dmaengine: dw-edma-pcie: Handle optional data blocks

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Skip data block BAR mapping and debug output when a channel has no data
block size. This lets future providers describe channels that only need
descriptor memory exposed.

No functional change intended for existing Synopsys EDDA and
AMD (Xilinx) MDB/CPM6 devices. Their static channel descriptions still
provide data block sizes where data block windows are used. A zero-sized
data block now means "not present" for future metadata providers.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Link: https://patch.msgid.link/20260721062815.4117887-13-den@valinux.co.jp
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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Koichiro Den 2026-07-21 15:28:13 +09:00 • committed by Vinod Koul

parent 6f3328acab

commit 81964f5396

1 changed files with 20 additions and 4 deletions

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drivers/dma/dw-edma/dw-edma-pcie.c

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