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IronPort-SDR: F+OTQJkOcALkc56/1F0ce+Mj4oEHahp/IP6nD1lGxlzSxo8Tf7zP/IwSR2u3LPQMXRPAPZJj4o E+QL2z/A2o8vIsgbD8viXhgKZMPmscURXX7VKGdVhSu/AspanlJqwdyXx9ogF9yVjC4/nkyyXc 9II+gsQ+YA3ABXQkCEYUaFcp52Pc7mNRvDM52EfaiISSVUcMK3+kYcpUvX0tpAeRuoYwSbxK5s LuyMODFAYxVFmbVrJtddlUC4VjJZfszh+yQiI9BA1V+SXd5pOqTeGx9+l+9qBNGIzMnxJHvzSs Z/Q= X-IronPort-AV: E=Sophos;i="5.75,307,1589266800"; d="scan'208";a="86113067" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa1.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 03 Jul 2020 00:46:43 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Fri, 3 Jul 2020 00:46:43 -0700 Received: from ROB-ULT-M18282.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Fri, 3 Jul 2020 00:46:19 -0700 From: Eugen Hristev To: , , , , , , Subject: [PATCH v2 1/4] dt-bindings: media: csi2dc: add bindings for microchip csi2dc Date: Fri, 3 Jul 2020 10:44:13 +0300 Message-ID: <20200703074416.55272-2-eugen.hristev@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200703074416.55272-1-eugen.hristev@microchip.com> References: <20200703074416.55272-1-eugen.hristev@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200703_034648_391958_670A6EC3 X-CRM114-Status: GOOD ( 16.59 ) X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [68.232.147.91 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H4 RBL: Very Good reputation (+4) [68.232.147.91 listed in wl.mailspike.net] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eugen Hristev Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Add bindings documentation for microchip CSI2 Demultiplexer controller. CSI2DC is a demultiplexer from Synopsys IDI interface specification to parallel interface connection or direct memory access. Signed-off-by: Eugen Hristev --- Changes in v2: - fixed warnings reported by dt_binding_check .../bindings/media/microchip,csi2dc.yaml | 185 ++++++++++++++++++ 1 file changed, 185 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/microchip,csi2dc.yaml diff --git a/Documentation/devicetree/bindings/media/microchip,csi2dc.yaml b/Documentation/devicetree/bindings/media/microchip,csi2dc.yaml new file mode 100644 index 000000000000..b7c46f7ad2a4 --- /dev/null +++ b/Documentation/devicetree/bindings/media/microchip,csi2dc.yaml @@ -0,0 +1,185 @@ +# SPDX-License-Identifier: GPL-2.0-only +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/media/microchip,csi2dc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Microchip CSI2 Demux Controller (CSI2DC) + +maintainers: + - Eugen Hristev + +description: + CSI2DC - Camera Serial Interface 2 Demux Controller + + CSI2DC is a hardware block that receives incoming data from an IDI interface + and filters packets based on their data type and virtual channel identifier, + then converts the byte stream into a cross clock domain to a pixel stream + to a parallel interface that can be read by a sensor controller. + + CSI2DC provides two pipes, one video pipe and one data pipe. Video pipe + is connected to a sensor controller and the data pipe is accessible + as a DMA slave port to a DMA controller. + + CSI2DC supports a single 'port' node as a source pad with Synopsys 32-bit + IDI interface. The connected endpoint must be a IDI interface compatible + device (like Synopsys CSI2HOST) , that can provide 32-bit IDI interface + connection as sink pad. + It should contain one 'port' child node with one child 'endpoint' node. + This node should always have the 'reg' property as 0, being the first child + node. + For media entity and endpoints please refer to the bindings defined in + Documentation/devicetree/bindings/media/video-interfaces.txt. + For Synopsys IDI interface please refer to + Documentation/devicetree/bindings/media/snps,dw-csi-plat.txt + + CSI2DC supports one 'port' node as sink pad with parallel interface. This is + called video pipe. + The reg property inside this 'port' node must have the 'reg' property as 1, + being the second child