// 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; }