/* * Copyright © 2014-2016 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ #include "intel_dp.h" #include "intel_dpio_phy.h" #include "intel_drv.h" #include "intel_sideband.h" /** * DOC: DPIO * * VLV, CHV and BXT have slightly peculiar display PHYs for driving DP/HDMI * ports. DPIO is the name given to such a display PHY. These PHYs * don't follow the standard programming model using direct MMIO * registers, and instead their registers must be accessed trough IOSF * sideband. VLV has one such PHY for driving ports B and C, and CHV * adds another PHY for driving port D. Each PHY responds to specific * IOSF-SB port. * * Each display PHY is made up of one or two channels. Each channel * houses a common lane part which contains the PLL and other common * logic. CH0 common lane also contains the IOSF-SB logic for the * Common Register Interface (CRI) ie. the DPIO registers. CRI clock * must be running when any DPIO registers are accessed. * * In addition to having their own registers, the PHYs are also * controlled through some dedicated signals from the display * controller. These include PLL reference clock enable, PLL enable, * and CRI clock selection, for example. * * Eeach channel also has two splines (also called data lanes), and * each spline is made up of one Physical Access Coding Sub-Layer * (PCS) block and two TX lanes. So each channel has two PCS blocks * and four TX lanes. The TX lanes are used as DP lanes or TMDS * data/clock pairs depending on the output type. * * Additionally the PHY also contains an AUX lane with AUX blocks * for each channel. This is used for DP AUX communication, but * this fact isn't really relevant for the driver since AUX is * controlled from the display controller side. No DPIO registers * need to be accessed during AUX communication, * * Generally on VLV/CHV the common lane corresponds to the pipe and * the spline (PCS/TX) corresponds to the port. * * For dual channel PHY (VLV/CHV): * * pipe A == CMN/PLL/REF CH0 * * pipe B == CMN/PLL/REF CH1 * * port B == PCS/TX CH0 * * port C == PCS/TX CH1 * * This is especially important when we cross the streams * ie. drive port B with pipe B, or port C with pipe A. * * For single channel PHY (CHV): * * pipe C == CMN/PLL/REF CH0 * * port D == PCS/TX CH0 * * On BXT the entire PHY channel corresponds to the port. That means * the PLL is also now associated with the port rather than the pipe, * and so the clock needs to be routed to the appropriate transcoder. * Port A PLL is directly connected to transcoder EDP and port B/C * PLLs can be routed to any transcoder A/B/C. * * Note: DDI0 is digital port B, DD1 is digital port C, and DDI2 is * digital port D (CHV) or port A (BXT). :: * * * Dual channel PHY (VLV/CHV/BXT) * --------------------------------- * | CH0 | CH1 | * | CMN/PLL/REF | CMN/PLL/REF | * |---------------|---------------| Display PHY * | PCS01 | PCS23 | PCS01 | PCS23 | * |-------|-------|-------|-------| * |TX0|TX1|TX2|TX3|TX0|TX1|TX2|TX3| * --------------------------------- * | DDI0 | DDI1 | DP/HDMI ports * --------------------------------- * * Single channel PHY (CHV/BXT) * ----------------- * | CH0 | * | CMN/PLL/REF | * |---------------| Display PHY * | PCS01 | PCS23 | * |-------|-------| * |TX0|TX1|TX2|TX3| * ----------------- * | DDI2 | DP/HDMI port * ----------------- */ /** * struct bxt_ddi_phy_info - Hold info for a broxton DDI phy */ struct bxt_ddi_phy_info { /** * @dual_channel: true if this phy has a second channel. */ bool dual_channel; /** * @rcomp_phy: If -1, indicates this phy has its own rcomp resistor. * Otherwise the GRC value will be copied from the phy indicated by * this field. */ enum dpio_phy rcomp_phy; /** * @reset_delay: delay in us