forked from Minki/linux
97d66c4727
Make sure when fimc and fimc-lite capture video node is registered it has valid pipeline_ops assigned to it. Otherwise when a video node is opened right after is was registered there, might be an attempt to use ops that are just being assigned, after function v4l2_device_register_subdev() returns. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1050 lines
26 KiB
C
1050 lines
26 KiB
C
/*
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* S5P/EXYNOS4 SoC series camera host interface media device driver
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*
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* Copyright (C) 2011 Samsung Electronics Co., Ltd.
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* Contact: Sylwester Nawrocki, <s.nawrocki@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation, either version 2 of the License,
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* or (at your option) any later version.
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*/
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#include <linux/bug.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/i2c.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <media/v4l2-ctrls.h>
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#include <media/media-device.h>
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#include <media/s5p_fimc.h>
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#include "fimc-core.h"
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#include "fimc-lite.h"
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#include "fimc-mdevice.h"
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#include "mipi-csis.h"
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static int __fimc_md_set_camclk(struct fimc_md *fmd,
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struct fimc_sensor_info *s_info,
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bool on);
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/**
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* fimc_pipeline_prepare - update pipeline information with subdevice pointers
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* @fimc: fimc device terminating the pipeline
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*
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* Caller holds the graph mutex.
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*/
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static void fimc_pipeline_prepare(struct fimc_pipeline *p,
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struct media_entity *me)
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{
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struct media_pad *pad = &me->pads[0];
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struct v4l2_subdev *sd;
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int i;
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for (i = 0; i < IDX_MAX; i++)
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p->subdevs[i] = NULL;
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while (1) {
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if (!(pad->flags & MEDIA_PAD_FL_SINK))
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break;
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/* source pad */
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pad = media_entity_remote_source(pad);
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if (pad == NULL ||
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media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
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break;
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sd = media_entity_to_v4l2_subdev(pad->entity);
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switch (sd->grp_id) {
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case SENSOR_GROUP_ID:
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p->subdevs[IDX_SENSOR] = sd;
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break;
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case CSIS_GROUP_ID:
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p->subdevs[IDX_CSIS] = sd;
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break;
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case FLITE_GROUP_ID:
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p->subdevs[IDX_FLITE] = sd;
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break;
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case FIMC_GROUP_ID:
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/* No need to control FIMC subdev through subdev ops */
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break;
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default:
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pr_warn("%s: Unknown subdev grp_id: %#x\n",
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__func__, sd->grp_id);
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}
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/* sink pad */
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pad = &sd->entity.pads[0];
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}
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}
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/**
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* __subdev_set_power - change power state of a single subdev
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* @sd: subdevice to change power state for
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* @on: 1 to enable power or 0 to disable
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*
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* Return result of s_power subdev operation or -ENXIO if sd argument
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* is NULL. Return 0 if the subdevice does not implement s_power.
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*/
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static int __subdev_set_power(struct v4l2_subdev *sd, int on)
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{
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int *use_count;
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int ret;
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if (sd == NULL)
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return -ENXIO;
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use_count = &sd->entity.use_count;
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if (on && (*use_count)++ > 0)
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return 0;
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else if (!on && (*use_count == 0 || --(*use_count) > 0))
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return 0;
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ret = v4l2_subdev_call(sd, core, s_power, on);
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return ret != -ENOIOCTLCMD ? ret : 0;
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}
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/**
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* fimc_pipeline_s_power - change power state of all pipeline subdevs
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* @fimc: fimc device terminating the pipeline
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* @state: true to power on, false to power off
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*
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* Needs to be called with the graph mutex held.
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*/
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static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool state)
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{
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unsigned int i;
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int ret;
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if (p->subdevs[IDX_SENSOR] == NULL)
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return -ENXIO;
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for (i = 0; i < IDX_MAX; i++) {
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unsigned int idx = state ? (IDX_MAX - 1) - i : i;
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ret = __subdev_set_power(p->subdevs[idx], state);
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if (ret < 0 && ret != -ENXIO)
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return ret;
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}
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return 0;
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}
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/**
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* __fimc_pipeline_open - update the pipeline information, enable power
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* of all pipeline subdevs and the sensor clock
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* @me: media entity to start graph walk with
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* @prep: true to acquire sensor (and csis) subdevs
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*
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* This function must be called with the graph mutex held.
