2 * Copyright © 2014-2016 Intel Corporation
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21 * DEALINGS IN THE SOFTWARE.
25 #include "intel_drv.h"
30 * VLV, CHV and BXT have slightly peculiar display PHYs for driving DP/HDMI
31 * ports. DPIO is the name given to such a display PHY. These PHYs
32 * don't follow the standard programming model using direct MMIO
33 * registers, and instead their registers must be accessed trough IOSF
34 * sideband. VLV has one such PHY for driving ports B and C, and CHV
35 * adds another PHY for driving port D. Each PHY responds to specific
38 * Each display PHY is made up of one or two channels. Each channel
39 * houses a common lane part which contains the PLL and other common
40 * logic. CH0 common lane also contains the IOSF-SB logic for the
41 * Common Register Interface (CRI) ie. the DPIO registers. CRI clock
42 * must be running when any DPIO registers are accessed.
44 * In addition to having their own registers, the PHYs are also
45 * controlled through some dedicated signals from the display
46 * controller. These include PLL reference clock enable, PLL enable,
47 * and CRI clock selection, for example.
49 * Eeach channel also has two splines (also called data lanes), and
50 * each spline is made up of one Physical Access Coding Sub-Layer
51 * (PCS) block and two TX lanes. So each channel has two PCS blocks
52 * and four TX lanes. The TX lanes are used as DP lanes or TMDS
53 * data/clock pairs depending on the output type.
55 * Additionally the PHY also contains an AUX lane with AUX blocks
56 * for each channel. This is used for DP AUX communication, but
57 * this fact isn't really relevant for the driver since AUX is
58 * controlled from the display controller side. No DPIO registers
59 * need to be accessed during AUX communication,
61 * Generally on VLV/CHV the common lane corresponds to the pipe and
62 * the spline (PCS/TX) corresponds to the port.
64 * For dual channel PHY (VLV/CHV):
66 * pipe A == CMN/PLL/REF CH0
68 * pipe B == CMN/PLL/REF CH1
70 * port B == PCS/TX CH0
72 * port C == PCS/TX CH1
74 * This is especially important when we cross the streams
75 * ie. drive port B with pipe B, or port C with pipe A.
77 * For single channel PHY (CHV):
79 * pipe C == CMN/PLL/REF CH0
81 * port D == PCS/TX CH0
83 * On BXT the entire PHY channel corresponds to the port. That means
84 * the PLL is also now associated with the port rather than the pipe,
85 * and so the clock needs to be routed to the appropriate transcoder.
86 * Port A PLL is directly connected to transcoder EDP and port B/C
87 * PLLs can be routed to any transcoder A/B/C.
89 * Note: DDI0 is digital port B, DD1 is digital port C, and DDI2 is
90 * digital port D (CHV) or port A (BXT). ::
93 * Dual channel PHY (VLV/CHV/BXT)
94 * ---------------------------------
96 * | CMN/PLL/REF | CMN/PLL/REF |
97 * |---------------|---------------| Display PHY
98 * | PCS01 | PCS23 | PCS01 | PCS23 |
99 * |-------|-------|-------|-------|
100 * |TX0|TX1|TX2|TX3|TX0|TX1|TX2|TX3|
101 * ---------------------------------
102 * | DDI0 | DDI1 | DP/HDMI ports
103 * ---------------------------------
105 * Single channel PHY (CHV/BXT)
109 * |---------------| Display PHY
114 * | DDI2 | DP/HDMI port
119 * struct bxt_ddi_phy_info - Hold info for a broxton DDI phy
121 struct bxt_ddi_phy_info {
123 * @dual_channel: true if this phy has a second channel.
128 * @rcomp_phy: If -1, indicates this phy has its own rcomp resistor.
129 * Otherwise the GRC value will be copied from the phy indicated by
132 enum dpio_phy rcomp_phy;
135 * @reset_delay: delay in us to wait before setting the common reset
136 * bit in BXT_PHY_CTL_FAMILY, which effectively enables the phy.
