drivers/media/platform/vsp1/vsp1_uif.c

   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_pad_config *cfg,
  58                               struct v4l2_subdev_mbus_code_enum *code)
  59 {
  60         return vsp1_subdev_enum_mbus_code(subdev, cfg, 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_pad_config *cfg,
  66                                struct v4l2_subdev_frame_size_enum *fse)
  67 {
  68         return vsp1_subdev_enum_frame_size(subdev, cfg, fse, UIF_MIN_SIZE,
  69                                            UIF_MIN_SIZE, UIF_MAX_SIZE,
  70                                            UIF_MAX_SIZE);
  71 }
  72
  73 static int uif_set_format(struct v4l2_subdev *subdev,
  74                             struct v4l2_subdev_pad_config *cfg,
  75                             struct v4l2_subdev_format *fmt)
  76 {
  77         return vsp1_subdev_set_pad_format(subdev, cfg, fmt, uif_codes,
  78                                           ARRAY_SIZE(uif_codes),
  79                                           UIF_MIN_SIZE, UIF_MIN_SIZE,
  80                                           UIF_MAX_SIZE, UIF_MAX_SIZE);
  81 }
  82
  83 static int uif_get_selection(struct v4l2_subdev *subdev,
  84                              struct v4l2_subdev_pad_config *cfg,
  85                              struct v4l2_subdev_selection *sel)
  86 {
  87         struct vsp1_uif *uif = to_uif(subdev);
  88         struct v4l2_subdev_pad_config *config;
  89         struct v4l2_mbus_framefmt *format;
  90         int ret = 0;
  91
  92         if (sel->pad != UIF_PAD_SINK)
  93                 return -EINVAL;
  94
  95         mutex_lock(&uif->entity.lock);
  96
  97         config = vsp1_entity_get_pad_config(&uif->entity, cfg, sel->which);
  98         if (!config) {
  99                 ret = -EINVAL;
 100                 goto done;
 101         }
 102
 103         switch (sel->target) {
 104         case V4L2_SEL_TGT_CROP_BOUNDS:
 105         case V4L2_SEL_TGT_CROP_DEFAULT:
 106                 format = vsp1_entity_get_pad_format(&uif->entity, config,
 107                                                     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 = *vsp1_entity_get_pad_selection(&uif->entity, config,
 116                                                         sel->pad, sel->target);
 117                 break;
 118
 119         default:
 120                 ret = -EINVAL;
 121                 break;
 122         }
 123
 124 done:
 125         mutex_unlock(&uif->entity.lock);
 126         return ret;
 127 }
 128
 129 static int uif_set_selection(struct v4l2_subdev *subdev,
 130                              struct v4l2_subdev_pad_config *cfg,
 131                              struct v4l2_subdev_selection *sel)
 132 {
 133         struct vsp1_uif *uif = to_uif(subdev);
 134         struct v4l2_subdev_pad_config *config;
 135         struct v4l2_mbus_framefmt *format;
 136         struct v4l2_rect *selection;
 137         int ret = 0;
 138
 139         if (sel->pad != UIF_PAD_SINK ||
 140             sel->target != V4L2_SEL_TGT_CROP)
 141                 return -EINVAL;
 142
 143         mutex_lock(&uif->entity.lock);
 144
 145         config = vsp1_entity_get_pad_config(&uif->entity, cfg, sel->which);
 146         if (!config) {
 147                 ret = -EINVAL;
 148                 goto done;
 149         }
 150
 151         /* The crop rectangle must be inside the input frame. */
 152         format = vsp1_entity_get_pad_format(&uif->entity, config, UIF_PAD_SINK);
 153
 154         sel->r.left = clamp_t(unsigned int, sel->r.left, 0, format->width - 1);
 155         sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1);
 156         sel->r.width = clamp_t(unsigned int, sel->r.width, UIF_MIN_SIZE,
 157                                format->width - sel->r.left);
 158         sel->r.height = clamp_t(unsigned int, sel->r.height, UIF_MIN_SIZE,
