1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4 * Author: Chris Zhong <zyw@rock-chips.com>
8 #include <linux/device.h>
9 #include <linux/delay.h>
11 #include <linux/iopoll.h>
12 #include <linux/reset.h>
14 #include "cdn-dp-core.h"
15 #include "cdn-dp-reg.h"
17 #define CDN_DP_SPDIF_CLK 200000000
18 #define FW_ALIVE_TIMEOUT_US 1000000
19 #define MAILBOX_RETRY_US 1000
20 #define MAILBOX_TIMEOUT_US 5000000
21 #define LINK_TRAINING_RETRY_MS 20
22 #define LINK_TRAINING_TIMEOUT_MS 500
24 void cdn_dp_set_fw_clk(struct cdn_dp_device *dp, unsigned long clk)
26 writel(clk / 1000000, dp->regs + SW_CLK_H);
29 void cdn_dp_clock_reset(struct cdn_dp_device *dp)
33 val = DPTX_FRMR_DATA_CLK_RSTN_EN |
34 DPTX_FRMR_DATA_CLK_EN |
35 DPTX_PHY_DATA_RSTN_EN |
36 DPTX_PHY_DATA_CLK_EN |
37 DPTX_PHY_CHAR_RSTN_EN |
38 DPTX_PHY_CHAR_CLK_EN |
39 SOURCE_AUX_SYS_CLK_RSTN_EN |
40 SOURCE_AUX_SYS_CLK_EN |
41 DPTX_SYS_CLK_RSTN_EN |
43 CFG_DPTX_VIF_CLK_RSTN_EN |
45 writel(val, dp->regs + SOURCE_DPTX_CAR);
47 val = SOURCE_PHY_RSTN_EN | SOURCE_PHY_CLK_EN;
48 writel(val, dp->regs + SOURCE_PHY_CAR);
50 val = SOURCE_PKT_SYS_RSTN_EN |
51 SOURCE_PKT_SYS_CLK_EN |
52 SOURCE_PKT_DATA_RSTN_EN |
53 SOURCE_PKT_DATA_CLK_EN;
54 writel(val, dp->regs + SOURCE_PKT_CAR);
56 val = SPDIF_CDR_CLK_RSTN_EN |
58 SOURCE_AIF_SYS_RSTN_EN |
59 SOURCE_AIF_SYS_CLK_EN |
60 SOURCE_AIF_CLK_RSTN_EN |
62 writel(val, dp->regs + SOURCE_AIF_CAR);
64 val = SOURCE_CIPHER_SYSTEM_CLK_RSTN_EN |
65 SOURCE_CIPHER_SYS_CLK_EN |
66 SOURCE_CIPHER_CHAR_CLK_RSTN_EN |
67 SOURCE_CIPHER_CHAR_CLK_EN;
68 writel(val, dp->regs + SOURCE_CIPHER_CAR);
70 val = SOURCE_CRYPTO_SYS_CLK_RSTN_EN |
71 SOURCE_CRYPTO_SYS_CLK_EN;
72 writel(val, dp->regs + SOURCE_CRYPTO_CAR);
74 /* enable Mailbox and PIF interrupt */
75 writel(0, dp->regs + APB_INT_MASK);
78 static int cdn_dp_mailbox_read(struct cdn_dp_device *dp)
82 ret = readx_poll_timeout(readl, dp->regs + MAILBOX_EMPTY_ADDR,
83 val, !val, MAILBOX_RETRY_US,
88 return readl(dp->regs + MAILBOX0_RD_DATA) & 0xff;
91 static int cdp_dp_mailbox_write(struct cdn_dp_device *dp, u8 val)
95 ret = readx_poll_timeout(readl, dp->regs + MAILBOX_FULL_ADDR,
96 full, !full, MAILBOX_RETRY_US,
101 writel(val, dp->regs + MAILBOX0_WR_DATA);
106 static int cdn_dp_mailbox_validate_receive(struct cdn_dp_device *dp,
107 u8 module_id, u8 opcode,
114 /* read the header of the message */
115 for (i = 0; i < 4; i++) {
116 ret = cdn_dp_mailbox_read(dp);
123 mbox_size = (header[2] << 8) | header[3];
125 if (opcode != header[0] || module_id != header[1] ||
126 req_size != mbox_size) {
128 * If the message in mailbox is not what we want, we need to
129 * clear the mailbox by reading its contents.
