04-13-2014
You can always try to build a kernel with it, but I doubt it will work. If it did, it'd be part of the GENERIC config.
Also, note that the bktr driver appears to be an i2c master. You'd need iic(4) on hppa (I'm not familiar with the architecture, just mentioning it).
Regards,
Alister
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DDC(9) BSD Kernel Developer's Manual DDC(9)
NAME
ddc -- VESA Display Data Channel V2
SYNOPSIS
#include <dev/i2c/ddcvar.h>
int
ddc_read_edid(i2c_tag_t tag, uint8_t *dest, size_t len);
DESCRIPTION
The ddc_read_edid() reads a VESA Extended Display Identification Data block (EDID) via VESA Display Data Channel (DDCv2). DDCv2 is a proto-
col for data exchange between display devices (such as monitors and flat panels) and host machines using an I2C bus.
The tag argument is a machine-dependent tag used to specify the I2C bus on which the DDCv2 device is located. The dest argument is a pointer
to a buffer where the EDID data will be stored. The len argument is the amount of data to read into the buffer. (The buffer must be large
enough.) Typically, this value will be 128, which is the size of a normal EDID data block.
Normally the EDID data block will be post-processed with the edid_parse() function.
RETURN VALUES
The ddc_read_edid() function returns zero on success, and non-zero otherwise.
ENVIRONMENT
The ddc_read_edid() function is part of the ddc(4) driver, and is only included in the kernel if that driver is also included.
EXAMPLES
The following code uses ddc_read_edid() to retrieve and print information about a monitor:
struct edid_info info;
i2c_tag_t tag;
char buffer[128];
...
/* initialize i2c tag... */
...
if ((ddc_read_edid(tag, buffer, 128) == 0) &&
(edid_parse(buffer, &info) == 0))
edid_print(info);
...
Note that this must be called before the PCI bus is attached during autoconfiguration.
SEE ALSO
ddc(4), edid(9), iic(9)
HISTORY
DDCv2 support was added in NetBSD 4.0.
AUTHORS
Garrett D'Amore <gdamore@NetBSD.org>
BSD
May 11, 2006 BSD