static void xlnx_dp_set_dpdma(const Object *obj, const char *name, Object *val,
 537                              Error **errp)
 538{
 539    XlnxDPState *s = XLNX_DP(obj);
 540    if (s->console) {
 541        DisplaySurface *surface = qemu_console_surface(s->console);
 542        XlnxDPDMAState *dma = XLNX_DPDMA(val);
 543        xlnx_dpdma_set_host_data_location(dma, DP_GRAPHIC_DMA_CHANNEL,
 544                                          surface_data(surface));
 545    }
 546}
 547
 548static inline uint8_t xlnx_dp_global_alpha_value(XlnxDPState *s)
 549{
 550    return (s->vblend_registers[V_BLEND_SET_GLOBAL_ALPHA_REG] & 0x1FE) >> 1;
 551}
 552
 553static inline bool xlnx_dp_global_alpha_enabled(XlnxDPState *s)
 554{
 555    /*
 556     * If the alpha is totally opaque (255) we consider the alpha is disabled to
 557     * reduce CPU consumption.
 558     */
 559    return ((xlnx_dp_global_alpha_value(s) != 0xFF) &&
 560           ((s->vblend_registers[V_BLEND_SET_GLOBAL_ALPHA_REG] & 0x01) != 0));
 561}
 562
 563static void xlnx_dp_recreate_surface(XlnxDPState *s)
 564{
 565    /*
 566     * Two possibilities, if blending is enabled the console displays
 567     * bout_plane, if not g_plane is displayed.
 568     */
 569    uint16_t width = s->core_registers[DP_MAIN_STREAM_HRES];
 570    uint16_t height = s->core_registers[DP_MAIN_STREAM_VRES];
 571    DisplaySurface *current_console_surface = qemu_console_surface(s->console);
 572
 573    if ((width != 0) && (height != 0)) {
 574        /*
 575         * As dpy_gfx_replace_surface calls qemu_free_displaysurface on the
 576         * surface we need to be careful and don't free the surface associated
 577         * to the console or double free will happen.
 578         */
 579        if (s->bout_plane.surface != current_console_surface) {
 580            qemu_free_displaysurface(s->bout_plane.surface);
 581        }
 582        if (s->v_plane.surface != current_console_surface) {
 583            qemu_free_displaysurface(s->v_plane.surface);
 584        }
 585        if (s->g_plane.surface != current_console_surface) {
 586            qemu_free_displaysurface(s->g_plane.surface);
 587        }
 588
 589        s->g_plane.surface
 590                = qemu_create_displaysurface_from(width, height,
 591                                                  s->g_plane.format, 0, NULL);
 592        s->v_plane.surface
 593                = qemu_create_displaysurface_from(width, height,
 594                                                  s->v_plane.format, 0, NULL);
 595        if (xlnx_dp_global_alpha_enabled(s)) {
 596            s->bout_plane.surface =
 597                            qemu_create_displaysurface_from(width,
 598                                                            height,
 599                                                            s->g_plane.format,
 600                                                            0, NULL);
 601            dpy_gfx_replace_surface(s->console, s->bout_plane.surface);
 602        } else {
 603            s->bout_plane.surface = NULL;
 604            dpy_gfx_replace_surface(s->console, s->g_plane.surface);
 605        }
 606
 607        xlnx_dpdma_set_host_data_location(s->dpdma, DP_GRAPHIC_DMA_CHANNEL,
 608                                            surface_data(s->g_plane.surface));
 609        xlnx_dpdma_set_host_data_location(s->dpdma, DP_VIDEO_DMA_CHANNEL,
 610                                            surface_data(s->v_plane.surface));
 611    }
 612}
 613
 614/*
 615 * Change the graphic format of the surface.
