On Dec 2, 2006, at 1:06 PM, Jelle wrote:
> Petter Gundersen wrote:
>> I have some info about the issue with high cpu usage while using the
>> pvr350 tv-out and mythtv.
>>
>> Earlier reports here:
>> http://www.gossamer-threads.com/lists/ivtv/users/32506#32506
>> http://www.gossamer-threads.com/lists/ivtv/users/32807#32807
>>
>> This started happening between ivtv 0.7.0 and 0.7.1, more precisely
>> changeset 3406 "Added workaround for the DMA 0x0000000b error...".
>>
>> I'm not sure if this is a ivtv bug, a myth bug, or if some of my
>> kernel settings are messing things up. Since I never have had any
>> problems with the DMA 0x0000000b error, I use the attached patch with
>> ivtv 0.8.1, and my cpu usage is back to it's normal ~1%. The patch
>> reverts changeset 3413, 3407 and parts of 3400.
>
> I'll second that. I had very high CPU usage on the pvr350 too recently
> (head branch 0.8 on 2.6.18), but I thought it was somehow caused by
> xorg7.1, but your patch brings it back to normal.
And here I thought it was MythTV. Fixes it for me on 0.9 as well.
- Rick
> Thanks.
>
> Jelle.
>
>>
>> Regards,
>> Petter
>>
>>
>> ---------------------------------------------------------------------
>> ---
>>
>> diff -ur ivtv-0.8.1.orig/driver/ivtv-driver.h ivtv-0.8.1/driver/
>> ivtv-driver.h
>> --- ivtv-0.8.1.orig/driver/ivtv-driver.h 2006-11-19
>> 13:07:58.000000000 +0100
>> +++ ivtv-0.8.1/driver/ivtv-driver.h 2006-12-01 16:48:38.000000000
>> +0100
>> @@ -691,8 +691,6 @@
>>
>> /* Buffer Stats */
>> atomic_t allocated_buffers;
>> - u32 buf_backup;
>> - u32 last_offset;
>> int buffers;
>> u32 buf_min;
>> int bufsize;
>> diff -ur ivtv-0.8.1.orig/driver/ivtv-irq.c ivtv-0.8.1/driver/ivtv-
>> irq.c
>> --- ivtv-0.8.1.orig/driver/ivtv-irq.c 2006-09-25
>> 11:31:57.000000000 +0200
>> +++ ivtv-0.8.1/driver/ivtv-irq.c 2006-12-01 16:48:38.000000000 +0100
>> @@ -29,7 +29,7 @@
>>
>> typedef unsigned long uintptr_t;
>>
>> -static void ivtv_FROM_DMA_done(struct ivtv *itv, int type, void
>> *src);
>> +static void ivtv_FROM_DMA_done(struct ivtv *itv, int type);
>> static int dma_from_device(struct ivtv *itv, struct ivtv_stream
>> *st);
>>
>> IRQRETURN_T ivtv_irq_handler(int irq, void *dev_id, struct
>> pt_regs *regs)
>> @@ -70,7 +70,7 @@
>>
>> /* Exclude 0x400 from the output, otherwise the log is flooded with
>> these messages */
>> - if (combo & ~(0x88000400))
>> + if (combo != 0x400)
>> IVTV_DEBUG_IRQ("======= valid IRQ bits: 0x%08x ======\n",
>> combo);
>>
>> if (combo & IVTV_IRQ_DEC_VBI_RE_INSERT2) {
>> @@ -101,13 +101,14 @@
>> wake_up(&itv->r_intr_wq);
>> }
>> if (combo & IVTV_IRQ_ENC_DMA_COMPLETE) {
>> - //IVTV_DEBUG_IRQ("IRQ: IVTV_IRQ_ENC_DMA_COMPLETE\n");
>> + IVTV_DEBUG_IRQ("IRQ: IVTV_IRQ_ENC_DMA_COMPLETE\n");
>> atomic_set(&itv->w_intr, 1);
>> wake_up(&itv->w_intr_wq);
>> }
>> if (combo & IVTV_IRQ_DMA_ERR) {
>> - atomic_set(&itv->w_intr, 1);
>> - wake_up(&itv->w_intr_wq);
>> + IVTV_DEBUG_WARN(
>> + "IRQ: IVTV_IRQ_DEC_DMA_ERR\n");
>> + writel(0x0, itv->reg_mem + IVTV_REG_DMAXFER);
>> }
>>
