Commit 28b1fae5 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma

Pull slave-dmaengine fixes from Vinod Koul:
 "We have two small fixes.  First one from Daniel to handle 0-length
  packets for usb cppi dma.  Second by Russell for imx-sdam cyclic
  residue reporting"

* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
  Update imx-sdma cyclic handling to report residue
  dma: cppi41: handle 0-length packets
parents 6b458ac1 d1a792f3
......@@ -86,6 +86,9 @@
#define USBSS_IRQ_PD_COMP (1 << 2)
/* Packet Descriptor */
#define PD2_ZERO_LENGTH (1 << 19)
struct cppi41_channel {
struct dma_chan chan;
struct dma_async_tx_descriptor txd;
......@@ -307,7 +310,7 @@ static irqreturn_t cppi41_irq(int irq, void *data)
__iormb();
while (val) {
u32 desc;
u32 desc, len;
q_num = __fls(val);
val &= ~(1 << q_num);
......@@ -319,9 +322,13 @@ static irqreturn_t cppi41_irq(int irq, void *data)
q_num, desc);
continue;
}
c->residue = pd_trans_len(c->desc->pd6) -
pd_trans_len(c->desc->pd0);
if (c->desc->pd2 & PD2_ZERO_LENGTH)
len = 0;
else
len = pd_trans_len(c->desc->pd0);
c->residue = pd_trans_len(c->desc->pd6) - len;
dma_cookie_complete(&c->txd);
c->txd.callback(c->txd.callback_param);
}
......
......@@ -255,6 +255,7 @@ struct sdma_channel {
enum dma_slave_buswidth word_size;
unsigned int buf_tail;
unsigned int num_bd;
unsigned int period_len;
struct sdma_buffer_descriptor *bd;
dma_addr_t bd_phys;
unsigned int pc_from_device, pc_to_device;
......@@ -592,6 +593,12 @@ static void sdma_event_disable(struct sdma_channel *sdmac, unsigned int event)
}
static void sdma_handle_channel_loop(struct sdma_channel *sdmac)
{
if (sdmac->desc.callback)
sdmac->desc.callback(sdmac->desc.callback_param);
}
static void sdma_update_channel_loop(struct sdma_channel *sdmac)
{
struct sdma_buffer_descriptor *bd;
......@@ -611,9 +618,6 @@ static void sdma_handle_channel_loop(struct sdma_channel *sdmac)
bd->mode.status |= BD_DONE;
sdmac->buf_tail++;
sdmac->buf_tail %= sdmac->num_bd;
if (sdmac->desc.callback)
sdmac->desc.callback(sdmac->desc.callback_param);
}
}
......@@ -669,6 +673,9 @@ static irqreturn_t sdma_int_handler(int irq, void *dev_id)
int channel = fls(stat) - 1;
struct sdma_channel *sdmac = &sdma->channel[channel];
if (sdmac->flags & IMX_DMA_SG_LOOP)
sdma_update_channel_loop(sdmac);
tasklet_schedule(&sdmac->tasklet);
__clear_bit(channel, &stat);
......@@ -1129,6 +1136,7 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
sdmac->status = DMA_IN_PROGRESS;
sdmac->buf_tail = 0;
sdmac->period_len = period_len;
sdmac->flags |= IMX_DMA_SG_LOOP;
sdmac->direction = direction;
......@@ -1225,9 +1233,15 @@ static enum dma_status sdma_tx_status(struct dma_chan *chan,
struct dma_tx_state *txstate)
{
struct sdma_channel *sdmac = to_sdma_chan(chan);
u32 residue;
if (sdmac->flags & IMX_DMA_SG_LOOP)
residue = (sdmac->num_bd - sdmac->buf_tail) * sdmac->period_len;
else
residue = sdmac->chn_count - sdmac->chn_real_count;
dma_set_tx_state(txstate, chan->completed_cookie, chan->cookie,
sdmac->chn_count - sdmac->chn_real_count);
residue);
return sdmac->status;
}
......
......@@ -59,7 +59,6 @@ int imx_pcm_dma_init(struct platform_device *pdev)
{
return devm_snd_dmaengine_pcm_register(&pdev->dev,
&imx_dmaengine_pcm_config,
SND_DMAENGINE_PCM_FLAG_NO_RESIDUE |
SND_DMAENGINE_PCM_FLAG_COMPAT);
}
EXPORT_SYMBOL_GPL(imx_pcm_dma_init);
......
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