From patchwork Fri Dec 13 05:12:43 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arun Kumar K X-Patchwork-Id: 3337941 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 37C96C0D4A for ; Fri, 13 Dec 2013 05:13:08 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B8A9C207EF for ; Fri, 13 Dec 2013 05:13:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5B710207E4 for ; Fri, 13 Dec 2013 05:13:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751743Ab3LMFNC (ORCPT ); Fri, 13 Dec 2013 00:13:02 -0500 Received: from mail-pb0-f47.google.com ([209.85.160.47]:56118 "EHLO mail-pb0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751725Ab3LMFNA (ORCPT ); Fri, 13 Dec 2013 00:13:00 -0500 Received: by mail-pb0-f47.google.com with SMTP id um1so1861989pbc.6 for ; Thu, 12 Dec 2013 21:12:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=1l0zpcSA0ixRBNh/XjsefNhxX0VIu7PkiSxqQkU5E3c=; b=Iv3zS60s/0VsssDCfWJqsowgz5BqMLxluxAxrRff6WRDqjMq9VoOl8owDfnSF03YHC XcbLcYwmX8utQKIsa/KLfQalzTlg67lmmEWX43xC+uig0oWSgnHzw+zfWI/BDtBBLCjU aw6sn11vvKCjzPBC+0VpHwJM6lAIbK+DcIjs6FqkgwulhA2O7+lhXsS1vhJEfGOqqBIG EcbDwImNsmbJ+POJxxrLiYLlvh5W9M+p5vekYkRzMAeNqxquBOz2l4C9qwAbPULrwPka 9Diixy7+Y4GtAi+md8Etb8DIQar+W+CIjsjd6SK+wuyJENdB03UoyPLIaEncEu85NbGV WU9w== X-Received: by 10.68.232.196 with SMTP id tq4mr865739pbc.166.1386911579612; Thu, 12 Dec 2013 21:12:59 -0800 (PST) Received: from localhost.localdomain ([115.113.119.130]) by mx.google.com with ESMTPSA id xv2sm1542831pbb.39.2013.12.12.21.12.55 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 12 Dec 2013 21:12:58 -0800 (PST) From: Arun Kumar K To: linux-media@vger.kernel.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org Cc: s.nawrocki@samsung.com, mark.rutland@arm.com, shaik.ameer@samsung.com, arunkk.samsung@gmail.com Subject: [PATCH v10 2/2] [media] exynos5-is: Add media device driver for exynos5 SoCs camera subsystem Date: Fri, 13 Dec 2013 10:42:43 +0530 Message-Id: <1386911563-26236-3-git-send-email-arun.kk@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1386911563-26236-1-git-send-email-arun.kk@samsung.com> References: <1386911563-26236-1-git-send-email-arun.kk@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Shaik Ameer Basha This patch adds a top level media device driver for the Exynos5 SoC series camera subsystem. The driver currently supports processing pipelines involving following IP blocks: * MIPI-CSIS MIPI CSI-2 bus front-end to the FIMC-LITE, image sensors with MIPI CSI-2 bus should be linked with FIMC-LITE through this sub-device. * FIMC-LITE Supports capture interface from device (Sensor, MIPI-CSIS) to memory. Supports interconnection (through internal data FIFO links) between devices like MIPI-CSIS and FIMC-IS. * FIMC-IS Camera ISP with multiple image processing and peripheral devices like I2C or SPI bus controllers. The G-Scaler IP is not yet supported. The media device creates two kinds of pipelines for connecting the above mentioned IP blocks. The pipeline0 contains Sensor, MIPI-CSIS and FIMC-LITE devices and allows to capture image data from external sensor to memory. Pipeline1 uses FIMC-IS components for image processing operations on the captured raw image data and provides scaled YUV image data at its output. Pipeline0 +--------+ +-----------+ +-----------+ +--------+ | Sensor | --> | MIPI-CSIS | --> | FIMC-LITE | --> | Memory | +--------+ +-----------+ +-----------+ +--------+ Pipeline1 +--------+ +---------+ +-----------+ +-----------+ | Memory | --> | ISP | --> | SCC | --> | SCP | +--------+ +---------+ +-----------+ +-----------+ Signed-off-by: Shaik Ameer Basha Signed-off-by: Arun Kumar K [s.nawrocki@samsung.com: improved the commit description] Signed-off-by: Sylwester Nawrocki --- drivers/media/platform/exynos5-is/exynos5-mdev.c | 1211 ++++++++++++++++++++++ drivers/media/platform/exynos5-is/exynos5-mdev.h | 126 +++ 2 files changed, 1337 insertions(+) create mode 100644 drivers/media/platform/exynos5-is/exynos5-mdev.c create mode 100644 drivers/media/platform/exynos5-is/exynos5-mdev.h diff --git a/drivers/media/platform/exynos5-is/exynos5-mdev.c b/drivers/media/platform/exynos5-is/exynos5-mdev.c new file mode 100644 index 0000000..1621d94 --- /dev/null +++ b/drivers/media/platform/exynos5-is/exynos5-mdev.c @@ -0,0 +1,1211 @@ +/* + * EXYNOS5 SoC series camera host interface media device driver + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Shaik Ameer Basha + * Arun Kumar K + * + * This driver is based on exynos4-is media device driver written by + * Sylwester Nawrocki . + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published + * by the Free Software Foundation, either version 2 of the License, + * or (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "exynos5-mdev.h" +#include "fimc-is.h" + +#define BAYER_CLK_NAME "sclk_bayer" + +/** + * fimc_pipeline_prepare - update pipeline information with subdevice pointers + * @me: media entity terminating the pipeline + * + * Caller holds the graph mutex. + */ +static void fimc_pipeline_prepare(struct fimc_pipeline *p, + struct media_entity *me) +{ + struct v4l2_subdev *sd; + int i; + + for (i = 0; i < IDX_MAX; i++) + p->subdevs[i] = NULL; + + while (1) { + struct media_pad *pad = NULL; + + /* Find remote source pad */ + for (i = 0; i < me->num_pads; i++) { + struct media_pad *spad = &me->pads[i]; + if (!