>> /* Define irq bits */
>> @@ -120,7 +121,7 @@
>>
>> if (combo & IVTV_IRQ_ENC_DMA) {
>> if (combo & IVTV_IRQ_ENC_START_CAP) {
>> - //IVTV_DEBUG_IRQ("IRQ ENC DMA\n");
>> + IVTV_DEBUG_IRQ("IRQ ENC DMA\n");
>>
>> /* set dma needed flag */
>> set_bit(IVTV_F_T_ENC_DMA_NEEDED, &itv->t_flags);
>> @@ -267,13 +268,11 @@
>> return IRQ_HANDLED;
>> }
>>
>> -static void ivtv_FROM_DMA_done(struct ivtv *itv, int stmtype,
>> void *src)
>> +static void ivtv_FROM_DMA_done(struct ivtv *itv, int stmtype)
>> {
>> struct ivtv_stream *stream = NULL;
>> struct ivtv_buffer *buf;
>> int freed = 0;
>> - int x = 0;
>> - int offset = 0;
>>
>> IVTV_DEBUG_DMA("ENC: DMA Done\n");
>>
>> @@ -284,43 +283,13 @@
>> /* Sync Buffer */
>> #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 8)
>> pci_dma_sync_single_for_cpu((struct pci_dev *)itv->dev,
>> - buf->dma_handle, buf->buffer.length
>> + 256,
>> + buf->dma_handle, buf->buffer.length,
>> stream->dma);
>> #else
>> pci_dma_sync_single(itv->dev, buf->dma_handle,
>> - buf->buffer.length + 256, stream->dma);
>> + buf->buffer.length, stream->dma);
>> #endif /* LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 8) */
>>
>> - if (x == 0) {
>> - offset = stream->last_offset;
>> - if (((u32 *)(buf->buffer.m.userptr))[offset / 4] !=
>> 0x000001fe) {
>> - for (offset = 0; offset < 64; offset++) {
>> - if (((u32
>> *)(buf->buffer.m.userptr))[offset] == 0x000001fe) {
>> - break;
>> - }
>> - }
>> - offset *= 4;
>> - if (offset == 256) {
>> - IVTV_DEBUG_WARN("Couldn't find start of
>> buffer within the
>> first 256 bytes\n");
>> - offset = 0;
>> - }
>> - if (stream->last_offset != offset)
>> - IVTV_DEBUG_WARN("offset %d -> %d\n",
>> stream->last_offset,
>> offset);
>> - stream->last_offset = offset;
>> - }
>> - writel(0, src);
>> - if (offset) {
>> - buf->buffer.bytesused -= offset;
>> - memcpy((void *)buf->buffer.m.userptr,
>> - (void *)(buf->buffer.m.userptr +
>> offset),
>> - buf->buffer.bytesused + offset);
>> - }
>> - *(u32 *)(buf->buffer.m.userptr) = stream->buf_backup;
>> - }
>> - if (list_empty(&stream->dma_q.list)) {
>> - buf->buffer.bytesused += stream->last_offset;
>> - }
>> - x++;
>> /* flag byteswap ABCD -> DCBA for MPG & VBI data outside irq */
>> if (stmtype == IVTV_ENC_STREAM_TYPE_MPG)
>> set_bit(IVTV_F_B_NEED_BUF_SWAP, &buf->b_flags);
>> @@ -360,17 +329,17 @@
>> void ivtv_sched_DMA(struct ivtv *itv)
>> {
>> u32 data[CX2341X_MBOX_MAX_DATA], result;
>> - u32 type, size, offset, streamtype;
>> + u32 type, size, offset, streamtype, pad = 0;
>> u32 UVsize = 0, UVoffset = 0;
>> u64 pts_stamp = 0;
>> struct ivtv_stream *st;
>> int x;
>> - void *src = (void *)itv->enc_mem;
>> int uvflag = 0;
>> long sequence;
>> u32 bytes_needed = 0, bytes_read = 0, bytes_received = 0;
>> struct ivtv_buffer *buf;
>> LIST_HEAD(free_list);
>> + int xfer_pad;
>> unsigned long then;
>> DECLARE_WAITQUEUE(wait, current);
>> int rc = 0;
>> @@ -433,11 +402,10 @@
>> case 2: /* PCM (audio) */
>> offset = data[1] + 12;
>> size = data[2] - 12;
>> - pts_stamp = readl(itv->dec_mem + offset - 8);
