* Venkatraman S <[email protected]> [100310 06:08]: > @@ -1400,14 +1471,23 @@ omap_hsmmc_prepare_data(struct omap_hsmmc_host > *host, struct mmc_request *req) > | (req->data->blocks << 16)); > set_data_timeout(host, req->data->timeout_ns, req->data->timeout_clks); > > - if (host->use_dma) { > - ret = omap_hsmmc_start_dma_transfer(host, req); > - if (ret != 0) { > - dev_dbg(mmc_dev(host->mmc), "MMC start dma failure\n"); > + if (host->dma_caps & DMA_TYPE_SDMA) { > + ret = omap_hsmmc_configure_sdma(host, req); > + if (ret) > return ret; > - } > + host->dma_in_use = DMA_TYPE_SDMA; > } > - return 0; > + if ((host->dma_caps & DMA_TYPE_SDMA_DLOAD) && > + host->data->sg_len > 4) { > + ret = omap_hsmmc_configure_sdma_sglist(host, req); > + if (ret) > + return ret; > + host->dma_in_use = DMA_TYPE_SDMA_DLOAD; > + > + } > + ret = omap_hsmmc_start_dma_transfer(host); > + return ret; > + > }
Does the driver still work in PIO mode? We need to have the drivers capable to fail over to PIO mode as the DMA channels can run out. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
