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25 #include "intel_dpio_phy.h"
26 #include "intel_drv.h"
27 #include "intel_sideband.h"
32 * VLV, CHV and BXT have slightly peculiar display PHYs for driving DP/HDMI
33 * ports. DPIO is the name given to such a display PHY. These PHYs
34 * don't follow the standard programming model using direct MMIO
35 * registers, and instead their registers must be accessed trough IOSF
36 * sideband. VLV has one such PHY for driving ports B and C, and CHV
37 * adds another PHY for driving port D. Each PHY responds to specific
40 * Each display PHY is made up of one or two channels. Each channel
41 * houses a common lane part which contains the PLL and other common
42 * logic. CH0 common lane also contains the IOSF-SB logic for the
43 * Common Register Interface (CRI) ie. the DPIO registers. CRI clock
44 * must be running when any DPIO registers are accessed.
46 * In addition to having their own registers, the PHYs are also
47 * controlled through some dedicated signals from the display
48 * controller. These include PLL reference clock enable, PLL enable,
49 * and CRI clock selection, for example.
51 * Eeach channel also has two splines (also called data lanes), and
52 * each spline is made up of one Physical Access Coding Sub-Layer
53 * (PCS) block and two TX lanes. So each channel has two PCS blocks
54 * and four TX lanes. The TX lanes are used as DP lanes or TMDS
55 * data/clock pairs depending on the output type.
57 * Additionally the PHY also contains an AUX lane with AUX blocks
58 * for each channel. This is used for DP AUX communication, but
59 * this fact isn't really relevant for the driver since AUX is
60 * controlled from the display controller side. No DPIO registers
61 * need to be accessed during AUX communication,
63 * Generally on VLV/CHV the common lane corresponds to the pipe and
64 * the spline (PCS/TX) corresponds to the port.
66 * For dual channel PHY (VLV/CHV):
68 * pipe A == CMN/PLL/REF CH0
70 * pipe B == CMN/PLL/REF CH1
72 * port B == PCS/TX CH0
74 * port C == PCS/TX CH1
76 * This is especially important when we cross the streams
77 * ie. drive port B with pipe B, or port C with pipe A.
79 * For single channel PHY (CHV):
81 * pipe C == CMN/PLL/REF CH0
83 * port D == PCS/TX CH0
85 * On BXT the entire PHY channel corresponds to the port. That means
86 * the PLL is also now associated with the port rather than the pipe,
87 * and so the clock needs to be routed to the appropriate transcoder.
88 * Port A PLL is directly connected to transcoder EDP and port B/C
89 * PLLs can be routed to any transcoder A/B/C.
91 * Note: DDI0 is digital port B, DD1 is digital port C, and DDI2 is
92 * digital port D (CHV) or port A (BXT). ::
95 * Dual channel PHY (VLV/CHV/BXT)
96 * ---------------------------------
98 * | CMN/PLL/REF | CMN/PLL/REF |
99 * |---------------|---------------| Display PHY
100 * | PCS01 | PCS23 | PCS01 | PCS23 |
101 * |-------|-------|-------|-------|
102 * |TX0|TX1|TX2|TX3|TX0|TX1|TX2|TX3|
103 * ---------------------------------
104 * | DDI0 | DDI1 | DP/HDMI ports
105 * ---------------------------------
107 * Single channel PHY (CHV/BXT)
111 * |---------------| Display PHY
116 * | DDI2 | DP/HDMI port
121 * struct bxt_ddi_phy_info - Hold info for a broxton DDI phy
123 struct bxt_ddi_phy_info {
125 * @dual_channel: true if this phy has a second channel.
130 * @rcomp_phy: If -1, indicates this phy has its own rcomp resistor.
131 * Otherwise the GRC value will be copied from the phy indicated by
134 enum dpio_phy rcomp_phy;
137 * @reset_delay: delay in us to wait before setting the common reset
138 * bit in BXT_PHY_CTL_FAMILY, which effectively enables the phy.
