2 * Copyright © 2016 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
26 #include <drm/drm_atomic_helper.h>
27 #include <drm/drm_dp_dual_mode_helper.h>
28 #include <drm/drm_edid.h>
31 #include "intel_display_types.h"
33 #include "intel_lspcon.h"
34 #include "intel_hdmi.h"
36 /* LSPCON OUI Vendor ID(signatures) */
37 #define LSPCON_VENDOR_PARADE_OUI 0x001CF8
38 #define LSPCON_VENDOR_MCA_OUI 0x0060AD
40 #define DPCD_MCA_LSPCON_HDR_STATUS 0x70003
41 #define DPCD_PARADE_LSPCON_HDR_STATUS 0x00511
43 /* AUX addresses to write MCA AVI IF */
44 #define LSPCON_MCA_AVI_IF_WRITE_OFFSET 0x5C0
45 #define LSPCON_MCA_AVI_IF_CTRL 0x5DF
46 #define LSPCON_MCA_AVI_IF_KICKOFF (1 << 0)
47 #define LSPCON_MCA_AVI_IF_HANDLED (1 << 1)
49 /* AUX addresses to write Parade AVI IF */
50 #define LSPCON_PARADE_AVI_IF_WRITE_OFFSET 0x516
51 #define LSPCON_PARADE_AVI_IF_CTRL 0x51E
52 #define LSPCON_PARADE_AVI_IF_KICKOFF (1 << 7)
53 #define LSPCON_PARADE_AVI_IF_DATA_SIZE 32
55 static struct intel_dp *lspcon_to_intel_dp(struct intel_lspcon *lspcon)
57 struct intel_digital_port *dig_port =
58 container_of(lspcon, struct intel_digital_port, lspcon);
63 static const char *lspcon_mode_name(enum drm_lspcon_mode mode)
66 case DRM_LSPCON_MODE_PCON:
68 case DRM_LSPCON_MODE_LS:
70 case DRM_LSPCON_MODE_INVALID:
78 static bool lspcon_detect_vendor(struct intel_lspcon *lspcon)
80 struct intel_dp *dp = lspcon_to_intel_dp(lspcon);
81 struct drm_dp_dpcd_ident *ident;
84 if (drm_dp_read_desc(&dp->aux, &dp->desc, drm_dp_is_branch(dp->dpcd))) {
85 DRM_ERROR("Can't read description\n");
89 ident = &dp->desc.ident;
90 vendor_oui = (ident->oui[0] << 16) | (ident->oui[1] << 8) |
94 case LSPCON_VENDOR_MCA_OUI:
95 lspcon->vendor = LSPCON_VENDOR_MCA;
96 DRM_DEBUG_KMS("Vendor: Mega Chips\n");
99 case LSPCON_VENDOR_PARADE_OUI:
100 lspcon->vendor = LSPCON_VENDOR_PARADE;
101 DRM_DEBUG_KMS("Vendor: Parade Tech\n");
105 DRM_ERROR("Invalid/Unknown vendor OUI\n");
112 static u32 get_hdr_status_reg(struct intel_lspcon *lspcon)
114 if (lspcon->vendor == LSPCON_VENDOR_MCA)
115 return DPCD_MCA_LSPCON_HDR_STATUS;
117 return DPCD_PARADE_LSPCON_HDR_STATUS;
120 void lspcon_detect_hdr_capability(struct intel_lspcon *lspcon)
122 struct intel_digital_port *dig_port =
123 container_of(lspcon, struct intel_digital_port, lspcon);
124 struct drm_device *dev = dig_port->base.base.dev;
125 struct intel_dp *dp = lspcon_to_intel_dp(lspcon);
129 ret = drm_dp_dpcd_read(&dp->aux, get_hdr_status_reg(lspcon),
133 drm_dbg_kms(dev, "HDR capability detection failed\n");
134 lspcon->hdr_supported = false;
135 } else if (hdr_caps & 0x1) {
136 drm_dbg_kms(dev, "LSPCON capable of HDR\n");
137 lspcon->hdr_supported = true;
141 static enum drm_lspcon_mode lspcon_get_current_mode(struct intel_lspcon *lspcon)