node. + This node must have one 'endpoint', and this 'endpoint' is related to the + virtual channel identifier. + The 'reg' property inside this 'endpoint' represents the CSI2 virtual channel + identifier. + This 'endpoint' can then be used as a source pad for another controller + (next in pipeline). + Please refer to the bindings defined in + Documentation/devicetree/bindings/media/video-interfaces.txt. + + CSI2DC must have two clocks to function correctly. One clock is the + peripheral clock for the inside functionality of the hardware block. + This is named 'pclk'. The second clock must be the cross domain clock, + in which CSI2DC will perform clock crossing. This clock must be fed + by the next controller in pipeline, which usually is a sensor controller. + Normally this clock should be given by this sensor controller who + is also a clock source. This clock is named 'scck', sensor controller clock. + + CSI2DC also supports direct access to the data through AHB, via DMA channel, + called data pipe. + Because of this, the sink 'port' child node (second) is not mandatory. + If the sink 'port' child node is missing, only data pipe is available. + +properties: + compatible: + const: microchip,sama7g5-csi2dc + + reg: + description: + Physical base address and length of the registers set for the device. + maxItems: 1 + + clocks: + maxItems: 2 + + clock-names: + items: + - const: pclk + - const: scck + + microchip,clk-gated: + type: boolean + description: + If present, indicates that the clock is gated. + Otherwise, the clock is free-running. + + microchip,inter-line-delay: + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + - minimum: 1 + - maximum: 16 + default: 16 + description: + Indicates how many clock cycles should be introduced between each line. + + port@0: + type: object + description: + Input port node, single endpoint describing the input pad. + + properties: + reg: + const: 0 + + endpoint: + type: object + + properties: + remote-endpoint: true + + required: + - remote-endpoint + + additionalProperties: false + + additionalProperties: false + + port@1: + type: object + description: + Output port node, single endpoint, describing the output pad. + + properties: + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + reg: + const: 1 + + patternProperties: + "^endpoint@[0-9a-f]$": + type: object + + properties: + reg: + enum: [0, 1, 2, 3] + description: virtual channel for the endpoint + + remote-endpoint: true + + required: + - remote-endpoint + - reg + + additionalProperties: false + + additionalProperties: false + +required: + - compatible + - reg + - clocks + - clock-names + - port@0 + +examples: + - | + csi2dc@e1404000 { + compatible = "microchip,sama7g5-csi2dc"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0xe1404000 0x500>; + clocks = <&pclk>, <&scck>; + clock-names = "pclk", "scck"; + + port@0 { + reg = <0>; /* must be 0, first child port */ + csi2dc_in: endpoint { /* input from IDI interface */ + remote-endpoint = <&csi2host_out>; + }; + }; + + port@1 { + #address-cells = <1>; + #size-cells = <0>; + reg = <1>; /* must be 1, second child port */ + csi2dc_out: endpoint@2 { + reg = <2>; /* virtual channel identifier */ + remote-endpoint = <&xisc_in>; /* output to sensor controller */ + }; + }; + }; + +... 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Signed-off-by: Eugen Hristev --- drivers/media/Kconfig | 1 + drivers/media/Makefile | 2 +- drivers/media/misc/Kconfig | 13 +++++++++++++ drivers/media/misc/Makefile | 1 + 4 files changed, 16 insertions(+), 1 deletion(-) create mode 100644 drivers/media/misc/Kconfig create mode 100644 drivers/media/misc/Makefile diff --git a/drivers/media/Kconfig b/drivers/media/Kconfig index a6d073f2e036..99d842fc63ce 100644 --- a/drivers/media/Kconfig +++ b/drivers/media/Kconfig @@ -258,6 +258,7 @@ source "drivers/media/i2c/Kconfig" source "drivers/media/spi/Kconfig" source "drivers/media/tuners/Kconfig" source "drivers/media/dvb-frontends/Kconfig" +source "drivers/media/misc/Kconfig" endmenu diff --git a/drivers/media/Makefile b/drivers/media/Makefile index d18357bf1346..d7545d090f5b 100644 --- a/drivers/media/Makefile +++ b/drivers/media/Makefile @@ -29,6 +29,6 @@ obj-$(CONFIG_CEC_CORE) += cec/ # Finally, merge the drivers that require the core # -obj-y += common/ platform/ pci/ usb/ mmc/ firewire/ spi/ test-drivers/ +obj-y += common/ platform/ pci/ usb/ mmc/ firewire/ spi/ test-drivers/ misc/ obj-$(CONFIG_VIDEO_DEV) += radio/ diff --git a/drivers/media/misc/Kconfig b/drivers/media/misc/Kconfig new file mode 100644 index 000000000000..206f39f86f46 --- /dev/null +++ b/drivers/media/misc/Kconfig @@ -0,0 +1,13 @@ +# +# Multimedia Video Miscellaneous device configuration +# + +if VIDEO_V4L2 + +menu "Miscellaneous helper chips" + +comment "Various helper chips" + +endmenu + +endif diff --git a/drivers/media/misc/Makefile b/drivers/media/misc/Makefile new file mode 100644 index 000000000000..f66554cd5c45 --- /dev/null +++ b/drivers/media/misc/Makefile @@ -0,0 +1 @@ +# SPDX-License-Identifier: GPL-2.0 From patchwork Fri Jul 3 07:44:15 2020 Content-Type: text/plain; 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IronPort-SDR: S/y9nnHw5HyjGn2/srNs/yxxmjGNYPqRwCjpPmmUCD/0V/PsdUJuZLHr8Lh9Vbk5HKFknuB2MK bccuSfdo9wTxFtVQ1LM7esffyC3dxqK6R8JE/NrgFqee1gaS7CXDMqyXltRTO1onoYJQIen/Df r7CFAUbWuP2bQwVsMDqgj1ESuzpHbL6+rAMEzlvoytAckFrfkL9HJTfAJT1i3WvhRBP0q9lax7 sgiSAw7Pjxmkgy6pso4wDXovhcLr4LwDJnD+jP9Y2Jp/5tbCmAw9glb08FcIK5dFcLSKNK4aPh SNY= X-IronPort-AV: E=Sophos;i="5.75,307,1589266800"; d="scan'208";a="17928873" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 03 Jul 2020 00:46:52 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.87.72) by chn-vm-ex02.mchp-main.com (10.10.87.72) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Fri, 3 Jul 2020 00:46:30 -0700 Received: from ROB-ULT-M18282.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Fri, 3 Jul 2020 00:46:27 -0700 From: Eugen Hristev To: , , , , , , Subject: [PATCH v2 3/4] media: misc: introduce microchip_csi2dc driver Date: Fri, 3 Jul 2020 10:44:15 +0300 Message-ID: <20200703074416.55272-4-eugen.hristev@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200703074416.55272-1-eugen.hristev@microchip.com> References: <20200703074416.55272-1-eugen.hristev@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200703_034655_176618_DEACB4E7 X-CRM114-Status: GOOD ( 21.36 ) X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [216.71.154.253 listed in wl.mailspike.net] -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [216.71.154.253 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eugen Hristev Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Microchip CSI2DC (CSI2 Demultiplexer Controller) is a misc bridge device that converts a byte stream in IDI Synopsys format (coming from a CSI2HOST) to a pixel stream that can be captured by a sensor controller. Signed-off-by: Eugen Hristev --- drivers/media/misc/Kconfig | 9 + drivers/media/misc/Makefile | 1 + drivers/media/misc/microchip_csi2dc.c | 705 ++++++++++++++++++++++++++ 3 files changed, 715 insertions(+) create mode 100644 drivers/media/misc/microchip_csi2dc.c diff --git a/drivers/media/misc/Kconfig b/drivers/media/misc/Kconfig index 206f39f86f46..86e892a41eba 100644 --- a/drivers/media/misc/Kconfig +++ b/drivers/media/misc/Kconfig @@ -8,6 +8,15 @@ menu "Miscellaneous helper chips" comment "Various helper chips" +config VIDEO_MICROCHIP_CSI2DC + tristate "Microchip CSI2 Demux Controller" + depends on VIDEO_V4L2 + help + CSI2 Demux Controller driver. CSI2DC is a helper chip + that converts IDI interface byte stream to a parallel pixel stream. + It supports various RAW formats as input. + Performs clock domain crossing between hardware blocks. + endmenu endif diff --git a/drivers/media/misc/Makefile b/drivers/media/misc/Makefile index f66554cd5c45..86477781b7af 100644 --- a/drivers/media/misc/Makefile +++ b/drivers/media/misc/Makefile @@ -1 +1,2 @@ # SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_VIDEO_MICROCHIP_CSI2DC) += microchip_csi2dc.o diff --git a/drivers/media/misc/microchip_csi2dc.c b/drivers/media/misc/microchip_csi2dc.c new file mode 100644 index 000000000000..494b7c137b17 --- /dev/null +++ b/drivers/media/misc/microchip_csi2dc.c @@ -0,0 +1,705 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Microchip CSI2 Demux Controller (CSI2DC) driver + * + * Copyright (C) 2018-2020 Microchip Technology, Inc. + * + * Author: Eugen Hristev + * + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +/* Global configuration register */ +#define CSI2DC_GCFG 0x0 + +/* MIPI sensor pixel clock is free running */ +#define CSI2DC_GCFG_MIPIFRN BIT(0) +/* Output waveform inter-line minimum delay */ +#define CSI2DC_GCFG_HLC(v) ((v) << 4) +#define CSI2DC_GCFG_HLC_MASK GENMASK(7, 4) + +/* Global control register */ +#define CSI2DC_GCTLR 0x04 +#define CSI2DC_GCTLR_SWRST BIT(0) + +/* Global status register */ +#define CSI2DC_GS 0x08 + +/* SSP interrupt status register */ +#define CSI2DC_SSPIS 0x28 +/* Pipe update register */ +#define CSI2DC_PU 0xC0 +/* Video pipe attributes update */ +#define CSI2DC_PU_VP BIT(0) + +/* Pipe update status register */ +#define CSI2DC_PUS 0xC4 + +/* Video pipeline enable register */ +#define CSI2DC_VPE 0xF8 +#define CSI2DC_VPE_ENABLE BIT(0) + +/* Video pipeline configuration register */ +#define CSI2DC_VPCFG 0xFC +/* Data type */ +#define CSI2DC_VPCFG_DT(v) ((v) << 0) +#define CSI2DC_VPCFG_DT_MASK GENMASK(5, 0) +/* Virtual channel identifier */ +#define CSI2DC_VPCFG_VC(v) ((v) << 6) +#define CSI2DC_VPCFG_VC_MASK GENMASK(7, 6) +/* Decompression enable */ +#define CSI2DC_VPCFG_DE BIT(8) +/* Decoder mode */ +#define CSI2DC_VPCFG_DM(v) ((v) << 9) +#define CSI2DC_VPCFG_DM_DECODER8TO12 0 +/* Decoder predictor 2 selection */ +#define CSI2DC_VPCFG_DP2 BIT(12) +/* Recommended memory storage */ +#define CSI2DC_VPCFG_RMS BIT(13) +/* Post adjustment */ +#define CSI2DC_VPCFG_PA BIT(14) + +/* Video pipeline column register */ +#define CSI2DC_VPCOL 0x100 +/* Column number */ +#define CSI2DC_VPCOL_COL(v) ((v) << 0) +#define CSI2DC_VPCOL_COL_MASK GENMASK(15, 0) + +/* Video pipeline row register */ +#define CSI2DC_VPROW 0x104 +/* Row number */ +#define CSI2DC_VPROW_ROW(v) ((v) << 0) +#define CSI2DC_VPROW_ROW_MASK GENMASK(15, 0) + +/* Version register */ +#define CSI2DC_VERSION 0x1FC + +/* register read/write helpers */ +#define csi2dc_readl(st, reg) readl_relaxed((st)->base + (reg)) +#define csi2dc_writel(st, reg, val) writel_relaxed((val), (st)->base + (reg)) + +/* supported RAW data types */ +#define CSI2DC_DT_RAW6 0x28 +#define CSI2DC_DT_RAW7 0x29 +#define CSI2DC_DT_RAW8 0x2A +#define CSI2DC_DT_RAW10 0x2B +#define CSI2DC_DT_RAW12 0x2C +#define CSI2DC_DT_RAW14 0x2D + +struct csi2dc_format { + u32 mbus_code; + u32 dt; +}; + +static struct csi2dc_format csi2dc_formats_list[] = { + { + .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10, + .dt = CSI2DC_DT_RAW10, + }, +}; + +enum mipi_csi_pads { + CSI2DC_PAD_SINK = 0, + CSI2DC_PAD_SOURCE = 1, + CSI2DC_PADS_NUM = 2, +}; + +struct csi2dc_device { + void __iomem *base; + struct v4l2_subdev csi2dc_sd; + struct device *dev; + struct v4l2_device v4l2_dev; + struct clk *pclk; + struct clk *scck; + + bool video_pipe; + + u32 num_fmts; + struct csi2dc_format **formats; + + struct csi2dc_format *cur_fmt; + struct csi2dc_format *try_fmt; + + struct media_pad pads[CSI2DC_PADS_NUM]; + + bool clk_gated; + u32 inter_line_delay; + u32 vc; + + struct v4l2_async_subdev *asd; + struct v4l2_async_notifier notifier; + + struct v4l2_subdev *input_sd; + bool completed; +}; + +static void csi2dc_vp_update(struct csi2dc_device *csi2dc) +{ + u32 vp; + + vp = CSI2DC_VPCFG_DT(csi2dc->cur_fmt->dt) & CSI2DC_VPCFG_DT_MASK; + vp |= CSI2DC_VPCFG_VC(csi2dc->vc) & CSI2DC_VPCFG_VC_MASK; + vp &= ~CSI2DC_VPCFG_DE; + vp |= CSI2DC_VPCFG_DM(CSI2DC_VPCFG_DM_DECODER8TO12); + vp &= ~CSI2DC_VPCFG_DP2; + vp &= ~CSI2DC_VPCFG_RMS; + vp |= CSI2DC_VPCFG_PA; + + csi2dc_writel(csi2dc, CSI2DC_VPCFG, vp); + csi2dc_writel(csi2dc, CSI2DC_VPE, CSI2DC_VPE_ENABLE); + csi2dc_writel(csi2dc, CSI2DC_PU, CSI2DC_PU_VP); +} + +static inline struct csi2dc_device *csi2dc_sd_to_csi2dc_device + (struct v4l2_subdev *csi2dc_sd) +{ + return container_of(csi2dc_sd, struct csi2dc_device, csi2dc_sd); +} + +static int csi2dc_enum_mbus_code(struct v4l2_subdev *csi2dc_sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); + + if (code->index >= csi2dc->num_fmts) + return -EINVAL; + + code->code = csi2dc->formats[code->index]->mbus_code; + return 0; +} + +static int csi2dc_try_fmt(struct v4l2_subdev *csi2dc_sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *req_fmt) +{ + struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); + struct csi2dc_format *fmt; + + if (!csi2dc->completed) { + dev_dbg((csi2dc)->dev, "subdev not registered yet\n"); + return 0; + } + + for (fmt = csi2dc->formats[0]; fmt; fmt++) + if (req_fmt->format.code == fmt->mbus_code) + csi2dc->try_fmt = fmt; + + /* in case we could not find the desired format, default to something */ + if (!csi2dc->try_fmt || + req_fmt->format.code != csi2dc->try_fmt->mbus_code) { + csi2dc->try_fmt = csi2dc->formats[0]; + req_fmt->format.code = csi2dc->formats[0]->mbus_code; + } + + return v4l2_subdev_call(csi2dc->input_sd, pad, set_fmt, cfg, req_fmt); +} + +static int csi2dc_set_fmt(struct v4l2_subdev *csi2dc_sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *req_fmt) +{ + struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); + int ret; + + if (!csi2dc->completed) { + dev_dbg((csi2dc)->dev, "subdev not registered yet\n"); + return 0; + } + + csi2dc_try_fmt(csi2dc_sd, cfg, req_fmt); + + if (csi2dc->try_fmt->mbus_code != req_fmt->format.code) { + dev_dbg(csi2dc->dev, "CSI2DC unsupported format 0x%x\n", + req_fmt->format.code); + return -EINVAL; + } + + ret = v4l2_subdev_call(csi2dc->input_sd, pad, set_fmt, cfg, req_fmt); + if (ret) { + dev_err(csi2dc->dev, "input subdev failed %d\n", ret); + return ret; + } + + csi2dc->cur_fmt = csi2dc->try_fmt; + /* update video pipe */ + csi2dc_vp_update(csi2dc); + + dev_dbg(csi2dc->dev, "CSI2DC new format: 0x%x\n", req_fmt->format.code); + return 0; +} + +static int csi2dc_formats_init(struct csi2dc_device *csi2dc) +{ + int i, j; + struct csi2dc_format *fmt = &csi2dc_formats_list[0]; + + csi2dc->num_fmts = 1; + + csi2dc->formats = devm_kcalloc(csi2dc->dev, csi2dc->num_fmts, + sizeof(*csi2dc->formats), GFP_KERNEL); + + for (i = 0, j = 0; i < ARRAY_SIZE(csi2dc_formats_list); i++, fmt++) + if (fmt->mbus_code == MEDIA_BUS_FMT_SRGGB10_1X10) + csi2dc->formats[j++] = fmt; + return 0; +} + +static int csi2dc_s_power(struct v4l2_subdev *csi2dc_sd, int on) +{ + struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); + int ret = 0; + + if (!csi2dc->completed) { + dev_dbg((csi2dc)->dev, "subdev not registered yet\n"); + return 0; + } + + if (on) + ret = clk_prepare_enable(csi2dc->scck); + else + clk_disable_unprepare(csi2dc->scck); + if (ret) + dev_err(csi2dc->dev, "failed to enable scck: %d\n", ret); + + /* if powering up, deassert reset line */ + if (on) + csi2dc_writel(csi2dc, CSI2DC_GCTLR, CSI2DC_GCTLR_SWRST); + + ret = v4l2_subdev_call(csi2dc->input_sd, core, s_power, on); + + /* if powering down, assert reset line */ + if (!on) + csi2dc_writel(csi2dc, CSI2DC_GCTLR, !CSI2DC_GCTLR_SWRST); + + return ret; +} + +static int csi2dc_s_stream(struct v4l2_subdev *csi2dc_sd, int enable) +{ + struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); + + if (!csi2dc->completed) { + dev_dbg((csi2dc)->dev, "subdev not registered yet\n"); + return 0; + } + + return v4l2_subdev_call(csi2dc->input_sd, video, s_stream, enable); +} + +static int csi2dc_g_frame_interval(struct v4l2_subdev *csi2dc_sd, + struct v4l2_subdev_frame_interval *interval) +{ + struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); + + if (!csi2dc->completed) { + dev_dbg((csi2dc)->dev, "subdev not registered yet\n"); + return 0; + } + + return