141 * @pwron_mask: Mask with the appropriate bit set that would cause the
142 * punit to power this phy if written to BXT_P_CR_GT_DISP_PWRON.
147 * @channel: struct containing per channel information.
151 * @channel.port: which port maps to this channel.
157 static const struct bxt_ddi_phy_info bxt_ddi_phy_info[] = {
159 .dual_channel = true,
160 .rcomp_phy = DPIO_PHY1,
161 .pwron_mask = BIT(0),
164 [DPIO_CH0] = { .port = PORT_B },
165 [DPIO_CH1] = { .port = PORT_C },
169 .dual_channel = false,
171 .pwron_mask = BIT(1),
174 [DPIO_CH0] = { .port = PORT_A },
179 static const struct bxt_ddi_phy_info glk_ddi_phy_info[] = {
181 .dual_channel = false,
182 .rcomp_phy = DPIO_PHY1,
183 .pwron_mask = BIT(0),
187 [DPIO_CH0] = { .port = PORT_B },
191 .dual_channel = false,
193 .pwron_mask = BIT(3),
197 [DPIO_CH0] = { .port = PORT_A },
201 .dual_channel = false,
202 .rcomp_phy = DPIO_PHY1,
203 .pwron_mask = BIT(1),
207 [DPIO_CH0] = { .port = PORT_C },
212 static const struct bxt_ddi_phy_info *
213 bxt_get_phy_list(struct drm_i915_private *dev_priv, int *count)
215 if (IS_GEMINILAKE(dev_priv)) {
216 *count = ARRAY_SIZE(glk_ddi_phy_info);
217 return glk_ddi_phy_info;
219 *count = ARRAY_SIZE(bxt_ddi_phy_info);
220 return bxt_ddi_phy_info;
224 static const struct bxt_ddi_phy_info *
225 bxt_get_phy_info(struct drm_i915_private *dev_priv, enum dpio_phy phy)
228 const struct bxt_ddi_phy_info *phy_list =
229 bxt_get_phy_list(dev_priv, &count);
231 return &phy_list[phy];
234 void bxt_port_to_phy_channel(struct drm_i915_private *dev_priv, enum port port,
235 enum dpio_phy *phy, enum dpio_channel *ch)
237 const struct bxt_ddi_phy_info *phy_info, *phys;
240 phys = bxt_get_phy_list(dev_priv, &count);
242 for (i = 0; i < count; i++) {
245 if (port == phy_info->channel[DPIO_CH0].port) {
251 if (phy_info->dual_channel &&
252 port == phy_info->channel[DPIO_CH1].port) {
259 WARN(1, "PHY not found for PORT %c", port_name(port));
264 void bxt_ddi_phy_set_signal_level(struct drm_i915_private *dev_priv,
265 enum port port, u32 margin, u32 scale,
266 u32 enable, u32 deemphasis)
270 enum dpio_channel ch;
272 bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
275 * While we write to the group register to program all lanes at once we
276 * can read only lane registers and we pick lanes 0/1 for that.