to wait before setting the common reset * bit in BXT_PHY_CTL_FAMILY, which effectively enables the phy. */ int reset_delay; /** * @pwron_mask: Mask with the appropriate bit set that would cause the * punit to power this phy if written to BXT_P_CR_GT_DISP_PWRON. */ u32 pwron_mask; /** * @channel: struct containing per channel information. */ struct { /** * @channel.port: which port maps to this channel. */ enum port port; } channel[2]; }; static const struct bxt_ddi_phy_info bxt_ddi_phy_info[] = { [DPIO_PHY0] = { .dual_channel = true, .rcomp_phy = DPIO_PHY1, .pwron_mask = BIT(0), .channel = { [DPIO_CH0] = { .port = PORT_B }, [DPIO_CH1] = { .port = PORT_C }, } }, [DPIO_PHY1] = { .dual_channel = false, .rcomp_phy = -1, .pwron_mask = BIT(1), .channel = { [DPIO_CH0] = { .port = PORT_A }, } }, }; static const struct bxt_ddi_phy_info glk_ddi_phy_info[] = { [DPIO_PHY0] = { .dual_channel = false, .rcomp_phy = DPIO_PHY1, .pwron_mask = BIT(0), .reset_delay = 20, .channel = { [DPIO_CH0] = { .port = PORT_B }, } }, [DPIO_PHY1] = { .dual_channel = false, .rcomp_phy = -1, .pwron_mask = BIT(3), .reset_delay = 20, .channel = { [DPIO_CH0] = { .port = PORT_A }, } }, [DPIO_PHY2] = { .dual_channel = false, .rcomp_phy = DPIO_PHY1, .pwron_mask = BIT(1), .reset_delay = 20, .channel = { [DPIO_CH0] = { .port = PORT_C }, } }, }; static const struct bxt_ddi_phy_info * bxt_get_phy_list(struct drm_i915_private *dev_priv, int *count) { if (IS_GEMINILAKE(dev_priv)) { *count = ARRAY_SIZE(glk_ddi_phy_info); return glk_ddi_phy_info; } else { *count = ARRAY_SIZE(bxt_ddi_phy_info); return bxt_ddi_phy_info; } } static const struct bxt_ddi_phy_info * bxt_get_phy_info(struct drm_i915_private *dev_priv, enum dpio_phy phy) { int count; const struct bxt_ddi_phy_info *phy_list = bxt_get_phy_list(dev_priv, &count); return &phy_list[phy]; } void bxt_port_to_phy_channel(struct drm_i915_private *dev_priv, enum port port, enum dpio_phy *phy, enum dpio_channel *ch) { const struct bxt_ddi_phy_info *phy_info, *phys; int i, count; phys = bxt_get_phy_list(dev_priv, &count); for (i = 0; i < count; i++) { phy_info = &phys[i]; if (port == phy_info->channel[DPIO_CH0].port) { *phy = i; *ch = DPIO_CH0; return; } if (phy_info->dual_channel && port == phy_info->channel[DPIO_CH1].port) { *phy = i; *ch = DPIO_CH1; return; } } WARN(1, "PHY not found for PORT %c", port_name(port)); *phy = DPIO_PHY0; *ch = DPIO_CH0; } void bxt_ddi_phy_set_signal_level(struct drm_i915_private *dev_priv, enum port port, u32 margin, u32 scale, u32 enable, u32 deemphasis) { u32 val; enum dpio_phy phy; enum dpio_channel ch; bxt_port_to_phy_channel(dev_priv, port, &phy, &ch); /* * While we write to the group register to program all lanes at once we * can read only lane registers and we pick lanes 0/1 for that. */ val = I915_READ(BXT_PORT_PCS_DW10_LN01(phy, ch)); val &= ~(TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT); I915_WRITE(BXT_PORT_PCS_DW10_GRP(phy, ch), val); val = I915_READ(BXT_PORT_TX_DW2_LN0(phy, ch)); val &= ~(MARGIN_000 | UNIQ_TRANS_SCALE); val |= margin << MARGIN_000_SHIFT | scale << UNIQ_TRANS_SCALE_SHIFT; I915_WRITE(BXT_PORT_TX_DW2_GRP(phy, ch), val); val = I915_READ(BXT_PORT_TX_DW3_LN0(phy, ch)); val &= ~SCALE_DCOMP_METHOD; if (enable) val |= SCALE_DCOMP_METHOD; if ((val & UNIQUE_TRANGE_EN_METHOD) && !(val & SCALE_DCOMP_METHOD)) DRM_ERROR("Disabled scaling while ouniqetrangenmethod was set"); I915_WRITE(BXT_PORT_TX_DW3_GRP(phy, ch), val); val = I915_READ(BXT_PORT_TX_DW4_LN0(phy, ch)); val &= ~DE_EMPHASIS; val |= deemphasis << DEEMPH_SHIFT; I915_WRITE(BXT_PORT_TX_DW4_GRP(phy, ch), val); val = I915_READ(BXT_PORT_PCS_DW10_LN01(phy, ch)); val |= TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT; I915_WRITE(BXT_PORT_PCS_DW10_GRP(phy, ch), val); } bool bxt_ddi_phy_is_enabled(struct drm_i915_private *dev_priv, enum dpio_phy phy) { const struct bxt_ddi_phy_info *phy_info; phy_info = bxt_get_phy_info(dev_priv, phy); if (!