From: Serge Semin <Sergey.Semin@baikalelectronics.ru>
To: Vinod Koul <vkoul@kernel.org>, Viresh Kumar <vireshk@kernel.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Dan Williams <dan.j.williams@intel.com>
Cc: Serge Semin <Sergey.Semin@baikalelectronics.ru>,
Serge Semin <fancer.lancer@gmail.com>,
Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Arnd Bergmann <arnd@arndb.de>, Rob Herring <robh+dt@kernel.org>,
<linux-mips@vger.kernel.org>, <devicetree@vger.kernel.org>,
<dmaengine@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v5 08/11] dmaengine: dw: Add dummy device_caps callback
Date: Fri, 29 May 2020 17:40:51 +0300 [thread overview]
Message-ID: <20200529144054.4251-9-Sergey.Semin@baikalelectronics.ru> (raw)
In-Reply-To: <20200529144054.4251-1-Sergey.Semin@baikalelectronics.ru>
Since some DW DMA controllers (like one installed on Baikal-T1 SoC) may
have non-uniform DMA capabilities per device channels, let's add
the DW DMA specific device_caps callback to expose that specifics up to
the DMA consumer. It's a dummy function for now. We'll fill it in with
capabilities overrides in the next commits.
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: devicetree@vger.kernel.org
---
Changelog v3:
- This is a new patch created as a result of the discussion with Vinud and
Andy in the framework of DW DMA burst and LLP capabilities.
---
drivers/dma/dw/core.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index fb95920c429e..ceded21537e2 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -1049,6 +1049,11 @@ static void dwc_free_chan_resources(struct dma_chan *chan)
dev_vdbg(chan2dev(chan), "%s: done\n", __func__);
}
+static void dwc_caps(struct dma_chan *chan, struct dma_slave_caps *caps)
+{
+
+}
+
int do_dma_probe(struct dw_dma_chip *chip)
{
struct dw_dma *dw = chip->dw;
@@ -1214,6 +1219,7 @@ int do_dma_probe(struct dw_dma_chip *chip)
dw->dma.device_prep_dma_memcpy = dwc_prep_dma_memcpy;
dw->dma.device_prep_slave_sg = dwc_prep_slave_sg;
+ dw->dma.device_caps = dwc_caps;
dw->dma.device_config = dwc_config;
dw->dma.device_pause = dwc_pause;
dw->dma.device_resume = dwc_resume;
--
2.26.2
next prev parent reply other threads:[~2020-05-29 14:41 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-29 14:40 [PATCH v5 00/11] dmaengine: dw: Take Baikal-T1 SoC DW DMAC peculiarities into account Serge Semin
2020-05-29 14:40 ` [PATCH v5 01/11] dt-bindings: dma: dw: Convert DW DMAC to DT binding Serge Semin
2020-06-01 4:20 ` Viresh Kumar
2020-05-29 14:40 ` [PATCH v5 02/11] dt-bindings: dma: dw: Add max burst transaction length property Serge Semin
2020-05-29 21:24 ` Rob Herring
2020-06-01 4:21 ` Viresh Kumar
2020-05-29 14:40 ` [PATCH v5 03/11] dmaengine: Introduce min burst length capability Serge Semin
2020-05-29 14:40 ` [PATCH v5 04/11] dmaengine: Introduce max SG list entries capability Serge Semin
2020-05-29 14:40 ` [PATCH v5 05/11] dmaengine: Introduce DMA-device device_caps callback Serge Semin
2020-05-29 14:40 ` [PATCH v5 06/11] dmaengine: dw: Take HC_LLP flag into account for noLLP auto-config Serge Semin
2020-05-29 14:40 ` [PATCH v5 07/11] dmaengine: dw: Set DMA device max segment size parameter Serge Semin
2020-05-29 14:40 ` Serge Semin [this message]
2020-05-29 14:40 ` [PATCH v5 09/11] dmaengine: dw: Initialize min and max burst DMA device capability Serge Semin
2020-05-29 15:48 ` Andy Shevchenko
2020-05-29 14:40 ` [PATCH v5 10/11] dmaengine: dw: Introduce max burst length hw config Serge Semin
2020-05-29 14:40 ` [PATCH v5 11/11] dmaengine: dw: Initialize max_sg_nents capability Serge Semin
2020-06-02 9:27 ` [PATCH v5 00/11] dmaengine: dw: Take Baikal-T1 SoC DW DMAC peculiarities into account Serge Semin
2020-06-16 16:32 ` Vinod Koul
2020-06-16 19:07 ` Serge Semin
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