drivers/media/platform/vsp1/vsp1_clu.c

   1 /*
   2  * vsp1_clu.c  --  R-Car VSP1 Cubic Look-Up Table
   3  *
   4  * Copyright (C) 2015-2016 Renesas Electronics 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/slab.h>
  16
  17 #include <media/v4l2-subdev.h>
  18
  19 #include "vsp1.h"
  20 #include "vsp1_clu.h"
  21 #include "vsp1_dl.h"
  22
  23 #define CLU_MIN_SIZE                            4U
  24 #define CLU_MAX_SIZE                            8190U
  25
  26 /* -----------------------------------------------------------------------------
  27  * Device Access
  28  */
  29
  30 static inline void vsp1_clu_write(struct vsp1_clu *clu, 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_CLU_TABLE                 (V4L2_CID_USER_BASE | 0x1001)
  41 #define V4L2_CID_VSP1_CLU_MODE                  (V4L2_CID_USER_BASE | 0x1002)
  42 #define V4L2_CID_VSP1_CLU_MODE_2D               0
  43 #define V4L2_CID_VSP1_CLU_MODE_3D               1
  44
  45 static int clu_set_table(struct vsp1_clu *clu, struct v4l2_ctrl *ctrl)
  46 {
  47         struct vsp1_dl_body *dlb;
  48         unsigned int i;
  49
  50         dlb = vsp1_dl_fragment_alloc(clu->entity.vsp1, 1 + 17 * 17 * 17);
  51         if (!dlb)
  52                 return -ENOMEM;
  53
  54         vsp1_dl_fragment_write(dlb, VI6_CLU_ADDR, 0);
  55         for (i = 0; i < 17 * 17 * 17; ++i)
  56                 vsp1_dl_fragment_write(dlb, VI6_CLU_DATA, ctrl->p_new.p_u32[i]);
  57
  58         swap(clu->clu, dlb);
  59
  60         vsp1_dl_fragment_free(dlb);
  61         return 0;
  62 }
  63
  64 static int clu_s_ctrl(struct v4l2_ctrl *ctrl)
  65 {
  66         struct vsp1_clu *clu =
  67                 container_of(ctrl->handler, struct vsp1_clu, ctrls);
  68
  69         switch (ctrl->id) {
  70         case V4L2_CID_VSP1_CLU_TABLE:
  71                 clu_set_table(clu, ctrl);
  72                 break;
  73
  74         case V4L2_CID_VSP1_CLU_MODE:
  75                 clu->mode = ctrl->val;
  76                 break;
  77         }
  78
  79         return 0;
  80 }
  81
  82 static const struct v4l2_ctrl_ops clu_ctrl_ops = {
  83         .s_ctrl = clu_s_ctrl,
  84 };
  85
  86 static const struct v4l2_ctrl_config clu_table_control = {
  87         .ops = &clu_ctrl_ops,
  88         .id = V4L2_CID_VSP1_CLU_TABLE,
  89         .name = "Look-Up Table",
  90         .type = V4L2_CTRL_TYPE_U32,
  91         .min = 0x00000000,
  92         .max = 0x00ffffff,
  93         .step = 1,
  94         .def = 0,
  95         .dims = { 17, 17, 17 },
  96 };
  97
  98 static const char * const clu_mode_menu[] = {
  99         "2D",
 100         "3D",
 101         NULL,
 102 };
 103
 104 static const struct v4l2_ctrl_config clu_mode_control = {
 105         .ops = &clu_ctrl_ops,
 106         .id = V4L2_CID_VSP1_CLU_MODE,
 107         .name = "Mode",
 108         .type = V4L2_CTRL_TYPE_MENU,
 109         .min = 0,
 110         .max = 1,
 111         .def = 1,
 112         .qmenu = clu_mode_menu,
 113 };
 114
 115 /* -----------------------------------------------------------------------------
 116  * V4L2 Subdevice Pad Operations
 117  */
 118
 119 static int clu_enum_mbus_code(struct v4l2_subdev *subdev,
 120                               struct v4l2_subdev_pad_config *cfg,
 121                               struct v4l2_subdev_mbus_code_enum *code)
 122 {
 123         static const unsigned int codes[] = {
 124                 MEDIA_BUS_FMT_ARGB8888_1X32,
 125                 MEDIA_BUS_FMT_AHSV8888_1X32,
 126                 MEDIA_BUS_FMT_AYUV8_1X32,
 127         };
 128
 129         return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
 130                                           ARRAY_SIZE(codes));
 131 }
 132
 133 static int clu_enum_frame_size(struct v4l2_subdev *subdev,
 134                                struct v4l2_subdev_pad_config *cfg,
 135                                struct v4l2_subdev_frame_size_enum *fse)
 136 {
 137         return vsp1_subdev_enum_frame_size(subdev, cfg, fse, CLU_MIN_SIZE,
 138                                            CLU_MIN_SIZE, CLU_MAX_SIZE,
 139                                            CLU_MAX_SIZE);
 140 }
 141
 142 static int clu_set_format(struct v4l2_subdev *subdev,
 143                           struct v4l2_subdev_pad_config *cfg,
 144                           struct v4l2_subdev_format *fmt)
 145 {
 146         struct vsp1_clu *clu = to_clu(subdev);
 147         struct v4l2_subdev_pad_config *config;
 148         struct v4l2_mbus_framefmt *format;
 149
 150         config = vsp1_entity_get_pad_config(&clu->entity, cfg, fmt->which);
 151         if (!config)
 152                 return -EINVAL;
 153
 154         /* Default to YUV if the requested format is not supported. */
