2 * Copyright © 2014-2016 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.
24 #include "intel_drv.h"
29 * VLV, CHV and BXT have slightly peculiar display PHYs for driving DP/HDMI
30 * ports. DPIO is the name given to such a display PHY. These PHYs
31 * don't follow the standard programming model using direct MMIO
32 * registers, and instead their registers must be accessed trough IOSF
33 * sideband. VLV has one such PHY for driving ports B and C, and CHV
34 * adds another PHY for driving port D. Each PHY responds to specific
37 * Each display PHY is made up of one or two channels. Each channel
38 * houses a common lane part which contains the PLL and other common
39 * logic. CH0 common lane also contains the IOSF-SB logic for the
40 * Common Register Interface (CRI) ie. the DPIO registers. CRI clock
41 * must be running when any DPIO registers are accessed.
43 * In addition to having their own registers, the PHYs are also
44 * controlled through some dedicated signals from the display
45 * controller. These include PLL reference clock enable, PLL enable,
46 * and CRI clock selection, for example.
48 * Eeach channel also has two splines (also called data lanes), and
49 * each spline is made up of one Physical Access Coding Sub-Layer
50 * (PCS) block and two TX lanes. So each channel has two PCS blocks
51 * and four TX lanes. The TX lanes are used as DP lanes or TMDS
52 * data/clock pairs depending on the output type.
54 * Additionally the PHY also contains an AUX lane with AUX blocks
55 * for each channel. This is used for DP AUX communication, but
56 * this fact isn't really relevant for the driver since AUX is
57 * controlled from the display controller side. No DPIO registers
58 * need to be accessed during AUX communication,
60 * Generally on VLV/CHV the common lane corresponds to the pipe and
61 * the spline (PCS/TX) corresponds to the port.
63 * For dual channel PHY (VLV/CHV):
65 * pipe A == CMN/PLL/REF CH0
67 * pipe B == CMN/PLL/REF CH1
69 * port B == PCS/TX CH0
71 * port C == PCS/TX CH1
73 * This is especially important when we cross the streams
74 * ie. drive port B with pipe B, or port C with pipe A.
76 * For single channel PHY (CHV):
78 * pipe C == CMN/PLL/REF CH0
80 * port D == PCS/TX CH0
82 * On BXT the entire PHY channel corresponds to the port. That means
83 * the PLL is also now associated with the port rather than the pipe,
84 * and so the clock needs to be routed to the appropriate transcoder.
85 * Port A PLL is directly connected to transcoder EDP and port B/C
86 * PLLs can be routed to any transcoder A/B/C.
88 * Note: DDI0 is digital port B, DD1 is digital port C, and DDI2 is
89 * digital port D (CHV) or port A (BXT). ::
92 * Dual channel PHY (VLV/CHV/BXT)
93 * ---------------------------------
95 * | CMN/PLL/REF | CMN/PLL/REF |
96 * |---------------|---------------| Display PHY
97 * | PCS01 | PCS23 | PCS01 | PCS23 |
98 * |-------|-------|-------|-------|
99 * |TX0|TX1|TX2|TX3|TX0|TX1|TX2|TX3|
100 * ---------------------------------
101 * | DDI0 | DDI1 | DP/HDMI ports
102 * ---------------------------------
104 * Single channel PHY (CHV/BXT)
108 * |---------------| Display PHY
113 * | DDI2 | DP/HDMI port
118 * struct bxt_ddi_phy_info - Hold info for a broxton DDI phy
120 struct bxt_ddi_phy_info {
122 * @dual_channel: true if this phy has a second channel.
127 * @rcomp_phy: If -1, indicates this phy has its own rcomp resistor.
128 * Otherwise the GRC value will be copied from the phy indicated by
131 enum dpio_phy rcomp_phy;
134 * @reset_delay: delay in us to wait before setting the common reset
135 * bit in BXT_PHY_CTL_FAMILY, which effectively enables the phy.
