From patchwork Fri Jan 21 01:05:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar X-Patchwork-Id: 12719210 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7B70AC43219 for ; Fri, 21 Jan 2022 01:06:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233999AbiAUBGJ (ORCPT ); Thu, 20 Jan 2022 20:06:09 -0500 Received: from relmlor1.renesas.com ([210.160.252.171]:18363 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229499AbiAUBGJ (ORCPT ); Thu, 20 Jan 2022 20:06:09 -0500 X-IronPort-AV: E=Sophos;i="5.88,303,1635174000"; d="scan'208";a="107143417" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie5.idc.renesas.com with ESMTP; 21 Jan 2022 10:06:05 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 1E528417762A; Fri, 21 Jan 2022 10:06:01 +0900 (JST) From: Lad Prabhakar To: =?utf-8?q?Niklas_S=C3=B6derlund?= , Jacopo Mondi , Philipp Zabel , Mauro Carvalho Chehab , Rob Herring , Laurent Pinchart , Sakari Ailus , Hans Verkuil Cc: Geert Uytterhoeven , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [RFC PATCH v2 1/4] media: dt-bindings: media: Document RZ/G2L CSI-2 block Date: Fri, 21 Jan 2022 01:05:40 +0000 Message-Id: <20220121010543.31385-2-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220121010543.31385-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20220121010543.31385-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Document the CSI-2 block which is part of CRU found in Renesas RZ/G2L SoC. Signed-off-by: Lad Prabhakar --- Hi Geert/All, vclk and pclk clocks are shared with CRU both CSI and CRU driver are using pm_runtime. pclk clock is necessary for register access where as vclk clock is only used for calculations. So would you suggest passing vclk as part of clocks (as currently implemented) or pass the vclk clock rate as a dt property. Cheers, Prabhakar v1->v2 * New patch --- .../bindings/media/renesas,rzg2l-csi2.yaml | 151 ++++++++++++++++++ 1 file changed, 151 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml diff --git a/Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml b/Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml new file mode 100644 index 000000000000..bf907768a157 --- /dev/null +++ b/Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml @@ -0,0 +1,151 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright (C) 2022 Renesas Electronics Corp. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/media/renesas,rzg2l-csi2.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Renesas RZ/G2L MIPI CSI-2 receiver + +maintainers: + - Lad Prabhakar + +description: + The RZ/G2L CSI-2 receiver device provides MIPI CSI-2 capabilities for the + Renesas RZ/G2L family of devices. MIPI CSI-2 is part of the CRU block which + is used in conjunction with the Image Processing module, which provides the + video capture capabilities. + +properties: + compatible: + oneOf: + - items: + - enum: + - renesas,r9a07g044-csi2 # RZ/G2{L,LC} + - const: renesas,rzg2l-csi2 + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + interrupt-names: + items: + - const: csi2_link + + clocks: + items: + - description: Internal clock for connecting CRU and MIPI + - description: CRU Main clock + - description: CPU Register access clock + + clock-names: + items: + - const: sysclk + - const: vclk + - const: pclk + + power-domains: + maxItems: 1 + + resets: + items: + - description: CRU_CMN_RSTB reset terminal + + reset-names: + items: + - const: cmn-rstb + + ports: + $ref: /schemas/graph.yaml#/properties/ports + + properties: + port@0: + $ref: /schemas/graph.yaml#/$defs/port-base + unevaluatedProperties: false + description: + Input port node, single endpoint describing the CSI-2 transmitter. + + properties: + endpoint: + $ref: video-interfaces.yaml# + unevaluatedProperties: false + + properties: + data-lanes: + minItems: 1 + maxItems: 4 + items: + maximum: 4 + + required: + - clock-lanes + - data-lanes + + port@1: + $ref: /schemas/graph.yaml#/properties/port + description: + Output port node, Image Processing block connected to the CSI-2 receiver. + + required: + - port@0 + - port@1 + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + - power-domains + - resets + - reset-names + - ports + +additionalProperties: false + +examples: + - | + #include + #include + + csi20: csi2@10830400 { + compatible = "renesas,r9a07g044-csi2", "renesas,rzg2l-csi2"; + reg = <0x10830400 0xfc00>; + interrupts = ; + clocks = <&cpg CPG_MOD R9A07G044_CRU_SYSCLK>, + <&cpg CPG_MOD R9A07G044_CRU_VCLK>, + <&cpg CPG_MOD R9A07G044_CRU_PCLK>; + clock-names = "sysclk", "vclk", "pclk"; + power-domains = <&cpg>; + resets = <&cpg R9A07G044_CRU_CMN_RSTB>; + reset-names = "cmn-rstb"; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + + csi2_in: endpoint { + clock-lanes = <0>; + data-lanes = <1 2>; + remote-endpoint = <&ov5645_ep>; + }; + }; + + port@1 { + #address-cells = <1>; + #size-cells = <0>; + + reg = <1>; + + csi2cru: endpoint@0 { + reg = <0>; + remote-endpoint = <&crucsi2>; + }; + }; + }; + }; From patchwork Fri Jan 21 01:05:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar X-Patchwork-Id: 12719211 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 94B4AC4167D for ; Fri, 21 Jan 2022 01:06:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229499AbiAUBGN (ORCPT ); Thu, 20 Jan 2022 20:06:13 -0500 Received: from relmlor1.renesas.com ([210.160.252.171]:11183 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S233641AbiAUBGJ (ORCPT ); Thu, 20 Jan 2022 20:06:09 -0500 X-IronPort-AV: E=Sophos;i="5.88,303,1635174000"; d="scan'208";a="107143426" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie5.idc.renesas.com with ESMTP; 21 Jan 2022 10:06:08 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 925BF417762A; Fri, 21 Jan 2022 10:06:05 +0900 (JST) From: Lad Prabhakar To: =?utf-8?q?Niklas_S=C3=B6derlund?= , Jacopo Mondi , Philipp Zabel , Mauro Carvalho Chehab , Rob Herring , Laurent Pinchart , Sakari Ailus , Hans Verkuil Cc: Geert Uytterhoeven , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [RFC PATCH v2 2/4] media: dt-bindings: media: Document RZ/G2L CRU Date: Fri, 21 Jan 2022 01:05:41 +0000 Message-Id: <20220121010543.31385-3-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220121010543.31385-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20220121010543.31385-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Document the CRU block found on Renesas RZ/G2L SoC's. Signed-off-by: Lad Prabhakar --- v1->v2 * Dropped CSI --- .../bindings/media/renesas,rzg2l-cru.yaml | 152 ++++++++++++++++++ 1 file changed, 152 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/renesas,rzg2l-cru.yaml diff --git a/Documentation/devicetree/bindings/media/renesas,rzg2l-cru.yaml b/Documentation/devicetree/bindings/media/renesas,rzg2l-cru.yaml new file mode 100644 index 000000000000..a03fc6ef0117 --- /dev/null +++ b/Documentation/devicetree/bindings/media/renesas,rzg2l-cru.yaml @@ -0,0 +1,152 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright (C) 2022 Renesas Electronics Corp. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/media/renesas,rzg2l-cru.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Renesas RZ/G2L Camera Data Receiving Unit (CRU) + +maintainers: + - Lad Prabhakar + +description: + The RZ/G2L Camera Data Receiving Unit (CRU) device provides video input + capabilities for the Renesas RZ/G2L family of devices. + + Depending on the instance the Image Processing input is connected to + external SoC pins or to a CSI-2 receiver. + +properties: + compatible: + oneOf: + - items: + - enum: + - renesas,r9a07g044-cru # RZ/G2{L,LC} + - const: renesas,rzg2l-cru + + reg: + maxItems: 1 + + interrupts: + maxItems: 3 + + interrupt-names: + items: + - const: image_conv + - const: image_conv_err + - const: axi_mst_err + + clocks: + items: + - description: CRU Main clock + - description: CPU Register access clock + - description: CRU image transfer clock + + clock-names: + items: + - const: vclk + - const: pclk + - const: aclk + + power-domains: + maxItems: 1 + + resets: + items: + - description: CRU_PRESETN reset terminal + - description: CRU_ARESETN reset terminal + + reset-names: + items: + - const: presetn + - const: aresetn + + ports: + $ref: /schemas/graph.yaml#/properties/ports + + properties: + port@0: + $ref: /schemas/graph.yaml#/$defs/port-base + unevaluatedProperties: false + description: + Input port node, single endpoint describing a parallel input source. + + properties: + endpoint: + $ref: video-interfaces.yaml# + unevaluatedProperties: false + + properties: + hsync-active: true + vsync-active: true + bus-width: true + data-shift: true + + port@1: + $ref: /schemas/graph.yaml#/properties/port + description: + Output port node, describing the RZ/G2L Image Processing module + connected the CSI-2 receiver + + properties: + endpoint@0: + $ref: /schemas/graph.yaml#/properties/endpoint + description: Endpoint connected to CSI2. + + anyOf: + - required: + - endpoint@0 + +required: + - compatible + - reg + - interrupts + - interrupt-names + - clocks + - clock-names + - resets + - reset-names + - power-domains + +additionalProperties: false + +examples: + # Device node example with CSI-2 + - | + #include + #include + + cru: video@10830000 { + compatible = "renesas,r9a07g044-cru", "renesas,rzg2l-cru"; + reg = <0x10830000 0x400>; + interrupts = , + , + ; + interrupt-names = "image_conv", "image_conv_err", "axi_mst_err"; + clocks = <&cpg CPG_MOD R9A07G044_CRU_VCLK>, + <&cpg CPG_MOD R9A07G044_CRU_PCLK>, + <&cpg CPG_MOD R9A07G044_CRU_ACLK>; + clock-names = "vclk", "pclk", "aclk"; + power-domains = <&cpg>; + resets = <&cpg R9A07G044_CRU_PRESETN>, + <&cpg R9A07G044_CRU_ARESETN>; + reset-names = "presetn", "aresetn"; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@1 { + #address-cells = <1>; + #size-cells = <0>; + + reg = <1>; + + crucsi2: endpoint@0 { + reg = <0>; + remote-endpoint= <&csi2cru>; + }; + }; + }; + }; From patchwork Fri Jan 21 01:05:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar X-Patchwork-Id: 12719212 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D1DC3C2BA4C for ; Fri, 21 Jan 2022 01:06:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235648AbiAUBGR (ORCPT ); Thu, 20 Jan 2022 20:06:17 -0500 Received: from relmlor2.renesas.com ([210.160.252.172]:19483 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S235588AbiAUBGP (ORCPT ); Thu, 20 Jan 2022 20:06:15 -0500 X-IronPort-AV: E=Sophos;i="5.88,303,1635174000"; d="scan'208";a="107750920" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 21 Jan 2022 10:06:13 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 19404417762A; Fri, 21 Jan 2022 10:06:08 +0900 (JST) From: Lad Prabhakar To: =?utf-8?q?Niklas_S=C3=B6derlund?