/* * Copyright © 2012 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. * * Authors: * Eugeni Dodonov * */ #include "i915_drv.h" #include "intel_drv.h" /* HDMI/DVI modes ignore everything but the last 2 items. So we share * them for both DP and FDI transports, allowing those ports to * automatically adapt to HDMI connections as well */ static const u32 hsw_ddi_translations_dp[] = { 0x00FFFFFF, 0x0006000E, /* DP parameters */ 0x00D75FFF, 0x0005000A, 0x00C30FFF, 0x00040006, 0x80AAAFFF, 0x000B0000, 0x00FFFFFF, 0x0005000A, 0x00D75FFF, 0x000C0004, 0x80C30FFF, 0x000B0000, 0x00FFFFFF, 0x00040006, 0x80D75FFF, 0x000B0000, 0x00FFFFFF, 0x00040006 /* HDMI parameters */ }; static const u32 hsw_ddi_translations_fdi[] = { 0x00FFFFFF, 0x0007000E, /* FDI parameters */ 0x00D75FFF, 0x000F000A, 0x00C30FFF, 0x00060006, 0x00AAAFFF, 0x001E0000, 0x00FFFFFF, 0x000F000A, 0x00D75FFF, 0x00160004, 0x00C30FFF, 0x001E0000, 0x00FFFFFF, 0x00060006, 0x00D75FFF, 0x001E0000, 0x00FFFFFF, 0x00040006 /* HDMI parameters */ }; static enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder) { int type = intel_encoder->type; if (type == INTEL_OUTPUT_HDMI) { struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&intel_encoder->base); return intel_hdmi->ddi_port; } else if (type == INTEL_OUTPUT_ANALOG) { return PORT_E; } else { DRM_ERROR("Invalid DDI encoder type %d\n", type); BUG(); } } /* On Haswell, DDI port buffers must be programmed with correct values * in advance. The buffer values are different for FDI and DP modes, * but the HDMI/DVI fields are shared among those. So we program the DDI * in either FDI or DP modes only, as HDMI connections will work with both * of those */ void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port, bool use_fdi_mode) { struct drm_i915_private *dev_priv = dev->dev_private; u32 reg; int i; const u32 *ddi_translations = ((use_fdi_mode) ? hsw_ddi_translations_fdi : hsw_ddi_translations_dp); DRM_DEBUG_DRIVER("Initializing DDI buffers for port %c in %s mode\n", port_name(port), use_fdi_mode ? "FDI" : "DP"); WARN((use_fdi_mode && (port != PORT_E)), "Programming port %c in FDI mode, this probably will not work.\n", port_name(port)); for (i=0, reg=DDI_BUF_TRANS(port); i < ARRAY_SIZE(hsw_ddi_translations_fdi); i++) { I915_WRITE(reg, ddi_translations[i]); reg += 4; } } /* Program DDI buffers translations for DP. By default, program ports A-D in DP * mode and port E for FDI. */ void intel_prepare_ddi(struct drm_device *dev) { int port; if (IS_HASWELL(dev)) { for (port = PORT_A; port < PORT_E; port++) intel_prepare_ddi_buffers(dev, port, false); /* DDI E is the suggested one to work in FDI mode, so program is as such by * default. It will have to be re-programmed in case a digital DP output * will be detected on it */ intel_prepare_ddi_buffers(dev, PORT_E, true); } } static const long hsw_ddi_buf_ctl_values[] = { DDI_BUF_EMP_400MV_0DB_HSW, DDI_BUF_EMP_400MV_3_5DB_HSW, DDI_BUF_EMP_400MV_6DB_HSW, DDI_BUF_EMP_400MV_9_5DB_HSW, DDI_BUF_EMP_600MV_0DB_HSW, DDI_BUF_EMP_600MV_3_5DB_HSW, DDI_BUF_EMP_600MV_6DB_HSW, DDI_BUF_EMP_800MV_0DB_HSW, DDI_BUF_EMP_800MV_3_5DB_HSW }; /* Starting with Haswell, different DDI ports can work in FDI mode