drivers/media/platform/renesas/vsp1/vsp1_clu.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * vsp1_clu.c  --  R-Car VSP1 Cubic Look-Up Table
   4  *
   5  * Copyright (C) 2015-2016 Renesas Electronics Corporation
   6  *
   7  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   8  */
   9
  10 #include <linux/device.h>
  11 #include <linux/slab.h>
  12
  13 #include <media/v4l2-subdev.h>
  14
  15 #include "vsp1.h"
  16 #include "vsp1_clu.h"
  17 #include "vsp1_dl.h"
  18
  19 #define CLU_MIN_SIZE                            4U
  20 #define CLU_MAX_SIZE                            8190U
  21
  22 #define CLU_SIZE                                (17 * 17 * 17)
  23
  24 /* -----------------------------------------------------------------------------
  25  * Device Access
  26  */
  27
  28 static inline void vsp1_clu_write(struct vsp1_clu *clu,
  29                                   struct vsp1_dl_body *dlb, u32 reg, u32 data)
  30 {
  31         vsp1_dl_body_write(dlb, reg, data);
  32 }
  33
  34 /* -----------------------------------------------------------------------------
  35  * Controls
  36  */
  37
  38 #define V4L2_CID_VSP1_CLU_TABLE                 (V4L2_CID_USER_BASE | 0x1001)
  39 #define V4L2_CID_VSP1_CLU_MODE                  (V4L2_CID_USER_BASE | 0x1002)
  40 #define V4L2_CID_VSP1_CLU_MODE_2D               0
  41 #define V4L2_CID_VSP1_CLU_MODE_3D               1
  42
  43 static int clu_set_table(struct vsp1_clu *clu, struct v4l2_ctrl *ctrl)
  44 {
  45         struct vsp1_dl_body *dlb;
  46         unsigned int i;
  47
  48         dlb = vsp1_dl_body_get(clu->pool);
  49         if (!dlb)
  50                 return -ENOMEM;
  51
  52         vsp1_dl_body_write(dlb, VI6_CLU_ADDR, 0);
  53         for (i = 0; i < CLU_SIZE; ++i)
  54                 vsp1_dl_body_write(dlb, VI6_CLU_DATA, ctrl->p_new.p_u32[i]);
  55
  56         spin_lock_irq(&clu->lock);
  57         swap(clu->clu, dlb);
  58         spin_unlock_irq(&clu->lock);
  59
  60         vsp1_dl_body_put(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 const unsigned int clu_codes[] = {
 120         MEDIA_BUS_FMT_ARGB8888_1X32,
 121         MEDIA_BUS_FMT_AHSV8888_1X32,
 122         MEDIA_BUS_FMT_AYUV8_1X32,
 123 };
 124
 125 static int clu_enum_mbus_code(struct v4l2_subdev *subdev,
 126                               struct v4l2_subdev_state *sd_state,
 127                               struct v4l2_subdev_mbus_code_enum *code)
 128 {
 129         return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, clu_codes,
 130                                           ARRAY_SIZE(clu_codes));
 131 }
 132
 133 static int clu_enum_frame_size(struct v4l2_subdev *subdev,
 134                                struct v4l2_subdev_state *sd_state,
 135                                struct v4l2_subdev_frame_size_enum *fse)
 136 {
 137         return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
 138                                            CLU_MIN_SIZE,
 139                                            CLU_MIN_SIZE, CLU_MAX_SIZE,
 140                                            CLU_MAX_SIZE);
 141 }
 142
 143 static int clu_set_format(struct v4l2_subdev *subdev,
 144                           struct v4l2_subdev_state *sd_state,
 145                           struct v4l2_subdev_format *fmt)
 146 {
 147         return vsp1_subdev_set_pad_format(subdev, sd_state, fmt, clu_codes,
 148                                           ARRAY_SIZE(clu_codes),
 149                                           CLU_MIN_SIZE, CLU_MIN_SIZE,
 150                                           CLU_MAX_SIZE, CLU_MAX_SIZE);
 151 }
 152
 153 /* -----------------------------------------------------------------------------
 154  * V4L2 Subdevice Operations
 155  */
 156
 157 static const struct v4l2_subdev_pad_ops clu_pad_ops = {
 158         .init_cfg = vsp1_entity_init_cfg,
 159         .enum_mbus_code = clu_enum_mbus_code,
 160         .enum_frame_size = clu_enum_frame_size,
 161         .get_fmt = vsp1_subdev_get_pad_format,
 162         .set_fmt = clu_set_format,
 163 };
 164
 165 static const struct v4l2_subdev_ops clu_ops = {
 166         .pad    = &clu_pad_ops,
 167 };
 168
 169 /* -----------------------------------------------------------------------------
 170  * VSP1 Entity Operations
 171  */
 172
 173 static void clu_configure_stream(struct vsp1_entity *entity,
 174                                  struct vsp1_pipeline *pipe,
 175                                  struct vsp1_dl_list *dl,
 176                                  struct vsp1_dl_body *dlb)
 177 {
 178         struct vsp1_clu *clu = to_clu(&entity->subdev);
 179         struct v4l2_mbus_framefmt *format;
 180
 181         /*
 182          * The yuv_mode can't be changed during streaming. Cache it internally
 183          * for future runtime configuration calls.
