/* * vsp1_lut.c -- R-Car VSP1 Look-Up Table * * Copyright (C) 2013 Renesas Corporation * * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) * * 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 "vsp1.h" #include "vsp1_lut.h" #define LUT_MIN_SIZE 4U #define LUT_MAX_SIZE 8190U /* ----------------------------------------------------------------------------- * Device Access */ static inline u32 vsp1_lut_read(struct vsp1_lut *lut, u32 reg) { return vsp1_read(lut->entity.vsp1, reg); } static inline void vsp1_lut_write(struct vsp1_lut *lut, u32 reg, u32 data) { vsp1_write(lut->entity.vsp1, reg, data); } /* ----------------------------------------------------------------------------- * V4L2 Subdevice Core Operations */ static void lut_configure(struct vsp1_lut *lut, struct vsp1_lut_config *config) { memcpy_toio(lut->entity.vsp1->mmio + VI6_LUT_TABLE, config->lut, sizeof(config->lut)); } static long lut_ioctl(struct v4l2_subdev *subdev, unsigned int cmd, void *arg) { struct vsp1_lut *lut = to_lut(subdev); switch (cmd) { case VIDIOC_VSP1_LUT_CONFIG: lut_configure(lut, arg); return 0; default: return -ENOIOCTLCMD; } } /* ----------------------------------------------------------------------------- * V4L2 Subdevice Video Operations */ static int lut_s_stream(struct v4l2_subdev *subdev, int enable) { struct vsp1_lut *lut = to_lut(subdev); if (!enable) return 0; vsp1_lut_write(lut, VI6_LUT_CTRL, VI6_LUT_CTRL_EN); return 0; } /* ----------------------------------------------------------------------------- * V4L2 Subdevice Pad Operations */ static int lut_enum_mbus_code(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_mbus_code_enum *code) { static const unsigned int codes[] = { MEDIA_BUS_FMT_ARGB8888_1X32, MEDIA_BUS_FMT_AHSV8888_1X32, MEDIA_BUS_FMT_AYUV8_1X32, }; struct vsp1_lut *lut = to_lut(subdev); struct v4l2_mbus_framefmt *format; if (code->pad == LUT_PAD_SINK) { if (code->index >= ARRAY_SIZE(codes)) return -EINVAL; code->code = codes[code->index]; } else { /* The LUT can't perform format conversion, the sink format is * always identical to the source format. */ if (code->index) return -EINVAL; format = vsp1_entity_get_pad_format(&lut->entity, cfg, LUT_PAD_SINK, code->which); code->code = format->code; } return 0; } static int lut_enum_frame_size(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_size_enum *fse) { struct vsp1_lut *lut = to_lut(subdev); struct v4l2_mbus_framefmt *format; format = vsp1_entity_get_pad_format(&lut->entity, cfg, fse->pad, fse->which); if (fse->index || fse->code != format->code) return -EINVAL; if (fse->pad == LUT_PAD_SINK) { fse->min_width = LUT_MIN_SIZE; fse->max_width = LUT_MAX_SIZE; fse->min_height = LUT_MIN_SIZE; fse->max_height = LUT_MAX_SIZE; } else { /* The size on the source pad are fixed and always identical to * the size on the sink pad. */ fse->min_width = format->width; fse->max_width = format->width; fse->min_height = format->height; fse->max_height = format->height; } return 0; } static int lut_get_format(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct vsp1_lut *lut = to_lut(subdev); fmt->format = *vsp1_entity_get_pad_format(&lut->entity, cfg, fmt->pad, fmt->which); return 0; } static int lut_set_format(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct vsp1_lut *lut = to_lut(subdev); struct v4l2_mbus_framefmt *format; /* Default to YUV if the requested format is not supported. */ if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 && fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 && fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32) fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32; format = vsp1_entity_get_pad_format(&lut->entity, cfg, fmt->pad, fmt->which); if (fmt->pad == LUT_PAD_SOURCE) { /* The LUT output format can't be modified. */ fmt->format = *format; return 0; } format->width = clamp_t(unsigned int, fmt->format.width, LUT_MIN_SIZE, LUT_MAX_SIZE); format->height = clamp_t(unsigned int, fmt->format.height, LUT_MIN_SIZE, LUT_MAX_SIZE); format->field = V4L2_FIELD_NONE; format->colorspace = V4L2_COLORSPACE_SRGB; fmt->format = *format; /* Propagate the format to the source pad. */ format = vsp1_entity_get_pad_format(&lut->entity, cfg, LUT_PAD_SOURCE, fmt->which); *format = fmt->format; return 0; } /* ----------------------------------------------------------------------------- * V4L2 Subdevice Operations */ static struct v4l2_subdev_core_ops lut_core_ops = { .ioctl = lut_ioctl, }; static struct v4l2_subdev_video_ops lut_video_ops = { .s_stream = lut_s_stream, }; static struct v4l2_subdev_pad_ops lut_pad_ops = { .enum_mbus_code = lut_enum_mbus_code, .enum_frame_size = lut_enum_frame_size, .get_fmt = lut_get_format, .set_fmt = lut_set_format, }; static struct v4l2_subdev_ops lut_ops = { .core = &lut_core_ops, .video = &lut_video_ops, .pad = &lut_pad_ops, }; /* ----------------------------------------------------------------------------- * Initialization and Cleanup */ struct vsp1_lut *vsp1_lut_create(struct vsp1_device *vsp1) { struct v4l2_subdev *subdev; struct vsp1_lut *lut; int ret; lut = devm_kzalloc(vsp1->dev, sizeof(*lut), GFP_KERNEL); if (lut == NULL) return ERR_PTR(-ENOMEM); lut->entity.type = VSP1_ENTITY_LUT; ret = vsp1_entity_init(vsp1, &lut->entity, 2); if (ret < 0) return ERR_PTR(ret); /* Initialize the V4L2 subdev. */ subdev = &lut->entity.subdev; v4l2_subdev_init(subdev, &lut_ops); subdev->entity.ops = &vsp1_media_ops; subdev->internal_ops = &vsp1_subdev_internal_ops; snprintf(subdev->name, sizeof(subdev->name), "%s lut", dev_name(vsp1->dev)); v4l2_set_subdevdata(subdev, lut); subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; vsp1_entity_init_formats(subdev, NULL); return lut; }