for * connection to the PCH-located connectors. For this, it is necessary to train * both the DDI port and PCH receiver for the desired DDI buffer settings. * * The recommended port to work in FDI mode is DDI E, which we use here. Also, * please note that when FDI mode is active on DDI E, it shares 2 lines with * DDI A (which is used for eDP) */ void hsw_fdi_link_train(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); int pipe = intel_crtc->pipe; u32 reg, temp, i; /* Start the training iterating through available voltages and emphasis */ for (i=0; i < ARRAY_SIZE(hsw_ddi_buf_ctl_values); i++) { /* Configure DP_TP_CTL with auto-training */ I915_WRITE(DP_TP_CTL(PORT_E), DP_TP_CTL_FDI_AUTOTRAIN | DP_TP_CTL_ENHANCED_FRAME_ENABLE | DP_TP_CTL_LINK_TRAIN_PAT1 | DP_TP_CTL_ENABLE); /* Configure and enable DDI_BUF_CTL for DDI E with next voltage */ temp = I915_READ(DDI_BUF_CTL(PORT_E)); temp = (temp & ~DDI_BUF_EMP_MASK); I915_WRITE(DDI_BUF_CTL(PORT_E), temp | DDI_BUF_CTL_ENABLE | DDI_PORT_WIDTH_X2 | hsw_ddi_buf_ctl_values[i]); udelay(600); /* We need to program FDI_RX_MISC with the default TP1 to TP2 * values before enabling the receiver, and configure the delay * for the FDI timing generator to 90h. Luckily, all the other * bits are supposed to be zeroed, so we can write those values * directly. */ I915_WRITE(FDI_RX_MISC(pipe), FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90); /* Enable CPU FDI Receiver with auto-training */ reg = FDI_RX_CTL(pipe); I915_WRITE(reg, I915_READ(reg) | FDI_LINK_TRAIN_AUTO | FDI_RX_ENABLE | FDI_LINK_TRAIN_PATTERN_1_CPT | FDI_RX_ENHANCE_FRAME_ENABLE | FDI_PORT_WIDTH_2X_LPT | FDI_RX_PLL_ENABLE); POSTING_READ(reg); udelay(100); temp = I915_READ(DP_TP_STATUS(PORT_E)); if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) { DRM_DEBUG_DRIVER("BUF_CTL training done on %d step\n", i); /* Enable normal pixel sending for FDI */ I915_WRITE(DP_TP_CTL(PORT_E), DP_TP_CTL_FDI_AUTOTRAIN | DP_TP_CTL_LINK_TRAIN_NORMAL | DP_TP_CTL_ENHANCED_FRAME_ENABLE | DP_TP_CTL_ENABLE); break; } else { DRM_ERROR("Error training BUF_CTL %d\n", i); /* Disable DP_TP_CTL and FDI_RX_CTL) and retry */ I915_WRITE(DP_TP_CTL(PORT_E), I915_READ(DP_TP_CTL(PORT_E)) & ~DP_TP_CTL_ENABLE); I915_WRITE(FDI_RX_CTL(pipe), I915_READ(FDI_RX_CTL(pipe)) & ~FDI_RX_PLL_ENABLE); continue; } } DRM_DEBUG_KMS("FDI train done.\n"); } /* For DDI connections, it is possible to support different outputs over the * same DDI port, such as HDMI or DP or even VGA via FDI. So we don't know by * the time the output is detected what exactly is on the other end of it. This * function aims at providing support for this detection and proper output * configuration. */ void intel_ddi_init(struct drm_device *dev, enum port port) { /* For now, we don't do any proper output detection and assume that we * handle HDMI only */ switch(port){ case PORT_A: /* We don't handle eDP and DP yet */ DRM_DEBUG_DRIVER("Found digital output on DDI port A\n"); break; /* Assume that the ports B, C and D are working in HDMI mode for now */ case PORT_B: case PORT_C: case PORT_D: intel_hdmi_init(dev, DDI_BUF_CTL(port), port); break; default: DRM_DEBUG_DRIVER("No handlers defined for port %d, skipping DDI initialization\n", port); break; } } /* WRPLL clock dividers */ struct wrpll_tmds_clock { u32 clock; u16 p; /* Post divider */ u16 n2; /* Feedback divider */ u16 r2; /* Reference divider */ }; /* Table of matching values for WRPLL clocks programming for each frequency. * The code assumes this table is sorted. */ static const struct wrpll_tmds_clock wrpll_tmds_clock_table[] = { {19750, 38, 25, 18}, {20000, 48, 32, 18}, {21000, 36, 21, 15}, {21912, 42, 29, 17}, {22000, 36, 22, 15}, {23000, 36, 23, 15}, {23500, 40, 40, 23}, {23750, 26, 16, 14}, {24000, 36, 24, 15}, {25000, 36, 25, 15}, {25175, 26, 40, 33}, {25200, 30, 21, 15}, {26000, 36, 26, 15}, {27000, 30, 21, 14}, {27027, 18, 100, 111}, {27500, 30, 29, 19}, {28000, 34, 30, 17}, {28320, 26, 30, 22}, {28322, 32, 42, 25}, {28750, 24, 23, 18}, {29000, 30, 29, 18}, {29750, 32, 30, 17}, {30000, 30, 25, 15}, {30750, 30, 41, 24}, {31000, 30, 31, 18}, {31500, 30, 28, 16}, {32000, 30, 32, 18}, {32500, 28, 32, 19}, {33000, 24, 22, 15}, {34000, 28, 30, 17}, {35000, 26, 32, 19}, {35500, 24, 30, 19}, {36000, 26, 26, 15}, {36750, 26, 46, 26}, {37000, 24, 23, 14}, {37762, 22, 40, 26}, {37800, 20, 21, 15}, {38000, 24, 27, 16}, {38250, 24, 34, 20}, {39000, 24, 26, 15}, {40000, 24, 32, 18}, {40500, 20, 21, 14}, {40541, 22, 147, 89}, {40750, 18, 19, 14}, {41000, 16, 17, 14}, {41500, 22, 44, 26}, {41540, 22, 44, 26}, {42000, 18, 21, 15}, {42500, 22, 45, 26}, {43000, 20, 43, 27}, {43163, 20, 24, 15}, {44000, 18, 22, 15}, {44900, 20, 108, 65}, {45000, 20, 25, 15}, {45250, 20, 52, 31}, {46000, 18, 23, 15}, {46750, 20, 45, 26}, {47000, 20, 40, 23}, {48000, 18, 24, 15}, {49000, 18, 49, 30}, {49500, 16, 22, 15}, {50000, 18, 25, 15}, {50500, 18, 32, 19}, {51000, 18, 34, 20}, {52000, 18, 26, 15}, {52406, 14, 34, 25}, {53000, 16, 22, 14}, {54000, 16, 24, 15}, {54054, 16, 173, 108}, {54500, 14, 24, 17}, {55000, 12, 22, 18}, {56000, 14, 45, 31}, {56250, 16, 25, 15}, {56750, 14, 25, 17}, {57000, 16, 27, 16}, {58000, 16, 43, 25}, {58250, 16, 38, 22}, {58750, 16, 40, 23}, {59000, 14, 26, 17}, {59341, 14, 40, 26}, {59400, 16, 44, 25}, {60000, 16, 32, 18}, {60500, 12, 39, 29}, {61000, 14, 49, 31}, {62000, 14, 37, 23}, {62250, 14, 42, 26}, {63000, 12, 21, 15}, {63500, 14, 28, 17}, {64000, 12, 27, 19}, {65000, 14, 32, 19}, {65250, 12, 29, 20}, {65500, 12, 32, 22}, {66000, 12, 22, 15}, {66667, 14, 38, 22}, {66750, 10, 21, 17}, {67000, 14, 33, 19}, {67750, 14, 58, 33}, {68000, 14, 30, 17}, {68179, 14, 46, 26}, {68250, 14, 46, 26}, {69000, 12, 23, 15}, {70000, 12, 28, 18}, {71000, 12, 30, 19}, {72000, 12, 24, 15}, {73000, 10, 23, 17}, {74000, 12, 23, 14}, {74176, 8, 100, 91}, {74250, 10, 22, 16}, {74481, 12, 43, 26}, {74500, 10, 29, 21}, {75000, 12, 25, 15}, {75250, 10, 39, 28}, {76000, 12, 27, 16}, {77000, 12, 53, 31}, {78000, 12, 26, 15}, {78750, 12, 28, 16}, {79000, 10, 38, 26}, {79500, 10, 28, 19}, {80000, 12, 32, 18}, {81000, 10, 21, 14}, {81081, 6, 100, 111}, {81624, 8, 29, 24}, {82000, 8, 17, 14}, {83000, 10, 40, 26}, {83950, 10, 28, 18}, {84000, 10, 28, 18}, {84750, 6, 16, 17}, {85000, 6, 17, 18}, {85250, 10, 30, 19}, {85750, 10, 27, 17}, {86000, 10, 43, 27}, {87000, 10, 29, 18}, {88000, 10, 