(I915_READ(BXT_P_CR_GT_DISP_PWRON) & phy_info->pwron_mask)) return false; if ((I915_READ(BXT_PORT_CL1CM_DW0(phy)) & (PHY_POWER_GOOD | PHY_RESERVED)) != PHY_POWER_GOOD) { DRM_DEBUG_DRIVER("DDI PHY %d powered, but power hasn't settled\n", phy); return false; } if (!(I915_READ(BXT_PHY_CTL_FAMILY(phy)) & COMMON_RESET_DIS)) { DRM_DEBUG_DRIVER("DDI PHY %d powered, but still in reset\n", phy); return false; } return true; } static u32 bxt_get_grc(struct drm_i915_private *dev_priv, enum dpio_phy phy) { u32 val = I915_READ(BXT_PORT_REF_DW6(phy)); return (val & GRC_CODE_MASK) >> GRC_CODE_SHIFT; } static void bxt_phy_wait_grc_done(struct drm_i915_private *dev_priv, enum dpio_phy phy) { if (intel_wait_for_register(&dev_priv->uncore, BXT_PORT_REF_DW3(phy), GRC_DONE, GRC_DONE, 10)) DRM_ERROR("timeout waiting for PHY%d GRC\n", phy); } static void _bxt_ddi_phy_init(struct drm_i915_private *dev_priv, enum dpio_phy phy) { const struct bxt_ddi_phy_info *phy_info; u32 val; phy_info = bxt_get_phy_info(dev_priv, phy); if (bxt_ddi_phy_is_enabled(dev_priv, phy)) { /* Still read out the GRC value for state verification */ if (phy_info->rcomp_phy != -1) dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv, phy); if (bxt_ddi_phy_verify_state(dev_priv, phy)) { DRM_DEBUG_DRIVER("DDI PHY %d already enabled, " "won't reprogram it\n", phy); return; } DRM_DEBUG_DRIVER("DDI PHY %d enabled with invalid state, " "force reprogramming it\n", phy); } val = I915_READ(BXT_P_CR_GT_DISP_PWRON); val |= phy_info->pwron_mask; I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val); /* * The PHY registers start out inaccessible and respond to reads with * all 1s. Eventually they become accessible as they power up, then * the reserved bit will give the default 0. Poll on the reserved bit * becoming 0 to find when the PHY is accessible. * The flag should get set in 100us according to the HW team, but * use 1ms due to occasional timeouts observed with that. */ if (intel_wait_for_register_fw(&dev_priv->uncore, BXT_PORT_CL1CM_DW0(phy), PHY_RESERVED | PHY_POWER_GOOD, PHY_POWER_GOOD, 1)) DRM_ERROR("timeout during PHY%d power on\n", phy); /* Program PLL Rcomp code offset */ val = I915_READ(BXT_PORT_CL1CM_DW9(phy)); val &= ~IREF0RC_OFFSET_MASK; val |= 0xE4 << IREF0RC_OFFSET_SHIFT; I915_WRITE(BXT_PORT_CL1CM_DW9(phy), val); val = I915_READ(BXT_PORT_CL1CM_DW10(phy)); val &= ~IREF1RC_OFFSET_MASK; val |= 0xE4 << IREF1RC_OFFSET_SHIFT; I915_WRITE(BXT_PORT_CL1CM_DW10(phy), val); /* Program power gating */ val = I915_READ(BXT_PORT_CL1CM_DW28(phy)); val |= OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN | SUS_CLK_CONFIG; I915_WRITE(BXT_PORT_CL1CM_DW28(phy), val); if (phy_info->dual_channel) { val = I915_READ(BXT_PORT_CL2CM_DW6(phy)); val |= DW6_OLDO_DYN_PWR_DOWN_EN; I915_WRITE(BXT_PORT_CL2CM_DW6(phy), val); } if (phy_info->rcomp_phy != -1) { u32 grc_code; bxt_phy_wait_grc_done(dev_priv, phy_info->rcomp_phy); /* * PHY0 isn't connected to an RCOMP resistor so copy over * the corresponding calibrated value from PHY1, and disable * the automatic calibration on PHY0. */ val = dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv, phy_info->rcomp_phy); grc_code = val << GRC_CODE_FAST_SHIFT | val << GRC_CODE_SLOW_SHIFT | val; I915_WRITE(BXT_PORT_REF_DW6(phy), grc_code); val = I915_READ(BXT_PORT_REF_DW8(phy)); val |= GRC_DIS | GRC_RDY_OVRD; I915_WRITE(BXT_PORT_REF_DW8(phy), val); } if (phy_info->reset_delay) udelay(phy_info->reset_delay); val = I915_READ(BXT_PHY_CTL_FAMILY(phy)); val |= COMMON_RESET_DIS; I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val); } void bxt_ddi_phy_uninit(struct drm_i915_private *dev_priv, enum dpio_phy phy) { const struct bxt_ddi_phy_info *phy_info; u32 val; phy_info = bxt_get_phy_info(dev_priv, phy); val = I915_READ(BXT_PHY_CTL_FAMILY(phy)); val &= ~COMMON_RESET_DIS; I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val); val = I915_READ(BXT_P_CR_GT_DISP_PWRON); val &= ~phy_info->pwron_mask; I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val); } void bxt_ddi_phy_init(struct drm_i915_private *dev_priv, enum dpio_phy phy) { const struct bxt_ddi_phy_info *phy_info = bxt_get_phy_info(dev_priv, phy); enum dpio_phy rcomp_phy = phy_info->rcomp_phy; bool was_enabled; lockdep_assert_held(&dev_priv->power_domains.lock); was_enabled = true; if (rcomp_phy != -1) was_enabled = bxt_ddi_phy_is_enabled(dev_priv, rcomp_phy); /* * We need to copy the GRC calibration value from rcomp_phy, * so make sure it's powered up. */ if (!was_enabled) _bxt_ddi_phy_init(dev_priv, rcomp_phy); _bxt_ddi_phy_init(dev_priv, phy); if (!was_enabled) bxt_ddi_phy_uninit(dev_priv, rcomp_phy); } static bool __printf(6, 7) __phy_reg_verify_state(struct drm_i915_private *dev_priv, enum dpio_phy phy, i915_reg_t reg, u32 mask, u32 expected, const char *reg_fmt, ...) { struct va_format vaf; va_list args; u32 val; val = I915_READ(reg); if ((val & mask) == expected) return true; va_start(args, reg_fmt); vaf.fmt = reg_fmt; vaf.va = &args; DRM_DEBUG_DRIVER("DDI PHY %d reg %pV [%08x] state mismatch: " "current %08x, expected %08x (mask %08x)\n", phy, &vaf, reg.reg, val, (val & ~mask) | expected, mask); va_end(args); return false; } bool bxt_ddi_phy_verify_state(struct drm_i915_private *dev_priv, enum dpio_phy phy) { const struct bxt_ddi_phy_info *phy_info; u32 mask; bool ok; phy_info = bxt_get_phy_info(dev_priv, phy); #define _CHK(reg, mask, exp, fmt, ...) \ __phy_reg_verify_state(dev_priv, phy, reg, mask, exp, fmt, \ ## __VA_ARGS__) if (!bxt_ddi_phy_is_enabled(dev_priv, phy)) return false; ok = true; /* PLL Rcomp code offset */ ok &= _CHK(BXT_PORT_CL1CM_DW9(phy), IREF0RC_OFFSET_MASK, 0xe4 << IREF0RC_OFFSET_SHIFT, "BXT_PORT_CL1CM_DW9(%d)", phy); ok &= _CHK(BXT_PORT_CL1CM_DW10(phy), IREF1RC_OFFSET_MASK, 0xe4 << IREF1RC_OFFSET_SHIFT, "BXT_PORT_CL1CM_DW10(%d)", phy); /* Power gating */ mask = OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN | SUS_CLK_CONFIG; ok &= _CHK(BXT_PORT_CL1CM_DW28(phy), mask, mask, "BXT_PORT_CL1CM_DW28(%d)", phy); if (phy_info->dual_channel) ok &= _CHK(BXT_PORT_CL2CM_DW6(phy), DW6_OLDO_DYN_PWR_DOWN_EN, DW6_OLDO_DYN_PWR_DOWN_EN, "BXT_PORT_CL2CM_DW6(%d)", phy); if (phy_info->rcomp_phy != -1) { u32 grc_code = dev_priv->bxt_phy_grc; grc_code = grc_code << GRC_CODE_FAST_SHIFT | grc_code << GRC_CODE_SLOW_SHIFT | grc_code; mask = GRC_CODE_FAST_MASK | GRC_CODE_SLOW_MASK | GRC_CODE_NOM_MASK; ok &= _CHK(BXT_PORT_REF_DW6(phy), mask, grc_code, "BXT_PORT_REF_DW6(%d)", phy); mask = GRC_DIS | GRC_RDY_OVRD; ok &= _CHK(BXT_PORT_REF_DW8(phy), mask, mask, "BXT_PORT_REF_DW8(%d)", phy); } return ok; #undef _CHK } u8 bxt_ddi_phy_calc_lane_lat_optim_mask(u8 lane_count) { switch (lane_count) { case 1: return 0; case 2: return BIT(2) | BIT(0); case 4: return BIT(3) | BIT(2) | BIT(0); default: MISSING_CASE(lane_count); return 0; } } void bxt_ddi_phy_set_lane_optim_mask(struct intel_encoder *encoder, u8 lane_lat_optim_mask) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); enum port port = encoder->port; enum dpio_phy phy; enum dpio_channel ch; int lane; bxt_port_to_phy_channel(dev_priv, port, &phy, &ch); for (lane = 0; lane < 4; lane++) { u32 val = I915_READ(BXT_PORT_TX_DW14_LN(phy, ch, lane)); /* * Note that on CHV this flag