Hi Laurent > DMA reads from the data buffer register must be offset by 0x2000 > according to the hardware documentation. > > Signed-off-by: Laurent Pinchart <[email protected]> > --- > drivers/mmc/host/tmio_mmc_dma.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c > index eb8f1d5..4da7be1 100644 > --- a/drivers/mmc/host/tmio_mmc_dma.c > +++ b/drivers/mmc/host/tmio_mmc_dma.c > @@ -312,7 +312,7 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, > struct tmio_mmc_data *pdat > if (pdata->dma->chan_priv_rx) > cfg.slave_id = pdata->dma->slave_id_rx; > cfg.direction = DMA_DEV_TO_MEM; > - cfg.src_addr = cfg.dst_addr; > + cfg.src_addr = cfg.dst_addr + 0x2000; > cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; > cfg.dst_addr = 0; > ret = dmaengine_slave_config(host->chan_rx, &cfg);
Unfortunately, this patch breaks compatibility. This "+ 0x2000" is required only from Renesas R-Car. I alreay sent this fixup patch before (not accepted yet, and I will re-send v2 patch soon) https://www.mail-archive.com/[email protected]/msg26776.html -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