= , Jacopo Mondi , Philipp Zabel , Mauro Carvalho Chehab , Rob Herring , Laurent Pinchart , Sakari Ailus , Hans Verkuil Cc: Geert Uytterhoeven , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [RFC PATCH v2 3/4] media: platform: Add CRU driver for RZ/G2L SoC Date: Fri, 21 Jan 2022 01:05:42 +0000 Message-Id: <20220121010543.31385-4-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220121010543.31385-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20220121010543.31385-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add v4l driver for Renesas RZ/G2L Camera data Receiving Unit. Based on a patch in the BSP by Hien Huynh Signed-off-by: Lad Prabhakar --- v1->v2 * Dropped group * Dropped CSI subdev and implemented as new driver * Dropped "mc_" from function names * Moved the driver to renesas folder --- drivers/media/platform/Kconfig | 1 + drivers/media/platform/Makefile | 2 + .../media/platform/renesas/rzg2l-cru/Kconfig | 15 + .../media/platform/renesas/rzg2l-cru/Makefile | 4 + .../platform/renesas/rzg2l-cru/rzg2l-core.c | 432 +++++++++++ .../platform/renesas/rzg2l-cru/rzg2l-cru.h | 155 ++++ .../platform/renesas/rzg2l-cru/rzg2l-dma.c | 722 ++++++++++++++++++ .../platform/renesas/rzg2l-cru/rzg2l-v4l2.c | 360 +++++++++ 8 files changed, 1691 insertions(+) create mode 100644 drivers/media/platform/renesas/rzg2l-cru/Kconfig create mode 100644 drivers/media/platform/renesas/rzg2l-cru/Makefile create mode 100644 drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c create mode 100644 drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h create mode 100644 drivers/media/platform/renesas/rzg2l-cru/rzg2l-dma.c create mode 100644 drivers/media/platform/renesas/rzg2l-cru/rzg2l-v4l2.c diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig index cf4adc64c953..4251c5686c2a 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -169,6 +169,7 @@ source "drivers/media/platform/exynos4-is/Kconfig" source "drivers/media/platform/am437x/Kconfig" source "drivers/media/platform/xilinx/Kconfig" source "drivers/media/platform/rcar-vin/Kconfig" +source "drivers/media/platform/renesas/rzg2l-cru/Kconfig" source "drivers/media/platform/atmel/Kconfig" source "drivers/media/platform/sunxi/Kconfig" diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile index a148553babfc..021d30a2c66c 100644 --- a/drivers/media/platform/Makefile +++ b/drivers/media/platform/Makefile @@ -66,6 +66,8 @@ obj-$(CONFIG_VIDEO_XILINX) += xilinx/ obj-$(CONFIG_VIDEO_RCAR_ISP) += rcar-isp.o obj-$(CONFIG_VIDEO_RCAR_VIN) += rcar-vin/ +obj-$(CONFIG_VIDEO_RZG2L_CRU) += renesas/rzg2l-cru/ + obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel/ obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel/ obj-$(CONFIG_VIDEO_ATMEL_XISC) += atmel/ diff --git a/drivers/media/platform/renesas/rzg2l-cru/Kconfig b/drivers/media/platform/renesas/rzg2l-cru/Kconfig new file mode 100644 index 000000000000..310baa4d4c14 --- /dev/null +++ b/drivers/media/platform/renesas/rzg2l-cru/Kconfig @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0 + +config VIDEO_RZG2L_CRU + tristate "RZ/G2L Camera Receiving Unit (CRU) Driver" + depends on VIDEO_V4L2 && OF + depends on ARCH_RENESAS || COMPILE_TEST + select MEDIA_CONTROLLER + select VIDEO_V4L2_SUBDEV_API + select VIDEOBUF2_DMA_CONTIG + select V4L2_FWNODE + help + Support for Renesas RZ/G2L Camera Receiving Unit (CRU) driver. + + To compile this driver as a module, choose M here: the + module will be called rzg2l-cru. diff --git a/drivers/media/platform/renesas/rzg2l-cru/Makefile b/drivers/media/platform/renesas/rzg2l-cru/Makefile new file mode 100644 index 000000000000..8c307075f131 --- /dev/null +++ b/drivers/media/platform/renesas/rzg2l-cru/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 +rzg2l-cru-objs = rzg2l-core.o rzg2l-dma.o rzg2l-v4l2.o + +obj-$(CONFIG_VIDEO_RZG2L_CRU) += rzg2l-cru.o diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c new file mode 100644 index 000000000000..881bedaaff8f --- /dev/null +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c @@ -0,0 +1,432 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for Renesas RZ/G2L CRU + * + * Copyright (C) 2022 Renesas Electronics Corp. + * + * Based on Renesas R-Car VIN + * Copyright (C) 2011-2013 Renesas Solutions Corp. + * Copyright (C) 2013 Cogent Embedded, Inc., + * Copyright (C) 2008 Magnus Damm + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "rzg2l-cru.h" + +#define v4l2_dev_to_cru(d) container_of(d, struct rzg2l_cru_dev, v4l2_dev) + +static int rzg2l_cru_csi2_link_notify(struct media_link *link, u32 flags, + unsigned int notification) +{ + struct media_entity *entity; + struct rzg2l_cru_dev *cru; + struct video_device *vdev; + struct media_pad *csi_pad; + struct v4l2_subdev *sd; + int ret; + + ret = v4l2_pipeline_link_notify(link, flags, notification); + if (ret) + return ret; + + /* Only care about link enablement for CRU nodes. */ + if (!(flags & MEDIA_LNK_FL_ENABLED) || + !is_media_entity_v4l2_video_device(link->sink->entity)) + return 0; + + cru = container_of(link->graph_obj.mdev, struct rzg2l_cru_dev, mdev); + /* + * Don't allow link changes if any entity in the graph is + * streaming, modifying the CHSEL register fields can disrupt + * running streams. + */ + media_device_for_each_entity(entity, &cru->mdev) + if (entity->pads->stream_count) + return -EBUSY; + + mutex_lock(&cru->mdev_lock); + vdev = media_entity_to_video_device(link->sink->entity); + + csi_pad = media_entity_remote_pad(&cru->vdev.entity.pads[0]); + if (csi_pad) { + ret = -EMLINK; + goto out; + } + + sd = media_entity_to_v4l2_subdev(link->source->entity); + if (cru->csi.subdev == sd) { + cru->csi.channel = link->source->index - 1; + cru->is_csi = true; + } else { + ret = -ENODEV; + } + +out: + mutex_unlock(&cru->mdev_lock); + + return ret; +} + +static const struct media_device_ops rzg2l_cru_media_ops = { + .link_notify = rzg2l_cru_csi2_link_notify, +}; + +static void rzg2l_cru_put(struct rzg2l_cru_dev *cru) +{ + mutex_lock(&cru->mdev_lock); + cru->v4l2_dev.mdev = NULL; + mutex_unlock(&cru->mdev_lock); +} + +/* ----------------------------------------------------------------------------- + * Group async notifier + */ + +static int rzg2l_cru_group_notify_complete(struct v4l2_async_notifier *notifier) +{ + struct rzg2l_cru_dev *cru = v4l2_dev_to_cru(notifier->v4l2_dev); + unsigned int i; + int ret; + + ret = media_device_register(&cru->mdev); + if (ret) + return ret; + + ret = v4l2_device_register_subdev_nodes(&cru->v4l2_dev); + if (ret) { + dev_err(cru->dev, "Failed to register subdev nodes\n"); + return ret; + } + + if (!video_is_registered(&cru->vdev)) { + ret = rzg2l_cru_v4l2_register(cru); + if (ret) + return ret; + } + + /* Create all media device links between CRU and CSI-2's. */ + for (i = 1; i <= CSI2_VCHANNEL; i++) { + struct media_entity *source, *sink; + + source = &cru->csi.subdev->entity; + sink = &cru->vdev.entity; + + ret = media_create_pad_link(source, i, sink, 0, 0); + if (ret) { + dev_err(cru->dev, "Error adding link from %s to %s\n", + source->name, sink->name); + break; + } + } + + return ret; +} + +static void rzg2l_cru_group_notify_unbind(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct rzg2l_cru_dev *cru = v4l2_dev_to_cru(notifier->v4l2_dev); + + rzg2l_cru_v4l2_unregister(cru); + + mutex_lock(&cru->mdev_lock); + + if (cru->csi.asd == asd) { + cru->csi.subdev = NULL; + dev_dbg(cru->dev, "Unbind CSI-2 %s\n", subdev->name); + } + + mutex_unlock(&cru->mdev_lock); + + media_device_unregister(&cru->mdev); +} + +static int rzg2l_cru_group_notify_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct rzg2l_cru_dev *cru = v4l2_dev_to_cru(notifier->v4l2_dev); + unsigned int i; + + mutex_lock(&cru->mdev_lock); + + if (cru->csi.asd == asd) { + cru->csi.subdev = subdev; + dev_dbg(cru->dev, "Bound CSI-2 %s to slot %u\n", subdev->name, i); + } + + mutex_unlock(&cru->mdev_lock); + + return 0; +} + +static const struct v4l2_async_notifier_operations rzg2l_cru_async_ops = { + .bound = rzg2l_cru_group_notify_bound, + .unbind = rzg2l_cru_group_notify_unbind, + .complete = rzg2l_cru_group_notify_complete, +}; + +static int rvin_mc_parse_of(struct rzg2l_cru_dev *cru, unsigned int id) +{ + struct v4l2_fwnode_endpoint vep = { + .bus_type = V4L2_MBUS_CSI2_DPHY, + }; + struct fwnode_handle *ep, *fwnode; + struct v4l2_async_subdev *asd; + int ret; + + ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(cru->dev), 1, id, 0); + if (!ep) + return 0; + + fwnode = fwnode_graph_get_remote_endpoint(ep); + ret = v4l2_fwnode_endpoint_parse(ep, &vep); + fwnode_handle_put(ep); + if (ret) { + dev_err(cru->dev, "Failed to parse %pOF\n", to_of_node(fwnode)); + ret = -EINVAL; + goto out; + } + + if (!of_device_is_available(to_of_node(fwnode))) { + dev_dbg(cru->dev, "OF device %pOF disabled, ignoring\n", + to_of_node(fwnode)); + ret = -ENOTCONN; + goto out; + } + + asd = v4l2_async_nf_add_fwnode(&cru->notifier, fwnode, + struct v4l2_async_subdev); + if (IS_ERR(asd)) { + ret = PTR_ERR(asd); + goto out; + } + + cru->csi.asd = asd; + + dev_dbg(cru->dev, "Added OF device %pOF to slot %u\n", + to_of_node(fwnode), vep.base.id); +out: + fwnode_handle_put(fwnode); + + return ret; +} + +static int rzg2l_cru_mc_parse_of_graph(struct rzg2l_cru_dev *cru) +{ + int ret; + + v4l2_async_nf_init(&cru->notifier); + + ret = rvin_mc_parse_of(cru, 0); + if (ret) + return ret; + + cru->notifier.ops = &rzg2l_cru_async_ops; + + if (list_empty(&cru->notifier.asd_list)) + return 0; + + ret = v4l2_async_nf_register(&cru->v4l2_dev, &cru->notifier); + if (ret < 0) { + dev_err(cru->dev, "Notifier registration failed\n"); + v4l2_async_nf_cleanup(&cru->notifier); + return ret; + } + + return 0; +} + +static int rzg2l_cru_csi2_init(struct rzg2l_cru_dev *cru) +{ + struct media_device *mdev = NULL; + const struct