| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * vsp1_lut.c -- R-Car VSP1 Look-Up Table |
| * |
| * Copyright (C) 2013 Renesas Corporation |
| * |
| * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) |
| */ |
| |
| #include <linux/device.h> |
| #include <linux/gfp.h> |
| |
| #include <media/v4l2-subdev.h> |
| |
| #include "vsp1.h" |
| #include "vsp1_dl.h" |
| #include "vsp1_lut.h" |
| |
| #define LUT_MIN_SIZE 4U |
| #define LUT_MAX_SIZE 8190U |
| |
| #define LUT_SIZE 256 |
| |
| /* ----------------------------------------------------------------------------- |
| * Device Access |
| */ |
| |
| static inline void vsp1_lut_write(struct vsp1_lut *lut, |
| struct vsp1_dl_body *dlb, u32 reg, u32 data) |
| { |
| vsp1_dl_body_write(dlb, 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_body_get(lut->pool); |
| if (!dlb) |
| return -ENOMEM; |
| |
| for (i = 0; i < LUT_SIZE; ++i) |
| vsp1_dl_body_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_body_put(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 = { LUT_SIZE }, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * V4L2 Subdevice Pad Operations |
| */ |
| |
| static const unsigned int lut_codes[] = { |
| MEDIA_BUS_FMT_ARGB8888_1X32, |
| MEDIA_BUS_FMT_AHSV8888_1X32, |
| MEDIA_BUS_FMT_AYUV8_1X32, |
| }; |
| |
| static int lut_enum_mbus_code(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_mbus_code_enum *code) |
| { |
| return vsp1_subdev_enum_mbus_code(subdev, cfg, code, lut_codes, |
| ARRAY_SIZE(lut_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) |
| { |
| return vsp1_subdev_set_pad_format(subdev, cfg, fmt, lut_codes, |
| ARRAY_SIZE(lut_codes), |
| LUT_MIN_SIZE, LUT_MIN_SIZE, |
| LUT_MAX_SIZE, LUT_MAX_SIZE); |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * 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_stream(struct vsp1_entity *entity, |
| struct vsp1_pipeline *pipe, |
| struct vsp1_dl_body *dlb) |
| { |
| struct vsp1_lut *lut = to_lut(&entity->subdev); |
| |
| vsp1_lut_write(lut, dlb, VI6_LUT_CTRL, VI6_LUT_CTRL_EN); |
| } |
| |
| static void lut_configure_frame(struct vsp1_entity *entity, |
| struct vsp1_pipeline *pipe, |
| struct vsp1_dl_list *dl, |
| struct vsp1_dl_body *dlb) |
| { |
| struct vsp1_lut *lut = to_lut(&entity->subdev); |
| struct vsp1_dl_body *lut_dlb; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&lut->lock, flags); |
| lut_dlb = lut->lut; |
| lut->lut = NULL; |
| spin_unlock_irqrestore(&lut->lock, flags); |
| |
| if (lut_dlb) { |
| vsp1_dl_list_add_body(dl, lut_dlb); |
| |
| /* Release our local reference. */ |
| vsp1_dl_body_put(lut_dlb); |
| } |
| } |
| |
| static void lut_destroy(struct vsp1_entity *entity) |
| { |
| struct vsp1_lut *lut = to_lut(&entity->subdev); |
| |
| vsp1_dl_body_pool_destroy(lut->pool); |
| } |
| |
| static const struct vsp1_entity_operations lut_entity_ops = { |
| .configure_stream = lut_configure_stream, |
| .configure_frame = lut_configure_frame, |
| .destroy = lut_destroy, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * 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); |
| |
| /* |
| * Pre-allocate a body pool, with 3 bodies allowing a userspace update |
| * before the hardware has committed a previous set of tables, handling |
| * both the queued and pending dl entries. |
| */ |
| lut->pool = vsp1_dl_body_pool_create(vsp1, 3, LUT_SIZE, 0); |
| if (!lut->pool) |
| return ERR_PTR(-ENOMEM); |
| |
| /* 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; |
| } |