Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> |
Chris Wilson | f899fc6 | 2010-07-20 15:44:45 -0700 | [diff] [blame] | 3 | * Copyright (c) 2007, 2010 Intel Corporation |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 4 | * Jesse Barnes <jesse.barnes@intel.com> |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the "Software"), |
| 8 | * to deal in the Software without restriction, including without limitation |
| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
| 11 | * Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice (including the next |
| 14 | * paragraph) shall be included in all copies or substantial portions of the |
| 15 | * Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 22 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 23 | * DEALINGS IN THE SOFTWARE. |
| 24 | */ |
| 25 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 27 | #include <linux/i2c.h> |
| 28 | #include <linux/fb.h> |
| 29 | #include "drmP.h" |
| 30 | #include "intel_drv.h" |
Shaohua Li | 0ba0e9e | 2009-04-07 11:02:28 +0800 | [diff] [blame] | 31 | #include "i915_drv.h" |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 32 | |
| 33 | /** |
| 34 | * intel_ddc_probe |
| 35 | * |
| 36 | */ |
Chris Wilson | f899fc6 | 2010-07-20 15:44:45 -0700 | [diff] [blame] | 37 | bool intel_ddc_probe(struct intel_encoder *intel_encoder, int ddc_bus) |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 38 | { |
Chris Wilson | f899fc6 | 2010-07-20 15:44:45 -0700 | [diff] [blame] | 39 | struct drm_i915_private *dev_priv = intel_encoder->base.dev->dev_private; |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 40 | u8 out_buf[] = { 0x0, 0x0}; |
| 41 | u8 buf[2]; |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 42 | struct i2c_msg msgs[] = { |
| 43 | { |
| 44 | .addr = 0x50, |
| 45 | .flags = 0, |
| 46 | .len = 1, |
| 47 | .buf = out_buf, |
| 48 | }, |
| 49 | { |
| 50 | .addr = 0x50, |
| 51 | .flags = I2C_M_RD, |
| 52 | .len = 1, |
| 53 | .buf = buf, |
| 54 | } |
| 55 | }; |
| 56 | |
Chris Wilson | f899fc6 | 2010-07-20 15:44:45 -0700 | [diff] [blame] | 57 | return i2c_transfer(&dev_priv->gmbus[ddc_bus].adapter, msgs, 2) == 2; |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 58 | } |
| 59 | |
| 60 | /** |
| 61 | * intel_ddc_get_modes - get modelist from monitor |
| 62 | * @connector: DRM connector device to use |
Zhenyu Wang | 335af9a | 2010-03-30 14:39:31 +0800 | [diff] [blame] | 63 | * @adapter: i2c adapter |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 64 | * |
| 65 | * Fetch the EDID information from @connector using the DDC bus. |
| 66 | */ |
Zhenyu Wang | 335af9a | 2010-03-30 14:39:31 +0800 | [diff] [blame] | 67 | int intel_ddc_get_modes(struct drm_connector *connector, |
| 68 | struct i2c_adapter *adapter) |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 69 | { |
| 70 | struct edid *edid; |
| 71 | int ret = 0; |
| 72 | |
Zhenyu Wang | 335af9a | 2010-03-30 14:39:31 +0800 | [diff] [blame] | 73 | edid = drm_get_edid(connector, adapter); |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 74 | if (edid) { |
Zhenyu Wang | 335af9a | 2010-03-30 14:39:31 +0800 | [diff] [blame] | 75 | drm_mode_connector_update_edid_property(connector, edid); |
| 76 | ret = drm_add_edid_modes(connector, edid); |
| 77 | connector->display_info.raw_edid = NULL; |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 78 | kfree(edid); |
| 79 | } |
| 80 | |
| 81 | return ret; |
| 82 | } |