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![Fabio Estevam](/assets/img/avatar_default.png)
When building with W=1 the following warning shows up: drivers/staging/media/imx/imx-media-internal-sd.c:274:49: warning: Using plain integer as NULL pointer Fix this problem by using an empty initializer, which guarantees that all struct members are zero-cleared. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Acked-by: Steve Longerbeam <steve_longerbeam@mentor.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
360 lines
7.6 KiB
C
360 lines
7.6 KiB
C
/*
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* Media driver for Freescale i.MX5/6 SOC
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*
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* Adds the internal subdevices and the media links between them.
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*
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* Copyright (c) 2016 Mentor Graphics Inc.
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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 by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/platform_device.h>
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#include "imx-media.h"
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enum isd_enum {
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isd_csi0 = 0,
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isd_csi1,
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isd_vdic,
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isd_ic_prp,
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isd_ic_prpenc,
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isd_ic_prpvf,
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num_isd,
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};
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static const struct internal_subdev_id {
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enum isd_enum index;
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const char *name;
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u32 grp_id;
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} isd_id[num_isd] = {
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[isd_csi0] = {
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.index = isd_csi0,
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.grp_id = IMX_MEDIA_GRP_ID_CSI0,
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.name = "imx-ipuv3-csi",
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},
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[isd_csi1] = {
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.index = isd_csi1,
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.grp_id = IMX_MEDIA_GRP_ID_CSI1,
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.name = "imx-ipuv3-csi",
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},
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[isd_vdic] = {
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.index = isd_vdic,
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.grp_id = IMX_MEDIA_GRP_ID_VDIC,
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.name = "imx-ipuv3-vdic",
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},
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[isd_ic_prp] = {
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.index = isd_ic_prp,
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.grp_id = IMX_MEDIA_GRP_ID_IC_PRP,
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.name = "imx-ipuv3-ic",
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},
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[isd_ic_prpenc] = {
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.index = isd_ic_prpenc,
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.grp_id = IMX_MEDIA_GRP_ID_IC_PRPENC,
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.name = "imx-ipuv3-ic",
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},
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[isd_ic_prpvf] = {
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.index = isd_ic_prpvf,
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.grp_id = IMX_MEDIA_GRP_ID_IC_PRPVF,
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.name = "imx-ipuv3-ic",
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},
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};
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struct internal_subdev;
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struct internal_link {
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const struct internal_subdev *remote;
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int local_pad;
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int remote_pad;
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};
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/* max pads per internal-sd */
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#define MAX_INTERNAL_PADS 8
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/* max links per internal-sd pad */
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#define MAX_INTERNAL_LINKS 8
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struct internal_pad {
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struct internal_link link[MAX_INTERNAL_LINKS];
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};
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static const struct internal_subdev {
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const struct internal_subdev_id *id;
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struct internal_pad pad[MAX_INTERNAL_PADS];
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} int_subdev[num_isd] = {
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[isd_csi0] = {
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.id = &isd_id[isd_csi0],
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.pad[CSI_SRC_PAD_DIRECT] = {
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.link = {
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{
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.local_pad = CSI_SRC_PAD_DIRECT,
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.remote = &int_subdev[isd_ic_prp],
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.remote_pad = PRP_SINK_PAD,
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}, {
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.local_pad = CSI_SRC_PAD_DIRECT,
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.remote = &int_subdev[isd_vdic],
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.remote_pad = VDIC_SINK_PAD_DIRECT,
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},
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},
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},
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},
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[isd_csi1] = {
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.id = &isd_id[isd_csi1],
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.pad[CSI_SRC_PAD_DIRECT] = {
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.link = {
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{
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.local_pad = CSI_SRC_PAD_DIRECT,
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.remote = &int_subdev[isd_ic_prp],
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.remote_pad = PRP_SINK_PAD,
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}, {
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.local_pad = CSI_SRC_PAD_DIRECT,
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.remote = &int_subdev[isd_vdic],
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.remote_pad = VDIC_SINK_PAD_DIRECT,
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},
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},
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},
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},
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[isd_vdic] = {
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.id = &isd_id[isd_vdic],
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.pad[VDIC_SRC_PAD_DIRECT] = {
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.link = {
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{
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.local_pad = VDIC_SRC_PAD_DIRECT,
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.remote = &int_subdev[isd_ic_prp],
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.remote_pad = PRP_SINK_PAD,
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},
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},
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},
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},
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[isd_ic_prp] = {
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.id = &isd_id[isd_ic_prp],
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.pad[PRP_SRC_PAD_PRPENC] = {
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.link = {
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{
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.local_pad = PRP_SRC_PAD_PRPENC,
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.remote = &int_subdev[isd_ic_prpenc],
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.remote_pad = 0,
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},
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},
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},
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.pad[PRP_SRC_PAD_PRPVF] = {
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.link = {
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{
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.local_pad = PRP_SRC_PAD_PRPVF,
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.remote = &int_subdev[isd_ic_prpvf],
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.remote_pad = 0,
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},
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},
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},
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},
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[isd_ic_prpenc] = {
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.id = &isd_id[isd_ic_prpenc],
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},
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[isd_ic_prpvf] = {
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.id = &isd_id[isd_ic_prpvf],
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},
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};
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/* form a device name given an internal subdev and ipu id */
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static inline void isd_to_devname(char *devname, int sz,
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const struct internal_subdev *isd,
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int ipu_id)
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{
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int pdev_id = ipu_id * num_isd + isd->id->index;
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snprintf(devname, sz, "%s.%d", isd->id->name, pdev_id);
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}
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static const struct internal_subdev *find_intsd_by_grp_id(u32 grp_id)
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{
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enum isd_enum i;
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for (i = 0; i < num_isd; i++) {
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const struct internal_subdev *isd = &int_subdev[i];
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if (isd->id->grp_id == grp_id)
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return isd;
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}
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return NULL;
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}
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static struct v4l2_subdev *find_sink(struct imx_media_dev *imxmd,
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struct v4l2_subdev *src,
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const struct internal_link *link)
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{
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char sink_devname[32];
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int ipu_id;
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/*
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* retrieve IPU id from subdev name, note: can't get this from
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* struct imx_media_internal_sd_platformdata because if src is
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* a CSI, it has different struct ipu_client_platformdata which
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* does not contain IPU id.
