ChangeSet 1.2231.1.126, 2005/03/28 19:51:36-08:00, [EMAIL PROTECTED]
[PATCH] DVD-RAM support for pktcdvd
This patch makes it possible to use the packet writing driver with
DVD-RAM discs. The pktcdvd driver is not needed for writing to DVD-RAM
discs but it can improve write performance. Polg�r Istv�n reports:
I wrote 178716Kb data to DVD-RAM without pktcdvd driver within
4.54 minutes. With pktcdvd driver it took me 2.33 minutes.
Signed-off-by: Peter Osterlund <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
Documentation/cdrom/packet-writing.txt | 8 ++++++++
drivers/block/pktcdvd.c | 9 +++++++--
2 files changed, 15 insertions(+), 2 deletions(-)
diff -Nru a/Documentation/cdrom/packet-writing.txt
b/Documentation/cdrom/packet-writing.txt
--- a/Documentation/cdrom/packet-writing.txt 2005-03-28 21:34:20 -08:00
+++ b/Documentation/cdrom/packet-writing.txt 2005-03-28 21:34:20 -08:00
@@ -62,6 +62,14 @@
# mount /dev/pktcdvd/dev_name /cdrom -t udf -o rw,noatime
+Packet writing for DVD-RAM media
+--------------------------------
+
+DVD-RAM discs are random writable, so using the pktcdvd driver is not
+necessary. However, using the pktcdvd driver can improve performance
+in the same way it does for DVD+RW media.
+
+
Notes
-----
diff -Nru a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
--- a/drivers/block/pktcdvd.c 2005-03-28 21:34:20 -08:00
+++ b/drivers/block/pktcdvd.c 2005-03-28 21:34:20 -08:00
@@ -1421,8 +1421,8 @@
char buffer[128];
int ret, size;
- /* doesn't apply to DVD+RW */
- if (pd->mmc3_profile == 0x1a)
+ /* doesn't apply to DVD+RW or DVD-RAM */
+ if ((pd->mmc3_profile == 0x1a) || (pd->mmc3_profile == 0x12))
return 0;
memset(buffer, 0, sizeof(buffer));
@@ -1536,6 +1536,7 @@
break;
case 0x1a: /* DVD+RW */
case 0x13: /* DVD-RW */
+ case 0x12: /* DVD-RAM */
return 0;
default:
printk("pktcdvd: Wrong disc profile (%x)\n",
pd->mmc3_profile);
@@ -1601,6 +1602,9 @@
case 0x13: /* DVD-RW */
printk("pktcdvd: inserted media is DVD-RW\n");
break;
+ case 0x12: /* DVD-RAM */
+ printk("pktcdvd: inserted media is DVD-RAM\n");
+ break;
default:
printk("pktcdvd: inserted media is CD-R%s\n",
di.erasable ? "W" : "");
break;
@@ -1893,6 +1897,7 @@
switch (pd->mmc3_profile) {
case 0x13: /* DVD-RW */
case 0x1a: /* DVD+RW */
+ case 0x12: /* DVD-RAM */
DPRINTK("pktcdvd: write speed %ukB/s\n", write_speed);
break;
default:
-
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