| /* |
| * 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 <eugeni.dodonov@intel.com> |
| * |
| */ |
| |
| #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 */ |
| }; |
| |
| /* 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); |
| } |
| } |