is called UPAR, but has * the same function. */ val &= ~LATENCY_OPTIM; if (lane_lat_optim_mask & BIT(lane)) val |= LATENCY_OPTIM; I915_WRITE(BXT_PORT_TX_DW14_LN(phy, ch, lane), val); } } u8 bxt_ddi_phy_get_lane_lat_optim_mask(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); enum port port = encoder->port; enum dpio_phy phy; enum dpio_channel ch; int lane; u8 mask; bxt_port_to_phy_channel(dev_priv, port, &phy, &ch); mask = 0; for (lane = 0; lane < 4; lane++) { u32 val = I915_READ(BXT_PORT_TX_DW14_LN(phy, ch, lane)); if (val & LATENCY_OPTIM) mask |= BIT(lane); } return mask; } void chv_set_phy_signal_level(struct intel_encoder *encoder, u32 deemph_reg_value, u32 margin_reg_value, bool uniq_trans_scale) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_digital_port *dport = enc_to_dig_port(&encoder->base); struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); enum dpio_channel ch = vlv_dport_to_channel(dport); enum pipe pipe = intel_crtc->pipe; u32 val; int i; vlv_dpio_get(dev_priv); /* Clear calc init */ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch)); val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3); val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK); val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5; vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val); if (intel_crtc->config->lane_count > 2) { val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch)); val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3); val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK); val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5; vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val); } val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch)); val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK); val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000; vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val); if (intel_crtc->config->lane_count > 2) { val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch)); val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK); val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000; vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val); } /* Program swing deemph */ for (i = 0; i < intel_crtc->config->lane_count; i++) { val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i)); val &= ~DPIO_SWING_DEEMPH9P5_MASK; val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT; vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val); } /* Program swing margin */ for (i = 0; i < intel_crtc->config->lane_count; i++) { val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i)); val &= ~DPIO_SWING_MARGIN000_MASK; val |= margin_reg_value << DPIO_SWING_MARGIN000_SHIFT; /* * Supposedly this value shouldn't matter when unique transition * scale is disabled, but in fact it does matter. Let's just * always program the same value and hope it's OK. */ val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT); val |= 0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT; vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val); } /* * The document said it needs to set bit 27 for ch0 and bit 26 * for ch1. Might be a typo in the doc. * For now, for this unique transition scale selection, set bit * 27 for ch0 and ch1. */ for (i = 0; i < intel_crtc->config->lane_count; i++) { val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i)); if (uniq_trans_scale) val |= DPIO_TX_UNIQ_TRANS_SCALE_EN; else val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN; vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val); } /* Start swing calculation */ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch)); val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3; vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val); if (intel_crtc->config->lane_count > 2) { val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch)); val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3; vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val); } vlv_dpio_put(dev_priv); } void chv_data_lane_soft_reset(struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state, bool reset) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base)); struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); enum pipe pipe = crtc->pipe; u32 val; val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch)); if (reset) val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET); else val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET; vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val); if (crtc_state->lane_count > 2) { val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch)); if (reset) val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET); else val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET; vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val); } val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch)); val |= CHV_PCS_REQ_SOFTRESET_EN; if (reset) val &= ~DPIO_PCS_CLK_SOFT_RESET; else val |= DPIO_PCS_CLK_SOFT_RESET; vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val); if (crtc_state->lane_count > 2) { val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch)); val |= CHV_PCS_REQ_SOFTRESET_EN; if (reset) val &= ~DPIO_PCS_CLK_SOFT_RESET; else val |= DPIO_PCS_CLK_SOFT_RESET; vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val); } } void chv_phy_pre_pll_enable(struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state) { struct intel_digital_port *dport = enc_to_dig_port(&encoder->base); struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); enum dpio_channel ch = vlv_dport_to_channel(dport); enum pipe pipe = crtc->pipe; unsigned int lane_mask = intel_dp_unused_lane_mask(crtc_state->lane_count); u32 val; /* * Must trick the second common lane into life. * Otherwise we can't even access the PLL. */ if (ch == DPIO_CH0 && pipe == PIPE_B) dport->release_cl2_override = !chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, true); chv_phy_powergate_lanes(encoder, true, lane_mask); vlv_dpio_get(dev_priv); /* Assert data lane reset */ chv_data_lane_soft_reset(encoder, crtc_state, true); /* program left/right clock distribution */ if (pipe != PIPE_B) { val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0); val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK); if (ch == DPIO_CH0) val |= CHV_BUFLEFTENA1_FORCE; if (ch == DPIO_CH1) val |= CHV_BUFRIGHTENA1_FORCE; vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val); } else { val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1); val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK); if (ch == DPIO_CH0) val |= CHV_BUFLEFTENA2_FORCE; if (ch == DPIO_CH1) val |= CHV_BUFRIGHTENA2_FORCE; vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val); } /* program clock channel usage */ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch)); val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE; if (pipe != PIPE_B) val &= ~CHV_PCS_USEDCLKCHANNEL; else val |= CHV_PCS_USEDCLKCHANNEL; vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW8(ch), val); if (crtc_state->lane_count > 2) { val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW8(ch)); val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE; if (pipe != PIPE_B) val &= ~CHV_PCS_USEDCLKCHANNEL; else val |= CHV_PCS_USEDCLKCHANNEL; vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW8(ch), val); } /* * This