lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

V4L/DVB (12836): tm6000: revert to an old way to copy video

Browse Source 
The new way is causing machine hangups. This one works.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab
2008-04-09 08:07:20 -03:00
parent c144c03715
commit ed0236afa2
2 changed files with 193 additions and 202 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/staging/tm6000/tm6000-usb-isoc.h
View File

@@ -34,24 +34,20 @@ struct usb_isoc_ctl {
/* transfer buffers for isoc transfer */
char **transfer_buffer;
/* Last buffer control */
int pending;
int pos;
/* Last buffer command and region */
u8 cmd;
int pos, size, pktsize;
/* Last field: ODD or EVEN? */
int field;
/* Stores incomplete commands */
u8 tbuf[TM6000_URB_MSG_LEN+4];
size_t len;
u32 tmp_buf;
int tmp_buf_len;
/* Stores already requested buffers */
struct tm6000_buffer *buf;
/* Stores the number of received fields */
int nfields;
/* Checks if a complete field were received */
int last_line;
unsigned int fields:2;
};

153
drivers/staging/tm6000/tm6000-video.c
View File

@@ -192,6 +192,7 @@ static int copy_packet(struct urb *urb, u32 header, u8 **ptr, u8 *endp,
*/
unsigned int linewidth = (*buf)->vb.width << 1;
if (!dev->isoc_ctl.cmd) {
c = (header >> 24) & 0xff;
/* split the header fields */
@@ -234,22 +235,6 @@ static int copy_packet(struct urb *urb, u32 header, u8 **ptr, u8 *endp,
" line=%d, field=%d\n",
size, block, line, field);
/* Checks if a complete set of frame0 + frame 1 were received */
if (dev->isoc_ctl.last_line > line) {
if (dev->isoc_ctl.fields == 3) {
/* Announces that a new buffer were filled */
buffer_filled(dev, dma_q, *buf);
dprintk(dev, V4L2_DEBUG_ISOC,
"new buffer filled\n");
rc = get_next_buf(dma_q, buf);
dev->isoc_ctl.fields = 0;
} else {
dev->isoc_ctl.fields |= 1 << field;
}
}
dev->isoc_ctl.last_line = line;
if ((last_line!=line)&&(last_line+1!=line) &&
(cmd != TM6000_URB_MSG_ERR) ) {
if (cmd != TM6000_URB_MSG_VIDEO) {
@@ -268,8 +253,15 @@ static int copy_packet(struct urb *urb, u32 header, u8 **ptr, u8 *endp,
(last_field != field) ) {
dev->isoc_ctl.nfields++;
if (dev->isoc_ctl.nfields >= 2)
if (dev->isoc_ctl.nfields>=2) {
dev->isoc_ctl.nfields=0;
/* Announces that a new buffer were filled */
buffer_filled (dev, dma_q, *buf);
dprintk(dev, V4L2_DEBUG_ISOC,
"new buffer filled\n");
rc=get_next_buf (dma_q, buf);
}
}
start_line=line;
@@ -278,6 +270,13 @@ static int copy_packet(struct urb *urb, u32 header, u8 **ptr, u8 *endp,
last_line=line;
pktsize = TM6000_URB_MSG_LEN;
} else {
/* Continue the last copy */
cmd = dev->isoc_ctl.cmd;
size= dev->isoc_ctl.size;
pos = dev->isoc_ctl.pos;
pktsize = dev->isoc_ctl.pktsize;
}
cpysize = (endp-(*ptr) > size) ? size : endp - *ptr;
@@ -286,15 +285,13 @@ static int copy_packet(struct urb *urb, u32 header, u8 **ptr, u8 *endp,
switch(cmd) {
case TM6000_URB_MSG_VIDEO:
/* Fills video buffer */
if (__copy_to_user(&out_p[pos], *ptr, cpysize) != 0)
tm6000_err("copy_to_user failed.\n");
memcpy(&out_p[pos], *ptr, cpysize);
break;
case TM6000_URB_MSG_PTS:
break;
case TM6000_URB_MSG_AUDIO:
/* Need some code to process audio */
printk(KERN_INFO "%ld: cmd=%s, size=%d\n", jiffies,
printk ("%ld: cmd=%s, size=%d\n", jiffies,
tm6000_msg_type[cmd],size);
break;
default:
@@ -302,7 +299,19 @@ static int copy_packet(struct urb *urb, u32 header, u8 **ptr, u8 *endp,
tm6000_msg_type[cmd],size);
}
}
if (cpysize<size) {
/* End of URB packet, but cmd processing is not
* complete. Preserve the state for a next packet
*/
dev->isoc_ctl.pos = pos+cpysize;
dev->isoc_ctl.size= size-cpysize;
dev->isoc_ctl.cmd = cmd;
dev->isoc_ctl.pktsize = pktsize-cpysize;
(*ptr)+=cpysize;
} else {
dev->isoc_ctl.cmd = 0;
(*ptr)+=pktsize;
}
return rc;
}
@@ -312,71 +321,55 @@ static int copy_streams(u8 *data, u8 *out_p, unsigned long len,
{
struct tm6000_dmaqueue *dma_q = urb->context;
struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
u8 *ptr, *endp;
u8 *ptr=data, *endp=data+len;
unsigned long header=0;
