| /* |
| * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> |
| * Copyright (c) 2007 Intel Corporation |
| * Jesse Barnes <jesse.barnes@intel.com> |
| * |
| * 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. |
| */ |
| |
| #include <linux/slab.h> |
| #include <linux/i2c.h> |
| #include <linux/fb.h> |
| #include "drmP.h" |
| #include "intel_drv.h" |
| #include "i915_drv.h" |
| |
| /** |
| * intel_ddc_probe |
| * |
| */ |
| bool intel_ddc_probe(struct intel_output *intel_output) |
| { |
| u8 out_buf[] = { 0x0, 0x0}; |
| u8 buf[2]; |
| int ret; |
| struct i2c_msg msgs[] = { |
| { |
| .addr = 0x50, |
| .flags = 0, |
| .len = 1, |
| .buf = out_buf, |
| }, |
| { |
| .addr = 0x50, |
| .flags = I2C_M_RD, |
| .len = 1, |
| .buf = buf, |
| } |
| }; |
| |
| intel_i2c_quirk_set(intel_output->base.dev, true); |
| ret = i2c_transfer(intel_output->ddc_bus, msgs, 2); |
| intel_i2c_quirk_set(intel_output->base.dev, false); |
| if (ret == 2) |
| return true; |
| |
| return false; |
| } |
| |
| /** |
| * intel_ddc_get_modes - get modelist from monitor |
| * @connector: DRM connector device to use |
| * |
| * Fetch the EDID information from @connector using the DDC bus. |
| */ |
| int intel_ddc_get_modes(struct intel_output *intel_output) |
| { |
| struct edid *edid; |
| int ret = 0; |
| |
| intel_i2c_quirk_set(intel_output->base.dev, true); |
| edid = drm_get_edid(&intel_output->base, intel_output->ddc_bus); |
| intel_i2c_quirk_set(intel_output->base.dev, false); |
| if (edid) { |
| drm_mode_connector_update_edid_property(&intel_output->base, |
| edid); |
| ret = drm_add_edid_modes(&intel_output->base, edid); |
| intel_output->base.display_info.raw_edid = NULL; |
| kfree(edid); |
| } |
| |
| return ret; |
| } |