diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0022-dmaengine-bcm2835-Load-driver-early-and-support-lega.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0022-dmaengine-bcm2835-Load-driver-early-and-support-lega.patch | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0022-dmaengine-bcm2835-Load-driver-early-and-support-lega.patch b/target/linux/brcm2708/patches-4.4/0022-dmaengine-bcm2835-Load-driver-early-and-support-lega.patch deleted file mode 100644 index bec3a30eeb..0000000000 --- a/target/linux/brcm2708/patches-4.4/0022-dmaengine-bcm2835-Load-driver-early-and-support-lega.patch +++ /dev/null @@ -1,97 +0,0 @@ -From 50e1ac1b9abaacc14f45e7ca73dc613c4d6dba99 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org> -Date: Sat, 3 Oct 2015 22:22:55 +0200 -Subject: [PATCH] dmaengine: bcm2835: Load driver early and support legacy API -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Load driver early since at least bcm2708_fb doesn't support deferred -probing and even if it did, we don't want the video driver deferred. -Support the legacy DMA API which is needed by bcm2708_fb. -Don't mask out channel 2. - -Signed-off-by: Noralf Trønnes <noralf@tronnes.org> ---- - drivers/dma/Kconfig | 2 +- - drivers/dma/bcm2835-dma.c | 30 ++++++++++++++++++++++++------ - 2 files changed, 25 insertions(+), 7 deletions(-) - ---- a/drivers/dma/Kconfig -+++ b/drivers/dma/Kconfig -@@ -108,7 +108,7 @@ config COH901318 - - config DMA_BCM2835 - tristate "BCM2835 DMA engine support" -- depends on ARCH_BCM2835 -+ depends on ARCH_BCM2835 || ARCH_BCM2708 || ARCH_BCM2709 - select DMA_ENGINE - select DMA_VIRTUAL_CHANNELS - ---- a/drivers/dma/bcm2835-dma.c -+++ b/drivers/dma/bcm2835-dma.c -@@ -36,6 +36,7 @@ - #include <linux/interrupt.h> - #include <linux/list.h> - #include <linux/module.h> -+#include <linux/platform_data/dma-bcm2708.h> - #include <linux/platform_device.h> - #include <linux/slab.h> - #include <linux/io.h> -@@ -786,6 +787,10 @@ static int bcm2835_dma_probe(struct plat - if (IS_ERR(base)) - return PTR_ERR(base); - -+ rc = bcm_dmaman_probe(pdev, base, BCM2835_DMA_BULK_MASK); -+ if (rc) -+ dev_err(&pdev->dev, "Failed to initialize the legacy API\n"); -+ - od->base = base; - - dma_cap_set(DMA_SLAVE, od->ddev.cap_mask); -@@ -818,11 +823,8 @@ static int bcm2835_dma_probe(struct plat - goto err_no_dma; - } - -- /* -- * Do not use the FIQ and BULK channels, -- * because they are used by the GPU. -- */ -- chans_available &= ~(BCM2835_DMA_FIQ_MASK | BCM2835_DMA_BULK_MASK); -+ /* Channel 0 is used by the legacy API */ -+ chans_available &= ~BCM2835_DMA_BULK_MASK; - - for (i = 0; i < pdev->num_resources; i++) { - irq = platform_get_irq(pdev, i); -@@ -866,6 +868,7 @@ static int bcm2835_dma_remove(struct pla - { - struct bcm2835_dmadev *od = platform_get_drvdata(pdev); - -+ bcm_dmaman_remove(pdev); - dma_async_device_unregister(&od->ddev); - bcm2835_dma_free(od); - -@@ -881,7 +884,22 @@ static struct platform_driver bcm2835_dm - }, - }; - --module_platform_driver(bcm2835_dma_driver); -+static int bcm2835_dma_init(void) -+{ -+ return platform_driver_register(&bcm2835_dma_driver); -+} -+ -+static void bcm2835_dma_exit(void) -+{ -+ platform_driver_unregister(&bcm2835_dma_driver); -+} -+ -+/* -+ * Load after serial driver (arch_initcall) so we see the messages if it fails, -+ * but before drivers (module_init) that need a DMA channel. -+ */ -+subsys_initcall(bcm2835_dma_init); -+module_exit(bcm2835_dma_exit); - - MODULE_ALIAS("platform:bcm2835-dma"); - MODULE_DESCRIPTION("BCM2835 DMA engine driver"); |