278 val = I915_READ(BXT_PORT_PCS_DW10_LN01(phy, ch));
279 val &= ~(TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT);
280 I915_WRITE(BXT_PORT_PCS_DW10_GRP(phy, ch), val);
282 val = I915_READ(BXT_PORT_TX_DW2_LN0(phy, ch));
283 val &= ~(MARGIN_000 | UNIQ_TRANS_SCALE);
284 val |= margin << MARGIN_000_SHIFT | scale << UNIQ_TRANS_SCALE_SHIFT;
285 I915_WRITE(BXT_PORT_TX_DW2_GRP(phy, ch), val);
287 val = I915_READ(BXT_PORT_TX_DW3_LN0(phy, ch));
288 val &= ~SCALE_DCOMP_METHOD;
290 val |= SCALE_DCOMP_METHOD;
292 if ((val & UNIQUE_TRANGE_EN_METHOD) && !(val & SCALE_DCOMP_METHOD))
293 DRM_ERROR("Disabled scaling while ouniqetrangenmethod was set");
295 I915_WRITE(BXT_PORT_TX_DW3_GRP(phy, ch), val);
297 val = I915_READ(BXT_PORT_TX_DW4_LN0(phy, ch));
299 val |= deemphasis << DEEMPH_SHIFT;
300 I915_WRITE(BXT_PORT_TX_DW4_GRP(phy, ch), val);
302 val = I915_READ(BXT_PORT_PCS_DW10_LN01(phy, ch));
303 val |= TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT;
304 I915_WRITE(BXT_PORT_PCS_DW10_GRP(phy, ch), val);
307 bool bxt_ddi_phy_is_enabled(struct drm_i915_private *dev_priv,
310 const struct bxt_ddi_phy_info *phy_info;
312 phy_info = bxt_get_phy_info(dev_priv, phy);
314 if (!(I915_READ(BXT_P_CR_GT_DISP_PWRON) & phy_info->pwron_mask))
317 if ((I915_READ(BXT_PORT_CL1CM_DW0(phy)) &
318 (PHY_POWER_GOOD | PHY_RESERVED)) != PHY_POWER_GOOD) {
319 DRM_DEBUG_DRIVER("DDI PHY %d powered, but power hasn't settled\n",
325 if (!(I915_READ(BXT_PHY_CTL_FAMILY(phy)) & COMMON_RESET_DIS)) {
326 DRM_DEBUG_DRIVER("DDI PHY %d powered, but still in reset\n",
335 static u32 bxt_get_grc(struct drm_i915_private *dev_priv, enum dpio_phy phy)
337 u32 val = I915_READ(BXT_PORT_REF_DW6(phy));
339 return (val & GRC_CODE_MASK) >> GRC_CODE_SHIFT;
342 static void bxt_phy_wait_grc_done(struct drm_i915_private *dev_priv,
345 if (intel_wait_for_register(&dev_priv->uncore,
346 BXT_PORT_REF_DW3(phy),
349 DRM_ERROR("timeout waiting for PHY%d GRC\n", phy);
352 static void _bxt_ddi_phy_init(struct drm_i915_private *dev_priv,
355 const struct bxt_ddi_phy_info *phy_info;
358 phy_info = bxt_get_phy_info(dev_priv, phy);
360 if (bxt_ddi_phy_is_enabled(dev_priv, phy)) {
361 /* Still read out the GRC value for state verification */
362 if (phy_info->rcomp_phy != -1)
363 dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv, phy);
365 if (bxt_ddi_phy_verify_state(dev_priv, phy)) {
366 DRM_DEBUG_DRIVER("DDI PHY %d already enabled, "
367 "won't reprogram it\n", phy);
371 DRM_DEBUG_DRIVER("DDI PHY %d enabled with invalid state, "
372 "force reprogramming it\n", phy);
375 val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
376 val |= phy_info->pwron_mask;
377 I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val);
380 * The PHY registers start out inaccessible and respond to reads with
381 * all 1s. Eventually they become accessible as they power up, then
382 * the reserved bit will give the default 0. Poll on the reserved bit
383 * becoming 0 to find when the PHY is accessible.
384 * The flag should get set in 100us according to the HW team, but
385 * use 1ms due to occasional timeouts observed with that.