44, 27}, {88500, 10, 41, 25}, {89000, 10, 28, 17}, {89012, 6, 90, 91}, {89100, 10, 33, 20}, {90000, 10, 25, 15}, {91000, 10, 32, 19}, {92000, 10, 46, 27}, {93000, 10, 31, 18}, {94000, 10, 40, 23}, {94500, 10, 28, 16}, {95000, 10, 44, 25}, {95654, 10, 39, 22}, {95750, 10, 39, 22}, {96000, 10, 32, 18}, {97000, 8, 23, 16}, {97750, 8, 42, 29}, {98000, 8, 45, 31}, {99000, 8, 22, 15}, {99750, 8, 34, 23}, {100000, 6, 20, 18}, {100500, 6, 19, 17}, {101000, 6, 37, 33}, {101250, 8, 21, 14}, {102000, 6, 17, 15}, {102250, 6, 25, 22}, {103000, 8, 29, 19}, {104000, 8, 37, 24}, {105000, 8, 28, 18}, {106000, 8, 22, 14}, {107000, 8, 46, 29}, {107214, 8, 27, 17}, {108000, 8, 24, 15}, {108108, 8, 173, 108}, {109000, 6, 23, 19}, {110000, 6, 22, 18}, {110013, 6, 22, 18}, {110250, 8, 49, 30}, {110500, 8, 36, 22}, {111000, 8, 23, 14}, {111264, 8, 150, 91}, {111375, 8, 33, 20}, {112000, 8, 63, 38}, {112500, 8, 25, 15}, {113100, 8, 57, 34}, {113309, 8, 42, 25}, {114000, 8, 27, 16}, {115000, 6, 23, 18}, {116000, 8, 43, 25}, {117000, 8, 26, 15}, {117500, 8, 40, 23}, {118000, 6, 38, 29}, {119000, 8, 30, 17}, {119500, 8, 46, 26}, {119651, 8, 39, 22}, {120000, 8, 32, 18}, {121000, 6, 39, 29}, {121250, 6, 31, 23}, {121750, 6, 23, 17}, {122000, 6, 42, 31}, {122614, 6, 30, 22}, {123000, 6, 41, 30}, {123379, 6, 37, 27}, {124000, 6, 51, 37}, {125000, 6, 25, 18}, {125250, 4, 13, 14}, {125750, 4, 27, 29}, {126000, 6, 21, 15}, {127000, 6, 24, 17}, {127250, 6, 41, 29}, {128000, 6, 27, 19}, {129000, 6, 43, 30}, {129859, 4, 25, 26}, {130000, 6, 26, 18}, {130250, 6, 42, 29}, {131000, 6, 32, 22}, {131500, 6, 38, 26}, {131850, 6, 41, 28}, {132000, 6, 22, 15}, {132750, 6, 28, 19}, {133000, 6, 34, 23}, {133330, 6, 37, 25}, {134000, 6, 61, 41}, {135000, 6, 21, 14}, {135250, 6, 167, 111}, {136000, 6, 62, 41}, {137000, 6, 35, 23}, {138000, 6, 23, 15}, {138500, 6, 40, 26}, {138750, 6, 37, 24}, {139000, 6, 34, 22}, {139050, 6, 34, 22}, {139054, 6, 34, 22}, {140000, 6, 28, 18}, {141000, 6, 36, 23}, {141500, 6, 22, 14}, {142000, 6, 30, 19}, {143000, 6, 27, 17}, {143472, 4, 17, 16}, {144000, 6, 24, 15}, {145000, 6, 29, 18}, {146000, 6, 47, 29}, {146250, 6, 26, 16}, {147000, 6, 49, 30}, {147891, 6, 23, 14}, {148000, 6, 23, 14}, {148250, 6, 28, 17}, {148352, 4, 100, 91}, {148500, 6, 33, 20}, {149000, 6, 48, 29}, {150000, 6, 25, 15}, {151000, 4, 19, 17}, {152000, 6, 27, 16}, {152280, 6, 44, 26}, {153000, 6, 34, 20}, {154000, 6, 53, 31}, {155000, 6, 31, 18}, {155250, 6, 50, 29}, {155750, 6, 45, 26}, {156000, 6, 26, 15}, {157000, 6, 61, 35}, {157500, 6, 28, 16}, {158000, 6, 65, 37}, {158250, 6, 44, 25}, {159000, 6, 53, 30}, {159500, 6, 39, 22}, {160000, 6, 32, 18}, {161000, 4, 31, 26}, {162000, 4, 18, 15}, {162162, 4, 131, 109}, {162500, 4, 53, 44}, {163000, 4, 29, 24}, {164000, 4, 17, 14}, {165000, 4, 22, 18}, {166000, 4, 32, 26}, {167000, 4, 26, 21}, {168000, 4, 46, 37}, {169000, 4, 104, 83}, {169128, 4, 64, 51}, {169500, 4, 39, 31}, {170000, 4, 34, 27}, {171000, 4, 19, 15}, {172000, 4, 51, 40}, {172750, 4, 32, 25}, {172800, 4, 32, 25}, {173000, 4, 41, 32}, {174000, 4, 49, 38}, {174787, 4, 22, 17}, {175000, 4, 35, 27}, {176000, 4, 30, 23}, {177000, 4, 38, 29}, {178000, 4, 29, 