131 for (i = 0; i < mbox_size; i++)
132 if (cdn_dp_mailbox_read(dp) < 0)
141 static int cdn_dp_mailbox_read_receive(struct cdn_dp_device *dp,
142 u8 *buff, u16 buff_size)
147 for (i = 0; i < buff_size; i++) {
148 ret = cdn_dp_mailbox_read(dp);
158 static int cdn_dp_mailbox_send(struct cdn_dp_device *dp, u8 module_id,
159 u8 opcode, u16 size, u8 *message)
165 header[1] = module_id;
166 header[2] = (size >> 8) & 0xff;
167 header[3] = size & 0xff;
169 for (i = 0; i < 4; i++) {
170 ret = cdp_dp_mailbox_write(dp, header[i]);
175 for (i = 0; i < size; i++) {
176 ret = cdp_dp_mailbox_write(dp, message[i]);
184 static int cdn_dp_reg_write(struct cdn_dp_device *dp, u16 addr, u32 val)
188 msg[0] = (addr >> 8) & 0xff;
189 msg[1] = addr & 0xff;
190 msg[2] = (val >> 24) & 0xff;
191 msg[3] = (val >> 16) & 0xff;
192 msg[4] = (val >> 8) & 0xff;
194 return cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_WRITE_REGISTER,
198 static int cdn_dp_reg_write_bit(struct cdn_dp_device *dp, u16 addr,
199 u8 start_bit, u8 bits_no, u32 val)
203 field[0] = (addr >> 8) & 0xff;
204 field[1] = addr & 0xff;
205 field[2] = start_bit;
207 field[4] = (val >> 24) & 0xff;
208 field[5] = (val >> 16) & 0xff;
209 field[6] = (val >> 8) & 0xff;
210 field[7] = val & 0xff;
212 return cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_WRITE_FIELD,
213 sizeof(field), field);
216 int cdn_dp_dpcd_read(struct cdn_dp_device *dp, u32 addr, u8 *data, u16 len)
221 msg[0] = (len >> 8) & 0xff;
223 msg[2] = (addr >> 16) & 0xff;
224 msg[3] = (addr >> 8) & 0xff;
225 msg[4] = addr & 0xff;
226 ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_READ_DPCD,
231 ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX,
237 ret = cdn_dp_mailbox_read_receive(dp, reg, sizeof(reg));
241 ret = cdn_dp_mailbox_read_receive(dp, data, len);
247 int cdn_dp_dpcd_write(struct cdn_dp_device *dp, u32 addr, u8 value)
254 msg[2] = (addr >> 16) & 0xff;
255 msg[3] = (addr >> 8) & 0xff;
256 msg[4] = addr & 0xff;
258 ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_WRITE_DPCD,
263 ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX,
264 DPTX_WRITE_DPCD, sizeof(reg));
268 ret = cdn_dp_mailbox_read_receive(dp, reg, sizeof(reg));
272 if (addr != (reg[2] << 16 | reg[3] << 8 | reg[4]))
277 DRM_DEV_ERROR(dp->dev, "dpcd write failed: %d\n", ret);
281 int cdn_dp_load_firmware(struct cdn_dp_device *dp, const u32 *i_mem,
282 u32 i_size, const u32 *d_mem, u32 d_size)
287 /* reset ucpu before load firmware*/
288 writel(APB_IRAM_PATH | APB_DRAM_PATH | APB_XT_RESET,
289 dp->regs + APB_CTRL);
291 for (i = 0; i < i_size; i += 4)
292 writel(*i_mem++, dp->regs + ADDR_IMEM + i);
294 for (i = 0; i < d_size; i += 4)
295 writel(*d_mem++, dp->regs + ADDR_DMEM + i);
298 writel(0, dp->regs + APB_CTRL);
300 /* check the keep alive register to make sure fw working */
301 ret = readx_poll_timeout(readl, dp->regs + KEEP_ALIVE,
302 reg, reg, 2000, FW_ALIVE_TIMEOUT_US);
304 DRM_DEV_ERROR(dp->dev, "failed to loaded the FW reg = %x\n",
309 reg = readl(dp->regs + VER_L) & 0xff;
310 dp->fw_version = reg;
311 reg = readl(dp->regs + VER_H) & 0xff;