140 * @pwron_mask: Mask with the appropriate bit set that would cause the
141 * punit to power this phy if written to BXT_P_CR_GT_DISP_PWRON.
146 * @channel: struct containing per channel information.
150 * @channel.port: which port maps to this channel.
156 static const struct bxt_ddi_phy_info bxt_ddi_phy_info[] = {
158 .dual_channel = true,
159 .rcomp_phy = DPIO_PHY1,
160 .pwron_mask = BIT(0),
163 [DPIO_CH0] = { .port = PORT_B },
164 [DPIO_CH1] = { .port = PORT_C },
168 .dual_channel = false,
170 .pwron_mask = BIT(1),
173 [DPIO_CH0] = { .port = PORT_A },
178 static const struct bxt_ddi_phy_info glk_ddi_phy_info[] = {
180 .dual_channel = false,
181 .rcomp_phy = DPIO_PHY1,
182 .pwron_mask = BIT(0),
186 [DPIO_CH0] = { .port = PORT_B },
190 .dual_channel = false,
192 .pwron_mask = BIT(3),
196 [DPIO_CH0] = { .port = PORT_A },
200 .dual_channel = false,
201 .rcomp_phy = DPIO_PHY1,
202 .pwron_mask = BIT(1),
206 [DPIO_CH0] = { .port = PORT_C },
211 static const struct bxt_ddi_phy_info *
212 bxt_get_phy_list(struct drm_i915_private *dev_priv, int *count)
214 if (IS_GEMINILAKE(dev_priv)) {
215 *count = ARRAY_SIZE(glk_ddi_phy_info);
216 return glk_ddi_phy_info;
218 *count = ARRAY_SIZE(bxt_ddi_phy_info);
219 return bxt_ddi_phy_info;
223 static const struct bxt_ddi_phy_info *
224 bxt_get_phy_info(struct drm_i915_private *dev_priv, enum dpio_phy phy)
227 const struct bxt_ddi_phy_info *phy_list =
228 bxt_get_phy_list(dev_priv, &count);
230 return &phy_list[phy];
233 void bxt_port_to_phy_channel(struct drm_i915_private *dev_priv, enum port port,
234 enum dpio_phy *phy, enum dpio_channel *ch)
236 const struct bxt_ddi_phy_info *phy_info, *phys;
239 phys = bxt_get_phy_list(dev_priv, &count);
241 for (i = 0; i < count; i++) {
244 if (port == phy_info->channel[DPIO_CH0].port) {
250 if (phy_info->dual_channel &&
251 port == phy_info->channel[DPIO_CH1].port) {
258 WARN(1, "PHY not found for PORT %c", port_name(port));
263 void bxt_ddi_phy_set_signal_level(struct drm_i915_private *dev_priv,
264 enum port port, u32 margin, u32 scale,
265 u32 enable, u32 deemphasis)
269 enum dpio_channel ch;
271 bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
274 * While we write to the group register to program all lanes at once we
275 * can read only lane registers and we pick lanes 0/1 for that.
