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From: "Noralf Trønnes" <noralf@tronnes.org>
To: linux-spi@vger.kernel.org, dri-devel@lists.freedesktop.org
Cc: stefan.wahren@i2se.com, broonie@kernel.org,
	linux-rpi-kernel@lists.infradead.org,
	meghana.madhyastha@gmail.com, kernel@martin.sperl.org
Subject: [PATCH v4 0/4] Chunk splitting of spi transfers
Date: Thu, 11 Apr 2019 18:42:31 +0200	[thread overview]
Message-ID: <20190411164235.49771-1-noralf@tronnes.org> (raw)

spi-bcm2835 has a ~64kB upper limit on DMA transfers. Drivers in
drivers/gpu/drm/tinydrm work around this limitation by splitting the
buffer into multiple transfers. This patchset lifts this limitation by
splitting affected transfers in the SPI core using
spi_split_transfers_maxsize().

This work[1] was begun by Meghana Madhyastha.

Main changes in this version:
- Remove warning in spi_split_transfers_maxsize()
- Split SPI patch into core patch and driver patch

Noralf.

[1] https://patchwork.freedesktop.org/series/38913/

Meghana Madhyastha (3):
  spi: Split spi message into max_dma_len size chunks
  spi/spi-bcm2835: Remove DMA transfer size cap
  drm/tinydrm: Remove chunk splitting in tinydrm_spi_transfer

Noralf Trønnes (1):
  spi: Remove warning in spi_split_transfers_maxsize()

 .../gpu/drm/tinydrm/core/tinydrm-helpers.c    | 83 ++-----------------
 drivers/gpu/drm/tinydrm/mipi-dbi.c            | 10 +--
 drivers/spi/spi-bcm2835.c                     | 15 +---
 drivers/spi/spi.c                             | 10 +--
 4 files changed, 13 insertions(+), 105 deletions(-)

-- 
2.20.1

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             reply	other threads:[~2019-04-11 16:42 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-11 16:42 Noralf Trønnes [this message]
2019-04-11 16:42 ` [PATCH v4 1/4] spi: Remove warning in spi_split_transfers_maxsize() Noralf Trønnes
     [not found] ` <20190411164235.49771-1-noralf-L59+Z2yzLopAfugRpC6u6w@public.gmane.org>
2019-04-11 16:42   ` [PATCH v4 2/4] spi: Split spi message into max_dma_len size chunks Noralf Trønnes
2019-04-11 18:18     ` Lukas Wunner
2019-04-11 21:02       ` Noralf Trønnes
2019-04-12  9:47         ` Mark Brown
     [not found]           ` <20190412094721.GE6909-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2019-04-12 10:03             ` kernel-TqfNSX0MhmxHKSADF0wUEw
2019-04-12 10:22               ` Mark Brown
2019-04-12 10:54           ` Lukas Wunner
2019-04-12 11:09             ` Mark Brown
2019-04-12 11:16               ` Lukas Wunner
2019-04-12 11:28                 ` Mark Brown
     [not found]                 ` <20190412111615.25iogtr6qwc5zbx7-JFq808J9C/izQB+pC5nmwQ@public.gmane.org>
2019-04-12 11:34                   ` kernel-TqfNSX0MhmxHKSADF0wUEw
2019-04-12 10:46         ` Lukas Wunner
2019-04-12 11:46           ` Mark Brown
2019-04-11 20:39     ` Noralf Trønnes
     [not found]     ` <20190411164235.49771-3-noralf-L59+Z2yzLopAfugRpC6u6w@public.gmane.org>
2019-04-12  9:08       ` Mark Brown
2019-04-11 16:42 ` [PATCH v4 3/4] spi/spi-bcm2835: Remove DMA transfer size cap Noralf Trønnes
2019-04-11 16:42 ` [PATCH v4 4/4] drm/tinydrm: Remove chunk splitting in tinydrm_spi_transfer Noralf Trønnes

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