From 8299d1f057439f94c6a4412e2e5c5082b82a30c9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Sat, 21 Aug 2021 10:54:34 +0200 Subject: bcm27xx: add kernel 5.10 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted patches, wireless patches and defconfig patches. bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 4B v1.1 4G bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas --- ...cm2835-Load-driver-early-and-support-lega.patch | 101 +++++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 target/linux/bcm27xx/patches-5.10/950-0014-dmaengine-bcm2835-Load-driver-early-and-support-lega.patch (limited to 'target/linux/bcm27xx/patches-5.10/950-0014-dmaengine-bcm2835-Load-driver-early-and-support-lega.patch') diff --git a/target/linux/bcm27xx/patches-5.10/950-0014-dmaengine-bcm2835-Load-driver-early-and-support-lega.patch b/target/linux/bcm27xx/patches-5.10/950-0014-dmaengine-bcm2835-Load-driver-early-and-support-lega.patch new file mode 100644 index 0000000000..f4cf804581 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.10/950-0014-dmaengine-bcm2835-Load-driver-early-and-support-lega.patch @@ -0,0 +1,101 @@ +From 1fafff0383c50bbbb2d5bb3205923904f3f55ce8 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= +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 +--- + drivers/dma/Kconfig | 2 +- + drivers/dma/bcm2835-dma.c | 26 +++++++++++++++++++++++++- + 2 files changed, 26 insertions(+), 2 deletions(-) + +--- a/drivers/dma/Kconfig ++++ b/drivers/dma/Kconfig +@@ -134,7 +134,7 @@ 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 +@@ -25,6 +25,7 @@ + #include + #include + #include ++#include + #include + #include + #include +@@ -36,6 +37,7 @@ + + #define BCM2835_DMA_MAX_DMA_CHAN_SUPPORTED 14 + #define BCM2835_DMA_CHAN_NAME_SIZE 8 ++#define BCM2835_DMA_BULK_MASK BIT(0) + + /** + * struct bcm2835_dmadev - BCM2835 DMA controller +@@ -906,6 +908,9 @@ static int bcm2835_dma_probe(struct plat + base = devm_ioremap_resource(&pdev->dev, res); + 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; + +@@ -951,6 +956,9 @@ static int bcm2835_dma_probe(struct plat + goto err_no_dma; + } + ++ /* Channel 0 is used by the legacy API */ ++ chans_available &= ~BCM2835_DMA_BULK_MASK; ++ + /* get irqs for each channel that we support */ + for (i = 0; i <= BCM2835_DMA_MAX_DMA_CHAN_SUPPORTED; i++) { + /* skip masked out channels */ +@@ -1025,6 +1033,7 @@ 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); + +@@ -1040,7 +1049,22 @@ 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"); -- cgit v1.2.3