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Date: Fri, 28 Aug 2015 08:37:48 +0800 From: Shawn Lin <shawn.lin@...k-chips.com> To: Vinod Koul <vinod.koul@...el.com>, Heiko Stuebner <heiko@...ech.de> Cc: Boojin Kim <boojin.kim@...sung.com>, Doug Anderson <dianders@...omium.org>, Olof Johansson <olof@...om.net>, Sonny Rao <sonnyrao@...omium.org>, Addy Ke <addy.ke@...k-chips.com>, dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, Shawn Lin <shawn.lin@...k-chips.com> Subject: [PATCH v2 1/5] DMA: pl330: support burst mode for dev-to-mem and mem-to-dev transmit From: Boojin Kim <boojin.kim@...sung.com> This patch adds to support burst mode for dev-to-mem and mem-to-dev transmit. Signed-off-by: Boojin Kim <boojin.kim@...sung.com> Signed-off-by: Addy Ke <addy.ke@...k-chips.com> Signed-off-by: Shawn Lin <shawn.lin@...k-chips.com> cc: Heiko Stuebner <heiko@...ech.de> cc: Doug Anderson <dianders@...omium.org> cc: Olof Johansson <olof@...om.net> --- Changes in v2: - amend the author - amend Olof's mail address Changes in v1: - rename broken-no-flushp to "arm,pl330-broken-no-flushp" suggested by Krzysztof. - add From original author. - remove Sunny's tag drivers/dma/pl330.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index ecab4ea0..0d544d2 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -1141,10 +1141,13 @@ static inline int _ldst_devtomem(unsigned dry_run, u8 buf[], const struct _xfer_spec *pxs, int cyc) { int off = 0; + enum pl330_cond cond; + + cond = (pxs->desc->rqcfg.brst_len == 1) ? SINGLE : BURST; while (cyc--) { - off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri); - off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->desc->peri); + off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri); + off += _emit_LDP(dry_run, &buf[off], cond, pxs->desc->peri); off += _emit_ST(dry_run, &buf[off], ALWAYS); off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri); } @@ -1156,11 +1159,14 @@ static inline int _ldst_memtodev(unsigned dry_run, u8 buf[], const struct _xfer_spec *pxs, int cyc) { int off = 0; + enum pl330_cond cond; + + cond = (pxs->desc->rqcfg.brst_len == 1) ? SINGLE : BURST; while (cyc--) { - off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri); + off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri); off += _emit_LD(dry_run, &buf[off], ALWAYS); - off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->desc->peri); + off += _emit_STP(dry_run, &buf[off], cond, pxs->desc->peri); off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri); } @@ -2557,7 +2563,7 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic( desc->rqtype = direction; desc->rqcfg.brst_size = pch->burst_sz; - desc->rqcfg.brst_len = 1; + desc->rqcfg.brst_len = pch->burst_len; desc->bytes_requested = period_len; fill_px(&desc->px, dst, src, period_len); @@ -2702,7 +2708,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, } desc->rqcfg.brst_size = pch->burst_sz; - desc->rqcfg.brst_len = 1; + desc->rqcfg.brst_len = pch->burst_len; desc->rqtype = direction; desc->bytes_requested = sg_dma_len(sg); } -- 2.3.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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