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         spin_lock_irq(&clu->lock);
  59         swap(clu->clu, dlb);
  60         spin_unlock_irq(&clu->lock);
  61
  62         vsp1_dl_fragment_free(dlb);
  63         return 0;
  64 }
  65
  66 static int clu_s_ctrl(struct v4l2_ctrl *ctrl)
  67 {
  68         struct vsp1_clu *clu =
  69                 container_of(ctrl->handler, struct vsp1_clu, ctrls);
  70
  71         switch (ctrl->id) {
  72         case V4L2_CID_VSP1_CLU_TABLE:
  73                 clu_set_table(clu, ctrl);
  74                 break;
  75
  76         case V4L2_CID_VSP1_CLU_MODE:
  77                 clu->mode = ctrl->val;
  78                 break;
  79         }
  80
  81         return 0;
  82 }
  83
  84 static const struct v4l2_ctrl_ops clu_ctrl_ops = {
  85         .s_ctrl = clu_s_ctrl,
  86 };
  87
  88 static const struct v4l2_ctrl_config clu_table_control = {
  89         .ops = &clu_ctrl_ops,
  90         .id = V4L2_CID_VSP1_CLU_TABLE,
  91         .name = "Look-Up Table",
  92         .type = V4L2_CTRL_TYPE_U32,
  93         .min = 0x00000000,
  94         .max = 0x00ffffff,
  95         .step = 1,
  96         .def = 0,
  97         .dims = { 17, 17, 17 },
  98 };
  99
 100 static const char * const clu_mode_menu[] = {
 101         "2D",
 102         "3D",
 103         NULL,
 104 };
 105
 106 static const struct v4l2_ctrl_config clu_mode_control = {
 107         .ops = &clu_ctrl_ops,
 108         .id = V4L2_CID_VSP1_CLU_MODE,
 109         .name = "Mode",
 110         .type = V4L2_CTRL_TYPE_MENU,
 111         .min = 0,
 112         .max = 1,
 113         .def = 1,
 114         .qmenu = clu_mode_menu,
 115 };
 116
 117 /* -----------------------------------------------------------------------------
 118  * V4L2 Subdevice Pad Operations
 119  */
 120
 121 static int clu_enum_mbus_code(struct v4l2_subdev *subdev,
 122                               struct v4l2_subdev_pad_config *cfg,
 123                               struct v4l2_subdev_mbus_code_enum *code)
 124 {
 125         static const unsigned int codes[] = {
 126                 MEDIA_BUS_FMT_ARGB8888_1X32,
 127                 MEDIA_BUS_FMT_AHSV8888_1X32,
 128                 MEDIA_BUS_FMT_AYUV8_1X32,
 129         };
 130
 131         return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
 132                                           ARRAY_SIZE(codes));
 133 }
 134
 135 static int clu_enum_frame_size(struct v4l2_subdev *subdev,
 136                                struct v4l2_subdev_pad_config *cfg,
 137                                struct v4l2_subdev_frame_size_enum *fse)
 138 {
 139         return vsp1_subdev_enum_frame_size(subdev, cfg, fse, CLU_MIN_SIZE,
 140                                            CLU_MIN_SIZE, CLU_MAX_SIZE,
 141                                            CLU_MAX_SIZE);
 142 }
 143
 144 static int clu_set_format(struct v4l2_subdev *subdev,
 145                           struct v4l2_subdev_pad_config *cfg,
 146                           struct v4l2_subdev_format *fmt)
 147 {
 148         struct vsp1_clu *clu = to_clu(subdev);
 149         struct v4l2_subdev_pad_config *config;
 150         struct v4l2_mbus_framefmt *format;
 151
 152         config = vsp1_entity_get_pad_config(&clu->entity, cfg, fmt->which);
 153         if (!config)
 154                 return -EINVAL;
 155
 156         /* Default to YUV if the requested format is not supported. */
 157         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
 158             fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 &&
 159             fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
 160                 fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
 161
 162         format = vsp1_entity_get_pad_format(&clu->entity, config, fmt->pad);
 163
 164         if (fmt->pad == CLU_PAD_SOURCE) {
 165                 /* The CLU output format can't be modified. */
 166                 fmt->format = *format;
 167                 return 0;
 168         }
 169
 170         format->code = fmt->format.code;
 171         format->width = clamp_t(unsigned int, fmt->format.width,
 172                                 CLU_MIN_SIZE, CLU_MAX_SIZE);
 173         format->height = clamp_t(unsigned int, fmt->format.height,
 174                                  CLU_MIN_SIZE, CLU_MAX_SIZE);
 175         format->field = V4L2_FIELD_NONE;