277 val = I915_READ(BXT_PORT_PCS_DW10_LN01(phy, ch));
278 val &= ~(TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT);
279 I915_WRITE(BXT_PORT_PCS_DW10_GRP(phy, ch), val);
281 val = I915_READ(BXT_PORT_TX_DW2_LN0(phy, ch));
282 val &= ~(MARGIN_000 | UNIQ_TRANS_SCALE);
283 val |= margin << MARGIN_000_SHIFT | scale << UNIQ_TRANS_SCALE_SHIFT;
284 I915_WRITE(BXT_PORT_TX_DW2_GRP(phy, ch), val);
286 val = I915_READ(BXT_PORT_TX_DW3_LN0(phy, ch));
287 val &= ~SCALE_DCOMP_METHOD;
289 val |= SCALE_DCOMP_METHOD;
291 if ((val & UNIQUE_TRANGE_EN_METHOD) && !(val & SCALE_DCOMP_METHOD))
292 DRM_ERROR("Disabled scaling while ouniqetrangenmethod was set");
294 I915_WRITE(BXT_PORT_TX_DW3_GRP(phy, ch), val);
296 val = I915_READ(BXT_PORT_TX_DW4_LN0(phy, ch));
298 val |= deemphasis << DEEMPH_SHIFT;
299 I915_WRITE(BXT_PORT_TX_DW4_GRP(phy, ch), val);
301 val = I915_READ(BXT_PORT_PCS_DW10_LN01(phy, ch));
302 val |= TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT;
303 I915_WRITE(BXT_PORT_PCS_DW10_GRP(phy, ch), val);
306 bool bxt_ddi_phy_is_enabled(struct drm_i915_private *dev_priv,
309 const struct bxt_ddi_phy_info *phy_info;
311 phy_info = bxt_get_phy_info(dev_priv, phy);
313 if (!(I915_READ(BXT_P_CR_GT_DISP_PWRON) & phy_info->pwron_mask))
316 if ((I915_READ(BXT_PORT_CL1CM_DW0(phy)) &
317 (PHY_POWER_GOOD | PHY_RESERVED)) != PHY_POWER_GOOD) {
318 DRM_DEBUG_DRIVER("DDI PHY %d powered, but power hasn't settled\n",
324 if (!(I915_READ(BXT_PHY_CTL_FAMILY(phy)) & COMMON_RESET_DIS)) {
325 DRM_DEBUG_DRIVER("DDI PHY %d powered, but still in reset\n",
334 static u32 bxt_get_grc(struct drm_i915_private *dev_priv, enum dpio_phy phy)
336 u32 val = I915_READ(BXT_PORT_REF_DW6(phy));
338 return (val & GRC_CODE_MASK) >> GRC_CODE_SHIFT;
341 static void bxt_phy_wait_grc_done(struct drm_i915_private *dev_priv,
344 if (intel_wait_for_register(dev_priv,
345 BXT_PORT_REF_DW3(phy),
348 DRM_ERROR("timeout waiting for PHY%d GRC\n", phy);
351 static void _bxt_ddi_phy_init(struct drm_i915_private *dev_priv,
354 const struct bxt_ddi_phy_info *phy_info;
357 phy_info = bxt_get_phy_info(dev_priv, phy);
359 if (bxt_ddi_phy_is_enabled(dev_priv, phy)) {
360 /* Still read out the GRC value for state verification */
361 if (phy_info->rcomp_phy != -1)
362 dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv, phy);
364 if (bxt_ddi_phy_verify_state(dev_priv, phy)) {
365 DRM_DEBUG_DRIVER("DDI PHY %d already enabled, "
366 "won't reprogram it\n", phy);
370 DRM_DEBUG_DRIVER("DDI PHY %d enabled with invalid state, "
371 "force reprogramming it\n", phy);
374 val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
375 val |= phy_info->pwron_mask;
376 I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val);
379 * The PHY registers start out inaccessible and respond to reads with
380 * all 1s. Eventually they become accessible as they power up, then
381 * the reserved bit will give the default 0. Poll on the reserved bit
382 * becoming 0 to find when the PHY is accessible.
383 * The flag should get set in 100us according to the HW team, but
384 * use 1ms due to occasional timeouts observed with that.
