1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * vsp1_uif.c -- R-Car VSP1 User Logic Interface 4 * 5 * Copyright (C) 2017-2018 Laurent Pinchart 6 * 7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) 8 */ 9 10 #include <linux/device.h> 11 #include <linux/gfp.h> 12 #include <linux/sys_soc.h> 13 14 #include <media/media-entity.h> 15 #include <media/v4l2-subdev.h> 16 17 #include "vsp1.h" 18 #include "vsp1_dl.h" 19 #include "vsp1_entity.h" 20 #include "vsp1_uif.h" 21 22 #define UIF_MIN_SIZE 4U 23 #define UIF_MAX_SIZE 8190U 24 25 /* ----------------------------------------------------------------------------- 26 * Device Access 27 */ 28 29 static inline u32 vsp1_uif_read(struct vsp1_uif *uif, u32 reg) 30 { 31 return vsp1_read(uif->entity.vsp1, 32 uif->entity.index * VI6_UIF_OFFSET + reg); 33 } 34 35 static inline void vsp1_uif_write(struct vsp1_uif *uif, 36 struct vsp1_dl_body *dlb, u32 reg, u32 data) 37 { 38 vsp1_dl_body_write(dlb, reg + uif->entity.index * VI6_UIF_OFFSET, data); 39 } 40 41 u32 vsp1_uif_get_crc(struct vsp1_uif *uif) 42 { 43 return vsp1_uif_read(uif, VI6_UIF_DISCOM_DOCMCCRCR); 44 } 45 46 /* ----------------------------------------------------------------------------- 47 * V4L2 Subdevice Pad Operations 48 */ 49 50 static const unsigned int uif_codes[] = { 51 MEDIA_BUS_FMT_ARGB8888_1X32, 52 MEDIA_BUS_FMT_AHSV8888_1X32, 53 MEDIA_BUS_FMT_AYUV8_1X32, 54 }; 55 56 static int uif_enum_mbus_code(struct v4l2_subdev *subdev, 57 struct v4l2_subdev_state *sd_state, 58 struct v4l2_subdev_mbus_code_enum *code) 59 { 60 return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, uif_codes, 61 ARRAY_SIZE(uif_codes)); 62 } 63 64 static int uif_enum_frame_size(struct v4l2_subdev *subdev, 65 struct v4l2_subdev_state *sd_state, 66 struct v4l2_subdev_frame_size_enum *fse) 67 { 68 return vsp1_subdev_enum_frame_size(subdev, sd_state, fse, 69 UIF_MIN_SIZE, 70 UIF_MIN_SIZE, UIF_MAX_SIZE, 71 UIF_MAX_SIZE); 72 } 73 74 static int uif_set_format(struct v4l2_subdev *subdev, 75 struct v4l2_subdev_state *sd_state, 76 struct v4l2_subdev_format *fmt) 77 { 78 return vsp1_subdev_set_pad_format(subdev, sd_state, fmt, uif_codes, 79 ARRAY_SIZE(uif_codes), 80 UIF_MIN_SIZE, UIF_MIN_SIZE, 81 UIF_MAX_SIZE, UIF_MAX_SIZE); 82 } 83 84 static int uif_get_selection(struct v4l2_subdev *subdev, 85 struct v4l2_subdev_state *sd_state, 86 struct v4l2_subdev_selection *sel) 87 { 88 struct vsp1_uif *uif = to_uif(subdev); 89 struct v4l2_subdev_state *state; 90 struct v4l2_mbus_framefmt *format; 91 int ret = 0; 92 93 if (sel->pad != UIF_PAD_SINK) 94 return -EINVAL; 95 96 mutex_lock(&uif->entity.lock); 97 98 state = vsp1_entity_get_state(&uif->entity, sd_state, sel->which); 99 if (!state) { 100 ret = -EINVAL; 101 goto done; 102 } 103 104 switch (sel->target) { 105 case V4L2_SEL_TGT_CROP_BOUNDS: 106 case V4L2_SEL_TGT_CROP_DEFAULT: 107 format = v4l2_subdev_state_get_format(state, UIF_PAD_SINK); 108 sel->r.left = 0; 109 sel->r.top = 0; 110 sel->r.width = format->width; 111 sel->r.height = format->height; 112 break; 113 114 case V4L2_SEL_TGT_CROP: 115 sel->r = *v4l2_subdev_state_get_crop(state, sel->pad); 116 break; 117 118 default: 119 ret = -EINVAL; 120 break; 121 } 122 123 done: 124 mutex_unlock(&uif->entity.lock); 125 return ret; 126 } 127 128 static int uif_set_selection(struct v4l2_subdev *subdev, 129 struct v4l2_subdev_state *sd_state, 130 struct v4l2_subdev_selection *sel) 131 { 132 struct vsp1_uif *uif = to_uif(subdev); 133 struct v4l2_subdev_state *state; 134 struct v4l2_mbus_framefmt *format; 135 struct v4l2_rect *selection; 136 int ret = 0; 137 138 if (sel->pad != UIF_PAD_SINK || 139 sel->target != V4L2_SEL_TGT_CROP) 140 return -EINVAL; 141 142 