drivers/media/platform/vsp1/vsp1_hsit.c

   1 /*
   2  * vsp1_hsit.c  --  R-Car VSP1 Hue Saturation value (Inverse) Transform
   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_hsit.h"
  22
  23 #define HSIT_MIN_SIZE                           4U
  24 #define HSIT_MAX_SIZE                           8190U
  25
  26 /* -----------------------------------------------------------------------------
  27  * Device Access
  28  */
  29
  30 static inline void vsp1_hsit_write(struct vsp1_hsit *hsit,
  31                                    struct vsp1_dl_list *dl, u32 reg, u32 data)
  32 {
  33         vsp1_dl_list_write(dl, reg, data);
  34 }
  35
  36 /* -----------------------------------------------------------------------------
  37  * V4L2 Subdevice Operations
  38  */
  39
  40 static int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
  41                                struct v4l2_subdev_pad_config *cfg,
  42                                struct v4l2_subdev_mbus_code_enum *code)
  43 {
  44         struct vsp1_hsit *hsit = to_hsit(subdev);
  45
  46         if (code->index > 0)
  47                 return -EINVAL;
  48
  49         if ((code->pad == HSIT_PAD_SINK && !hsit->inverse) |
  50             (code->pad == HSIT_PAD_SOURCE && hsit->inverse))
  51                 code->code = MEDIA_BUS_FMT_ARGB8888_1X32;
  52         else
  53                 code->code = MEDIA_BUS_FMT_AHSV8888_1X32;
  54
  55         return 0;
  56 }
  57
  58 static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
  59                                 struct v4l2_subdev_pad_config *cfg,
  60                                 struct v4l2_subdev_frame_size_enum *fse)
  61 {
  62         struct vsp1_hsit *hsit = to_hsit(subdev);
  63         struct v4l2_subdev_pad_config *config;
  64         struct v4l2_mbus_framefmt *format;
  65
  66         config = vsp1_entity_get_pad_config(&hsit->entity, cfg, fse->which);
  67         if (!config)
  68                 return -EINVAL;
  69
  70         format = vsp1_entity_get_pad_format(&hsit->entity, config, fse->pad);
  71
  72         if (fse->index || fse->code != format->code)
  73                 return -EINVAL;
  74
  75         if (fse->pad == HSIT_PAD_SINK) {
  76                 fse->min_width = HSIT_MIN_SIZE;
  77                 fse->max_width = HSIT_MAX_SIZE;
  78                 fse->min_height = HSIT_MIN_SIZE;
  79                 fse->max_height = HSIT_MAX_SIZE;
  80         } else {
  81                 /* The size on the source pad are fixed and always identical to
  82                  * the size on the sink pad.
  83                  */
  84                 fse->min_width = format->width;
  85                 fse->max_width = format->width;
  86                 fse->min_height = format->height;
  87                 fse->max_height = format->height;
  88         }
  89
  90         return 0;
  91 }
  92
  93 static int hsit_set_format(struct v4l2_subdev *subdev,
  94                            struct v4l2_subdev_pad_config *cfg,
  95                            struct v4l2_subdev_format *fmt)
  96 {
  97         struct vsp1_hsit *hsit = to_hsit(subdev);
  98         struct v4l2_subdev_pad_config *config;
  99         struct v4l2_mbus_framefmt *format;
 100
 101         config = vsp1_entity_get_pad_config(&hsit->entity, cfg, fmt->which);
 102         if (!config)
 103                 return -EINVAL;
 104
 105         format = vsp1_entity_get_pad_format(&hsit->entity, config, fmt->pad);
 106
 107         if (fmt->pad == HSIT_PAD_SOURCE) {
 108                 /* The HST and HSI output format code and resolution can't be
 109                  * modified.
 110                  */
 111                 fmt->format = *format;
 112                 return 0;
 113         }
 114
 115         format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
 116                      : MEDIA_BUS_FMT_ARGB8888_1X32;
 117         format->width = clamp_t(unsigned int, fmt->format.width,
 118                                 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
 119         format->height = clamp_t(unsigned int, fmt->format.height,
 120                                  HSIT_MIN_SIZE, HSIT_MAX_SIZE);
 121         format->field = V4L2_FIELD_NONE;
 122         format->colorspace = V4L2_COLORSPACE_SRGB;
 123
 124         fmt->format = *format;
 125
 126         /* Propagate the format to the source pad. */
 127         format = vsp1_entity_get_pad_format(&hsit->entity, config,
 128                                             HSIT_PAD_SOURCE);
 129         *format = fmt->format;
 130         format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
 131                      : MEDIA_BUS_FMT_AHSV8888_1X32;
 132
 133         return 0;
 134 }
 135
 136 static struct v4l2_subdev_pad_ops hsit_pad_ops = {
 137         .init_cfg = vsp1_entity_init_cfg,
 138         .enum_mbus_code = hsit_enum_mbus_code,
 139         .enum_frame_size = hsit_enum_frame_size,
 140         .get_fmt = vsp1_subdev_get_pad_format,
 141         .set_fmt = hsit_set_format,
 142 };
 143
 144 static struct v4l2_subdev_ops hsit_ops = {
 145         .pad    = &hsit_pad_ops,
 146 };
 147
 148 /* -----------------------------------------------------------------------------
 149  * VSP1 Entity Operations
 150  */
 151
 152 static void hsit_configure(struct vsp1_entity *entity,
 153                            struct vsp1_pipeline *pipe,
 154                            struct vsp1_dl_list *dl)
 155 {
 156         struct vsp1_hsit *hsit = to_hsit(&entity->subdev);
 157
 158         if (hsit->inverse)
 159                 vsp1_hsit_write(hsit, dl, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
 160         else
 161                 vsp1_hsit_write(hsit, dl, VI6_HST_CTRL, VI6_HST_CTRL_EN);
 162 }
 163
 164 static const struct vsp1_entity_operations hsit_entity_ops = {
 165         .configure = hsit_configure,
 166 };
 167
 168 /* -----------------------------------------------------------------------------
 169  * Initialization and Cleanup
 170  */
 171
 172 struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
 173 {
 174         struct vsp1_hsit *hsit;
 175         int ret;
 176
 177         hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
 178         if (hsit == NULL)
 179                 return ERR_PTR(-ENOMEM);
 180
 181         hsit->inverse = inverse;
 182
 183         hsit->entity.ops = &hsit_entity_ops;
 184
 185         if (inverse)
 186                 hsit->entity.type = VSP1_ENTITY_HSI;
 187         else
 188                 hsit->entity.type = VSP1_ENTITY_HST;
 189
 190         ret = vsp1_entity_init(vsp1, &hsit->entity, inverse ? "hsi" : "hst", 2,
 191                                &hsit_ops);
 192         if (ret < 0)
 193                 return ERR_PTR(ret);
 194
 195         return hsit;
 196 }