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authorMauro Carvalho Chehab <mchehab@brturbo.com.br>2005-08-04 15:53:30 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-04 16:00:54 -0400
commit4dcef52400fa6b9eb2de589300ae0151a1c65b3b (patch)
treef8023c75eb4ce1fad2e22560aaf1e52a27254046 /drivers/media/video/bttv-driver.c
parent75eedfed3e2d05563f44d2f69efb991fad95d7f1 (diff)
[PATCH] v4l: oopsfix for BTTV on badly behaved PCI chipsets
no_overlay bttv parameter implemented to fix OOPS on some PCI chipsets (like some VIA) with these behaviors: 1) If pci_quicks does identify the chip as having troubles to handle PCI2PCI transfers, no_overlay defaults to 1. The user may force it to 0, to reenable (not recommended). 2) For newer chipsets not blacklisted, no_overlay=1 is provided as a workaround until PCI chipset included on /drivers/pci/quirks.c Thanks to Bodo Eggert <7eggert@gmx.de> Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/media/video/bttv-driver.c')
-rw-r--r--drivers/media/video/bttv-driver.c28
1 files changed, 24 insertions, 4 deletions
diff --git a/drivers/media/video/bttv-driver.c b/drivers/media/video/bttv-driver.c
index 67f331eeeb19..eee9322ce21b 100644
--- a/drivers/media/video/bttv-driver.c
+++ b/drivers/media/video/bttv-driver.c
@@ -1,5 +1,5 @@
1/* 1/*
2 $Id: bttv-driver.c,v 1.45 2005/07/20 19:43:24 mkrufky Exp $ 2 $Id: bttv-driver.c,v 1.52 2005/08/04 00:55:16 mchehab Exp $
3 3
4 bttv - Bt848 frame grabber driver 4 bttv - Bt848 frame grabber driver
5 5
@@ -80,6 +80,7 @@ static unsigned int irq_iswitch = 0;
80static unsigned int uv_ratio = 50; 80static unsigned int uv_ratio = 50;
81static unsigned int full_luma_range = 0; 81static unsigned int full_luma_range = 0;
82static unsigned int coring = 0; 82static unsigned int coring = 0;
83extern int no_overlay;
83 84
84/* API features (turn on/off stuff for testing) */ 85/* API features (turn on/off stuff for testing) */
85static unsigned int v4l2 = 1; 86static unsigned int v4l2 = 1;
@@ -2151,6 +2152,10 @@ static int bttv_s_fmt(struct bttv_fh *fh, struct bttv *btv,
2151 return 0; 2152 return 0;
2152 } 2153 }
2153 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 2154 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
2155 if (no_overlay > 0) {
2156 printk ("V4L2_BUF_TYPE_VIDEO_OVERLAY: no_overlay\n");
2157 return -EINVAL;
2158 }
2154 return setup_window(fh, btv, &f->fmt.win, 1); 2159 return setup_window(fh, btv, &f->fmt.win, 1);
2155 case V4L2_BUF_TYPE_VBI_CAPTURE: 2160 case V4L2_BUF_TYPE_VBI_CAPTURE:
2156 retval = bttv_switch_type(fh,f->type); 2161 retval = bttv_switch_type(fh,f->type);
@@ -2224,9 +2229,11 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
2224 /* others */ 2229 /* others */
2225 cap->type = VID_TYPE_CAPTURE| 2230 cap->type = VID_TYPE_CAPTURE|
2226 VID_TYPE_TUNER| 2231 VID_TYPE_TUNER|
2227 VID_TYPE_OVERLAY|
2228 VID_TYPE_CLIPPING| 2232 VID_TYPE_CLIPPING|
