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| author | Troy Mitchell <troy.mitchell@linux.spacemit.com> | 2026-07-27 01:26:15 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2026-09-03 21:22:21 +0530 |
| commit | d1fc569fcbc7be6de06b034cf954a95e30ca1fb2 (patch) | |
| tree | d6bbc367de4a94e9275beb1b01db324f6eaa866b | |
| parent | cee9395acd8043be0644b25c34bfa86623f2b935 (diff) | |
| download | linux-next-d1fc569fcbc7be6de06b034cf954a95e30ca1fb2.tar.gz linux-next-d1fc569fcbc7be6de06b034cf954a95e30ca1fb2.zip | |
dmaengine: mmp_pdma: fix wrong extended DRCMR base for SpacemiT K3
The extended DRCMR window on SpacemiT K3 starts at 0x1100. Commit
6587b8661a0b ("dmaengine: mmp_pdma: add SpacemiT K3 support") incorrectly
set it to 0x1000, causing DRCMR accesses for request IDs >= 64 to target
offsets 0x100 too low.
The 0x1100 base has been verified on K3 silicon using real SPI and QSPI
DMA transactions. The K3 DMA documentation [1] was updated on June 24,
2026, to reflect the corrected register addresses.
Drop the bogus DRCMR_EXT_BASE_K3 macro and reuse
DRCMR_EXT_BASE_DEFAULT for the K3 ops.
Fixes: 6587b8661a0b ("dmaengine: mmp_pdma: add SpacemiT K3 support")
Link: https://www.spacemit.com/community/document/info?nodepath=hardware/key_stone/k3/k3_docs/k3_usermanual/16_peripherals/dma.md&lang=en [1]
Signed-off-by: Troy Mitchell <troy.mitchell@linux.spacemit.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260727-k3-pdma-fix-drcmr-base-v2-1-afba55cba1f3@linux.spacemit.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/dma/mmp_pdma.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c index 386e85cd4882..78e3e07e681d 100644 --- a/drivers/dma/mmp_pdma.c +++ b/drivers/dma/mmp_pdma.c @@ -52,7 +52,6 @@ #define DCSR_EORINTR BIT(9) /* The end of Receive */ #define DRCMR_BASE 0x0100 -#define DRCMR_EXT_BASE_K3 0x1000 #define DRCMR_EXT_BASE_DEFAULT 0x1100 #define DRCMR_REQ_LIMIT 64 #define DRCMR_MAPVLD BIT(7) /* Map Valid (read / write) */ @@ -1219,7 +1218,7 @@ static const struct mmp_pdma_ops spacemit_k3_pdma_ops = { .get_desc_dst_addr = get_desc_dst_addr_64, .run_bits = (DCSR_RUN | DCSR_LPAEEN | DCSR_EORIRQEN | DCSR_EORSTOPEN), .dma_width = 64, - .drcmr_ext_base = DRCMR_EXT_BASE_K3, + .drcmr_ext_base = DRCMR_EXT_BASE_DEFAULT, }; static const struct of_device_id mmp_pdma_dt_ids[] = { |