312 dp->fw_version |= reg << 8;
313 reg = readl(dp->regs + VER_LIB_L_ADDR) & 0xff;
314 dp->fw_version |= reg << 16;
315 reg = readl(dp->regs + VER_LIB_H_ADDR) & 0xff;
316 dp->fw_version |= reg << 24;
318 DRM_DEV_DEBUG(dp->dev, "firmware version: %x\n", dp->fw_version);
323 int cdn_dp_set_firmware_active(struct cdn_dp_device *dp, bool enable)
328 msg[0] = GENERAL_MAIN_CONTROL;
329 msg[1] = MB_MODULE_ID_GENERAL;
332 msg[4] = enable ? FW_ACTIVE : FW_STANDBY;
334 for (i = 0; i < sizeof(msg); i++) {
335 ret = cdp_dp_mailbox_write(dp, msg[i]);
337 goto err_set_firmware_active;
340 /* read the firmware state */
341 for (i = 0; i < sizeof(msg); i++) {
342 ret = cdn_dp_mailbox_read(dp);
344 goto err_set_firmware_active;
351 err_set_firmware_active:
353 DRM_DEV_ERROR(dp->dev, "set firmware active failed\n");
357 int cdn_dp_set_host_cap(struct cdn_dp_device *dp, u8 lanes, bool flip)
362 msg[0] = CDN_DP_MAX_LINK_RATE;
363 msg[1] = lanes | SCRAMBLER_EN;
364 msg[2] = VOLTAGE_LEVEL_2;
365 msg[3] = PRE_EMPHASIS_LEVEL_3;
366 msg[4] = PTS1 | PTS2 | PTS3 | PTS4;
367 msg[5] = FAST_LT_NOT_SUPPORT;
368 msg[6] = flip ? LANE_MAPPING_FLIPPED : LANE_MAPPING_NORMAL;
371 ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX,
372 DPTX_SET_HOST_CAPABILITIES,
375 goto err_set_host_cap;
377 ret = cdn_dp_reg_write(dp, DP_AUX_SWAP_INVERSION_CONTROL,
382 DRM_DEV_ERROR(dp->dev, "set host cap failed: %d\n", ret);
386 int cdn_dp_event_config(struct cdn_dp_device *dp)
391 memset(msg, 0, sizeof(msg));
393 msg[0] = DPTX_EVENT_ENABLE_HPD | DPTX_EVENT_ENABLE_TRAINING;
395 ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_ENABLE_EVENT,
398 DRM_DEV_ERROR(dp->dev, "set event config failed: %d\n", ret);
403 u32 cdn_dp_get_event(struct cdn_dp_device *dp)
405 return readl(dp->regs + SW_EVENTS0);
408 int cdn_dp_get_hpd_status(struct cdn_dp_device *dp)
413 ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_HPD_STATE,
418 ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX,
419 DPTX_HPD_STATE, sizeof(status));
423 ret = cdn_dp_mailbox_read_receive(dp, &status, sizeof(status));
430 DRM_DEV_ERROR(dp->dev, "get hpd status failed: %d\n", ret);
434 int cdn_dp_get_edid_block(void *data, u8 *edid,
435 unsigned int block, size_t length)
437 struct cdn_dp_device *dp = data;
438 u8 msg[2], reg[2], i;
441 for (i = 0; i < 4; i++) {
445 ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_GET_EDID,
450 ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX,
452 sizeof(reg) + length);
456 ret = cdn_dp_mailbox_read_receive(dp, reg, sizeof(reg));
460 ret = cdn_dp_mailbox_read_receive(dp, edid, length);
464 if (reg[0] == length && reg[1] == block / 2)
469 DRM_DEV_ERROR(dp->dev, "get block[%d] edid failed: %d\n", block,
475 static int cdn_dp_training_start(struct cdn_dp_device *dp)
477 unsigned long timeout;
481 msg = LINK_TRAINING_RUN;
484 ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_TRAINING_CONTROL,
487 goto err_training_start;
489 timeout = jiffies + msecs_to_jiffies(LINK_TRAINING_TIMEOUT_MS);
490 while (time_before(jiffies, timeout)) {
491 msleep(LINK_TRAINING_RETRY_MS);