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*/
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static int __fimc_pipeline_open(struct fimc_pipeline *p,
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struct media_entity *me, bool prep)
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{
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int ret;
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if (prep)
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fimc_pipeline_prepare(p, me);
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if (p->subdevs[IDX_SENSOR] == NULL)
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return -EINVAL;
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ret = fimc_md_set_camclk(p->subdevs[IDX_SENSOR], true);
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if (ret)
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return ret;
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return fimc_pipeline_s_power(p, 1);
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}
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static int fimc_pipeline_open(struct fimc_pipeline *p,
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struct media_entity *me, bool prep)
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{
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int ret;
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mutex_lock(&me->parent->graph_mutex);
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ret = __fimc_pipeline_open(p, me, prep);
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mutex_unlock(&me->parent->graph_mutex);
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return ret;
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}
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/**
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* __fimc_pipeline_close - disable the sensor clock and pipeline power
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* @fimc: fimc device terminating the pipeline
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*
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* Disable power of all subdevs in the pipeline and turn off the external
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* sensor clock.
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* Called with the graph mutex held.
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*/
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static int __fimc_pipeline_close(struct fimc_pipeline *p)
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{
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int ret = 0;
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if (p->subdevs[IDX_SENSOR]) {
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ret = fimc_pipeline_s_power(p, 0);
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fimc_md_set_camclk(p->subdevs[IDX_SENSOR], false);
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}
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return ret == -ENXIO ? 0 : ret;
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}
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static int fimc_pipeline_close(struct fimc_pipeline *p)
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{
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struct media_entity *me;
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int ret;
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if (!p || !p->subdevs[IDX_SENSOR])
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return -EINVAL;
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me = &p->subdevs[IDX_SENSOR]->entity;
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mutex_lock(&me->parent->graph_mutex);
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ret = __fimc_pipeline_close(p);
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mutex_unlock(&me->parent->graph_mutex);
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return ret;
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}
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/**
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* fimc_pipeline_s_stream - invoke s_stream on pipeline subdevs
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* @pipeline: video pipeline structure
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* @on: passed as the s_stream call argument
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*/
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int fimc_pipeline_s_stream(struct fimc_pipeline *p, bool on)
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{
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int i, ret;
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if (p->subdevs[IDX_SENSOR] == NULL)
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return -ENODEV;
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for (i = 0; i < IDX_MAX; i++) {
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unsigned int idx = on ? (IDX_MAX - 1) - i : i;
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ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on);
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if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
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return ret;
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}
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return 0;
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}
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/* Media pipeline operations for the FIMC/FIMC-LITE video device driver */
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static const struct fimc_pipeline_ops fimc_pipeline_ops = {
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.open = fimc_pipeline_open,
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.close = fimc_pipeline_close,
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.set_stream = fimc_pipeline_s_stream,
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};
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/*
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* Sensor subdevice helper functions
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*/
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static struct v4l2_subdev *fimc_md_register_sensor(struct fimc_md *fmd,
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struct fimc_sensor_info *s_info)
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{
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struct i2c_adapter *adapter;
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struct v4l2_subdev *sd = NULL;
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if (!s_info || !fmd)
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return NULL;
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adapter = i2c_get_adapter(s_info->pdata.i2c_bus_num);
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if (!adapter) {
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v4l2_warn(&fmd->v4l2_dev,
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"Failed to get I2C adapter %d, deferring probe\n",
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s_info->pdata.i2c_bus_num);
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return ERR_PTR(-EPROBE_DEFER);
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}
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sd = v4l2_i2c_new_subdev_board(&fmd->v4l2_dev, adapter,
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s_info->pdata.board_info, NULL);
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if (IS_ERR_OR_NULL(sd)) {
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i2c_put_adapter(adapter);
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v4l2_warn(&fmd->v4l2_dev,
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"Failed to acquire subdev %s, deferring probe\n",
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s_info->pdata.board_info->type);
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return ERR_PTR(-EPROBE_DEFER);
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}
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v4l2_set_subdev_hostdata(sd, s_info);
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sd->grp_id = SENSOR_GROUP_ID;
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v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice %s\n",
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s_info->pdata.board_info->type);
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return sd;
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}
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static void fimc_md_unregister_sensor(struct v4l2_subdev *sd)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct i2c_adapter *adapter;
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if (!client)
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return;
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v4l2_device_unregister_subdev(sd);
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adapter = client->adapter;
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i2c_unregister_device(client);
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if (adapter)
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i2c_put_adapter(adapter);
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}
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static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
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{
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struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data;
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struct fimc_dev *fd = NULL;
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int num_clients, ret, i;
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/*
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* Runtime resume one of the FIMC entities to make sure
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* the sclk_cam clocks are not globally disabled.
