From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
To: linux-media@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, devel@driverdev.osuosl.org
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Maxime Ripard <maxime.ripard@bootlin.com>,
Chen-Yu Tsai <wens@csie.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
linux-sunxi@googlegroups.com, Randy Li <ayaka@soulik.info>,
Hans Verkuil <hverkuil@xs4all.nl>,
Ezequiel Garcia <ezequiel@collabora.com>,
Tomasz Figa <tfiga@chromium.org>,
Alexandre Courbot <acourbot@chromium.org>,
Philipp Zabel <p.zabel@pengutronix.de>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Sakari Ailus <sakari.ailus@linux.intel.com>
Subject: [PATCH v7 3/8] dt-bindings: media: Document bindings for the Cedrus VPU driver
Date: Thu, 9 Aug 2018 11:04:30 +0200 [thread overview]
Message-ID: <20180809090435.17248-4-paul.kocialkowski@bootlin.com> (raw)
In-Reply-To: <20180809090435.17248-1-paul.kocialkowski@bootlin.com>
This adds a device-tree binding document that specifies the properties
used by the Cedurs VPU driver, as well as examples.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
.../devicetree/bindings/media/cedrus.txt | 54 +++++++++++++++++++
1 file changed, 54 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/cedrus.txt
diff --git a/Documentation/devicetree/bindings/media/cedrus.txt b/Documentation/devicetree/bindings/media/cedrus.txt
new file mode 100644
index 000000000000..a089a0c1ff05
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/cedrus.txt
@@ -0,0 +1,54 @@
+Device-tree bindings for the VPU found in Allwinner SoCs, referred to as the
+Video Engine (VE) in Allwinner literature.
+
+The VPU can only access the first 256 MiB of DRAM, that are DMA-mapped starting
+from the DRAM base. This requires specific memory allocation and handling.
+
+Required properties:
+- compatible : must be one of the following compatibles:
+ - "allwinner,sun4i-a10-video-engine"
+ - "allwinner,sun5i-a13-video-engine"
+ - "allwinner,sun7i-a20-video-engine"
+ - "allwinner,sun8i-a33-video-engine"
+ - "allwinner,sun8i-h3-video-engine"
+- reg : register base and length of VE;
+- clocks : list of clock specifiers, corresponding to entries in
+ the clock-names property;
+- clock-names : should contain "ahb", "mod" and "ram" entries;
+- resets : phandle for reset;
+- interrupts : VE interrupt number;
+- allwinner,sram : SRAM region to use with the VE.
+
+Optional properties:
+- memory-region : CMA pool to use for buffers allocation instead of the
+ default CMA pool.
+
+Example:
+
+reserved-memory {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ /* Address must be kept in the lower 256 MiBs of DRAM for VE. */
+ cma_pool: cma@4a000000 {
+ compatible = "shared-dma-pool";
+ size = <0x6000000>;
+ alloc-ranges = <0x4a000000 0x6000000>;
+ reusable;
+ linux,cma-default;
+ };
+};
+
+video-codec@1c0e000 {
+ compatible = "allwinner,sun7i-a20-video-engine";
+ reg = <0x01c0e000 0x1000>;
+
+ clocks = <&ccu CLK_AHB_VE>, <&ccu CLK_VE>,
+ <&ccu CLK_DRAM_VE>;
+ clock-names = "ahb", "mod", "ram";
+
+ resets = <&ccu RST_VE>;
+ interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>;
+ allwinner,sram = <&ve_sram 1>;
+};
--
2.18.0
next prev parent reply other threads:[~2018-08-09 9:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-09 9:04 [PATCH v7 0/8] Cedrus driver for the Allwinner Video Engine, using media requests Paul Kocialkowski
2018-08-09 9:04 ` [PATCH v7 1/8] media: v4l: Add definitions for MPEG2 slice format and metadata Paul Kocialkowski
2018-08-09 9:04 ` [PATCH v7 2/8] media: v4l: Add definition for the Sunxi tiled NV12 format Paul Kocialkowski
2018-08-09 9:04 ` Paul Kocialkowski [this message]
2018-08-09 9:04 ` [PATCH v7 4/8] media: platform: Add Cedrus VPU decoder driver Paul Kocialkowski
2018-08-09 9:04 ` [PATCH v7 5/8] ARM: dts: sun5i: Add Video Engine and reserved memory nodes Paul Kocialkowski
2018-08-09 9:04 ` [PATCH v7 6/8] ARM: dts: sun7i-a20: " Paul Kocialkowski
2018-08-09 9:04 ` [PATCH v7 7/8] ARM: dts: sun8i-a33: " Paul Kocialkowski
2018-08-09 9:04 ` [PATCH v7 8/8] ARM: dts: sun8i-h3: " Paul Kocialkowski
2018-08-22 17:25 ` [PATCH v7 0/8] Cedrus driver for the Allwinner Video Engine, using media requests Ezequiel Garcia
2018-08-23 7:40 ` Paul Kocialkowski
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