22}, {178500, 4, 37, 28}, {179000, 4, 53, 40}, {179500, 4, 73, 55}, {180000, 4, 20, 15}, {181000, 4, 55, 41}, {182000, 4, 31, 23}, {183000, 4, 42, 31}, {184000, 4, 30, 22}, {184750, 4, 26, 19}, {185000, 4, 37, 27}, {186000, 4, 51, 37}, {187000, 4, 36, 26}, {188000, 4, 32, 23}, {189000, 4, 21, 15}, {190000, 4, 38, 27}, {190960, 4, 41, 29}, {191000, 4, 41, 29}, {192000, 4, 27, 19}, {192250, 4, 37, 26}, {193000, 4, 20, 14}, {193250, 4, 53, 37}, {194000, 4, 23, 16}, {194208, 4, 23, 16}, {195000, 4, 26, 18}, {196000, 4, 45, 31}, {197000, 4, 35, 24}, {197750, 4, 41, 28}, {198000, 4, 22, 15}, {198500, 4, 25, 17}, {199000, 4, 28, 19}, {200000, 4, 37, 25}, {201000, 4, 61, 41}, {202000, 4, 112, 75}, {202500, 4, 21, 14}, {203000, 4, 146, 97}, {204000, 4, 62, 41}, {204750, 4, 44, 29}, {205000, 4, 38, 25}, {206000, 4, 29, 19}, {207000, 4, 23, 15}, {207500, 4, 40, 26}, {208000, 4, 37, 24}, {208900, 4, 48, 31}, {209000, 4, 48, 31}, {209250, 4, 31, 20}, {210000, 4, 28, 18}, {211000, 4, 25, 16}, {212000, 4, 22, 14}, {213000, 4, 30, 19}, {213750, 4, 38, 24}, {214000, 4, 46, 29}, {214750, 4, 35, 22}, {215000, 4, 43, 27}, {216000, 4, 24, 15}, {217000, 4, 37, 23}, {218000, 4, 42, 26}, {218250, 4, 42, 26}, {218750, 4, 34, 21}, {219000, 4, 47, 29}, {220000, 4, 44, 27}, {220640, 4, 49, 30}, {220750, 4, 36, 22}, {221000, 4, 36, 22}, {222000, 4, 23, 14}, {222525, 4, 28, 17}, {222750, 4, 33, 20}, {227000, 4, 37, 22}, {230250, 4, 29, 17}, {233500, 4, 38, 22}, {235000, 4, 40, 23}, {238000, 4, 30, 17}, {241500, 2, 17, 19}, {245250, 2, 20, 22}, {247750, 2, 22, 24}, {253250, 2, 15, 16}, {256250, 2, 18, 19}, {262500, 2, 31, 32}, {267250, 2, 66, 67}, {268500, 2, 94, 95}, {270000, 2, 14, 14}, {272500, 2, 77, 76}, {273750, 2, 57, 56}, {280750, 2, 24, 23}, {281250, 2, 23, 22}, {286000, 2, 17, 16}, {291750, 2, 26, 24}, {296703, 2, 56, 51}, {297000, 2, 22, 20}, {298000, 2, 21, 19}, }; void intel_ddi_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { struct drm_crtc *crtc = encoder->crtc; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder); int port = intel_hdmi->ddi_port; int pipe = intel_crtc->pipe; /* On Haswell, we need to enable the clocks and prepare DDI function to * work in HDMI mode for this pipe. */ DRM_DEBUG_KMS("Preparing HDMI DDI mode for Haswell on port %c, pipe %c\n", port_name(port), pipe_name(pipe)); if (intel_hdmi->has_audio) { /* Proper support for digital audio needs a new logic and a new set * of registers, so we leave it for future patch bombing. */ DRM_DEBUG_DRIVER("HDMI audio on pipe %c on DDI\n", pipe_name(intel_crtc->pipe)); /* write eld */ DRM_DEBUG_DRIVER("HDMI audio: write eld information\n"); intel_write_eld(encoder, adjusted_mode); } intel_hdmi->set_infoframes(encoder, adjusted_mode); } static struct intel_encoder * intel_ddi_get_crtc_encoder(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_encoder *intel_encoder, *ret = NULL; int num_encoders = 0; for_each_encoder_on_crtc(dev, crtc, intel_encoder) { ret = intel_encoder; num_encoders++; } if (num_encoders != 1) WARN(1, "%d encoders on crtc for pipe %d\n", num_encoders, intel_crtc->pipe); BUG_ON(ret == NULL); return ret; } void intel_ddi_put_crtc_pll(struct drm_crtc *crtc) { struct drm_i915_private *dev_priv = crtc->dev->dev_private; struct intel_ddi_plls *plls = &dev_priv->ddi_plls; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); uint32_t val; switch (intel_crtc->ddi_pll_sel) { case PORT_CLK_SEL_SPLL: plls->spll_refcount--; if (plls->spll_refcount == 0) { DRM_DEBUG_KMS("Disabling SPLL\n"); val = I915_READ(SPLL_CTL); WARN_ON(!