linux.git/drivers/dma/sh, branch v5.18

dmaengine: sh: Kconfig: Add ARCH_R9A07G054 dependency for RZ_DMAC config option

2022-03-11T07:04:05+00:00

RZ/V2L DMA block is identical to one found on RZ/G2L SoC. This patch adds
ARCH_R9A07G054 dependency for RZ_DMAC config option so that the driver
can be enabled on RZ/V2L SoC. While at it, also update config help text.

Signed-off-by: Lad Prabhakar 
Reviewed-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/20220221224321.11939-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Vinod Koul

dmaengine: Revert "dmaengine: shdma: Fix runtime PM imbalance on error"

2022-03-10T04:43:20+00:00

This reverts commit 455896c53d5b ("dmaengine: shdma: Fix runtime PM
imbalance on error") as the patch wrongly reduced the count on error and
did not bail out. So drop the count by reverting the patch .

Signed-off-by: Vinod Koul

dmaengine: shdma: Fix runtime PM imbalance on error

2022-02-15T05:34:16+00:00

pm_runtime_get_() increments the runtime PM usage counter even
when it returns an error code, thus a matching decrement is needed on
the error handling path to keep the counter balanced.

Signed-off-by: Yongzhi Liu 
Link: https://lore.kernel.org/r/1642311296-87020-1-git-send-email-lyz_cs@pku.edu.cn
Signed-off-by: Vinod Koul

dmaengine: sh: rcar-dmac: Check for error num after dma_set_max_seg_size

2022-02-15T05:30:13+00:00

As the possible failure of the dma_set_max_seg_size(), it should be
better to check the return value of the dma_set_max_seg_size().

Fixes: 97d49c59e219 ("dmaengine: rcar-dmac: set scatter/gather max segment size")
Reported-by: Geert Uytterhoeven 
Signed-off-by: Jiasheng Jiang 
Reviewed-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/20220111011239.452837-1-jiasheng@iscas.ac.cn
Signed-off-by: Vinod Koul

dmaengine: sh: rcar-dmac: Check for error num after setting mask

2022-02-15T05:27:17+00:00

Because of the possible failure of the dma_supported(), the
dma_set_mask_and_coherent() may return error num.
Therefore, it should be better to check it and return the error if
fails.

Fixes: dc312349e875 ("dmaengine: rcar-dmac: Widen DMA mask to 40 bits")
Signed-off-by: Jiasheng Jiang 
Reviewed-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/20220106030939.2644320-1-jiasheng@iscas.ac.cn
Signed-off-by: Vinod Koul

dmaengine: rcar-dmac: Add support for R-Car S4-8

2022-01-03T11:28:21+00:00

Add support for R-Car S4-8. We can reuse R-Car V3U code so that
renames variable names as "gen4".

Note that some registers of R-Car V3U do not exist on R-Car S4-8,
but none of them are used by the driver for now.

Signed-off-by: Yoshihiro Shimoda 
Reviewed-by: Ulrich Hecht 
Reviewed-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/20211222114507.1252947-3-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Vinod Koul

Merge tag 'dmaengine_topic_slave_id_removal_5.17' into next

2021-12-17T16:12:17+00:00

Merge the tag dmaengine_topic_slave_id_removal_5.17 into next. This
brings in the slave_id removal topic changes

dmaengine: sh: Use bitmap_zalloc() when applicable

2021-12-17T16:09:28+00:00

'shdma_slave_used' is a bitmap. So use 'bitmap_zalloc()' to simplify code,
improve the semantic and avoid some open-coded arithmetic in allocator
arguments.

Also change the corresponding 'kfree()' into 'bitmap_free()' to keep
consistency.

Signed-off-by: Christophe JAILLET 
Link: https://lore.kernel.org/r/3efaf2784424ae3d7411dc47f8b6b03e7bb8c059.1637702701.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul

dmaengine: shdma: remove legacy slave_id parsing

2021-12-17T05:53:56+00:00

The slave device is picked through either devicetree or a filter
function, and any remaining out-of-tree drivers would have warned
about this usage since 2015.

Stop interpreting the field finally so it can be removed from
the interface.

Reviewed-by: Laurent Pinchart 
Signed-off-by: Arnd Bergmann 
Acked-by: Mark Brown 
Link: https://lore.kernel.org/r/20211122222203.4103644-6-arnd@kernel.org
Signed-off-by: Vinod Koul

dmaengine: sh: make array ds_lut static

2021-10-25T06:45:34+00:00

Don't populate the read-only array ds_lut on the stack but instead it
static. Also makes the object code smaller by 163 bytes:

Before:
   text    data     bss     dec     hex filename
  23508    4796       0   28304    6e90 ./drivers/dma/sh/rz-dmac.o

After:
   text    data     bss     dec     hex filename
  23281    4860       0   28141    6ded ./drivers/dma/sh/rz-dmac.o

(gcc version 11.2.0)

Signed-off-by: Colin Ian King 
Link: https://lore.kernel.org/r/20210915112038.12407-1-colin.king@canonical.com
Signed-off-by: Vinod Koul