[src/trunk]: src/sys/dev/i2c add ddc_read_edid_block, which is the same as dd...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ead867b3d7c2
branches:  trunk
changeset: 803938:ead867b3d7c2
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Mon Nov 17 00:46:44 2014 +0000

description:
add ddc_read_edid_block, which is the same as ddc_read_edid but takes an additional block number argument

diffstat:

 sys/dev/i2c/ddc.c    |  12 +++++++++---
 sys/dev/i2c/ddcvar.h |   3 ++-
 2 files changed, 11 insertions(+), 4 deletions(-)

diffs (54 lines):

diff -r 8b495a9208e2 -r ead867b3d7c2 sys/dev/i2c/ddc.c
--- a/sys/dev/i2c/ddc.c Mon Nov 17 00:46:04 2014 +0000
+++ b/sys/dev/i2c/ddc.c Mon Nov 17 00:46:44 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ddc.c,v 1.3 2008/05/04 15:26:29 xtraeme Exp $ */
+/* $NetBSD: ddc.c,v 1.4 2014/11/17 00:46:44 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2006 Itronix Inc.
@@ -32,7 +32,7 @@
  */ 
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ddc.c,v 1.3 2008/05/04 15:26:29 xtraeme Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ddc.c,v 1.4 2014/11/17 00:46:44 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -91,12 +91,18 @@
 int
 ddc_read_edid(i2c_tag_t tag, uint8_t *dest, size_t len)
 {
+       return ddc_read_edid_block(tag, dest, len, DDC_EDID_START);
+}
+
+int
+ddc_read_edid_block(i2c_tag_t tag, uint8_t *dest, size_t len, uint8_t block)
+{
        uint8_t         wbuf[2];
 
        if (iic_acquire_bus(tag, I2C_F_POLL) != 0)
                return -1;
 
-       wbuf[0] = DDC_EDID_START;       /* start address */
+       wbuf[0] = block;        /* start address */
 
        if (iic_exec(tag, I2C_OP_READ_WITH_STOP, DDC_ADDR, wbuf, 1, dest,
                len, I2C_F_POLL)) {
diff -r 8b495a9208e2 -r ead867b3d7c2 sys/dev/i2c/ddcvar.h
--- a/sys/dev/i2c/ddcvar.h      Mon Nov 17 00:46:04 2014 +0000
+++ b/sys/dev/i2c/ddcvar.h      Mon Nov 17 00:46:44 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ddcvar.h,v 1.1 2006/04/25 21:18:16 gdamore Exp $       */
+/*     $NetBSD: ddcvar.h,v 1.2 2014/11/17 00:46:44 jmcneill Exp $      */
 
 /*-
  * Copyright (c) 2006 Itronix Inc.
@@ -40,5 +40,6 @@
  * autoconfiguration framework.
  */
 int ddc_read_edid(i2c_tag_t, u_int8_t *, size_t);
+int ddc_read_edid_block(i2c_tag_t, u_int8_t *, size_t, uint8_t);
 
 #endif /* _DEV_I2C_DDCVAR_H_ */