/* * 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 "vsp1.h" #include "vsp1_dl.h" #include "vsp1_lut.h" #define LUT_MIN_SIZE 4U #define LUT_MAX_SIZE 8190U /* ----------------------------------------------------------------------------- * Device Access */ static inline void vsp1_lut_write(struct vsp1_lut *lut, struct vsp1_dl_list *dl, u32 reg, u32 data) { vsp1_dl_list_write(dl, reg, data); } /* ----------------------------------------------------------------------------- * Controls */ #define V4L2_CID_VSP1_LUT_TABLE (V4L2_CID_USER_BASE | 0x1001) static int lut_set_table(struct vsp1_lut *lut, struct v4l2_ctrl *ctrl) { struct vsp1_dl_body *dlb; unsigned int i; dlb = vsp1_dl_fragment_alloc(lut->entity.vsp1, 256); if (!dlb) return -ENOMEM; for (i = 0; i < 256; ++i) vsp1_dl_fragment_write(dlb, VI6_LUT_TABLE + 4 * i, ctrl->p_new.p_u32[i]); spin_lock_irq(&lut->lock); swap(lut->lut, dlb); spin_unlock_irq(&lut->lock); vsp1_dl_fragment_free(dlb); return 0; } static int lut_s_ctrl(struct v4l2_ctrl *ctrl) { struct vsp1_lut *lut = container_of(ctrl->handler, struct vsp1_lut, ctrls); switch (ctrl->id) { case V4L2_CID_VSP1_LUT_TABLE: lut_set_table(lut, ctrl); break; } return 0; } static const struct v4l2_ctrl_ops lut_ctrl_ops = { .s_ctrl = lut_s_ctrl, }; static const struct v4l2_ctrl_config lut_table_control = { .ops = &lut_ctrl_ops, .id = V4L2_CID_VSP1_LUT_TABLE, .name = "Look-Up Table", .type = V4L2_CTRL_TYPE_U32, .min = 0x00000000, .max = 0x00ffffff, .step = 1, .def = 0, .dims = { 256}, }; /* ----------------------------------------------------------------------------- * 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, }; return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes, ARRAY_SIZE(codes)); } static int lut_enum_frame_size(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_size_enum *fse) { return vsp1_subdev_enum_frame_size(subdev, cfg, fse, LUT_MIN_SIZE, LUT_MIN_SIZE, LUT_MAX_SIZE, LUT_MAX_SIZE); } 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_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; config = vsp1_entity_get_pad_config(&lut->entity, cfg, fmt->which); if (!config) return -EINVAL; /* 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, config, fmt->pad); if (fmt->pad == LUT_PAD_SOURCE) { /* The LUT output format can't be modified. */ fmt->format = *format; return 0; } format->code = fmt->format.code; 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, config, LUT_PAD_SOURCE); *format = fmt->format; return 0; } /* ----------------------------------------------------------------------------- * V4L2 Subdevice Operations */ static const struct v4l2_subdev_pad_ops lut_pad_ops = { .init_cfg = vsp1_entity_init_cfg, .enum_mbus_code = lut_enum_mbus_code, .enum_frame_size = lut_enum_frame_size, .get_fmt = vsp1_subdev_get_pad_format, .set_fmt = lut_set_format, }; static const struct v4l2_subdev_ops lut_ops = { .pad = &lut_pad_ops, }; /* ----------------------------------------------------------------------------- * VSP1 Entity Operations */ static void lut_configure(struct vsp1_entity *entity, struct vsp1_pipeline *pipe, struct vsp1_dl_list *dl, bool full) { struct vsp1_lut *lut = to_lut(&entity->subdev); struct vsp1_dl_body *dlb; unsigned long flags; if (full) { vsp1_lut_write(lut, dl, VI6_LUT_CTRL, VI6_LUT_CTRL_EN); return; } spin_lock_irqsave(&lut->lock, flags); dlb = lut->lut; lut->lut = NULL; spin_unlock_irqrestore(&lut->lock, flags); if (dlb) vsp1_dl_list_add_fragment(dl, dlb); } static const struct vsp1_entity_operations lut_entity_ops = { .configure = lut_configure, }; /* ----------------------------------------------------------------------------- * Initialization and Cleanup */ struct vsp1_lut *vsp1_lut_create(struct vsp1_device *vsp1) { struct vsp1_lut *lut; int ret; lut = devm_kzalloc(vsp1->dev, sizeof(*lut), GFP_KERNEL); if (lut == NULL) return ERR_PTR(-ENOMEM); spin_lock_init(&lut->lock); lut->entity.ops = &lut_entity_ops; lut->entity.type = VSP1_ENTITY_LUT; ret = vsp1_entity_init(vsp1, &lut->entity, "lut", 2, &lut_ops, MEDIA_ENT_F_PROC_VIDEO_LUT); if (ret < 0) return ERR_PTR(ret); /* Initialize the control handler. */ v4l2_ctrl_handler_init(&lut->ctrls, 1); v4l2_ctrl_new_custom(&lut->ctrls, &lut_table_control, NULL); lut->entity.subdev.ctrl_handler = &lut->ctrls; if (lut->ctrls.error) { dev_err(vsp1->dev, "lut: failed to initialize controls\n"); ret = lut->ctrls.error; vsp1_entity_destroy(&lut->entity); return ERR_PTR(ret); } v4l2_ctrl_handler_setup(&lut->ctrls); return lut; }