diff options
| author | Gerald Baeza <gerald.baeza@stericsson.com> | 2012-11-08 14:39:07 +0100 |
|---|---|---|
| committer | Fabio Baltieri <fabio.baltieri@linaro.org> | 2013-01-14 10:50:40 +0100 |
| commit | f000df8c5a0e2002acc5989aad99a97d32a24718 (patch) | |
| tree | c8547aa62958e7d65b39d4ec1827efb9f31954f2 /drivers/dma/ste_dma40.c | |
| parent | ccc3d6976433aa67131117fccd2b5143d82a6f48 (diff) | |
| download | linux-f000df8c5a0e2002acc5989aad99a97d32a24718.tar.bz2 | |
dmaengine: ste_dma40: support fixed physical channel allocation
This patch makes existing use_fixed_channel field (of stedma40_chan_cfg
structure) applicable to physical channels.
Signed-off-by: Gerald Baeza <gerald.baeza@stericsson.com>
Tested-by: Yannick Fertre <yannick.fertre@stericsson.com>
Reviewed-by: Per Forlin <per.forlin@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Diffstat (limited to 'drivers/dma/ste_dma40.c')
| -rw-r--r-- | drivers/dma/ste_dma40.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index 9f8964a0a287..5feab7db9449 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -1711,10 +1711,12 @@ static int d40_allocate_channel(struct d40_chan *d40c, bool *first_phy_user) int i; int j; int log_num; + int num_phy_chans; bool is_src; bool is_log = d40c->dma_cfg.mode == STEDMA40_MODE_LOGICAL; phys = d40c->base->phy_res; + num_phy_chans = d40c->base->num_phy_chans; if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) { dev_type = d40c->dma_cfg.src_dev_type; @@ -1735,12 +1737,19 @@ static int d40_allocate_channel(struct d40_chan *d40c, bool *first_phy_user) if (!is_log) { if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM) { /* Find physical half channel */ - for (i = 0; i < d40c->base->num_phy_chans; i++) { - + if (d40c->dma_cfg.use_fixed_channel) { + i = d40c->dma_cfg.phy_channel; if (d40_alloc_mask_set(&phys[i], is_src, 0, is_log, first_phy_user)) goto found_phy; + } else { + for (i = 0; i < num_phy_chans; i++) { + if (d40_alloc_mask_set(&phys[i], is_src, + 0, is_log, + first_phy_user)) + goto found_phy; + } } } else for (j = 0; j < d40c->base->num_phy_chans; j += 8) { |