143 struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
144 enum drm_lspcon_mode current_mode;
145 struct i2c_adapter *adapter = &intel_dp->aux.ddc;
147 if (drm_lspcon_get_mode(intel_dp->aux.drm_dev, adapter, ¤t_mode)) {
148 DRM_DEBUG_KMS("Error reading LSPCON mode\n");
149 return DRM_LSPCON_MODE_INVALID;
154 static enum drm_lspcon_mode lspcon_wait_mode(struct intel_lspcon *lspcon,
155 enum drm_lspcon_mode mode)
157 enum drm_lspcon_mode current_mode;
159 current_mode = lspcon_get_current_mode(lspcon);
160 if (current_mode == mode)
163 DRM_DEBUG_KMS("Waiting for LSPCON mode %s to settle\n",
164 lspcon_mode_name(mode));
166 wait_for((current_mode = lspcon_get_current_mode(lspcon)) == mode, 400);
167 if (current_mode != mode)
168 DRM_ERROR("LSPCON mode hasn't settled\n");
171 DRM_DEBUG_KMS("Current LSPCON mode %s\n",
172 lspcon_mode_name(current_mode));
177 static int lspcon_change_mode(struct intel_lspcon *lspcon,
178 enum drm_lspcon_mode mode)
180 struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
182 enum drm_lspcon_mode current_mode;
183 struct i2c_adapter *adapter = &intel_dp->aux.ddc;
185 err = drm_lspcon_get_mode(intel_dp->aux.drm_dev, adapter, ¤t_mode);
187 DRM_ERROR("Error reading LSPCON mode\n");
191 if (current_mode == mode) {
192 DRM_DEBUG_KMS("Current mode = desired LSPCON mode\n");
196 err = drm_lspcon_set_mode(intel_dp->aux.drm_dev, adapter, mode);
198 DRM_ERROR("LSPCON mode change failed\n");
203 DRM_DEBUG_KMS("LSPCON mode changed done\n");
207 static bool lspcon_wake_native_aux_ch(struct intel_lspcon *lspcon)
211 if (drm_dp_dpcd_readb(&lspcon_to_intel_dp(lspcon)->aux, DP_DPCD_REV,
213 DRM_DEBUG_KMS("Native AUX CH down\n");
217 DRM_DEBUG_KMS("Native AUX CH up, DPCD version: %d.%d\n",
218 rev >> 4, rev & 0xf);
223 static bool lspcon_probe(struct intel_lspcon *lspcon)
226 enum drm_dp_dual_mode_type adaptor_type;
227 struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
228 struct i2c_adapter *adapter = &intel_dp->aux.ddc;
229 enum drm_lspcon_mode expected_mode;
231 expected_mode = lspcon_wake_native_aux_ch(lspcon) ?
232 DRM_LSPCON_MODE_PCON : DRM_LSPCON_MODE_LS;
234 /* Lets probe the adaptor and check its type */
235 for (retry = 0; retry < 6; retry++) {
237 usleep_range(500, 1000);
239 adaptor_type = drm_dp_dual_mode_detect(intel_dp->aux.drm_dev, adapter);
240 if (adaptor_type == DRM_DP_DUAL_MODE_LSPCON)
244 if (adaptor_type != DRM_DP_DUAL_MODE_LSPCON) {
245 DRM_DEBUG_KMS("No LSPCON detected, found %s\n",
246 drm_dp_get_dual_mode_type_name(adaptor_type));
250 /* Yay ... got a LSPCON device */
251 DRM_DEBUG_KMS("LSPCON detected\n");
252 lspcon->mode = lspcon_wait_mode(lspcon, expected_mode);
255 * In the SW state machine, lets Put LSPCON in PCON mode only.
