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         return vsp1_subdev_enum_frame_size(subdev, cfg, fse, HSIT_MIN_SIZE,
  63                                            HSIT_MIN_SIZE, HSIT_MAX_SIZE,
  64                                            HSIT_MAX_SIZE);
  65 }
  66
  67 static int hsit_set_format(struct v4l2_subdev *subdev,
  68                            struct v4l2_subdev_pad_config *cfg,
  69                            struct v4l2_subdev_format *fmt)
  70 {
  71         struct vsp1_hsit *hsit = to_hsit(subdev);
  72         struct v4l2_subdev_pad_config *config;
  73         struct v4l2_mbus_framefmt *format;
  74         int ret = 0;
  75
  76         mutex_lock(&hsit->entity.lock);
  77
  78         config = vsp1_entity_get_pad_config(&hsit->entity, cfg, fmt->which);
  79         if (!config) {
  80                 ret = -EINVAL;
  81                 goto done;
  82         }
  83
  84         format = vsp1_entity_get_pad_format(&hsit->entity, config, fmt->pad);
  85
  86         if (fmt->pad == HSIT_PAD_SOURCE) {
  87                 /* The HST and HSI output format code and resolution can't be
  88                  * modified.
  89                  */
  90                 fmt->format = *format;
  91                 goto done;
  92         }
  93
  94         format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
  95                      : MEDIA_BUS_FMT_ARGB8888_1X32;
  96         format->width = clamp_t(unsigned int, fmt->format.width,
  97                                 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
  98         format->height = clamp_t(unsigned int, fmt->format.height,
  99                                  HSIT_MIN_SIZE, HSIT_MAX_SIZE);
 100         format->field = V4L2_FIELD_NONE;
 101         format->colorspace = V4L2_COLORSPACE_SRGB;
 102
 103         fmt->format = *format;
 104
 105         /* Propagate the format to the source pad. */
 106         format = vsp1_entity_get_pad_format(&hsit->entity, config,
 107                                             HSIT_PAD_SOURCE);
 108         *format = fmt->format;
 109         format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
 110                      : MEDIA_BUS_FMT_AHSV8888_1X32;
 111
 112 done:
 113         mutex_unlock(&hsit->entity.lock);
 114         return ret;
 115 }
 116
 117 static const struct v4l2_subdev_pad_ops hsit_pad_ops = {
 118         .init_cfg = vsp1_entity_init_cfg,
 119         .enum_mbus_code = hsit_enum_mbus_code,
 120         .enum_frame_size = hsit_enum_frame_size,
 121         .get_fmt = vsp1_subdev_get_pad_format,
 122         .set_fmt = hsit_set_format,
 123 };
 124
 125 static const struct v4l2_subdev_ops hsit_ops = {
 126         .pad    = &hsit_pad_ops,
 127 };
 128
 129 /* -----------------------------------------------------------------------------
 130  * VSP1 Entity Operations
 131  */
 132
 133 static void hsit_configure(struct vsp1_entity *entity,
 134                            struct vsp1_pipeline *pipe,
 135                            struct vsp1_dl_list *dl,
 136                            enum vsp1_entity_params params)
 137 {
 138         struct vsp1_hsit *hsit = to_hsit(&entity->subdev);
 139
 140         if (params != VSP1_ENTITY_PARAMS_INIT)
 141                 return;
 142
 143         if (hsit->inverse)
 144                 vsp1_hsit_write(hsit, dl, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
 145         else
 146                 vsp1_hsit_write(hsit, dl, VI6_HST_CTRL, VI6_HST_CTRL_EN);
 147 }
 148
 149 static const struct vsp1_entity_operations hsit_entity_ops = {
 150         .configure = hsit_configure,
 151 };
 152
 153 /* -----------------------------------------------------------------------------
 154  * Initialization and Cleanup
 155  */
 156
 157 struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
 158 {
 159         struct vsp1_hsit *hsit;
 160         int ret;
 161
 162         hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
 163         if (hsit == NULL)
 164                 return ERR_PTR(-ENOMEM);
 165
 166         hsit->inverse = inverse;
 167
 168         hsit->entity.ops = &hsit_entity_ops;
 169
 170         if (inverse)
 171                 hsit->entity.type = VSP1_ENTITY_HSI;
 172         else
 173                 hsit->entity.type = VSP1_ENTITY_HST;
 174
 175         ret = vsp1_entity_init(vsp1, &hsit->entity, inverse ? "hsi" : "hst",
 176                                2, &hsit_ops,
 177                                MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV);
 178         if (ret < 0)
 179                 return ERR_PTR(ret);
 180
 181         return hsit;
 182 }