of_device_id *match; + int ret; + + cru->pad.flags = MEDIA_PAD_FL_SINK; + ret = media_entity_pads_init(&cru->vdev.entity, 1, &cru->pad); + if (ret) + return ret; + + mutex_init(&cru->mdev_lock); + mdev = &cru->mdev; + mdev->dev = cru->dev; + mdev->ops = &rzg2l_cru_media_ops; + + match = of_match_node(cru->dev->driver->of_match_table, + cru->dev->of_node); + + strscpy(mdev->driver_name, KBUILD_MODNAME, sizeof(mdev->driver_name)); + strscpy(mdev->model, match->compatible, sizeof(mdev->model)); + snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s", + dev_name(mdev->dev)); + + cru->v4l2_dev.mdev = &cru->mdev; + + media_device_init(mdev); + + ret = rzg2l_cru_mc_parse_of_graph(cru); + if (ret) + rzg2l_cru_put(cru); + + return 0; +} + +static int rzg2l_cru_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct rzg2l_cru_dev *cru = container_of(ctrl->handler, + struct rzg2l_cru_dev, + ctrl_handler); + int ret = 0; + + switch (ctrl->id) { + case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: + if (cru->state == RZG2L_CRU_DMA_STOPPED || + cru->state == RZG2L_CRU_DMA_STOPPING) + cru->num_buf = ctrl->val; + else + ret = -EBUSY; + + break; + } + + return ret; +} + +static const struct v4l2_ctrl_ops rzg2l_cru_ctrl_ops = { + .s_ctrl = rzg2l_cru_s_ctrl, +}; + +static int rzg2l_cru_probe(struct platform_device *pdev) +{ + struct rzg2l_cru_dev *cru; + struct v4l2_ctrl *ctrl; + int irq, ret; + + cru = devm_kzalloc(&pdev->dev, sizeof(*cru), GFP_KERNEL); + if (!cru) + return -ENOMEM; + + cru->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(cru->base)) + return PTR_ERR(cru->base); + + cru->presetn = devm_reset_control_get(&pdev->dev, "presetn"); + if (IS_ERR(cru->presetn)) + return dev_err_probe(&pdev->dev, PTR_ERR(cru->presetn), + "failed to get cpg presetn\n"); + + cru->aresetn = devm_reset_control_get(&pdev->dev, "aresetn"); + if (IS_ERR(cru->aresetn)) + return dev_err_probe(&pdev->dev, PTR_ERR(cru->aresetn), + "failed to get cpg aresetn\n"); + + cru->dev = &pdev->dev; + cru->info = of_device_get_match_data(&pdev->dev); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = rzg2l_cru_dma_register(cru, irq); + if (ret) + return ret; + + platform_set_drvdata(pdev, cru); + + ret = rzg2l_cru_csi2_init(cru); + if (ret) + goto error_dma_unregister; + + v4l2_ctrl_handler_init(&cru->ctrl_handler, 1); + ctrl = v4l2_ctrl_new_std(&cru->ctrl_handler, &rzg2l_cru_ctrl_ops, + V4L2_CID_MIN_BUFFERS_FOR_CAPTURE, + 1, HW_BUFFER_MAX, 1, HW_BUFFER_DEFAULT); + if (cru->ctrl_handler.error) { + dev_err(&pdev->dev, "%s: control initialization error %d\n", + __func__, cru->ctrl_handler.error); + ret = cru->ctrl_handler.error; + goto free_ctrl; + } + + ctrl->flags &= ~V4L2_CTRL_FLAG_READ_ONLY; + cru->v4l2_dev.ctrl_handler = &cru->ctrl_handler; + + cru->num_buf = HW_BUFFER_DEFAULT; + + pm_suspend_ignore_children(&pdev->dev, true); + pm_runtime_enable(&pdev->dev); + + return 0; + +free_ctrl: + v4l2_ctrl_handler_free(&cru->ctrl_handler); +error_dma_unregister: + rzg2l_cru_dma_unregister(cru); + + return ret; +} + +static const struct rzg2l_cru_info rzg2l_cru_info_generic = { + .max_width = 2800, + .max_height = 4096, +}; + +static const struct of_device_id rzg2l_cru_of_id_table[] = { + { + .compatible = "renesas,rzg2l-cru", + .data = &rzg2l_cru_info_generic, + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, rzg2l_cru_of_id_table); + +static int rzg2l_cru_remove(struct platform_device *pdev) +{ + struct rzg2l_cru_dev *cru = platform_get_drvdata(pdev); + + pm_runtime_disable(&pdev->dev); + + rzg2l_cru_v4l2_unregister(cru); + + v4l2_async_nf_unregister(&cru->notifier); + v4l2_async_nf_cleanup(&cru->notifier); + + media_device_cleanup(&cru->mdev); + mutex_destroy(&cru->mdev_lock); + cru->v4l2_dev.mdev = NULL; + + v4l2_ctrl_handler_free(&cru->ctrl_handler); + cru->vdev.ctrl_handler = NULL; + + rzg2l_cru_dma_unregister(cru); + + return 0; +} + +static struct platform_driver rzg2l_cru_driver = { + .driver = { + .name = "rzg2l-cru", + .of_match_table = rzg2l_cru_of_id_table, + }, + .probe = rzg2l_cru_probe, + .remove = rzg2l_cru_remove, +}; + +module_platform_driver(rzg2l_cru_driver); + +MODULE_DESCRIPTION("Renesas RZ/G2L CRU driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h new file mode 100644 index 000000000000..91a28279846e --- /dev/null +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h @@ -0,0 +1,155 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Driver for Renesas RZ/G2L CRU + * + * Copyright (C) 2022 Renesas Electronics Corp. + * + */ + +#ifndef __RZG2L_CRU__ +#define __RZG2L_CRU__ + +#include +#include + +#include +#include +#include +#include +#include + +/* Number of HW buffers */ +#define HW_BUFFER_MAX 8 +#define HW_BUFFER_DEFAULT 3 + +/* Address alignment mask for HW buffers */ +#define HW_BUFFER_MASK 0x1ff + +/* Maximum number of CSI2 virtual channels */ +#define CSI2_VCHANNEL 4 + +/** + * enum rzg2l_cru_dma_state - DMA states + * @RZG2L_CRU_DMA_STOPPED: No operation in progress + * @RZG2L_CRU_DMA_STARTING: Capture starting up + * @RZG2L_CRU_DMA_RUNNING: Operation in progress have buffers + * @RZG2L_CRU_DMA_STOPPING: Stopping operation + */ +enum rzg2l_cru_dma_state { + RZG2L_CRU_DMA_STOPPED = 0, + RZG2L_CRU_DMA_STARTING, + RZG2L_CRU_DMA_RUNNING, + RZG2L_CRU_DMA_STOPPING, +}; + +/** + * struct rzg2l_cru_info - Information about the particular CRU implementation + * @max_width: max input width the CRU supports + * @max_height: max input height the CRU supports + */ +struct rzg2l_cru_info { + unsigned int max_width; + unsigned int max_height; +}; + +struct rzg2l_cru_csi { + struct v4l2_async_subdev *asd; + struct v4l2_subdev *subdev; + u32 channel; +}; + +/** + * struct rzg2l_cru_dev - Renesas CRU device structure + * @dev: (OF) device + * @base: device I/O register space remapped to virtual memory + * @info: info about CRU instance + * + * @presetn: CRU_PRESETN reset line + * @aresetn: CRU_ARESETN reset line + * + * @vdev: V4L2 video device associated with CRU + * @v4l2_dev: V4L2 device + * @ctrl_handler: V4L2 control handler + * @num_buf: Holds the current number of buffers enabled + * @notifier: V4L2 asynchronous subdevs notifier + * + * @csi: CSI info + * @mdev: media device + * @mdev_lock: protects the count, notifier and csi members + * @pad: media pad for the video device entity + * + * @lock: protects @queue + * @queue: vb2 buffers queue + * @scratch: cpu address for scratch buffer + * @scratch_phys: physical address of the scratch buffer + * + * @qlock: protects @queue_buf, @buf_list, @sequence + * @state + * @queue_buf: Keeps track of buffers given to HW slot + * @buf_list: list of queued buffers + * @sequence: V4L2 buffers sequence number + * @state: keeps track of operation state + * + * @is_csi: flag to mark the CRU as using a CSI-2 subdevice + * + * @input_is_yuv: flag to mark the input format of CRU + * @output_is_yuv: flag to mark the output format of CRU + * + * @mbus_code: media bus format code + * @format: active V4L2 pixel format + * + * @compose: active composing + * @source: active size of the video source + * @std: active video standard of the video source + */ +struct rzg2l_cru_dev { + struct device *dev; + void __iomem *base; + const struct rzg2l_cru_info *info; + + struct reset_control *presetn; + struct reset_control *aresetn; + + struct video_device vdev; + struct v4l2_device v4l2_dev; + struct v4l2_ctrl_handler ctrl_handler; + u8 num_buf; + + struct v4l2_async_notifier notifier; + + struct rzg2l_cru_csi csi; + struct media_device mdev; + struct mutex mdev_lock; + struct media_pad pad; + + struct mutex lock; + struct vb2_queue queue; + void *scratch; + dma_addr_t scratch_phys; + + spinlock_t qlock; + struct vb2_v4l2_buffer *queue_buf[HW_BUFFER_MAX]; + struct list_head buf_list; + unsigned int sequence; + enum rzg2l_cru_dma_state state; + + bool is_csi; + + bool input_is_yuv; + bool output_is_yuv; + + u32 mbus_code; + struct v4l2_pix_format format; + + struct v4l2_rect compose; +}; + +int rzg2l_cru_dma_register(struct rzg2l_cru_dev *cru, int irq); +void rzg2l_cru_dma_unregister(struct rzg2l_cru_dev *cru); + +int rzg2l_cru_v4l2_register(struct rzg2l_cru_dev *cru); +void rzg2l_cru_v4l2_unregister(struct rzg2l_cru_dev *cru); + +const struct v4l2_format_info *rzg2l_cru_format_from_pixel(u32 format); + +#endif diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-dma.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-dma.c new file mode 100644 index 000000000000..0fcf4baccca9 --- /dev/null +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-dma.c @@ -0,0 +1,722 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for Renesas RZ/G2L CRU + * + * Copyright (C) 2022 Renesas Electronics Corp. + * + * Based on Renesas R-Car VIN + * Copyright (C) 2011-2013 Renesas Solutions Corp. + * Copyright (C) 2013 Cogent Embedded, Inc., + * Copyright (C) 2008 Magnus Damm + */ + +#include +#include +#include +#include + +#include + +#include "rzg2l-cru.h" + +/* HW CRU Registers Definition */ +/* CRU Control Register */ +#define CRUnCTRL 0x0 +#define CRUnCTRL_VINSEL(x) ((x) << 0) + +/* CRU Interrupt Enable Register */ +#define CRUnIE 0x4 +#define CRUnIE_SFE BIT(16) +#define CRUnIE_EFE BIT(17) + +/* CRU Interrupt Status Register */ +#define CRUnINTS 0x8 +#define CRUnINTS_SFS BIT(16) + +/* CRU Reset Register */ +#define CRUnRST 0xc +#define CRUnRST_VRESETN BIT(0) + +/* Memory Bank Base Address (Lower) Register for CRU Image Data */ +#define AMnMBxADDRL(x) (0x100 + ((x) * 8)) + +/* Memory Bank Base Address (Higher) Register for CRU Image Data */ +#define AMnMBxADDRH(x) (0x104 + ((x) * 8)) + +/* Memory Bank Enable Register for CRU Image Data */ +#define AMnMBVALID 0x148 +#define AMnMBVALID_MBVALID(x) GENMASK(x, 0) + +/* Memory Bank Status Register for CRU Image Data */ +#define AMnMBS 0x14c +#define AMnMBS_MBSTS 0x7 + +/* AXI Master FIFO Pointer Register for CRU Image Data */ +#define AMnFIFOPNTR 0x168 +#define AMnFIFOPNTR_FIFOWPNTR GENMASK(7, 0) +#define AMnFIFOPNTR_FIFORPNTR_Y GENMASK(23, 16) + +/* AXI Master Transfer Stop Register for CRU Image Data */ +#define AMnAXISTP 0x174 +#define AMnAXISTP_AXI_STOP BIT(0) + +/* AXI Master Transfer Stop Status Register for CRU Image Data */ +#define AMnAXISTPACK 0x178 +#define AMnAXISTPACK_AXI_STOP_ACK BIT(0) + +/* CRU Image Processing