387 if (intel_wait_for_register_fw(&dev_priv->uncore,
388 BXT_PORT_CL1CM_DW0(phy),
389 PHY_RESERVED | PHY_POWER_GOOD,
392 DRM_ERROR("timeout during PHY%d power on\n", phy);
394 /* Program PLL Rcomp code offset */
395 val = I915_READ(BXT_PORT_CL1CM_DW9(phy));
396 val &= ~IREF0RC_OFFSET_MASK;
397 val |= 0xE4 << IREF0RC_OFFSET_SHIFT;
398 I915_WRITE(BXT_PORT_CL1CM_DW9(phy), val);
400 val = I915_READ(BXT_PORT_CL1CM_DW10(phy));
401 val &= ~IREF1RC_OFFSET_MASK;
402 val |= 0xE4 << IREF1RC_OFFSET_SHIFT;
403 I915_WRITE(BXT_PORT_CL1CM_DW10(phy), val);
405 /* Program power gating */
406 val = I915_READ(BXT_PORT_CL1CM_DW28(phy));
407 val |= OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN |
409 I915_WRITE(BXT_PORT_CL1CM_DW28(phy), val);
411 if (phy_info->dual_channel) {
412 val = I915_READ(BXT_PORT_CL2CM_DW6(phy));
413 val |= DW6_OLDO_DYN_PWR_DOWN_EN;
414 I915_WRITE(BXT_PORT_CL2CM_DW6(phy), val);
417 if (phy_info->rcomp_phy != -1) {
420 bxt_phy_wait_grc_done(dev_priv, phy_info->rcomp_phy);
423 * PHY0 isn't connected to an RCOMP resistor so copy over
424 * the corresponding calibrated value from PHY1, and disable
425 * the automatic calibration on PHY0.
427 val = dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv,
428 phy_info->rcomp_phy);
429 grc_code = val << GRC_CODE_FAST_SHIFT |
430 val << GRC_CODE_SLOW_SHIFT |
432 I915_WRITE(BXT_PORT_REF_DW6(phy), grc_code);
434 val = I915_READ(BXT_PORT_REF_DW8(phy));
435 val |= GRC_DIS | GRC_RDY_OVRD;
436 I915_WRITE(BXT_PORT_REF_DW8(phy), val);
439 if (phy_info->reset_delay)
440 udelay(phy_info->reset_delay);
442 val = I915_READ(BXT_PHY_CTL_FAMILY(phy));
443 val |= COMMON_RESET_DIS;
444 I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val);
447 void bxt_ddi_phy_uninit(struct drm_i915_private *dev_priv, enum dpio_phy phy)
449 const struct bxt_ddi_phy_info *phy_info;
452 phy_info = bxt_get_phy_info(dev_priv, phy);
454 val = I915_READ(BXT_PHY_CTL_FAMILY(phy));
455 val &= ~COMMON_RESET_DIS;
456 I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val);
458 val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
459 val &= ~phy_info->pwron_mask;
460 I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val);
463 void bxt_ddi_phy_init(struct drm_i915_private *dev_priv, enum dpio_phy phy)
465 const struct bxt_ddi_phy_info *phy_info =
466 bxt_get_phy_info(dev_priv, phy);
467 enum dpio_phy rcomp_phy = phy_info->rcomp_phy;
470 lockdep_assert_held(&dev_priv->power_domains.lock);
474 was_enabled = bxt_ddi_phy_is_enabled(dev_priv, rcomp_phy);
477 * We need to copy the GRC calibration value from rcomp_phy,
478 * so make sure it's powered up.
481 _bxt_ddi_phy_init(dev_priv, rcomp_phy);
483 _bxt_ddi_phy_init(dev_priv, phy);
486 bxt_ddi_phy_uninit(dev_priv, rcomp_phy);
489 static bool __printf(6, 7)
490 __phy_reg_verify_state(struct drm_i915_private *dev_priv, enum dpio_phy phy,
491 i915_reg_t reg, u32 mask, u32 expected,
492 const char *reg_fmt, ...)
