drivers/media/platform/vsp1/vsp1_sru.c

   1 /*
   2  * vsp1_sru.c  --  R-Car VSP1 Super Resolution Unit
   3  *
   4  * Copyright (C) 2013 Renesas Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/device.h>
  15 #include <linux/gfp.h>
  16
  17 #include <media/v4l2-subdev.h>
  18
  19 #include "vsp1.h"
  20 #include "vsp1_dl.h"
  21 #include "vsp1_sru.h"
  22
  23 #define SRU_MIN_SIZE                            4U
  24 #define SRU_MAX_SIZE                            8190U
  25
  26 /* -----------------------------------------------------------------------------
  27  * Device Access
  28  */
  29
  30 static inline void vsp1_sru_write(struct vsp1_sru *sru, struct vsp1_dl_list *dl,
  31                                   u32 reg, u32 data)
  32 {
  33         vsp1_dl_list_write(dl, reg, data);
  34 }
  35
  36 /* -----------------------------------------------------------------------------
  37  * Controls
  38  */
  39
  40 #define V4L2_CID_VSP1_SRU_INTENSITY             (V4L2_CID_USER_BASE | 0x1001)
  41
  42 struct vsp1_sru_param {
  43         u32 ctrl0;
  44         u32 ctrl2;
  45 };
  46
  47 #define VI6_SRU_CTRL0_PARAMS(p0, p1)                    \
  48         (((p0) << VI6_SRU_CTRL0_PARAM0_SHIFT) |         \
  49          ((p1) << VI6_SRU_CTRL0_PARAM1_SHIFT))
  50
  51 #define VI6_SRU_CTRL2_PARAMS(p6, p7, p8)                \
  52         (((p6) << VI6_SRU_CTRL2_PARAM6_SHIFT) |         \
  53          ((p7) << VI6_SRU_CTRL2_PARAM7_SHIFT) |         \
  54          ((p8) << VI6_SRU_CTRL2_PARAM8_SHIFT))
  55
  56 static const struct vsp1_sru_param vsp1_sru_params[] = {
  57         {
  58                 .ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
  59                 .ctrl2 = VI6_SRU_CTRL2_PARAMS(24, 40, 255),
  60         }, {
  61                 .ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
  62                 .ctrl2 = VI6_SRU_CTRL2_PARAMS(8, 16, 255),
  63         }, {
  64                 .ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
  65                 .ctrl2 = VI6_SRU_CTRL2_PARAMS(36, 60, 255),
  66         }, {
  67                 .ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
  68                 .ctrl2 = VI6_SRU_CTRL2_PARAMS(12, 27, 255),
  69         }, {
  70                 .ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
  71                 .ctrl2 = VI6_SRU_CTRL2_PARAMS(48, 80, 255),
  72         }, {
  73                 .ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
  74                 .ctrl2 = VI6_SRU_CTRL2_PARAMS(16, 36, 255),
  75         },
  76 };
  77
  78 static int sru_s_ctrl(struct v4l2_ctrl *ctrl)
  79 {
  80         struct vsp1_sru *sru =
  81                 container_of(ctrl->handler, struct vsp1_sru, ctrls);
  82
  83         switch (ctrl->id) {
  84         case V4L2_CID_VSP1_SRU_INTENSITY:
  85                 sru->intensity = ctrl->val;
  86                 break;
  87         }
  88
  89         return 0;
  90 }
  91
  92 static const struct v4l2_ctrl_ops sru_ctrl_ops = {
  93         .s_ctrl = sru_s_ctrl,
  94 };
  95
  96 static const struct v4l2_ctrl_config sru_intensity_control = {
  97         .ops = &sru_ctrl_ops,
  98         .id = V4L2_CID_VSP1_SRU_INTENSITY,
  99         .name = "Intensity",
 100         .type = V4L2_CTRL_TYPE_INTEGER,
 101         .min = 1,
 102         .max = 6,
 103         .def = 1,
 104         .step = 1,
 105 };
 106
 107 /* -----------------------------------------------------------------------------
 108  * V4L2 Subdevice Operations
 109  */
 110
 111 static int sru_enum_mbus_code(struct v4l2_subdev *subdev,
 112                               struct v4l2_subdev_pad_config *cfg,
 113                               struct v4l2_subdev_mbus_code_enum *code)
 114 {
 115         static const unsigned int codes[] = {
 116                 MEDIA_BUS_FMT_ARGB8888_1X32,
 117                 MEDIA_BUS_FMT_AYUV8_1X32,
 118         };
 119
 120         return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
 121                                           ARRAY_SIZE(codes));
 122 }
 123
 124 static int sru_enum_frame_size(struct v4l2_subdev *subdev,
 125                                struct v4l2_subdev_pad_config *cfg,
 126                                struct v4l2_subdev_frame_size_enum *fse)
 127 {
 128         struct vsp1_sru *sru = to_sru(subdev);
 129         struct v4l2_subdev_pad_config *config;
 130         struct v4l2_mbus_framefmt *format;
 131         int ret = 0;
 132
 133         config = vsp1_entity_get_pad_config(&sru->entity, cfg, fse->which);
 134         if (!config)
 135                 return -EINVAL;
 136
