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1// SPDX-License-Identifier: GPL-2.0+2/*3 * vsp1_hgo.c -- R-Car VSP1 Histogram Generator 1D4 *5 * Copyright (C) 2016 Renesas Electronics 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#include <media/videobuf2-vmalloc.h>15 16#include "vsp1.h"17#include "vsp1_dl.h"18#include "vsp1_hgo.h"19 20#define HGO_DATA_SIZE ((2 + 256) * 4)21 22/* -----------------------------------------------------------------------------23 * Device Access24 */25 26static inline u32 vsp1_hgo_read(struct vsp1_hgo *hgo, u32 reg)27{28 return vsp1_read(hgo->histo.entity.vsp1, reg);29}30 31static inline void vsp1_hgo_write(struct vsp1_hgo *hgo,32 struct vsp1_dl_body *dlb, u32 reg, u32 data)33{34 vsp1_dl_body_write(dlb, reg, data);35}36 37/* -----------------------------------------------------------------------------38 * Frame End Handler39 */40 41void vsp1_hgo_frame_end(struct vsp1_entity *entity)42{43 struct vsp1_hgo *hgo = to_hgo(&entity->subdev);44 struct vsp1_histogram_buffer *buf;45 unsigned int i;46 size_t size;47 u32 *data;48 49 buf = vsp1_histogram_buffer_get(&hgo->histo);50 if (!buf)51 return;52 53 data = buf->addr;54 55 if (hgo->num_bins == 256) {56 *data++ = vsp1_hgo_read(hgo, VI6_HGO_G_MAXMIN);57 *data++ = vsp1_hgo_read(hgo, VI6_HGO_G_SUM);58 59 for (i = 0; i < 256; ++i) {60 vsp1_write(hgo->histo.entity.vsp1,61 VI6_HGO_EXT_HIST_ADDR, i);62 *data++ = vsp1_hgo_read(hgo, VI6_HGO_EXT_HIST_DATA);63 }64 65 size = (2 + 256) * sizeof(u32);66 } else if (hgo->max_rgb) {67 *data++ = vsp1_hgo_read(hgo, VI6_HGO_G_MAXMIN);68 *data++ = vsp1_hgo_read(hgo, VI6_HGO_G_SUM);69 70 for (i = 0; i < 64; ++i)71 *data++ = vsp1_hgo_read(hgo, VI6_HGO_G_HISTO(i));72 73 size = (2 + 64) * sizeof(u32);74 } else {75 *data++ = vsp1_hgo_read(hgo, VI6_HGO_R_MAXMIN);76 *data++ = vsp1_hgo_read(hgo, VI6_HGO_G_MAXMIN);77 *data++ = vsp1_hgo_read(hgo, VI6_HGO_B_MAXMIN);78 79 *data++ = vsp1_hgo_read(hgo, VI6_HGO_R_SUM);80 *data++ = vsp1_hgo_read(hgo, VI6_HGO_G_SUM);81 *data++ = vsp1_hgo_read(hgo, VI6_HGO_B_SUM);82 83 for (i = 0; i < 64; ++i) {84 data[i] = vsp1_hgo_read(hgo, VI6_HGO_R_HISTO(i));85 data[i+64] = vsp1_hgo_read(hgo, VI6_HGO_G_HISTO(i));86 data[i+128] = vsp1_hgo_read(hgo, VI6_HGO_B_HISTO(i));87 }88 89 size = (6 + 64 * 3) * sizeof(u32);90 }91 92 vsp1_histogram_buffer_complete(&hgo->histo, buf, size);93}94 95/* -----------------------------------------------------------------------------96 * Controls97 */98 99#define V4L2_CID_VSP1_HGO_MAX_RGB (V4L2_CID_USER_BASE | 0x1001)100#define V4L2_CID_VSP1_HGO_NUM_BINS (V4L2_CID_USER_BASE | 0x1002)101 102static const struct v4l2_ctrl_config hgo_max_rgb_control = {103 .id = V4L2_CID_VSP1_HGO_MAX_RGB,104 .name = "Maximum RGB Mode",105 .type = V4L2_CTRL_TYPE_BOOLEAN,106 .min = 0,107 .max = 1,108 .def = 0,109 .step = 1,110 .flags = V4L2_CTRL_FLAG_MODIFY_LAYOUT,111};112 113static const s64 hgo_num_bins[] = {114 64, 256,115};116 117static const struct v4l2_ctrl_config hgo_num_bins_control = {118 .id = V4L2_CID_VSP1_HGO_NUM_BINS,119 .name = "Number of Bins",120 .type = V4L2_CTRL_TYPE_INTEGER_MENU,121 .min = 0,122 .max = 