143 * @pwron_mask: Mask with the appropriate bit set that would cause the
144 * punit to power this phy if written to BXT_P_CR_GT_DISP_PWRON.
149 * @channel: struct containing per channel information.
153 * @channel.port: which port maps to this channel.
159 static const struct bxt_ddi_phy_info bxt_ddi_phy_info[] = {
161 .dual_channel = true,
162 .rcomp_phy = DPIO_PHY1,
163 .pwron_mask = BIT(0),
166 [DPIO_CH0] = { .port = PORT_B },
167 [DPIO_CH1] = { .port = PORT_C },
171 .dual_channel = false,
173 .pwron_mask = BIT(1),
176 [DPIO_CH0] = { .port = PORT_A },
181 static const struct bxt_ddi_phy_info glk_ddi_phy_info[] = {
183 .dual_channel = false,
184 .rcomp_phy = DPIO_PHY1,
185 .pwron_mask = BIT(0),
189 [DPIO_CH0] = { .port = PORT_B },
193 .dual_channel = false,
195 .pwron_mask = BIT(3),
199 [DPIO_CH0] = { .port = PORT_A },
203 .dual_channel = false,
204 .rcomp_phy = DPIO_PHY1,
205 .pwron_mask = BIT(1),
209 [DPIO_CH0] = { .port = PORT_C },
214 static const struct bxt_ddi_phy_info *
215 bxt_get_phy_list(struct drm_i915_private *dev_priv, int *count)
217 if (IS_GEMINILAKE(dev_priv)) {
218 *count = ARRAY_SIZE(glk_ddi_phy_info);
219 return glk_ddi_phy_info;
221 *count = ARRAY_SIZE(bxt_ddi_phy_info);
222 return bxt_ddi_phy_info;
226 static const struct bxt_ddi_phy_info *
227 bxt_get_phy_info(struct drm_i915_private *dev_priv, enum dpio_phy phy)
230 const struct bxt_ddi_phy_info *phy_list =
231 bxt_get_phy_list(dev_priv, &count);
233 return &phy_list[phy];
236 void bxt_port_to_phy_channel(struct drm_i915_private *dev_priv, enum port port,
237 enum dpio_phy *phy, enum dpio_channel *ch)
239 const struct bxt_ddi_phy_info *phy_info, *phys;
242 phys = bxt_get_phy_list(dev_priv, &count);
244 for (i = 0; i < count; i++) {
247 if (port == phy_info->channel[DPIO_CH0].port) {
253 if (phy_info->dual_channel &&
254 port == phy_info->channel[DPIO_CH1].port) {
261 WARN(1, "PHY not found for PORT %c", port_name(port));
266 void bxt_ddi_phy_set_signal_level(struct drm_i915_private *dev_priv,
267 enum port port, u32 margin, u32 scale,
268 u32 enable, u32 deemphasis)
272 enum dpio_channel ch;
274 bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
277 * While we write to the group register to program all lanes at once we
278 * can read only lane registers and we pick lanes 0/1 for that.