386 if (intel_wait_for_register_fw(&dev_priv->uncore,
387 BXT_PORT_CL1CM_DW0(phy),
388 PHY_RESERVED | PHY_POWER_GOOD,
391 DRM_ERROR("timeout during PHY%d power on\n", phy);
393 /* Program PLL Rcomp code offset */
394 val = I915_READ(BXT_PORT_CL1CM_DW9(phy));
395 val &= ~IREF0RC_OFFSET_MASK;
396 val |= 0xE4 << IREF0RC_OFFSET_SHIFT;
397 I915_WRITE(BXT_PORT_CL1CM_DW9(phy), val);
399 val = I915_READ(BXT_PORT_CL1CM_DW10(phy));
400 val &= ~IREF1RC_OFFSET_MASK;
401 val |= 0xE4 << IREF1RC_OFFSET_SHIFT;
402 I915_WRITE(BXT_PORT_CL1CM_DW10(phy), val);
404 /* Program power gating */
405 val = I915_READ(BXT_PORT_CL1CM_DW28(phy));
406 val |= OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN |
408 I915_WRITE(BXT_PORT_CL1CM_DW28(phy), val);
410 if (phy_info->dual_channel) {
411 val = I915_READ(BXT_PORT_CL2CM_DW6(phy));
412 val |= DW6_OLDO_DYN_PWR_DOWN_EN;
413 I915_WRITE(BXT_PORT_CL2CM_DW6(phy), val);
416 if (phy_info->rcomp_phy != -1) {
419 bxt_phy_wait_grc_done(dev_priv, phy_info->rcomp_phy);
422 * PHY0 isn't connected to an RCOMP resistor so copy over
423 * the corresponding calibrated value from PHY1, and disable
424 * the automatic calibration on PHY0.
426 val = dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv,
427 phy_info->rcomp_phy);
428 grc_code = val << GRC_CODE_FAST_SHIFT |
429 val << GRC_CODE_SLOW_SHIFT |
431 I915_WRITE(BXT_PORT_REF_DW6(phy), grc_code);
433 val = I915_READ(BXT_PORT_REF_DW8(phy));
434 val |= GRC_DIS | GRC_RDY_OVRD;
435 I915_WRITE(BXT_PORT_REF_DW8(phy), val);
438 if (phy_info->reset_delay)
439 udelay(phy_info->reset_delay);
441 val = I915_READ(BXT_PHY_CTL_FAMILY(phy));
442 val |= COMMON_RESET_DIS;
443 I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val);
446 void bxt_ddi_phy_uninit(struct drm_i915_private *dev_priv, enum dpio_phy phy)
448 const struct bxt_ddi_phy_info *phy_info;
451 phy_info = bxt_get_phy_info(dev_priv, phy);
453 val = I915_READ(BXT_PHY_CTL_FAMILY(phy));
454 val &= ~COMMON_RESET_DIS;
455 I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val);
457 val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
458 val &= ~phy_info->pwron_mask;
459 I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val);
462 void bxt_ddi_phy_init(struct drm_i915_private *dev_priv, enum dpio_phy phy)
464 const struct bxt_ddi_phy_info *phy_info =
465 bxt_get_phy_info(dev_priv, phy);
466 enum dpio_phy rcomp_phy = phy_info->rcomp_phy;
469 lockdep_assert_held(&dev_priv->power_domains.lock);
473 was_enabled = bxt_ddi_phy_is_enabled(dev_priv, rcomp_phy);
476 * We need to copy the GRC calibration value from rcomp_phy,
477 * so make sure it's powered up.
480 _bxt_ddi_phy_init(dev_priv, rcomp_phy);
482 _bxt_ddi_phy_init(dev_priv, phy);
485 bxt_ddi_phy_uninit(dev_priv, rcomp_phy);
488 static bool __printf(6, 7)
489 __phy_reg_verify_state(struct drm_i915_private *dev_priv, enum dpio_phy phy,
490 i915_reg_t reg, u32 mask, u32 expected,
491 const char *reg_fmt, ...)