492 ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX,
493 DPTX_READ_EVENT, 0, NULL);
495 goto err_training_start;
497 ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX,
501 goto err_training_start;
503 ret = cdn_dp_mailbox_read_receive(dp, event, sizeof(event));
505 goto err_training_start;
507 if (event[1] & EQ_PHASE_FINISHED)
514 DRM_DEV_ERROR(dp->dev, "training failed: %d\n", ret);
518 static int cdn_dp_get_training_status(struct cdn_dp_device *dp)
523 ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_READ_LINK_STAT,
526 goto err_get_training_status;
528 ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX,
532 goto err_get_training_status;
534 ret = cdn_dp_mailbox_read_receive(dp, status, sizeof(status));
536 goto err_get_training_status;
538 dp->max_rate = drm_dp_bw_code_to_link_rate(status[0]);
539 dp->max_lanes = status[1];
541 err_get_training_status:
543 DRM_DEV_ERROR(dp->dev, "get training status failed: %d\n", ret);
547 int cdn_dp_train_link(struct cdn_dp_device *dp)
551 ret = cdn_dp_training_start(dp);
553 DRM_DEV_ERROR(dp->dev, "Failed to start training %d\n", ret);
557 ret = cdn_dp_get_training_status(dp);
559 DRM_DEV_ERROR(dp->dev, "Failed to get training stat %d\n", ret);
563 DRM_DEV_DEBUG_KMS(dp->dev, "rate:0x%x, lanes:%d\n", dp->max_rate,
568 int cdn_dp_set_video_status(struct cdn_dp_device *dp, int active)
575 ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_SET_VIDEO,
578 DRM_DEV_ERROR(dp->dev, "set video status failed: %d\n", ret);
583 static int cdn_dp_get_msa_misc(struct video_info *video,
584 struct drm_display_mode *mode)
589 switch (video->color_fmt) {
594 /* set YUV default color space conversion to BT601 */
596 val[0] = 6 + BT_601 * 8;
599 val[0] = 5 + BT_601 * 8;
606 switch (video->color_depth) {
624 msa_misc = 2 * val[0] + 32 * val[1] +
625 ((video->color_fmt == Y_ONLY) ? (1 << 14) : 0);
630 int cdn_dp_config_video(struct cdn_dp_device *dp)
632 struct video_info *video = &dp->video_info;
633 struct drm_display_mode *mode = &dp->mode;
635 u32 val, link_rate, rem;
636 u8 bit_per_pix, tu_size_reg = TU_SIZE;
639 bit_per_pix = (video->color_fmt == YCBCR_4_2_2) ?
640 (video->color_depth * 2) : (video->color_depth * 3);
642 link_rate = dp->max_rate / 1000;
644 ret = cdn_dp_reg_write(dp, BND_HSYNC2VSYNC, VIF_BYPASS_INTERLACE);
646 goto err_config_video;
648 ret = cdn_dp_reg_write(dp, HSYNC2VSYNC_POL_CTRL, 0);
650 goto err_config_video;
653 * get a best tu_size and valid symbol:
654 * 1. chose Lclk freq(162Mhz, 270Mhz, 540Mhz), set TU to 32
655 * 2. calculate VS(valid symbol) = TU * Pclk * Bpp / (Lclk * Lanes)
656 * 3. if VS > *.85 or VS < *.1 or VS < 2 or TU < VS + 4, then set
657 * TU += 2 and repeat 2nd step.
661 symbol = (u64)tu_size_reg * mode->clock * bit_per_pix;
662 do_div(symbol, dp->max_lanes * link_rate * 8);
663 rem = do_div(symbol, 1000);
664 if (tu_size_reg > 64) {
666 DRM_DEV_ERROR(dp->dev,
667 "tu error, clk:%d, lanes:%d, rate:%d\n",
668 mode->clock, dp->max_lanes, link_rate);
669 goto err_config_video;
671 } while ((symbol <= 1) || (tu_size_reg - symbol < 4) ||
672 (rem > 850) || (rem < 100));
674 val = symbol + (tu_size_reg << 8);