mutex_lock(&uif->entity.lock); 143 144 state = vsp1_entity_get_state(&uif->entity, sd_state, sel->which); 145 if (!state) { 146 ret = -EINVAL; 147 goto done; 148 } 149 150 /* The crop rectangle must be inside the input frame. */ 151 format = v4l2_subdev_state_get_format(state, UIF_PAD_SINK); 152 153 sel->r.left = clamp_t(unsigned int, sel->r.left, 0, format->width - 1); 154 sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1); 155 sel->r.width = clamp_t(unsigned int, sel->r.width, UIF_MIN_SIZE, 156 format->width - sel->r.left); 157 sel->r.height = clamp_t(unsigned int, sel->r.height, UIF_MIN_SIZE, 158 format->height - sel->r.top); 159 160 /* Store the crop rectangle. */ 161 selection = v4l2_subdev_state_get_crop(state, sel->pad); 162 *selection = sel->r; 163 164 done: 165 mutex_unlock(&uif->entity.lock); 166 return ret; 167 } 168 169 /* ----------------------------------------------------------------------------- 170 * V4L2 Subdevice Operations 171 */ 172 173 static const struct v4l2_subdev_pad_ops uif_pad_ops = { 174 .enum_mbus_code = uif_enum_mbus_code, 175 .enum_frame_size = uif_enum_frame_size, 176 .get_fmt = vsp1_subdev_get_pad_format, 177 .set_fmt = uif_set_format, 178 .get_selection = uif_get_selection, 179 .set_selection = uif_set_selection, 180 }; 181 182 static const struct v4l2_subdev_ops uif_ops = { 183 .pad = &uif_pad_ops, 184 }; 185 186 /* ----------------------------------------------------------------------------- 187 * VSP1 Entity Operations 188 */ 189 190 static void uif_configure_stream(struct vsp1_entity *entity, 191 struct v4l2_subdev_state *state, 192 struct vsp1_pipeline *pipe, 193 struct vsp1_dl_list *dl, 194 struct vsp1_dl_body *dlb) 195 { 196 struct vsp1_uif *uif = to_uif(&entity->subdev); 197 const struct v4l2_rect *crop; 198 unsigned int left; 199 unsigned int width; 200 201 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMPMR, 202 VI6_UIF_DISCOM_DOCMPMR_SEL(9)); 203 204 crop = v4l2_subdev_state_get_crop(state, UIF_PAD_SINK); 205 206 left = crop->left; 207 width = crop->width; 208 209 /* On M3-W the horizontal coordinates are twice the register value. */ 210 if (uif->m3w_quirk) { 211 left /= 2; 212 width /= 2; 213 } 214 215 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPXR, left); 216 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPYR, crop->top); 217 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZXR, width); 218 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZYR, crop->height); 219 220 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMCR, 221 VI6_UIF_DISCOM_DOCMCR_CMPR); 222 } 223 224 static const struct vsp1_entity_operations uif_entity_ops = { 225 .configure_stream = uif_configure_stream, 226 }; 227 228 /* ----------------------------------------------------------------------------- 229 * Initialization and Cleanup 230 */ 231 232 static const struct soc_device_attribute vsp1_r8a7796[] = { 233 { .soc_id = "r8a7796" }, 234 { /* sentinel */ } 235 }; 236 237 struct vsp1_uif *vsp1_uif_create(struct vsp1_device *vsp1, unsigned int index) 238 { 239 struct vsp1_uif *uif; 240 char name[6]; 241 int ret; 242 243 uif = devm_kzalloc(vsp1->dev, sizeof(*uif), GFP_KERNEL); 244 if (!uif) 245 return ERR_PTR(-ENOMEM); 246 247 if (soc_device_match(vsp1_r8a7796)) 248 uif->m3w_quirk = true; 249 250 uif->entity.ops = &uif_entity_ops; 251 uif->entity.type = VSP1_ENTITY_UIF; 252 uif->entity.index = index; 253 254 /* The datasheet names the two UIF instances UIF4 and UIF5. */ 255 sprintf(name, "uif.%u", index + 4); 256 ret = vsp1_entity_init(vsp1, &uif->entity, name, 2, &uif_ops, 257 MEDIA_ENT_F_PROC_VIDEO_STATISTICS); 258 if (ret < 0) 259 return ERR_PTR(ret); 260 261 return uif; 262 } 263