a a bit weird since generally CL * matches the pipe, but here we need to * pick the CL based on the port. */ val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW19(ch)); if (pipe != PIPE_B) val &= ~CHV_CMN_USEDCLKCHANNEL; else val |= CHV_CMN_USEDCLKCHANNEL; vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val); vlv_dpio_put(dev_priv); } void chv_phy_pre_encoder_enable(struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state) { struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); struct intel_digital_port *dport = dp_to_dig_port(intel_dp); struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); enum dpio_channel ch = vlv_dport_to_channel(dport); enum pipe pipe = crtc->pipe; int data, i, stagger; u32 val; vlv_dpio_get(dev_priv); /* allow hardware to manage TX FIFO reset source */ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch)); val &= ~DPIO_LANEDESKEW_STRAP_OVRD; vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val); if (crtc_state->lane_count > 2) { val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch)); val &= ~DPIO_LANEDESKEW_STRAP_OVRD; vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val); } /* Program Tx lane latency optimal setting*/ for (i = 0; i < crtc_state->lane_count; i++) { /* Set the upar bit */ if (crtc_state->lane_count == 1) data = 0x0; else data = (i == 1) ? 0x0 : 0x1; vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i), data << DPIO_UPAR_SHIFT); } /* Data lane stagger programming */ if (crtc_state->port_clock > 270000) stagger = 0x18; else if (crtc_state->port_clock > 135000) stagger = 0xd; else if (crtc_state->port_clock > 67500) stagger = 0x7; else if (crtc_state->port_clock > 33750) stagger = 0x4; else stagger = 0x2; val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch)); val |= DPIO_TX2_STAGGER_MASK(0x1f); vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val); if (crtc_state->lane_count > 2) { val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch)); val |= DPIO_TX2_STAGGER_MASK(0x1f); vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val); } vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch), DPIO_LANESTAGGER_STRAP(stagger) | DPIO_LANESTAGGER_STRAP_OVRD | DPIO_TX1_STAGGER_MASK(0x1f) | DPIO_TX1_STAGGER_MULT(6) | DPIO_TX2_STAGGER_MULT(0)); if (crtc_state->lane_count > 2) { vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch), DPIO_LANESTAGGER_STRAP(stagger) | DPIO_LANESTAGGER_STRAP_OVRD | DPIO_TX1_STAGGER_MASK(0x1f) | DPIO_TX1_STAGGER_MULT(7) | DPIO_TX2_STAGGER_MULT(5)); } /* Deassert data lane reset */ chv_data_lane_soft_reset(encoder, crtc_state, false); vlv_dpio_put(dev_priv); } void chv_phy_release_cl2_override(struct intel_encoder *encoder) { struct intel_digital_port *dport = enc_to_dig_port(&encoder->base); struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); if (dport->release_cl2_override) { chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false); dport->release_cl2_override = false; } } void chv_phy_post_pll_disable(struct intel_encoder *encoder, const struct intel_crtc_state *old_crtc_state) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); enum pipe pipe = to_intel_crtc(old_crtc_state->base.crtc)->pipe; u32 val; vlv_dpio_get(dev_priv); /* disable left/right clock distribution */ if (pipe != PIPE_B) { val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0); val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK); vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val); } else { val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1); val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK); vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val); } vlv_dpio_put(dev_priv); /* * Leave the