>> + pts_stamp = *(u32 *) (itv->dec_mem + offset - 8);
>> pts_stamp |=
>> - (u64) (readl(itv->dec_mem + offset - 12)) << 32;
>> + (u64) (*(u32 *) (itv->dec_mem + offset - 12)) << 32;
>> offset += IVTV_DECODER_OFFSET;
>> - src = (void *)(itv->dec_mem - IVTV_DECODER_OFFSET);
>> IVTV_DEBUG_INFO(
>> "DMA/PCM type 0x%08x,size 0x%08x,offset 0x%08x "
>> "PTS 0x%09llx\n", type, size, offset, pts_stamp);
>> @@ -553,9 +521,6 @@
>> sequence = ++st->seq;
>>
>> st->ubytes = size;
>> - src += offset;
>> - st->buf_backup = readl(src);
>> - writel(0x000001fe, src);
>>
>> for (x = 0; bytes_read < bytes_needed; x++) {
>> /* extract the buffers we procured earlier */
>> @@ -571,10 +536,18 @@
>> bytes_read += buf->buffer.length;
>>
>> if (size < buf->buffer.length) {
>> + xfer_pad = buf->buffer.length /*256 */ ;
>> + pad = size;
>> buf->buffer.bytesused = size;
>> - st->SGarray[x].size = buf->buffer.length;
>> + if (size > xfer_pad && size % xfer_pad) /* Align */
>> + size = size + (size % xfer_pad);
>> + if (size < xfer_pad) /* Too small */
>> + size = xfer_pad;
>> + st->SGarray[x].size = size;
>> size = 0;
>> +
>> } else {
>> + pad = 0;
>> buf->buffer.bytesused = buf->buffer.length;
>> st->SGarray[x].size = buf->buffer.length;
>> size -= st->SGarray[x].size;
>> @@ -594,11 +567,11 @@
>> /* Sync SG buffers */
>> pci_dma_sync_single_for_device((struct pci_dev *)itv->dev,
>> buf->dma_handle,
>> - buf->buffer.length + 256,
>> st->dma);
>> + buf->buffer.length, st->dma);
>> #else
>> /* Sync SG buffers */
>> pci_dma_sync_single(itv->dev, buf->dma_handle,
>> - buf->buffer.length + 256, st->dma);
>> + buf->buffer.length, st->dma);
>> #endif /* LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 8) */
>>
>> ivtv_enq_buf_nolock(&st->dma_q, buf);
>> @@ -611,7 +584,6 @@
>> }
>> }
>> st->SG_length = x;
>> - st->SGarray[x - 1].size += 256;
>>
>> /* This should wrap gracefully */
>> st->trans_id++;
>> @@ -642,7 +614,7 @@
>> ivtv_vapi(itv, CX2341X_ENC_SCHED_DMA_TO_HOST, 3, 0, 0,
>> st->type);
>>
>> /* Gather Buffers from DMA xfer to read */
>> - ivtv_FROM_DMA_done(itv, st->type, src);
>> + ivtv_FROM_DMA_done(itv, st->type);
>> } else {
>> //down(&itv->DMA_lock);
>> if (dma_from_device(itv, st) != 0) {
>> @@ -651,7 +623,7 @@
>> //up(&itv->DMA_lock);
>>
>> /* Gather Buffers from DMA xfer to read */
>> - ivtv_FROM_DMA_done(itv, st->type, src);
>> + ivtv_FROM_DMA_done(itv, st->type);
>> }
>>
>> clear_bit(IVTV_F_S_DMAP, &st->s_flags);
>> @@ -665,15 +637,14 @@
>> unsigned long flags;
>> int redo_dma = 0;
>> int ret = 0;
>> - int err;
>> + int sg_offset;
>>
>> /* wait for DMA complete status */
>> then = jiffies;
>> - if (1)
>> while (!(readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x03)) {
>> ivtv_sleep_timeout(HZ / 100, 1);
>> - if ((jiffies - then) > (HZ * 1)) {
>> - IVTV_DEBUG_WARN("ENC: REG_DMASTATUS 1 wait failed\n");
>> + if ((jiffies - then) > (HZ * 3)) {
>> + IVTV_DEBUG_WARN("ENC: REG_DMASTATUS wait failed\n");
>> break;
>> }
>> }
>> @@ -682,14 +653,14 @@
>> then = jiffies;