280 val = I915_READ(BXT_PORT_PCS_DW10_LN01(phy, ch));
281 val &= ~(TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT);
282 I915_WRITE(BXT_PORT_PCS_DW10_GRP(phy, ch), val);
284 val = I915_READ(BXT_PORT_TX_DW2_LN0(phy, ch));
285 val &= ~(MARGIN_000 | UNIQ_TRANS_SCALE);
286 val |= margin << MARGIN_000_SHIFT | scale << UNIQ_TRANS_SCALE_SHIFT;
287 I915_WRITE(BXT_PORT_TX_DW2_GRP(phy, ch), val);
289 val = I915_READ(BXT_PORT_TX_DW3_LN0(phy, ch));
290 val &= ~SCALE_DCOMP_METHOD;
292 val |= SCALE_DCOMP_METHOD;
294 if ((val & UNIQUE_TRANGE_EN_METHOD) && !(val & SCALE_DCOMP_METHOD))
295 DRM_ERROR("Disabled scaling while ouniqetrangenmethod was set");
297 I915_WRITE(BXT_PORT_TX_DW3_GRP(phy, ch), val);
299 val = I915_READ(BXT_PORT_TX_DW4_LN0(phy, ch));
301 val |= deemphasis << DEEMPH_SHIFT;
302 I915_WRITE(BXT_PORT_TX_DW4_GRP(phy, ch), val);
304 val = I915_READ(BXT_PORT_PCS_DW10_LN01(phy, ch));
305 val |= TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT;
306 I915_WRITE(BXT_PORT_PCS_DW10_GRP(phy, ch), val);
309 bool bxt_ddi_phy_is_enabled(struct drm_i915_private *dev_priv,
312 const struct bxt_ddi_phy_info *phy_info;
314 phy_info = bxt_get_phy_info(dev_priv, phy);
316 if (!(I915_READ(BXT_P_CR_GT_DISP_PWRON) & phy_info->pwron_mask))
319 if ((I915_READ(BXT_PORT_CL1CM_DW0(phy)) &
320 (PHY_POWER_GOOD | PHY_RESERVED)) != PHY_POWER_GOOD) {
321 DRM_DEBUG_DRIVER("DDI PHY %d powered, but power hasn't settled\n",
327 if (!(I915_READ(BXT_PHY_CTL_FAMILY(phy)) & COMMON_RESET_DIS)) {
328 DRM_DEBUG_DRIVER("DDI PHY %d powered, but still in reset\n",
337 static u32 bxt_get_grc(struct drm_i915_private *dev_priv, enum dpio_phy phy)
339 u32 val = I915_READ(BXT_PORT_REF_DW6(phy));
341 return (val & GRC_CODE_MASK) >> GRC_CODE_SHIFT;
344 static void bxt_phy_wait_grc_done(struct drm_i915_private *dev_priv,
347 if (intel_wait_for_register(&dev_priv->uncore,
348 BXT_PORT_REF_DW3(phy),
351 DRM_ERROR("timeout waiting for PHY%d GRC\n", phy);
354 static void _bxt_ddi_phy_init(struct drm_i915_private *dev_priv,
357 const struct bxt_ddi_phy_info *phy_info;
360 phy_info = bxt_get_phy_info(dev_priv, phy);
362 if (bxt_ddi_phy_is_enabled(dev_priv, phy)) {
363 /* Still read out the GRC value for state verification */
364 if (phy_info->rcomp_phy != -1)
365 dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv, phy);
367 if (bxt_ddi_phy_verify_state(dev_priv, phy)) {
368 DRM_DEBUG_DRIVER("DDI PHY %d already enabled, "
369 "won't reprogram it\n", phy);
373 DRM_DEBUG_DRIVER("DDI PHY %d enabled with invalid state, "
374 "force reprogramming it\n", phy);
377 val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
378 val |= phy_info->pwron_mask;
379 I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val);
382 * The PHY registers start out inaccessible and respond to reads with
383 * all 1s. Eventually they become accessible as they power up, then
384 * the reserved bit will give the default 0. Poll on the reserved bit
385 * becoming 0 to find when the PHY is accessible.
386 * The flag should get set in 100us according to the HW team, but
387 * use 1ms due to occasional timeouts observed with that.