(val & SPLL_PLL_ENABLE)); I915_WRITE(SPLL_CTL, val & ~SPLL_PLL_ENABLE); POSTING_READ(SPLL_CTL); } break; case PORT_CLK_SEL_WRPLL1: plls->wrpll1_refcount--; if (plls->wrpll1_refcount == 0) { DRM_DEBUG_KMS("Disabling WRPLL 1\n"); val = I915_READ(WRPLL_CTL1); WARN_ON(!(val & WRPLL_PLL_ENABLE)); I915_WRITE(WRPLL_CTL1, val & ~WRPLL_PLL_ENABLE); POSTING_READ(WRPLL_CTL1); } break; case PORT_CLK_SEL_WRPLL2: plls->wrpll2_refcount--; if (plls->wrpll2_refcount == 0) { DRM_DEBUG_KMS("Disabling WRPLL 2\n"); val = I915_READ(WRPLL_CTL2); WARN_ON(!(val & WRPLL_PLL_ENABLE)); I915_WRITE(WRPLL_CTL2, val & ~WRPLL_PLL_ENABLE); POSTING_READ(WRPLL_CTL2); } break; } WARN(plls->spll_refcount < 0, "Invalid SPLL refcount\n"); WARN(plls->wrpll1_refcount < 0, "Invalid WRPLL1 refcount\n"); WARN(plls->wrpll2_refcount < 0, "Invalid WRPLL2 refcount\n"); intel_crtc->ddi_pll_sel = PORT_CLK_SEL_NONE; } static void intel_ddi_calculate_wrpll(int clock, int *p, int *n2, int *r2) { u32 i; for (i = 0; i < ARRAY_SIZE(wrpll_tmds_clock_table); i++) if (clock <= wrpll_tmds_clock_table[i].clock) break; if (i == ARRAY_SIZE(wrpll_tmds_clock_table)) i--; *p = wrpll_tmds_clock_table[i].p; *n2 = wrpll_tmds_clock_table[i].n2; *r2 = wrpll_tmds_clock_table[i].r2; if (wrpll_tmds_clock_table[i].clock != clock) DRM_INFO("WRPLL: using settings for %dKHz on %dKHz mode\n", wrpll_tmds_clock_table[i].clock, clock); DRM_DEBUG_KMS("WRPLL: %dKHz refresh rate with p=%d, n2=%d r2=%d\n", clock, *p, *n2, *r2); } bool intel_ddi_pll_mode_set(struct drm_crtc *crtc, int clock) { struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc); struct drm_i915_private *dev_priv = crtc->dev->dev_private; struct intel_ddi_plls *plls = &dev_priv->ddi_plls; int type = intel_encoder->type; enum pipe pipe = intel_crtc->pipe; uint32_t reg, val; /* TODO: reuse PLLs when possible (compare values) */ intel_ddi_put_crtc_pll(crtc); if (type == INTEL_OUTPUT_HDMI) { int p, n2, r2; if (plls->wrpll1_refcount == 0) { DRM_DEBUG_KMS("Using WRPLL 1 on pipe %c\n", pipe_name(pipe)); plls->wrpll1_refcount++; reg = WRPLL_CTL1; intel_crtc->ddi_pll_sel = PORT_CLK_SEL_WRPLL1; } else if (plls->wrpll2_refcount == 0) { DRM_DEBUG_KMS("Using WRPLL 2 on pipe %c\n", pipe_name(pipe)); plls->wrpll2_refcount++; reg = WRPLL_CTL2; intel_crtc->ddi_pll_sel = PORT_CLK_SEL_WRPLL2; } else { DRM_ERROR("No WRPLLs available!