// SPDX-License-Identifier: GPL-2.0+
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/*
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* vsp1_lut.c -- R-Car VSP1 Look-Up Table
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*
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* Copyright (C) 2013 Renesas Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*/
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#include <linux/device.h>
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#include <linux/gfp.h>
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#include <media/v4l2-subdev.h>
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#include "vsp1.h"
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#include "vsp1_dl.h"
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#include "vsp1_lut.h"
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#define LUT_MIN_SIZE 4U
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#define LUT_MAX_SIZE 8190U
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#define LUT_SIZE 256
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/* -----------------------------------------------------------------------------
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* Device Access
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*/
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static inline void vsp1_lut_write(struct vsp1_lut *lut,
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struct vsp1_dl_body *dlb, u32 reg, u32 data)
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{
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vsp1_dl_body_write(dlb, reg, data);
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}
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/* -----------------------------------------------------------------------------
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* Controls
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*/
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#define V4L2_CID_VSP1_LUT_TABLE (V4L2_CID_USER_BASE | 0x1001)
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static int lut_set_table(struct vsp1_lut *lut, struct v4l2_ctrl *ctrl)
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{
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struct vsp1_dl_body *dlb;
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unsigned int i;
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dlb = vsp1_dl_body_get(lut->pool);
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if (!dlb)
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return -ENOMEM;
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for (i = 0; i < LUT_SIZE; ++i)
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vsp1_dl_body_write(dlb, VI6_LUT_TABLE + 4 * i,
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ctrl->p_new.p_u32[i]);
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spin_lock_irq(&lut->lock);
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swap(lut->lut, dlb);
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spin_unlock_irq(&lut->lock);
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vsp1_dl_body_put(dlb);
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return 0;
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}
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static int lut_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct vsp1_lut *lut =
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container_of(ctrl->handler, struct vsp1_lut, ctrls);
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switch (ctrl->id) {
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case V4L2_CID_VSP1_LUT_TABLE:
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lut_set_table(lut, ctrl);
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break;
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}
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return 0;
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}
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static const struct v4l2_ctrl_ops lut_ctrl_ops = {
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.s_ctrl = lut_s_ctrl,
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};
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static const struct v4l2_ctrl_config lut_table_control = {
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.ops = &lut_ctrl_ops,
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.id = V4L2_CID_VSP1_LUT_TABLE,
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.name = "Look-Up Table",
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.type = V4L2_CTRL_TYPE_U32,
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.min = 0x00000000,
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.max = 0x00ffffff,
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.step = 1,
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.def = 0,
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.dims = { LUT_SIZE },
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};
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/* -----------------------------------------------------------------------------
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* V4L2 Subdevice Pad Operations
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*/
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static const unsigned int lut_codes[] = {
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MEDIA_BUS_FMT_ARGB8888_1X32,
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MEDIA_BUS_FMT_AHSV8888_1X32,
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MEDIA_BUS_FMT_AYUV8_1X32,
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};
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static int lut_enum_mbus_code(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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return vsp1_subdev_enum_mbus_code(subdev, cfg, code, lut_codes,
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ARRAY_SIZE(lut_codes));
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}
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static int lut_enum_frame_size(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_frame_size_enum *fse)
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{
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return vsp1_subdev_enum_frame_size(subdev, cfg, fse, LUT_MIN_SIZE,
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LUT_MIN_SIZE, LUT_MAX_SIZE,
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LUT_MAX_SIZE);
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}
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static int lut_set_format(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *fmt)
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{
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return vsp1_subdev_set_pad_format(subdev, cfg, fmt, lut_codes,
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ARRAY_SIZE(lut_codes),
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LUT_MIN_SIZE, LUT_MIN_SIZE,
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LUT_MAX_SIZE, LUT_MAX_SIZE);
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}
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/* -----------------------------------------------------------------------------