256 * In this way, it will work with both HDMI 1.4 sinks as well as HDMI
259 if (lspcon->mode != DRM_LSPCON_MODE_PCON) {
260 if (lspcon_change_mode(lspcon, DRM_LSPCON_MODE_PCON) < 0) {
261 DRM_ERROR("LSPCON mode change to PCON failed\n");
268 static void lspcon_resume_in_pcon_wa(struct intel_lspcon *lspcon)
270 struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
271 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
272 unsigned long start = jiffies;
275 if (intel_digital_port_connected(&dig_port->base)) {
276 DRM_DEBUG_KMS("LSPCON recovering in PCON mode after %u ms\n",
277 jiffies_to_msecs(jiffies - start));
281 if (time_after(jiffies, start + msecs_to_jiffies(1000)))
284 usleep_range(10000, 15000);
287 DRM_DEBUG_KMS("LSPCON DP descriptor mismatch after resume\n");
290 static bool lspcon_parade_fw_ready(struct drm_dp_aux *aux)
296 /* Check if LSPCON FW is ready for data */
297 for (retry = 0; retry < 5; retry++) {
299 usleep_range(200, 300);
301 ret = drm_dp_dpcd_read(aux, LSPCON_PARADE_AVI_IF_CTRL,
304 DRM_ERROR("Failed to read AVI IF control\n");
308 if ((avi_if_ctrl & LSPCON_PARADE_AVI_IF_KICKOFF) == 0)
312 DRM_ERROR("Parade FW not ready to accept AVI IF\n");
316 static bool _lspcon_parade_write_infoframe_blocks(struct drm_dp_aux *aux,
325 while (block_count < 4) {
326 if (!lspcon_parade_fw_ready(aux)) {
327 DRM_DEBUG_KMS("LSPCON FW not ready, block %d\n",
332 reg = LSPCON_PARADE_AVI_IF_WRITE_OFFSET;
333 data = avi_buf + block_count * 8;
334 ret = drm_dp_dpcd_write(aux, reg, data, 8);
336 DRM_ERROR("Failed to write AVI IF block %d\n",
342 * Once a block of data is written, we have to inform the FW
343 * about this by writing into avi infoframe control register:
344 * - set the kickoff bit[7] to 1
345 * - write the block no. to bits[1:0]
347 reg = LSPCON_PARADE_AVI_IF_CTRL;
348 avi_if_ctrl = LSPCON_PARADE_AVI_IF_KICKOFF | block_count;
349 ret = drm_dp_dpcd_write(aux, reg, &avi_if_ctrl, 1);
351 DRM_ERROR("Failed to update (0x%x), block %d\n",
359 DRM_DEBUG_KMS("Wrote AVI IF blocks successfully\n");
363 static bool _lspcon_write_avi_infoframe_parade(struct drm_dp_aux *aux,
367 u8 avi_if[LSPCON_PARADE_AVI_IF_DATA_SIZE] = {1, };
370 * Parade's frames contains 32 bytes of data, divided
372 * Token byte (first byte of first frame, must be non-zero)
373 * HB0 to HB2 from AVI IF (3 bytes header)
374 * PB0 to PB27 from AVI IF (28 bytes data)
375 * So it should look like this
376 * first block: | <token> <HB0-HB2> <DB0-DB3> |
377 * next 3 blocks: |<DB4-DB11>|<DB12-DB19>|<DB20-DB28>|
380 if (len > LSPCON_PARADE_AVI_IF_DATA_SIZE - 1) {
381 DRM_ERROR("Invalid length of infoframes\n");
385 memcpy(&avi_if[1], frame, len);
387 if (!_lspcon_parade_write_infoframe_blocks(aux, avi_if)) {
388 DRM_DEBUG_KMS("Failed to write infoframe blocks\n");
395 static bool _lspcon_write_avi_infoframe_mca(struct drm_dp_aux *aux,
396 const u8 *buffer, ssize_t len)
402 const u8 *data = buffer;
404 reg = LSPCON_MCA_AVI_IF_WRITE_OFFSET;
406 /* DPCD write for AVI IF can fail on a slow FW day, so retry */
407 for (retry = 0; retry < 5; retry++) {
408 ret = drm_dp_dpcd_write(aux, reg, (void *)data, 1);
411 } else if (retry < 4) {
415 DRM_ERROR("DPCD write failed at:0x%x\n", reg);
419 val++; reg++; data++;