 616 */
 617static void xlnx_dp_change_graphic_fmt(XlnxDPState *s)
 618{
 619    switch (s->avbufm_registers[AV_BUF_FORMAT] & DP_GRAPHIC_MASK) {
 620    case DP_GRAPHIC_RGBA8888:
 621        s->g_plane.format = PIXMAN_r8g8b8a8;
 622        break;
 623    case DP_GRAPHIC_ABGR8888:
 624        s->g_plane.format = PIXMAN_a8b8g8r8;
 625        break;
 626    case DP_GRAPHIC_RGB565:
 627        s->g_plane.format = PIXMAN_r5g6b5;
 628        break;
 629    case DP_GRAPHIC_RGB888:
 630        s->g_plane.format = PIXMAN_r8g8b8;
 631        break;
 632    case DP_GRAPHIC_BGR888:
 633        s->g_plane.format = PIXMAN_b8g8r8;
 634        break;
 635    default:
 636        error_report("%s: unsupported graphic format %u", __func__,
 637                     s->avbufm_registers[AV_BUF_FORMAT] & DP_GRAPHIC_MASK);
 638        abort();
 639    }
 640
 641    switch (s->avbufm_registers[AV_BUF_FORMAT] & DP_NL_VID_FMT_MASK) {
 642    case 0:
 643        s->v_plane.format = PIXMAN_x8b8g8r8;
 644        break;
 645    case DP_NL_VID_Y0_CB_Y1_CR:
 646        s->v_plane.format = PIXMAN_yuy2;
 647        break;
 648    case DP_NL_VID_RGBA8880:
 649        s->v_plane.format = PIXMAN_x8b8g8r8;
 650        break;
 651    default:
 652        error_report("%s: unsupported video format %u", __func__,
 653                     s->avbufm_registers[AV_BUF_FORMAT] & DP_NL_VID_FMT_MASK);
 654        abort();
 655    }
 656
 657    xlnx_dp_recreate_surface(s);
 658}
 659
 660static void xlnx_dp_update_irq(XlnxDPState *s)
 661{
 662    uint32_t flags;
 663
 664    flags = s->core_registers[DP_INT_STATUS] & ~s->core_registers[DP_INT_MASK];
 665    DPRINTF("update IRQ value = %" PRIx32 "\n", flags);
 666    qemu_set_irq(s->irq, flags != 0);
 667}
 668
 669static uint64_t xlnx_dp_read(void *opaque, hwaddr offset, unsigned size)
 670{
 671    XlnxDPState *s = XLNX_DP(opaque);
 672    uint64_t ret = 0;
 673
 674    offset = offset >> 2;
 675
 676    switch (offset) {
 677    case DP_TX_USER_FIFO_OVERFLOW:
 678        /* This register is cleared after a read */
 679        ret = s->core_registers[DP_TX_USER_FIFO_OVERFLOW];
 680        s->core_registers[DP_TX_USER_FIFO_OVERFLOW] = 0;
 681        break;
 682    case DP_AUX_REPLY_DATA:
 683        ret = xlnx_dp_aux_pop_rx_fifo(s);
 684        break;
 685    case DP_INTERRUPT_SIGNAL_STATE:
 686        /*
 687         * XXX: Not sure it is the right thing to do actually.
 688         * The register is not written by the device driver so it's stuck
 689         * to 0x04.
 690         */
 691        ret = s->core_registers[DP_INTERRUPT_SIGNAL_STATE];
 692        s->core_registers[DP_INTERRUPT_SIGNAL_STATE] &= ~0x04;
 693        break;
 694    case DP_AUX_WRITE_FIFO:
 695    case DP_TX_AUDIO_INFO_DATA(0):
 696    case DP_TX_AUDIO_INFO_DATA(1):
 697    case DP_TX_AUDIO_INFO_DATA(2):
 698    case DP_TX_AUDIO_INFO_DATA(3):
 699    case DP_TX_AUDIO_INFO_DATA(4):
 700    case DP_TX_AUDIO_INFO_DATA(5):
 701    case DP_TX_AUDIO_INFO_DATA(6):
 702    case DP_TX_AUDIO_INFO_DATA(7):
 703    case DP_TX_AUDIO_EXT_DATA(0):
 704    case DP_TX_AUDIO_EXT_DATA(1):
 705    case DP_TX_AUDIO_EXT_DATA(2):
 706    case DP_TX_AUDIO_EXT_DATA(3):
 707    case DP_TX_AUDIO_EXT_DATA(4):
 708    case DP_TX_AUDIO_EXT_DATA(5):
 709    case DP_TX_AUDIO_EXT_DATA(6):
 710    case DP_TX_AUDIO_EXT_DATA(7):
 711    case DP_TX_AUDIO_EXT_DATA(8):
 712        /* write only registers */
 713        ret = 0;
 714        break;
 715    default:
 716        assert(offset <= (0x3AC >> 2));
 717        if (offset == (0x3A8 >> 2) || offset == (0x3AC >> 2)) {
 718            ret = s->core_registers[DP_INT_MASK];
 719        } else {
 720            ret = s->core_registers[offset];
 721        }
 722        break;
 723    }
 724
 725    DPRINTF("core read @%" PRIx64 " = 0x%8.8" PRIX64 "\n", offset << 2, ret);
 726    return ret;
 727}
 728
 729static void xlnx_dp_write(void *opaque, hwaddr offset, uint64_t value,
 730                          unsigned size)
 731{
 732    XlnxDPState *s = XLNX_DP(opaque);
 733
 734    DPRINTF("core write @%" PRIx64 " = 0x%8.8" PRIX64 "\n", offset, value);
 735
 736    offset = offset >> 2;
 737
 738    switch (offset) {
 739    /*
 740     * Only special write case are handled.
 741     */
 742    case DP_LINK_BW_SET:
 743        s->core_registers[offset] = value & 0x000000FF;
 744        break;
 745    case DP_LANE_COUNT_SET:
 746    case DP_MAIN_STREAM_MISC0:
 747        s->core_registers[offset] = value & 0x0000000F;
 748        break;
 749    case DP_TRAINING_PATTERN_SET:
 750    case DP_LINK_QUAL_PATTERN_SET:
 751    case DP_MAIN_STREAM_POLARITY:
 752    case DP_PHY_VOLTAGE_DIFF_LANE_0:
 753    case DP_PHY_VOLTAGE_DIFF_LANE_1:
 754        s->core_registers[offset] = value & 0x00000003;
 755        break;
 756    case DP_ENHANCED_FRAME_EN:
 757    case DP_SCRAMBLING_DISABLE:
 758    case DP_DOWNSPREAD_CTRL:
 759    case DP_MAIN_STREAM_ENABLE:
 760    case DP_TRANSMIT_PRBS7:
 761        s->core_registers[offset] = value & 0x00000001;
 762        break;
 763    case DP_PHY_CLOCK_SELECT:
 764        s->core_registers[offset] = value & 0x00000007;
 765        break;
 766    case DP_SOFTWARE_RESET:
 767        /*
 768         * No need to update this bit as it's read '0'.