\n"); return false; } WARN(I915_READ(reg) & WRPLL_PLL_ENABLE, "WRPLL already enabled\n"); intel_ddi_calculate_wrpll(clock, &p, &n2, &r2); val = WRPLL_PLL_ENABLE | WRPLL_PLL_SELECT_LCPLL_2700 | WRPLL_DIVIDER_REFERENCE(r2) | WRPLL_DIVIDER_FEEDBACK(n2) | WRPLL_DIVIDER_POST(p); } else if (type == INTEL_OUTPUT_ANALOG) { if (plls->spll_refcount == 0) { DRM_DEBUG_KMS("Using SPLL on pipe %c\n", pipe_name(pipe)); plls->spll_refcount++; reg = SPLL_CTL; intel_crtc->ddi_pll_sel = PORT_CLK_SEL_SPLL; } WARN(I915_READ(reg) & SPLL_PLL_ENABLE, "SPLL already enabled\n"); val = SPLL_PLL_ENABLE | SPLL_PLL_FREQ_1350MHz | SPLL_PLL_SSC; } else { WARN(1, "Invalid DDI encoder type %d\n", type); return false; } I915_WRITE(reg, val); udelay(20); return true; } void intel_ddi_enable_pipe_func(struct drm_crtc *crtc) { struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc); struct drm_i915_private *dev_priv = crtc->dev->dev_private; enum pipe pipe = intel_crtc->pipe; uint32_t temp; /* Enable PIPE_DDI_FUNC_CTL for the pipe to work in HDMI mode */ temp = PIPE_DDI_FUNC_ENABLE; switch (intel_crtc->bpp) { case 18: temp |= PIPE_DDI_BPC_6; break; case 24: temp |= PIPE_DDI_BPC_8; break; case 30: temp |= PIPE_DDI_BPC_10; break; case 36: temp |= PIPE_DDI_BPC_12; break; default: WARN(1, "%d bpp unsupported by pipe DDI function\n", intel_crtc->bpp); } if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC) temp |= PIPE_DDI_PVSYNC; if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC) temp |= PIPE_DDI_PHSYNC; if (intel_encoder->type == INTEL_OUTPUT_HDMI) { struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&intel_encoder->base); if (intel_hdmi->has_hdmi_sink) temp |= PIPE_DDI_MODE_SELECT_HDMI; else temp |= PIPE_DDI_MODE_SELECT_DVI; temp |= PIPE_DDI_SELECT_PORT(intel_hdmi->ddi_port); } else if (intel_encoder->type == INTEL_OUTPUT_ANALOG) { temp |= PIPE_DDI_MODE_SELECT_FDI; temp |= PIPE_DDI_SELECT_PORT(PORT_E); } else { WARN(1, "Invalid encoder type %d for pipe %d\n", intel_encoder->type, pipe); } I915_WRITE(DDI_FUNC_CTL(pipe), temp); } void intel_ddi_disable_pipe_func(struct drm_i915_private *dev_priv, enum pipe pipe) { uint32_t reg = DDI_FUNC_CTL(pipe); uint32_t val = I915_READ(reg); val &= ~(PIPE_DDI_FUNC_ENABLE | PIPE_DDI_PORT_MASK); val |= PIPE_DDI_PORT_NONE; I915_WRITE(reg, val); } bool intel_ddi_get_hw_state(struct intel_encoder *encoder, enum pipe *pipe) { struct drm_device *dev = encoder->base.dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base); u32 tmp; int i; tmp = I915_READ(DDI_BUF_CTL(intel_hdmi->ddi_port)); if (!(tmp & DDI_BUF_CTL_ENABLE)) return false; for_each_pipe(i) { tmp = I915_READ(DDI_FUNC_CTL(i)); if ((tmp & PIPE_DDI_PORT_MASK) == PIPE_DDI_SELECT_PORT(intel_hdmi->ddi_port)) { *pipe = i; return true; } } DRM_DEBUG_KMS("No pipe for ddi port %i found\n", intel_hdmi->ddi_port); return true; } static uint32_t intel_ddi_get_crtc_pll(struct drm_i915_private *dev_priv, enum pipe pipe) { uint32_t temp, ret; enum port port; int i; temp = I915_READ(DDI_FUNC_CTL(pipe)); temp &= PIPE_DDI_PORT_MASK; for (i = PORT_A; i <= PORT_E; i++) if (temp == PIPE_DDI_SELECT_PORT(i)) port = i; ret = I915_READ(PORT_CLK_SEL(port)); DRM_DEBUG_KMS("Pipe %c connected to port %c using clock 0x%08x\n", pipe_name(pipe), port_name(port), ret); return ret; } void intel_ddi_setup_hw_pll_state(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; enum pipe pipe; struct intel_crtc *intel_crtc; for_each_pipe(pipe) { intel_crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]); if (!intel_crtc->active) continue; intel_crtc->ddi_pll_sel = intel_ddi_get_crtc_pll(dev_priv, pipe); switch (intel_crtc->ddi_pll_sel) { case PORT_CLK_SEL_SPLL: