1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * vsp1_hgo.c -- R-Car VSP1 Histogram Generator 1D 4 * 5 * Copyright (C) 2016 Renesas Electronics Corporation 6 * 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 Access 24 */ 25 26 static inline u32 vsp1_hgo_read(struct vsp1_hgo *hgo, u32 reg) 27 { 28 return vsp1_read(hgo->histo.entity.vsp1, reg); 29 } 30 31 static 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 Handler 39 */ 40 41 void 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 * Controls 97 */ 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) 101 102 static 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 }; 112 113 static const s64 hgo_num_bins[] = { 114 64, 256, 115 }; 116 117 static 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 Operations 130 */ 131 132 static void hgo_configure_stream(struct vsp1_entity *entity, 133 struct vsp1_pipeline *pipe, 134 struct vsp1_dl_list *dl, 135 struct vsp1_dl_body *dlb) 136 { 137 struct vsp1_hgo *hgo = to_hgo(&entity->subdev); 138 struct v4l2_rect *compose; 139 struct v4l2_rect *crop; 140 unsigned int hratio; 141 unsigned int vratio; 142 143 crop = vsp1_entity_get_pad_selection(entity, entity->state, 144 HISTO_PAD_SINK, V4L2_SEL_TGT_CROP); 145 compose = vsp1_entity_get_pad_selection(entity, entity->state, 146 HISTO_PAD_SINK, 147 V4L2_SEL_TGT_COMPOSE); 148 149 vsp1_hgo_write(hgo, dlb, VI6_HGO_REGRST, VI6_HGO_REGRST_RCLEA); 150 151 vsp1_hgo_write(hgo, dlb, VI6_HGO_OFFSET, 152 (crop->left << VI6_HGO_OFFSET_HOFFSET_SHIFT) | 153 (crop->top << VI6_HGO_OFFSET_VOFFSET_SHIFT)); 154 vsp1_hgo_write(hgo, dlb, VI6_HGO_SIZE, 155 (crop->width << VI6_HGO_SIZE_HSIZE_SHIFT) | 156 (crop->height << VI6_HGO_SIZE_VSIZE_SHIFT)); 157 158 mutex_lock(hgo->ctrls.handler.lock); 159 hgo->max_rgb = hgo->ctrls.max_rgb->cur.val; 160 if (hgo->ctrls.num_bins) 161 hgo->num_bins = hgo_num_bins[hgo->ctrls.num_bins->cur.val]; 162 mutex_unlock(hgo->ctrls.handler.lock); 163 164 hratio = crop->width * 2 / compose->width / 3; 165 vratio = crop->height * 2 / compose->height / 3; 166 vsp1_hgo_write(hgo, dlb, VI6_HGO_MODE, 167 (hgo->num_bins == 256 ? VI6_HGO_MODE_STEP : 0) | 168 (hgo->max_rgb ? VI6_HGO_MODE_MAXRGB : 0) | 169 (hratio << VI6_HGO_MODE_HRATIO_SHIFT) | 170 (vratio << VI6_HGO_MODE_VRATIO_SHIFT)); 171 } 172 173 static const struct vsp1_entity_operations hgo_entity_ops = { 174 .configure_stream = hgo_configure_stream, 175 .destroy = vsp1_histogram_destroy, 176 }; 177 178 /* ----------------------------------------------------------------------------- 179 * Initialization and Cleanup 180 */ 181 182 static const unsigned int hgo_mbus_formats[] = { 183 MEDIA_BUS_FMT_AYUV8_1X32, 184 MEDIA_BUS_FMT_ARGB8888_1X32, 185 MEDIA_BUS_FMT_AHSV8888_1X32, 186 }; 187 188 struct vsp1_hgo *vsp1_hgo_create(struct vsp1_device *vsp1) 189 { 190 struct vsp1_hgo *hgo; 191 int ret; 192 193 hgo = devm_kzalloc(vsp1->dev, sizeof(*hgo), GFP_KERNEL); 194 if (hgo == NULL) 195 return ERR_PTR(-ENOMEM); 196 197 /* Initialize the control handler. */ 198 v4l2_ctrl_handler_init(&hgo->ctrls.handler, 199 vsp1->info->gen >= 3 ? 2 : 1); 200 hgo->ctrls.max_rgb = v4l2_ctrl_new_custom(&hgo->ctrls.handler, 201 &hgo_max_rgb_control, NULL); 202 if (vsp1->info->gen >= 3) 203 hgo->ctrls.num_bins = 204 v4l2_ctrl_new_custom(&hgo->ctrls.handler, 205 &hgo_num_bins_control, NULL); 206 207 hgo->max_rgb = false; 208 hgo->num_bins = 64; 209 210 hgo->histo.entity.subdev.ctrl_handler = &hgo->ctrls.handler; 211 212 /* Initialize the video device and queue for statistics data. */ 213 ret = vsp1_histogram_init(vsp1, &hgo->histo, VSP1_ENTITY_HGO, "hgo", 214 &hgo_entity_ops, hgo_mbus_formats, 215 ARRAY_SIZE(hgo_mbus_formats), 216 HGO_DATA_SIZE, V4L2_META_FMT_VSP1_HGO); 217 if (ret < 0) { 218 vsp1_entity_destroy(&hgo->histo.entity); 219 return ERR_PTR(ret); 220 } 221 222 return hgo; 223 } 224