power down bit cleared for at least one * lane so that chv_powergate_phy_ch() will power * on something when the channel is otherwise unused. * When the port is off and the override is removed * the lanes power down anyway, so otherwise it doesn't * really matter what the state of power down bits is * after this. */ chv_phy_powergate_lanes(encoder, false, 0x0); } void vlv_set_phy_signal_level(struct intel_encoder *encoder, u32 demph_reg_value, u32 preemph_reg_value, u32 uniqtranscale_reg_value, u32 tx3_demph) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); struct intel_digital_port *dport = enc_to_dig_port(&encoder->base); enum dpio_channel port = vlv_dport_to_channel(dport); enum pipe pipe = intel_crtc->pipe; vlv_dpio_get(dev_priv); vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0x00000000); vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(port), demph_reg_value); vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(port), uniqtranscale_reg_value); vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(port), 0x0C782040); if (tx3_demph) vlv_dpio_write(dev_priv, pipe, VLV_TX3_DW4(port), tx3_demph); vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW11(port), 0x00030000); vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW9(port), preemph_reg_value); vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), DPIO_TX_OCALINIT_EN); vlv_dpio_put(dev_priv); } void vlv_phy_pre_pll_enable(struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state) { struct intel_digital_port *dport = enc_to_dig_port(&encoder->base); struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); enum dpio_channel port = vlv_dport_to_channel(dport); enum pipe pipe = crtc->pipe; /* Program Tx lane resets to default */ vlv_dpio_get(dev_priv); vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port), DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET); vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port), DPIO_PCS_CLK_CRI_RXEB_EIOS_EN | DPIO_PCS_CLK_CRI_RXDIGFILTSG_EN | (1<<DPIO_PCS_CLK_DATAWIDTH_SHIFT) | DPIO_PCS_CLK_SOFT_RESET); /* Fix up inter-pair skew failure */ vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW12(port), 0x00750f00); vlv_dpio_write(dev_priv, pipe, VLV_TX_DW11(port), 0x00001500); vlv_dpio_write(dev_priv, pipe, VLV_TX_DW14(port), 0x40400000); vlv_dpio_put(dev_priv); } void vlv_phy_pre_encoder_enable(struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state) { struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); struct intel_digital_port *dport = dp_to_dig_port(intel_dp); struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); enum dpio_channel port = vlv_dport_to_channel(dport); enum pipe pipe = crtc->pipe; u32 val; vlv_dpio_get(dev_priv); /* Enable clock channels for this port */ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(port)); val = 0; if (pipe) val |= (1<<21); else val &= ~(1<<21); val |= 0x001000c4; vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW8(port), val); /* Program lane clock */ vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW14(port), 0x00760018); vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW23(port), 0x00400888); vlv_dpio_put(dev_priv); } void vlv_phy_reset_lanes(struct intel_encoder *encoder, const struct intel_crtc_state *old_crtc_state) { struct intel_digital_port *dport = enc_to_dig_port(&encoder->base); struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc); enum dpio_channel port = vlv_dport_to_channel(dport); enum pipe pipe = crtc->pipe; vlv_dpio_get(dev_priv); vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port), 0x00000000); vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port), 0x00e00060); vlv_dpio_put(dev_priv); }