 176         format->colorspace = V4L2_COLORSPACE_SRGB;
 177
 178         fmt->format = *format;
 179
 180         /* Propagate the format to the source pad. */
 181         format = vsp1_entity_get_pad_format(&clu->entity, config,
 182                                             CLU_PAD_SOURCE);
 183         *format = fmt->format;
 184
 185         return 0;
 186 }
 187
 188 /* -----------------------------------------------------------------------------
 189  * V4L2 Subdevice Operations
 190  */
 191
 192 static const struct v4l2_subdev_pad_ops clu_pad_ops = {
 193         .init_cfg = vsp1_entity_init_cfg,
 194         .enum_mbus_code = clu_enum_mbus_code,
 195         .enum_frame_size = clu_enum_frame_size,
 196         .get_fmt = vsp1_subdev_get_pad_format,
 197         .set_fmt = clu_set_format,
 198 };
 199
 200 static const struct v4l2_subdev_ops clu_ops = {
 201         .pad    = &clu_pad_ops,
 202 };
 203
 204 /* -----------------------------------------------------------------------------
 205  * VSP1 Entity Operations
 206  */
 207
 208 static void clu_configure(struct vsp1_entity *entity,
 209                           struct vsp1_pipeline *pipe,
 210                           struct vsp1_dl_list *dl, bool full)
 211 {
 212         struct vsp1_clu *clu = to_clu(&entity->subdev);
 213         struct vsp1_dl_body *dlb;
 214         unsigned long flags;
 215         u32 ctrl = VI6_CLU_CTRL_AAI | VI6_CLU_CTRL_MVS | VI6_CLU_CTRL_EN;
 216
 217         /* The format can't be changed during streaming, only verify it at
 218          * stream start and store the information internally for future partial
 219          * reconfiguration calls.
 220          */
 221         if (full) {
 222                 struct v4l2_mbus_framefmt *format;
 223
 224                 format = vsp1_entity_get_pad_format(&clu->entity,
 225                                                     clu->entity.config,
 226                                                     CLU_PAD_SINK);
 227                 clu->yuv_mode = format->code == MEDIA_BUS_FMT_AYUV8_1X32;
 228                 return;
 229         }
 230
 231         /* 2D mode can only be used with the YCbCr pixel encoding. */
 232         if (clu->mode == V4L2_CID_VSP1_CLU_MODE_2D && clu->yuv_mode)
 233                 ctrl |= VI6_CLU_CTRL_AX1I_2D | VI6_CLU_CTRL_AX2I_2D
 234                      |  VI6_CLU_CTRL_OS0_2D | VI6_CLU_CTRL_OS1_2D
 235                      |  VI6_CLU_CTRL_OS2_2D | VI6_CLU_CTRL_M2D;
 236
 237         vsp1_clu_write(clu, dl, VI6_CLU_CTRL, ctrl);
 238
 239         spin_lock_irqsave(&clu->lock, flags);
 240         dlb = clu->clu;
 241         clu->clu = NULL;
 242         spin_unlock_irqrestore(&clu->lock, flags);
 243
 244         if (dlb)
 245                 vsp1_dl_list_add_fragment(dl, dlb);
 246 }
 247
 248 static const struct vsp1_entity_operations clu_entity_ops = {
 249         .configure = clu_configure,
 250 };
 251
 252 /* -----------------------------------------------------------------------------
 253  * Initialization and Cleanup
 254  */
 255
 256 struct vsp1_clu *vsp1_clu_create(struct vsp1_device *vsp1)
 257 {
 258         struct vsp1_clu *clu;
 259         int ret;
 260
 261         clu = devm_kzalloc(vsp1->dev, sizeof(*clu), GFP_KERNEL);
 262         if (clu == NULL)
 263                 return ERR_PTR(-ENOMEM);
 264
 265         spin_lock_init(&clu->lock);
 266
 267         clu->entity.ops = &clu_entity_ops;
 268         clu->entity.type = VSP1_ENTITY_CLU;
 269
 270         ret = vsp1_entity_init(vsp1, &clu->entity, "clu", 2, &clu_ops,
 271                                MEDIA_ENT_F_PROC_VIDEO_LUT);
 272         if (ret < 0)
 273                 return ERR_PTR(ret);
 274
 275         /* Initialize the control handler. */
 276         v4l2_ctrl_handler_init(&clu->ctrls, 2);
 277         v4l2_ctrl_new_custom(&clu->ctrls, &clu_table_control, NULL);
 278         v4l2_ctrl_new_custom(&clu->ctrls, &clu_mode_control, NULL);
 279
 280         clu->entity.subdev.ctrl_handler = &clu->ctrls;
 281
 282         if (clu->ctrls.error) {
 283                 dev_err(vsp1->dev, "clu: failed to initialize controls\n");
 284                 ret = clu->ctrls.error;
 285                 vsp1_entity_destroy(&clu->entity);
 286                 return ERR_PTR(ret);
 287         }
 288
 289         v4l2_ctrl_handler_setup(&clu->ctrls);
 290
 291         return clu;
 292 }