423 reg = LSPCON_MCA_AVI_IF_CTRL;
424 ret = drm_dp_dpcd_read(aux, reg, &val, 1);
426 DRM_ERROR("DPCD read failed, address 0x%x\n", reg);
430 /* Indicate LSPCON chip about infoframe, clear bit 1 and set bit 0 */
431 val &= ~LSPCON_MCA_AVI_IF_HANDLED;
432 val |= LSPCON_MCA_AVI_IF_KICKOFF;
434 ret = drm_dp_dpcd_write(aux, reg, &val, 1);
436 DRM_ERROR("DPCD read failed, address 0x%x\n", reg);
441 ret = drm_dp_dpcd_read(aux, reg, &val, 1);
443 DRM_ERROR("DPCD read failed, address 0x%x\n", reg);
447 if (val == LSPCON_MCA_AVI_IF_HANDLED)
448 DRM_DEBUG_KMS("AVI IF handled by FW\n");
453 void lspcon_write_infoframe(struct intel_encoder *encoder,
454 const struct intel_crtc_state *crtc_state,
456 const void *frame, ssize_t len)
459 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
460 struct intel_lspcon *lspcon = enc_to_intel_lspcon(encoder);
463 case HDMI_INFOFRAME_TYPE_AVI:
464 if (lspcon->vendor == LSPCON_VENDOR_MCA)
465 ret = _lspcon_write_avi_infoframe_mca(&intel_dp->aux,
468 ret = _lspcon_write_avi_infoframe_parade(&intel_dp->aux,
471 case HDMI_PACKET_TYPE_GAMUT_METADATA:
472 drm_dbg_kms(encoder->base.dev, "Update HDR metadata for lspcon\n");
473 /* It uses the legacy hsw implementation for the same */
474 hsw_write_infoframe(encoder, crtc_state, type, frame, len);
481 DRM_ERROR("Failed to write infoframes\n");
486 void lspcon_read_infoframe(struct intel_encoder *encoder,
487 const struct intel_crtc_state *crtc_state,
489 void *frame, ssize_t len)
491 /* FIXME implement for AVI Infoframe as well */
492 if (type == HDMI_PACKET_TYPE_GAMUT_METADATA)
493 hsw_read_infoframe(encoder, crtc_state, type,
497 void lspcon_set_infoframes(struct intel_encoder *encoder,
499 const struct intel_crtc_state *crtc_state,
500 const struct drm_connector_state *conn_state)
503 union hdmi_infoframe frame;
504 u8 buf[VIDEO_DIP_DATA_SIZE];
505 struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
506 struct intel_lspcon *lspcon = &dig_port->lspcon;
507 const struct drm_display_mode *adjusted_mode =
508 &crtc_state->hw.adjusted_mode;
510 if (!lspcon->active) {
511 DRM_ERROR("Writing infoframes while LSPCON disabled ?\n");
515 /* FIXME precompute infoframes */
517 ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
518 conn_state->connector,
521 DRM_ERROR("couldn't fill AVI infoframe\n");
526 * Currently there is no interface defined to
527 * check user preference between RGB/YCBCR444
528 * or YCBCR420. So the only possible case for
529 * YCBCR444 usage is driving YCBCR420 output
530 * with LSPCON, when pipe is configured for
531 * YCBCR444 output and LSPCON takes care of
534 if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444)
535 frame.avi.colorspace = HDMI_COLORSPACE_YUV420;
537 frame.avi.colorspace = HDMI_COLORSPACE_RGB;
539 /* Set the Colorspace as per the HDMI spec */
540 drm_hdmi_avi_infoframe_colorspace(&frame.avi, conn_state);
542 /* nonsense combination */
543 drm_WARN_ON(encoder->base.dev, crtc_state->limited_color_range &&
544 crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB);
546 if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_RGB) {
547 drm_hdmi_avi_infoframe_quant_range(&frame.avi,
548 conn_state->connector,
550 crtc_state->limited_color_range ?