Enable Register */ +#define ICnEN 0x200 +#define ICnEN_ICEN BIT(0) + +/* CRU Image Processing Main Control Register */ +#define ICnMC 0x208 +#define ICnMC_CSCTHR BIT(5) +#define ICnMC_INF_YUV8_422 (0x1e << 16) +#define ICnMC_INF_USER (0x30 << 16) +#define ICnMC_VCSEL(x) ((x) << 22) +#define ICnMC_INF_MASK GENMASK(21, 16) + +/* CRU Module Status Register */ +#define ICnMS 0x254 +#define ICnMS_IA BIT(2) + +/* CRU Data Output Mode Register */ +#define ICnDMR 0x26c +#define ICnDMR_YCMODE_UYVY (1 << 4) + +#define RZG2L_TIMEOUT_MS 100 +#define RZG2L_RETRIES 10 + +struct rzg2l_cru_buffer { + struct vb2_v4l2_buffer vb; + struct list_head list; +}; + +#define to_buf_list(vb2_buffer) (&container_of(vb2_buffer, \ + struct rzg2l_cru_buffer, \ + vb)->list) + +static void rzg2l_cru_write(struct rzg2l_cru_dev *cru, u32 offset, u32 value) +{ + iowrite32(value, cru->base + offset); +} + +static u32 rzg2l_cru_read(struct rzg2l_cru_dev *cru, u32 offset) +{ + return ioread32(cru->base + offset); +} + +/* Need to hold qlock before calling */ +static void return_unused_buffers(struct rzg2l_cru_dev *cru, + enum vb2_buffer_state state) +{ + struct rzg2l_cru_buffer *buf, *node; + unsigned long flags; + unsigned int i; + + spin_lock_irqsave(&cru->qlock, flags); + for (i = 0; i < cru->num_buf; i++) { + if (cru->queue_buf[i]) { + vb2_buffer_done(&cru->queue_buf[i]->vb2_buf, + state); + cru->queue_buf[i] = NULL; + } + } + + list_for_each_entry_safe(buf, node, &cru->buf_list, list) { + vb2_buffer_done(&buf->vb.vb2_buf, state); + list_del(&buf->list); + } + spin_unlock_irqrestore(&cru->qlock, flags); +} + +static int rzg2l_cru_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, + unsigned int *nplanes, unsigned int sizes[], + struct device *alloc_devs[]) +{ + struct rzg2l_cru_dev *cru = vb2_get_drv_priv(vq); + + /* Make sure the image size is large enough. */ + if (*nplanes) + return sizes[0] < cru->format.sizeimage ? -EINVAL : 0; + + *nplanes = 1; + sizes[0] = cru->format.sizeimage; + + return 0; +}; + +static int rzg2l_cru_buffer_prepare(struct vb2_buffer *vb) +{ + struct rzg2l_cru_dev *cru = vb2_get_drv_priv(vb->vb2_queue); + unsigned long size = cru->format.sizeimage; + + if (vb2_plane_size(vb, 0) < size) { + dev_err(cru->dev, "buffer too small (%lu < %lu)\n", + vb2_plane_size(vb, 0), size); + return -EINVAL; + } + + vb2_set_plane_payload(vb, 0, size); + + return 0; +} + +static void rzg2l_cru_buffer_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct rzg2l_cru_dev *cru = vb2_get_drv_priv(vb->vb2_queue); + unsigned long flags; + + spin_lock_irqsave(&cru->qlock, flags); + + list_add_tail(to_buf_list(vbuf), &cru->buf_list); + + spin_unlock_irqrestore(&cru->qlock, flags); +} + +static int rzg2l_cru_mc_validate_format(struct rzg2l_cru_dev *cru, + struct v4l2_subdev *sd, + struct media_pad *pad) +{ + struct v4l2_subdev_format fmt = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + + fmt.pad = pad->index; + fmt.stream = 0; + if (v4l2_subdev_call(sd, pad, get_fmt, v4l2_subdev_get_active_state(sd), &fmt)) + return -EPIPE; + + if (cru->is_csi) { + switch (fmt.format.code) { + case MEDIA_BUS_FMT_UYVY8_2X8: + break; + default: + return -EPIPE; + } + } + cru->mbus_code = fmt.format.code; + + switch (fmt.format.field) { + case V4L2_FIELD_TOP: + case V4L2_FIELD_BOTTOM: + case V4L2_FIELD_NONE: + case V4L2_FIELD_INTERLACED_TB: + case V4L2_FIELD_INTERLACED_BT: + case V4L2_FIELD_INTERLACED: + case V4L2_FIELD_SEQ_TB: + case V4L2_FIELD_SEQ_BT: + break; + default: + return -EPIPE; + } + + if (fmt.format.width != cru->format.width || + fmt.format.height != cru->format.height || + fmt.format.code != cru->mbus_code) + return -EPIPE; + + return 0; +} + +static void rzg2l_cru_set_slot_addr(struct rzg2l_cru_dev *cru, + int slot, dma_addr_t addr) +{ + const struct v4l2_format_info *fmt; + int offsetx, offsety; + dma_addr_t offset; + + fmt = rzg2l_cru_format_from_pixel(cru->format.pixelformat); + + /* + * There is no HW support for composition do the best we can + * by modifying the buffer offset + */ + offsetx = cru->compose.left * fmt->bpp[0]; + offsety = cru->compose.top * cru->format.bytesperline; + offset = addr + offsetx + offsety; + + /* + * The address needs to be 512 bytes aligned. Driver should never accept + * settings that do not satisfy this in the first place... + */ + if (WARN_ON((offsetx | offsety | offset) & HW_BUFFER_MASK)) + return; + + /* Currently, we just use the buffer in 32 bits address */ + rzg2l_cru_write(cru, AMnMBxADDRL(slot), offset); + rzg2l_cru_write(cru, AMnMBxADDRH(slot), 0); +} + +/* + * Moves a buffer from the queue to the HW slot. If no buffer is + * available use the scratch buffer. The scratch buffer is never + * returned to userspace, its only function is to enable the capture + * loop to keep running. + */ +static void rzg2l_cru_fill_hw_slot(struct rzg2l_cru_dev *cru, int slot) +{ + struct vb2_v4l2_buffer *vbuf; + struct rzg2l_cru_buffer *buf; + dma_addr_t phys_addr; + + /* A already populated slot shall never be overwritten. */ + if (WARN_ON(cru->queue_buf[slot])) + return; + + dev_dbg(cru->dev, "Filling HW slot: %d\n", slot); + + if (list_empty(&cru->buf_list)) { + cru->queue_buf[slot] = NULL; + phys_addr = cru->scratch_phys; + } else { + /* Keep track of buffer we give to HW */ + buf = list_entry(cru->buf_list.next, + struct rzg2l_cru_buffer, list); + vbuf = &buf->vb; + list_del_init(to_buf_list(vbuf)); + cru->queue_buf[slot] = vbuf; + + /* Setup DMA */ + phys_addr = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0); + } + + rzg2l_cru_set_slot_addr(cru, slot, phys_addr); +} + +static void rzg2l_cru_initialize_axi(struct rzg2l_cru_dev *cru) +{ + unsigned int slot; + + /* + * Set image data memory banks. + * Currently, we will use maximum address. + */ + rzg2l_cru_write(cru, AMnMBVALID, AMnMBVALID_MBVALID(cru->num_buf - 1)); + + for (slot = 0; slot < cru->num_buf; slot++) + rzg2l_cru_fill_hw_slot(cru, slot); +} + +static void rzg2l_cru_csi2_setup(struct rzg2l_cru_dev *cru) +{ + u32 icnmc; + + switch (cru->mbus_code) { + case MEDIA_BUS_FMT_UYVY8_2X8: + icnmc = ICnMC_INF_YUV8_422; + cru->input_is_yuv = true; + break; + default: + cru->input_is_yuv = false; + icnmc = ICnMC_INF_USER; + break; + } + + icnmc |= (rzg2l_cru_read(cru, ICnMC) & ~ICnMC_INF_MASK); + + /* Set virtual channel CSI2 */ + icnmc |= ICnMC_VCSEL(cru->csi.channel); + + rzg2l_cru_write(cru, ICnMC, icnmc); +} + +static int rzg2l_cru_initialize_image_conv(struct rzg2l_cru_dev *cru) +{ + u32 icndmr; + + if (cru->is_csi) + rzg2l_cru_csi2_setup(cru); + + /* Output format */ + switch (cru->format.pixelformat) { + case V4L2_PIX_FMT_UYVY: + icndmr = ICnDMR_YCMODE_UYVY; + cru->output_is_yuv = true; + break; + default: + dev_err(cru->dev, "Invalid pixelformat (0x%x)\n", + cru->format.pixelformat); + return -EINVAL; + } + + /* If input and output use same colorspace, do bypass mode */ + if (cru->output_is_yuv == cru->input_is_yuv) + rzg2l_cru_write(cru, ICnMC, + rzg2l_cru_read(cru, ICnMC) | ICnMC_CSCTHR); + else + rzg2l_cru_write(cru, ICnMC, + rzg2l_cru_read(cru, ICnMC) & (~ICnMC_CSCTHR)); + + /* Set output data format */ + rzg2l_cru_write(cru, ICnDMR, icndmr); + + return 0; +} + +static int rzg2l_cru_set_stream(struct rzg2l_cru_dev *cru, int on) +{ + struct media_pipeline *pipe; + struct v4l2_subdev *sd; + struct media_pad *pad; + unsigned long flags; + int ret; + + pad = media_entity_remote_pad(&cru->pad); + if (!pad) + return -EPIPE; + + sd = media_entity_to_v4l2_subdev(pad->entity); + + if (!on) { + media_pipeline_stop(cru->vdev.entity.pads); + return v4l2_subdev_call(sd, video, s_stream, 0); + } + + ret = rzg2l_cru_mc_validate_format(cru, sd, pad); + if (ret) + return ret; + + spin_lock_irqsave(&cru->qlock, flags); + + /* Select a video input */ + if (cru->is_csi) + rzg2l_cru_write(cru, CRUnCTRL, CRUnCTRL_VINSEL(0)); + + /* Cancel the software reset for image processing block */ + rzg2l_cru_write(cru, CRUnRST, CRUnRST_VRESETN); + + /* Disable and clear the interrupt before using */ + rzg2l_cru_write(cru, CRUnIE, 0); + rzg2l_cru_write(cru, CRUnINTS, 0x001f000f); + + /* Initialize the AXI master */ + rzg2l_cru_initialize_axi(cru); + + /* Initialize image convert */ + ret = rzg2l_cru_initialize_image_conv(cru); + if (ret) { + spin_unlock_irqrestore(&cru->qlock, flags); + return ret; + } + + /* Enable interrupt */ + rzg2l_cru_write(cru, CRUnIE, CRUnIE_EFE); + + /* Enable image processing reception */ + rzg2l_cru_write(cru, ICnEN, ICnEN_ICEN); + + spin_unlock_irqrestore(&cru->qlock, flags); + + pipe = sd->entity.pads->pipe ? sd->entity.pads->pipe : &cru->vdev.pipe; + ret = media_pipeline_start(cru->vdev.entity.pads, pipe); + if (ret) + return ret; + + ret = v4l2_subdev_call(sd, video, s_stream, 1); + if (ret == -ENOIOCTLCMD) + ret = 0; + if (ret) + media_pipeline_stop(cru->vdev.entity.pads); + + return ret; +} + +static void rzg2l_cru_stop_streaming(struct rzg2l_cru_dev *cru) +{ + u32 amnfifopntr, amnfifopntr_w, amnfifopntr_r_y; + unsigned int retries = 0; + unsigned long flags; + u32 icnms; + + cru->state = RZG2L_CRU_DMA_STOPPING; + + rzg2l_cru_set_stream(cru, 0); + + spin_lock_irqsave(&cru->qlock, flags); + + /* Enable IRQ to detect frame start reception */ + rzg2l_cru_write(cru, CRUnINTS, + (~rzg2l_cru_read(cru, CRUnINTS)) | CRUnINTS_SFS); + rzg2l_cru_write(cru, CRUnIE, CRUnIE_SFE); + + /* Wait for streaming to stop */ + while (retries++ < RZG2L_RETRIES) { + spin_unlock_irqrestore(&cru->qlock, flags); + msleep(RZG2L_TIMEOUT_MS); + spin_lock_irqsave(&cru->qlock, flags); + } + + icnms = rzg2l_cru_read(cru, ICnMS) & ICnMS_IA; + if (icnms) + dev_err(cru->dev, "Failed stop HW, something is seriously broken\n"); + + cru->state = RZG2L_CRU_DMA_STOPPED; + + /* Stop the operation of image conversion */ + rzg2l_cru_write(cru, ICnEN, 0); + + /* Disable and clear the interrupt */ + rzg2l_cru_write(cru, CRUnIE, 0); + rzg2l_cru_write(cru, CRUnINTS, 0x001F0F0F); + + /* Wait until the FIFO becomes empty */ + for (retries = 5; retries > 0; retries--) { + amnfifopntr = rzg2l_cru_read(cru, AMnFIFOPNTR); + + amnfifopntr_w = amnfifopntr & AMnFIFOPNTR_FIFOWPNTR; + amnfifopntr_r_y = + (amnfifopntr & AMnFIFOPNTR_FIFORPNTR_Y) >> 16; + if (amnfifopntr_w == amnfifopntr_r_y) + break; + + usleep_range(10, 20); + } + + /* Notify that FIFO is