mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-22 10:34:55 +08:00
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
/*
|
|
* 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/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;
|
|
}
|