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| // SPDX-License-Identifier: GPL-2.0-only
| /*
| * Copyright (c) 2007 Intel Corporation
| *
| * Authers: Jesse Barnes <jesse.barnes@intel.com>
| */
|
| #include <linux/i2c.h>
|
| #include "psb_intel_drv.h"
|
| /**
| * psb_intel_ddc_probe
| *
| */
| bool psb_intel_ddc_probe(struct i2c_adapter *adapter)
| {
| 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,
| }
| };
|
| ret = i2c_transfer(adapter, msgs, 2);
| if (ret == 2)
| return true;
|
| return false;
| }
|
| /**
| * psb_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 psb_intel_ddc_get_modes(struct drm_connector *connector,
| struct i2c_adapter *adapter)
| {
| struct edid *edid;
| int ret = 0;
|
| edid = drm_get_edid(connector, adapter);
| if (edid) {
| drm_connector_update_edid_property(connector, edid);
| ret = drm_add_edid_modes(connector, edid);
| kfree(edid);
| }
| return ret;
| }
|
|