493 struct va_format vaf;
497 val = I915_READ(reg);
498 if ((val & mask) == expected)
501 va_start(args, reg_fmt);
505 DRM_DEBUG_DRIVER("DDI PHY %d reg %pV [%08x] state mismatch: "
506 "current %08x, expected %08x (mask %08x)\n",
507 phy, &vaf, reg.reg, val, (val & ~mask) | expected,
515 bool bxt_ddi_phy_verify_state(struct drm_i915_private *dev_priv,
518 const struct bxt_ddi_phy_info *phy_info;
522 phy_info = bxt_get_phy_info(dev_priv, phy);
524 #define _CHK(reg, mask, exp, fmt, ...) \
525 __phy_reg_verify_state(dev_priv, phy, reg, mask, exp, fmt, \
528 if (!bxt_ddi_phy_is_enabled(dev_priv, phy))
533 /* PLL Rcomp code offset */
534 ok &= _CHK(BXT_PORT_CL1CM_DW9(phy),
535 IREF0RC_OFFSET_MASK, 0xe4 << IREF0RC_OFFSET_SHIFT,
536 "BXT_PORT_CL1CM_DW9(%d)", phy);
537 ok &= _CHK(BXT_PORT_CL1CM_DW10(phy),
538 IREF1RC_OFFSET_MASK, 0xe4 << IREF1RC_OFFSET_SHIFT,
539 "BXT_PORT_CL1CM_DW10(%d)", phy);
542 mask = OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN | SUS_CLK_CONFIG;
543 ok &= _CHK(BXT_PORT_CL1CM_DW28(phy), mask, mask,
544 "BXT_PORT_CL1CM_DW28(%d)", phy);
546 if (phy_info->dual_channel)
547 ok &= _CHK(BXT_PORT_CL2CM_DW6(phy),
548 DW6_OLDO_DYN_PWR_DOWN_EN, DW6_OLDO_DYN_PWR_DOWN_EN,
549 "BXT_PORT_CL2CM_DW6(%d)", phy);
551 if (phy_info->rcomp_phy != -1) {
552 u32 grc_code = dev_priv->bxt_phy_grc;
554 grc_code = grc_code << GRC_CODE_FAST_SHIFT |
555 grc_code << GRC_CODE_SLOW_SHIFT |
557 mask = GRC_CODE_FAST_MASK | GRC_CODE_SLOW_MASK |
559 ok &= _CHK(BXT_PORT_REF_DW6(phy), mask, grc_code,
560 "BXT_PORT_REF_DW6(%d)", phy);
562 mask = GRC_DIS | GRC_RDY_OVRD;
563 ok &= _CHK(BXT_PORT_REF_DW8(phy), mask, mask,
564 "BXT_PORT_REF_DW8(%d)", phy);
572 bxt_ddi_phy_calc_lane_lat_optim_mask(u8 lane_count)
574 switch (lane_count) {
578 return BIT(2) | BIT(0);
580 return BIT(3) | BIT(2) | BIT(0);
582 MISSING_CASE(lane_count);
588 void bxt_ddi_phy_set_lane_optim_mask(struct intel_encoder *encoder,
589 u8 lane_lat_optim_mask)
591 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
592 enum port port = encoder->port;
594 enum dpio_channel ch;
597 bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
599 for (lane = 0; lane < 4; lane++) {
600 u32 val = I915_READ(BXT_PORT_TX_DW14_LN(phy, ch, lane));
603 * Note that on CHV this flag is called UPAR, but has
606 val &= ~LATENCY_OPTIM;
607 if (lane_lat_optim_mask & BIT(lane))
608 val |= LATENCY_OPTIM;
610 I915_WRITE(BXT_PORT_TX_DW14_LN(phy, ch, lane), val);
615 bxt_ddi_phy_get_lane_lat_optim_mask(struct intel_encoder *encoder)
617 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
618 enum port port = encoder->port;
620 enum dpio_channel ch;
624 bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
627 for (lane = 0; lane < 4; lane++) {
628 u32 val = I915_READ(BXT_PORT_TX_DW14_LN(phy, ch, lane));
630 if (val & LATENCY_OPTIM)
638 void chv_set_phy_signal_level(struct intel_encoder *encoder,
639 u32 deemph_reg_value, u32 margin_reg_value,
640 bool uniq_trans_scale)
642 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
643 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
644 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
645 enum dpio_channel ch = vlv_dport_to_channel(dport);
646 enum pipe pipe = intel_crtc->pipe;
650 mutex_lock(&dev_priv->sb_lock);
652 /* Clear calc init */
653 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
654 val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
655 val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
656 val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
657 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
659 if (intel_crtc->config->lane_count > 2) {
660 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
661 val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
662 val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
663 val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
664 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
667 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch));
668 val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
669 val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
670 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val);
