| commit | 6d77444aca298b43a88086be446f943cd0442ef7 | |
| author | Jonathan Corbet <corbet@lwn.net> | |
| Fri, 17 Aug 2007 04:02:33 +0000 (17 01:02 -0300) | ||
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | |
| Mon, 20 Aug 2007 15:18:04 +0000 (20 12:18 -0300) | ||
| tree | 3d0b4c4834fcd1048e4f80c5f60847efbe102fdf | treesnapshot (tar.gz zip) |
| parent | 01659f2a0067d855089811529fa596cbc40f1e75 | commitdiff |
V4L/DVB (6027): Get rid of an ill-behaved msleep in i2c write
Configuring the OLPC camera requires something over 150 register
writes. Unfortunately, querying the CAFE i2c controller too
soon after a write causes the hardware to flake. The problem had
been "solved" with an msleep() call, but, between the number of
registers and how msleep() behaves, that resulted in a 3-second
delay on camera initialization. Instead, we hand-code a wait for
the completion interrupt which avoids reading the status registers.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Configuring the OLPC camera requires something over 150 register
writes. Unfortunately, querying the CAFE i2c controller too
soon after a write causes the hardware to flake. The problem had
been "solved" with an msleep() call, but, between the number of
registers and how msleep() behaves, that resulted in a 3-second
delay on camera initialization. Instead, we hand-code a wait for
the completion interrupt which avoids reading the status registers.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| drivers/media/video/cafe_ccic.c | diffblobblamehistory | |
| drivers/media/video/ov7670.c | diffblobblamehistory |