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/*
* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
* Copyright (c) 2007 Intel Corporation
* Jesse Barnes <jesse.barnes@intel.com>
*/
#include <linux/i2c.h>
#include <linux/fb.h>
#include "drmP.h"
#include "intel_drv.h"
/**
* intel_ddc_probe
*
*/
bool intel_ddc_probe(struct drm_output *output)
{
struct intel_output *intel_output = output->driver_private;
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(&intel_output->ddc_bus->adapter, msgs, 2);
if (ret == 2)
return true;
return false;
}
/**
* intel_ddc_get_modes - get modelist from monitor
* @output: DRM output device to use
*
* Fetch the EDID information from @output using the DDC bus.
*/
int intel_ddc_get_modes(struct drm_output *output)
{
struct intel_output *intel_output = output->driver_private;
struct edid *edid;
int ret = 0;
edid = drm_get_edid(output, &intel_output->ddc_bus->adapter);
if (edid) {
drm_mode_output_update_edid_property(output, edid);
ret = drm_add_edid_modes(output, edid);
kfree(edid);
}
return ret;
}
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