diff options
Diffstat (limited to 'freed-ora/tags/f27/4.15.9-300.fc27.gnu/arm-revert-mmc-omap_hsmmc-Use-dma_request_chan-for-reque.patch')
| -rw-r--r-- | freed-ora/tags/f27/4.15.9-300.fc27.gnu/arm-revert-mmc-omap_hsmmc-Use-dma_request_chan-for-reque.patch | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/freed-ora/tags/f27/4.15.9-300.fc27.gnu/arm-revert-mmc-omap_hsmmc-Use-dma_request_chan-for-reque.patch b/freed-ora/tags/f27/4.15.9-300.fc27.gnu/arm-revert-mmc-omap_hsmmc-Use-dma_request_chan-for-reque.patch new file mode 100644 index 000000000..b55dec0cb --- /dev/null +++ b/freed-ora/tags/f27/4.15.9-300.fc27.gnu/arm-revert-mmc-omap_hsmmc-Use-dma_request_chan-for-reque.patch @@ -0,0 +1,100 @@ +From bb3e08008c0e48fd4f51a0f0957eecae61a24d69 Mon Sep 17 00:00:00 2001 +From: Peter Robinson <pbrobinson@gmail.com> +Date: Tue, 1 Nov 2016 09:35:30 +0000 +Subject: [PATCH] Revert "mmc: omap_hsmmc: Use dma_request_chan() for + requesting DMA channel" + +This reverts commit 81eef6ca92014845d40e3f1310e42b7010303acc. +--- + drivers/mmc/host/omap_hsmmc.c | 50 ++++++++++++++++++++++++++++++++++--------- + 1 file changed, 40 insertions(+), 10 deletions(-) + +diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c +index 24ebc9a..3563321 100644 +--- a/drivers/mmc/host/omap_hsmmc.c ++++ b/drivers/mmc/host/omap_hsmmc.c +@@ -32,6 +32,7 @@ + #include <linux/of_irq.h> + #include <linux/of_gpio.h> + #include <linux/of_device.h> ++#include <linux/omap-dmaengine.h> + #include <linux/mmc/host.h> + #include <linux/mmc/core.h> + #include <linux/mmc/mmc.h> +@@ -1992,6 +1993,8 @@ static int omap_hsmmc_probe(struct platform_device *pdev) + struct resource *res; + int ret, irq; + const struct of_device_id *match; ++ dma_cap_mask_t mask; ++ unsigned tx_req, rx_req; + const struct omap_mmc_of_data *data; + void __iomem *base; + +@@ -2121,17 +2124,44 @@ static int omap_hsmmc_probe(struct platform_device *pdev) + + omap_hsmmc_conf_bus_power(host); + +- host->rx_chan = dma_request_chan(&pdev->dev, "rx"); +- if (IS_ERR(host->rx_chan)) { +- dev_err(mmc_dev(host->mmc), "RX DMA channel request failed\n"); +- ret = PTR_ERR(host->rx_chan); ++ if (!pdev->dev.of_node) { ++ res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); ++ if (!res) { ++ dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n"); ++ ret = -ENXIO; ++ goto err_irq; ++ } ++ tx_req = res->start; ++ ++ res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); ++ if (!res) { ++ dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n"); ++ ret = -ENXIO; ++ goto err_irq; ++ } ++ rx_req = res->start; ++ } ++ ++ dma_cap_zero(mask); ++ dma_cap_set(DMA_SLAVE, mask); ++ ++ host->rx_chan = ++ dma_request_slave_channel_compat(mask, omap_dma_filter_fn, ++ &rx_req, &pdev->dev, "rx"); ++ ++ if (!host->rx_chan) { ++ dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel\n"); ++ ret = -ENXIO; + goto err_irq; + } + +- host->tx_chan = dma_request_chan(&pdev->dev, "tx"); +- if (IS_ERR(host->tx_chan)) { +- dev_err(mmc_dev(host->mmc), "TX DMA channel request failed\n"); +- ret = PTR_ERR(host->tx_chan); ++ host->tx_chan = ++ dma_request_slave_channel_compat(mask, omap_dma_filter_fn, ++ &tx_req, &pdev->dev, "tx"); ++ ++ if (!host->tx_chan) { ++ dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel\n"); ++ ret = -ENXIO; + goto err_irq; + } + +@@ -2189,9 +2219,9 @@ err_slot_name: + mmc_remove_host(mmc); + err_irq: + device_init_wakeup(&pdev->dev, false); +- if (!IS_ERR_OR_NULL(host->tx_chan)) ++ if (host->tx_chan) + dma_release_channel(host->tx_chan); +- if (!IS_ERR_OR_NULL(host->rx_chan)) ++ if (host->rx_chan) + dma_release_channel(host->rx_chan); + pm_runtime_dont_use_autosuspend(host->dev); + pm_runtime_put_sync(host->dev); +-- +2.9.3 + |