672 if (intel_crtc->config->lane_count > 2) {
673 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch));
674 val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
675 val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
676 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val);
679 /* Program swing deemph */
680 for (i = 0; i < intel_crtc->config->lane_count; i++) {
681 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i));
682 val &= ~DPIO_SWING_DEEMPH9P5_MASK;
683 val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT;
684 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val);
687 /* Program swing margin */
688 for (i = 0; i < intel_crtc->config->lane_count; i++) {
689 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i));
691 val &= ~DPIO_SWING_MARGIN000_MASK;
692 val |= margin_reg_value << DPIO_SWING_MARGIN000_SHIFT;
695 * Supposedly this value shouldn't matter when unique transition
696 * scale is disabled, but in fact it does matter. Let's just
697 * always program the same value and hope it's OK.
699 val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT);
700 val |= 0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT;
702 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val);
706 * The document said it needs to set bit 27 for ch0 and bit 26
707 * for ch1. Might be a typo in the doc.
708 * For now, for this unique transition scale selection, set bit
709 * 27 for ch0 and ch1.
711 for (i = 0; i < intel_crtc->config->lane_count; i++) {
712 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i));
713 if (uniq_trans_scale)
714 val |= DPIO_TX_UNIQ_TRANS_SCALE_EN;
716 val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;
717 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val);
720 /* Start swing calculation */
721 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
722 val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
723 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
725 if (intel_crtc->config->lane_count > 2) {
726 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
727 val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
728 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
731 mutex_unlock(&dev_priv->sb_lock);
735 void chv_data_lane_soft_reset(struct intel_encoder *encoder,
736 const struct intel_crtc_state *crtc_state,
739 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
740 enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base));
741 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
742 enum pipe pipe = crtc->pipe;
745 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
747 val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
749 val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET;
750 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
752 if (crtc_state->lane_count > 2) {
753 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
755 val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
757 val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET;
758 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
761 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
762 val |= CHV_PCS_REQ_SOFTRESET_EN;
764 val &= ~DPIO_PCS_CLK_SOFT_RESET;
766 val |= DPIO_PCS_CLK_SOFT_RESET;
767 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
769 if (crtc_state->lane_count > 2) {
770 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
771 val |= CHV_PCS_REQ_SOFTRESET_EN;
773 val &= ~DPIO_PCS_CLK_SOFT_RESET;
775 val |= DPIO_PCS_CLK_SOFT_RESET;
776 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
780 void chv_phy_pre_pll_enable(struct intel_encoder *encoder,
781 const struct intel_crtc_state *crtc_state)
783 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
784 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
785 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
786 enum dpio_channel ch = vlv_dport_to_channel(dport);
787 enum pipe pipe = crtc->pipe;
788 unsigned int lane_mask =
789 intel_dp_unused_lane_mask(crtc_state->lane_count);
793 * Must trick the second common lane into life.
794 * Otherwise we can't even access the PLL.