>> while ((readl(itv->reg_mem + IVTV_REG_DMAXFER) & 0x03)) {
>> ivtv_sleep_timeout(HZ / 100, 1);
>> - if ((jiffies - then) > (HZ * 1)) {
>> - IVTV_DEBUG_WARN("ENC: REG_DMAXFER 1 wait failed\n");
>> + if ((jiffies - then) > (HZ * 3)) {
>> + IVTV_DEBUG_WARN("ENC: REG_DMAXFER wait failed\n");
>> break;
>> }
>> }
>>
>> -redo_dma:
>> - err = 0;
>> + redo_dma:
>> +
>> spin_lock_irqsave(&itv->DMA_slock, flags);
>> /* put SG Handle into register 0x0c */
>> ivtv_write_reg(st->SG_handle, itv->reg_mem + IVTV_REG_ENCDMAADDR);
>> @@ -703,36 +674,49 @@
>> ivtv_write_reg(readl(itv->reg_mem + IVTV_REG_DMAXFER) |
>> 0x02, itv->reg_mem + IVTV_REG_DMAXFER);
>> }
>> - else {
>> - err = 1;
>> - }
>> spin_unlock_irqrestore(&itv->DMA_slock, flags);
>>
>> /* wait for DMA to start */
>> then = jiffies;
>> -
>> - while (!err && (readl(itv->reg_mem + IVTV_REG_DMAXFER) & 0x02)) {
>> - u32 stat = readl(itv->reg_mem + IVTV_REG_DMASTATUS);
>> + while ((readl(itv->reg_mem + IVTV_REG_DMAXFER) & 0x02)) {
>> /* DMA Error */
>> - if (stat & 0x1a)
>> + if (readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x1A) {
>> break;
>> + }
>>
>> - //ivtv_sleep_timeout(HZ / 100, 1);
>> - if ((jiffies - then) > (HZ / 5)) {
>> + ivtv_sleep_timeout(HZ / 100, 1);
>> + if ((jiffies - then) > (HZ * 3)) {
>> IVTV_DEBUG_WARN("ENC: REG_DMAXFER 2 wait failed\n");
>> - err = 1;
>> + break;
>> + }
>> + }
>> +
>> + /* wait for DMA to be finished, check interrupt bit */
>> + if (st->SG_length <= 8)
>> + sg_offset = ((12 * st->SG_length) - 4);
>> + else
>> + sg_offset = ((12 * (st->SG_length % 8)) - 4);
>> + then = jiffies;
>> + while (!(readl(itv->reg_mem +
>> + IVTV_REG_ENCSG1SRC + sg_offset) & 0x80000000)) {
>> + /* DMA Error */
>> + if (readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x1A)
>> + break;
>> +
>> + ivtv_sleep_timeout(HZ / 100, 1);
>> + if ((jiffies - then) > (HZ * 3)) {
>> + IVTV_DEBUG_WARN("DEC: REG_ENCSG1LEN wait failed\n");
>> break;
>> }
>> }
>>
>> /* Wait for Write Interrupt */
>> - while (!err && !(readl(itv->reg_mem + IVTV_REG_DMASTATUS) &
>> 0x1a) &&
>> + while (!(readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x1A) &&
>> wait_event_interruptible(itv->w_intr_wq,
>> atomic_read(&itv->w_intr))) {
>> /* DMA Error */
>> - if (readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x1a) {
>> + if (readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x1A)
>> break;
>> - }
>>
>> if (atomic_read(&itv->w_intr))
>> break;
>> @@ -742,27 +726,24 @@
>>
>> /* wait for DMA complete status */
>> then = jiffies;
>> -
>> - while (!err && !(readl(itv->reg_mem + IVTV_REG_DMASTATUS) &
>> 0x02)) {
>> + while (!(readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x02)) {
>> /* DMA Error */
>> - if (readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x18) {
>> + if (readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x1A) {
>> break;
>> }
>>
>> ivtv_sleep_timeout(HZ / 100, 1);
>> - if ((jiffies - then) > (HZ / 50)) {
>> - err = 1;
>> - IVTV_DEBUG_WARN("ENC: REG_DMASTATUS 2 wait failed\n");