389 if (intel_wait_for_register_fw(&dev_priv->uncore,
390 BXT_PORT_CL1CM_DW0(phy),
391 PHY_RESERVED | PHY_POWER_GOOD,
394 DRM_ERROR("timeout during PHY%d power on\n", phy);
396 /* Program PLL Rcomp code offset */
397 val = I915_READ(BXT_PORT_CL1CM_DW9(phy));
398 val &= ~IREF0RC_OFFSET_MASK;
399 val |= 0xE4 << IREF0RC_OFFSET_SHIFT;
400 I915_WRITE(BXT_PORT_CL1CM_DW9(phy), val);
402 val = I915_READ(BXT_PORT_CL1CM_DW10(phy));
403 val &= ~IREF1RC_OFFSET_MASK;
404 val |= 0xE4 << IREF1RC_OFFSET_SHIFT;
405 I915_WRITE(BXT_PORT_CL1CM_DW10(phy), val);
407 /* Program power gating */
408 val = I915_READ(BXT_PORT_CL1CM_DW28(phy));
409 val |= OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN |
411 I915_WRITE(BXT_PORT_CL1CM_DW28(phy), val);
413 if (phy_info->dual_channel) {
414 val = I915_READ(BXT_PORT_CL2CM_DW6(phy));
415 val |= DW6_OLDO_DYN_PWR_DOWN_EN;
416 I915_WRITE(BXT_PORT_CL2CM_DW6(phy), val);
419 if (phy_info->rcomp_phy != -1) {
422 bxt_phy_wait_grc_done(dev_priv, phy_info->rcomp_phy);
425 * PHY0 isn't connected to an RCOMP resistor so copy over
426 * the corresponding calibrated value from PHY1, and disable
427 * the automatic calibration on PHY0.
429 val = dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv,
430 phy_info->rcomp_phy);
431 grc_code = val << GRC_CODE_FAST_SHIFT |
432 val << GRC_CODE_SLOW_SHIFT |
434 I915_WRITE(BXT_PORT_REF_DW6(phy), grc_code);
436 val = I915_READ(BXT_PORT_REF_DW8(phy));
437 val |= GRC_DIS | GRC_RDY_OVRD;
438 I915_WRITE(BXT_PORT_REF_DW8(phy), val);
441 if (phy_info->reset_delay)
442 udelay(phy_info->reset_delay);
444 val = I915_READ(BXT_PHY_CTL_FAMILY(phy));
445 val |= COMMON_RESET_DIS;
446 I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val);
449 void bxt_ddi_phy_uninit(struct drm_i915_private *dev_priv, enum dpio_phy phy)
451 const struct bxt_ddi_phy_info *phy_info;
454 phy_info = bxt_get_phy_info(dev_priv, phy);
456 val = I915_READ(BXT_PHY_CTL_FAMILY(phy));
457 val &= ~COMMON_RESET_DIS;
458 I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val);
460 val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
461 val &= ~phy_info->pwron_mask;
462 I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val);
465 void bxt_ddi_phy_init(struct drm_i915_private *dev_priv, enum dpio_phy phy)
467 const struct bxt_ddi_phy_info *phy_info =
468 bxt_get_phy_info(dev_priv, phy);
469 enum dpio_phy rcomp_phy = phy_info->rcomp_phy;
472 lockdep_assert_held(&dev_priv->power_domains.lock);
476 was_enabled = bxt_ddi_phy_is_enabled(dev_priv, rcomp_phy);
479 * We need to copy the GRC calibration value from rcomp_phy,
480 * so make sure it's powered up.
483 _bxt_ddi_phy_init(dev_priv, rcomp_phy);
485 _bxt_ddi_phy_init(dev_priv, phy);
488 bxt_ddi_phy_uninit(dev_priv, rcomp_phy);
491 static bool __printf(6, 7)
492 __phy_reg_verify_state(struct drm_i915_private *dev_priv, enum dpio_phy phy,
493 i915_reg_t reg, u32 mask, u32 expected,
494 const char *reg_fmt, ...)