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*/
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for (i = 0; !fd && i < ARRAY_SIZE(fmd->fimc); i++)
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if (fmd->fimc[i])
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fd = fmd->fimc[i];
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if (!fd)
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return -ENXIO;
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ret = pm_runtime_get_sync(&fd->pdev->dev);
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if (ret < 0)
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return ret;
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WARN_ON(pdata->num_clients > ARRAY_SIZE(fmd->sensor));
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num_clients = min_t(u32, pdata->num_clients, ARRAY_SIZE(fmd->sensor));
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fmd->num_sensors = num_clients;
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for (i = 0; i < num_clients; i++) {
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struct v4l2_subdev *sd;
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fmd->sensor[i].pdata = pdata->isp_info[i];
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ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], true);
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if (ret)
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break;
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sd = fimc_md_register_sensor(fmd, &fmd->sensor[i]);
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ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], false);
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if (!IS_ERR(sd)) {
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fmd->sensor[i].subdev = sd;
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} else {
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fmd->sensor[i].subdev = NULL;
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ret = PTR_ERR(sd);
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break;
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}
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if (ret)
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break;
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}
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pm_runtime_put(&fd->pdev->dev);
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return ret;
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}
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/*
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* MIPI CSIS and FIMC platform devices registration.
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*/
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static int fimc_register_callback(struct device *dev, void *p)
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{
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struct fimc_dev *fimc = dev_get_drvdata(dev);
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struct v4l2_subdev *sd;
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struct fimc_md *fmd = p;
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int ret;
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if (fimc == NULL || fimc->id >= FIMC_MAX_DEVS)
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return 0;
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sd = &fimc->vid_cap.subdev;
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sd->grp_id = FIMC_GROUP_ID;
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v4l2_set_subdev_hostdata(sd, (void *)&fimc_pipeline_ops);
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ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
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if (ret) {
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v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
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fimc->id, ret);
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return ret;
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}
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fmd->fimc[fimc->id] = fimc;
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return 0;
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}
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static int fimc_lite_register_callback(struct device *dev, void *p)
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{
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struct fimc_lite *fimc = dev_get_drvdata(dev);
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struct fimc_md *fmd = p;
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int ret;
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if (fimc == NULL || fimc->index >= FIMC_LITE_MAX_DEVS)
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return 0;
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fimc->subdev.grp_id = FLITE_GROUP_ID;
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v4l2_set_subdev_hostdata(&fimc->subdev, (void *)&fimc_pipeline_ops);
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ret = v4l2_device_register_subdev(&fmd->v4l2_dev, &fimc->subdev);
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if (ret) {
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v4l2_err(&fmd->v4l2_dev,
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"Failed to register FIMC-LITE.%d (%d)\n",
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fimc->index, ret);
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return ret;
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}
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fmd->fimc_lite[fimc->index] = fimc;
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return 0;
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}
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static int csis_register_callback(struct device *dev, void *p)
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{
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struct v4l2_subdev *sd = dev_get_drvdata(dev);
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struct platform_device *pdev;
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struct fimc_md *fmd = p;
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int id, ret;
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if (!sd)
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return 0;
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pdev = v4l2_get_subdevdata(sd);
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if (!pdev || pdev->id < 0 || pdev->id >= CSIS_MAX_ENTITIES)
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return 0;
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v4l2_info(sd, "csis%d sd: %s\n", pdev->id, sd->name);
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id = pdev->id < 0 ? 0 : pdev->id;
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sd->grp_id = CSIS_GROUP_ID;
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ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
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if (!ret)
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fmd->csis[id].sd = sd;
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else
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v4l2_err(&fmd->v4l2_dev,
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"Failed to register CSIS subdevice: %d\n", ret);
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return ret;
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}
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/**
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* fimc_md_register_platform_entities - register FIMC and CSIS media entities
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*/
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static int fimc_md_register_platform_entities(struct fimc_md *fmd)
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{
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struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data;
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struct device_driver *driver;
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int ret, i;
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driver = driver_find(FIMC_MODULE_NAME, &platform_bus_type);
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if (!driver) {
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v4l2_warn(&fmd->v4l2_dev,
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"%s driver not found, deffering probe\n",
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FIMC_MODULE_NAME);
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return -EPROBE_DEFER;
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}
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ret = driver_for_each_device(driver, NULL, fmd,
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fimc_register_callback);
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if (ret)
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return ret;
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driver = driver_find(FIMC_LITE_DRV_NAME, &platform_bus_type);
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if (driver && try_module_get(driver->owner)) {
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ret = driver_for_each_device(driver, NULL, fmd,
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fimc_lite_register_callback);
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if (ret)
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return ret;
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module_put(driver->owner);
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}
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/*
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* Check if there is any sensor on the MIPI-CSI2 bus and
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* if not skip the s5p-csis module loading.