551 HDMI_QUANTIZATION_RANGE_LIMITED :
552 HDMI_QUANTIZATION_RANGE_FULL);
554 frame.avi.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
555 frame.avi.ycc_quantization_range = HDMI_YCC_QUANTIZATION_RANGE_LIMITED;
558 drm_hdmi_avi_infoframe_content_type(&frame.avi, conn_state);
560 ret = hdmi_infoframe_pack(&frame, buf, sizeof(buf));
562 DRM_ERROR("Failed to pack AVI IF\n");
566 dig_port->write_infoframe(encoder, crtc_state, HDMI_INFOFRAME_TYPE_AVI,
570 static bool _lspcon_read_avi_infoframe_enabled_mca(struct drm_dp_aux *aux)
574 u16 reg = LSPCON_MCA_AVI_IF_CTRL;
576 ret = drm_dp_dpcd_read(aux, reg, &val, 1);
578 DRM_ERROR("DPCD read failed, address 0x%x\n", reg);
582 return val & LSPCON_MCA_AVI_IF_KICKOFF;
585 static bool _lspcon_read_avi_infoframe_enabled_parade(struct drm_dp_aux *aux)
589 u16 reg = LSPCON_PARADE_AVI_IF_CTRL;
591 ret = drm_dp_dpcd_read(aux, reg, &val, 1);
593 DRM_ERROR("DPCD read failed, address 0x%x\n", reg);
597 return val & LSPCON_PARADE_AVI_IF_KICKOFF;
600 u32 lspcon_infoframes_enabled(struct intel_encoder *encoder,
601 const struct intel_crtc_state *pipe_config)
603 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
604 struct intel_lspcon *lspcon = enc_to_intel_lspcon(encoder);
605 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
606 bool infoframes_enabled;
610 if (lspcon->vendor == LSPCON_VENDOR_MCA)
611 infoframes_enabled = _lspcon_read_avi_infoframe_enabled_mca(&intel_dp->aux);
613 infoframes_enabled = _lspcon_read_avi_infoframe_enabled_parade(&intel_dp->aux);
615 if (infoframes_enabled)
616 val |= intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_AVI);
618 if (lspcon->hdr_supported) {
619 tmp = intel_de_read(dev_priv,
620 HSW_TVIDEO_DIP_CTL(pipe_config->cpu_transcoder));
621 mask = VIDEO_DIP_ENABLE_GMP_HSW;
624 val |= intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GAMUT_METADATA);
630 void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon)
632 lspcon_wait_mode(lspcon, DRM_LSPCON_MODE_PCON);
635 bool lspcon_init(struct intel_digital_port *dig_port)
637 struct intel_dp *dp = &dig_port->dp;
638 struct intel_lspcon *lspcon = &dig_port->lspcon;
639 struct drm_connector *connector = &dp->attached_connector->base;
641 lspcon->active = false;
642 lspcon->mode = DRM_LSPCON_MODE_INVALID;
644 if (!lspcon_probe(lspcon)) {
645 DRM_ERROR("Failed to probe lspcon\n");
649 if (drm_dp_read_dpcd_caps(&dp->aux, dp->dpcd) != 0) {
650 DRM_ERROR("LSPCON DPCD read failed\n");
654 if (!lspcon_detect_vendor(lspcon)) {
655 DRM_ERROR("LSPCON vendor detection failed\n");
659 connector->ycbcr_420_allowed = true;
660 lspcon->active = true;
661 DRM_DEBUG_KMS("Success: LSPCON init\n");
665 u32 intel_lspcon_infoframes_enabled(struct intel_encoder *encoder,
666 const struct intel_crtc_state *pipe_config)
668 struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
670 return dig_port->infoframes_enabled(encoder, pipe_config);
673 void lspcon_resume(struct intel_digital_port *dig_port)
675 struct intel_lspcon *lspcon = &dig_port->lspcon;
676 struct drm_device *dev = dig_port->base.base.dev;
677 struct drm_i915_private *dev_priv = to_i915(dev);
678 enum drm_lspcon_mode expected_mode;
680 if (!intel_bios_is_lspcon_present(dev_priv, dig_port->base.port))
683 if (!lspcon->active) {
684 if (!lspcon_init(dig_port)) {
685 DRM_ERROR("LSPCON init failed on port %c\n",
686 port_name(dig_port->base.port));
691 if (lspcon_wake_native_aux_ch(lspcon)) {
692 expected_mode = DRM_LSPCON_MODE_PCON;
693 lspcon_resume_in_pcon_wa(lspcon);
695 expected_mode = DRM_LSPCON_MODE_LS;
698 if (lspcon_wait_mode(lspcon, expected_mode) == DRM_LSPCON_MODE_PCON)
701 if (lspcon_change_mode(lspcon, DRM_LSPCON_MODE_PCON))
702 DRM_ERROR("LSPCON resume failed\n");
704 DRM_DEBUG_KMS("LSPCON resume success\n");