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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>
This commit is contained in:
Gerald Baeza 2012-11-08 14:39:07 +01:00 committed by Fabio Baltieri
parent ccc3d69764
commit f000df8c5a
1 changed files with 11 additions and 2 deletions
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13
drivers/dma/ste_dma40.c
View File

@ -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) {