 137         format = vsp1_entity_get_pad_format(&sru->entity, config, SRU_PAD_SINK);
 138
 139         mutex_lock(&sru->entity.lock);
 140
 141         if (fse->index || fse->code != format->code) {
 142                 ret = -EINVAL;
 143                 goto done;
 144         }
 145
 146         if (fse->pad == SRU_PAD_SINK) {
 147                 fse->min_width = SRU_MIN_SIZE;
 148                 fse->max_width = SRU_MAX_SIZE;
 149                 fse->min_height = SRU_MIN_SIZE;
 150                 fse->max_height = SRU_MAX_SIZE;
 151         } else {
 152                 fse->min_width = format->width;
 153                 fse->min_height = format->height;
 154                 if (format->width <= SRU_MAX_SIZE / 2 &&
 155                     format->height <= SRU_MAX_SIZE / 2) {
 156                         fse->max_width = format->width * 2;
 157                         fse->max_height = format->height * 2;
 158                 } else {
 159                         fse->max_width = format->width;
 160                         fse->max_height = format->height;
 161                 }
 162         }
 163
 164 done:
 165         mutex_unlock(&sru->entity.lock);
 166         return ret;
 167 }
 168
 169 static void sru_try_format(struct vsp1_sru *sru,
 170                            struct v4l2_subdev_pad_config *config,
 171                            unsigned int pad, struct v4l2_mbus_framefmt *fmt)
 172 {
 173         struct v4l2_mbus_framefmt *format;
 174         unsigned int input_area;
 175         unsigned int output_area;
 176
 177         switch (pad) {
 178         case SRU_PAD_SINK:
 179                 /* Default to YUV if the requested format is not supported. */
 180                 if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
 181                     fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
 182                         fmt->code = MEDIA_BUS_FMT_AYUV8_1X32;
 183
 184                 fmt->width = clamp(fmt->width, SRU_MIN_SIZE, SRU_MAX_SIZE);
 185                 fmt->height = clamp(fmt->height, SRU_MIN_SIZE, SRU_MAX_SIZE);
 186                 break;
 187
 188         case SRU_PAD_SOURCE:
 189                 /* The SRU can't perform format conversion. */
 190                 format = vsp1_entity_get_pad_format(&sru->entity, config,
 191                                                     SRU_PAD_SINK);
 192                 fmt->code = format->code;
 193
 194                 /* We can upscale by 2 in both direction, but not independently.
 195                  * Compare the input and output rectangles areas (avoiding
 196                  * integer overflows on the output): if the requested output
 197                  * area is larger than 1.5^2 the input area upscale by two,
 198                  * otherwise don't scale.
 199                  */
 200                 input_area = format->width * format->height;
 201                 output_area = min(fmt->width, SRU_MAX_SIZE)
 202                             * min(fmt->height, SRU_MAX_SIZE);
 203
 204                 if (fmt->width <= SRU_MAX_SIZE / 2 &&
 205                     fmt->height <= SRU_MAX_SIZE / 2 &&
 206                     output_area > input_area * 9 / 4) {
 207                         fmt->width = format->width * 2;
 208                         fmt->height = format->height * 2;
 209                 } else {
 210                         fmt->width = format->width;
 211                         fmt->height = format->height;
 212                 }
 213                 break;
 214         }
 215
 216         fmt->field = V4L2_FIELD_NONE;
 217         fmt->colorspace = V4L2_COLORSPACE_SRGB;
 218 }
 219
 220 static int sru_set_format(struct v4l2_subdev *subdev,
 221                           struct v4l2_subdev_pad_config *cfg,
 222                           struct v4l2_subdev_format *fmt)
 223 {
 224         struct vsp1_sru *sru = to_sru(subdev);
 225         struct v4l2_subdev_pad_config *config;
 226         struct v4l2_mbus_framefmt *format;
 227         int ret = 0;
 228
 229         mutex_lock(&sru->entity.lock);
 230
 231         config = vsp1_entity_get_pad_config(&sru->entity, cfg, fmt->which);
 232         if (!config) {
 233                 ret = -EINVAL;
 234                 goto done;
 235         }
 236
 237         sru_try_format(sru, config, fmt->pad, &fmt->format);
 238
 239         format = vsp1_entity_get_pad_format(&sru->entity, config, fmt->pad);
 240         *format = fmt->format;
 241
 242         if (fmt->pad == SRU_PAD_SINK) {
 243                 /* Propagate the format to the source pad. */
 244                 format = vsp1_entity_get_pad_format(&sru->entity, config,