>> + if ((jiffies - then) > (HZ * 3)) {
>> + IVTV_DEBUG_WARN("ENC: REG_DMASTATUS2 wait failed\n");
>> break;
>> }
>> }
>>
>> /* DMA Error */
>> - if (err || (readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x18)) {
>> - IVTV_DEBUG_WARN("ENC: (%d) DMA Error 0x%08x %08x\n",
>> + if ((readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x18)) {
>> + IVTV_DEBUG_WARN("ENC: (%d) DMA Error 0x%08x\n",
>> redo_dma, readl(itv->reg_mem +
>> - IVTV_REG_DMASTATUS),
>> - readl(itv->reg_mem + IVTV_REG_IRQSTATUS));
>> + IVTV_REG_DMASTATUS));
>>
>> /* Reset DMA Error, cancel last DMA? */
>> spin_lock_irqsave(&itv->DMA_slock, flags);
>> @@ -777,6 +758,7 @@
>> IVTV_DEBUG_WARN("ENC: REDO DMA took too many tries.\n");
>> ret = -ENOMEM;
>> }
>> +
>> return ret;
>> }
>>
>> @@ -786,7 +768,6 @@
>> u64 pts_stamp;
>> struct ivtv_stream *st;
>> int x;
>> - void *src;
>> struct ivtv_buffer *buf = 0;
>> LIST_HEAD(free_list);
>> long sequence;
>> @@ -818,7 +799,6 @@
>> itv->vbi_frame += itv->vbi_fpi;
>> size = itv->vbi_enc_size * itv->vbi_fpi;
>> offset = bufptr;
>> - src = (void *)(itv->enc_mem + offset);
>>
>> IVTV_DEBUG_DMA(
>> "VBI(%d) BufPTR: 0x%08x offset 0x%08x size 0x%08x\n",
>> @@ -840,7 +820,6 @@
>> pio_mode = 1; /* Seems DMA mode has errors */
>> offset = readl(itv->dec_mem + itv->vbi_dec_start);
>> offset += itv->vbi_dec_start;
>> - src = (void *)(itv->dec_mem + offset);
>> size = readl(itv->dec_mem + itv->vbi_dec_start + 4);
>> size += 8;
>> pts_stamp = 0;
>> @@ -938,8 +917,6 @@
>> sequence = ++st->seq;
>>
>> st->ubytes = bytes_received;
>> - st->buf_backup = readl(src);
>> - writel(0x000001fe, src);
>>
>> for (x = 0; bytes_read < bytes_received; x++) {
>> /* extract the buffers we procured earlier */
>> @@ -992,11 +969,11 @@
>> /* Sync SG buffers */
>> pci_dma_sync_single_for_device((struct pci_dev *)itv->dev,
>> buf->dma_handle,
>> - buf->buffer.length + 256,
>> st->dma);
>> + buf->buffer.length, st->dma);
>> #else
>> /* Sync SG buffers */
>> pci_dma_sync_single(itv->dev, buf->dma_handle,
>> - buf->buffer.length + 256, st->dma);
>> + buf->buffer.length, st->dma);
>> #endif /* LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 8) */
>>
>> ivtv_enq_buf_nolock(&st->dma_q, buf);
>> @@ -1030,7 +1007,7 @@
>>
>> if (pio_mode) {
>> /* Gather Buffers from DMA xfer to read */
>> - ivtv_FROM_DMA_done(itv, st->type, src);
>> + ivtv_FROM_DMA_done(itv, st->type);
>> } else {
>> //down(&itv->DMA_lock);
>> if (dma_from_device(itv, st) != 0) {
>> @@ -1038,7 +1015,7 @@
>> }
>> //up(&itv->DMA_lock);
>>
>> - ivtv_FROM_DMA_done(itv, st->type, src);
>> + ivtv_FROM_DMA_done(itv, st->type);
>> }
>>
>> clear_bit(IVTV_F_S_DMAP, &st->s_flags);
>> diff -ur ivtv-0.8.1.orig/driver/ivtv-queue.c ivtv-0.8.1/driver/
>> ivtv-queue.c
>> --- ivtv-0.8.1.orig/driver/ivtv-queue.c 2006-11-19
>> 13:07:58.000000000 +0100
>> +++ ivtv-0.8.1/driver/ivtv-queue.c 2006-12-01 16:48:38.000000000
>> +0100
>> @@ -127,7 +127,7 @@
>> /* UnMap Buffer */
>> if (st->dma != PCI_DMA_NONE) {
>> pci_unmap_single(itv->dev, item->dma_handle,
