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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>
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1 changed files with 11 additions and 2 deletions
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@ -1711,10 +1711,12 @@ static int d40_allocate_channel(struct d40_chan *d40c, bool *first_phy_user)
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int i;
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int j;
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int log_num;
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int num_phy_chans;
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bool is_src;
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bool is_log = d40c->dma_cfg.mode == STEDMA40_MODE_LOGICAL;
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phys = d40c->base->phy_res;
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num_phy_chans = d40c->base->num_phy_chans;
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if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) {
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dev_type = d40c->dma_cfg.src_dev_type;
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@ -1735,12 +1737,19 @@ static int d40_allocate_channel(struct d40_chan *d40c, bool *first_phy_user)
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if (!is_log) {
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if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM) {
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/* Find physical half channel */
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for (i = 0; i < d40c->base->num_phy_chans; i++) {
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if (d40c->dma_cfg.use_fixed_channel) {
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i = d40c->dma_cfg.phy_channel;
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if (d40_alloc_mask_set(&phys[i], is_src,
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0, is_log,
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first_phy_user))
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goto found_phy;
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} else {
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for (i = 0; i < num_phy_chans; i++) {
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if (d40_alloc_mask_set(&phys[i], is_src,
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0, is_log,
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first_phy_user))
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goto found_phy;
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}
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}
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} else
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for (j = 0; j < d40c->base->num_phy_chans; j += 8) {
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