 245                                                     SRU_PAD_SOURCE);
 246                 *format = fmt->format;
 247
 248                 sru_try_format(sru, config, SRU_PAD_SOURCE, format);
 249         }
 250
 251 done:
 252         mutex_unlock(&sru->entity.lock);
 253         return ret;
 254 }
 255
 256 static const struct v4l2_subdev_pad_ops sru_pad_ops = {
 257         .init_cfg = vsp1_entity_init_cfg,
 258         .enum_mbus_code = sru_enum_mbus_code,
 259         .enum_frame_size = sru_enum_frame_size,
 260         .get_fmt = vsp1_subdev_get_pad_format,
 261         .set_fmt = sru_set_format,
 262 };
 263
 264 static const struct v4l2_subdev_ops sru_ops = {
 265         .pad    = &sru_pad_ops,
 266 };
 267
 268 /* -----------------------------------------------------------------------------
 269  * VSP1 Entity Operations
 270  */
 271
 272 static void sru_configure(struct vsp1_entity *entity,
 273                           struct vsp1_pipeline *pipe,
 274                           struct vsp1_dl_list *dl,
 275                           enum vsp1_entity_params params)
 276 {
 277         const struct vsp1_sru_param *param;
 278         struct vsp1_sru *sru = to_sru(&entity->subdev);
 279         struct v4l2_mbus_framefmt *input;
 280         struct v4l2_mbus_framefmt *output;
 281         u32 ctrl0;
 282
 283         if (params != VSP1_ENTITY_PARAMS_INIT)
 284                 return;
 285
 286         input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
 287                                            SRU_PAD_SINK);
 288         output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
 289                                             SRU_PAD_SOURCE);
 290
 291         if (input->code == MEDIA_BUS_FMT_ARGB8888_1X32)
 292                 ctrl0 = VI6_SRU_CTRL0_PARAM2 | VI6_SRU_CTRL0_PARAM3
 293                       | VI6_SRU_CTRL0_PARAM4;
 294         else
 295                 ctrl0 = VI6_SRU_CTRL0_PARAM3;
 296
 297         if (input->width != output->width)
 298                 ctrl0 |= VI6_SRU_CTRL0_MODE_UPSCALE;
 299
 300         param = &vsp1_sru_params[sru->intensity - 1];
 301
 302         ctrl0 |= param->ctrl0;
 303
 304         vsp1_sru_write(sru, dl, VI6_SRU_CTRL0, ctrl0);
 305         vsp1_sru_write(sru, dl, VI6_SRU_CTRL1, VI6_SRU_CTRL1_PARAM5);
 306         vsp1_sru_write(sru, dl, VI6_SRU_CTRL2, param->ctrl2);
 307 }
 308
 309 static unsigned int sru_max_width(struct vsp1_entity *entity,
 310                                   struct vsp1_pipeline *pipe)
 311 {
 312         struct vsp1_sru *sru = to_sru(&entity->subdev);
 313         struct v4l2_mbus_framefmt *input;
 314         struct v4l2_mbus_framefmt *output;
 315
 316         input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
 317                                            SRU_PAD_SINK);
 318         output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
 319                                             SRU_PAD_SOURCE);
 320
 321         if (input->width != output->width)
 322                 return 512;
 323         else
 324                 return 256;
 325 }
 326
 327 static const struct vsp1_entity_operations sru_entity_ops = {
 328         .configure = sru_configure,
 329         .max_width = sru_max_width,
 330 };
 331
 332 /* -----------------------------------------------------------------------------
 333  * Initialization and Cleanup
 334  */
 335
 336 struct vsp1_sru *vsp1_sru_create(struct vsp1_device *vsp1)
 337 {
 338         struct vsp1_sru *sru;
 339         int ret;
 340
 341         sru = devm_kzalloc(vsp1->dev, sizeof(*sru), GFP_KERNEL);
 342         if (sru == NULL)
 343                 return ERR_PTR(-ENOMEM);
 344
 345         sru->entity.ops = &sru_entity_ops;
 346         sru->entity.type = VSP1_ENTITY_SRU;
 347
 348         ret = vsp1_entity_init(vsp1, &sru->entity, "sru", 2, &sru_ops,
 349                                MEDIA_ENT_F_PROC_VIDEO_SCALER);
 350         if (ret < 0)
 351                 return ERR_PTR(ret);
 352
 353         /* Initialize the control handler. */
 354         v4l2_ctrl_handler_init(&sru->ctrls, 1);
 355         v4l2_ctrl_new_custom(&sru->ctrls, &sru_intensity_control, NULL);
 356
 357         sru->intensity = 1;
 358
 359         sru->entity.subdev.ctrl_handler = &sru->ctrls;
 360
 361         if (sru->ctrls.error) {
 362                 dev_err(vsp1->dev, "sru: failed to initialize controls\n");
 363                 ret = sru->ctrls.error;
 364                 vsp1_entity_destroy(&sru->entity);
 365                 return ERR_PTR(ret);
 366         }
 367
 368         return sru;
 369 }