796 if (ch == DPIO_CH0 && pipe == PIPE_B)
797 dport->release_cl2_override =
798 !chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, true);
800 chv_phy_powergate_lanes(encoder, true, lane_mask);
802 mutex_lock(&dev_priv->sb_lock);
804 /* Assert data lane reset */
805 chv_data_lane_soft_reset(encoder, crtc_state, true);
807 /* program left/right clock distribution */
808 if (pipe != PIPE_B) {
809 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
810 val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
812 val |= CHV_BUFLEFTENA1_FORCE;
814 val |= CHV_BUFRIGHTENA1_FORCE;
815 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
817 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
818 val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
820 val |= CHV_BUFLEFTENA2_FORCE;
822 val |= CHV_BUFRIGHTENA2_FORCE;
823 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
826 /* program clock channel usage */
827 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch));
828 val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
830 val &= ~CHV_PCS_USEDCLKCHANNEL;
832 val |= CHV_PCS_USEDCLKCHANNEL;
833 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW8(ch), val);
835 if (crtc_state->lane_count > 2) {
836 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW8(ch));
837 val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
839 val &= ~CHV_PCS_USEDCLKCHANNEL;
841 val |= CHV_PCS_USEDCLKCHANNEL;
842 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW8(ch), val);
846 * This a a bit weird since generally CL
847 * matches the pipe, but here we need to
848 * pick the CL based on the port.
850 val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW19(ch));
852 val &= ~CHV_CMN_USEDCLKCHANNEL;
854 val |= CHV_CMN_USEDCLKCHANNEL;
855 vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val);
857 mutex_unlock(&dev_priv->sb_lock);
860 void chv_phy_pre_encoder_enable(struct intel_encoder *encoder,
861 const struct intel_crtc_state *crtc_state)
863 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
864 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
865 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
866 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
867 enum dpio_channel ch = vlv_dport_to_channel(dport);
868 enum pipe pipe = crtc->pipe;
869 int data, i, stagger;
872 mutex_lock(&dev_priv->sb_lock);
874 /* allow hardware to manage TX FIFO reset source */
875 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
876 val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
877 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
879 if (crtc_state->lane_count > 2) {
880 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
881 val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
882 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
885 /* Program Tx lane latency optimal setting*/
886 for (i = 0; i < crtc_state->lane_count; i++) {
887 /* Set the upar bit */
888 if (crtc_state->lane_count == 1)
891 data = (i == 1) ? 0x0 : 0x1;
892 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
893 data << DPIO_UPAR_SHIFT);
896 /* Data lane stagger programming */
897 if (crtc_state->port_clock > 270000)
899 else if (crtc_state->port_clock > 135000)
901 else if (crtc_state->port_clock > 67500)
903 else if (crtc_state->port_clock > 33750)
908 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
909 val |= DPIO_TX2_STAGGER_MASK(0x1f);
910 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
912 if (crtc_state->lane_count > 2) {
913 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
914 val |= DPIO_TX2_STAGGER_MASK(0x1f);
915 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
918 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch),
919 DPIO_LANESTAGGER_STRAP(stagger) |
920 DPIO_LANESTAGGER_STRAP_OVRD |
921 DPIO_TX1_STAGGER_MASK(0x1f) |
922 DPIO_TX1_STAGGER_MULT(6) |
923 DPIO_TX2_STAGGER_MULT(0));
925 if (crtc_state->lane_count > 2) {
926 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch),
927 DPIO_LANESTAGGER_STRAP(stagger) |
928 DPIO_LANESTAGGER_STRAP_OVRD |
929 DPIO_TX1_STAGGER_MASK(0x1f) |
930 DPIO_TX1_STAGGER_MULT(7) |
931 DPIO_TX2_STAGGER_MULT(5));
934 /* Deassert data lane reset */
935 chv_data_lane_soft_reset(encoder, crtc_state, false);
937 mutex_unlock(&dev_priv->sb_lock);
940 void chv_phy_release_cl2_override(struct intel_encoder *encoder)
942 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
943 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
945 if (dport->release_cl2_override) {
946 chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false);
947 dport->release_cl2_override = false;
951 void chv_phy_post_pll_disable(struct intel_encoder *encoder,
952 const struct intel_crtc_state *old_crtc_state)
954 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
955 enum pipe pipe = to_intel_crtc(old_crtc_state->base.crtc)->pipe;
958 mutex_lock(&dev_priv->sb_lock);
960 /* disable left/right clock distribution */
961 if (pipe != PIPE_B) {
962 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
963 val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
964 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
966 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
967 val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
968 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
971 mutex_unlock(&dev_priv->sb_lock);
974 * Leave the power down bit cleared for at least one
975 * lane so that chv_powergate_phy_ch() will power
976 * on something when the channel is otherwise unused.