494 struct va_format vaf;
498 val = I915_READ(reg);
499 if ((val & mask) == expected)
502 va_start(args, reg_fmt);
506 DRM_DEBUG_DRIVER("DDI PHY %d reg %pV [%08x] state mismatch: "
507 "current %08x, expected %08x (mask %08x)\n",
508 phy, &vaf, reg.reg, val, (val & ~mask) | expected,
516 bool bxt_ddi_phy_verify_state(struct drm_i915_private *dev_priv,
519 const struct bxt_ddi_phy_info *phy_info;
523 phy_info = bxt_get_phy_info(dev_priv, phy);
525 #define _CHK(reg, mask, exp, fmt, ...) \
526 __phy_reg_verify_state(dev_priv, phy, reg, mask, exp, fmt, \
529 if (!bxt_ddi_phy_is_enabled(dev_priv, phy))
534 /* PLL Rcomp code offset */
535 ok &= _CHK(BXT_PORT_CL1CM_DW9(phy),
536 IREF0RC_OFFSET_MASK, 0xe4 << IREF0RC_OFFSET_SHIFT,
537 "BXT_PORT_CL1CM_DW9(%d)", phy);
538 ok &= _CHK(BXT_PORT_CL1CM_DW10(phy),
539 IREF1RC_OFFSET_MASK, 0xe4 << IREF1RC_OFFSET_SHIFT,
540 "BXT_PORT_CL1CM_DW10(%d)", phy);
543 mask = OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN | SUS_CLK_CONFIG;
544 ok &= _CHK(BXT_PORT_CL1CM_DW28(phy), mask, mask,
545 "BXT_PORT_CL1CM_DW28(%d)", phy);
547 if (phy_info->dual_channel)
548 ok &= _CHK(BXT_PORT_CL2CM_DW6(phy),
549 DW6_OLDO_DYN_PWR_DOWN_EN, DW6_OLDO_DYN_PWR_DOWN_EN,
550 "BXT_PORT_CL2CM_DW6(%d)", phy);
552 if (phy_info->rcomp_phy != -1) {
553 u32 grc_code = dev_priv->bxt_phy_grc;
555 grc_code = grc_code << GRC_CODE_FAST_SHIFT |
556 grc_code << GRC_CODE_SLOW_SHIFT |
558 mask = GRC_CODE_FAST_MASK | GRC_CODE_SLOW_MASK |
560 ok &= _CHK(BXT_PORT_REF_DW6(phy), mask, grc_code,
561 "BXT_PORT_REF_DW6(%d)", phy);
563 mask = GRC_DIS | GRC_RDY_OVRD;
564 ok &= _CHK(BXT_PORT_REF_DW8(phy), mask, mask,
565 "BXT_PORT_REF_DW8(%d)", phy);
573 bxt_ddi_phy_calc_lane_lat_optim_mask(u8 lane_count)
575 switch (lane_count) {
579 return BIT(2) | BIT(0);
581 return BIT(3) | BIT(2) | BIT(0);
583 MISSING_CASE(lane_count);
589 void bxt_ddi_phy_set_lane_optim_mask(struct intel_encoder *encoder,
590 u8 lane_lat_optim_mask)
592 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
593 enum port port = encoder->port;
595 enum dpio_channel ch;
598 bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
600 for (lane = 0; lane < 4; lane++) {
601 u32 val = I915_READ(BXT_PORT_TX_DW14_LN(phy, ch, lane));
604 * Note that on CHV this flag is called UPAR, but has
607 val &= ~LATENCY_OPTIM;
608 if (lane_lat_optim_mask & BIT(lane))
609 val |= LATENCY_OPTIM;
611 I915_WRITE(BXT_PORT_TX_DW14_LN(phy, ch, lane), val);
616 bxt_ddi_phy_get_lane_lat_optim_mask(struct intel_encoder *encoder)
618 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
619 enum port port = encoder->port;
621 enum dpio_channel ch;
625 bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
628 for (lane = 0; lane < 4; lane++) {
629 u32 val = I915_READ(BXT_PORT_TX_DW14_LN(phy, ch, lane));
631 if (val & LATENCY_OPTIM)
639 void chv_set_phy_signal_level(struct intel_encoder *encoder,
640 u32 deemph_reg_value, u32 margin_reg_value,
641 bool uniq_trans_scale)
643 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
644 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
645 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
646 enum dpio_channel ch = vlv_dport_to_channel(dport);
647 enum pipe pipe = intel_crtc->pipe;
651 mutex_lock(&dev_priv->sb_lock);
653 /* Clear calc init */
654 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
655 val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
656 val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
657 val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
658 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
660 if (intel_crtc->config->lane_count > 2) {
661 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
662 val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
663 val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
664 val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
665 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
668 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch));
669 val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
670 val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
671 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val);