not empty here */ + if (!retries) + dev_err(cru->dev, "Failed to empty FIFO\n"); + + /* Stop AXI bus */ + rzg2l_cru_write(cru, AMnAXISTP, AMnAXISTP_AXI_STOP); + + /* Wait until the AXI bus stop */ + for (retries = 5; retries > 0; retries--) { + if (rzg2l_cru_read(cru, AMnAXISTPACK) & + AMnAXISTPACK_AXI_STOP_ACK) + break; + + usleep_range(10, 20); + }; + + /* Notify that AXI bus can not stop here */ + if (!retries) + dev_err(cru->dev, "Failed to stop AXI bus\n"); + + /* Cancel the AXI bus stop request */ + rzg2l_cru_write(cru, AMnAXISTP, 0); + + /* Resets the image processing module */ + rzg2l_cru_write(cru, CRUnRST, 0); + + spin_unlock_irqrestore(&cru->qlock, flags); + + /* Set reset state */ + reset_control_assert(cru->aresetn); +} + +static int rzg2l_cru_start_streaming_vq(struct vb2_queue *vq, unsigned int count) +{ + struct rzg2l_cru_dev *cru = vb2_get_drv_priv(vq); + int ret; + + /* Release reset state */ + ret = reset_control_deassert(cru->aresetn); + if (ret) { + dev_err(cru->dev, "failed to deassert aresetn\n"); + return ret; + } + + /* Allocate scratch buffer. */ + cru->scratch = dma_alloc_coherent(cru->dev, cru->format.sizeimage, + &cru->scratch_phys, GFP_KERNEL); + if (!cru->scratch) { + return_unused_buffers(cru, VB2_BUF_STATE_QUEUED); + dev_err(cru->dev, "Failed to allocate scratch buffer\n"); + return -ENOMEM; + } + + cru->sequence = 0; + + ret = rzg2l_cru_set_stream(cru, 1); + if (ret) { + return_unused_buffers(cru, VB2_BUF_STATE_QUEUED); + goto out; + } + + cru->state = RZG2L_CRU_DMA_STARTING; + + dev_dbg(cru->dev, "Starting to capture\n"); + +out: + if (ret) + dma_free_coherent(cru->dev, cru->format.sizeimage, cru->scratch, + cru->scratch_phys); + + return ret; +} + +static void rzg2l_cru_stop_streaming_vq(struct vb2_queue *vq) +{ + struct rzg2l_cru_dev *cru = vb2_get_drv_priv(vq); + + rzg2l_cru_stop_streaming(cru); + + /* Free scratch buffer */ + dma_free_coherent(cru->dev, cru->format.sizeimage, cru->scratch, + cru->scratch_phys); + + return_unused_buffers(cru, VB2_BUF_STATE_ERROR); +} + +static const struct vb2_ops rzg2l_cru_qops = { + .queue_setup = rzg2l_cru_queue_setup, + .buf_prepare = rzg2l_cru_buffer_prepare, + .buf_queue = rzg2l_cru_buffer_queue, + .start_streaming = rzg2l_cru_start_streaming_vq, + .stop_streaming = rzg2l_cru_stop_streaming_vq, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +static irqreturn_t rzg2l_cru_irq(int irq, void *data) +{ + struct rzg2l_cru_dev *cru = data; + unsigned int handled = 0; + unsigned long flags; + u32 irq_status; + u32 amnmbs; + int slot; + + spin_lock_irqsave(&cru->qlock, flags); + + irq_status = rzg2l_cru_read(cru, CRUnINTS); + if (!irq_status) + goto done; + + handled = 1; + + rzg2l_cru_write(cru, CRUnINTS, rzg2l_cru_read(cru, CRUnINTS)); + + /* Nothing to do if capture status is 'RZG2L_CRU_DMA_STOPPED' */ + if (cru->state == RZG2L_CRU_DMA_STOPPED) { + dev_dbg(cru->dev, "IRQ while state stopped\n"); + goto done; + } + + /* Increase stop retries if capture status is 'RZG2L_CRU_DMA_STOPPING' */ + if (cru->state == RZG2L_CRU_DMA_STOPPING) { + if (irq_status & CRUnINTS_SFS) + dev_dbg(cru->dev, "IRQ while state stopping\n"); + goto done; + } + + /* Prepare for capture and update state */ + amnmbs = rzg2l_cru_read(cru, AMnMBS); + slot = amnmbs & AMnMBS_MBSTS; + + /* + * AMnMBS.MBSTS indicates the destination of Memory Bank (MB). + * Recalculate to get the current transfer complete MB. + */ + if (slot == 0) + slot = cru->num_buf - 1; + else + slot--; + + /* + * To hand buffers back in a known order to userspace start + * to capture first from slot 0. + */ + if (cru->state == RZG2L_CRU_DMA_STARTING) { + if (slot != 0) { + dev_dbg(cru->dev, "Starting sync slot: %d\n", slot); + goto done; + } + + dev_dbg(cru->dev, "Capture start synced!\n"); + cru->state = RZG2L_CRU_DMA_RUNNING; + } + + /* Capture frame */ + if (cru->queue_buf[slot]) { + cru->queue_buf[slot]->field = cru->format.field; + cru->queue_buf[slot]->sequence = cru->sequence; + cru->queue_buf[slot]->vb2_buf.timestamp = ktime_get_ns(); + vb2_buffer_done(&cru->queue_buf[slot]->vb2_buf, + VB2_BUF_STATE_DONE); + cru->queue_buf[slot] = NULL; + } else { + /* Scratch buffer was used, dropping frame. */ + dev_dbg(cru->dev, "Dropping frame %u\n", cru->sequence); + } + + cru->sequence++; + + /* Prepare for next frame */ + rzg2l_cru_fill_hw_slot(cru, slot); + +done: + spin_unlock_irqrestore(&cru->qlock, flags); + + return IRQ_RETVAL(handled); +} + +void rzg2l_cru_dma_unregister(struct rzg2l_cru_dev *cru) +{ + mutex_destroy(&cru->lock); + + v4l2_device_unregister(&cru->v4l2_dev); + reset_control_assert(cru->presetn); +} + +int rzg2l_cru_dma_register(struct rzg2l_cru_dev *cru, int irq) +{ + struct vb2_queue *q = &cru->queue; + unsigned int i; + int ret; + + ret = reset_control_deassert(cru->presetn); + if (ret) { + dev_err(cru->dev, "failed to deassert presetn\n"); + return ret; + } + + /* Initialize the top-level structure */ + ret = v4l2_device_register(cru->dev, &cru->v4l2_dev); + if (ret) + return ret; + + mutex_init(&cru->lock); + INIT_LIST_HEAD(&cru->buf_list); + + spin_lock_init(&cru->qlock); + + cru->state = RZG2L_CRU_DMA_STOPPED; + + for (i = 0; i < HW_BUFFER_MAX; i++) + cru->queue_buf[i] = NULL; + + /* buffer queue */ + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF; + q->lock = &cru->lock; + q->drv_priv = cru; + q->buf_struct_size = sizeof(struct rzg2l_cru_buffer); + q->ops = &rzg2l_cru_qops; + q->mem_ops = &vb2_dma_contig_memops; + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->min_buffers_needed = 4; + q->dev = cru->dev; + + ret = vb2_queue_init(q); + if (ret < 0) { + dev_err(cru->dev, "failed to initialize VB2 queue\n"); + goto error; + } + + /* IRQ */ + ret = devm_request_irq(cru->dev, irq, rzg2l_cru_irq, IRQF_SHARED, + KBUILD_MODNAME, cru); + if (ret) { + dev_err(cru->dev, "failed to request irq\n"); + goto error; + } + + return 0; + +error: + rzg2l_cru_dma_unregister(cru); + return ret; +} diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-v4l2.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-v4l2.c new file mode 100644 index 000000000000..b1b1bfda7eb1 --- /dev/null +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-v4l2.c @@ -0,0 +1,360 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for Renesas RZ/G2L CRU + * + * Copyright (C) 2022 Renesas Electronics Corp. + * + * Based on Renesas R-Car VIN + * Copyright (C) 2016 Renesas Electronics Corp. + * Copyright (C) 2011-2013 Renesas Solutions Corp. + * Copyright (C) 2013 Cogent Embedded, Inc., + * Copyright (C) 2008 Magnus Damm + */ + +#include + +#include +#include +#include +#include + +#include "rzg2l-cru.h" + +#define RZG2L_CRU_DEFAULT_FORMAT V4L2_PIX_FMT_UYVY +#define RZG2L_CRU_DEFAULT_WIDTH 800 +#define RZG2L_CRU_DEFAULT_HEIGHT 600 +#define RZG2L_CRU_DEFAULT_FIELD V4L2_FIELD_NONE +#define RZG2L_CRU_DEFAULT_COLORSPACE V4L2_COLORSPACE_SRGB + +/* ----------------------------------------------------------------------------- + * Format Conversions + */ + +static const struct v4l2_format_info rzg2l_cru_formats[] = { + { + .format = V4L2_PIX_FMT_UYVY, + .bpp[0] = 2, + }, +}; + +const struct v4l2_format_info *rzg2l_cru_format_from_pixel(u32 format) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(rzg2l_cru_formats); i++) + if (rzg2l_cru_formats[i].format == format) + return rzg2l_cru_formats + i; + + return NULL; +} + +static u32 rzg2l_cru_format_bytesperline(struct v4l2_pix_format *pix) +{ + const struct v4l2_format_info *fmt; + + fmt = rzg2l_cru_format_from_pixel(pix->pixelformat); + + if (WARN_ON(!fmt)) + return -EINVAL; + + return pix->width * fmt->bpp[0]; +} + +static u32 rzg2l_cru_format_sizeimage(struct v4l2_pix_format *pix) +{ + return pix->bytesperline * pix->height; +} + +static void rzg2l_cru_format_align(struct rzg2l_cru_dev *cru, + struct v4l2_pix_format *pix) +{ + if (!rzg2l_cru_format_from_pixel(pix->pixelformat)) + pix->pixelformat = RZG2L_CRU_DEFAULT_FORMAT; + + switch (pix->field) { + case V4L2_FIELD_TOP: + case V4L2_FIELD_BOTTOM: + case V4L2_FIELD_NONE: + case V4L2_FIELD_INTERLACED_TB: + case V4L2_FIELD_INTERLACED_BT: + case V4L2_FIELD_INTERLACED: + break; + default: + pix->field = RZG2L_CRU_DEFAULT_FIELD; + break; + } + + /* Limit to CRU capabilities */ + v4l_bound_align_image(&pix->width, 320, cru->info->max_width, 1, + &pix->height, 240, cru->info->max_height, 2, 0); + + pix->bytesperline = rzg2l_cru_format_bytesperline(pix); + pix->sizeimage = rzg2l_cru_format_sizeimage(pix); + + dev_dbg(cru->dev, "Format %ux%u bpl: %u size: %u\n", + pix->width, pix->height, pix->bytesperline, pix->sizeimage); +} + +static void rzg2l_cru_try_format(struct rzg2l_cru_dev *cru, + struct v4l2_pix_format *pix) +{ + /* + * The V4L2 specification clearly documents the colorspace fields + * as being set by drivers for capture devices. Using the values + * supplied by userspace thus wouldn't comply with the API. Until + * the API is updated force fixed values. + */ + pix->colorspace = RZG2L_CRU_DEFAULT_COLORSPACE; + pix->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix->colorspace); + pix->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix->colorspace); + pix->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true, pix->colorspace, + pix->ycbcr_enc); + + rzg2l_cru_format_align(cru, pix); +} + +static int rzg2l_cru_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct rzg2l_cru_dev *cru = video_drvdata(file); + + strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); + strscpy(cap->card, "RZG2L_CRU", sizeof(cap->card)); + snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", + dev_name(cru->dev)); + return 0; +} + +static int rzg2l_cru_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct rzg2l_cru_dev *cru = video_drvdata(file); + + rzg2l_cru_try_format(cru, &f->fmt.pix); + + return 0; +} + +static int rzg2l_cru_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct rzg2l_cru_dev *cru = video_drvdata(file); + + if (vb2_is_busy(&cru->queue)) + return -EBUSY; + + rzg2l_cru_try_format(cru, &f->fmt.pix); + + cru->format = f->fmt.pix; + + cru->compose.top = 0; + cru->compose.left = 0; + cru->compose.width = cru->format.width; + cru->compose.height = cru->format.height; + + return 0; +} + +static int rzg2l_cru_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct rzg2l_cru_dev *cru = video_drvdata(file); + + f->fmt.pix = cru->format; + + return 0; +} + +static int rzg2l_cru_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + if (f->index >= ARRAY_SIZE(rzg2l_cru_formats)) + return -EINVAL; + + f->pixelformat = rzg2l_cru_formats[f->index].format; + + return 0; +} + +static int rzg2l_cru_subscribe_event(struct v4l2_fh *fh, + const struct v4l2_event_subscription *sub) +{ + switch (sub->type) { + case V4L2_EVENT_SOURCE_CHANGE: + return v4l2_event_subscribe(fh, sub, 4, NULL); + } + return v4l2_ctrl_subscribe_event(fh, sub); +} + +static const struct v4l2_ioctl_ops rzg2l_cru_ioctl_ops = { + .vidioc_querycap = rzg2l_cru_querycap, + .vidioc_try_fmt_vid_cap = rzg2l_cru_try_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = rzg2l_cru_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = rzg2l_cru_s_fmt_vid_cap, + .vidioc_enum_fmt_vid_cap = rzg2l_cru_enum_fmt_vid_cap, + + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_expbuf = vb2_ioctl_expbuf, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + + .vidioc_log_status = v4l2_ctrl_log_status, + .vidioc_subscribe_event = rzg2l_cru_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +/* ----------------------------------------------------------------------------- + * Media controller file operations + */ + +static int rzg2l_cru_open(struct file *file) +{ + struct rzg2l_cru_dev *cru = video_drvdata(file); + int ret; + + ret = pm_runtime_resume_and_get(cru->dev); + if (ret < 0) + return ret; + + ret = mutex_lock_interruptible(&cru->lock); + if (ret) + goto err_pm; + + file->private_data = cru; + ret = v4l2_fh_open(file); + if (ret) + goto err_unlock; + + ret = v4l2_pipeline_pm_get(&cru->vdev.entity); + if (ret < 0) + goto err_open; + + ret = v4l2_ctrl_handler_setup(&cru->ctrl_handler); + if (ret) + goto err_power; + + mutex_unlock(&cru->lock); + + return 0; +err_power: + v4l2_pipeline_pm_put(&cru->vdev.entity); +err_open: + v4l2_fh_release(file); +err_unlock: + mutex_unlock(&cru->lock); +err_pm: + pm_runtime_put(cru->dev); + + return ret; +} + +static int rzg2l_cru_release(struct file *file) +{ + struct rzg2l_cru_dev *cru = video_drvdata(file); + int ret; + + mutex_lock(&cru->lock); + + /* the release helper will cleanup any on-going streaming. */ + ret = _vb2_fop_release(file, NULL); + + v4l2_pipeline_pm_put(&cru->vdev.entity); + pm_runtime_put(cru->dev); + + mutex_unlock(&cru->lock); + + return ret; +} + +static const struct v4l2_file_operations rzg2l_cru_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = video_ioctl2, + .open = rzg2l_cru_open, + .release = rzg2l_cru_release, + .poll = vb2_fop_poll, + .mmap = vb2_fop_mmap, + .read = vb2_fop_read, +}; + +void rzg2l_cru_v4l2_unregister(struct rzg2l_cru_dev *cru) +{ + if (!video_is_registered(&cru->vdev)) + return; + + v4l2_info(&cru->v4l2_dev, "Removed %s\n", + video_device_node_name(&cru->vdev)); + + /* Checks internally if vdev have been init or not */ + video_unregister_device(&cru->vdev); +} + +static void rzg2l_cru_notify(struct v4l2_subdev *sd, + unsigned int notification, void *arg) +{ + struct rzg2l_cru_dev *cru = + container_of(sd->v4l2_dev, struct rzg2l_cru_dev, v4l2_dev); + struct v4l2_subdev *remote; + struct media_pad *pad; + + pad = media_entity_remote_pad(&cru->pad); + if (!pad) + return; + + remote = media_entity_to_v4l2_subdev(pad->entity); + if (remote != sd) + return; + + switch (notification) { + case V4L2_DEVICE_NOTIFY_EVENT: + v4l2_event_queue(&cru->vdev, arg); + break; + } +} + +int rzg2l_cru_v4l2_register(struct rzg2l_cru_dev *cru) +{ + struct video_device *vdev = &cru->vdev; + int ret; + + cru->v4l2_dev.notify = rzg2l_cru_notify; + + /* video node */ + vdev->v4l2_dev = &cru->v4l2_dev; + vdev->queue = &cru->queue; + snprintf(vdev->name, sizeof(vdev->name), "CRU output"); + vdev->release = video_device_release_empty; + vdev->lock = &cru->lock; + vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | + V4L2_CAP_READWRITE; + + /* Set a default format */ + cru->format.pixelformat = RZG2L_CRU_DEFAULT_FORMAT; + cru->format.width = RZG2L_CRU_DEFAULT_WIDTH; + cru->format.height = RZG2L_CRU_DEFAULT_HEIGHT; + cru->format.field = RZG2L_CRU_DEFAULT_FIELD; + cru->format.colorspace = RZG2L_CRU_DEFAULT_COLORSPACE; + + vdev->device_caps |= V4L2_CAP_IO_MC; + vdev->fops = &rzg2l_cru_fops; + vdev->ioctl_ops = &rzg2l_cru_ioctl_ops; + + rzg2l_cru_format_align(cru, &cru->format); + + ret = video_register_device(&cru->vdev, VFL_TYPE_VIDEO, -1); + if (ret) { + dev_err(cru->dev, "Failed to register video device\n"); + return ret; + } + + video_set_drvdata(&cru->vdev, cru); + + v4l2_info(&cru->v4l2_dev, "Device registered as %s\n", + video_device_node_name(&cru->vdev)); + + return ret; +} From patchwork Fri Jan 21 01:05:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar X-Patchwork-Id: 12719213 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A66A6C433F5 for ; Fri, 21 Jan 2022 01:06:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236490AbiAUBGU (ORCPT ); Thu, 20 Jan 2022 20:06:20 -0500 Received: from relmlor2.renesas.com ([210.160.252.172]:19483 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S235635AbiAUBGS (ORCPT ); Thu, 20 Jan 2022 20:06:18 -0500 X-IronPort-AV: E=Sophos;i="5.88,303,1635174000"; d="scan'208";a="107750945" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 21 Jan 2022 10:06:17 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id C84404177B49; Fri, 21 Jan 2022 10:06:13 +0900 (JST) From: Lad Prabhakar To: =?utf-8?q?Niklas_S=C3=B6derlund?= , Jacopo Mondi , Philipp Zabel , Mauro Carvalho Chehab , Rob Herring , Laurent Pinchart , Sakari Ailus , Hans Verkuil Cc: Geert Uytterhoeven , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [RFC PATCH v2 4/4] media: platform: Add Renesas RZ/G2L MIPI CSI-2 receiver driver Date: Fri, 21 Jan 2022 01:05:43 +0000 Message-Id: <20220121010543.31385-5-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220121010543.31385-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20220121010543.31385-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add MIPI CSI-2 receiver driver for Renesas RZ/G2L. The MIPI CSI-2 is part of the CRU module found on RZ/G2L family. Based on a patch in the BSP by Hien Huynh Signed-off-by: Lad Prabhakar --- Hi Laurent, The CSI subdev uses multistream and subdev state patches. Only pending thing is the driver implements multiple pads for VC's (which should be only one) Im working on the ov5645 sensor to use multistream to support VC's. For the next non-RFC version I'll implement as single pad for all VC's. Cheers, Prabhakar v1->v2 * new patch (split up as new driver compared to v1) --- .../media/platform/renesas/rzg2l-cru/Kconfig | 13 + .../media/platform/renesas/rzg2l-cru/Makefile | 1 + .../platform/renesas/rzg2l-cru/rzg2l-csi2.c | 928 ++++++++++++++++++ 3 files changed, 942 insertions(+) create mode 100644 drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c diff --git a/drivers/media/platform/renesas/rzg2l-cru/Kconfig b/drivers/media/platform/renesas/rzg2l-cru/Kconfig index 310baa4d4c14..91a9617b44ec 100644 --- a/drivers/media/platform/renesas/rzg2l-cru/Kconfig +++ b/drivers/media/platform/renesas/rzg2l-cru/Kconfig @@ -1,4 +1,17 @@ # SPDX-License-Identifier: GPL-2.0 +config VIDEO_RZG2L_CSI2 + tristate "RZ/G2L MIPI CSI-2 Receiver" + depends on VIDEO_V4L2 && OF + depends on ARCH_RENESAS || COMPILE_TEST + select MEDIA_CONTROLLER + select VIDEO_V4L2_SUBDEV_API + select RESET_CONTROLLER + select V4L2_FWNODE + help + Support for Renesas RZ/G2L MIPI CSI-2 Receiver driver. + + To compile this driver as a module, choose M here: the + module will be called rzg2l-csi2. config VIDEO_RZG2L_CRU tristate "RZ/G2L Camera Receiving Unit (CRU) Driver" diff --git a/drivers/media/platform/renesas/rzg2l-cru/Makefile b/drivers/media/platform/renesas/rzg2l-cru/Makefile index 8c307075f131..8cb4f4550df9 100644 --- a/drivers/media/platform/renesas/rzg2l-cru/Makefile +++ b/drivers/media/platform/renesas/rzg2l-cru/Makefile @@ -1,4 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 rzg2l-cru-objs = rzg2l-core.o rzg2l-dma.o rzg2l-v4l2.o +obj-$(CONFIG_VIDEO_RZG2L_CSI2) += rzg2l-csi2.o obj-$(CONFIG_VIDEO_RZG2L_CRU) += rzg2l-cru.o diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c new file mode 100644 index 000000000000..ae27c9504c50 --- /dev/null +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c @@ -0,0 +1,928 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for Renesas RZ/G2L MIPI CSI-2 Receiver + * + * Copyright (C) 2022 Renesas Electronics Corp. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +/* LINK registers */ +/* Module Configuration Register */ +#define CSI2nMCG 0x0 +#define CSI2nMCG_SDLN GENMASK(11, 8) + +/* Module Control Register 0 */ +#define CSI2nMCT0 0x10 +#define CSI2nMCT0_VDLN(x) ((x) << 0) + +/* Module Control Register 2 */ +#define CSI2nMCT2 0x18 +#define CSI2nMCT2_FRRSKW(x) ((x) << 16) +#define CSI2nMCT2_FRRCLK(x) ((x) << 0) + +/* Module Control Register 3 */ +#define CSI2nMCT3 0x1c +#define CSI2nMCT3_RXEN BIT(0) + +/* Reset Control Register */ +#define CSI2nRTCT 0x28 +#define CSI2nRTCT_VSRST BIT(0) + +/* Reset Status Register */ +#define CSI2nRTST 0x2c +#define CSI2nRTST_VSRSTS BIT(0) + +/* Receive Data Type Enable Low Register */ +#define CSI2nDTEL 0x60 + +/* Receive Data Type Enable High Register */ +#define CSI2nDTEH 0x64 + +/* DPHY registers */ +/* D-PHY Control Register 0 */ +#define CSIDPHYCTRL0 0x400 +#define CSIDPHYCTRL0_EN_LDO1200 BIT(1) +#define CSIDPHYCTRL0_EN_BGR BIT(0) + +/* D-PHY Timing Register 0 */ +#define CSIDPHYTIM0 0x404 +#define CSIDPHYTIM0_TCLK_MISS(x) ((x) << 24) +#define CSIDPHYTIM0_T_INIT(x) ((x) << 0) + +/* D-PHY Timing Register 1 */ +#define CSIDPHYTIM1 0x408 +#define CSIDPHYTIM1_THS_PREPARE(x) ((x) << 24) +#define CSIDPHYTIM1_TCLK_PREPARE(x) ((x) << 16) +#define CSIDPHYTIM1_THS_SETTLE(x) ((x) << 8) + +#define VSRSTS_TIMEOUT_MS 100 +#define VSRSTS_RETRIES 20 + +struct timings { + u32 t_init; + u32 tclk_miss; + u32 tclk_settle; + u32 ths_settle; + u32 tclk_prepare; + u32 ths_prepare; +}; + +enum dphy_timings { + TRANSMISSION_RATE_80_MBPS = 0, + TRANSMISSION_RATE_125_MBPS, + TRANSMISSION_RATE_250_MBPS, + TRANSMISSION_RATE_360_MBPS, + TRANSMISSION_RATE_360_PLUS_MBPS, +}; + +static