 159                                 format->height - sel->r.top);
 160
 161         /* Store the crop rectangle. */
 162         selection = vsp1_entity_get_pad_selection(&uif->entity, config,
 163                                                   sel->pad, V4L2_SEL_TGT_CROP);
 164         *selection = sel->r;
 165
 166 done:
 167         mutex_unlock(&uif->entity.lock);
 168         return ret;
 169 }
 170
 171 /* -----------------------------------------------------------------------------
 172  * V4L2 Subdevice Operations
 173  */
 174
 175 static const struct v4l2_subdev_pad_ops uif_pad_ops = {
 176         .init_cfg = vsp1_entity_init_cfg,
 177         .enum_mbus_code = uif_enum_mbus_code,
 178         .enum_frame_size = uif_enum_frame_size,
 179         .get_fmt = vsp1_subdev_get_pad_format,
 180         .set_fmt = uif_set_format,
 181         .get_selection = uif_get_selection,
 182         .set_selection = uif_set_selection,
 183 };
 184
 185 static const struct v4l2_subdev_ops uif_ops = {
 186         .pad    = &uif_pad_ops,
 187 };
 188
 189 /* -----------------------------------------------------------------------------
 190  * VSP1 Entity Operations
 191  */
 192
 193 static void uif_configure_stream(struct vsp1_entity *entity,
 194                                  struct vsp1_pipeline *pipe,
 195                                  struct vsp1_dl_body *dlb)
 196 {
 197         struct vsp1_uif *uif = to_uif(&entity->subdev);
 198         const struct v4l2_rect *crop;
 199         unsigned int left;
 200         unsigned int width;
 201
 202         vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMPMR,
 203                        VI6_UIF_DISCOM_DOCMPMR_SEL(9));
 204
 205         crop = vsp1_entity_get_pad_selection(entity, entity->config,
 206                                              UIF_PAD_SINK, V4L2_SEL_TGT_CROP);
 207
 208         left = crop->left;
 209         width = crop->width;
 210
 211         /* On M3-W the horizontal coordinates are twice the register value. */
 212         if (uif->m3w_quirk) {
 213                 left /= 2;
 214                 width /= 2;
 215         }
 216
 217         vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPXR, left);
 218         vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPYR, crop->top);
 219         vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZXR, width);
 220         vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZYR, crop->height);
 221
 222         vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMCR,
 223                        VI6_UIF_DISCOM_DOCMCR_CMPR);
 224 }
 225
 226 static const struct vsp1_entity_operations uif_entity_ops = {
 227         .configure_stream = uif_configure_stream,
 228 };
 229
 230 /* -----------------------------------------------------------------------------
 231  * Initialization and Cleanup
 232  */
 233
 234 static const struct soc_device_attribute vsp1_r8a7796[] = {
 235         { .soc_id = "r8a7796" },
 236         { /* sentinel */ }
 237 };
 238
 239 struct vsp1_uif *vsp1_uif_create(struct vsp1_device *vsp1, unsigned int index)
 240 {
 241         struct vsp1_uif *uif;
 242         char name[6];
 243         int ret;
 244
 245         uif = devm_kzalloc(vsp1->dev, sizeof(*uif), GFP_KERNEL);
 246         if (!uif)
 247                 return ERR_PTR(-ENOMEM);
 248
 249         if (soc_device_match(vsp1_r8a7796))
 250                 uif->m3w_quirk = true;
 251
 252         uif->entity.ops = &uif_entity_ops;
 253         uif->entity.type = VSP1_ENTITY_UIF;
 254         uif->entity.index = index;
 255
 256         /* The datasheet names the two UIF instances UIF4 and UIF5. */
 257         sprintf(name, "uif.%u", index + 4);
 258         ret = vsp1_entity_init(vsp1, &uif->entity, name, 2, &uif_ops,
 259                                MEDIA_ENT_F_PROC_VIDEO_STATISTICS);
 260         if (ret < 0)
 261                 return ERR_PTR(ret);
 262
 263         return uif;
 264 }