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* V4L2 Subdevice Operations
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*/
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static const struct v4l2_subdev_pad_ops lut_pad_ops = {
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.init_cfg = vsp1_entity_init_cfg,
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.enum_mbus_code = lut_enum_mbus_code,
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.enum_frame_size = lut_enum_frame_size,
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.get_fmt = vsp1_subdev_get_pad_format,
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.set_fmt = lut_set_format,
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};
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static const struct v4l2_subdev_ops lut_ops = {
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.pad = &lut_pad_ops,
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};
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/* -----------------------------------------------------------------------------
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* VSP1 Entity Operations
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*/
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static void lut_configure_stream(struct vsp1_entity *entity,
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struct vsp1_pipeline *pipe,
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struct vsp1_dl_list *dl,
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struct vsp1_dl_body *dlb)
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{
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struct vsp1_lut *lut = to_lut(&entity->subdev);
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vsp1_lut_write(lut, dlb, VI6_LUT_CTRL, VI6_LUT_CTRL_EN);
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}
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static void lut_configure_frame(struct vsp1_entity *entity,
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struct vsp1_pipeline *pipe,
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struct vsp1_dl_list *dl,
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struct vsp1_dl_body *dlb)
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{
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struct vsp1_lut *lut = to_lut(&entity->subdev);
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struct vsp1_dl_body *lut_dlb;
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unsigned long flags;
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spin_lock_irqsave(&lut->lock, flags);
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lut_dlb = lut->lut;
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lut->lut = NULL;
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spin_unlock_irqrestore(&lut->lock, flags);
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if (lut_dlb) {
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vsp1_dl_list_add_body(dl, lut_dlb);
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/* Release our local reference. */
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vsp1_dl_body_put(lut_dlb);
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}
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}
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static void lut_destroy(struct vsp1_entity *entity)
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{
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struct vsp1_lut *lut = to_lut(&entity->subdev);
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vsp1_dl_body_pool_destroy(lut->pool);
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}
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static const struct vsp1_entity_operations lut_entity_ops = {
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.configure_stream = lut_configure_stream,
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.configure_frame = lut_configure_frame,
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.destroy = lut_destroy,
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};
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/* -----------------------------------------------------------------------------
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* Initialization and Cleanup
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*/
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struct vsp1_lut *vsp1_lut_create(struct vsp1_device *vsp1)
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{
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struct vsp1_lut *lut;
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int ret;
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lut = devm_kzalloc(vsp1->dev, sizeof(*lut), GFP_KERNEL);
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if (lut == NULL)
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return ERR_PTR(-ENOMEM);
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spin_lock_init(&lut->lock);
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lut->entity.ops = &lut_entity_ops;
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lut->entity.type = VSP1_ENTITY_LUT;
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ret = vsp1_entity_init(vsp1, &lut->entity, "lut", 2, &lut_ops,
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MEDIA_ENT_F_PROC_VIDEO_LUT);
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if (ret < 0)
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return ERR_PTR(ret);
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/*
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* Pre-allocate a body pool, with 3 bodies allowing a userspace update
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* before the hardware has committed a previous set of tables, handling
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* both the queued and pending dl entries.
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*/
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lut->pool = vsp1_dl_body_pool_create(vsp1, 3, LUT_SIZE, 0);
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if (!lut->pool)
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return ERR_PTR(-ENOMEM);
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/* Initialize the control handler. */
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v4l2_ctrl_handler_init(&lut->ctrls, 1);
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v4l2_ctrl_new_custom(&lut->ctrls, &lut_table_control, NULL);
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lut->entity.subdev.ctrl_handler = &lut->ctrls;
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if (lut->ctrls.error) {
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dev_err(vsp1->dev, "lut: failed to initialize controls\n");
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ret = lut->ctrls.error;
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vsp1_entity_destroy(&lut->entity);
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return ERR_PTR(ret);
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}
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v4l2_ctrl_handler_setup(&lut->ctrls);
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return lut;
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}
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