v4l2_subdev_call(csi2dc->input_sd, video, g_frame_interval, + interval); +} + +static int csi2dc_s_frame_interval(struct v4l2_subdev *csi2dc_sd, + struct v4l2_subdev_frame_interval *interval) +{ + struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); + + if (!csi2dc->completed) { + dev_dbg((csi2dc)->dev, "subdev not registered yet\n"); + return 0; + } + + return v4l2_subdev_call(csi2dc->input_sd, video, s_frame_interval, + interval); +} + +static int csi2dc_enum_frame_size(struct v4l2_subdev *csi2dc_sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_size_enum *fse) +{ + struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); + + if (!csi2dc->completed) { + dev_dbg((csi2dc)->dev, "subdev not registered yet\n"); + return 0; + } + + return v4l2_subdev_call(csi2dc->input_sd, pad, enum_frame_size, cfg, + fse); +} + +static int csi2dc_enum_frame_interval(struct v4l2_subdev *csi2dc_sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_interval_enum *fie) +{ + struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); + + if (!csi2dc->completed) { + dev_dbg((csi2dc)->dev, "subdev not registered yet\n"); + return 0; + } + + return v4l2_subdev_call(csi2dc->input_sd, pad, enum_frame_interval, cfg, + fie); +} + +static struct v4l2_subdev_core_ops csi2dc_core_ops = { + .s_power = csi2dc_s_power, +}; + +static struct v4l2_subdev_pad_ops csi2dc_pad_ops = { + .enum_mbus_code = csi2dc_enum_mbus_code, + .set_fmt = csi2dc_set_fmt, + .enum_frame_size = csi2dc_enum_frame_size, + .enum_frame_interval = csi2dc_enum_frame_interval, +}; + +static struct v4l2_subdev_video_ops csi2dc_video_ops = { + .s_stream = csi2dc_s_stream, + .g_frame_interval = csi2dc_g_frame_interval, + .s_frame_interval = csi2dc_s_frame_interval, +}; + +static struct v4l2_subdev_ops csi2dc_subdev_ops = { + .core = &csi2dc_core_ops, + .pad = &csi2dc_pad_ops, + .video = &csi2dc_video_ops, +}; + +static int csi2dc_async_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct csi2dc_device *csi2dc = container_of(notifier->v4l2_dev, + struct csi2dc_device, v4l2_dev); + csi2dc->input_sd = subdev; + + return 0; +} + +static int csi2dc_async_complete(struct v4l2_async_notifier *notifier) +{ + struct csi2dc_device *csi2dc = container_of(notifier->v4l2_dev, + struct csi2dc_device, v4l2_dev); + int ret; + + ret = v4l2_device_register_subdev_nodes(&csi2dc->v4l2_dev); + if (ret < 0) { + v4l2_err(&csi2dc->v4l2_dev, "failed to register subdev nodes\n"); + return ret; + } + + csi2dc_writel(csi2dc, CSI2DC_GCFG, + (CSI2DC_GCFG_HLC(csi2dc->inter_line_delay) & + CSI2DC_GCFG_HLC_MASK) | + (csi2dc->clk_gated ? 0 : CSI2DC_GCFG_MIPIFRN)); + + csi2dc_writel(csi2dc, CSI2DC_VPCOL, + CSI2DC_VPCOL_COL(0xFFF) & CSI2DC_VPCOL_COL_MASK); + csi2dc_writel(csi2dc, CSI2DC_VPROW, + CSI2DC_VPROW_ROW(0xFFF) & CSI2DC_VPROW_ROW_MASK); + + csi2dc->completed = true; + + return ret; +} + +static const struct v4l2_async_notifier_operations csi2dc_async_ops = { + .bound = csi2dc_async_bound, + .complete = csi2dc_async_complete, +}; + +static void csi2dc_cleanup_notifier(struct csi2dc_device *csi2dc) +{ + v4l2_async_notifier_unregister(&csi2dc->notifier); + v4l2_async_notifier_cleanup(&csi2dc->notifier); +} + +static int csi2dc_prepare_notifier(struct csi2dc_device *csi2dc, + struct device_node *input_parent) +{ + int ret; + + v4l2_async_notifier_init(&csi2dc->notifier); + + csi2dc->asd = kzalloc(sizeof(*csi2dc->asd), GFP_KERNEL); + if (!csi2dc->asd) + return -ENOMEM; + + csi2dc->asd->match_type = V4L2_ASYNC_MATCH_FWNODE; + csi2dc->asd->match.fwnode = of_fwnode_handle(input_parent); + + ret = v4l2_async_notifier_add_subdev(&csi2dc->notifier, csi2dc->asd); + if (ret) { + dev_err(csi2dc->dev, "failed to add async notifier.\n"); + v4l2_async_notifier_cleanup(&csi2dc->notifier); + goto csi2dc_prepare_notifier_err; + } + + csi2dc->notifier.ops = &csi2dc_async_ops; + + ret = v4l2_async_notifier_register(&csi2dc->v4l2_dev, + &csi2dc->notifier); + + if (ret) { + dev_err(csi2dc->dev, "fail to register async notifier.