diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0290-bcm2835-dma-Add-support-for-per-channel-flags.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0290-bcm2835-dma-Add-support-for-per-channel-flags.patch | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0290-bcm2835-dma-Add-support-for-per-channel-flags.patch b/target/linux/bcm27xx/patches-4.19/950-0290-bcm2835-dma-Add-support-for-per-channel-flags.patch deleted file mode 100644 index ff564390cf..0000000000 --- a/target/linux/bcm27xx/patches-4.19/950-0290-bcm2835-dma-Add-support-for-per-channel-flags.patch +++ /dev/null @@ -1,48 +0,0 @@ -From 4ebec374d97c0bba1e41558071bfa062894b07a0 Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.org> -Date: Fri, 20 Jul 2018 22:03:41 +0100 -Subject: [PATCH] bcm2835-dma: Add support for per-channel flags - -Add the ability to interpret the high bits of the dreq specifier as -flags to be included in the DMA_CS register. The motivation for this -change is the ability to set the DISDEBUG flag for SD card transfers -to avoid corruption when using the VPU debugger. - -Signed-off-by: Phil Elwell <phil@raspberrypi.org> ---- - drivers/dma/bcm2835-dma.c | 10 ++++++++-- - 1 file changed, 8 insertions(+), 2 deletions(-) - ---- a/drivers/dma/bcm2835-dma.c -+++ b/drivers/dma/bcm2835-dma.c -@@ -146,6 +146,10 @@ struct bcm2835_desc { - #define BCM2835_DMA_S_DREQ BIT(10) /* enable SREQ for source */ - #define BCM2835_DMA_S_IGNORE BIT(11) /* ignore source reads - read 0 */ - #define BCM2835_DMA_BURST_LENGTH(x) ((x & 15) << 12) -+#define BCM2835_DMA_CS_FLAGS(x) (x & (BCM2835_DMA_PRIORITY(15) | \ -+ BCM2835_DMA_PANIC_PRIORITY(15) | \ -+ BCM2835_DMA_WAIT_FOR_WRITES | \ -+ BCM2835_DMA_DIS_DEBUG)) - #define BCM2835_DMA_PER_MAP(x) ((x & 31) << 16) /* REQ source */ - #define BCM2835_DMA_WAIT(x) ((x & 31) << 21) /* add DMA-wait cycles */ - #define BCM2835_DMA_NO_WIDE_BURSTS BIT(26) /* no 2 beat write bursts */ -@@ -461,7 +465,8 @@ static void bcm2835_dma_start_desc(struc - c->desc = d = to_bcm2835_dma_desc(&vd->tx); - - writel(d->cb_list[0].paddr, c->chan_base + BCM2835_DMA_ADDR); -- writel(BCM2835_DMA_ACTIVE, c->chan_base + BCM2835_DMA_CS); -+ writel(BCM2835_DMA_ACTIVE | BCM2835_DMA_CS_FLAGS(c->dreq), -+ c->chan_base + BCM2835_DMA_CS); - } - - static irqreturn_t bcm2835_dma_callback(int irq, void *data) -@@ -488,7 +493,8 @@ static irqreturn_t bcm2835_dma_callback( - * if this IRQ handler is threaded.) If the channel is finished, it - * will remain idle despite the ACTIVE flag being set. - */ -- writel(BCM2835_DMA_INT | BCM2835_DMA_ACTIVE, -+ writel(BCM2835_DMA_INT | BCM2835_DMA_ACTIVE | -+ BCM2835_DMA_CS_FLAGS(c->dreq), - c->chan_base + BCM2835_DMA_CS); - - d = c->desc; |