496 struct va_format vaf;
500 val = I915_READ(reg);
501 if ((val & mask) == expected)
504 va_start(args, reg_fmt);
508 DRM_DEBUG_DRIVER("DDI PHY %d reg %pV [%08x] state mismatch: "
509 "current %08x, expected %08x (mask %08x)\n",
510 phy, &vaf, reg.reg, val, (val & ~mask) | expected,
518 bool bxt_ddi_phy_verify_state(struct drm_i915_private *dev_priv,
521 const struct bxt_ddi_phy_info *phy_info;
525 phy_info = bxt_get_phy_info(dev_priv, phy);
527 #define _CHK(reg, mask, exp, fmt, ...) \
528 __phy_reg_verify_state(dev_priv, phy, reg, mask, exp, fmt, \
531 if (!bxt_ddi_phy_is_enabled(dev_priv, phy))
536 /* PLL Rcomp code offset */
537 ok &= _CHK(BXT_PORT_CL1CM_DW9(phy),
538 IREF0RC_OFFSET_MASK, 0xe4 << IREF0RC_OFFSET_SHIFT,
539 "BXT_PORT_CL1CM_DW9(%d)", phy);
540 ok &= _CHK(BXT_PORT_CL1CM_DW10(phy),
541 IREF1RC_OFFSET_MASK, 0xe4 << IREF1RC_OFFSET_SHIFT,
542 "BXT_PORT_CL1CM_DW10(%d)", phy);
545 mask = OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN | SUS_CLK_CONFIG;
546 ok &= _CHK(BXT_PORT_CL1CM_DW28(phy), mask, mask,
547 "BXT_PORT_CL1CM_DW28(%d)", phy);
549 if (phy_info->dual_channel)
550 ok &= _CHK(BXT_PORT_CL2CM_DW6(phy),
551 DW6_OLDO_DYN_PWR_DOWN_EN, DW6_OLDO_DYN_PWR_DOWN_EN,
552 "BXT_PORT_CL2CM_DW6(%d)", phy);
554 if (phy_info->rcomp_phy != -1) {
555 u32 grc_code = dev_priv->bxt_phy_grc;
557 grc_code = grc_code << GRC_CODE_FAST_SHIFT |
558 grc_code << GRC_CODE_SLOW_SHIFT |
560 mask = GRC_CODE_FAST_MASK | GRC_CODE_SLOW_MASK |
562 ok &= _CHK(BXT_PORT_REF_DW6(phy), mask, grc_code,
563 "BXT_PORT_REF_DW6(%d)", phy);
565 mask = GRC_DIS | GRC_RDY_OVRD;
566 ok &= _CHK(BXT_PORT_REF_DW8(phy), mask, mask,
567 "BXT_PORT_REF_DW8(%d)", phy);
575 bxt_ddi_phy_calc_lane_lat_optim_mask(u8 lane_count)
577 switch (lane_count) {
581 return BIT(2) | BIT(0);
583 return BIT(3) | BIT(2) | BIT(0);
585 MISSING_CASE(lane_count);
591 void bxt_ddi_phy_set_lane_optim_mask(struct intel_encoder *encoder,
592 u8 lane_lat_optim_mask)
594 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
595 enum port port = encoder->port;
597 enum dpio_channel ch;
600 bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
602 for (lane = 0; lane < 4; lane++) {
603 u32 val = I915_READ(BXT_PORT_TX_DW14_LN(phy, ch, lane));
606 * Note that on CHV this flag is called UPAR, but has
609 val &= ~LATENCY_OPTIM;
610 if (lane_lat_optim_mask & BIT(lane))
611 val |= LATENCY_OPTIM;
613 I915_WRITE(BXT_PORT_TX_DW14_LN(phy, ch, lane), val);
618 bxt_ddi_phy_get_lane_lat_optim_mask(struct intel_encoder *encoder)
620 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
621 enum port port = encoder->port;
623 enum dpio_channel ch;
627 bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
630 for (lane = 0; lane < 4; lane++) {
631 u32 val = I915_READ(BXT_PORT_TX_DW14_LN(phy, ch, lane));
633 if (val & LATENCY_OPTIM)
641 void chv_set_phy_signal_level(struct intel_encoder *encoder,
642 u32 deemph_reg_value, u32 margin_reg_value,
643 bool uniq_trans_scale)
645 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
646 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
647 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
648 enum dpio_channel ch = vlv_dport_to_channel(dport);
649 enum pipe pipe = intel_crtc->pipe;
653 vlv_dpio_get(dev_priv);
655 /* Clear calc init */
656 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
657 val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
658 val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
659 val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
660 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
662 if (intel_crtc->config->lane_count > 2) {
663 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
664 val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
665 val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
666 val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
667 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
670 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch));
671 val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
672 val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
673 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val);
