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Date: Wed, 27 Apr 2011 22:35:45 +0200
From: Ondrej Zary <linux@...nbow-software.org>
To: "Hans Verkuil" <hverkuil@...all.nl>
Cc: "Hans de Goede" <hdegoede@...hat.com>,
"Joerg Heckenbach" <joerg@...kenbach-aw.de>,
"Dwaine Garden" <dwainegarden@...ers.com>,
linux-media@...r.kernel.org,
"Kernel development list" <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/4] usbvision: remove broken testpattern
Enabling force_testpattern module parameter in usbvision causes kernel panic.
Things like that does not belong to the kernel anyway so the fix is easy.
Signed-off-by: Ondrej Zary <linux@...nbow-software.org>
diff -up linux-2.6.39-rc2-/drivers/media/video/usbvision/usbvision-core.c linux-2.6.39-rc2/drivers/media/video/usbvision/usbvision-core.c
--- linux-2.6.39-rc2-/drivers/media/video/usbvision/usbvision-core.c 2011-04-27 22:08:32.000000000 +0200
+++ linux-2.6.39-rc2/drivers/media/video/usbvision/usbvision-core.c 2011-04-27 22:08:53.000000000 +0200
@@ -49,10 +49,6 @@ static unsigned int core_debug;
module_param(core_debug, int, 0644);
MODULE_PARM_DESC(core_debug, "enable debug messages [core]");
-static unsigned int force_testpattern;
-module_param(force_testpattern, int, 0644);
-MODULE_PARM_DESC(force_testpattern, "enable test pattern display [core]");
-
static int adjust_compression = 1; /* Set the compression to be adaptive */
module_param(adjust_compression, int, 0444);
MODULE_PARM_DESC(adjust_compression, " Set the ADPCM compression for the device. Default: 1 (On)");
@@ -388,90 +384,6 @@ void usbvision_scratch_free(struct usb_u
}
/*
- * usbvision_testpattern()
- *
- * Procedure forms a test pattern (yellow grid on blue background).
- *
- * Parameters:
- * fullframe: if TRUE then entire frame is filled, otherwise the procedure
- * continues from the current scanline.
- * pmode 0: fill the frame with solid blue color (like on VCR or TV)
- * 1: Draw a colored grid
- *
- */
-static void usbvision_testpattern(struct usb_usbvision *usbvision,
- int fullframe, int pmode)
-{
- static const char proc[] = "usbvision_testpattern";
- struct usbvision_frame *frame;
- unsigned char *f;
- int num_cell = 0;
- int scan_length = 0;
- static int num_pass;
-
- if (usbvision == NULL) {
- printk(KERN_ERR "%s: usbvision == NULL\n", proc);
- return;
- }
- if (usbvision->cur_frame == NULL) {
- printk(KERN_ERR "%s: usbvision->cur_frame is NULL.\n", proc);
- return;
- }
-
- /* Grab the current frame */
- frame = usbvision->cur_frame;
-
- /* Optionally start at the beginning */
- if (fullframe) {
- frame->curline = 0;
- frame->scanlength = 0;
- }
-
- /* Form every scan line */
- for (; frame->curline < frame->frmheight; frame->curline++) {
- int i;
-
- f = frame->data + (usbvision->curwidth * 3 * frame->curline);
- for (i = 0; i < usbvision->curwidth; i++) {
- unsigned char cb = 0x80;
- unsigned char cg = 0;
- unsigned char cr = 0;
-
- if (pmode == 1) {
- if (frame->curline % 32 == 0)
- cb = 0, cg = cr = 0xFF;
- else if (i % 32 == 0) {
- if (frame->curline % 32 == 1)
- num_cell++;
- cb = 0, cg = cr = 0xFF;
- } else {
- cb =
- ((num_cell * 7) +
- num_pass) & 0xFF;
- cg =
- ((num_cell * 5) +
- num_pass * 2) & 0xFF;
- cr =
- ((num_cell * 3) +
- num_pass * 3) & 0xFF;
- }
- } else {
- /* Just the blue screen */
- }
-
- *f++ = cb;
- *f++ = cg;
- *f++ = cr;
- scan_length += 3;
- }
- }
-
- frame->grabstate = frame_state_done;
- frame->scanlength += scan_length;
- ++num_pass;
-}
-
-/*
* usbvision_decompress_alloc()
*
* allocates intermediate buffer for decompression
@@ -571,10 +483,6 @@ static enum parse_state usbvision_find_h
frame->scanstate = scan_state_lines;
frame->curline = 0;
- if (force_testpattern) {
- usbvision_testpattern(usbvision, 1, 1);
- return parse_state_next_frame;
- }
return parse_state_continue;
}
--
Ondrej Zary
--
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