1,123 .def = 0,124 .qmenu_int = hgo_num_bins,125 .flags = V4L2_CTRL_FLAG_MODIFY_LAYOUT,126};127 128/* -----------------------------------------------------------------------------129 * VSP1 Entity Operations130 */131 132static void hgo_configure_stream(struct vsp1_entity *entity,133 struct v4l2_subdev_state *state,134 struct vsp1_pipeline *pipe,135 struct vsp1_dl_list *dl,136 struct vsp1_dl_body *dlb)137{138 struct vsp1_hgo *hgo = to_hgo(&entity->subdev);139 struct v4l2_rect *compose;140 struct v4l2_rect *crop;141 unsigned int hratio;142 unsigned int vratio;143 144 crop = v4l2_subdev_state_get_crop(state, HISTO_PAD_SINK);145 compose = v4l2_subdev_state_get_compose(state, HISTO_PAD_SINK);146 147 vsp1_hgo_write(hgo, dlb, VI6_HGO_REGRST, VI6_HGO_REGRST_RCLEA);148 149 vsp1_hgo_write(hgo, dlb, VI6_HGO_OFFSET,150 (crop->left << VI6_HGO_OFFSET_HOFFSET_SHIFT) |151 (crop->top << VI6_HGO_OFFSET_VOFFSET_SHIFT));152 vsp1_hgo_write(hgo, dlb, VI6_HGO_SIZE,153 (crop->width << VI6_HGO_SIZE_HSIZE_SHIFT) |154 (crop->height << VI6_HGO_SIZE_VSIZE_SHIFT));155 156 mutex_lock(hgo->ctrls.handler.lock);157 hgo->max_rgb = hgo->ctrls.max_rgb->cur.val;158 if (hgo->ctrls.num_bins)159 hgo->num_bins = hgo_num_bins[hgo->ctrls.num_bins->cur.val];160 mutex_unlock(hgo->ctrls.handler.lock);161 162 hratio = crop->width * 2 / compose->width / 3;163 vratio = crop->height * 2 / compose->height / 3;164 vsp1_hgo_write(hgo, dlb, VI6_HGO_MODE,165 (hgo->num_bins == 256 ? VI6_HGO_MODE_STEP : 0) |166 (hgo->max_rgb ? VI6_HGO_MODE_MAXRGB : 0) |167 (hratio << VI6_HGO_MODE_HRATIO_SHIFT) |168 (vratio << VI6_HGO_MODE_VRATIO_SHIFT));169}170 171static const struct vsp1_entity_operations hgo_entity_ops = {172 .configure_stream = hgo_configure_stream,173 .destroy = vsp1_histogram_destroy,174};175 176/* -----------------------------------------------------------------------------177 * Initialization and Cleanup178 */179 180static const unsigned int hgo_mbus_formats[] = {181 MEDIA_BUS_FMT_AYUV8_1X32,182 MEDIA_BUS_FMT_ARGB8888_1X32,183 MEDIA_BUS_FMT_AHSV8888_1X32,184};185 186struct vsp1_hgo *vsp1_hgo_create(struct vsp1_device *vsp1)187{188 struct vsp1_hgo *hgo;189 int ret;190 191 hgo = devm_kzalloc(vsp1->dev, sizeof(*hgo), GFP_KERNEL);192 if (hgo == NULL)193 return ERR_PTR(-ENOMEM);194 195 /* Initialize the video device and queue for statistics data. */196 ret = vsp1_histogram_init(vsp1, &hgo->histo, VSP1_ENTITY_HGO, "hgo",197 &hgo_entity_ops, hgo_mbus_formats,198 ARRAY_SIZE(hgo_mbus_formats),199 HGO_DATA_SIZE, V4L2_META_FMT_VSP1_HGO);200 if (ret < 0) {201 vsp1_entity_destroy(&hgo->histo.entity);202 return ERR_PTR(ret);203 }204 205 /* Initialize the control handler. */206 v4l2_ctrl_handler_init(&hgo->ctrls.handler,207 vsp1->info->gen >= 3 ? 2 : 1);208 hgo->ctrls.max_rgb = v4l2_ctrl_new_custom(&hgo->ctrls.handler,209 &hgo_max_rgb_control, NULL);210 if (vsp1->info->gen >= 3)211 hgo->ctrls.num_bins =212 v4l2_ctrl_new_custom(&hgo->ctrls.handler,213 &hgo_num_bins_control, NULL);214 215 hgo->max_rgb = false;216 hgo->num_bins = 64;217 218 hgo->histo.entity.subdev.ctrl_handler = &hgo->ctrls.handler;219 220 return hgo;221}222