977 * When the port is off and the override is removed
978 * the lanes power down anyway, so otherwise it doesn't
979 * really matter what the state of power down bits is
982 chv_phy_powergate_lanes(encoder, false, 0x0);
985 void vlv_set_phy_signal_level(struct intel_encoder *encoder,
986 u32 demph_reg_value, u32 preemph_reg_value,
987 u32 uniqtranscale_reg_value, u32 tx3_demph)
989 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
990 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
991 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
992 enum dpio_channel port = vlv_dport_to_channel(dport);
993 enum pipe pipe = intel_crtc->pipe;
995 mutex_lock(&dev_priv->sb_lock);
996 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0x00000000);
997 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(port), demph_reg_value);
998 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(port),
999 uniqtranscale_reg_value);
1000 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(port), 0x0C782040);
1003 vlv_dpio_write(dev_priv, pipe, VLV_TX3_DW4(port), tx3_demph);
1005 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW11(port), 0x00030000);
1006 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW9(port), preemph_reg_value);
1007 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), DPIO_TX_OCALINIT_EN);
1008 mutex_unlock(&dev_priv->sb_lock);
1011 void vlv_phy_pre_pll_enable(struct intel_encoder *encoder,
1012 const struct intel_crtc_state *crtc_state)
1014 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
1015 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1016 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
1017 enum dpio_channel port = vlv_dport_to_channel(dport);
1018 enum pipe pipe = crtc->pipe;
1020 /* Program Tx lane resets to default */
1021 mutex_lock(&dev_priv->sb_lock);
1022 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port),
1023 DPIO_PCS_TX_LANE2_RESET |
1024 DPIO_PCS_TX_LANE1_RESET);
1025 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port),
1026 DPIO_PCS_CLK_CRI_RXEB_EIOS_EN |
1027 DPIO_PCS_CLK_CRI_RXDIGFILTSG_EN |
1028 (1<<DPIO_PCS_CLK_DATAWIDTH_SHIFT) |
1029 DPIO_PCS_CLK_SOFT_RESET);
1031 /* Fix up inter-pair skew failure */
1032 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW12(port), 0x00750f00);
1033 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW11(port), 0x00001500);
1034 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW14(port), 0x40400000);
1035 mutex_unlock(&dev_priv->sb_lock);
1038 void vlv_phy_pre_encoder_enable(struct intel_encoder *encoder,
1039 const struct intel_crtc_state *crtc_state)
1041 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
1042 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
1043 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1044 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
1045 enum dpio_channel port = vlv_dport_to_channel(dport);
1046 enum pipe pipe = crtc->pipe;
1049 mutex_lock(&dev_priv->sb_lock);
1051 /* Enable clock channels for this port */
1052 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(port));
1059 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW8(port), val);
1061 /* Program lane clock */
1062 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW14(port), 0x00760018);
1063 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW23(port), 0x00400888);
1065 mutex_unlock(&dev_priv->sb_lock);
1068 void vlv_phy_reset_lanes(struct intel_encoder *encoder,
1069 const struct intel_crtc_state *old_crtc_state)
1071 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
1072 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1073 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
1074 enum dpio_channel port = vlv_dport_to_channel(dport);
1075 enum pipe pipe = crtc->pipe;
1077 mutex_lock(&dev_priv->sb_lock);
1078 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port), 0x00000000);
1079 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port), 0x00e00060);
1080 mutex_unlock(&dev_priv->sb_lock);