 769         */
 770        /*
 771         * TODO: reset IP.
 772         */
 773        break;
 774    case DP_TRANSMITTER_ENABLE:
 775        s->core_registers[offset] = value & 0x01;
 776        break;
 777    case DP_FORCE_SCRAMBLER_RESET:
 778        /*
 779         * No need to update this bit as it's read '0'.
 780         */
 781        /*
 782         * TODO: force a scrambler reset??
 783         */
 784        break;
 785    case DP_AUX_COMMAND_REGISTER:
 786        s->core_registers[offset] = value & 0x00001F0F;
 787        xlnx_dp_aux_set_command(s, s->core_registers[offset]);
 788        break;
 789    case DP_MAIN_STREAM_HTOTAL:
 790    case DP_MAIN_STREAM_VTOTAL:
 791    case DP_MAIN_STREAM_HSTART:
 792    case DP_MAIN_STREAM_VSTART:
 793        s->core_registers[offset] = value & 0x0000FFFF;
 794        break;
 795    case DP_MAIN_STREAM_HRES:
 796    case DP_MAIN_STREAM_VRES:
 797        s->core_registers[offset] = value & 0x0000FFFF;
 798        xlnx_dp_recreate_surface(s);
 799        break;
 800    case DP_MAIN_STREAM_HSWIDTH:
 801    case DP_MAIN_STREAM_VSWIDTH:
 802        s->core_registers[offset] = value & 0x00007FFF;
 803        break;
 804    case DP_MAIN_STREAM_MISC1:
 805        s->core_registers[offset] = value & 0x00000086;
 806        break;
 807    case DP_MAIN_STREAM_M_VID:
 808    case DP_MAIN_STREAM_N_VID:
 809        s->core_registers[offset] = value & 0x00FFFFFF;
 810        break;
 811    case DP_MSA_TRANSFER_UNIT_SIZE:
 812    case DP_MIN_BYTES_PER_TU:
 813    case DP_INIT_WAIT:
 814        s->core_registers[offset] = value & 0x00000007;
 815        break;
 816    case DP_USER_DATA_COUNT_PER_LANE:
 817        s->core_registers[offset] = value & 0x0003FFFF;
 818        break;
 819    case DP_FRAC_BYTES_PER_TU:
 820        s->core_registers[offset] = value & 0x000003FF;
 821        break;
 822    case DP_PHY_RESET:
 823        s->core_registers[offset] = value & 0x00010003;
 824        /*
 825         * TODO: Reset something?
 826         */
 827        break;
 828    case DP_TX_PHY_POWER_DOWN:
 829        s->core_registers[offset] = value & 0x0000000F;
 830        /*
 831         * TODO: Power down things?
 832         */
 833        break;
 834    case DP_AUX_WRITE_FIFO: {
 835        uint8_t c = value;
 836        xlnx_dp_aux_push_tx_fifo(s, &c, 1);
 837        break;
 838    }
 839    case DP_AUX_CLOCK_DIVIDER:
 840        break;
 841    case DP_AUX_REPLY_COUNT:
 842        /*
 843         * Writing to this register clear the counter.
 844         */
 845        s->core_registers[offset] = 0x00000000;
 846        break;
 847    case DP_AUX_ADDRESS:
 848        s->core_registers[offset] = value & 0x000FFFFF;
 849        break;
 850    case DP_VERSION_REGISTER:
 851    case DP_CORE_ID:
 852    case DP_TX_USER_FIFO_OVERFLOW:
 853    case DP_AUX_REPLY_DATA:
 854    case DP_AUX_REPLY_CODE:
 855    case DP_REPLY_DATA_COUNT:
 856    case DP_REPLY_STATUS:
 857    case DP_HPD_DURATION:
 858        /*
 859         * Write to read only location..
 860         */
 861        break;
 862    case DP_TX_AUDIO_CONTROL:
 863        s->core_registers[offset] = value & 0x00000001;
 864        xlnx_dp_audio_activate(s);
 865        break;
 866    case DP_TX_AUDIO_CHANNELS:
 867        s->core_registers[offset] = value & 0x00000007;
 868        xlnx_dp_audio_activate(s);
 869        break;
 870    case DP_INT_STATUS:
 871        s->core_registers[DP_INT_STATUS] &= ~value;
 872        xlnx_dp_update_irq(s);
 873        break;
 874    case DP_INT_EN:
 875        s->core_registers[DP_INT_MASK] &= ~value;
 876        xlnx_dp_update_irq(s);
 877        break;
 878    case DP_INT_DS:
 879        s->core_registers[DP_INT_MASK] |= ~value;
 880        xlnx_dp_update_irq(s);
 881        break;
 882    default:
 883        assert(offset <= (0x504C >> 2));
 884        s->core_registers[offset] = value;
 885        break;
 886    }
 887}
 888
 889static const MemoryRegionOps dp_ops = {
 890    .read = xlnx_dp_read,
 891    .write = xlnx_dp_write,
 892    .endianness = DEVICE_NATIVE_ENDIAN,
 893    .valid = {
 894        .min_access_size = 4,
 895        .max_access_size = 4,
 896    },
 897    .impl = {
 898        .min_access_size = 4,
 899        .max_access_size = 4,
 900    },
 901};
 902
 903/*
 904 * This is to handle Read/Write to the Video Blender.