(spad->flags & MEDIA_PAD_FL_SINK)) + continue; + pad = media_entity_remote_pad(spad); + if (pad) + break; + } + + if (pad == NULL || + media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) { + break; + } + sd = media_entity_to_v4l2_subdev(pad->entity); + + switch (sd->grp_id) { + case GRP_ID_FIMC_IS_SENSOR: + case GRP_ID_SENSOR: + p->subdevs[IDX_SENSOR] = sd; + break; + case GRP_ID_CSIS: + p->subdevs[IDX_CSIS] = sd; + break; + case GRP_ID_FLITE: + p->subdevs[IDX_FLITE] = sd; + break; + default: + pr_warn("%s: Unknown subdev grp_id: %#x\n", + __func__, sd->grp_id); + } + me = &sd->entity; + if (me->num_pads == 1) + break; + } + + /* + * For using FIMC-IS firmware controlled sensors, ISP subdev + * has to be initialized along with pipeline0 devices. + * So an ISP subdev from a free ISP pipeline is assigned to + * this pipeline. + */ + if (p->subdevs[IDX_SENSOR] && + (p->subdevs[IDX_SENSOR]->grp_id == GRP_ID_FIMC_IS_SENSOR)) { + struct fimc_pipeline_isp *p_isp; + + list_for_each_entry(p_isp, p->isp_pipelines, list) { + if (!p_isp->in_use) { + p->subdevs[IDX_FIMC_IS] = + p_isp->subdevs[IDX_ISP]; + p_isp->in_use = true; + break; + } + } + } +} + +/** + * __subdev_set_power - change power state of a single subdev + * @sd: subdevice to change power state for + * @on: 1 to enable power or 0 to disable + * + * Return result of s_power subdev operation or -ENXIO if sd argument + * is NULL. Return 0 if the subdevice does not implement s_power. + */ +static int __subdev_set_power(struct v4l2_subdev *sd, int on) +{ + int *use_count; + int ret; + + if (sd == NULL) + return -ENXIO; + + use_count = &sd->entity.use_count; + if (on && (*use_count)++ > 0) + return 0; + else if (!on && (*use_count == 0 || --(*use_count) > 0)) + return 0; + ret = v4l2_subdev_call(sd, core, s_power, on); + + return ret != -ENOIOCTLCMD ? ret : 0; +} + +/** + * fimc_pipeline_s_power - change power state of all pipeline subdevs + * @fimc: fimc device terminating the pipeline + * @state: true to power on, false to power off + * + * Needs to be called with the graph mutex held. + */ +static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool state) +{ + unsigned int i; + int ret; + struct fimc_is_isp *isp_dev; + + if (p->subdevs[IDX_SENSOR] == NULL) + return -ENXIO; + + /* + * If sensor is firmware controlled IS-sensor, + * set sensor sd to isp context. + */ + if (p->subdevs[IDX_FIMC_IS]) { + isp_dev = v4l2_get_subdevdata(p->subdevs[IDX_FIMC_IS]); + isp_dev->sensor_sd = p->subdevs[IDX_SENSOR]; + } + + for (i = 0; i < IDX_MAX; i++) { + unsigned int idx = state ? i : (IDX_MAX - 1) - i; + + ret = __subdev_set_power(p->subdevs[idx], state); + if (ret < 0 && ret != -ENXIO) + return ret; + } + + return 0; +} + +/** + * __fimc_pipeline_open - update the pipeline information, enable power + * of all pipeline subdevs and the sensor clock + * @me: media entity to start graph walk with + * @prepare: true to walk the current pipeline and acquire all subdevs + * + * Called with the graph mutex held. + */ +static int __fimc_pipeline_open(struct exynos_media_pipeline *ep, + struct media_entity *me, bool prepare) +{ + struct fimc_pipeline *p = to_fimc_pipeline(ep); + struct v4l2_subdev *sd; + struct fimc_source_info *si; + struct fimc_md *fmd; + int ret; + + if (WARN_ON(p == NULL || me == NULL)) + return -EINVAL; + + if (prepare) + fimc_pipeline_prepare(p, me); + + sd = p->subdevs[IDX_SENSOR]; + if (sd == NULL) + return -EINVAL; + + si = v4l2_get_subdev_hostdata(sd); + fmd = entity_to_fimc_mdev(&sd->entity); + ret = clk_prepare_enable(fmd->clk_bayer); + if (ret < 0) + return ret; + + ret = fimc_pipeline_s_power(p, 1); + if (!ret) + return 0; + + return ret; +} + +/** + * __fimc_pipeline_close - disable the sensor clock and pipeline power + * @fimc: fimc device terminating the pipeline + * + * Disable power of all subdevs and turn the external sensor clock off. + */ +static int __fimc_pipeline_close(struct exynos_media_pipeline *ep) +{ + struct fimc_pipeline *p = to_fimc_pipeline(ep); + struct v4l2_subdev *sd = p ? p->subdevs[IDX_SENSOR] : NULL; + struct fimc_source_info *si; + struct fimc_md *fmd; + int ret = 0; + + if (WARN_ON(sd == NULL)) + return -EINVAL; + + if (p->subdevs[IDX_SENSOR]) + ret = fimc_pipeline_s_power(p, 0); + + si = v4l2_get_subdev_hostdata(sd); + fmd = entity_to_fimc_mdev(&sd->entity); + clk_disable_unprepare(fmd->clk_bayer); + + if (p->subdevs[IDX_SENSOR]->grp_id == GRP_ID_FIMC_IS_SENSOR) { + struct fimc_pipeline_isp *p_isp; + + list_for_each_entry(p_isp, p->isp_pipelines, list) { + if (p_isp->subdevs[IDX_ISP] == + p->subdevs[IDX_FIMC_IS]) { + p->subdevs[IDX_FIMC_IS] = NULL; + p_isp->in_use = false; + break; + } + } + } + return ret == -ENXIO ? 