2229 VID_TYPE_SCALES; 2233 VID_TYPE_SCALES;
2234 if (no_overlay <= 0)
2235 cap->type |= VID_TYPE_OVERLAY;
2236
2230 cap->maxwidth = bttv_tvnorms[btv->tvnorm].swidth; 2237 cap->maxwidth = bttv_tvnorms[btv->tvnorm].swidth;
2231 cap->maxheight = bttv_tvnorms[btv->tvnorm].sheight; 2238 cap->maxheight = bttv_tvnorms[btv->tvnorm].sheight;
2232 cap->minwidth = 48; 2239 cap->minwidth = 48;
@@ -2302,6 +2309,11 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
2302 struct video_window *win = arg; 2309 struct video_window *win = arg;
2303 struct v4l2_window w2; 2310 struct v4l2_window w2;
2304 2311
2312 if (no_overlay > 0) {
2313 printk ("VIDIOCSWIN: no_overlay\n");
2314 return -EINVAL;
2315 }
2316
2305 w2.field = V4L2_FIELD_ANY; 2317 w2.field = V4L2_FIELD_ANY;
2306 w2.w.left = win->x; 2318 w2.w.left = win->x;
2307 w2.w.top = win->y; 2319 w2.w.top = win->y;
@@ -2577,10 +2589,12 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
2577 cap->version = BTTV_VERSION_CODE; 2589 cap->version = BTTV_VERSION_CODE;
2578 cap->capabilities = 2590 cap->capabilities =
2579 V4L2_CAP_VIDEO_CAPTURE | 2591 V4L2_CAP_VIDEO_CAPTURE |
2580 V4L2_CAP_VIDEO_OVERLAY |
2581 V4L2_CAP_VBI_CAPTURE | 2592 V4L2_CAP_VBI_CAPTURE |
2582 V4L2_CAP_READWRITE | 2593 V4L2_CAP_READWRITE |
2583 V4L2_CAP_STREAMING; 2594 V4L2_CAP_STREAMING;
2595 if (no_overlay <= 0)
2596 cap->capabilities |= V4L2_CAP_VIDEO_OVERLAY;
2597
2584 if (bttv_tvcards[btv->c.type].tuner != UNSET && 2598 if (bttv_tvcards[btv->c.type].tuner != UNSET &&
2585 bttv_tvcards[btv->c.type].tuner != TUNER_ABSENT) 2599 bttv_tvcards[btv->c.type].tuner != TUNER_ABSENT)
2586 cap->capabilities |= V4L2_CAP_TUNER; 2600 cap->capabilities |= V4L2_CAP_TUNER;
@@ -3076,7 +3090,7 @@ static struct file_operations bttv_fops =
3076static struct video_device bttv_video_template = 3090static struct video_device bttv_video_template =
3077{ 3091{
3078 .name = "UNSET", 3092 .name = "UNSET",
3079 .type = VID_TYPE_CAPTURE|VID_TYPE_TUNER|VID_TYPE_OVERLAY| 3093 .type = VID_TYPE_CAPTURE|VID_TYPE_TUNER|
3080 VID_TYPE_CLIPPING|VID_TYPE_SCALES, 3094 VID_TYPE_CLIPPING|VID_TYPE_SCALES,
3081 .hardware = VID_HARDWARE_BT848, 3095 .hardware = VID_HARDWARE_BT848,
3082 .fops = &bttv_fops, 3096 .fops = &bttv_fops,
@@ -3756,6 +3770,12 @@ static void bttv_unregister_video(struct bttv *btv)
3756/* register video4linux devices */ 3770/* register video4linux devices */
3757static int __devinit bttv_register_video(struct bttv *btv) 3771static int __devinit bttv_register_video(struct bttv *btv)
3758{ 3772{
3773 if (no_overlay <= 0) {
3774 bttv_video_template.type |= VID_TYPE_OVERLAY;
3775 } else {
3776 printk("bttv: Overlay support disabled.\n");
3777 }
3778
3759 /* video */ 3779 /* video */
3760 btv->video_dev = vdev_init(btv, &bttv_video_template, "video"); 3780 btv->video_dev = vdev_init(btv, &bttv_video_template, "video");
3761 if (NULL == btv->video_dev) 3781 if (NULL == btv->video_dev)