diff options
Diffstat (limited to 'target/linux/lantiq/patches-5.10/0310-v5.16-MIPS-lantiq-dma-make-the-burst-length-configurable-b.patch')
| -rw-r--r-- | target/linux/lantiq/patches-5.10/0310-v5.16-MIPS-lantiq-dma-make-the-burst-length-configurable-b.patch | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-5.10/0310-v5.16-MIPS-lantiq-dma-make-the-burst-length-configurable-b.patch b/target/linux/lantiq/patches-5.10/0310-v5.16-MIPS-lantiq-dma-make-the-burst-length-configurable-b.patch new file mode 100644 index 0000000000..33c06e9d77 --- /dev/null +++ b/target/linux/lantiq/patches-5.10/0310-v5.16-MIPS-lantiq-dma-make-the-burst-length-configurable-b.patch @@ -0,0 +1,86 @@ +From 49293bbc50cb7d44223eb49e0f7cb38e7dac2361 Mon Sep 17 00:00:00 2001 +From: Aleksander Jan Bajkowski <olek2@wp.pl> +Date: Tue, 14 Sep 2021 23:21:01 +0200 +Subject: [PATCH 4/5] MIPS: lantiq: dma: make the burst length configurable by + the drivers + +Make the burst length configurable by the drivers. + +Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl> +Acked-by: Hauke Mehrtens <hauke@hauke-m.de> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + .../include/asm/mach-lantiq/xway/xway_dma.h | 2 +- + arch/mips/lantiq/xway/dma.c | 38 ++++++++++++++++--- + 2 files changed, 34 insertions(+), 6 deletions(-) + +--- a/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h ++++ b/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h +@@ -45,6 +45,6 @@ extern void ltq_dma_close(struct ltq_dma + extern void ltq_dma_alloc_tx(struct ltq_dma_channel *ch); + extern void ltq_dma_alloc_rx(struct ltq_dma_channel *ch); + extern void ltq_dma_free(struct ltq_dma_channel *ch); +-extern void ltq_dma_init_port(int p); ++extern void ltq_dma_init_port(int p, int tx_burst, int rx_burst); + + #endif +--- a/arch/mips/lantiq/xway/dma.c ++++ b/arch/mips/lantiq/xway/dma.c +@@ -181,7 +181,7 @@ ltq_dma_free(struct ltq_dma_channel *ch) + EXPORT_SYMBOL_GPL(ltq_dma_free); + + void +-ltq_dma_init_port(int p) ++ltq_dma_init_port(int p, int tx_burst, int rx_burst) + { + ltq_dma_w32(p, LTQ_DMA_PS); + switch (p) { +@@ -190,16 +190,44 @@ ltq_dma_init_port(int p) + * Tell the DMA engine to swap the endianness of data frames and + * drop packets if the channel arbitration fails. + */ +- ltq_dma_w32_mask(0, DMA_ETOP_ENDIANNESS | DMA_PDEN, ++ ltq_dma_w32_mask(0, (DMA_ETOP_ENDIANNESS | DMA_PDEN), + LTQ_DMA_PCTRL); + break; + +- case DMA_PORT_DEU: +- ltq_dma_w32((DMA_PCTRL_2W_BURST << DMA_TX_BURST_SHIFT) | +- (DMA_PCTRL_2W_BURST << DMA_RX_BURST_SHIFT), ++ default: ++ break; ++ } ++ ++ switch (rx_burst) { ++ case 8: ++ ltq_dma_w32_mask(0x0c, (DMA_PCTRL_8W_BURST << DMA_RX_BURST_SHIFT), + LTQ_DMA_PCTRL); + break; ++ case 4: ++ ltq_dma_w32_mask(0x0c, (DMA_PCTRL_4W_BURST << DMA_RX_BURST_SHIFT), ++ LTQ_DMA_PCTRL); ++ break; ++ case 2: ++ ltq_dma_w32_mask(0x0c, (DMA_PCTRL_2W_BURST << DMA_RX_BURST_SHIFT), ++ LTQ_DMA_PCTRL); ++ break; ++ default: ++ break; ++ } + ++ switch (tx_burst) { ++ case 8: ++ ltq_dma_w32_mask(0x30, (DMA_PCTRL_8W_BURST << DMA_TX_BURST_SHIFT), ++ LTQ_DMA_PCTRL); ++ break; ++ case 4: ++ ltq_dma_w32_mask(0x30, (DMA_PCTRL_4W_BURST << DMA_TX_BURST_SHIFT), ++ LTQ_DMA_PCTRL); ++ break; ++ case 2: ++ ltq_dma_w32_mask(0x30, (DMA_PCTRL_2W_BURST << DMA_TX_BURST_SHIFT), ++ LTQ_DMA_PCTRL); ++ break; + default: + break; + } |