kernel/git/stable/linux.git/drivers/dma/sh, branch linux-6.17.y

dmaengine: sh: setup_xref error handling

2025-11-13T20:37:11+00:00

[ Upstream commit d9a3e9929452780df16f3414f0d59b5f69d058cf ] This patch modifies the type of setup_xref from void to int and handles errors since the function can fail. `setup_xref` now returns the (eventual) error from `dmae_set_dmars`|`dmae_set_chcr`, while `shdma_tx_submit` handles the result, removing the chunks from the queue and marking PM as idle in case of an error. Signed-off-by: Thomas Andreatta Link: https://lore.kernel.org/r/20250827152442.90962-1-thomas.andreatta2000@gmail.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: sh: Do not enable SH_DMAE_BASE by default during compile testing

2025-06-26T22:34:19+00:00

Enabling the compile test should not cause automatic enabling of all drivers. Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20250404122114.359087-1-krzysztof.kozlowski@linaro.org Signed-off-by: Vinod Koul

dmaengine: sh: rz-dmac: Add RZ/V2H(P) support

2025-05-14T14:30:40+00:00

The DMAC IP found on the Renesas RZ/V2H(P) family of SoCs is similar to the version found on the Renesas RZ/G2L family of SoCs, but there are some differences: * It only uses one register area * It only uses one clock * It only uses one reset * Instead of using MID/IRD it uses REQ No * It is connected to the Interrupt Control Unit (ICU) * On the RZ/G2L there is only 1 DMAC, on the RZ/V2H(P) there are 5 Add specific support for the Renesas RZ/V2H(P) family of SoC by tackling the aforementioned differences. Signed-off-by: Fabrizio Castro Reviewed-by: Lad Prabhakar Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20250423143422.3747702-6-fabrizio.castro.jz@renesas.com Signed-off-by: Vinod Koul

dmaengine: sh: rz-dmac: Allow for multiple DMACs

2025-05-14T14:30:40+00:00

dma_request_channel() calls into __dma_request_channel() with NULL as value for np, which won't allow for the selection of the correct DMAC when multiple DMACs are available. Switch to using __dma_request_channel() directly so that we can choose the desired DMA for the channel. This is in preparation of adding DMAC support for the Renesas RZ/V2H(P) and similar SoCs. Signed-off-by: Fabrizio Castro Reviewed-by: Lad Prabhakar Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20250423143422.3747702-5-fabrizio.castro.jz@renesas.com Signed-off-by: Vinod Koul

dmaengine: Fix typo in comment

2025-02-27T12:06:29+00:00

s/consumer/consume/ Signed-off-by: Thorsten Blum Link: https://lore.kernel.org/r/20250219105419.2025-2-thorsten.blum@linux.dev Signed-off-by: Vinod Koul

dmaengine: sh: rcar-dmac: add comment for r8a779a0 compatible

2024-12-04T12:30:56+00:00

Add the reason why we need r8a779a0 compatible. Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/87a5dlwlr0.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Vinod Koul

dmaengine: fix typo in the comment

2024-10-21T17:37:08+00:00

Correctly spelled comments make it easier for the reader to understand the code. Replace 'enngine' with 'engine' in the comment & replace 'trascatioin' with 'transaction' in the comment & replace 'descripter' with 'descriptor' in the comment & replace 'descritpor' with 'descriptor' in the comment & replace 'rgisters' with 'registers' in the comment. Signed-off-by: Yan Zhen Acked-by: Palmer Dabbelt Link: https://lore.kernel.org/r/20240918034114.860132-1-yanzhen@vivo.com Signed-off-by: Vinod Koul

dmaengine: Switch back to struct platform_driver::remove()

2024-10-14T18:20:34+00:00

After commit 0edb555a65d1 ("platform: Make platform_driver::remove() return void") .remove() is (again) the right callback to implement for platform drivers. Convert all platform drivers below drivers/dma after the previous conversion commits apart from the wireless drivers to use .remove(), with the eventual goal to drop struct platform_driver::remove_new(). As .remove() and .remove_new() have the same prototypes, conversion is done by just changing the structure member name in the driver initializer. Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20241004062227.187726-2-u.kleine-koenig@baylibre.com Signed-off-by: Vinod Koul

dmaengine: sh: rz-dmac: add r7s72100 support

2024-10-14T17:41:33+00:00

This SoC needs to make getting resets optional. Descriptions are reworded to be more generic. Signed-off-by: Wolfram Sang Reviewed-by: Philipp Zabel Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20241007110200.43166-8-wsa+renesas@sang-engineering.com Signed-off-by: Vinod Koul

dmaengine: sh: rz-dmac: handle configs where one address is zero

2024-10-14T17:40:58+00:00

Configs like the ones coming from the MMC subsystem will have either 'src' or 'dst' zeroed, resulting in an unknown bus width. This will bail out on the RZ DMA driver because of the sanity check for a valid bus width. Reorder the code, so that the check will only be applied when the corresponding address is non-zero. Fixes: 5000d37042a6 ("dmaengine: sh: Add DMAC driver for RZ/G2L SoC") Signed-off-by: Wolfram Sang Reviewed-by: Biju Das Reviewed-by: Geert Uytterhoeven Tested-by: Biju Das Tested-by: Claudiu Beznea Link: https://lore.kernel.org/r/20241007110200.43166-6-wsa+renesas@sang-engineering.com Signed-off-by: Vinod Koul