675 if (intel_crtc->config->lane_count > 2) {
676 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch));
677 val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
678 val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
679 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val);
682 /* Program swing deemph */
683 for (i = 0; i < intel_crtc->config->lane_count; i++) {
684 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i));
685 val &= ~DPIO_SWING_DEEMPH9P5_MASK;
686 val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT;
687 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val);
690 /* Program swing margin */
691 for (i = 0; i < intel_crtc->config->lane_count; i++) {
692 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i));
694 val &= ~DPIO_SWING_MARGIN000_MASK;
695 val |= margin_reg_value << DPIO_SWING_MARGIN000_SHIFT;
698 * Supposedly this value shouldn't matter when unique transition
699 * scale is disabled, but in fact it does matter. Let's just
700 * always program the same value and hope it's OK.
702 val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT);
703 val |= 0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT;
705 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val);
709 * The document said it needs to set bit 27 for ch0 and bit 26
710 * for ch1. Might be a typo in the doc.
711 * For now, for this unique transition scale selection, set bit
712 * 27 for ch0 and ch1.
714 for (i = 0; i < intel_crtc->config->lane_count; i++) {
715 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i));
716 if (uniq_trans_scale)
717 val |= DPIO_TX_UNIQ_TRANS_SCALE_EN;
719 val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;
720 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val);
723 /* Start swing calculation */
724 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
725 val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
726 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
728 if (intel_crtc->config->lane_count > 2) {
729 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
730 val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
731 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
734 vlv_dpio_put(dev_priv);
737 void chv_data_lane_soft_reset(struct intel_encoder *encoder,
738 const struct intel_crtc_state *crtc_state,
741 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
742 enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base));
743 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
744 enum pipe pipe = crtc->pipe;
747 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
749 val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
751 val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET;
752 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
754 if (crtc_state->lane_count > 2) {
755 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
757 val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
759 val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET;
760 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
763 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
764 val |= CHV_PCS_REQ_SOFTRESET_EN;
766 val &= ~DPIO_PCS_CLK_SOFT_RESET;
768 val |= DPIO_PCS_CLK_SOFT_RESET;
769 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
771 if (crtc_state->lane_count > 2) {
772 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
773 val |= CHV_PCS_REQ_SOFTRESET_EN;
775 val &= ~DPIO_PCS_CLK_SOFT_RESET;
777 val |= DPIO_PCS_CLK_SOFT_RESET;
778 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
782 void chv_phy_pre_pll_enable(struct intel_encoder *encoder,
783 const struct intel_crtc_state *crtc_state)
785 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
786 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
787 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
788 enum dpio_channel ch = vlv_dport_to_channel(dport);
789 enum pipe pipe = crtc->pipe;
790 unsigned int lane_mask =
791 intel_dp_unused_lane_mask(crtc_state->lane_count);
795 * Must trick the second common lane into life.
796 * Otherwise we can't even access the PLL.