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*/
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if (sscanf(src->name, "ipu%d", &ipu_id) != 1)
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return NULL;
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isd_to_devname(sink_devname, sizeof(sink_devname),
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link->remote, ipu_id - 1);
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return imx_media_find_subdev_by_devname(imxmd, sink_devname);
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}
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static int create_ipu_internal_link(struct imx_media_dev *imxmd,
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struct v4l2_subdev *src,
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const struct internal_link *link)
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{
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struct v4l2_subdev *sink;
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int ret;
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sink = find_sink(imxmd, src, link);
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if (!sink)
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return -ENODEV;
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v4l2_info(&imxmd->v4l2_dev, "%s:%d -> %s:%d\n",
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src->name, link->local_pad,
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sink->name, link->remote_pad);
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ret = media_create_pad_link(&src->entity, link->local_pad,
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&sink->entity, link->remote_pad, 0);
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if (ret)
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v4l2_err(&imxmd->v4l2_dev,
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"create_pad_link failed: %d\n", ret);
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return ret;
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}
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int imx_media_create_internal_links(struct imx_media_dev *imxmd,
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struct v4l2_subdev *sd)
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{
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const struct internal_subdev *intsd;
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const struct internal_pad *intpad;
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const struct internal_link *link;
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struct media_pad *pad;
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int i, j, ret;
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intsd = find_intsd_by_grp_id(sd->grp_id);
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if (!intsd)
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return -ENODEV;
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/* create the source->sink links */
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for (i = 0; i < sd->entity.num_pads; i++) {
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intpad = &intsd->pad[i];
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pad = &sd->entity.pads[i];
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if (!(pad->flags & MEDIA_PAD_FL_SOURCE))
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continue;
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for (j = 0; ; j++) {
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link = &intpad->link[j];
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if (!link->remote)
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break;
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ret = create_ipu_internal_link(imxmd, sd, link);
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if (ret)
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return ret;
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}
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}
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return 0;
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}
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/* register an internal subdev as a platform device */
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static int add_internal_subdev(struct imx_media_dev *imxmd,
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const struct internal_subdev *isd,
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int ipu_id)
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{
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struct imx_media_internal_sd_platformdata pdata;
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struct platform_device_info pdevinfo = {};
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struct platform_device *pdev;
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pdata.grp_id = isd->id->grp_id;
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/* the id of IPU this subdev will control */
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pdata.ipu_id = ipu_id;
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/* create subdev name */
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imx_media_grp_id_to_sd_name(pdata.sd_name, sizeof(pdata.sd_name),
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pdata.grp_id, ipu_id);
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pdevinfo.name = isd->id->name;
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pdevinfo.id = ipu_id * num_isd + isd->id->index;
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pdevinfo.parent = imxmd->md.dev;
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pdevinfo.data = &pdata;
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pdevinfo.size_data = sizeof(pdata);
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pdevinfo.dma_mask = DMA_BIT_MASK(32);
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pdev = platform_device_register_full(&pdevinfo);
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if (IS_ERR(pdev))
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return PTR_ERR(pdev);
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return imx_media_add_async_subdev(imxmd, NULL, pdev);
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}
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/* adds the internal subdevs in one ipu */
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static int add_ipu_internal_subdevs(struct imx_media_dev *imxmd, int ipu_id)
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{
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enum isd_enum i;
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for (i = 0; i < num_isd; i++) {
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const struct internal_subdev *isd = &int_subdev[i];
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int ret;
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/*
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* the CSIs are represented in the device-tree, so those
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* devices are already added to the async subdev list by
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* of_parse_subdev().
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*/
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switch (isd->id->grp_id) {
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case IMX_MEDIA_GRP_ID_CSI0:
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case IMX_MEDIA_GRP_ID_CSI1:
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ret = 0;
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break;
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default:
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ret = add_internal_subdev(imxmd, isd, ipu_id);
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break;
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}
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if (ret)
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return ret;
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}
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return 0;
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}
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int imx_media_add_internal_subdevs(struct imx_media_dev *imxmd)
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{
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int ret;
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ret = add_ipu_internal_subdevs(imxmd, 0);
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if (ret)
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goto remove;
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ret = add_ipu_internal_subdevs(imxmd, 1);
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if (ret)
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goto remove;
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return 0;
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remove:
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imx_media_remove_internal_subdevs(imxmd);
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return ret;
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}
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void imx_media_remove_internal_subdevs(struct imx_media_dev *imxmd)
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{
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struct imx_media_async_subdev *imxasd;
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list_for_each_entry(imxasd, &imxmd->asd_list, list) {
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if (!imxasd->pdev)
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continue;
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platform_device_unregister(imxasd->pdev);
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}
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}
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