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1// SPDX-License-Identifier: GPL-2.0+2/*3 * vsp1_lut.c -- R-Car VSP1 Look-Up Table4 *5 * Copyright (C) 2013 Renesas Corporation6 *7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)8 */9 10#include <linux/device.h>11#include <linux/gfp.h>12 13#include <media/v4l2-subdev.h>14 15#include "vsp1.h"16#include "vsp1_dl.h"17#include "vsp1_lut.h"18 19#define LUT_MIN_SIZE 4U20#define LUT_MAX_SIZE 8190U21 22#define LUT_SIZE 25623 24/* -----------------------------------------------------------------------------25 * Device Access26 */27 28static inline void vsp1_lut_write(struct vsp1_lut *lut,29 struct vsp1_dl_body *dlb, u32 reg, u32 data)30{31 vsp1_dl_body_write(dlb, reg, data);32}33 34/* -----------------------------------------------------------------------------35 * Controls36 */37 38#define V4L2_CID_VSP1_LUT_TABLE (V4L2_CID_USER_BASE | 0x1001)39 40static int lut_set_table(struct vsp1_lut *lut, struct v4l2_ctrl *ctrl)41{42 struct vsp1_dl_body *dlb;43 unsigned int i;44 45 dlb = vsp1_dl_body_get(lut->pool);46 if (!dlb)47 return -ENOMEM;48 49 for (i = 0; i < LUT_SIZE; ++i)50 vsp1_dl_body_write(dlb, VI6_LUT_TABLE + 4 * i,51 ctrl->p_new.p_u32[i]);52 53 spin_lock_irq(&lut->lock);54 swap(lut->lut, dlb);55 spin_unlock_irq(&lut->lock);56 57 vsp1_dl_body_put(dlb);58 return 0;59}60 61static int lut_s_ctrl(struct v4l2_ctrl *ctrl)62{63 struct vsp1_lut *lut =64 container_of(ctrl->handler, struct vsp1_lut, ctrls);65 66 switch (ctrl->id) {67 case V4L2_CID_VSP1_LUT_TABLE:68 lut_set_table(lut, ctrl);69 break;70 }71 72 return 0;73}74 75static const struct v4l2_ctrl_ops lut_ctrl_ops = {76 .s_ctrl = lut_s_ctrl,77};78 79static const struct v4l2_ctrl_config lut_table_control = {80 .ops = &lut_ctrl_ops,81 .id = V4L2_CID_VSP1_LUT_TABLE,82 .name = "Look-Up Table",83 .type = V4L2_CTRL_TYPE_U32,84 .min = 0x00000000,85 .max = 0x00ffffff,86 .step = 1,87 .def = 0,88 .dims = { LUT_SIZE },89};90 91/* -----------------------------------------------------------------------------92 * V4L2 Subdevice Pad Operations93 */94 95static const unsigned int lut_codes[] = {96 MEDIA_BUS_FMT_ARGB8888_1X32,97 MEDIA_BUS_FMT_AHSV8888_1X32,98 MEDIA_BUS_FMT_AYUV8_1X32,99};100 101static int lut_enum_mbus_code(struct v4l2_subdev *subdev,102 struct v4l2_subdev_state *sd_state,103 struct v4l2_subdev_mbus_code_enum *code)104{105 return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, lut_codes,106 ARRAY_SIZE(lut_codes));107}108 109static int lut_enum_frame_size(struct v4l2_subdev *subdev,110 struct v4l2_subdev_state *sd_state,111 struct v4l2_subdev_frame_size_enum *fse)112{113 return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,114 LUT_MIN_SIZE,115 LUT_MIN_SIZE, LUT_MAX_SIZE,116 LUT_MAX_SIZE);117}118 119static int lut_set_format(struct v4l2_subdev *subdev,120 struct v4l2_subdev_state *sd_state,121 struct v4l2_subdev_format *fmt)122{123 return vsp1_subdev_set_pad_format(subdev, sd_state, fmt, lut_codes,124 ARRAY_SIZE(lut_codes),125 LUT_MIN_SIZE, LUT_MIN_SIZE,126 LUT_MAX_SIZE, LUT_MAX_SIZE);127}128 