\n"); + goto csi2dc_prepare_notifier_err; + } + +csi2dc_prepare_notifier_err: + of_node_put(input_parent); + + return ret; +} + +static int csi2dc_of_parse(struct csi2dc_device *csi2dc, + struct device_node *of_node) +{ + struct device_node *input_node, *sink_node, *input_parent; + struct v4l2_fwnode_endpoint input_endpoint, sink_endpoint; + int ret; + + memset(&input_endpoint, 0, sizeof(input_endpoint)); + memset(&sink_endpoint, 0, sizeof(sink_endpoint)); + + input_node = of_graph_get_next_endpoint(of_node, NULL); + + if (!input_node) { + dev_err(csi2dc->dev, "missing port node at %s, input node is mandatory.\n", + of_node->full_name); + return -EINVAL; + } + + ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(input_node), + &input_endpoint); + + if (ret) { + dev_err(csi2dc->dev, "endpoint not defined at %s\n", + of_node->full_name); + return ret; + } + + input_parent = of_graph_get_remote_port_parent(input_node); + if (!input_parent) { + dev_err(csi2dc->dev, "could not get input node's parent node.\n"); + return -EINVAL; + } + + sink_node = of_graph_get_next_endpoint(of_node, input_node); + + if (sink_node) + ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(sink_node), + &sink_endpoint); + + if (!sink_node || ret) { + dev_info(csi2dc->dev, "missing sink node at %s, data pipe available only.\n", + of_node->full_name); + } else { + csi2dc->video_pipe = true; + csi2dc->vc = sink_endpoint.base.id; + + dev_dbg(csi2dc->dev, "block %s %d.%d->%d.%d video pipe VC %d\n", + of_node->full_name, input_endpoint.base.port, + input_endpoint.base.id, sink_endpoint.base.port, + sink_endpoint.base.id, csi2dc->vc); + } + + csi2dc->clk_gated = of_property_read_bool(of_node, + "microchip,clk-gated"); + + dev_dbg(csi2dc->dev, "%s clock\n", + (csi2dc->clk_gated ? "Gated" : "Free running")); + + ret = of_property_read_u32(of_node, "microchip,inter-line-delay", + &csi2dc->inter_line_delay); + + if (ret || csi2dc->inter_line_delay > 16) { + dev_dbg(csi2dc->dev, "assuming inter line delay = 16 clocks"); + csi2dc->inter_line_delay = 16; + ret = 0; + } + /* hardware automatically adds 1 */ + csi2dc->inter_line_delay--; + + /* prepare async notifier for subdevice completion */ + + if (sink_node) + of_node_put(sink_node); + of_node_put(input_node); + + return csi2dc_prepare_notifier(csi2dc, input_parent); +} + +static int csi2dc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct csi2dc_device *csi2dc; + struct resource *res = NULL; + int ret = 0; + + csi2dc = devm_kzalloc(dev, sizeof(*csi2dc), GFP_KERNEL); + if (!csi2dc) + return -ENOMEM; + + csi2dc->dev = dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; + + csi2dc->base = devm_ioremap_resource(dev, res); + + if (IS_ERR(csi2dc->base)) { + dev_err(dev, "base address not set\n"); + return PTR_ERR(csi2dc->base); + } + + csi2dc->pclk = devm_clk_get(dev, "pclk"); + if (IS_ERR(csi2dc->pclk)) { + ret = PTR_ERR(csi2dc->pclk); + dev_err(dev, "failed to get pclk: %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(csi2dc->pclk); + if (ret) { + dev_err(dev, "failed to enable pclk: %d\n", ret); + return ret; + } + + csi2dc->scck = devm_clk_get(dev, "scck"); + if (IS_ERR(csi2dc->scck)) { + ret = PTR_ERR(csi2dc->scck); + dev_err(dev, "failed to get scck: %d\n", ret); + goto csi2dc_clk_fail; + } + + ret = v4l2_device_register(dev, &csi2dc->v4l2_dev); + if (ret) { + dev_err(dev, "unable to register v4l2 device.\n"); + goto csi2dc_clk_fail; + } + + v4l2_subdev_init(&csi2dc->csi2dc_sd, &csi2dc_subdev_ops); + + csi2dc->csi2dc_sd.owner = THIS_MODULE; + + csi2dc->csi2dc_sd.dev = dev; + snprintf(csi2dc->csi2dc_sd.name, sizeof(csi2dc->csi2dc_sd.name), + "%s.