From: Frederic Chen <frederic.chen@mediatek.com>
To: <hans.verkuil@cisco.com>,
<laurent.pinchart+renesas@ideasonboard.com>, <tfiga@chromium.org>,
<matthias.bgg@gmail.com>, <mchehab@kernel.org>
Cc: <linux-mediatek@lists.infradead.org>,
<linux-arm-kernel@lists.infradead.org>, <Sean.Cheng@mediatek.com>,
<sj.huang@mediatek.com>, <christie.yu@mediatek.com>,
<holmes.chiou@mediatek.com>, <frederic.chen@mediatek.com>,
<Jerry-ch.Chen@mediatek.com>, <jungo.lin@mediatek.com>,
<Rynn.Wu@mediatek.com>, <linux-media@vger.kernel.org>,
<srv_heupstream@mediatek.com>, <yuzhao@chromium.org>,
<zwisler@chromium.org>
Subject: [RFC PATCH V0 1/7] [media] dt-bindings: mt8183: Add binding for ISP Pass 1 shared memory
Date: Tue, 5 Feb 2019 14:42:40 +0800 [thread overview]
Message-ID: <1549348966-14451-2-git-send-email-frederic.chen@mediatek.com> (raw)
In-Reply-To: <1549348966-14451-1-git-send-email-frederic.chen@mediatek.com>
This patch adds the binding for describing the shared memory
used to exchange configuration and tuning data between the
co-processor and Pass 1 (P1) unit of the camera ISP system on
Mediatek SoCs.
Signed-off-by: Frederic Chen <frederic.chen@mediatek.com>
---
.../mediatek,reserve-memory-cam_smem.txt | 44 ++++++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt
diff --git a/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt b/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt
new file mode 100644
index 0000000..05c1bf1
--- /dev/null
+++ b/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt
@@ -0,0 +1,44 @@
+Mediatek ISP Pass 1 Shared Memory binding
+
+This binding describes the shared memory, which serves the purpose of
+describing the shared memory region used to exchange data between Pass 1
+unit of Image Signal Processor (ISP) and the co-processor in Mediatek
+SoCs.
+
+The co-processor doesn't have the iommu so we need to use the physical
+address to access the shared buffer in the firmware.
+
+The Pass 1 unit of ISP can access memory through the iommu so it
+uses the dma address to access the memory region.
+(See iommu/mediatek,iommu.txt for the detailed description of Mediatek IOMMU)
+
+
+Required properties:
+
+- compatible: must be "mediatek,reserve-memory-cam_smem"
+
+- reg: required for static allocation (see reserved-memory.txt for
+ the detailed usage)
+
+- alloc-range: required for dynamic allocation. The range must
+ between 0x00000400 and 0x100000000 due to the co-processer's
+ addressing limitation
+
+- size: required for dynamic allocation. The unit is bytes.
+
+
+Example:
+
+The following example shows the ISP Pass1 shared memory setup for MT8183.
+
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ reserve-memory-cam_smem {
+ compatible = "mediatek,reserve-memory-cam_smem";
+ size = <0 0x1400000>;
+ alignment = <0 0x1000>;
+ alloc-ranges = <0 0x40000000 0 0x50000000>;
+ };
+ };
--
1.9.1
next prev parent reply other threads:[~2019-02-05 6:43 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-05 6:42 [RFC PATCH V0 0/7] media: platform: Add support for ISP Pass 1 on mt8183 SoC Frederic Chen
2019-02-05 6:42 ` Frederic Chen [this message]
2019-02-05 6:42 ` [RFC PATCH V0 2/7] dts: arm64: mt8183: Add ISP Pass 1 shared memory node Frederic Chen
2019-02-05 6:42 ` [RFC PATCH V0 3/7] [media] dt-bindings: mt8183: Added CAM-SMEM dt-bindings Frederic Chen
2019-02-05 6:42 ` [RFC PATCH V0 4/7] [media] dt-bindings: mt8183: Added camera ISP Pass 1 dt-bindings Frederic Chen
2019-02-05 6:42 ` [RFC PATCH V0 5/7] dts: arm64: mt8183: Add ISP Pass 1 nodes Frederic Chen
2019-02-05 6:42 ` [RFC PATCH V0 6/7] media: platform: Add Mediatek ISP Pass 1 driver KConfig Frederic Chen
2019-02-05 6:42 ` [RFC PATCH V0 7/7] [media] platform: mtk-isp: Add Mediatek ISP Pass 1 driver Frederic Chen
2019-02-13 9:50 ` Tomasz Figa
2019-02-17 2:56 ` Jungo Lin
2019-02-19 8:51 ` Tomasz Figa
2019-02-20 7:31 ` Jungo Lin
2019-03-21 3:33 ` Tomasz Figa
2019-03-22 0:00 ` Jungo Lin
2019-03-07 10:04 ` Tomasz Figa
2019-03-12 8:16 ` Jungo Lin
2019-03-21 3:45 ` Tomasz Figa
2019-03-22 0:13 ` Jungo Lin
2019-03-21 3:48 ` Tomasz Figa
2019-03-22 0:17 ` Jungo Lin
2019-03-12 10:04 ` Tomasz Figa
2019-03-13 6:54 ` Jungo Lin
2019-03-21 3:59 ` Tomasz Figa
2019-03-22 2:20 ` Jungo Lin
2019-03-25 7:12 ` Tomasz Figa
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