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*/
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if (pdata == NULL)
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return 0;
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for (i = 0; i < pdata->num_clients; i++) {
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if (pdata->isp_info[i].bus_type == FIMC_MIPI_CSI2) {
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ret = 1;
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break;
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}
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}
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if (!ret)
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return 0;
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driver = driver_find(CSIS_DRIVER_NAME, &platform_bus_type);
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if (!driver || !try_module_get(driver->owner)) {
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v4l2_warn(&fmd->v4l2_dev,
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"%s driver not found, deffering probe\n",
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CSIS_DRIVER_NAME);
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return -EPROBE_DEFER;
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}
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return driver_for_each_device(driver, NULL, fmd,
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csis_register_callback);
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}
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static void fimc_md_unregister_entities(struct fimc_md *fmd)
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{
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int i;
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for (i = 0; i < FIMC_MAX_DEVS; i++) {
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if (fmd->fimc[i] == NULL)
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continue;
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v4l2_device_unregister_subdev(&fmd->fimc[i]->vid_cap.subdev);
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fmd->fimc[i]->pipeline_ops = NULL;
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fmd->fimc[i] = NULL;
|
|
}
|
|
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[i]->pipeline_ops = NULL;
|
|
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++) {
|
|
if (fmd->sensor[i].subdev == NULL)
|
|
continue;
|
|
fimc_md_unregister_sensor(fmd->sensor[i].subdev);
|
|
fmd->sensor[i].subdev = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* __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_sensor_info *s_info;
|
|
struct media_entity *sink;
|
|
unsigned int flags = 0;
|
|
int ret, i;
|
|
|
|
for (i = 0; i < FIMC_MAX_DEVS; i++) {
|
|
if (!fmd->fimc[i])
|
|
continue;
|
|
/*
|
|
* Some FIMC variants are not fitted with camera capture
|
|
* interface. Skip creating a link from sensor for those.
|
|
*/
|
|
if (!fmd->fimc[i]->variant->has_cam_if)
|
|
continue;
|
|
|
|
flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
|
|
|
|
sink = &fmd->fimc[i]->vid_cap.subdev.entity;
|
|
ret = media_entity_create_link(source, pad, sink,
|
|
FIMC_SD_PAD_SINK, flags);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Notify FIMC capture 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] %c> [%s]",
|
|
source->name, flags ? '=' : '-', sink->name);
|
|
|
|
if (flags == 0 || sensor == NULL)
|
|
continue;
|
|
s_info = v4l2_get_subdev_hostdata(sensor);
|
|
if (!WARN_ON(s_info == NULL)) {
|
|
unsigned long irq_flags;
|
|
spin_lock_irqsave(&fmd->slock, irq_flags);
|
|
s_info->host = fmd->fimc[i];
|
|
spin_unlock_irqrestore(&fmd->slock, irq_flags);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
|
|
if (!fmd->fimc_lite[i])
|
|
continue;
|
|
|
|
if (link_mask & (1 << (i + FIMC_MAX_DEVS)))
|
|
flags = MEDIA_LNK_FL_ENABLED;
|
|
else
|
|
flags = 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] %c> [%s]",
|
|
source->name, flags ? '=' : '-', 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;
|
|
unsigned int flags = MEDIA_LNK_FL_ENABLED;
|
|
int i, ret;
|
|
|
|
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->vfd.entity;