675 val |= TU_CNT_RST_EN;
676 ret = cdn_dp_reg_write(dp, DP_FRAMER_TU, val);
678 goto err_config_video;
680 /* set the FIFO Buffer size */
681 val = div_u64(mode->clock * (symbol + 1), 1000) + link_rate;
682 val /= (dp->max_lanes * link_rate);
683 val = div_u64(8 * (symbol + 1), bit_per_pix) - val;
685 ret = cdn_dp_reg_write(dp, DP_VC_TABLE(15), val);
687 switch (video->color_depth) {
705 val += video->color_fmt << 8;
706 ret = cdn_dp_reg_write(dp, DP_FRAMER_PXL_REPR, val);
708 goto err_config_video;
710 val = video->h_sync_polarity ? DP_FRAMER_SP_HSP : 0;
711 val |= video->v_sync_polarity ? DP_FRAMER_SP_VSP : 0;
712 ret = cdn_dp_reg_write(dp, DP_FRAMER_SP, val);
714 goto err_config_video;
716 val = (mode->hsync_start - mode->hdisplay) << 16;
717 val |= mode->htotal - mode->hsync_end;
718 ret = cdn_dp_reg_write(dp, DP_FRONT_BACK_PORCH, val);
720 goto err_config_video;
722 val = mode->hdisplay * bit_per_pix / 8;
723 ret = cdn_dp_reg_write(dp, DP_BYTE_COUNT, val);
725 goto err_config_video;
727 val = mode->htotal | ((mode->htotal - mode->hsync_start) << 16);
728 ret = cdn_dp_reg_write(dp, MSA_HORIZONTAL_0, val);
730 goto err_config_video;
732 val = mode->hsync_end - mode->hsync_start;
733 val |= (mode->hdisplay << 16) | (video->h_sync_polarity << 15);
734 ret = cdn_dp_reg_write(dp, MSA_HORIZONTAL_1, val);
736 goto err_config_video;
739 val |= (mode->vtotal - mode->vsync_start) << 16;
740 ret = cdn_dp_reg_write(dp, MSA_VERTICAL_0, val);
742 goto err_config_video;
744 val = mode->vsync_end - mode->vsync_start;
745 val |= (mode->vdisplay << 16) | (video->v_sync_polarity << 15);
746 ret = cdn_dp_reg_write(dp, MSA_VERTICAL_1, val);
748 goto err_config_video;
750 val = cdn_dp_get_msa_misc(video, mode);
751 ret = cdn_dp_reg_write(dp, MSA_MISC, val);
753 goto err_config_video;
755 ret = cdn_dp_reg_write(dp, STREAM_CONFIG, 1);
757 goto err_config_video;
759 val = mode->hsync_end - mode->hsync_start;
760 val |= mode->hdisplay << 16;
761 ret = cdn_dp_reg_write(dp, DP_HORIZONTAL, val);
763 goto err_config_video;
765 val = mode->vdisplay;
766 val |= (mode->vtotal - mode->vsync_start) << 16;
767 ret = cdn_dp_reg_write(dp, DP_VERTICAL_0, val);
769 goto err_config_video;
772 ret = cdn_dp_reg_write(dp, DP_VERTICAL_1, val);
774 goto err_config_video;
776 ret = cdn_dp_reg_write_bit(dp, DP_VB_ID, 2, 1, 0);
780 DRM_DEV_ERROR(dp->dev, "config video failed: %d\n", ret);
784 int cdn_dp_audio_stop(struct cdn_dp_device *dp, struct audio_info *audio)
788 ret = cdn_dp_reg_write(dp, AUDIO_PACK_CONTROL, 0);
790 DRM_DEV_ERROR(dp->dev, "audio stop failed: %d\n", ret);
794 writel(0, dp->regs + SPDIF_CTRL_ADDR);
796 /* clearn the audio config and reset */
797 writel(0, dp->regs + AUDIO_SRC_CNTL);
798 writel(0, dp->regs + AUDIO_SRC_CNFG);
799 writel(AUDIO_SW_RST, dp->regs + AUDIO_SRC_CNTL);
800 writel(0, dp->regs + AUDIO_SRC_CNTL);
802 /* reset smpl2pckt component */
803 writel(0, dp->regs + SMPL2PKT_CNTL);
804 writel(AUDIO_SW_RST, dp->regs + SMPL2PKT_CNTL);
805 writel(0, dp->regs + SMPL2PKT_CNTL);
808 writel(AUDIO_SW_RST, dp->regs + FIFO_CNTL);
809 writel(0, dp->regs + FIFO_CNTL);