0 : ret; +} + +/** + * __fimc_pipeline_s_stream - call s_stream() on pipeline subdevs + * @pipeline: video pipeline structure + * @on: passed as the s_stream() callback argument + */ +static int __fimc_pipeline_s_stream(struct exynos_media_pipeline *ep, bool on) +{ + struct fimc_pipeline *p = to_fimc_pipeline(ep); + int i, ret; + + if (p->subdevs[IDX_SENSOR] == NULL) + return -ENODEV; + + for (i = 0; i < IDX_MAX; i++) { + unsigned int idx = on ? i : (IDX_MAX - 1) - i; + + ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on); + + if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) + return ret; + } + return 0; +} + +/* Media pipeline operations for the FIMC/FIMC-LITE video device driver */ +static const struct exynos_media_pipeline_ops exynos5_pipeline0_ops = { + .open = __fimc_pipeline_open, + .close = __fimc_pipeline_close, + .set_stream = __fimc_pipeline_s_stream, +}; + +static struct exynos_media_pipeline *fimc_md_pipeline_create( + struct fimc_md *fmd) +{ + struct fimc_pipeline *p; + + p = kzalloc(sizeof(*p), GFP_KERNEL); + if (!p) + return NULL; + + list_add_tail(&p->list, &fmd->pipelines); + + p->isp_pipelines = &fmd->isp_pipelines; + p->ep.ops = &exynos5_pipeline0_ops; + return &p->ep; +} + +static struct exynos_media_pipeline *fimc_md_isp_pipeline_create( + struct fimc_md *fmd) +{ + struct fimc_pipeline_isp *p; + + p = kzalloc(sizeof(*p), GFP_KERNEL); + if (!p) + return NULL; + + list_add_tail(&p->list, &fmd->isp_pipelines); + + p->in_use = false; + return &p->ep; +} + +static void fimc_md_pipelines_free(struct fimc_md *fmd) +{ + while (!list_empty(&fmd->pipelines)) { + struct fimc_pipeline *p; + + p = list_entry(fmd->pipelines.next, typeof(*p), list); + list_del(&p->list); + kfree(p); + } + while (!list_empty(&fmd->isp_pipelines)) { + struct fimc_pipeline_isp *p; + + p = list_entry(fmd->isp_pipelines.next, typeof(*p), list); + list_del(&p->list); + kfree(p); + } +} + +/* Parse port node and register as a sub-device any sensor specified there. */ +static int fimc_md_parse_port_node(struct fimc_md *fmd, + struct device_node *port, + unsigned int index) +{ + struct device_node *rem, *ep, *np; + struct fimc_source_info *pd; + struct v4l2_of_endpoint endpoint; + + pd = &fmd->sensor[index].pdata; + + /* Assume here a port node can have only one endpoint node. */ + ep = of_get_next_child(port, NULL); + if (!ep) + return 0; + + v4l2_of_parse_endpoint(ep, &endpoint); + if (WARN_ON(endpoint.port == 0) || index >= FIMC_MAX_SENSORS) + return -EINVAL; + + pd->mux_id = (endpoint.port - 1) & 0x1; + + rem = v4l2_of_get_remote_port_parent(ep); + of_node_put(ep); + if (rem == NULL) { + v4l2_info(&fmd->v4l2_dev, "Remote device at %s not found\n", + ep->full_name); + return 0; + } + + if (fimc_input_is_parallel(endpoint.port)) { + if (endpoint.bus_type == V4L2_MBUS_PARALLEL) + pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_601; + else + pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_656; + pd->flags = endpoint.bus.parallel.flags; + } else if (fimc_input_is_mipi_csi(endpoint.port)) { + /* + * MIPI CSI-2: only input mux selection and + * the sensor's clock frequency is needed. + */ + pd->sensor_bus_type = FIMC_BUS_TYPE_MIPI_CSI2; + } else { + v4l2_err(&fmd->v4l2_dev, "Wrong port id (%u) at node %s\n", + endpoint.port, rem->full_name); + } + + np = of_get_parent(rem); + + if (np && !of_node_cmp(np->name, "i2c-isp")) + pd->fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK; + else + pd->fimc_bus_type = pd->sensor_bus_type; + + if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor))) + return -EINVAL; + + fmd->sensor[index].asd.match_type = V4L2_ASYNC_MATCH_OF; + fmd->sensor[index].asd.match.of.node = rem; + fmd->async_subdevs[index] = &fmd->sensor[index].asd; + + fmd->num_sensors++; + + of_node_put(rem); + return 0; +} + +/* Register all SoC external sub-devices */ +static int fimc_md_of_sensors_register(struct fimc_md *fmd, + struct device_node *np) +{ + struct device_node *parent = fmd->pdev->dev.of_node; + struct device_node *node, *ports; + int index; + int ret; + + /* Attach sensors linked to MIPI CSI-2 receivers */ + for (index = 0; index < FIMC_NUM_MIPI_CSIS; index++) { + struct device_node *port; + + node = of_parse_phandle(parent, "samsung,csis", index); + if (!node || !of_device_is_available(node)) + continue; + /* The csis node can have only port subnode. */ + port = of_get_next_child(node, NULL); + if (!port) + continue; + + ret = fimc_md_parse_port_node(fmd, port, index); + if (ret < 0) + return ret; + } + + /* Attach sensors listed in the parallel-ports node */ + ports = of_get_child_by_name(parent, "parallel-ports"); + if (!ports) + return 0; + + for_each_child_of_node(ports, node) { + ret = fimc_md_parse_port_node(fmd, node, index); + if (ret < 0) + break; + index++; + } + + return 0; +} + +static int __of_get_csis_id(struct device_node *np) +{ + u32 reg = 0; + + np = of_get_child_by_name(np, "port"); + if (!np) + return -EINVAL; + of_property_read_u32(np, "reg", ®); + return reg - FIMC_INPUT_MIPI_CSI2_0; +} + +/* + * MIPI-CSIS, FIMC-IS and FIMC-LITE platform devices registration. + */ + +static int register_fimc_lite_entity(struct fimc_md *fmd, + struct fimc_lite *fimc_lite) +{ + struct v4l2_subdev *sd; + struct exynos_media_pipeline *ep; + int ret; + + if (WARN_ON(fimc_lite->index >= FIMC_LITE_MAX_DEVS || + fmd->fimc_lite[fimc_lite->index])) + return -EBUSY; + + sd = &fimc_lite->subdev; + sd->grp_id = GRP_ID_FLITE; + + ep = fimc_md_pipeline_create(fmd); + if (!ep) + return -ENOMEM; + + v4l2_set_subdev_hostdata(sd, ep); + + ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); + if (!ret) + fmd->fimc_lite[fimc_lite->index] = fimc_lite; + else + v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n", + fimc_lite->index); + return ret; +} + +static int register_csis_entity(struct fimc_md *fmd, + struct platform_device *pdev, + struct v4l2_subdev *sd) +{ + struct device_node *node = pdev->dev.of_node; + int id, ret; + + id = node ? __of_get_csis_id(node) : max(0, pdev->id); + + if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES)) + return -ENOENT; + + if (WARN_ON(fmd->csis[id].sd)) + return -EBUSY; + + sd->grp_id = GRP_ID_CSIS; + ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); + if (!ret) + fmd->csis[id].sd = sd; + else + v4l2_err(&fmd->v4l2_dev, + "Failed to register MIPI-CSIS.%d (%d)\n", id, ret); + return ret; +} + +static int register_fimc_is_entity(struct fimc_md *fmd, + struct fimc_is *is) +{ + struct v4l2_subdev *isp, *scc, *scp; + struct exynos_media_pipeline *ep; + struct fimc_pipeline_isp *p; + struct video_device *vdev; + int ret, i; + + for (i = 0; i < is->drvdata->num_instances; i++) { + isp = fimc_is_isp_get_sd(is, i); + scc = fimc_is_scc_get_sd(is, i); + scp = fimc_is_scp_get_sd(is, i); + isp->grp_id = GRP_ID_FIMC_IS; + scc->grp_id = GRP_ID_FIMC_IS; + scp->grp_id = GRP_ID_FIMC_IS; + + ep = fimc_md_isp_pipeline_create(fmd); + if (!ep) + return -ENOMEM; + + v4l2_set_subdev_hostdata(isp, ep); + v4l2_set_subdev_hostdata(scc, ep); + v4l2_set_subdev_hostdata(scp, ep); + + ret = v4l2_device_register_subdev(&fmd->v4l2_dev, isp); + if (ret) + v4l2_err(&fmd->v4l2_dev, + "Failed to register ISP subdev\n"); + + ret = v4l2_device_register_subdev(&fmd->v4l2_dev, scc); + if (ret) + v4l2_err(&fmd->v4l2_dev, + "Failed to register SCC subdev\n"); + + ret = v4l2_device_register_subdev(&fmd->v4l2_dev, scp); + if (ret) + v4l2_err(&fmd->v4l2_dev, + "Failed to register SCP subdev\n"); + + p = to_fimc_isp_pipeline(ep); + p->subdevs[IDX_ISP] = isp; + p->subdevs[IDX_SCC] = scc; + p->subdevs[IDX_SCP] = scp; + + /* Create default links */ + /* vdev -> ISP */ + vdev = fimc_is_isp_get_vfd(is, i); + ret = media_entity_create_link(&isp->entity, + ISP_SD_PAD_SINK_DMA, + &vdev->entity, 0, + MEDIA_LNK_FL_IMMUTABLE | + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + + /* ISP -> SCC */ + ret = media_entity_create_link(&isp->entity, + ISP_SD_PAD_SRC, + &scc->entity, SCALER_SD_PAD_SINK, + MEDIA_LNK_FL_IMMUTABLE | + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + + /* SCC -> SCP */ + ret = media_entity_create_link(&scc->entity, + SCALER_SD_PAD_SRC_FIFO, + &scp->entity, SCALER_SD_PAD_SINK, + MEDIA_LNK_FL_IMMUTABLE | + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + + /* SCC -> vdev */ + vdev = fimc_is_scc_get_vfd(is, i); + ret = media_entity_create_link(&scc->entity, + SCALER_SD_PAD_SRC_DMA, + &vdev->entity, 0, + MEDIA_LNK_FL_IMMUTABLE | + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + + /* SCP -> vdev */ + vdev = fimc_is_scp_get_vfd(is, i); + ret = media_entity_create_link(&scp->entity, + SCALER_SD_PAD_SRC_DMA, + &vdev->entity, 