const struct timings global_timings[] = { + [TRANSMISSION_RATE_80_MBPS] = { + .t_init = 79801, + .tclk_miss = 4, + .tclk_settle = 23, + .ths_settle = 31, + .tclk_prepare = 10, + .ths_prepare = 19, + }, + [TRANSMISSION_RATE_125_MBPS] = { + .t_init = 79801, + .tclk_miss = 4, + .tclk_settle = 23, + .ths_settle = 28, + .tclk_prepare = 10, + .ths_prepare = 19, + }, + [TRANSMISSION_RATE_250_MBPS] = { + .t_init = 79801, + .tclk_miss = 4, + .tclk_settle = 23, + .ths_settle = 22, + .tclk_prepare = 10, + .ths_prepare = 16, + }, + [TRANSMISSION_RATE_360_MBPS] = { + .t_init = 79801, + .tclk_miss = 4, + .tclk_settle = 18, + .ths_settle = 19, + .tclk_prepare = 10, + .ths_prepare = 10, + }, + [TRANSMISSION_RATE_360_PLUS_MBPS] = { + .t_init = 79801, + .tclk_miss = 4, + .tclk_settle = 18, + .ths_settle = 18, + .tclk_prepare = 10, + .ths_prepare = 10, + }, +}; + +struct rzg2l_csi2_format { + u32 code; + unsigned int datatype; + unsigned int bpp; +}; + +static const struct rzg2l_csi2_format rzg2l_csi2_formats[] = { + { .code = MEDIA_BUS_FMT_UYVY8_2X8, .datatype = 0x1e, .bpp = 16 }, +}; + +static const struct rzg2l_csi2_format *rzg2l_csi2_code_to_fmt(unsigned int code) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(rzg2l_csi2_formats); i++) + if (rzg2l_csi2_formats[i].code == code) + return &rzg2l_csi2_formats[i]; + + return NULL; +} + +static const struct rzg2l_csi2_format *rzg2l_csi2_datatype_to_fmt(unsigned int dt) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(rzg2l_csi2_formats); i++) + if (rzg2l_csi2_formats[i].datatype == dt) + return &rzg2l_csi2_formats[i]; + + return NULL; +} + +enum rzg2l_csi2_pads { + RZG2L_CSI2_SINK = 0, + RZG2L_CSI2_SOURCE_VC0, + RZG2L_CSI2_SOURCE_VC1, + RZG2L_CSI2_SOURCE_VC2, + RZG2L_CSI2_SOURCE_VC3, + NR_OF_RZG2L_CSI2_PAD, +}; + +struct rzg2l_csi2 { + struct device *dev; + void __iomem *base; + struct reset_control *rstc; + unsigned long vclk_rate; + + struct v4l2_subdev subdev; + struct media_pad pads[NR_OF_RZG2L_CSI2_PAD]; + + struct v4l2_async_notifier notifier; + struct v4l2_async_subdev asd; + struct v4l2_subdev *remote; + + struct mutex lock; + int stream_count; + + unsigned short lanes; + + unsigned long hsfreq; +}; + +static inline struct rzg2l_csi2 *sd_to_csi2(struct v4l2_subdev *sd) +{ + return container_of(sd, struct rzg2l_csi2, subdev); +} + +static inline struct rzg2l_csi2 *notifier_to_csi2(struct v4l2_async_notifier *n) +{ + return container_of(n, struct rzg2l_csi2, notifier); +} + +static u32 rzg2l_csi2_read(struct rzg2l_csi2 *csi2, unsigned int reg) +{ + return ioread32(csi2->base + reg); +} + +static void rzg2l_csi2_write(struct rzg2l_csi2 *csi2, unsigned int reg, + u32 data) +{ + iowrite32(data, csi2->base + reg); +} + +static void rzg2l_csi2_set(struct rzg2l_csi2 *csi2, unsigned int reg, u32 set) +{ + rzg2l_csi2_write(csi2, reg, rzg2l_csi2_read(csi2, reg) | set); +} + +static void rzg2l_csi2_clr(struct rzg2l_csi2 *csi2, unsigned int reg, u32 clr) +{ + rzg2l_csi2_write(csi2, reg, rzg2l_csi2_read(csi2, reg) & ~clr); +} + +/* ----------------------------------------------------------------------------- + * DPHY setting + */ + +static int rzg2l_csi2_dphy_setting(struct rzg2l_csi2 *csi2, bool on) +{ + int ret = 0; + + if (on) { + struct timings dphy_timing; + u32 dphytim0, dphytim1; + + /* Release reset state */ + ret = reset_control_deassert(csi2->rstc); + if (ret) + return ret; + + /* Wait until the power stabilizes */ + mdelay(1); + + /* Set DPHY timing parameters */ + if (csi2->hsfreq <= 80) + dphy_timing = global_timings[TRANSMISSION_RATE_80_MBPS]; + else if (csi2->hsfreq > 80 && csi2->hsfreq <= 125) + dphy_timing = global_timings[TRANSMISSION_RATE_125_MBPS]; + else if (csi2->hsfreq > 125 && csi2->hsfreq <= 250) + dphy_timing = global_timings[TRANSMISSION_RATE_250_MBPS]; + else if (csi2->hsfreq > 250 && csi2->hsfreq <= 360) + dphy_timing = global_timings[TRANSMISSION_RATE_360_MBPS]; + else if (csi2->hsfreq > 360 && csi2->hsfreq <= 1500) + dphy_timing = global_timings[TRANSMISSION_RATE_360_PLUS_MBPS]; + else + return -EINVAL; + + dphytim0 = CSIDPHYTIM0_TCLK_MISS(dphy_timing.tclk_miss) | + CSIDPHYTIM0_T_INIT(dphy_timing.t_init); + dphytim1 = CSIDPHYTIM1_THS_PREPARE(dphy_timing.ths_prepare) | + CSIDPHYTIM1_TCLK_PREPARE(dphy_timing.tclk_prepare) | + CSIDPHYTIM1_THS_SETTLE(dphy_timing.ths_settle) | + CSIDPHYTIM1_THS_SETTLE(dphy_timing.tclk_settle); + + rzg2l_csi2_write(csi2, CSIDPHYTIM0, dphytim0); + rzg2l_csi2_write(csi2, CSIDPHYTIM1, dphytim1); + + /* Set the EN_BGR bit */ + rzg2l_csi2_set(csi2, CSIDPHYCTRL0, CSIDPHYCTRL0_EN_BGR); + + /* Delay 20us to be stable */ + usleep_range(20, 40); + + /* Set the EN_LDO1200 bit */ + rzg2l_csi2_set(csi2, CSIDPHYCTRL0, CSIDPHYCTRL0_EN_LDO1200); + + /* Delay 10us to be stable */ + usleep_range(10, 20); + } else { + /* Cancel the EN_LDO1200 register setting */ + rzg2l_csi2_clr(csi2, CSIDPHYCTRL0, CSIDPHYCTRL0_EN_LDO1200); + + /* Cancel the EN_BGR register setting */ + rzg2l_csi2_clr(csi2, CSIDPHYCTRL0, CSIDPHYCTRL0_EN_BGR); + + /* Set reset state */ + reset_control_assert(csi2->rstc); + } + + return ret; +} + +static int rzg2l_csi2_calc_mbps(struct rzg2l_csi2 *csi2, + struct v4l2_mbus_frame_desc *fd, + unsigned int lanes) +{ + const struct v4l2_mbus_frame_desc_entry_csi2 *csi2_desc; + const struct rzg2l_csi2_format *format; + struct v4l2_subdev *source; + struct v4l2_ctrl *ctrl; + unsigned int i; + u64 mbps; + + if (!csi2->remote) + return -ENODEV; + + source = csi2->remote; + + /* Read the pixel rate control from remote. */ + ctrl = v4l2_ctrl_find(source->ctrl_handler, V4L2_CID_PIXEL_RATE); + if (!ctrl) { + dev_err(csi2->dev, "no pixel rate control in subdev %s\n", + source->name); + return -EINVAL; + } + + /* Verify that all remote streams send the same datatype. */ + csi2_desc = NULL; + for (i = 0; i < fd->num_entries; i++) { + struct v4l2_mbus_frame_desc_entry_csi2 *stream_desc; + + stream_desc = &fd->entry[i].bus.csi2; + if (!csi2_desc) + csi2_desc = stream_desc; + + if (csi2_desc->dt != stream_desc->dt) { + dev_err(csi2->dev, + "Remote streams with different DT: %u - %u\n", + csi2_desc->dt, stream_desc->dt); + return -EINVAL; + } + } + format = rzg2l_csi2_datatype_to_fmt(csi2_desc->dt); + if (!format) + return -EINVAL; + + /* + * Calculate hsfreq in Mbps + * hsfreq = (pixel_rate * bits_per_sample) / number_of_lanes + */ + mbps = v4l2_ctrl_g_ctrl_int64(ctrl) * format->bpp; + do_div(mbps, csi2->lanes * 1000000); + + return mbps; +} + +static void rzg2l_csi2_stop(struct rzg2l_csi2 *csi2) +{ + unsigned int timeout = VSRSTS_RETRIES; + + /* Stop DPHY reception */ + rzg2l_csi2_dphy_setting(csi2, 0); + + /* Stop LINK reception */ + rzg2l_csi2_clr(csi2, CSI2nMCT3, CSI2nMCT3_RXEN); + + /* Request a software reset of the LINK Video Pixel Interface */ + rzg2l_csi2_write(csi2, CSI2nRTCT, CSI2nRTCT_VSRST); + + while (timeout--) { + /* Make sure that the execution status is not during a reset */ + if (!(rzg2l_csi2_read(csi2, CSI2nRTST) & CSI2nRTST_VSRSTS)) + break; + msleep(VSRSTS_TIMEOUT_MS); + }; + if (!timeout) + dev_err(csi2->dev, "CSI2nRTCT_VSRST bit is not cleared\n"); +} + +static int rzg2l_csi2_get_remote_frame_desc(struct rzg2l_csi2 *csi2, + struct v4l2_mbus_frame_desc *fd) +{ + struct media_pad *pad; + int ret; + + if (!csi2->remote) + return -ENODEV; + + pad = media_entity_remote_pad(&csi2->pads[RZG2L_CSI2_SINK]); + if (!pad) + return -ENODEV; + + ret = v4l2_subdev_call(csi2->remote, pad, get_frame_desc, + pad->index, fd); + if (ret) + return ret; + + if (fd->type != V4L2_MBUS_FRAME_DESC_TYPE_CSI2) { + dev_err(csi2->dev, "Frame desc do not describe CSI-2 link"); + return -EINVAL; + } + + return 0; +} + +static int rzg2l_csi2_start(struct rzg2l_csi2 *csi2) +{ + unsigned long vclk_rate = csi2->vclk_rate / HZ_PER_MHZ; + u32 frrskw, frrclk, frrskw_coeff, frrclk_coeff; + struct v4l2_mbus_frame_desc fd; + int lanes, mbps, ret; + + /* Get information about multiplexed link. */ + ret = rzg2l_csi2_get_remote_frame_desc(csi2, &fd); + if (ret) + return ret; + + /* Checking the maximum lanes support for CSI-2 module */ + lanes = (rzg2l_csi2_read(csi2, CSI2nMCG) & CSI2nMCG_SDLN) >> 8; + if (lanes < csi2->lanes) { + dev_err(csi2->dev, + "Failed to support %d data lanes\n", csi2->lanes); + return -EINVAL; + } + + mbps = rzg2l_csi2_calc_mbps(csi2, &fd, lanes); + if (mbps < 0) + return mbps; + + csi2->hsfreq = mbps; + + /* Initialize DPHY */ + ret = rzg2l_csi2_dphy_setting(csi2, 1); + if (ret) { + rzg2l_csi2_dphy_setting(csi2, 0); + return ret; + } + + rzg2l_csi2_write(csi2, CSI2nMCT0, CSI2nMCT0_VDLN(csi2->lanes)); + + frrskw_coeff = 3 * vclk_rate * 8; + frrclk_coeff = frrskw_coeff / 2; + frrskw = DIV_ROUND_UP(frrskw_coeff, csi2->hsfreq); + frrclk = DIV_ROUND_UP(frrclk_coeff, csi2->hsfreq); + rzg2l_csi2_write(csi2, CSI2nMCT2, + CSI2nMCT2_FRRSKW(frrskw) | CSI2nMCT2_FRRCLK(frrclk)); + + /* Select data type. */ + rzg2l_csi2_write(csi2, CSI2nDTEL, 0xf778ff0f); + rzg2l_csi2_write(csi2, CSI2nDTEH, 0x00ffff1f); + + /* Enable LINK reception */ + rzg2l_csi2_set(csi2, CSI2nMCT3, CSI2nMCT3_RXEN); + + return 0; +} + +static int rzg2l_csi2_s_stream(struct v4l2_subdev *sd, int enable) +{ + struct rzg2l_csi2 *csi2 = sd_to_csi2(sd); + int ret = 0; + + mutex_lock(&csi2->lock); + + if (!csi2->remote) { + ret = -ENODEV; + goto out; + } + + if (enable && !csi2->stream_count) { + pm_runtime_get_sync(csi2->dev); + + ret = rzg2l_csi2_start(csi2); + if (ret) { + pm_runtime_put(csi2->dev); + goto out; + } + + ret = v4l2_subdev_call(csi2->remote, video, s_stream, 1); + if (ret) { + rzg2l_csi2_stop(csi2); + pm_runtime_put(csi2->dev); + goto out; + } + } else if (!enable && csi2->stream_count == 1) { + v4l2_subdev_call(csi2->remote, video, s_stream, 0); + rzg2l_csi2_stop(csi2); + pm_runtime_put(csi2->dev); + } + + csi2->stream_count += enable ? 