 905 */
 906static void xlnx_dp_vblend_write(void *opaque, hwaddr offset,
 907                                 uint64_t value, unsigned size)
 908{
 909    XlnxDPState *s = XLNX_DP(opaque);
 910    bool alpha_was_enabled;
 911
 912    DPRINTF("vblend: write @0x%" HWADDR_PRIX " = 0x%" PRIX32 "\n", offset,
 913                                                               (uint32_t)value);
 914    offset = offset >> 2;
 915
 916    switch (offset) {
 917    case V_BLEND_BG_CLR_0:
 918    case V_BLEND_BG_CLR_1:
 919    case V_BLEND_BG_CLR_2:
 920        s->vblend_registers[offset] = value & 0x00000FFF;
 921        break;
 922    case V_BLEND_SET_GLOBAL_ALPHA_REG:
 923        /*
 924         * A write to this register can enable or disable blending. Thus we need
 925         * to recreate the surfaces.
 926         */
 927        alpha_was_enabled = xlnx_dp_global_alpha_enabled(s);
 928        s->vblend_registers[offset] = value & 0x000001FF;
 929        if (xlnx_dp_global_alpha_enabled(s) != alpha_was_enabled) {
 930            xlnx_dp_recreate_surface(s);
 931        }
 932        break;
 933    case V_BLEND_OUTPUT_VID_FORMAT:
 934        s->vblend_registers[offset] = value & 0x00000017;
 935        break;
 936    case V_BLEND_LAYER0_CONTROL:
 937    case V_BLEND_LAYER1_CONTROL:
 938        s->vblend_registers[offset] = value & 0x00000103;
 939        break;
 940    case V_BLEND_RGB2YCBCR_COEFF(0):
 941    case V_BLEND_RGB2YCBCR_COEFF(1):
 942    case V_BLEND_RGB2YCBCR_COEFF(2):
 943    case V_BLEND_RGB2YCBCR_COEFF(3):
 944    case V_BLEND_RGB2YCBCR_COEFF(4):
 945    case V_BLEND_RGB2YCBCR_COEFF(5):
 946    case V_BLEND_RGB2YCBCR_COEFF(6):
 947    case V_BLEND_RGB2YCBCR_COEFF(7):
 948    case V_BLEND_RGB2YCBCR_COEFF(8):
 949    case V_BLEND_IN1CSC_COEFF(0):
 950    case V_BLEND_IN1CSC_COEFF(1):
 951    case V_BLEND_IN1CSC_COEFF(2):
 952    case V_BLEND_IN1CSC_COEFF(3):
 953    case V_BLEND_IN1CSC_COEFF(4):
 954    case V_BLEND_IN1CSC_COEFF(5):
 955    case V_BLEND_IN1CSC_COEFF(6):
 956    case V_BLEND_IN1CSC_COEFF(7):
 957    case V_BLEND_IN1CSC_COEFF(8):
 958    case V_BLEND_IN2CSC_COEFF(0):
 959    case V_BLEND_IN2CSC_COEFF(1):
 960    case V_BLEND_IN2CSC_COEFF(2):
 961    case V_BLEND_IN2CSC_COEFF(3):
 962    case V_BLEND_IN2CSC_COEFF(4):
 963    case V_BLEND_IN2CSC_COEFF(5):
 964    case V_BLEND_IN2CSC_COEFF(6):
 965    case V_BLEND_IN2CSC_COEFF(7):
 966    case V_BLEND_IN2CSC_COEFF(8):
 967        s->vblend_registers[offset] = value & 0x0000FFFF;
 968        break;
 969    case V_BLEND_LUMA_IN1CSC_OFFSET:
 970    case V_BLEND_CR_IN1CSC_OFFSET:
 971    case V_BLEND_CB_IN1CSC_OFFSET:
 972    case V_BLEND_LUMA_IN2CSC_OFFSET:
 973    case V_BLEND_CR_IN2CSC_OFFSET:
 974    case V_BLEND_CB_IN2CSC_OFFSET:
 975    case V_BLEND_LUMA_OUTCSC_OFFSET:
 976    case V_BLEND_CR_OUTCSC_OFFSET:
 977    case V_BLEND_CB_OUTCSC_OFFSET:
 978        s->vblend_registers[offset] = value & 0x3FFF7FFF;
 979        break;
 980    case V_BLEND_CHROMA_KEY_ENABLE:
 981        s->vblend_registers[offset] = value & 0x00000003;
 982        break;
 983    case V_BLEND_CHROMA_KEY_COMP1:
 984    case V_BLEND_CHROMA_KEY_COMP2:
 985    case V_BLEND_CHROMA_KEY_COMP3:
 986        s->vblend_registers[offset] = value & 0x0FFF0FFF;
 987        break;
 988    default:
 989        s->vblend_registers[offset] = value;
 990        break;
 991    }
 992}
 993
 994static uint64_t xlnx_dp_vblend_read(void *opaque, hwaddr offset,
 995                                    unsigned size)
 996{
 997    XlnxDPState *s = XLNX_DP(opaque);
 998
 999    DPRINTF("vblend: read @0x%" HWADDR_PRIX " = 0x%" PRIX32 "\n", offset,
1000            s->vblend_registers[offset >> 2]);
1001    return s->vblend_registers[offset >> 2];
1002}
1003
1004static const MemoryRegionOps vblend_ops = {
1005    .read = xlnx_dp_vblend_read,
1006    .write = xlnx_dp_vblend_write,
1007    .endianness = DEVICE_NATIVE_ENDIAN,
1008    .valid = {
1009        .min_access_size = 4,
1010        .max_access_size = 4,
1011    },
1012    .impl = {
1013        .min_access_size = 4,
1014        .max_access_size = 4,
1015    },
1016};
1017
1018/*
1019 * This is to handle Read/Write to the Audio Video buffer manager.