811 if (audio->format == AFMT_SPDIF)
812 clk_disable_unprepare(dp->spdif_clk);
817 int cdn_dp_audio_mute(struct cdn_dp_device *dp, bool enable)
821 ret = cdn_dp_reg_write_bit(dp, DP_VB_ID, 4, 1, enable);
823 DRM_DEV_ERROR(dp->dev, "audio mute failed: %d\n", ret);
828 static void cdn_dp_audio_config_i2s(struct cdn_dp_device *dp,
829 struct audio_info *audio)
831 int sub_pckt_num = 1, i2s_port_en_val = 0xf, i;
834 if (audio->channels == 2) {
835 if (dp->max_lanes == 1)
841 } else if (audio->channels == 4) {
845 writel(0x0, dp->regs + SPDIF_CTRL_ADDR);
847 writel(SYNC_WR_TO_CH_ZERO, dp->regs + FIFO_CNTL);
849 val = MAX_NUM_CH(audio->channels);
850 val |= NUM_OF_I2S_PORTS(audio->channels);
851 val |= AUDIO_TYPE_LPCM;
852 val |= CFG_SUB_PCKT_NUM(sub_pckt_num);
853 writel(val, dp->regs + SMPL2PKT_CNFG);
855 if (audio->sample_width == 16)
857 else if (audio->sample_width == 24)
862 val |= AUDIO_CH_NUM(audio->channels);
863 val |= I2S_DEC_PORT_EN(i2s_port_en_val);
864 val |= TRANS_SMPL_WIDTH_32;
865 writel(val, dp->regs + AUDIO_SRC_CNFG);
867 for (i = 0; i < (audio->channels + 1) / 2; i++) {
868 if (audio->sample_width == 16)
869 val = (0x02 << 8) | (0x02 << 20);
870 else if (audio->sample_width == 24)
871 val = (0x0b << 8) | (0x0b << 20);
873 val |= ((2 * i) << 4) | ((2 * i + 1) << 16);
874 writel(val, dp->regs + STTS_BIT_CH(i));
877 switch (audio->sample_rate) {
879 val = SAMPLING_FREQ(3) |
880 ORIGINAL_SAMP_FREQ(0xc);
883 val = SAMPLING_FREQ(0) |
884 ORIGINAL_SAMP_FREQ(0xf);
887 val = SAMPLING_FREQ(2) |
888 ORIGINAL_SAMP_FREQ(0xd);
891 val = SAMPLING_FREQ(8) |
892 ORIGINAL_SAMP_FREQ(0x7);
895 val = SAMPLING_FREQ(0xa) |
896 ORIGINAL_SAMP_FREQ(5);
899 val = SAMPLING_FREQ(0xc) |
900 ORIGINAL_SAMP_FREQ(3);
903 val = SAMPLING_FREQ(0xe) |
904 ORIGINAL_SAMP_FREQ(1);
908 writel(val, dp->regs + COM_CH_STTS_BITS);
910 writel(SMPL2PKT_EN, dp->regs + SMPL2PKT_CNTL);
911 writel(I2S_DEC_START, dp->regs + AUDIO_SRC_CNTL);
914 static void cdn_dp_audio_config_spdif(struct cdn_dp_device *dp)
918 writel(SYNC_WR_TO_CH_ZERO, dp->regs + FIFO_CNTL);
920 val = MAX_NUM_CH(2) | AUDIO_TYPE_LPCM | CFG_SUB_PCKT_NUM(4);
921 writel(val, dp->regs + SMPL2PKT_CNFG);
922 writel(SMPL2PKT_EN, dp->regs + SMPL2PKT_CNTL);
924 val = SPDIF_ENABLE | SPDIF_AVG_SEL | SPDIF_JITTER_BYPASS;
925 writel(val, dp->regs + SPDIF_CTRL_ADDR);
927 clk_prepare_enable(dp->spdif_clk);
928 clk_set_rate(dp->spdif_clk, CDN_DP_SPDIF_CLK);
931 int cdn_dp_audio_config(struct cdn_dp_device *dp, struct audio_info *audio)
935 /* reset the spdif clk before config */
936 if (audio->format == AFMT_SPDIF) {
937 reset_control_assert(dp->spdif_rst);
938 reset_control_deassert(dp->spdif_rst);
941 ret = cdn_dp_reg_write(dp, CM_LANE_CTRL, LANE_REF_CYC);
943 goto err_audio_config;
945 ret = cdn_dp_reg_write(dp, CM_CTRL, 0);
947 goto err_audio_config;
949 if (audio->format == AFMT_I2S)
950 cdn_dp_audio_config_i2s(dp, audio);
951 else if (audio->format == AFMT_SPDIF)
952 cdn_dp_audio_config_spdif(dp);
954 ret = cdn_dp_reg_write(dp, AUDIO_PACK_CONTROL, AUDIO_PACK_EN);
958 DRM_DEV_ERROR(dp->dev, "audio config failed: %d\n", ret);