50 lines
918 B
C
50 lines
918 B
C
|
#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;
|
||
|
|
|
||
|
|
return drm_add_edid_modes(output, &intel_output->ddc_bus->adapter);
|
||
|
|
}
|