0, + MEDIA_LNK_FL_IMMUTABLE | + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + } + fmd->is = is; + + return ret; +} + +static int fimc_md_register_platform_entity(struct fimc_md *fmd, + struct platform_device *pdev, + int plat_entity) +{ + struct device *dev = &pdev->dev; + int ret = -EPROBE_DEFER; + void *drvdata; + + /* Lock to ensure dev->driver won't change. */ + device_lock(dev); + + if (!dev->driver || !try_module_get(dev->driver->owner)) + goto dev_unlock; + + drvdata = dev_get_drvdata(dev); + /* Some subdev didn't probe succesfully id drvdata is NULL */ + if (drvdata) { + switch (plat_entity) { + case IDX_FLITE: + ret = register_fimc_lite_entity(fmd, drvdata); + break; + case IDX_CSIS: + ret = register_csis_entity(fmd, pdev, drvdata); + break; + case IDX_FIMC_IS: + ret = register_fimc_is_entity(fmd, drvdata); + break; + default: + ret = -ENODEV; + } + } + + module_put(dev->driver->owner); +dev_unlock: + device_unlock(dev); + if (ret == -EPROBE_DEFER) + dev_info(&fmd->pdev->dev, "deferring %s device registration\n", + dev_name(dev)); + else if (ret < 0) + dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n", + dev_name(dev), ret); + return ret; +} + +/* Register FIMC-LITE, CSIS and FIMC-IS media entities */ +static int fimc_md_register_of_platform_entities(struct fimc_md *fmd, + struct device_node *camera) +{ + struct device_node *node; + struct platform_device *pdev; + int ret = 0; + int i; + + /* Register MIPI-CSIS entities */ + for (i = 0; i < FIMC_NUM_MIPI_CSIS; i++) { + + node = of_parse_phandle(camera, "samsung,csis", i); + if (!node || !of_device_is_available(node)) + continue; + + pdev = of_find_device_by_node(node); + if (!pdev) + continue; + + ret = fimc_md_register_platform_entity(fmd, pdev, IDX_CSIS); + put_device(&pdev->dev); + if (ret < 0) + break; + } + + /* Register FIMC-LITE entities */ + for (i = 0; i < FIMC_NUM_FIMC_LITE; i++) { + + node = of_parse_phandle(camera, "samsung,fimc-lite", i); + if (!node || !of_device_is_available(node)) + continue; + + pdev = of_find_device_by_node(node); + if (!pdev) + continue; + + ret = fimc_md_register_platform_entity(fmd, pdev, IDX_FLITE); + put_device(&pdev->dev); + if (ret < 0) + break; + } + + /* Register fimc-is entity */ + node = of_parse_phandle(camera, "samsung,fimc-is", 0); + if (!node || !of_device_is_available(node)) + goto exit; + + pdev = of_find_device_by_node(node); + if (!pdev) + goto exit; + + ret = fimc_md_register_platform_entity(fmd, pdev, IDX_FIMC_IS); + + put_device(&pdev->dev); +exit: + return ret; +} + +static void fimc_md_unregister_entities(struct fimc_md *fmd) +{ + int i; + struct fimc_is *is; + + for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { + if (fmd->fimc_lite[i] == NULL) + continue; + v4l2_device_unregister_subdev(&fmd->fimc_lite[i]->subdev); + fmd->fimc_lite[i] = NULL; + } + for (i = 0; i < CSIS_MAX_ENTITIES; i++) { + if (fmd->csis[i].sd == NULL) + continue; + v4l2_device_unregister_subdev(fmd->csis[i].sd); + module_put(fmd->csis[i].sd->owner); + fmd->csis[i].sd = NULL; + } + for (i = 0; i < fmd->num_sensors; i++) + fmd->sensor[i].subdev = NULL; + + if (!fmd->is) + return; + /* Unregistering FIMC-IS entities */ + is = fmd->is; + for (i = 0; i < is->drvdata->num_instances; i++) { + struct v4l2_subdev *isp, *scc, *scp; + + isp = fimc_is_isp_get_sd(is, i); + scc = fimc_is_scc_get_sd(is, i); + scp = fimc_is_scp_get_sd(is, i); + v4l2_device_unregister_subdev(isp); + v4l2_device_unregister_subdev(scc); + v4l2_device_unregister_subdev(scp); + } + + v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n"); +} + +/** + * __fimc_md_create_fimc_links - create links to all FIMC entities + * @fmd: fimc media device + * @source: the source entity to create links to all fimc entities from + * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null + * @pad: the source entity pad index + * @link_mask: bitmask of the fimc devices for which link should be enabled + */ +static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd, + struct media_entity *source, + struct v4l2_subdev *sensor, + int pad, int link_mask) +{ + struct fimc_source_info *si = NULL; + struct media_entity *sink; + unsigned int flags = 0; + int i, ret = 0; + + if (sensor) { + si = v4l2_get_subdev_hostdata(sensor); + /* Skip direct FIMC links in the logical FIMC-IS sensor path */ + if (si && si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK) + ret = 1; + } + + for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { + if (!fmd->fimc_lite[i]) + continue; + + flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0; + + sink = &fmd->fimc_lite[i]->subdev.entity; + ret = media_entity_create_link(source, pad, sink, + FLITE_SD_PAD_SINK, flags); + if (ret) + return ret; + + /* Notify FIMC-LITE subdev entity */ + ret = media_entity_call(sink, link_setup, &sink->pads[0], + &source->pads[pad], flags); + if (ret) + break; + + v4l2_info(&fmd->v4l2_dev, "created link [%s] -> [%s]\n", + source->name, sink->name); + } + return 0; +} + +/* Create links from FIMC-LITE source pads to other entities */ +static int __fimc_md_create_flite_source_links(struct fimc_md *fmd) +{ + struct media_entity *source, *sink; + int i, ret = 0; + + for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { + struct fimc_lite *fimc = fmd->fimc_lite[i]; + + if (fimc == NULL) + continue; + + source = &fimc->subdev.entity; + sink = &fimc->ve.vdev.entity; + /* FIMC-LITE's subdev and video node */ + ret = media_entity_create_link(source, FLITE_SD_PAD_SOURCE_DMA, + sink, 0, + MEDIA_LNK_FL_IMMUTABLE | + MEDIA_LNK_FL_ENABLED); + if (ret) + break; + } + + return ret; +} + +/** + * fimc_md_create_links - create default links between registered entities + * + * Parallel interface sensor entities are connected directly to FIMC capture + * entities. The sensors using MIPI CSIS bus are connected through immutable + * link with CSI receiver entity specified by mux_id. Any registered CSIS + * entity has a link to each registered FIMC capture entity. Enabled links + * are created by default between each subsequent registered sensor and + * subsequent FIMC capture entity. The number of default active links is + * determined by the number of available sensors or FIMC entities, + * whichever is less. + */ +static int fimc_md_create_links(struct fimc_md *fmd) +{ + struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL }; + struct v4l2_subdev *sensor, *csis; + struct fimc_source_info *pdata; + struct media_entity *source; + int i, pad, fimc_id = 0, ret = 0; + u32 flags, link_mask = 0; + + for (i = 0; i < fmd->num_sensors; i++) { + if (fmd->sensor[i].subdev == NULL) + continue; + + sensor = fmd->sensor[i].subdev; + pdata = v4l2_get_subdev_hostdata(sensor); + if (!pdata) + continue; + + source = NULL; + + switch (pdata->sensor_bus_type) { + case FIMC_BUS_TYPE_MIPI_CSI2: + if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES, + "Wrong CSI channel id: %d\n", pdata->mux_id)) + return -EINVAL; + + csis = fmd->csis[pdata->mux_id].sd; + if (WARN(csis == NULL, + "MIPI-CSI interface specified " + "but s5p-csis module is not loaded!\n")) + return -EINVAL; + + pad = sensor->entity.num_pads - 1; + ret = media_entity_create_link(&sensor->entity, pad, + &csis->entity, CSIS_PAD_SINK, + MEDIA_LNK_FL_IMMUTABLE | + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + + v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]\n", + sensor->entity.name, csis->entity.name); + + source = NULL; + csi_sensors[pdata->mux_id] = sensor; + break; + + case FIMC_BUS_TYPE_ITU_601...FIMC_BUS_TYPE_ITU_656: + source = &sensor->entity; + pad = 0; + break; + + default: + v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n", + pdata->sensor_bus_type); + return -EINVAL; + } + if (source == NULL) + continue; + + link_mask = 1 << fimc_id++; + ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor, + pad, link_mask); + } + + for (i = 0; i < CSIS_MAX_ENTITIES; i++) { + if (fmd->csis[i].sd == NULL) + continue; + + source = &fmd->csis[i].sd->entity; + pad = CSIS_PAD_SOURCE; + sensor = csi_sensors[i]; + + link_mask = 1 << fimc_id++; + ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor, + pad, link_mask); + } + + /* + * Create immutable links between each FIMC-LITE's subdev + * and video node + */ + flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED; + + ret = __fimc_md_create_flite_source_links(fmd); + if (ret < 0) + return ret; + + return 0; +} + +static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable) +{ + struct exynos_video_entity *ve; + struct fimc_pipeline *p; + struct video_device *vdev; + int ret; + + vdev = media_entity_to_video_device(entity); + if (vdev->entity.use_count == 0) + return 0; + + ve = vdev_to_exynos_video_entity(vdev); + p = to_fimc_pipeline(ve->pipe); + /* + * Nothing to do if we are disabling the pipeline, some link + * has been disconnected and p->subdevs array is cleared now. + */ + if (!enable && p->subdevs[IDX_SENSOR] == NULL) + return 0; + + if (enable) + ret = __fimc_pipeline_open(ve->pipe, entity, true); + else + ret = __fimc_pipeline_close(ve->pipe); + + if (ret == 0 && !enable) + memset(p->subdevs, 0, sizeof(p->subdevs)); + + return ret; +} + +/* Locking: called with entity->parent->graph_mutex mutex held. */ +static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable) +{ + struct media_entity *entity_err = entity; + struct