|
|
/* FIMC-LITE's subdev and video node */
|
|
ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE,
|
|
sink, 0, flags);
|
|
if (ret)
|
|
break;
|
|
/* TODO: create links to other entities */
|
|
}
|
|
|
|
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[2] = { NULL };
|
|
struct v4l2_subdev *sensor, *csis;
|
|
struct s5p_fimc_isp_info *pdata;
|
|
struct fimc_sensor_info *s_info;
|
|
struct media_entity *source, *sink;
|
|
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;
|
|
s_info = v4l2_get_subdev_hostdata(sensor);
|
|
if (!s_info)
|
|
continue;
|
|
|
|
source = NULL;
|
|
pdata = &s_info->pdata;
|
|
|
|
switch (pdata->bus_type) {
|
|
case FIMC_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;
|
|
|
|
ret = media_entity_create_link(&sensor->entity, 0,
|
|
&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]",
|
|
sensor->entity.name, csis->entity.name);
|
|
|
|
source = NULL;
|
|
csi_sensors[pdata->mux_id] = sensor;
|
|
break;
|
|
|
|
case FIMC_ITU_601...FIMC_ITU_656:
|
|
source = &sensor->entity;
|
|
pad = 0;
|
|
break;
|
|
|
|
default:
|
|
v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
|
|
pdata->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 < ARRAY_SIZE(fmd->csis); 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's subdev and video node */
|
|
flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
|
|
for (i = 0; i < FIMC_MAX_DEVS; i++) {
|
|
if (!fmd->fimc[i])
|
|
continue;
|
|
source = &fmd->fimc[i]->vid_cap.subdev.entity;
|
|
sink = &fmd->fimc[i]->vid_cap.vfd.entity;
|
|
ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE,
|
|
sink, 0, flags);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
return __fimc_md_create_flite_source_links(fmd);
|
|
}
|
|
|
|
/*
|
|
* The peripheral sensor clock management.
|
|
*/
|
|
static int fimc_md_get_clocks(struct fimc_md *fmd)
|
|
{
|
|
char clk_name[32];
|
|
struct clk *clock;
|
|
int i;
|
|
|
|
for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
|
|
snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
|
|
clock = clk_get(NULL, clk_name);
|
|
if (IS_ERR_OR_NULL(clock)) {
|
|
v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s",
|
|
clk_name);
|
|
return -ENXIO;
|
|
}
|
|
fmd->camclk[i].clock = clock;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void fimc_md_put_clocks(struct fimc_md *fmd)
|
|
{
|
|
int i = FIMC_MAX_CAMCLKS;
|
|
|
|
while (--i >= 0) {
|
|
if (IS_ERR_OR_NULL(fmd->camclk[i].clock))
|
|
continue;
|
|
clk_put(fmd->camclk[i].clock);
|
|
fmd->camclk[i].clock = NULL;
|
|
}
|
|
}
|
|
|
|
static int __fimc_md_set_camclk(struct fimc_md *fmd,
|
|
struct fimc_sensor_info *s_info,
|
|
bool on)
|
|
{
|
|
struct s5p_fimc_isp_info *pdata = &s_info->pdata;
|
|
struct fimc_camclk_info *camclk;
|
|
int ret = 0;
|
|
|
|
if (WARN_ON(pdata->clk_id >= FIMC_MAX_CAMCLKS) || fmd == NULL)
|
|
return -EINVAL;
|
|
|
|
camclk = &fmd->camclk[pdata->clk_id];
|
|
|
|
dbg("camclk %d, f: %lu, use_count: %d, on: %d",
|
|
pdata->clk_id, pdata->clk_frequency, camclk->use_count, on);
|
|
|
|
if (on) {
|
|
if (camclk->use_count > 0 &&
|
|
camclk->frequency != pdata->clk_frequency)
|
|
return -EINVAL;
|
|
|
|
if (camclk->use_count++ == 0) {
|
|
clk_set_rate(camclk->clock, pdata->clk_frequency);
|
|
camclk->frequency = pdata->clk_frequency;
|
|
ret = clk_enable(camclk->clock);
|
|
dbg("Enabled camclk %d: f: %lu", pdata->clk_id,
|
|
clk_get_rate(camclk->clock));
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
if (WARN_ON(camclk->use_count == 0))
|
|
return 0;
|
|
|
|
if (--camclk->use_count == 0) {
|
|
clk_disable(camclk->clock);
|
|
dbg("Disabled camclk %d", pdata->clk_id);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* fimc_md_set_camclk - peripheral sensor clock setup
|
|
* @sd: sensor subdev to configure sclk_cam clock for
|
|
* @on: 1 to enable or 0 to disable the clock
|
|
*
|
|
* There are 2 separate clock outputs available in the SoC for external
|
|
* image processors. These clocks are shared between all registered FIMC
|
|
* devices to which sensors can be attached, either directly or through
|
|
* the MIPI CSI receiver. The clock is allowed here to be used by
|
|
* multiple sensors concurrently if they use same frequency.