673 if (intel_crtc->config->lane_count > 2) {
674 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch));
675 val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
676 val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
677 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val);
680 /* Program swing deemph */
681 for (i = 0; i < intel_crtc->config->lane_count; i++) {
682 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i));
683 val &= ~DPIO_SWING_DEEMPH9P5_MASK;
684 val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT;
685 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val);
688 /* Program swing margin */
689 for (i = 0; i < intel_crtc->config->lane_count; i++) {
690 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i));
692 val &= ~DPIO_SWING_MARGIN000_MASK;
693 val |= margin_reg_value << DPIO_SWING_MARGIN000_SHIFT;
696 * Supposedly this value shouldn't matter when unique transition
697 * scale is disabled, but in fact it does matter. Let's just
698 * always program the same value and hope it's OK.
700 val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT);
701 val |= 0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT;
703 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val);
707 * The document said it needs to set bit 27 for ch0 and bit 26
708 * for ch1. Might be a typo in the doc.
709 * For now, for this unique transition scale selection, set bit
710 * 27 for ch0 and ch1.
712 for (i = 0; i < intel_crtc->config->lane_count; i++) {
713 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i));
714 if (uniq_trans_scale)
715 val |= DPIO_TX_UNIQ_TRANS_SCALE_EN;
717 val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;
718 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val);
721 /* Start swing calculation */
722 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
723 val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
724 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
726 if (intel_crtc->config->lane_count > 2) {
727 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
728 val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
729 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
732 mutex_unlock(&dev_priv->sb_lock);
736 void chv_data_lane_soft_reset(struct intel_encoder *encoder,
737 const struct intel_crtc_state *crtc_state,
740 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
741 enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base));
742 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
743 enum pipe pipe = crtc->pipe;
746 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
748 val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
750 val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET;
751 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
753 if (crtc_state->lane_count > 2) {
754 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
756 val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
758 val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET;
759 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
762 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
763 val |= CHV_PCS_REQ_SOFTRESET_EN;
765 val &= ~DPIO_PCS_CLK_SOFT_RESET;
767 val |= DPIO_PCS_CLK_SOFT_RESET;
768 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
770 if (crtc_state->lane_count > 2) {
771 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
772 val |= CHV_PCS_REQ_SOFTRESET_EN;
774 val &= ~DPIO_PCS_CLK_SOFT_RESET;
776 val |= DPIO_PCS_CLK_SOFT_RESET;
777 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
781 void chv_phy_pre_pll_enable(struct intel_encoder *encoder,
782 const struct intel_crtc_state *crtc_state)
784 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
785 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
786 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
787 enum dpio_channel ch = vlv_dport_to_channel(dport);
788 enum pipe pipe = crtc->pipe;
789 unsigned int lane_mask =
790 intel_dp_unused_lane_mask(crtc_state->lane_count);
794 * Must trick the second common lane into life.
795 * Otherwise we can't even access the PLL.