%d", "CSI2DC", 0); + + csi2dc->csi2dc_sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + csi2dc->csi2dc_sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE; + csi2dc->pads[CSI2DC_PAD_SINK].flags = MEDIA_PAD_FL_SINK; + csi2dc->pads[CSI2DC_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE; + + ret = media_entity_pads_init(&csi2dc->csi2dc_sd.entity, CSI2DC_PADS_NUM, + csi2dc->pads); + if (ret < 0) { + dev_err(dev, "media entity init failed\n"); + goto csi2dc_probe_entity_err; + } + + v4l2_set_subdevdata(&csi2dc->csi2dc_sd, pdev); + + platform_set_drvdata(pdev, &csi2dc->csi2dc_sd); + + ret = csi2dc_of_parse(csi2dc, dev->of_node); + if (ret) + goto csi2dc_probe_entity_err; + + ret = csi2dc_formats_init(csi2dc); + if (ret) + goto csi2dc_probe_error; + + ret = v4l2_async_register_subdev(&csi2dc->csi2dc_sd); + if (ret) { // ret = -EPROBE_DEFER; + goto csi2dc_probe_error; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_request_idle(dev); + + pr_info("Microchip CSI2DC version %x\n", + csi2dc_readl(csi2dc, CSI2DC_VERSION)); + + return 0; + +csi2dc_probe_error: + v4l2_async_unregister_subdev(&csi2dc->csi2dc_sd); + csi2dc_cleanup_notifier(csi2dc); + +csi2dc_probe_entity_err: + media_entity_cleanup(&csi2dc->csi2dc_sd.entity); + v4l2_device_unregister(&csi2dc->v4l2_dev); +csi2dc_clk_fail: + clk_disable_unprepare(csi2dc->pclk); + return ret; +} + +static int csi2dc_remove(struct platform_device *pdev) +{ + struct v4l2_subdev *csi2dc_sd = platform_get_drvdata(pdev); + struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); + + pm_runtime_disable(&pdev->dev); + csi2dc_cleanup_notifier(csi2dc); + media_entity_cleanup(&csi2dc->csi2dc_sd.entity); + v4l2_device_unregister(&csi2dc->v4l2_dev); + clk_disable_unprepare(csi2dc->pclk); + + return 0; +} + +static int __maybe_unused csi2dc_runtime_suspend(struct device *dev) +{ + return 0; +} + +static int __maybe_unused csi2dc_runtime_resume(struct device *dev) +{ + return 0; +} + +static const struct dev_pm_ops csi2dc_dev_pm_ops = { + SET_RUNTIME_PM_OPS(csi2dc_runtime_suspend, csi2dc_runtime_resume, NULL) +}; + +static const struct of_device_id csi2dc_of_match[] = { + { .compatible = "microchip,sama7g5-csi2dc" }, + { } +}; + +MODULE_DEVICE_TABLE(of, csi2dc_of_match); + +static struct platform_driver csi2dc_driver = { + .probe = csi2dc_probe, + .remove = csi2dc_remove, + .driver = { + .name = "microchip-csi2dc", + .pm = &csi2dc_dev_pm_ops, + .of_match_table = of_match_ptr(csi2dc_of_match), + }, +}; + +module_platform_driver(csi2dc_driver); + +MODULE_AUTHOR("Eugen Hristev "); +MODULE_DESCRIPTION("Microchip CSI2 Demux Controller driver"); +MODULE_LICENSE("GPL v2"); +MODULE_SUPPORTED_DEVICE("video"); From patchwork Fri Jul 3 07:44:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eugen Hristev X-Patchwork-Id: 11641065 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7DE7914E3 for ; Fri, 3 Jul 2020 07:49:11 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5627421527 for ; 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Fri, 3 Jul 2020 00:46:35 -0700 Received: from ROB-ULT-M18282.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Fri, 3 Jul 2020 00:46:31 -0700 From: Eugen Hristev To: , , , , , , Subject: [PATCH v2 4/4] MAINTAINERS: add microchip csi2dc Date: Fri, 3 Jul 2020 10:44:16 +0300 Message-ID: <20200703074416.55272-5-eugen.hristev@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200703074416.55272-1-eugen.hristev@microchip.com> References: <20200703074416.55272-1-eugen.hristev@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200703_034658_338927_AFDBF92E X-CRM114-Status: UNSURE ( 5.74 ) X-CRM114-Notice: Please train this message. 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Signed-off-by: Eugen Hristev --- MAINTAINERS | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 791d2a862e41..a65b8d28c7d2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11069,6 +11069,13 @@ L: alsa-devel@alsa-project.org (moderated for non-subscribers) S: Supported F: sound/soc/atmel +MICROCHIP CSI2DC DRIVER +M: Eugen Hristev +L: linux-media@vger.kernel.org +S: Supported +F: Documentation/devicetree/bindings/media/microchip,csi2dc.yaml +F: drivers/media/misc/microchip_csi2dc.c + MICROCHIP DMA DRIVER M: Ludovic Desroches L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)