|
|
* This function should only be called when the graph mutex is held.
|
|
*/
|
|
int fimc_md_set_camclk(struct v4l2_subdev *sd, bool on)
|
|
{
|
|
struct fimc_sensor_info *s_info = v4l2_get_subdev_hostdata(sd);
|
|
struct fimc_md *fmd = entity_to_fimc_mdev(&sd->entity);
|
|
|
|
return __fimc_md_set_camclk(fmd, s_info, on);
|
|
}
|
|
|
|
static int fimc_md_link_notify(struct media_pad *source,
|
|
struct media_pad *sink, u32 flags)
|
|
{
|
|
struct fimc_lite *fimc_lite = NULL;
|
|
struct fimc_dev *fimc = NULL;
|
|
struct fimc_pipeline *pipeline;
|
|
struct v4l2_subdev *sd;
|
|
int ret = 0;
|
|
|
|
if (media_entity_type(sink->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
|
|
return 0;
|
|
|
|
sd = media_entity_to_v4l2_subdev(sink->entity);
|
|
|
|
switch (sd->grp_id) {
|
|
case FLITE_GROUP_ID:
|
|
fimc_lite = v4l2_get_subdevdata(sd);
|
|
pipeline = &fimc_lite->pipeline;
|
|
break;
|
|
case FIMC_GROUP_ID:
|
|
fimc = v4l2_get_subdevdata(sd);
|
|
pipeline = &fimc->pipeline;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
if (!(flags & MEDIA_LNK_FL_ENABLED)) {
|
|
ret = __fimc_pipeline_close(pipeline);
|
|
pipeline->subdevs[IDX_SENSOR] = NULL;
|
|
pipeline->subdevs[IDX_CSIS] = NULL;
|
|
|
|
if (fimc) {
|
|
mutex_lock(&fimc->lock);
|
|
fimc_ctrls_delete(fimc->vid_cap.ctx);
|
|
mutex_unlock(&fimc->lock);
|
|
}
|
|
return ret;
|
|
}
|
|
/*
|
|
* Link activation. Enable power of pipeline elements only if the
|
|
* pipeline is already in use, i.e. its video node is opened.
|
|
* Recreate the controls destroyed during the link deactivation.
|
|
*/
|
|
if (fimc) {
|
|
mutex_lock(&fimc->lock);
|
|
if (fimc->vid_cap.refcnt > 0) {
|
|
ret = __fimc_pipeline_open(pipeline,
|
|
source->entity, true);
|
|
if (!ret)
|
|
ret = fimc_capture_ctrls_create(fimc);
|
|
}
|
|
mutex_unlock(&fimc->lock);
|
|
} else {
|
|
mutex_lock(&fimc_lite->lock);
|
|
if (fimc_lite->ref_count > 0) {
|
|
ret = __fimc_pipeline_open(pipeline,
|
|
source->entity, true);
|
|
}
|
|
mutex_unlock(&fimc_lite->lock);
|
|
}
|
|
return ret ? -EPIPE : ret;
|
|
}
|
|
|
|
static ssize_t fimc_md_sysfs_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct fimc_md *fmd = platform_get_drvdata(pdev);
|
|
|
|
if (fmd->user_subdev_api)
|
|
return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
|
|
|
|
return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
|
|
}
|
|
|
|
static ssize_t fimc_md_sysfs_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct fimc_md *fmd = platform_get_drvdata(pdev);
|
|
bool subdev_api;
|
|
int i;
|
|
|
|
if (!strcmp(buf, "vid-dev\n"))
|
|
subdev_api = false;
|
|
else if (!strcmp(buf, "sub-dev\n"))
|
|
subdev_api = true;
|
|
else
|
|
return count;
|
|
|
|
fmd->user_subdev_api = subdev_api;
|
|
for (i = 0; i < FIMC_MAX_DEVS; i++)
|
|
if (fmd->fimc[i])
|
|
fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
|
|
return count;
|
|
}
|
|
/*
|
|
* This device attribute is to select video pipeline configuration method.