798 if (ch == DPIO_CH0 && pipe == PIPE_B)
799 dport->release_cl2_override =
800 !chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, true);
802 chv_phy_powergate_lanes(encoder, true, lane_mask);
804 vlv_dpio_get(dev_priv);
806 /* Assert data lane reset */
807 chv_data_lane_soft_reset(encoder, crtc_state, true);
809 /* program left/right clock distribution */
810 if (pipe != PIPE_B) {
811 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
812 val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
814 val |= CHV_BUFLEFTENA1_FORCE;
816 val |= CHV_BUFRIGHTENA1_FORCE;
817 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
819 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
820 val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
822 val |= CHV_BUFLEFTENA2_FORCE;
824 val |= CHV_BUFRIGHTENA2_FORCE;
825 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
828 /* program clock channel usage */
829 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch));
830 val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
832 val &= ~CHV_PCS_USEDCLKCHANNEL;
834 val |= CHV_PCS_USEDCLKCHANNEL;
835 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW8(ch), val);
837 if (crtc_state->lane_count > 2) {
838 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW8(ch));
839 val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
841 val &= ~CHV_PCS_USEDCLKCHANNEL;
843 val |= CHV_PCS_USEDCLKCHANNEL;
844 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW8(ch), val);
848 * This a a bit weird since generally CL
849 * matches the pipe, but here we need to
850 * pick the CL based on the port.
852 val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW19(ch));
854 val &= ~CHV_CMN_USEDCLKCHANNEL;
856 val |= CHV_CMN_USEDCLKCHANNEL;
857 vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val);
859 vlv_dpio_put(dev_priv);
862 void chv_phy_pre_encoder_enable(struct intel_encoder *encoder,
863 const struct intel_crtc_state *crtc_state)
865 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
866 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
867 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
868 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
869 enum dpio_channel ch = vlv_dport_to_channel(dport);
870 enum pipe pipe = crtc->pipe;
871 int data, i, stagger;
874 vlv_dpio_get(dev_priv);
876 /* allow hardware to manage TX FIFO reset source */
877 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
878 val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
879 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
881 if (crtc_state->lane_count > 2) {
882 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
883 val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
884 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
887 /* Program Tx lane latency optimal setting*/
888 for (i = 0; i < crtc_state->lane_count; i++) {
889 /* Set the upar bit */
890 if (crtc_state->lane_count == 1)
893 data = (i == 1) ? 0x0 : 0x1;
894 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
895 data << DPIO_UPAR_SHIFT);
898 /* Data lane stagger programming */
899 if (crtc_state->port_clock > 270000)
901 else if (crtc_state->port_clock > 135000)
903 else if (crtc_state->port_clock > 67500)
905 else if (crtc_state->port_clock > 33750)
910 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
911 val |= DPIO_TX2_STAGGER_MASK(0x1f);
912 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
914 if (crtc_state->lane_count > 2) {
915 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
916 val |= DPIO_TX2_STAGGER_MASK(0x1f);
917 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
920 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch),
921 DPIO_LANESTAGGER_STRAP(stagger) |
922 DPIO_LANESTAGGER_STRAP_OVRD |
923 DPIO_TX1_STAGGER_MASK(0x1f) |
924 DPIO_TX1_STAGGER_MULT(6) |
925 DPIO_TX2_STAGGER_MULT(0));
927 if (crtc_state->lane_count > 2) {
928 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch),
929 DPIO_LANESTAGGER_STRAP(stagger) |
930 DPIO_LANESTAGGER_STRAP_OVRD |
931 DPIO_TX1_STAGGER_MASK(0x1f) |
932 DPIO_TX1_STAGGER_MULT(7) |
933 DPIO_TX2_STAGGER_MULT(5));
936 /* Deassert data lane reset */
937 chv_data_lane_soft_reset(encoder, crtc_state, false);
939 vlv_dpio_put(dev_priv);
942 void chv_phy_release_cl2_override(struct intel_encoder *encoder)
944 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
945 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
947 if (dport->release_cl2_override) {
948 chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false);
949 dport->release_cl2_override = false;
953 void chv_phy_post_pll_disable(struct intel_encoder *encoder,
954 const struct intel_crtc_state *old_crtc_state)
956 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
957 enum pipe pipe = to_intel_crtc(old_crtc_state->base.crtc)->pipe;
960 vlv_dpio_get(dev_priv);
962 /* disable left/right clock distribution */
963 if (pipe != PIPE_B) {
964 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
965 val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
966 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
968 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
969 val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
970 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
973 vlv_dpio_put(dev_priv);
976 * Leave the power down bit cleared for at least one
977 * lane so that chv_powergate_phy_ch() will power
978 * on something when the channel is otherwise unused.