>> - item->buffer.length + 256, st->dma);
>> + item->buffer.length, st->dma);
>> }
>>
>> kfree((void *)item->buffer.m.userptr);
>> @@ -237,7 +237,7 @@
>> IVTV_DEBUG_WARN("No memory on ivtv_buffer alloc!\n");
>> return NULL;
>> }
>> - buf->buffer.m.userptr = (unsigned long)kmalloc(st->bufsize+256,
>> GFP_KERNEL);
>> + buf->buffer.m.userptr = (unsigned long)kmalloc(st->bufsize,
>> GFP_KERNEL);
>>
>> if (buf->buffer.m.userptr == 0) {
>> kfree(buf);
>> @@ -288,7 +288,7 @@
>> if (st->dma != PCI_DMA_NONE) {
>> buf->dma_handle = pci_map_single(itv->dev,
>> (void *)buf->buffer.m.userptr,
>> - buf->buffer.length + 256,
>> st->dma);
>> + buf->buffer.length, st->dma);
>> }
>>
>> return buf;
>> @@ -839,7 +839,6 @@
>> int ret = 0;
>> /* wait for DMA complete status */
>> then = jiffies;
>> - if (1)
>> while (!(readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x03)) {
>> ivtv_sleep_timeout(HZ / 100, 1);
>> if ((jiffies - then) > (HZ * 3)) {
>> @@ -853,7 +852,7 @@
>> then = jiffies;
>> while ((readl(itv->reg_mem + IVTV_REG_DMAXFER) & 0x03)) {
>> ivtv_sleep_timeout(HZ / 100, 1);
>> - if ((jiffies - then) > (HZ / 5)) {
>> + if ((jiffies - then) > (HZ * 3)) {
>> IVTV_DEBUG_WARN(
>> "DMA_TO: REG_DMAXFER wait failed\n");
>> break;
>> @@ -884,21 +883,33 @@
>>
>> /* wait for DMA to start */
>> then = jiffies;
>> -
>> while ((readl(itv->reg_mem + IVTV_REG_DMAXFER) & 0x01)) {
>> /* DMA Error */
>> if (readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x15) {
>> break;
>> }
>>
>> - //ivtv_sleep_timeout(HZ / 100, 1);
>> - if ((jiffies - then) > (HZ /5)) {
>> + ivtv_sleep_timeout(HZ / 100, 1);
>> + if ((jiffies - then) > (HZ * 3)) {
>> IVTV_DEBUG_WARN(
>> "DMA_TO: REG_DMAXFER 2 wait failed\n");
>> break;
>> }
>> }
>>
>> + then = jiffies;
>> + while (!(readl(itv->reg_mem + IVTV_REG_DECSG1LEN) & 0x80000000)) {
>> + /* DMA Error */
>> + if (readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x15)
>> + break;
>> +
>> + ivtv_sleep_timeout(HZ / 100, 1);
>> + if ((jiffies - then) > (HZ * 3)) {
>> + IVTV_DEBUG_WARN(
>> + "DEC: REG_DECSG1LEN wait failed\n");
>> + break;
>> + }
>> + }
>> /* Wait for Read Interrupt */
>> while (!(readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x15) &&
>> wait_event_interruptible(itv->r_intr_wq,
>> @@ -913,7 +924,6 @@
>> atomic_set(&itv->r_intr, 0);
>> /* wait for DMA complete status */
>> then = jiffies;
>> -
>> while (!(readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x01)) {
>> /* DMA Error */
>> if (readl(itv->reg_mem + IVTV_REG_DMASTATUS) & 0x15) {
>>
>>
>> ---------------------------------------------------------------------
>> ---
>>
>> _______________________________________________
>> ivtv-devel mailing list
>> [email protected]
>> http://ivtvdriver.org/mailman/listinfo/ivtv-devel
>
> _______________________________________________
> ivtv-devel mailing list
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> http://ivtvdriver.org/mailman/listinfo/ivtv-devel
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