1020 */
1021static void xlnx_dp_avbufm_write(void *opaque, hwaddr offset, uint64_t value,
1022                                 unsigned size)
1023{
1024    XlnxDPState *s = XLNX_DP(opaque);
1025
1026    DPRINTF("avbufm: write @0x%" HWADDR_PRIX " = 0x%" PRIX32 "\n", offset,
1027                                                               (uint32_t)value);
1028    offset = offset >> 2;
1029
1030    switch (offset) {
1031    case AV_BUF_FORMAT:
1032        s->avbufm_registers[offset] = value & 0x00000FFF;
1033        xlnx_dp_change_graphic_fmt(s);
1034        break;
1035    case AV_CHBUF0:
1036    case AV_CHBUF1:
1037    case AV_CHBUF2:
1038    case AV_CHBUF3:
1039    case AV_CHBUF4:
1040    case AV_CHBUF5:
1041        s->avbufm_registers[offset] = value & 0x0000007F;
1042        break;
1043    case AV_BUF_OUTPUT_AUDIO_VIDEO_SELECT:
1044        s->avbufm_registers[offset] = value & 0x0000007F;
1045        break;
1046    case AV_BUF_DITHER_CONFIG:
1047        s->avbufm_registers[offset] = value & 0x000007FF;
1048        break;
1049    case AV_BUF_DITHER_CONFIG_MAX:
1050    case AV_BUF_DITHER_CONFIG_MIN:
1051        s->avbufm_registers[offset] = value & 0x00000FFF;
1052        break;
1053    case AV_BUF_PATTERN_GEN_SELECT:
1054        s->avbufm_registers[offset] = value & 0xFFFFFF03;
1055        break;
1056    case AV_BUF_AUD_VID_CLK_SOURCE:
1057        s->avbufm_registers[offset] = value & 0x00000007;
1058        break;
1059    case AV_BUF_SRST_REG:
1060        s->avbufm_registers[offset] = value & 0x00000002;
1061        break;
1062    case AV_BUF_AUDIO_CH_CONFIG:
1063        s->avbufm_registers[offset] = value & 0x00000003;
1064        break;
1065    case AV_BUF_GRAPHICS_COMP_SCALE_FACTOR(0):
1066    case AV_BUF_GRAPHICS_COMP_SCALE_FACTOR(1):
1067    case AV_BUF_GRAPHICS_COMP_SCALE_FACTOR(2):
1068    case AV_BUF_VIDEO_COMP_SCALE_FACTOR(0):
1069    case AV_BUF_VIDEO_COMP_SCALE_FACTOR(1):
1070    case AV_BUF_VIDEO_COMP_SCALE_FACTOR(2):
1071        s->avbufm_registers[offset] = value & 0x0000FFFF;
1072        break;
1073    case AV_BUF_LIVE_VIDEO_COMP_SF(0):
1074    case AV_BUF_LIVE_VIDEO_COMP_SF(1):
1075    case AV_BUF_LIVE_VIDEO_COMP_SF(2):
1076    case AV_BUF_LIVE_VID_CONFIG:
1077    case AV_BUF_LIVE_GFX_COMP_SF(0):
1078    case AV_BUF_LIVE_GFX_COMP_SF(1):
1079    case AV_BUF_LIVE_GFX_COMP_SF(2):
1080    case AV_BUF_LIVE_GFX_CONFIG:
1081    case AV_BUF_NON_LIVE_LATENCY:
1082    case AV_BUF_STC_CONTROL:
1083    case AV_BUF_STC_INIT_VALUE0:
1084    case AV_BUF_STC_INIT_VALUE1:
1085    case AV_BUF_STC_ADJ:
1086    case AV_BUF_STC_VIDEO_VSYNC_TS_REG0:
1087    case AV_BUF_STC_VIDEO_VSYNC_TS_REG1:
1088    case AV_BUF_STC_EXT_VSYNC_TS_REG0:
1089    case AV_BUF_STC_EXT_VSYNC_TS_REG1:
1090    case AV_BUF_STC_CUSTOM_EVENT_TS_REG0:
1091    case AV_BUF_STC_CUSTOM_EVENT_TS_REG1:
1092    case AV_BUF_STC_CUSTOM_EVENT2_TS_REG0:
1093    case AV_BUF_STC_CUSTOM_EVENT2_TS_REG1:
1094    case AV_BUF_STC_SNAPSHOT0:
1095    case AV_BUF_STC_SNAPSHOT1:
1096    case AV_BUF_HCOUNT_VCOUNT_INT0:
1097    case AV_BUF_HCOUNT_VCOUNT_INT1:
1098        qemu_log_mask(LOG_UNIMP, "avbufm: unimplemented register 0x%04"
1099                                 PRIx64 "\n",
1100                      offset << 2);
1101        break;
1102    default:
1103        s->avbufm_registers[offset] = value;
