Eugeni Dodonov | 45244b8 | 2012-05-09 15:37:20 -0300 | [diff] [blame^] | 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 | } |