797 if (ch == DPIO_CH0 && pipe == PIPE_B)
798 dport->release_cl2_override =
799 !chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, true);
801 chv_phy_powergate_lanes(encoder, true, lane_mask);
803 mutex_lock(&dev_priv->sb_lock);
805 /* Assert data lane reset */
806 chv_data_lane_soft_reset(encoder, crtc_state, true);
808 /* program left/right clock distribution */
809 if (pipe != PIPE_B) {
810 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
811 val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
813 val |= CHV_BUFLEFTENA1_FORCE;
815 val |= CHV_BUFRIGHTENA1_FORCE;
816 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
818 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
819 val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
821 val |= CHV_BUFLEFTENA2_FORCE;
823 val |= CHV_BUFRIGHTENA2_FORCE;
824 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
827 /* program clock channel usage */
828 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch));
829 val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
831 val &= ~CHV_PCS_USEDCLKCHANNEL;
833 val |= CHV_PCS_USEDCLKCHANNEL;
834 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW8(ch), val);
836 if (crtc_state->lane_count > 2) {
837 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW8(ch));
838 val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
840 val &= ~CHV_PCS_USEDCLKCHANNEL;
842 val |= CHV_PCS_USEDCLKCHANNEL;
843 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW8(ch), val);
847 * This a a bit weird since generally CL
848 * matches the pipe, but here we need to
849 * pick the CL based on the port.
851 val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW19(ch));
853 val &= ~CHV_CMN_USEDCLKCHANNEL;
855 val |= CHV_CMN_USEDCLKCHANNEL;
856 vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val);
858 mutex_unlock(&dev_priv->sb_lock);
861 void chv_phy_pre_encoder_enable(struct intel_encoder *encoder,
862 const struct intel_crtc_state *crtc_state)
864 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
865 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
866 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
867 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
868 enum dpio_channel ch = vlv_dport_to_channel(dport);
869 enum pipe pipe = crtc->pipe;
870 int data, i, stagger;
873 mutex_lock(&dev_priv->sb_lock);
875 /* allow hardware to manage TX FIFO reset source */
876 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
877 val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
878 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
880 if (crtc_state->lane_count > 2) {
881 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
882 val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
883 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
886 /* Program Tx lane latency optimal setting*/
887 for (i = 0; i < crtc_state->lane_count; i++) {
888 /* Set the upar bit */
889 if (crtc_state->lane_count == 1)
892 data = (i == 1) ? 0x0 : 0x1;
893 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
894 data << DPIO_UPAR_SHIFT);
897 /* Data lane stagger programming */
898 if (crtc_state->port_clock > 270000)
900 else if (crtc_state->port_clock > 135000)
902 else if (crtc_state->port_clock > 67500)
904 else if (crtc_state->port_clock > 33750)
909 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
910 val |= DPIO_TX2_STAGGER_MASK(0x1f);
911 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
913 if (crtc_state->lane_count > 2) {
914 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
915 val |= DPIO_TX2_STAGGER_MASK(0x1f);
916 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
919 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch),
920 DPIO_LANESTAGGER_STRAP(stagger) |
921 DPIO_LANESTAGGER_STRAP_OVRD |
922 DPIO_TX1_STAGGER_MASK(0x1f) |
923 DPIO_TX1_STAGGER_MULT(6) |
924 DPIO_TX2_STAGGER_MULT(0));
926 if (crtc_state->lane_count > 2) {
927 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch),
928 DPIO_LANESTAGGER_STRAP(stagger) |
929 DPIO_LANESTAGGER_STRAP_OVRD |
930 DPIO_TX1_STAGGER_MASK(0x1f) |
931 DPIO_TX1_STAGGER_MULT(7) |
932 DPIO_TX2_STAGGER_MULT(5));
935 /* Deassert data lane reset */
936 chv_data_lane_soft_reset(encoder, crtc_state, false);
938 mutex_unlock(&dev_priv->sb_lock);
941 void chv_phy_release_cl2_override(struct intel_encoder *encoder)
943 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
944 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
946 if (dport->release_cl2_override) {
947 chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false);
948 dport->release_cl2_override = false;
952 void chv_phy_post_pll_disable(struct intel_encoder *encoder,
953 const struct intel_crtc_state *old_crtc_state)
955 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
956 enum pipe pipe = to_intel_crtc(old_crtc_state->base.crtc)->pipe;
959 mutex_lock(&dev_priv->sb_lock);
961 /* disable left/right clock distribution */
962 if (pipe != PIPE_B) {
963 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
964 val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
965 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
967 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
968 val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
969 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
972 mutex_unlock(&dev_priv->sb_lock);
975 * Leave the power down bit cleared for at least one
976 * lane so that chv_powergate_phy_ch() will power
977 * on something when the channel is otherwise unused.
