diff options
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/ste_dma40.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index b630323fc905..cdbde5582e81 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -1840,6 +1840,8 @@ static int d40_allocate_channel(struct d40_chan *d40c, bool *first_phy_user) bool is_src; bool is_log = d40c->dma_cfg.mode == STEDMA40_MODE_LOGICAL; + dev_info(chan2dev(d40c), "ENTER %s\n", __func__); + phys = d40c->base->phy_res; num_phy_chans = d40c->base->num_phy_chans; @@ -1950,6 +1952,8 @@ out: else d40c->base->lookup_phy_chans[d40c->phy_chan->num] = d40c; + dev_info(chan2dev(d40c), "EXIT OK %s\n", __func__); + return 0; } @@ -1958,6 +1962,8 @@ static int d40_config_memcpy(struct d40_chan *d40c) { dma_cap_mask_t cap = d40c->chan.device->cap_mask; + dev_info(chan2dev(d40c), "ENTER %s\n", __func__); + if (dma_has_cap(DMA_MEMCPY, cap) && !dma_has_cap(DMA_SLAVE, cap)) { d40c->dma_cfg = dma40_memcpy_conf_log; d40c->dma_cfg.dev_type = dma40_memcpy_channels[d40c->chan.chan_id]; @@ -1977,10 +1983,12 @@ static int d40_config_memcpy(struct d40_chan *d40c) d40c->dst_def_cfg |= BIT(D40_SREG_CFG_EIM_POS); } else { - chan_err(d40c, "No memcpy\n"); + chan_err(d40c, "EXIT No memcpy\n"); return -EINVAL; } + dev_info(chan2dev(d40c), "EXIT OK %s\n", __func__); + return 0; } @@ -2273,6 +2281,7 @@ bool stedma40_filter(struct dma_chan *chan, void *data) int err; if (data) { + dev_info(chan2dev(d40c), "VALIDATE CONF %s\n", __func__); err = d40_validate_conf(d40c, info); if (!err) d40c->dma_cfg = *info; @@ -2355,17 +2364,25 @@ static struct dma_chan *d40_xlate(struct of_phandle_args *dma_spec, flags = dma_spec->args[2]; switch (D40_DT_FLAGS_MODE(flags)) { - case 0: cfg.mode = STEDMA40_MODE_LOGICAL; break; - case 1: cfg.mode = STEDMA40_MODE_PHYSICAL; break; + case 0: + cfg.mode = STEDMA40_MODE_LOGICAL; + pr_info("d40_xlate: logical channel device %d\n", cfg.dev_type); + break; + case 1: + cfg.mode = STEDMA40_MODE_PHYSICAL; + pr_info("d40_xlate: physical channel device %d\n", cfg.dev_type); + break; } switch (D40_DT_FLAGS_DIR(flags)) { case 0: cfg.dir = DMA_MEM_TO_DEV; + pr_info("d40_xlate: memory to device\n"); cfg.dst_info.big_endian = D40_DT_FLAGS_BIG_ENDIAN(flags); break; case 1: cfg.dir = DMA_DEV_TO_MEM; + pr_info("d40_xlate: device to memory\n"); cfg.src_info.big_endian = D40_DT_FLAGS_BIG_ENDIAN(flags); break; } @@ -2373,10 +2390,15 @@ static struct dma_chan *d40_xlate(struct of_phandle_args *dma_spec, if (D40_DT_FLAGS_FIXED_CHAN(flags)) { cfg.phy_channel = dma_spec->args[1]; cfg.use_fixed_channel = true; + pr_info("d40_xlate: use fixed physical channel %d\n", cfg.phy_channel); + } else { + pr_info("d40_xlate: use any channel, ignore arg %d\n", dma_spec->args[1]); } - if (D40_DT_FLAGS_HIGH_PRIO(flags)) + if (D40_DT_FLAGS_HIGH_PRIO(flags)) { + pr_info("d40_xlate: high prio channel\n"); cfg.high_priority = true; + } return dma_request_channel(cap, stedma40_filter, &cfg); } @@ -2389,6 +2411,9 @@ static int d40_alloc_chan_resources(struct dma_chan *chan) struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); bool is_free_phy; + + dev_info(chan2dev(d40c), "ENTER %s\n", __func__); + spin_lock_irqsave(&d40c->lock, flags); dma_cookie_init(chan); @@ -2444,6 +2469,7 @@ static int d40_alloc_chan_resources(struct dma_chan *chan) pm_runtime_mark_last_busy(d40c->base->dev); pm_runtime_put_autosuspend(d40c->base->dev); spin_unlock_irqrestore(&d40c->lock, flags); + dev_info(chan2dev(d40c), "EXIT %s %d\n", __func__, err); return err; } |