 155         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
 156             fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 &&
 157             fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
 158                 fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
 159
 160         format = vsp1_entity_get_pad_format(&clu->entity, config, fmt->pad);
 161
 162         if (fmt->pad == CLU_PAD_SOURCE) {
 163                 /* The CLU output format can't be modified. */
 164                 fmt->format = *format;
 165                 return 0;
 166         }
 167
 168         format->code = fmt->format.code;
 169         format->width = clamp_t(unsigned int, fmt->format.width,
 170                                 CLU_MIN_SIZE, CLU_MAX_SIZE);
 171         format->height = clamp_t(unsigned int, fmt->format.height,
 172                                  CLU_MIN_SIZE, CLU_MAX_SIZE);
 173         format->field = V4L2_FIELD_NONE;
 174         format->colorspace = V4L2_COLORSPACE_SRGB;
 175
 176         fmt->format = *format;
 177
 178         /* Propagate the format to the source pad. */
 179         format = vsp1_entity_get_pad_format(&clu->entity, config,
 180                                             CLU_PAD_SOURCE);
 181         *format = fmt->format;
 182
 183         return 0;
 184 }
 185
 186 /* -----------------------------------------------------------------------------
 187  * V4L2 Subdevice Operations
 188  */
 189
 190 static const struct v4l2_subdev_pad_ops clu_pad_ops = {
 191         .init_cfg = vsp1_entity_init_cfg,
 192         .enum_mbus_code = clu_enum_mbus_code,
 193         .enum_frame_size = clu_enum_frame_size,
 194         .get_fmt = vsp1_subdev_get_pad_format,
 195         .set_fmt = clu_set_format,
 196 };
 197
 198 static const struct v4l2_subdev_ops clu_ops = {
 199         .pad    = &clu_pad_ops,
 200 };
 201
 202 /* -----------------------------------------------------------------------------
 203  * VSP1 Entity Operations
 204  */
 205
 206 static void clu_configure(struct vsp1_entity *entity,
 207                           struct vsp1_pipeline *pipe,
 208                           struct vsp1_dl_list *dl)
 209 {
 210         struct vsp1_clu *clu = to_clu(&entity->subdev);
 211         struct v4l2_mbus_framefmt *format;
 212         u32 ctrl = VI6_CLU_CTRL_AAI | VI6_CLU_CTRL_MVS | VI6_CLU_CTRL_EN;
 213
 214         format = vsp1_entity_get_pad_format(&clu->entity, clu->entity.config,
 215                                             CLU_PAD_SINK);
 216
 217         mutex_lock(clu->ctrls.lock);
 218
 219         /* 2D mode can only be used with the YCbCr pixel encoding. */
 220         if (clu->mode == V4L2_CID_VSP1_CLU_MODE_2D &&
 221             format->code == MEDIA_BUS_FMT_AYUV8_1X32)
 222                 ctrl |= VI6_CLU_CTRL_AX1I_2D | VI6_CLU_CTRL_AX2I_2D
 223                      |  VI6_CLU_CTRL_OS0_2D | VI6_CLU_CTRL_OS1_2D
 224                      |  VI6_CLU_CTRL_OS2_2D | VI6_CLU_CTRL_M2D;
 225
 226         if (clu->clu) {
 227                 vsp1_dl_list_add_fragment(dl, clu->clu);
 228                 clu->clu = NULL;
 229         }
 230
 231         mutex_unlock(clu->ctrls.lock);
 232
 233         vsp1_clu_write(clu, dl, VI6_CLU_CTRL, ctrl);
 234 }
 235
 236 static const struct vsp1_entity_operations clu_entity_ops = {
 237         .configure = clu_configure,
 238 };
 239
 240 /* -----------------------------------------------------------------------------
 241  * Initialization and Cleanup
 242  */
 243
 244 struct vsp1_clu *vsp1_clu_create(struct vsp1_device *vsp1)
 245 {
 246         struct vsp1_clu *clu;
 247         int ret;
 248
 249         clu = devm_kzalloc(vsp1->dev, sizeof(*clu), GFP_KERNEL);
 250         if (clu == NULL)
 251                 return ERR_PTR(-ENOMEM);
 252
 253         clu->entity.ops = &clu_entity_ops;
 254         clu->entity.type = VSP1_ENTITY_CLU;
 255
 256         ret = vsp1_entity_init(vsp1, &clu->entity, "clu", 2, &clu_ops,
 257                                MEDIA_ENT_F_PROC_VIDEO_LUT);
 258         if (ret < 0)
 259                 return ERR_PTR(ret);
 260
 261         /* Initialize the control handler. */
 262         v4l2_ctrl_handler_init(&clu->ctrls, 2);
 263         v4l2_ctrl_new_custom(&clu->ctrls, &clu_table_control, NULL);
 264         v4l2_ctrl_new_custom(&clu->ctrls, &clu_mode_control, NULL);
 265
 266         clu->entity.subdev.ctrl_handler = &clu->ctrls;
 267
 268         if (clu->ctrls.error) {
 269                 dev_err(vsp1->dev, "clu: failed to initialize controls\n");
 270                 ret = clu->ctrls.error;
 271                 vsp1_entity_destroy(&clu->entity);
 272                 return ERR_PTR(ret);
 273         }
 274
 275         v4l2_ctrl_handler_setup(&clu->ctrls);
 276
 277         return clu;
 278 }