64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
/*
|
|
* 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 = to_intel_output(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,
|
|
}
|
|
};
|
|
|
|
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 = to_intel_output(output);
|
|
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;
|
|
}
|