| Message ID | 20191014183108.24804-6-nsaenzjulienne@suse.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ARM: Raspberry Pi 4 DMA support | expand |
diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig index e4e25f287ad7..fd7d725d596c 100644 --- a/arch/arm/mach-bcm/Kconfig +++ b/arch/arm/mach-bcm/Kconfig @@ -163,6 +163,7 @@ config ARCH_BCM2835 select ARM_ERRATA_411920 if ARCH_MULTI_V6 select ARM_GIC if ARCH_MULTI_V7 select ZONE_DMA if ARCH_MULTI_V7 + select SWIOTLB if ARCH_MULTI_V7 select ARM_TIMER_SP804 select HAVE_ARM_ARCH_TIMER if ARCH_MULTI_V7 select TIMER_OF diff --git a/arch/arm/mach-bcm/bcm2711.c b/arch/arm/mach-bcm/bcm2711.c index dbe296798647..67d98cb0533f 100644 --- a/arch/arm/mach-bcm/bcm2711.c +++ b/arch/arm/mach-bcm/bcm2711.c @@ -19,6 +19,7 @@ DT_MACHINE_START(BCM2711, "BCM2711") #ifdef CONFIG_ZONE_DMA .dma_zone_size = SZ_1G, #endif + .dma_direct = true, .dt_compat = bcm2711_compat, .smp = smp_ops(bcm2836_smp_ops), MACHINE_END
The Raspberry Pi 4 supports up to 4GB of memory yet most of its devices are only able to address the fist GB. Enable dma-direct for that board in order to benefit from swiotlb's bounce buffering mechanism. Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> --- arch/arm/mach-bcm/Kconfig | 1 + arch/arm/mach-bcm/bcm2711.c | 1 + 2 files changed, 2 insertions(+)