979 * When the port is off and the override is removed
980 * the lanes power down anyway, so otherwise it doesn't
981 * really matter what the state of power down bits is
984 chv_phy_powergate_lanes(encoder, false, 0x0);
987 void vlv_set_phy_signal_level(struct intel_encoder *encoder,
988 u32 demph_reg_value, u32 preemph_reg_value,
989 u32 uniqtranscale_reg_value, u32 tx3_demph)
991 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
992 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
993 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
994 enum dpio_channel port = vlv_dport_to_channel(dport);
995 enum pipe pipe = intel_crtc->pipe;
997 vlv_dpio_get(dev_priv);
999 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0x00000000);
1000 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(port), demph_reg_value);
1001 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(port),
1002 uniqtranscale_reg_value);
1003 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(port), 0x0C782040);
1006 vlv_dpio_write(dev_priv, pipe, VLV_TX3_DW4(port), tx3_demph);
1008 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW11(port), 0x00030000);
1009 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW9(port), preemph_reg_value);
1010 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), DPIO_TX_OCALINIT_EN);
1012 vlv_dpio_put(dev_priv);
1015 void vlv_phy_pre_pll_enable(struct intel_encoder *encoder,
1016 const struct intel_crtc_state *crtc_state)
1018 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
1019 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1020 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
1021 enum dpio_channel port = vlv_dport_to_channel(dport);
1022 enum pipe pipe = crtc->pipe;
1024 /* Program Tx lane resets to default */
1025 vlv_dpio_get(dev_priv);
1027 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port),
1028 DPIO_PCS_TX_LANE2_RESET |
1029 DPIO_PCS_TX_LANE1_RESET);
1030 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port),
1031 DPIO_PCS_CLK_CRI_RXEB_EIOS_EN |
1032 DPIO_PCS_CLK_CRI_RXDIGFILTSG_EN |
1033 (1<<DPIO_PCS_CLK_DATAWIDTH_SHIFT) |
1034 DPIO_PCS_CLK_SOFT_RESET);
1036 /* Fix up inter-pair skew failure */
1037 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW12(port), 0x00750f00);
1038 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW11(port), 0x00001500);
1039 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW14(port), 0x40400000);
1041 vlv_dpio_put(dev_priv);
1044 void vlv_phy_pre_encoder_enable(struct intel_encoder *encoder,
1045 const struct intel_crtc_state *crtc_state)
1047 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
1048 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
1049 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1050 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
1051 enum dpio_channel port = vlv_dport_to_channel(dport);
1052 enum pipe pipe = crtc->pipe;
1055 vlv_dpio_get(dev_priv);
1057 /* Enable clock channels for this port */
1058 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(port));
1065 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW8(port), val);
1067 /* Program lane clock */
1068 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW14(port), 0x00760018);
1069 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW23(port), 0x00400888);
1071 vlv_dpio_put(dev_priv);
1074 void vlv_phy_reset_lanes(struct intel_encoder *encoder,
1075 const struct intel_crtc_state *old_crtc_state)
1077 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
1078 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1079 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
1080 enum dpio_channel port = vlv_dport_to_channel(dport);
1081 enum pipe pipe = crtc->pipe;
1083 vlv_dpio_get(dev_priv);
1084 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port), 0x00000000);
1085 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port), 0x00e00060);
1086 vlv_dpio_put(dev_priv);