|
|
* There are following valid values:
|
|
* vid-dev - for V4L2 video node API only, subdevice will be configured
|
|
* by the host driver.
|
|
* sub-dev - for media controller API, subdevs must be configured in user
|
|
* space before starting streaming.
|
|
*/
|
|
static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
|
|
fimc_md_sysfs_show, fimc_md_sysfs_store);
|
|
|
|
static int fimc_md_probe(struct platform_device *pdev)
|
|
{
|
|
struct v4l2_device *v4l2_dev;
|
|
struct fimc_md *fmd;
|
|
int ret;
|
|
|
|
fmd = devm_kzalloc(&pdev->dev, sizeof(*fmd), GFP_KERNEL);
|
|
if (!fmd)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&fmd->slock);
|
|
fmd->pdev = pdev;
|
|
|
|
strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
|
|
sizeof(fmd->media_dev.model));
|
|
fmd->media_dev.link_notify = fimc_md_link_notify;
|
|
fmd->media_dev.dev = &pdev->dev;
|
|
|
|
v4l2_dev = &fmd->v4l2_dev;
|
|
v4l2_dev->mdev = &fmd->media_dev;
|
|
v4l2_dev->notify = fimc_sensor_notify;
|
|
snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "%s",
|
|
dev_name(&pdev->dev));
|
|
|
|
ret = v4l2_device_register(&pdev->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 device: %d\n", ret);
|
|
goto err_md;
|
|
}
|
|
ret = fimc_md_get_clocks(fmd);
|
|
if (ret)
|
|
goto err_clk;
|
|
|
|
fmd->user_subdev_api = false;
|
|
|
|
/* Protect the media graph while we're registering entities */
|
|
mutex_lock(&fmd->media_dev.graph_mutex);
|
|
|
|
ret = fimc_md_register_platform_entities(fmd);
|
|
if (ret)
|
|
goto err_unlock;
|
|
|
|
if (pdev->dev.platform_data) {
|
|
ret = fimc_md_register_sensor_entities(fmd);
|
|
if (ret)
|
|
goto err_unlock;
|
|
}
|
|
ret = fimc_md_create_links(fmd);
|
|
if (ret)
|
|
goto err_unlock;
|
|
ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
|
|
if (ret)
|
|
goto err_unlock;
|
|
|
|
ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
|
|
if (ret)
|
|
goto err_unlock;
|
|
|
|
platform_set_drvdata(pdev, fmd);
|
|
mutex_unlock(&fmd->media_dev.graph_mutex);
|
|
return 0;
|
|
|
|
err_unlock:
|
|
mutex_unlock(&fmd->media_dev.graph_mutex);
|
|
err_clk:
|
|
media_device_unregister(&fmd->media_dev);
|
|
fimc_md_put_clocks(fmd);
|
|
fimc_md_unregister_entities(fmd);
|
|
err_md:
|
|
v4l2_device_unregister(&fmd->v4l2_dev);
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit fimc_md_remove(struct platform_device *pdev)
|
|
{
|
|
struct fimc_md *fmd = platform_get_drvdata(pdev);
|
|
|
|
if (!fmd)
|
|
return 0;
|
|
device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
|
|
fimc_md_unregister_entities(fmd);
|
|
media_device_unregister(&fmd->media_dev);
|
|
fimc_md_put_clocks(fmd);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver fimc_md_driver = {
|
|
.probe = fimc_md_probe,
|
|
.remove = __devexit_p(fimc_md_remove),
|
|
.driver = {
|
|
.name = "s5p-fimc-md",
|
|
.owner = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
static int __init fimc_md_init(void)
|
|
{
|
|
int ret;
|
|
|
|
request_module("s5p-csis");
|
|
ret = fimc_register_driver();
|
|
if (ret)
|
|
return ret;
|
|
|
|
return platform_driver_register(&fimc_md_driver);
|
|
}
|
|
|
|
static void __exit fimc_md_exit(void)
|
|
{
|
|
platform_driver_unregister(&fimc_md_driver);
|
|
fimc_unregister_driver();
|
|
}
|
|
|
|
module_init(fimc_md_init);
|
|
module_exit(fimc_md_exit);
|
|
|
|
MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
|
|
MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION("2.0.1");
|