1 : -1; +out: + mutex_unlock(&csi2->lock); + + return ret; +} + +static int rzg2l_csi2_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad, + struct v4l2_mbus_frame_desc *fd) +{ + struct v4l2_subdev_state *state; + struct v4l2_subdev_route *route; + int ret = 0; + + if (pad < RZG2L_CSI2_SOURCE_VC0 || pad > RZG2L_CSI2_SOURCE_VC3) + return -EINVAL; + + state = v4l2_subdev_lock_active_state(sd); + + memset(fd, 0, sizeof(*fd)); + + for_each_active_route(&state->routing, route) { + const struct rzg2l_csi2_format *csi2_fmt; + struct v4l2_mbus_framefmt *fmt; + + if (route->source_pad != pad) + continue; + + fmt = v4l2_state_get_stream_format(state, pad, + route->source_stream); + if (!fmt) { + ret = -EINVAL; + goto out; + } + + csi2_fmt = rzg2l_csi2_code_to_fmt(fmt->code); + + /* Only one stream per 'channel' is allowed. */ + fd->entry[0].pixelcode = fmt->code; + fd->entry[0].length = fmt->width * fmt->height * csi2_fmt->bpp / 8; + fd->entry[0].flags = V4L2_MBUS_FRAME_DESC_FL_LEN_MAX; + + /* + * The sink stream id corresponds to the CSI-2 Virtual Channel + * which is output on the channel identified by the current + * source pad. + */ + fd->entry[0].bus.csi2.vc = route->sink_stream; + fd->entry[0].bus.csi2.dt = csi2_fmt->datatype; + + fd->num_entries = 1; + + break; + } + + fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2; + +out: + v4l2_subdev_unlock_state(state); + + return ret; +} + +static int _rzg2l_csi2_set_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_krouting *routing) +{ + int ret; + + ret = v4l2_subdev_routing_validate_1_to_1(routing); + if (ret) + return ret; + + v4l2_subdev_lock_state(state); + + ret = v4l2_subdev_set_routing(sd, state, routing); + + v4l2_subdev_unlock_state(state); + + return ret; +} + +static int rzg2l_csi2_set_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + enum v4l2_subdev_format_whence which, + struct v4l2_subdev_krouting *routing) +{ + return _rzg2l_csi2_set_routing(sd, state, routing); +} + +static int rzg2l_csi2_init_config(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state) +{ + /* One route for each virtual channel. Route 0 enabled by default. */ + struct v4l2_subdev_route routes[] = { + { + .sink_pad = RZG2L_CSI2_SINK, + .sink_stream = 0, + .source_pad = RZG2L_CSI2_SOURCE_VC0, + .source_stream = 0, + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE, + }, + { + .sink_pad = RZG2L_CSI2_SINK, + .sink_stream = 1, + .source_pad = RZG2L_CSI2_SOURCE_VC1, + .source_stream = 0, + .flags = 0, + }, + { + .sink_pad = RZG2L_CSI2_SINK, + .sink_stream = 2, + .source_pad = RZG2L_CSI2_SOURCE_VC2, + .source_stream = 2, + .flags = 0, + }, + { + .sink_pad = RZG2L_CSI2_SINK, + .sink_stream = 3, + .source_pad = RZG2L_CSI2_SOURCE_VC3, + .source_stream = 0, + .flags = 0, + }, + }; + struct v4l2_subdev_krouting routing = { + .num_routes = ARRAY_SIZE(routes), + .routes = routes, + }; + + return _rzg2l_csi2_set_routing(sd, state, &routing); +} + +static int rzg2l_csi2_set_format(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_format *format) +{ + struct v4l2_mbus_framefmt *fmt; + int ret = 0; + + if (!rzg2l_csi2_code_to_fmt(format->format.code)) + format->format.code = rzg2l_csi2_formats[0].code; + + /* + * Format is propagated from sink streams to source streams, so + * disallow setting format on the source pads. + */ + if (format->pad > RZG2L_CSI2_SINK) + return -EINVAL; + + v4l2_subdev_lock_state(state); + + fmt = v4l2_state_get_stream_format(state, format->pad, + format->stream); + if (!fmt) { + ret = -EINVAL; + goto out; + } + *fmt = format->format; + + /* Propagate format to the other end of the route. */ + fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad, + format->stream); + if (!fmt) { + ret = -EINVAL; + goto out; + } + *fmt = format->format; + +out: + v4l2_subdev_unlock_state(state); + + return ret; +} + +static const struct v4l2_subdev_video_ops rzg2l_csi2_video_ops = { + .s_stream = rzg2l_csi2_s_stream, +}; + +static const struct v4l2_subdev_pad_ops rzg2l_csi2_pad_ops = { + .init_cfg = rzg2l_csi2_init_config, + .set_fmt = rzg2l_csi2_set_format, + .get_fmt = v4l2_subdev_get_fmt, + .get_frame_desc = rzg2l_csi2_get_frame_desc, + .set_routing = rzg2l_csi2_set_routing, +}; + +static const struct v4l2_subdev_ops rzg2l_csi2_subdev_ops = { + .video = &rzg2l_csi2_video_ops, + .pad = &rzg2l_csi2_pad_ops, +}; + +/* ----------------------------------------------------------------------------- + * Async handling and registration of subdevices and links. + */ + +static int rzg2l_csi2_notify_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct rzg2l_csi2 *csi2 = notifier_to_csi2(notifier); + int pad; + + if (!v4l2_subdev_has_op(subdev, pad, get_frame_desc)) { + dev_err(csi2->dev, + "Subdev %s bound failed: missing get_frame_desc()\n", + subdev->name); + return -EINVAL; + } + + pad = media_entity_get_fwnode_pad(&subdev->entity, asd->match.fwnode, + MEDIA_PAD_FL_SOURCE); + if (pad < 0) { + dev_err(csi2->dev, "Failed to find pad for %s\n", subdev->name); + return pad; + } + + csi2->remote = subdev; + + dev_dbg(csi2->dev, "Bound %s pad: %d\n", subdev->name, pad); + + return media_create_pad_link(&subdev->entity, pad, + &csi2->subdev.entity, 0, + MEDIA_LNK_FL_ENABLED | + MEDIA_LNK_FL_IMMUTABLE); +} + +static void rzg2l_csi2_notify_unbind(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct rzg2l_csi2 *csi2 = notifier_to_csi2(notifier); + + csi2->remote = NULL; + + dev_dbg(csi2->dev, "Unbind %s\n", subdev->name); +} + +static const struct v4l2_async_notifier_operations rzg2l_csi2_notify_ops = { + .bound = rzg2l_csi2_notify_bound, + .unbind = rzg2l_csi2_notify_unbind, +}; + +static int rzg2l_csi2_parse_v4l2(struct rzg2l_csi2 *csi2, + struct v4l2_fwnode_endpoint *vep) +{ + /* Only port 0 endpoint 0 is valid. */ + if (vep->base.port || vep->base.id) + return -ENOTCONN; + + if (vep->bus_type != V4L2_MBUS_CSI2_DPHY) { + dev_err(csi2->dev, "Unsupported bus: %u\n", vep->bus_type); + return -EINVAL; + } + + csi2->lanes = vep->bus.mipi_csi2.num_data_lanes; + if (csi2->lanes != 1 && csi2->lanes != 2 && csi2->lanes != 4) { + dev_err(csi2->dev, "Unsupported number of data-lanes: %u\n", + csi2->lanes); + return -EINVAL; + } + + return 0; +} + +static int rzg2l_csi2_parse_dt(struct rzg2l_csi2 *csi2) +{ + struct v4l2_fwnode_endpoint v4l2_ep = { + .bus_type = V4L2_MBUS_CSI2_DPHY + }; + struct v4l2_async_subdev *asd; + struct fwnode_handle *fwnode; + struct fwnode_handle *ep; + int ret; + + ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(csi2->dev), 0, 0, 0); + if (!ep) { + dev_err(csi2->dev, "Not connected to subdevice\n"); + return -EINVAL; + } + + ret = v4l2_fwnode_endpoint_parse(ep, &v4l2_ep); + if (ret) { + dev_err(csi2->dev, "Could not parse v4l2 endpoint\n"); + fwnode_handle_put(ep); + return -EINVAL; + } + + ret = rzg2l_csi2_parse_v4l2(csi2, &v4l2_ep); + if (ret) { + fwnode_handle_put(ep); + return ret; + } + + fwnode = fwnode_graph_get_remote_endpoint(ep); + fwnode_handle_put(ep); + + dev_dbg(csi2->dev, "Found '%pOF'\n", to_of_node(fwnode)); + + v4l2_async_nf_init(&csi2->notifier); + csi2->notifier.ops = &rzg2l_csi2_notify_ops; + + asd = v4l2_async_nf_add_fwnode(&csi2->notifier, fwnode, + struct v4l2_async_subdev); + fwnode_handle_put(fwnode); + if (IS_ERR(asd)) + return PTR_ERR(asd); + + ret = v4l2_async_subdev_nf_register(&csi2->subdev, &csi2->notifier); + if (ret) + v4l2_async_nf_cleanup(&csi2->notifier); + + return ret; +} + +/* ----------------------------------------------------------------------------- + * Platform Device Driver. + */ + +static const struct media_entity_operations rzg2l_csi2_entity_ops = { + .link_validate = v4l2_subdev_link_validate, +}; + +static int rzg2l_csi2_probe(struct platform_device *pdev) +{ + struct rzg2l_csi2 *csi2; + struct clk *vclk; + unsigned int i; + int ret; + + csi2 = devm_kzalloc(&pdev->dev, sizeof(*csi2), GFP_KERNEL); + if (!csi2) + return -ENOMEM; + + csi2->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(csi2->base)) + return PTR_ERR(csi2->base); + + csi2->rstc = devm_reset_control_get(&pdev->dev, "cmn-rstb"); + if (IS_ERR(csi2->rstc)) + return dev_err_probe(&pdev->dev, PTR_ERR(csi2->rstc), + "failed to get cpg cmn-rstb\n"); + + vclk = devm_clk_get(&pdev->dev, "vclk"); + if (IS_ERR(vclk)) + return dev_err_probe(&pdev->dev, PTR_ERR(vclk), + "failed to get vclk clock\n"); + + csi2->vclk_rate = clk_get_rate(vclk); + devm_clk_put(&pdev->dev, vclk); + + csi2->dev = &pdev->dev; + mutex_init(&csi2->lock); + csi2->stream_count = 0; + + platform_set_drvdata(pdev, csi2); + + ret = rzg2l_csi2_parse_dt(csi2); + if (ret) + goto error_mutex; + + csi2->subdev.owner = THIS_MODULE; + csi2->subdev.dev = &pdev->dev; + v4l2_subdev_init(&csi2->subdev, &rzg2l_csi2_subdev_ops); + v4l2_set_subdevdata(&csi2->subdev, &pdev->dev); + snprintf(csi2->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s %s", + KBUILD_MODNAME, dev_name(&pdev->dev)); + csi2->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_MULTIPLEXED; + + csi2->subdev.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; + csi2->subdev.entity.ops = &rzg2l_csi2_entity_ops; + + csi2->pads[RZG2L_CSI2_SINK].flags = MEDIA_PAD_FL_SINK; + for (i = RZG2L_CSI2_SOURCE_VC0; i < NR_OF_RZG2L_CSI2_PAD; i++) + csi2->pads[i].flags = MEDIA_PAD_FL_SOURCE; + + ret = media_entity_pads_init(&csi2->subdev.entity, NR_OF_RZG2L_CSI2_PAD, csi2->pads); + if (ret) + goto error_async; + + pm_runtime_enable(&pdev->dev); + + ret = v4l2_subdev_init_finalize(&csi2->subdev); + if (ret < 0) + goto error_pm; + + ret = v4l2_async_register_subdev(&csi2->subdev); + if (ret < 0) + goto error_subdev; + + dev_info(csi2->dev, "%d lanes found\n", csi2->lanes); + + return 0; + +error_subdev: + v4l2_subdev_cleanup(&csi2->subdev); +error_pm: + pm_runtime_disable(&pdev->dev); +error_async: + v4l2_async_nf_unregister(&csi2->notifier); + v4l2_async_nf_cleanup(&csi2->notifier); +error_mutex: + mutex_destroy(&csi2->lock); + + return ret; +} + +static const struct of_device_id rzg2l_csi2_of_table[] = { + { .compatible = "renesas,rzg2l-csi2", }, + { /* sentinel */ } +}; + +static int rzg2l_csi2_remove(struct platform_device *pdev) +{ + struct rzg2l_csi2 *csi2 = platform_get_drvdata(pdev); + + v4l2_async_nf_unregister(&csi2->notifier); + v4l2_async_nf_cleanup(&csi2->notifier); + v4l2_async_unregister_subdev(&csi2->subdev); + v4l2_subdev_cleanup(&csi2->subdev); + + pm_runtime_disable(&pdev->dev); + mutex_destroy(&csi2->lock); + + return 0; +} + +static struct platform_driver rzg2l_csi2_pdrv = { + .remove = rzg2l_csi2_remove, + .probe = rzg2l_csi2_probe, + .driver = { + .name = "rzg2l-csi2", + .of_match_table = rzg2l_csi2_of_table, + }, +}; + +module_platform_driver(rzg2l_csi2_pdrv); + +MODULE_DESCRIPTION("Renesas RZG2L MIPI CSI2 receiver driver"); +MODULE_LICENSE("GPL");