int rc = 0, size;
int rc=0;
/* Process pending data */
if (dev->isoc_ctl.pending) {
memcpy(dev->isoc_ctl.tbuf + dev->isoc_ctl.len, ptr,
sizeof(dev->isoc_ctl.tbuf) - dev->isoc_ctl.len);
/* Seek for sync */
endp = dev->isoc_ctl.tbuf + sizeof(dev->isoc_ctl.tbuf);
for (ptr = dev->isoc_ctl.tbuf; ptr < endp - 3; ptr++) {
if (*(ptr + 3) == 0x47)
for (ptr=data; ptr<endp;) {
if (!dev->isoc_ctl.cmd) {
u8 *p=(u8 *)&dev->isoc_ctl.tmp_buf;
/* FIXME: This seems very complex
* It just recovers up to 3 bytes of the header that
* might be at the previous packet
*/
if (dev->isoc_ctl.tmp_buf_len) {
while (dev->isoc_ctl.tmp_buf_len) {
if ( *(ptr+3-dev->isoc_ctl.tmp_buf_len) == 0x47) {
break;
}
header = *(unsigned long *)ptr;
size = (((header & 0x7e) << 1) - 1) * 4;
if (size > TM6000_URB_MSG_LEN)
size = TM6000_URB_MSG_LEN;
if (ptr + 3 + size >= endp) {
printk(KERN_ERR "tm6000: broken data\n");
ptr = data;
goto process_new_uri;
p++;
dev->isoc_ctl.tmp_buf_len--;
}
if (dev->isoc_ctl.tmp_buf_len) {
memcpy (&header,p,
dev->isoc_ctl.tmp_buf_len);
memcpy (((u8 *)header)+
dev->isoc_ctl.tmp_buf,
ptr,
4-dev->isoc_ctl.tmp_buf_len);
ptr+=4-dev->isoc_ctl.tmp_buf_len;
goto HEADER;
}
ptr += 4;
/* Copy or continue last copy */
rc = copy_packet(urb, header, &ptr, endp, out_p, buf);
if (rc < 0) {
buf = NULL;
printk(KERN_ERR "tm6000: buffer underrun at %ld\n",
jiffies);
return rc;
}
dev->isoc_ctl.pending = 0;
ptr = data + (ptr - dev->isoc_ctl.tbuf);
} else
ptr = data;
process_new_uri:
endp = data + len;
while (ptr < endp) {
if (!dev->isoc_ctl.pending) {
/* Seek for sync */
for (;ptr<endp-3;ptr++) {
if (*(ptr+3)==0x47)
break;
}
header = *(unsigned long *)ptr;
size = (((header & 0x7e) << 1) - 1) * 4;
if (size > TM6000_URB_MSG_LEN)
size = TM6000_URB_MSG_LEN;
if (ptr + 3 + size >= endp) {
int len = endp - ptr;
memcpy(dev->isoc_ctl.tbuf, ptr, len);
dev->isoc_ctl.len = len;
dev->isoc_ctl.pending = 1;
if (ptr+3>=endp) {
dev->isoc_ctl.tmp_buf_len=endp-ptr;
memcpy (&dev->isoc_ctl.tmp_buf,ptr,
dev->isoc_ctl.tmp_buf_len);
dev->isoc_ctl.cmd=0;
return rc;
}
/* Get message header */
header=*(unsigned long *)ptr;
ptr+=4;
}
HEADER:
/* Copy or continue last copy */
rc=copy_packet(urb,header,&ptr,endp,out_p,buf);
if (rc<0) {
@@ -402,10 +395,8 @@ static int copy_multiplexed(u8 *ptr, u8 *out_p, unsigned long len,
while (len>0) {
cpysize=min(len,(*buf)->vb.size-pos);
if (__copy_to_user(&out_p[pos], ptr, cpysize) != 0)
tm6000_err("copy_to_user failed.\n");
//printk("Copying %d bytes (max=%lu) from %p to %p[%u]\n",cpysize,(*buf)->vb.size,ptr,out_p,pos);
memcpy(&out_p[pos], ptr, cpysize);
pos+=cpysize;
ptr+=cpysize;
len-=cpysize;
@@ -426,7 +417,7 @@ static int copy_multiplexed(u8 *ptr, u8 *out_p, unsigned long len,
return rc;
}
static inline void print_err_status(struct tm6000_core *dev,
static void inline print_err_status (struct tm6000_core *dev,
int packet, int status)
{
char *errmsg = "Unknown";
@@ -461,8 +452,7 @@ static inline void print_err_status(struct tm6000_core *dev,
dprintk(dev, V4L2_DEBUG_QUEUE, "URB status %d [%s].\n",
status, errmsg);
} else {
dprintk(dev, V4L2_DEBUG_QUEUE,
"URB packet %d, status %d [%s].\n",
dprintk(dev, V4L2_DEBUG_QUEUE, "URB packet %d, status %d [%s].\n",
packet, status, errmsg);
}
}
@@ -479,7 +469,9 @@ static inline int tm6000_isoc_copy(struct urb *urb, struct tm6000_buffer **buf)
int i, len=0, rc=1;
int size=(*buf)->vb.size;
char *p;
unsigned long copied = 0;
unsigned long copied;
copied=0;
if (urb->status<0) {
print_err_status (dev,-1,urb->status);
@@ -496,18 +488,21 @@ static inline int tm6000_isoc_copy(struct urb *urb, struct tm6000_buffer **buf)
len=urb->iso_frame_desc[i].actual_length;
// if (len>=TM6000_URB_MSG_LEN) {
p=urb->transfer_buffer + urb->iso_frame_desc[i].offset;
if (!urb->iso_frame_desc[i].status) {
if (((*buf)->fmt->fourcc)==V4L2_PIX_FMT_TM6000) {
rc=copy_multiplexed(p,outp,len,urb,buf);
if (rc<=0)
return rc;
} else
} else {
copy_streams(p,outp,len,urb,buf);
}
}
copied += len;
if (copied>=size)
break;
// }
}
return rc;
}