On Tue, Sep 12, 2017 at 01:44:21PM +0300, Peter Ujfalusi wrote: > Set the device's max_burst to 16777215 (EN is 24bit unsigned value) so > clients can take this into consideration when setting up the trasnfer. ditto :D > > During slave transfer preparation check if the requested maxburst is valid. > > Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx> > --- > drivers/dma/omap-dma.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c > index 8c1665c8fe33..f6dd849159d8 100644 > --- a/drivers/dma/omap-dma.c > +++ b/drivers/dma/omap-dma.c > @@ -1288,6 +1288,10 @@ static int omap_dma_slave_config(struct dma_chan *chan, struct dma_slave_config > cfg->dst_addr_width == DMA_SLAVE_BUSWIDTH_8_BYTES) > return -EINVAL; > > + if (cfg->src_maxburst > chan->device->max_burst || > + cfg->dst_maxburst > chan->device->max_burst) > + return -EINVAL; > + > memcpy(&c->cfg, cfg, sizeof(c->cfg)); > > return 0; > @@ -1482,6 +1486,7 @@ static int omap_dma_probe(struct platform_device *pdev) > od->ddev.dst_addr_widths = OMAP_DMA_BUSWIDTHS; > od->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); > od->ddev.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; > + od->ddev.max_burst = SZ_16M - 1; /* CCEN: 24bit unsigned */ > od->ddev.dev = &pdev->dev; > INIT_LIST_HEAD(&od->ddev.channels); > spin_lock_init(&od->lock); > -- > 2.14.1 > > > Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki > > -- ~Vinod -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