1104        break;
1105    }
1106}
1107
1108static uint64_t xlnx_dp_avbufm_read(void *opaque, hwaddr offset,
1109                                    unsigned size)
1110{
1111    XlnxDPState *s = XLNX_DP(opaque);
1112
1113    offset = offset >> 2;
1114    return s->avbufm_registers[offset];
1115}
1116
1117static const MemoryRegionOps avbufm_ops = {
1118    .read = xlnx_dp_avbufm_read,
1119    .write = xlnx_dp_avbufm_write,
1120    .endianness = DEVICE_NATIVE_ENDIAN,
1121    .valid = {
1122        .min_access_size = 4,
1123        .max_access_size = 4,
1124    },
1125    .impl = {
1126        .min_access_size = 4,
1127        .max_access_size = 4,
1128    },
1129};
1130
1131/*
1132 * This is a global alpha blending using pixman.
1133 * Both graphic and video planes are multiplied with the global alpha
1134 * coefficient and added.
1135 */
1136static inline void xlnx_dp_blend_surface(XlnxDPState *s)
1137{
1138    pixman_fixed_t alpha1[] = { pixman_double_to_fixed(1),
1139                                pixman_double_to_fixed(1),
1140                                pixman_double_to_fixed(1.0) };
1141    pixman_fixed_t alpha2[] = { pixman_double_to_fixed(1),
1142                                pixman_double_to_fixed(1),
1143                                pixman_double_to_fixed(1.0) };
1144
1145    if ((surface_width(s->g_plane.surface)
1146         != surface_width(s->v_plane.surface)) ||
1147        (surface_height(s->g_plane.surface)
1148         != surface_height(s->v_plane.surface))) {
1149        return;
1150    }
1151
1152    alpha1[2] = pixman_double_to_fixed((double)(xlnx_dp_global_alpha_value(s))
1153                                       / 256.0);
1154    alpha2[2] = pixman_double_to_fixed((255.0
1155                                    - (double)xlnx_dp_global_alpha_value(s))
1156                                       / 256.0);
1157
1158    pixman_image_set_filter(s->g_plane.surface->image,
1159                            PIXMAN_FILTER_CONVOLUTION, alpha1, 3);
1160    pixman_image_composite(PIXMAN_OP_SRC, s->g_plane.surface->image, 0,
1161                           s->bout_plane.surface->image, 0, 0, 0, 0, 0, 0,
1162                           surface_width(s->g_plane.surface),
1163                           surface_height(s->g_plane.surface));
1164    pixman_image_set_filter(s->v_plane.surface->image,
1165                            PIXMAN_FILTER_CONVOLUTION, alpha2, 3);
1166    pixman_image_composite(PIXMAN_OP_ADD, s->v_plane.surface->image, 0,
1167                           s->bout_plane.surface->image, 0, 0, 0, 0, 0, 0,
1168                           surface_width(s->g_plane.surface),
1169                           surface_height(s->g_plane.surface));
1170}
1171
1172static void xlnx_dp_update_display(void *opaque)
1173{
1174    XlnxDPState *s = XLNX_DP(opaque);
1175
1176    if ((s->core_registers[DP_TRANSMITTER_ENABLE] & 0x01) == 0) {
1177        return;
1178    }
1179
1180    s->core_registers[DP_INT_STATUS] |= (1 << 13);
1181    xlnx_dp_update_irq(s);
1182
1183    xlnx_dpdma_trigger_vsync_irq(s->dpdma);
1184
1185    /*
1186     * Trigger the DMA channel.
1187     */
1188    if (!xlnx_dpdma_start_operation(s->dpdma, 3, false)) {
1189        /*
1190         * An error occurred don't do anything with the data..
1191         * Trigger an underflow interrupt.