media_entity_graph graph; + int ret; + + /* + * Walk current graph and call the pipeline open/close routine for each + * opened video node that belongs to the graph of entities connected + * through active links. This is needed as we cannot power on/off the + * subdevs in random order. + */ + media_entity_graph_walk_start(&graph, entity); + + while ((entity = media_entity_graph_walk_next(&graph))) { + if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE) + continue; + + ret = __fimc_md_modify_pipeline(entity, enable); + + if (ret < 0) + goto err; + } + + return 0; + err: + media_entity_graph_walk_start(&graph, entity_err); + + while ((entity_err = media_entity_graph_walk_next(&graph))) { + if (media_entity_type(entity_err) != MEDIA_ENT_T_DEVNODE) + continue; + + __fimc_md_modify_pipeline(entity_err, !enable); + + if (entity_err == entity) + break; + } + + return ret; +} + +static int fimc_md_link_notify(struct media_link *link, unsigned int flags, + unsigned int notification) +{ + struct media_entity *sink = link->sink->entity; + int ret = 0; + + /* Before link disconnection */ + if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) { + if (!(flags & MEDIA_LNK_FL_ENABLED)) + ret = __fimc_md_modify_pipelines(sink, false); + else + ; /* TODO: Link state change validation */ + /* After link activation */ + } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH && + (link->flags & MEDIA_LNK_FL_ENABLED)) { + ret = __fimc_md_modify_pipelines(sink, true); + } + + return ret ? -EPIPE : 0; +} + +static int subdev_notifier_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct fimc_md *fmd = notifier_to_fimc_md(notifier); + struct fimc_sensor_info *si = NULL; + int i; + + /* Find platform data for this sensor subdev */ + for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++) { + if (fmd->sensor[i].asd.match.of.node == subdev->dev->of_node) + si = &fmd->sensor[i]; + } + + if (si == NULL) + return -EINVAL; + + v4l2_set_subdev_hostdata(subdev, &si->pdata); + + if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK) + subdev->grp_id = GRP_ID_FIMC_IS_SENSOR; + else + subdev->grp_id = GRP_ID_SENSOR; + + si->subdev = subdev; + + v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n", + subdev->name, fmd->num_sensors); + + fmd->num_sensors++; + + return 0; +} + +static int subdev_notifier_complete(struct v4l2_async_notifier *notifier) +{ + struct fimc_md *fmd = notifier_to_fimc_md(notifier); + int ret; + + mutex_lock(&fmd->media_dev.graph_mutex); + + ret = fimc_md_create_links(fmd); + if (ret < 0) + goto unlock; + + ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev); +unlock: + mutex_unlock(&fmd->media_dev.graph_mutex); + return ret; +} + +static int fimc_md_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct v4l2_device *v4l2_dev; + struct fimc_md *fmd; + int ret; + + fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL); + if (!fmd) + return -ENOMEM; + + spin_lock_init(&fmd->slock); + fmd->pdev = pdev; + INIT_LIST_HEAD(&fmd->pipelines); + INIT_LIST_HEAD(&fmd->isp_pipelines); + + strlcpy(fmd->media_dev.model, "SAMSUNG EXYNOS5 IS", + sizeof(fmd->media_dev.model)); + fmd->media_dev.link_notify = fimc_md_link_notify; + fmd->media_dev.dev = dev; + + v4l2_dev = &fmd->v4l2_dev; + v4l2_dev->mdev = &fmd->media_dev; + strlcpy(v4l2_dev->name, "exynos5-fimc-md", sizeof(v4l2_dev->name)); + + ret = v4l2_device_register(dev, &fmd->v4l2_dev); + if (ret < 0) { + v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret); + return ret; + } + + ret = media_device_register(&fmd->media_dev); + if (ret < 0) { + v4l2_err(v4l2_dev, "Failed to register media dev: %d\n", ret); + goto err_md; + } + + fmd->clk_bayer = clk_get(dev, BAYER_CLK_NAME); + if (IS_ERR(fmd->clk_bayer)) { + v4l2_err(v4l2_dev, "Failed to get clk: %s\n", BAYER_CLK_NAME); + goto err_md; + } + + platform_set_drvdata(pdev, fmd); + + /* Protect the media graph while we're registering entities */ + mutex_lock(&fmd->media_dev.graph_mutex); + + ret = fimc_md_register_of_platform_entities(fmd, dev->of_node); + if (ret) + goto err_unlock; + + fmd->num_sensors = 0; + ret = fimc_md_of_sensors_register(fmd, dev->of_node); + if (ret) + goto err_unlock; + + mutex_unlock(&fmd->media_dev.graph_mutex); + + fmd->subdev_notifier.subdevs = fmd->async_subdevs; + fmd->subdev_notifier.num_subdevs = fmd->num_sensors; + fmd->subdev_notifier.bound = subdev_notifier_bound; + fmd->subdev_notifier.complete = subdev_notifier_complete; + fmd->num_sensors = 0; + + ret = v4l2_async_notifier_register(&fmd->v4l2_dev, + &fmd->subdev_notifier); + if (ret) + goto err_clk; + + return 0; + +err_unlock: + mutex_unlock(&fmd->media_dev.graph_mutex); +err_clk: + clk_put(fmd->clk_bayer); + fimc_md_unregister_entities(fmd); + media_device_unregister(&fmd->media_dev); +err_md: + v4l2_device_unregister(&fmd->v4l2_dev); + return ret; +} + +static int fimc_md_remove(struct platform_device *pdev) +{ + struct fimc_md *fmd = platform_get_drvdata(pdev); + + v4l2_async_notifier_unregister(&fmd->subdev_notifier); + + fimc_md_unregister_entities(fmd); + fimc_md_pipelines_free(fmd); + media_device_unregister(&fmd->media_dev); + clk_put(fmd->clk_bayer); + + return 0; +} + +static const struct of_device_id fimc_md_of_match[] = { + { .compatible = "samsung,exynos5250-fimc" }, + { }, +}; +MODULE_DEVICE_TABLE(of, fimc_md_of_match); + +static struct platform_driver fimc_md_driver = { + .probe = fimc_md_probe, + .remove = fimc_md_remove, + .driver = { + .of_match_table = fimc_md_of_match, + .name = "exynos5-fimc-md", + .owner = THIS_MODULE, + } +}; + +static int __init fimc_md_init(void) +{ + request_module("s5p-csis"); + return platform_driver_register(&fimc_md_driver); +} + +static void __exit fimc_md_exit(void) +{ + platform_driver_unregister(&fimc_md_driver); +} + +module_init(fimc_md_init); +module_exit(fimc_md_exit); + +MODULE_AUTHOR("Shaik Ameer Basha "); +MODULE_DESCRIPTION("EXYNOS5 camera subsystem media device driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/media/platform/exynos5-is/exynos5-mdev.h b/drivers/media/platform/exynos5-is/exynos5-mdev.h new file mode 100644 index 0000000..44e57a2 --- /dev/null +++ b/drivers/media/platform/exynos5-is/exynos5-mdev.h @@ -0,0 +1,126 @@ +/* + * Copyright (C) 2011 - 2012 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef EXYNOS5_MDEVICE_H_ +#define EXYNOS5_MDEVICE_H_ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "fimc-lite.h" +#include "mipi-csis.h" + +#define FIMC_MAX_SENSORS 4 +#define FIMC_NUM_MIPI_CSIS 2 +#define FIMC_NUM_FIMC_LITE 3 + +enum fimc_subdev_index { + IDX_SENSOR, + IDX_CSIS, + IDX_FLITE, + IDX_FIMC_IS, + IDX_MAX, +}; + +enum fimc_isp_subdev_index { + IDX_ISP, + IDX_SCC, + IDX_SCP, + IDX_IS_MAX, +}; + +struct fimc_pipeline { + struct exynos_media_pipeline ep; + struct list_head list; + struct media_entity *vdev_entity; + struct v4l2_subdev *subdevs[IDX_MAX]; + struct list_head *isp_pipelines; +}; + +struct fimc_pipeline_isp { + struct exynos_media_pipeline ep; + struct list_head list; + struct v4l2_subdev *subdevs[IDX_IS_MAX]; + bool in_use; +}; + +struct fimc_csis_info { + struct v4l2_subdev *sd; + int id; +}; + +/** + * struct fimc_sensor_info - image data source subdev information + * @pdata: sensor's atrributes passed as media device's platform data + * @asd: asynchronous subdev registration data structure + * @subdev: image sensor v4l2 subdev + * @host: fimc device the sensor is currently linked to + * + * This data structure applies to image sensor and the writeback subdevs. + */ +struct fimc_sensor_info { + struct fimc_source_info pdata; + struct v4l2_async_subdev asd; + struct v4l2_subdev *subdev; + struct fimc_dev *host; +}; + +/** + * struct fimc_md - fimc media device information + * @csis: MIPI CSIS subdevs data + * @sensor: array of registered sensor subdevs + * @num_sensors: actual number of registered sensors + * @clk_bayer: bus clk for external sensors + * @fimc_lite: array of registered fimc-lite devices + * @is: fimc-is data structure + * @media_dev: top level media device + * @v4l2_dev: top level v4l2_device holding up the subdevs + * @pdev: platform device this media device is hooked up into + * @slock: spinlock protecting @sensor array + * @pipelines: list holding pipeline0 (sensor-mipi-flite) instances + * @isp_pipelines: list holding pipeline1 (isp-scc-scp) instances + */ +struct fimc_md { + struct fimc_csis_info csis[CSIS_MAX_ENTITIES]; + struct fimc_sensor_info sensor[FIMC_MAX_SENSORS]; + int num_sensors; + struct clk *clk_bayer; + struct fimc_lite *fimc_lite[FIMC_LITE_MAX_DEVS]; + struct fimc_is *is; + struct media_device media_dev; + struct v4l2_device v4l2_dev; + struct platform_device *pdev; + struct v4l2_async_notifier subdev_notifier; + struct v4l2_async_subdev *async_subdevs[FIMC_MAX_SENSORS]; + + spinlock_t slock; + struct list_head pipelines; + struct list_head isp_pipelines; +}; + +#define to_fimc_pipeline(_ep) container_of(_ep, struct fimc_pipeline, ep) +#define to_fimc_isp_pipeline(_ep) \ + container_of(_ep, struct fimc_pipeline_isp, ep) + +static inline struct fimc_md *entity_to_fimc_mdev(struct media_entity *me) +{ + return me->parent == NULL ? NULL : + container_of(me->parent, struct fimc_md, media_dev); +} + +static inline struct fimc_md *notifier_to_fimc_md(struct v4l2_async_notifier *n) +{ + return container_of(n, struct fimc_md, subdev_notifier); +} +#endif