Alan Cox | 89c7813 | 2011-11-03 18:22:15 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2007 Intel Corporation |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | * |
| 17 | * Authers: Jesse Barnes <jesse.barnes@intel.com> |
| 18 | */ |
| 19 | |
| 20 | #include <linux/i2c.h> |
| 21 | #include <linux/fb.h> |
| 22 | #include <drm/drmP.h> |
| 23 | #include "psb_intel_drv.h" |
| 24 | |
| 25 | /** |
| 26 | * psb_intel_ddc_probe |
| 27 | * |
| 28 | */ |
Patrik Jakobsson | 352b16a | 2011-12-19 21:40:05 +0000 | [diff] [blame] | 29 | bool psb_intel_ddc_probe(struct i2c_adapter *adapter) |
Alan Cox | 89c7813 | 2011-11-03 18:22:15 +0000 | [diff] [blame] | 30 | { |
| 31 | u8 out_buf[] = { 0x0, 0x0 }; |
| 32 | u8 buf[2]; |
| 33 | int ret; |
| 34 | struct i2c_msg msgs[] = { |
| 35 | { |
| 36 | .addr = 0x50, |
| 37 | .flags = 0, |
| 38 | .len = 1, |
| 39 | .buf = out_buf, |
| 40 | }, |
| 41 | { |
| 42 | .addr = 0x50, |
| 43 | .flags = I2C_M_RD, |
| 44 | .len = 1, |
| 45 | .buf = buf, |
| 46 | } |
| 47 | }; |
| 48 | |
Patrik Jakobsson | 352b16a | 2011-12-19 21:40:05 +0000 | [diff] [blame] | 49 | ret = i2c_transfer(adapter, msgs, 2); |
Alan Cox | 89c7813 | 2011-11-03 18:22:15 +0000 | [diff] [blame] | 50 | if (ret == 2) |
| 51 | return true; |
| 52 | |
| 53 | return false; |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * psb_intel_ddc_get_modes - get modelist from monitor |
| 58 | * @connector: DRM connector device to use |
| 59 | * |
| 60 | * Fetch the EDID information from @connector using the DDC bus. |
| 61 | */ |
Patrik Jakobsson | 352b16a | 2011-12-19 21:40:05 +0000 | [diff] [blame] | 62 | int psb_intel_ddc_get_modes(struct drm_connector *connector, |
| 63 | struct i2c_adapter *adapter) |
Alan Cox | 89c7813 | 2011-11-03 18:22:15 +0000 | [diff] [blame] | 64 | { |
| 65 | struct edid *edid; |
| 66 | int ret = 0; |
| 67 | |
Patrik Jakobsson | 352b16a | 2011-12-19 21:40:05 +0000 | [diff] [blame] | 68 | edid = drm_get_edid(connector, adapter); |
Alan Cox | 89c7813 | 2011-11-03 18:22:15 +0000 | [diff] [blame] | 69 | if (edid) { |
Patrik Jakobsson | 352b16a | 2011-12-19 21:40:05 +0000 | [diff] [blame] | 70 | drm_mode_connector_update_edid_property(connector, edid); |
| 71 | ret = drm_add_edid_modes(connector, edid); |
Alan Cox | 89c7813 | 2011-11-03 18:22:15 +0000 | [diff] [blame] | 72 | kfree(edid); |
| 73 | } |
| 74 | return ret; |
| 75 | } |