dev_priv->ddi_plls.spll_refcount++; break; case PORT_CLK_SEL_WRPLL1: dev_priv->ddi_plls.wrpll1_refcount++; break; case PORT_CLK_SEL_WRPLL2: dev_priv->ddi_plls.wrpll2_refcount++; break; } } } void intel_ddi_enable_pipe_clock(struct intel_crtc *intel_crtc) { struct drm_crtc *crtc = &intel_crtc->base; struct drm_i915_private *dev_priv = crtc->dev->dev_private; struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc); enum port port = intel_ddi_get_encoder_port(intel_encoder); I915_WRITE(PIPE_CLK_SEL(intel_crtc->pipe), PIPE_CLK_SEL_PORT(port)); } void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc) { struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private; I915_WRITE(PIPE_CLK_SEL(intel_crtc->pipe), PIPE_CLK_SEL_DISABLED); } void intel_ddi_pre_enable(struct intel_encoder *intel_encoder) { struct drm_crtc *crtc = intel_encoder->base.crtc; struct drm_i915_private *dev_priv = crtc->dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); enum port port = intel_ddi_get_encoder_port(intel_encoder); WARN_ON(intel_crtc->ddi_pll_sel == PORT_CLK_SEL_NONE); I915_WRITE(PORT_CLK_SEL(port), intel_crtc->ddi_pll_sel); } static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv, enum port port) { uint32_t reg = DDI_BUF_CTL(port); int i; for (i = 0; i < 8; i++) { udelay(1); if (I915_READ(reg) & DDI_BUF_IS_IDLE) return; } DRM_ERROR("Timeout waiting for DDI BUF %c idle bit\n", port_name(port)); } void intel_ddi_post_disable(struct intel_encoder *intel_encoder) { struct drm_encoder *encoder = &intel_encoder->base; struct drm_i915_private *dev_priv = encoder->dev->dev_private; enum port port = intel_ddi_get_encoder_port(intel_encoder); uint32_t val; val = I915_READ(DDI_BUF_CTL(port)); if (val & DDI_BUF_CTL_ENABLE) { val &= ~DDI_BUF_CTL_ENABLE; I915_WRITE(DDI_BUF_CTL(port), val); intel_wait_ddi_buf_idle(dev_priv, port); } I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE); } void intel_enable_ddi(struct intel_encoder *encoder) { struct drm_device *dev = encoder->base.dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base); int port = intel_hdmi->ddi_port; /* Enable DDI_BUF_CTL. In HDMI/DVI mode, the port width, * and swing/emphasis values are ignored so nothing special needs * to be done besides enabling the port. */ I915_WRITE(DDI_BUF_CTL(port), DDI_BUF_CTL_ENABLE); } void intel_disable_ddi(struct intel_encoder *encoder) { /* This will be needed in the future, so leave it here for now */ } static int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv) { if (I915_READ(HSW_FUSE_STRAP) & HSW_CDCLK_LIMIT) return 450; else if ((I915_READ(LCPLL_CTL) & LCPLL_CLK_FREQ_MASK) == LCPLL_CLK_FREQ_450) return 450; else return 540; } void intel_ddi_pll_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; uint32_t val = I915_READ(LCPLL_CTL); /* The LCPLL register should be turned on by the BIOS. For now let's * just check its state and print errors in case something is wrong. * Don't even try to turn it on. */ DRM_DEBUG_KMS("CDCLK running at %dMHz\n", intel_ddi_get_cdclk_freq(dev_priv)); if (val & LCPLL_CD_SOURCE_FCLK) DRM_ERROR("CDCLK source is not LCPLL\n"); if (val & LCPLL_PLL_DISABLE) DRM_ERROR("LCPLL is disabled\n"); }