The patch titled
bw-qcam: add module parameter 'force_init' to skip polite auto-detection prior to direct initialization.
has been removed from the -mm tree. Its filename was
bw-qcam-adds-module-parameter-aggressive-to-skip-polite-auto-detection-prior-to-direct-initialization.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: bw-qcam: add module parameter 'force_init' to skip polite auto-detection prior to direct initialization.
From: "Brett T. Warden" <brett.warden@xxxxxxxxx>
Setting force_init=1 bypasses the friendly auto-detection by polling the
status register, and instead attempts to initialize the qcam directly. Not
friendly to other parallel devices, but much more reliable than the
auto-detection.
Signed-off-by: Brett T. Warden <brett.warden@xxxxxxxxx>
Cc: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/media/video/bw-qcam.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff -puN drivers/media/video/bw-qcam.c~bw-qcam-adds-module-parameter-aggressive-to-skip-polite-auto-detection-prior-to-direct-initialization drivers/media/video/bw-qcam.c
--- a/drivers/media/video/bw-qcam.c~bw-qcam-adds-module-parameter-aggressive-to-skip-polite-auto-detection-prior-to-direct-initialization
+++ a/drivers/media/video/bw-qcam.c
@@ -82,11 +82,16 @@ OTHER DEALINGS IN THE SOFTWARE.
static unsigned int maxpoll=250; /* Maximum busy-loop count for qcam I/O */
static unsigned int yieldlines=4; /* Yield after this many during capture */
static int video_nr = -1;
+static unsigned int force_init; /* Whether to probe aggressively */
module_param(maxpoll, int, 0);
module_param(yieldlines, int, 0);
module_param(video_nr, int, 0);
+/* Set force_init=1 to avoid detection by polling status register and
+ * immediately attempt to initialize qcam */
+module_param(force_init, int, 0);
+
static inline int read_lpstatus(struct qcam_device *q)
{
return parport_read_status(q->pport);
@@ -331,6 +336,9 @@ static int qc_detect(struct qcam_device
int count = 0;
int i;
+ if (force_init)
+ return 1;
+
lastreg = reg = read_lpstatus(q) & 0xf0;
for (i = 0; i < 500; i++)
@@ -354,12 +362,12 @@ static int qc_detect(struct qcam_device
/* Be (even more) liberal in what you accept... */
-/* if (count > 30 && count < 200) */
if (count > 20 && count < 400) {
return 1; /* found */
} else {
printk(KERN_ERR "No Quickcam found on port %s\n",
q->pport->name);
+ printk(KERN_DEBUG "Quickcam detection counter: %u\n", count);
return 0; /* not found */
}
}
_
Patches currently in -mm which might be from brett.warden@xxxxxxxxx are
git-dvb.patch
-
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