 184          */
 185         format = vsp1_entity_get_pad_format(&clu->entity,
 186                                             clu->entity.config,
 187                                             CLU_PAD_SINK);
 188         clu->yuv_mode = format->code == MEDIA_BUS_FMT_AYUV8_1X32;
 189 }
 190
 191 static void clu_configure_frame(struct vsp1_entity *entity,
 192                                 struct vsp1_pipeline *pipe,
 193                                 struct vsp1_dl_list *dl,
 194                                 struct vsp1_dl_body *dlb)
 195 {
 196         struct vsp1_clu *clu = to_clu(&entity->subdev);
 197         struct vsp1_dl_body *clu_dlb;
 198         unsigned long flags;
 199         u32 ctrl = VI6_CLU_CTRL_AAI | VI6_CLU_CTRL_MVS | VI6_CLU_CTRL_EN;
 200
 201         /* 2D mode can only be used with the YCbCr pixel encoding. */
 202         if (clu->mode == V4L2_CID_VSP1_CLU_MODE_2D && clu->yuv_mode)
 203                 ctrl |= VI6_CLU_CTRL_AX1I_2D | VI6_CLU_CTRL_AX2I_2D
 204                      |  VI6_CLU_CTRL_OS0_2D | VI6_CLU_CTRL_OS1_2D
 205                      |  VI6_CLU_CTRL_OS2_2D | VI6_CLU_CTRL_M2D;
 206
 207         vsp1_clu_write(clu, dlb, VI6_CLU_CTRL, ctrl);
 208
 209         spin_lock_irqsave(&clu->lock, flags);
 210         clu_dlb = clu->clu;
 211         clu->clu = NULL;
 212         spin_unlock_irqrestore(&clu->lock, flags);
 213
 214         if (clu_dlb) {
 215                 vsp1_dl_list_add_body(dl, clu_dlb);
 216
 217                 /* Release our local reference. */
 218                 vsp1_dl_body_put(clu_dlb);
 219         }
 220 }
 221
 222 static void clu_destroy(struct vsp1_entity *entity)
 223 {
 224         struct vsp1_clu *clu = to_clu(&entity->subdev);
 225
 226         vsp1_dl_body_pool_destroy(clu->pool);
 227 }
 228
 229 static const struct vsp1_entity_operations clu_entity_ops = {
 230         .configure_stream = clu_configure_stream,
 231         .configure_frame = clu_configure_frame,
 232         .destroy = clu_destroy,
 233 };
 234
 235 /* -----------------------------------------------------------------------------
 236  * Initialization and Cleanup
 237  */
 238
 239 struct vsp1_clu *vsp1_clu_create(struct vsp1_device *vsp1)
 240 {
 241         struct vsp1_clu *clu;
 242         int ret;
 243
 244         clu = devm_kzalloc(vsp1->dev, sizeof(*clu), GFP_KERNEL);
 245         if (clu == NULL)
 246                 return ERR_PTR(-ENOMEM);
 247
 248         spin_lock_init(&clu->lock);
 249
 250         clu->entity.ops = &clu_entity_ops;
 251         clu->entity.type = VSP1_ENTITY_CLU;
 252
 253         ret = vsp1_entity_init(vsp1, &clu->entity, "clu", 2, &clu_ops,
 254                                MEDIA_ENT_F_PROC_VIDEO_LUT);
 255         if (ret < 0)
 256                 return ERR_PTR(ret);
 257
 258         /*
 259          * Pre-allocate a body pool, with 3 bodies allowing a userspace update
 260          * before the hardware has committed a previous set of tables, handling
 261          * both the queued and pending dl entries. One extra entry is added to
 262          * the CLU_SIZE to allow for the VI6_CLU_ADDR header.
 263          */
 264         clu->pool = vsp1_dl_body_pool_create(clu->entity.vsp1, 3, CLU_SIZE + 1,
 265                                              0);
 266         if (!clu->pool)
 267                 return ERR_PTR(-ENOMEM);
 268
 269         /* Initialize the control handler. */
 270         v4l2_ctrl_handler_init(&clu->ctrls, 2);
 271         v4l2_ctrl_new_custom(&clu->ctrls, &clu_table_control, NULL);
 272         v4l2_ctrl_new_custom(&clu->ctrls, &clu_mode_control, NULL);
 273
 274         clu->entity.subdev.ctrl_handler = &clu->ctrls;
 275
 276         if (clu->ctrls.error) {
 277                 dev_err(vsp1->dev, "clu: failed to initialize controls\n");
 278                 ret = clu->ctrls.error;
 279                 vsp1_entity_destroy(&clu->entity);
 280                 return ERR_PTR(ret);
 281         }
 282
 283         v4l2_ctrl_handler_setup(&clu->ctrls);
 284
 285         return clu;
 286 }