drivers/media/platform/renesas/vsp1/vsp1_hsit.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * vsp1_hsit.c  --  R-Car VSP1 Hue Saturation value (Inverse) Transform
   4  *
   5  * Copyright (C) 2013 Renesas Corporation
   6  *
   7  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   8  */
   9
  10 #include <linux/device.h>
  11 #include <linux/gfp.h>
  12
  13 #include <media/v4l2-subdev.h>
  14
  15 #include "vsp1.h"
  16 #include "vsp1_dl.h"
  17 #include "vsp1_hsit.h"
  18
  19 #define HSIT_MIN_SIZE                           4U
  20 #define HSIT_MAX_SIZE                           8190U
  21
  22 /* -----------------------------------------------------------------------------
  23  * Device Access
  24  */
  25
  26 static inline void vsp1_hsit_write(struct vsp1_hsit *hsit,
  27                                    struct vsp1_dl_body *dlb, u32 reg, u32 data)
  28 {
  29         vsp1_dl_body_write(dlb, reg, data);
  30 }
  31
  32 /* -----------------------------------------------------------------------------
  33  * V4L2 Subdevice Operations
  34  */
  35
  36 static int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
  37                                struct v4l2_subdev_state *sd_state,
  38                                struct v4l2_subdev_mbus_code_enum *code)
  39 {
  40         struct vsp1_hsit *hsit = to_hsit(subdev);
  41
  42         if (code->index > 0)
  43                 return -EINVAL;
  44
  45         if ((code->pad == HSIT_PAD_SINK && !hsit->inverse) |
  46             (code->pad == HSIT_PAD_SOURCE && hsit->inverse))
  47                 code->code = MEDIA_BUS_FMT_ARGB8888_1X32;
  48         else
  49                 code->code = MEDIA_BUS_FMT_AHSV8888_1X32;
  50
  51         return 0;
  52 }
  53
  54 static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
  55                                 struct v4l2_subdev_state *sd_state,
  56                                 struct v4l2_subdev_frame_size_enum *fse)
  57 {
  58         return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
  59                                            HSIT_MIN_SIZE,
  60                                            HSIT_MIN_SIZE, HSIT_MAX_SIZE,
  61                                            HSIT_MAX_SIZE);
  62 }
  63
  64 static int hsit_set_format(struct v4l2_subdev *subdev,
  65                            struct v4l2_subdev_state *sd_state,
  66                            struct v4l2_subdev_format *fmt)
  67 {
  68         struct vsp1_hsit *hsit = to_hsit(subdev);
  69         struct v4l2_subdev_state *config;
  70         struct v4l2_mbus_framefmt *format;
  71         int ret = 0;
  72
  73         mutex_lock(&hsit->entity.lock);
  74
  75         config = vsp1_entity_get_pad_config(&hsit->entity, sd_state,
  76                                             fmt->which);
  77         if (!config) {
  78                 ret = -EINVAL;
  79                 goto done;
  80         }
  81
  82         format = vsp1_entity_get_pad_format(&hsit->entity, config, fmt->pad);
  83
  84         if (fmt->pad == HSIT_PAD_SOURCE) {
  85                 /*
  86                  * The HST and HSI output format code and resolution can't be
  87                  * modified.
  88                  */
  89                 fmt->format = *format;
  90                 goto done;
  91         }
  92
  93         format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
  94                      : MEDIA_BUS_FMT_ARGB8888_1X32;
  95         format->width = clamp_t(unsigned int, fmt->format.width,
  96                                 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
  97         format->height = clamp_t(unsigned int, fmt->format.height,
  98                                  HSIT_MIN_SIZE, HSIT_MAX_SIZE);
  99         format->field = V4L2_FIELD_NONE;
 100         format->colorspace = V4L2_COLORSPACE_SRGB;
 101
 102         fmt->format = *format;
 103
 104         /* Propagate the format to the source pad. */
 105         format = vsp1_entity_get_pad_format(&hsit->entity, config,
 106                                             HSIT_PAD_SOURCE);
 107         *format = fmt->format;
 108         format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
 109                      : MEDIA_BUS_FMT_AHSV8888_1X32;
 110
 111 done:
 112         mutex_unlock(&hsit->entity.lock);
 113         return ret;
 114 }
 115
 116 static const struct v4l2_subdev_pad_ops hsit_pad_ops = {
 117         .init_cfg = vsp1_entity_init_cfg,
 118         .enum_mbus_code = hsit_enum_mbus_code,
 119         .enum_frame_size = hsit_enum_frame_size,
 120         .get_fmt = vsp1_subdev_get_pad_format,
 121         .set_fmt = hsit_set_format,
 122 };
 123
 124 static const struct v4l2_subdev_ops hsit_ops = {
 125         .pad    = &hsit_pad_ops,
 126 };
 127
 128 /* -----------------------------------------------------------------------------
 129  * VSP1 Entity Operations
 130  */
 131
 132 static void hsit_configure_stream(struct vsp1_entity *entity,
 133                                   struct vsp1_pipeline *pipe,
 134                                   struct vsp1_dl_list *dl,
 135                                   struct vsp1_dl_body *dlb)
 136 {
 137         struct vsp1_hsit *hsit = to_hsit(&entity->subdev);
 138
 139         if (hsit->inverse)
 140                 vsp1_hsit_write(hsit, dlb, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
 141         else
 142                 vsp1_hsit_write(hsit, dlb, VI6_HST_CTRL, VI6_HST_CTRL_EN);
 143 }
 144
 145 static const struct vsp1_entity_operations hsit_entity_ops = {
 146         .configure_stream = hsit_configure_stream,
 147 };
 148
 149 /* -----------------------------------------------------------------------------
 150  * Initialization and Cleanup
 151  */
 152
 153 struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
 154 {
 155         struct vsp1_hsit *hsit;
 156         int ret;
 157
 158         hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
 159         if (hsit == NULL)
 160                 return ERR_PTR(-ENOMEM);
 161
 162         hsit->inverse = inverse;
 163
 164         hsit->entity.ops = &hsit_entity_ops;
 165
 166         if (inverse)
 167                 hsit->entity.type = VSP1_ENTITY_HSI;
 168         else
 169                 hsit->entity.type = VSP1_ENTITY_HST;
 170
 171         ret = vsp1_entity_init(vsp1, &hsit->entity, inverse ? "hsi" : "hst",
 172                                2, &hsit_ops,
 173                                MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV);
 174         if (ret < 0)
 175                 return ERR_PTR(ret);
 176
 177         return hsit;
 178 }