129/* -----------------------------------------------------------------------------130 * V4L2 Subdevice Operations131 */132 133static const struct v4l2_subdev_pad_ops lut_pad_ops = {134 .enum_mbus_code = lut_enum_mbus_code,135 .enum_frame_size = lut_enum_frame_size,136 .get_fmt = vsp1_subdev_get_pad_format,137 .set_fmt = lut_set_format,138};139 140static const struct v4l2_subdev_ops lut_ops = {141 .pad = &lut_pad_ops,142};143 144/* -----------------------------------------------------------------------------145 * VSP1 Entity Operations146 */147 148static void lut_configure_stream(struct vsp1_entity *entity,149 struct v4l2_subdev_state *state,150 struct vsp1_pipeline *pipe,151 struct vsp1_dl_list *dl,152 struct vsp1_dl_body *dlb)153{154 struct vsp1_lut *lut = to_lut(&entity->subdev);155 156 vsp1_lut_write(lut, dlb, VI6_LUT_CTRL, VI6_LUT_CTRL_EN);157}158 159static void lut_configure_frame(struct vsp1_entity *entity,160 struct vsp1_pipeline *pipe,161 struct vsp1_dl_list *dl,162 struct vsp1_dl_body *dlb)163{164 struct vsp1_lut *lut = to_lut(&entity->subdev);165 struct vsp1_dl_body *lut_dlb;166 unsigned long flags;167 168 spin_lock_irqsave(&lut->lock, flags);169 lut_dlb = lut->lut;170 lut->lut = NULL;171 spin_unlock_irqrestore(&lut->lock, flags);172 173 if (lut_dlb) {174 vsp1_dl_list_add_body(dl, lut_dlb);175 176 /* Release our local reference. */177 vsp1_dl_body_put(lut_dlb);178 }179}180 181static void lut_destroy(struct vsp1_entity *entity)182{183 struct vsp1_lut *lut = to_lut(&entity->subdev);184 185 vsp1_dl_body_pool_destroy(lut->pool);186}187 188static const struct vsp1_entity_operations lut_entity_ops = {189 .configure_stream = lut_configure_stream,190 .configure_frame = lut_configure_frame,191 .destroy = lut_destroy,192};193 194/* -----------------------------------------------------------------------------195 * Initialization and Cleanup196 */197 198struct vsp1_lut *vsp1_lut_create(struct vsp1_device *vsp1)199{200 struct vsp1_lut *lut;201 int ret;202 203 lut = devm_kzalloc(vsp1->dev, sizeof(*lut), GFP_KERNEL);204 if (lut == NULL)205 return ERR_PTR(-ENOMEM);206 207 spin_lock_init(&lut->lock);208 209 lut->entity.ops = &lut_entity_ops;210 lut->entity.type = VSP1_ENTITY_LUT;211 212 ret = vsp1_entity_init(vsp1, &lut->entity, "lut", 2, &lut_ops,213 MEDIA_ENT_F_PROC_VIDEO_LUT);214 if (ret < 0)215 return ERR_PTR(ret);216 217 /*218 * Pre-allocate a body pool, with 3 bodies allowing a userspace update219 * before the hardware has committed a previous set of tables, handling220 * both the queued and pending dl entries.221 */222 lut->pool = vsp1_dl_body_pool_create(vsp1, 3, LUT_SIZE, 0);223 if (!lut->pool)224 return ERR_PTR(-ENOMEM);225 226 /* Initialize the control handler. */227 v4l2_ctrl_handler_init(&lut->ctrls, 1);228 v4l2_ctrl_new_custom(&lut->ctrls, &lut_table_control, NULL);229 230 lut->entity.subdev.ctrl_handler = &lut->ctrls;231 232 if (lut->ctrls.error) {233 dev_err(vsp1->dev, "lut: failed to initialize controls\n");234 ret = lut->ctrls.error;235 vsp1_entity_destroy(&lut->entity);236 return ERR_PTR(ret);237 }238 239 v4l2_ctrl_handler_setup(&lut->ctrls);240 241 return lut;242}243