diff options
Diffstat (limited to 'drivers/dma/pl330.c')
| -rw-r--r-- | drivers/dma/pl330.c | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 030fe05ed43b..740bbb942594 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -448,6 +448,9 @@ struct dma_pl330_chan { /* for cyclic capability */ bool cyclic; + + /* for runtime pm tracking */ + bool active; }; struct pl330_dmac { @@ -570,7 +573,8 @@ static inline u32 _emit_ADDH(unsigned dry_run, u8 buf[], buf[0] = CMD_DMAADDH; buf[0] |= (da << 1); - *((__le16 *)&buf[1]) = cpu_to_le16(val); + buf[1] = val; + buf[2] = val >> 8; PL330_DBGCMD_DUMP(SZ_DMAADDH, "\tDMAADDH %s %u\n", da == 1 ? "DA" : "SA", val); @@ -724,7 +728,10 @@ static inline u32 _emit_MOV(unsigned dry_run, u8 buf[], buf[0] = CMD_DMAMOV; buf[1] = dst; - *((__le32 *)&buf[2]) = cpu_to_le32(val); + buf[2] = val; + buf[3] = val >> 8; + buf[4] = val >> 16; + buf[5] = val >> 24; PL330_DBGCMD_DUMP(SZ_DMAMOV, "\tDMAMOV %s 0x%x\n", dst == SAR ? "SAR" : (dst == DAR ? "DAR" : "CCR"), val); @@ -899,10 +906,11 @@ static inline u32 _emit_GO(unsigned dry_run, u8 buf[], buf[0] = CMD_DMAGO; buf[0] |= (ns << 1); - buf[1] = chan & 0x7; - - *((__le32 *)&buf[2]) = cpu_to_le32(addr); + buf[2] = addr; + buf[3] = addr >> 8; + buf[4] = addr >> 16; + buf[5] = addr >> 24; return SZ_DMAGO; } @@ -1883,11 +1891,8 @@ static int dmac_alloc_resources(struct pl330_dmac *pl330) static int pl330_add(struct pl330_dmac *pl330) { - void __iomem *regs; int i, ret; - regs = pl330->base; - /* Check if we can handle this DMAC */ if ((pl330->pcfg.periph_id & 0xfffff) != PERIPH_ID_VAL) { dev_err(pl330->ddma.dev, "PERIPH_ID 0x%x !\n", @@ -2031,6 +2036,7 @@ static void pl330_tasklet(unsigned long data) _stop(pch->thread); spin_unlock(&pch->thread->dmac->lock); power_down = true; + pch->active = false; } else { /* Make sure the PL330 Channel thread is active */ spin_lock(&pch->thread->dmac->lock); @@ -2050,6 +2056,7 @@ static void pl330_tasklet(unsigned long data) desc->status = PREP; list_move_tail(&desc->node, &pch->work_list); if (power_down) { + pch->active = true; spin_lock(&pch->thread->dmac->lock); _start(pch->thread); spin_unlock(&pch->thread->dmac->lock); @@ -2164,6 +2171,7 @@ static int pl330_terminate_all(struct dma_chan *chan) unsigned long flags; struct pl330_dmac *pl330 = pch->dmac; LIST_HEAD(list); + bool power_down = false; pm_runtime_get_sync(pl330->ddma.dev); spin_lock_irqsave(&pch->lock, flags); @@ -2174,6 +2182,8 @@ static int pl330_terminate_all(struct dma_chan *chan) pch->thread->req[0].desc = NULL; pch->thread->req[1].desc = NULL; pch->thread->req_running = -1; + power_down = pch->active; + pch->active = false; /* Mark all desc done */ list_for_each_entry(desc, &pch->submitted_list, node) { @@ -2191,6 +2201,8 @@ static int pl330_terminate_all(struct dma_chan *chan) list_splice_tail_init(&pch->completed_list, &pl330->desc_pool); spin_unlock_irqrestore(&pch->lock, flags); pm_runtime_mark_last_busy(pl330->ddma.dev); + if (power_down) + pm_runtime_put_autosuspend(pl330->ddma.dev); pm_runtime_put_autosuspend(pl330->ddma.dev); return 0; @@ -2263,6 +2275,11 @@ static int pl330_get_current_xferred_count(struct dma_pl330_chan *pch, } pm_runtime_mark_last_busy(pch->dmac->ddma.dev); pm_runtime_put_autosuspend(pl330->ddma.dev); + + /* If DMAMOV hasn't finished yet, SAR/DAR can be zero */ + if (!val) + return 0; + return val - addr; } @@ -2350,6 +2367,7 @@ static void pl330_issue_pending(struct dma_chan *chan) * updated on work_list emptiness status. */ WARN_ON(list_empty(&pch->submitted_list)); + pch->active = true; pm_runtime_get_sync(pch->dmac->ddma.dev); } list_splice_tail_init(&pch->submitted_list, &pch->work_list); |