978 * When the port is off and the override is removed
979 * the lanes power down anyway, so otherwise it doesn't
980 * really matter what the state of power down bits is
983 chv_phy_powergate_lanes(encoder, false, 0x0);
986 void vlv_set_phy_signal_level(struct intel_encoder *encoder,
987 u32 demph_reg_value, u32 preemph_reg_value,
988 u32 uniqtranscale_reg_value, u32 tx3_demph)
990 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
991 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
992 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
993 enum dpio_channel port = vlv_dport_to_channel(dport);
994 enum pipe pipe = intel_crtc->pipe;
996 mutex_lock(&dev_priv->sb_lock);
997 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0x00000000);
998 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(port), demph_reg_value);
999 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(port),
1000 uniqtranscale_reg_value);
1001 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(port), 0x0C782040);
1004 vlv_dpio_write(dev_priv, pipe, VLV_TX3_DW4(port), tx3_demph);
1006 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW11(port), 0x00030000);
1007 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW9(port), preemph_reg_value);
1008 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), DPIO_TX_OCALINIT_EN);
1009 mutex_unlock(&dev_priv->sb_lock);
1012 void vlv_phy_pre_pll_enable(struct intel_encoder *encoder,
1013 const struct intel_crtc_state *crtc_state)
1015 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
1016 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1017 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
1018 enum dpio_channel port = vlv_dport_to_channel(dport);
1019 enum pipe pipe = crtc->pipe;
1021 /* Program Tx lane resets to default */
1022 mutex_lock(&dev_priv->sb_lock);
1023 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port),
1024 DPIO_PCS_TX_LANE2_RESET |
1025 DPIO_PCS_TX_LANE1_RESET);
1026 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port),
1027 DPIO_PCS_CLK_CRI_RXEB_EIOS_EN |
1028 DPIO_PCS_CLK_CRI_RXDIGFILTSG_EN |
1029 (1<<DPIO_PCS_CLK_DATAWIDTH_SHIFT) |
1030 DPIO_PCS_CLK_SOFT_RESET);
1032 /* Fix up inter-pair skew failure */
1033 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW12(port), 0x00750f00);
1034 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW11(port), 0x00001500);
1035 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW14(port), 0x40400000);
1036 mutex_unlock(&dev_priv->sb_lock);
1039 void vlv_phy_pre_encoder_enable(struct intel_encoder *encoder,
1040 const struct intel_crtc_state *crtc_state)
1042 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
1043 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
1044 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1045 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
1046 enum dpio_channel port = vlv_dport_to_channel(dport);
1047 enum pipe pipe = crtc->pipe;
1050 mutex_lock(&dev_priv->sb_lock);
1052 /* Enable clock channels for this port */
1053 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(port));
1060 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW8(port), val);
1062 /* Program lane clock */
1063 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW14(port), 0x00760018);
1064 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW23(port), 0x00400888);
1066 mutex_unlock(&dev_priv->sb_lock);
1069 void vlv_phy_reset_lanes(struct intel_encoder *encoder,
1070 const struct intel_crtc_state *old_crtc_state)
1072 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
1073 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1074 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
1075 enum dpio_channel port = vlv_dport_to_channel(dport);
1076 enum pipe pipe = crtc->pipe;
1078 mutex_lock(&dev_priv->sb_lock);
1079 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port), 0x00000000);
1080 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port), 0x00e00060);
1081 mutex_unlock(&dev_priv->sb_lock);