projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 45244b87 ED |
1 | /* |
| 2 | * Copyright © 2012 Intel Corporation | |
| 3 | * | |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
| 5 | * copy of this software and associated documentation files (the "Software"), | |
| 6 | * to deal in the Software without restriction, including without limitation | |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the | |
| 9 | * Software is furnished to do so, subject to the following conditions: | |
| 10 | * | |
| 11 | * The above copyright notice and this permission notice (including the next | |
| 12 | * paragraph) shall be included in all copies or substantial portions of the | |
| 13 | * Software. | |
| 14 | * | |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
| 21 | * IN THE SOFTWARE. | |
| 22 | * | |
| 23 | * Authors: | |
| 24 | * Eugeni Dodonov <eugeni.dodonov@intel.com> | |
| 25 | * | |
| 26 | */ | |
| 27 | ||
| 28 | #include "i915_drv.h" | |
| 29 | #include "intel_drv.h" | |
| 30 | ||
| 31 | /* HDMI/DVI modes ignore everything but the last 2 items. So we share | |
| 32 | * them for both DP and FDI transports, allowing those ports to | |
| 33 | * automatically adapt to HDMI connections as well | |
| 34 | */ | |
| 35 | static const u32 hsw_ddi_translations_dp[] = { | |
| 36 | 0x00FFFFFF, 0x0006000E, /* DP parameters */ | |
| 37 | 0x00D75FFF, 0x0005000A, | |
| 38 | 0x00C30FFF, 0x00040006, | |
| 39 | 0x80AAAFFF, 0x000B0000, | |
| 40 | 0x00FFFFFF, 0x0005000A, | |
| 41 | 0x00D75FFF, 0x000C0004, | |
| 42 | 0x80C30FFF, 0x000B0000, | |
| 43 | 0x00FFFFFF, 0x00040006, | |
| 44 | 0x80D75FFF, 0x000B0000, | |
| 45 | 0x00FFFFFF, 0x00040006 /* HDMI parameters */ | |
| 46 | }; | |
| 47 | ||
| 48 | static const u32 hsw_ddi_translations_fdi[] = { | |
| 49 | 0x00FFFFFF, 0x0007000E, /* FDI parameters */ | |
| 50 | 0x00D75FFF, 0x000F000A, | |
| 51 | 0x00C30FFF, 0x00060006, | |
| 52 | 0x00AAAFFF, 0x001E0000, | |
| 53 | 0x00FFFFFF, 0x000F000A, | |
| 54 | 0x00D75FFF, 0x00160004, | |
| 55 | 0x00C30FFF, 0x001E0000, | |
| 56 | 0x00FFFFFF, 0x00060006, | |
| 57 | 0x00D75FFF, 0x001E0000, | |
| 58 | 0x00FFFFFF, 0x00040006 /* HDMI parameters */ | |
| 59 | }; | |
| 60 | ||
| 61 | /* On Haswell, DDI port buffers must be programmed with correct values | |
| 62 | * in advance. The buffer values are different for FDI and DP modes, | |
| 63 | * but the HDMI/DVI fields are shared among those. So we program the DDI | |
| 64 | * in either FDI or DP modes only, as HDMI connections will work with both | |
| 65 | * of those | |
| 66 | */ | |
| 67 | void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port, bool use_fdi_mode) | |
| 68 | { | |
| 69 | struct drm_i915_private *dev_priv = dev->dev_private; | |
| 70 | u32 reg; | |
| 71 | int i; | |
| 72 | const u32 *ddi_translations = ((use_fdi_mode) ? | |
| 73 | hsw_ddi_translations_fdi : | |
| 74 | hsw_ddi_translations_dp); | |
| 75 | ||
| 76 | DRM_DEBUG_DRIVER("Initializing DDI buffers for port %c in %s mode\n", | |
| 77 | port_name(port), | |
| 78 | use_fdi_mode ? "FDI" : "DP"); | |
| 79 | ||
| 80 | WARN((use_fdi_mode && (port != PORT_E)), | |
| 81 | "Programming port %c in FDI mode, this probably will not work.\n", | |
| 82 | port_name(port)); | |
| 83 | ||
| 84 | for (i=0, reg=DDI_BUF_TRANS(port); i < ARRAY_SIZE(hsw_ddi_translations_fdi); i++) { | |
| 85 | I915_WRITE(reg, ddi_translations[i]); | |
| 86 | reg += 4; | |
| 87 | } | |
| 88 | } | |
| 89 | ||
| 90 | /* Program DDI buffers translations for DP. By default, program ports A-D in DP | |
| 91 | * mode and port E for FDI. | |
| 92 | */ | |
| 93 | void intel_prepare_ddi(struct drm_device *dev) | |
| 94 | { | |
| 95 | int port; | |
| 96 | ||
| 97 | if (IS_HASWELL(dev)) { | |
| 98 | for (port = PORT_A; port < PORT_E; port++) | |
| 99 | intel_prepare_ddi_buffers(dev, port, false); | |
| 100 | ||
| 101 | /* DDI E is the suggested one to work in FDI mode, so program is as such by | |
| 102 | * default. It will have to be re-programmed in case a digital DP output | |
| 103 | * will be detected on it | |
| 104 | */ | |
| 105 | intel_prepare_ddi_buffers(dev, PORT_E, true); | |
| 106 | } | |
| 107 | } |