1192         */
1193        s->core_registers[DP_INT_STATUS] |= (1 << 21);
1194        xlnx_dp_update_irq(s);
1195        return;
1196    }
1197
1198    if (xlnx_dp_global_alpha_enabled(s)) {
1199        if (!xlnx_dpdma_start_operation(s->dpdma, 0, false)) {
1200            s->core_registers[DP_INT_STATUS] |= (1 << 21);
1201            xlnx_dp_update_irq(s);
1202            return;
1203        }
1204        xlnx_dp_blend_surface(s);
1205    }
1206
1207    /*
1208     * XXX: We might want to update only what changed.
1209     */
1210    dpy_gfx_update_full(s->console);
1211}
1212
1213static const GraphicHwOps xlnx_dp_gfx_ops = {
1214    .gfx_update  = xlnx_dp_update_display,
1215};
1216
1217static void xlnx_dp_init(Object *obj)
1218{
1219    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
1220    XlnxDPState *s = XLNX_DP(obj);
1221
1222    memory_region_init(&s->container, obj, TYPE_XLNX_DP, 0xC050);
1223
1224    memory_region_init_io(&s->core_iomem, obj, &dp_ops, s, TYPE_XLNX_DP
1225                          ".core", 0x3AF);
1226    memory_region_add_subregion(&s->container, 0x0000, &s->core_iomem);
1227
1228    memory_region_init_io(&s->vblend_iomem, obj, &vblend_ops, s, TYPE_XLNX_DP
1229                          ".v_blend", 0x1DF);
1230    memory_region_add_subregion(&s->container, 0xA000, &s->vblend_iomem);
1231
1232    memory_region_init_io(&s->avbufm_iomem, obj, &avbufm_ops, s, TYPE_XLNX_DP
1233                          ".av_buffer_manager", 0x238);
1234    memory_region_add_subregion(&s->container, 0xB000, &s->avbufm_iomem);
1235
1236    memory_region_init_io(&s->audio_iomem, obj, &audio_ops, s, TYPE_XLNX_DP
1237                          ".audio", sizeof(s->audio_registers));
1238    memory_region_add_subregion(&s->container, 0xC000, &s->audio_iomem);
1239
1240    sysbus_init_mmio(sbd, &s->container);
1241    sysbus_init_irq(sbd, &s->irq);
1242
1243    object_property_add_link(obj, "dpdma", TYPE_XLNX_DPDMA,
1244                             (Object **) &s->dpdma,
1245                             xlnx_dp_set_dpdma,
1246                             OBJ_PROP_LINK_STRONG);
1247
1248    /*
1249     * Initialize AUX Bus.
1250     */
1251    s->aux_bus = aux_bus_init(DEVICE(obj), "aux");
1252
1253    /*
1254     * Initialize DPCD and EDID..
1255     */
1256    s->dpcd = DPCD(qdev_new("dpcd"));
1257    object_property_add_child(OBJECT(s), "dpcd", OBJECT(s->dpcd));
1258
1259    s->edid = I2CDDC(qdev_new("i2c-ddc"));
1260    i2c_slave_set_address(I2C_SLAVE(s->edid), 0x50);
1261    object_property_add_child(OBJECT(s), "edid", OBJECT(s->edid));
1262
1263    fifo8_create(&s->rx_fifo, 16);
1264    fifo8_create(&s->tx_fifo, 16);
1265}
1266
1267static void xlnx_dp_finalize(Object *obj)
1268{
1269    XlnxDPState *s = XLNX_DP(obj);
1270
1271    fifo8_destroy(&s->tx_fifo);
1272    fifo8_destroy(&s->rx_fifo);
1273}
1274
1275static void xlnx_dp_realize(DeviceState *dev, Error **errp)
1276{
1277    XlnxDPState *s = XLNX_DP(dev);
1278    DisplaySurface *surface;
1279    struct audsettings as;
1280
1281    aux_bus_realize(s->aux_bus);
1282
1283    qdev_realize(DEVICE(s->dpcd), BUS(s->aux_bus), &error_fatal);
1284    aux_map_slave(AUX_SLAVE(s->dpcd), 0x0000);
1285
1286    qdev_realize_and_unref(DEVICE(s->edid), BUS(aux_get_i2c_bus(s->aux_bus)),
1287                           &error_fatal);
1288
1289    s->console = graphic_console_init(dev, 0, &xlnx_dp_gfx_ops, s);
1290    surface = qemu_console_surface(s->console);
1291    xlnx_dpdma_set_host_data_location(s->dpdma, DP_GRAPHIC_DMA_CHANNEL,
1292                                      surface_data(surface));
1293
1294    as.freq = 44100;
1295    as.nchannels = 2;
1296    as.fmt = AUDIO_FORMAT_S16;
1297    as.endianness = 0;
1298
1299    AUD_register_card("xlnx_dp.audio", &s->aud_card);
1300
