drivers/media/platform/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_pad_config *cfg,
  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_pad_config *cfg,
  56                                 struct v4l2_subdev_frame_size_enum *fse)
  57 {
  58         return vsp1_subdev_enum_frame_size(subdev, cfg, fse, HSIT_MIN_SIZE,
  59                                            HSIT_MIN_SIZE, HSIT_MAX_SIZE,
  60                                            HSIT_MAX_SIZE);
  61 }
  62
  63 static int hsit_set_format(struct v4l2_subdev *subdev,
  64                            struct v4l2_subdev_pad_config *cfg,
  65                            struct v4l2_subdev_format *fmt)
  66 {
  67         struct vsp1_hsit *hsit = to_hsit(subdev);
  68         struct v4l2_subdev_pad_config *config;
  69         struct v4l2_mbus_framefmt *format;
  70         int ret = 0;
  71
  72         mutex_lock(&hsit->entity.lock);
  73
  74         config = vsp1_entity_get_pad_config(&hsit->entity, cfg, fmt->which);
  75         if (!config) {
  76                 ret = -EINVAL;
  77                 goto done;
  78         }
  79
  80         format = vsp1_entity_get_pad_format(&hsit->entity, config, fmt->pad);
  81
  82         if (fmt->pad == HSIT_PAD_SOURCE) {
  83                 /*
  84                  * The HST and HSI output format code and resolution can't be
  85                  * modified.
  86                  */
  87                 fmt->format = *format;
  88                 goto done;
  89         }
  90
  91         format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
  92                      : MEDIA_BUS_FMT_ARGB8888_1X32;
  93         format->width = clamp_t(unsigned int, fmt->format.width,
  94                                 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
  95         format->height = clamp_t(unsigned int, fmt->format.height,
  96                                  HSIT_MIN_SIZE, HSIT_MAX_SIZE);
  97         format->field = V4L2_FIELD_NONE;
  98         format->colorspace = V4L2_COLORSPACE_SRGB;
  99
 100         fmt->format = *format;
 101
 102         /* Propagate the format to the source pad. */
 103         format = vsp1_entity_get_pad_format(&hsit->entity, config,
 104                                             HSIT_PAD_SOURCE);
 105         *format = fmt->format;
 106         format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
 107                      : MEDIA_BUS_FMT_AHSV8888_1X32;
 108
 109 done:
 110         mutex_unlock(&hsit->entity.lock);
 111         return ret;
 112 }
 113
 114 static const struct v4l2_subdev_pad_ops hsit_pad_ops = {
 115         .init_cfg = vsp1_entity_init_cfg,
 116         .enum_mbus_code = hsit_enum_mbus_code,
 117         .enum_frame_size = hsit_enum_frame_size,
 118         .get_fmt = vsp1_subdev_get_pad_format,
 119         .set_fmt = hsit_set_format,
 120 };
 121
 122 static const struct v4l2_subdev_ops hsit_ops = {
 123         .pad    = &hsit_pad_ops,
 124 };
 125
 126 /* -----------------------------------------------------------------------------
 127  * VSP1 Entity Operations
 128  */
 129
 130 static void hsit_configure_stream(struct vsp1_entity *entity,
 131                                   struct vsp1_pipeline *pipe,
 132                                   struct vsp1_dl_list *dl,
 133                                   struct vsp1_dl_body *dlb)
 134 {
 135         struct vsp1_hsit *hsit = to_hsit(&entity->subdev);
 136
 137         if (hsit->inverse)
 138                 vsp1_hsit_write(hsit, dlb, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
 139         else
 140                 vsp1_hsit_write(hsit, dlb, VI6_HST_CTRL, VI6_HST_CTRL_EN);
 141 }
 142
 143 static const struct vsp1_entity_operations hsit_entity_ops = {
 144         .configure_stream = hsit_configure_stream,
 145 };
 146
 147 /* -----------------------------------------------------------------------------
 148  * Initialization and Cleanup
 149  */
 150
 151 struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
 152 {
 153         struct vsp1_hsit *hsit;
 154         int ret;
 155
 156         hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
 157         if (hsit == NULL)
 158                 return ERR_PTR(-ENOMEM);
 159
 160         hsit->inverse = inverse;
 161
 162         hsit->entity.ops = &hsit_entity_ops;
 163
 164         if (inverse)
 165                 hsit->entity.type = VSP1_ENTITY_HSI;
 166         else
 167                 hsit->entity.type = VSP1_ENTITY_HST;
 168
 169         ret = vsp1_entity_init(vsp1, &hsit->entity, inverse ? "hsi" : "hst",
 170                                2, &hsit_ops,
 171                                MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV);
 172         if (ret < 0)
 173                 return ERR_PTR(ret);
 174
 175         return hsit;
 176 }