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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f9c10a9b96
The existing API passed around intel_i2c_chan pointers, which are dependent on the i2c bit-banging algo. This precluded the driver from using outputs which use a different algo. Switching to the more general i2c_adpater allows the driver to support non bit-banging DDC. This also required moving the slave address into the output private structures. Signed-off-by: Keith Packard <keithp@keithp.com>
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/*
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* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
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* Copyright (c) 2007 Intel Corporation
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* Jesse Barnes <jesse.barnes@intel.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/i2c.h>
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#include <linux/fb.h>
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#include "drmP.h"
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#include "intel_drv.h"
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#include "i915_drv.h"
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/**
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* intel_ddc_probe
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*
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*/
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bool intel_ddc_probe(struct intel_output *intel_output)
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{
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u8 out_buf[] = { 0x0, 0x0};
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u8 buf[2];
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int ret;
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struct i2c_msg msgs[] = {
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{
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.addr = 0x50,
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.flags = 0,
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.len = 1,
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.buf = out_buf,
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},
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{
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.addr = 0x50,
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.flags = I2C_M_RD,
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.len = 1,
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.buf = buf,
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}
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};
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intel_i2c_quirk_set(intel_output->base.dev, true);
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ret = i2c_transfer(intel_output->ddc_bus, msgs, 2);
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intel_i2c_quirk_set(intel_output->base.dev, false);
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if (ret == 2)
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return true;
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return false;
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}
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/**
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* intel_ddc_get_modes - get modelist from monitor
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* @connector: DRM connector device to use
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*
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* Fetch the EDID information from @connector using the DDC bus.
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*/
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int intel_ddc_get_modes(struct intel_output *intel_output)
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{
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struct edid *edid;
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int ret = 0;
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intel_i2c_quirk_set(intel_output->base.dev, true);
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edid = drm_get_edid(&intel_output->base, intel_output->ddc_bus);
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intel_i2c_quirk_set(intel_output->base.dev, false);
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if (edid) {
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drm_mode_connector_update_edid_property(&intel_output->base,
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edid);
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ret = drm_add_edid_modes(&intel_output->base, edid);
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intel_output->base.display_info.raw_edid = NULL;
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kfree(edid);
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}
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return ret;
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}
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