1301    s->amixer_output_stream = AUD_open_out(&s->aud_card,
1302                                           s->amixer_output_stream,
1303                                           "xlnx_dp.audio.out",
1304                                           s,
1305                                           xlnx_dp_audio_callback,
1306                                           &as);
1307    AUD_set_volume_out(s->amixer_output_stream, 0, 255, 255);
1308    xlnx_dp_audio_activate(s);
1309}
1310
1311static void xlnx_dp_reset(DeviceState *dev)
1312{
1313    XlnxDPState *s = XLNX_DP(dev);
1314
1315    memset(s->core_registers, 0, sizeof(s->core_registers));
1316    s->core_registers[DP_VERSION_REGISTER] = 0x04010000;
1317    s->core_registers[DP_CORE_ID] = 0x01020000;
1318    s->core_registers[DP_REPLY_STATUS] = 0x00000010;
1319    s->core_registers[DP_MSA_TRANSFER_UNIT_SIZE] = 0x00000040;
1320    s->core_registers[DP_INIT_WAIT] = 0x00000020;
1321    s->core_registers[DP_PHY_RESET] = 0x00010003;
1322    s->core_registers[DP_INT_MASK] = 0xFFFFF03F;
1323    s->core_registers[DP_PHY_STATUS] = 0x00000043;
1324    s->core_registers[DP_INTERRUPT_SIGNAL_STATE] = 0x00000001;
1325
1326    s->vblend_registers[V_BLEND_RGB2YCBCR_COEFF(0)] = 0x00001000;
1327    s->vblend_registers[V_BLEND_RGB2YCBCR_COEFF(4)] = 0x00001000;
1328    s->vblend_registers[V_BLEND_RGB2YCBCR_COEFF(8)] = 0x00001000;
1329    s->vblend_registers[V_BLEND_IN1CSC_COEFF(0)] = 0x00001000;
1330    s->vblend_registers[V_BLEND_IN1CSC_COEFF(4)] = 0x00001000;
1331    s->vblend_registers[V_BLEND_IN1CSC_COEFF(8)] = 0x00001000;
1332    s->vblend_registers[V_BLEND_IN2CSC_COEFF(0)] = 0x00001000;
1333    s->vblend_registers[V_BLEND_IN2CSC_COEFF(4)] = 0x00001000;
1334    s->vblend_registers[V_BLEND_IN2CSC_COEFF(8)] = 0x00001000;
1335
1336    s->avbufm_registers[AV_BUF_NON_LIVE_LATENCY] = 0x00000180;
1337    s->avbufm_registers[AV_BUF_OUTPUT_AUDIO_VIDEO_SELECT] = 0x00000008;
1338    s->avbufm_registers[AV_BUF_DITHER_CONFIG_MAX] = 0x00000FFF;
1339    s->avbufm_registers[AV_BUF_GRAPHICS_COMP_SCALE_FACTOR(0)] = 0x00010101;
1340    s->avbufm_registers[AV_BUF_GRAPHICS_COMP_SCALE_FACTOR(1)] = 0x00010101;
1341    s->avbufm_registers[AV_BUF_GRAPHICS_COMP_SCALE_FACTOR(2)] = 0x00010101;
1342    s->avbufm_registers[AV_BUF_VIDEO_COMP_SCALE_FACTOR(0)] = 0x00010101;
1343    s->avbufm_registers[AV_BUF_VIDEO_COMP_SCALE_FACTOR(1)] = 0x00010101;
1344    s->avbufm_registers[AV_BUF_VIDEO_COMP_SCALE_FACTOR(2)] = 0x00010101;
1345    s->avbufm_registers[AV_BUF_LIVE_VIDEO_COMP_SF(0)] = 0x00010101;
1346    s->avbufm_registers[AV_BUF_LIVE_VIDEO_COMP_SF(1)] = 0x00010101;
1347    s->avbufm_registers[AV_BUF_LIVE_VIDEO_COMP_SF(2)] = 0x00010101;
1348    s->avbufm_registers[AV_BUF_LIVE_GFX_COMP_SF(0)] = 0x00010101;
1349    s->avbufm_registers[AV_BUF_LIVE_GFX_COMP_SF(1)] = 0x00010101;
1350    s->avbufm_registers[AV_BUF_LIVE_GFX_COMP_SF(2)] = 0x00010101;
1351
1352    memset(s->audio_registers, 0, sizeof(s->audio_registers));
1353    s->byte_left = 0;
1354
1355    xlnx_dp_aux_clear_rx_fifo(s);
1356    xlnx_dp_change_graphic_fmt(s);
1357    xlnx_dp_update_irq(s);
1358}
1359
1360static void xlnx_dp_class_init(ObjectClass *oc, void *data)
1361{
1362    DeviceClass *dc = DEVICE_CLASS(oc);
1363
1364    dc->realize = xlnx_dp_realize;
1365    dc->vmsd = &vmstate_dp;
1366    dc->reset = xlnx_dp_reset;
1367}
1368
1369static const TypeInfo xlnx_dp_info = {
1370    .name          = TYPE_XLNX_DP,
1371    .parent        = TYPE_SYS_BUS_DEVICE,
1372    .instance_size = sizeof(XlnxDPState),
1373    .instance_init = xlnx_dp_init,
1374    .instance_finalize = xlnx_dp_finalize,
1375    .class_init    = xlnx_dp_class_init,
1376};
1377
1378static void xlnx_dp_register_types(void)
1379{
1380    type_register_static(&xlnx_dp_info);
1381}
1382
1383type_init(xlnx_dp_register_types)
1384