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1// SPDX-License-Identifier: GPL-2.0+2/*3 * vsp1_hgt.c -- R-Car VSP1 Histogram Generator 2D4 *5 * Copyright (C) 2016 Renesas Electronics Corporation6 *7 * Contact: Niklas Söderlund (niklas.soderlund@ragnatech.se)8 */9 10#include <linux/device.h>11#include <linux/gfp.h>12 13#include <media/v4l2-subdev.h>14#include <media/videobuf2-vmalloc.h>15 16#include "vsp1.h"17#include "vsp1_dl.h"18#include "vsp1_hgt.h"19 20#define HGT_DATA_SIZE ((2 + 6 * 32) * 4)21 22/* -----------------------------------------------------------------------------23 * Device Access24 */25 26static inline u32 vsp1_hgt_read(struct vsp1_hgt *hgt, u32 reg)27{28 return vsp1_read(hgt->histo.entity.vsp1, reg);29}30 31static inline void vsp1_hgt_write(struct vsp1_hgt *hgt,32 struct vsp1_dl_body *dlb, u32 reg, u32 data)33{34 vsp1_dl_body_write(dlb, reg, data);35}36 37/* -----------------------------------------------------------------------------38 * Frame End Handler39 */40 41void vsp1_hgt_frame_end(struct vsp1_entity *entity)42{43 struct vsp1_hgt *hgt = to_hgt(&entity->subdev);44 struct vsp1_histogram_buffer *buf;45 unsigned int m;46 unsigned int n;47 u32 *data;48 49 buf = vsp1_histogram_buffer_get(&hgt->histo);50 if (!buf)51 return;52 53 data = buf->addr;54 55 *data++ = vsp1_hgt_read(hgt, VI6_HGT_MAXMIN);56 *data++ = vsp1_hgt_read(hgt, VI6_HGT_SUM);57 58 for (m = 0; m < 6; ++m)59 for (n = 0; n < 32; ++n)60 *data++ = vsp1_hgt_read(hgt, VI6_HGT_HISTO(m, n));61 62 vsp1_histogram_buffer_complete(&hgt->histo, buf, HGT_DATA_SIZE);63}64 65/* -----------------------------------------------------------------------------66 * Controls67 */68 69#define V4L2_CID_VSP1_HGT_HUE_AREAS (V4L2_CID_USER_BASE | 0x1001)70 71static int hgt_hue_areas_try_ctrl(struct v4l2_ctrl *ctrl)72{73 const u8 *values = ctrl->p_new.p_u8;74 unsigned int i;75 76 /*77 * The hardware has constraints on the hue area boundaries beyond the78 * control min, max and step. The values must match one of the following79 * expressions.80 *81 * 0L <= 0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U82 * 0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U <= 0L83 *84 * Start by verifying the common part...85 */86 for (i = 1; i < (HGT_NUM_HUE_AREAS * 2) - 1; ++i) {87 if (values[i] > values[i+1])88 return -EINVAL;89 }90 91 /* ... and handle 0L separately. */92 if (values[0] > values[1] && values[11] > values[0])93 return -EINVAL;94 95 return 0;96}97 98static int hgt_hue_areas_s_ctrl(struct v4l2_ctrl *ctrl)99{100 struct vsp1_hgt *hgt = container_of(ctrl->handler, struct vsp1_hgt,101 ctrls);102 103 memcpy(hgt->hue_areas, ctrl->p_new.p_u8, sizeof(hgt->hue_areas));104 return 0;105}106 107static const struct v4l2_ctrl_ops hgt_hue_areas_ctrl_ops = {108 .try_ctrl = hgt_hue_areas_try_ctrl,109 .s_ctrl = hgt_hue_areas_s_ctrl,110};111 112static const struct v4l2_ctrl_config hgt_hue_areas = {113 .ops = &hgt_hue_areas_ctrl_ops,114 .id = V4L2_CID_VSP1_HGT_HUE_AREAS,115 .name = "Boundary Values for Hue Area",116 .type = V4L2_CTRL_TYPE_U8,117 .min = 0,118 .max = 255,119 .def = 0,120 .step = 1,121 .dims = { 12 },122};123 124/* -----------------------------------------------------------------------------125 * VSP1 Entity Operations126 */127 128static void hgt_configure_stream(struct vsp1_entity *entity,129 struct v4l2_subdev_state *state,130 struct vsp1_pipeline *pipe,131 struct vsp1_dl_list *dl,132 struct vsp1_dl_body *dlb)133{134 struct vsp1_hgt *hgt = to_hgt(&entity->subdev);135 struct v4l2_rect *compose;136 struct v4l2_rect *crop;137 unsigned int hratio;138 unsigned int vratio;139 u8 lower;140 u8 upper;141 unsigned int i;142 143 crop = v4l2_subdev_state_get_crop(state, HISTO_PAD_SINK);144 compose = v4l2_subdev_state_get_compose(state, HISTO_PAD_SINK);145 146 vsp1_hgt_write(hgt, dlb, VI6_HGT_REGRST, VI6_HGT_REGRST_RCLEA);147 148 vsp1_hgt_write(hgt, dlb, VI6_HGT_OFFSET,149 (crop->left << VI6_HGT_OFFSET_HOFFSET_SHIFT) |150 (crop->top << VI6_HGT_OFFSET_VOFFSET_SHIFT));151 vsp1_hgt_write(hgt, dlb, VI6_HGT_SIZE,152 (crop->width << VI6_HGT_SIZE_HSIZE_SHIFT) |153 (crop->height << VI6_HGT_SIZE_VSIZE_SHIFT));154 155 mutex_lock(hgt->ctrls.lock);156 for (i = 0; i < HGT_NUM_HUE_AREAS; ++i) {157 lower = hgt->hue_areas[i*2 + 0];158 upper = hgt->hue_areas[i*2 + 1];159 vsp1_hgt_write(hgt, dlb, VI6_HGT_HUE_AREA(i),160 (lower << VI6_HGT_HUE_AREA_LOWER_SHIFT) |161 (upper << VI6_HGT_HUE_AREA_UPPER_SHIFT));162 }163 mutex_unlock(hgt->ctrls.lock);164 165 hratio = crop->width * 2 / compose->width / 3;166 vratio = crop->height * 2 / compose->height / 3;167 vsp1_hgt_write(hgt, dlb, VI6_HGT_MODE,168 (hratio << VI6_HGT_MODE_HRATIO_SHIFT) |169 (vratio << VI6_HGT_MODE_VRATIO_SHIFT));170}171 172static const struct vsp1_entity_operations hgt_entity_ops = {173 .configure_stream = hgt_configure_stream,174 .destroy = vsp1_histogram_destroy,175};176 177/* -----------------------------------------------------------------------------178 * Initialization and Cleanup179 */180 181static const unsigned int hgt_mbus_formats[] = {182 MEDIA_BUS_FMT_AHSV8888_1X32,183};184 185struct vsp1_hgt *vsp1_hgt_create(struct vsp1_device *vsp1)186{187 struct vsp1_hgt *hgt;188 int ret;189 190 hgt = devm_kzalloc(vsp1->dev, sizeof(*hgt), GFP_KERNEL);191 if (hgt == NULL)192 return ERR_PTR(-ENOMEM);193 194 /* Initialize the video device and queue for statistics data. */195 ret = vsp1_histogram_init(vsp1, &hgt->histo, VSP1_ENTITY_HGT, "hgt",196 &hgt_entity_ops, hgt_mbus_formats,197 ARRAY_SIZE(hgt_mbus_formats),198 HGT_DATA_SIZE, V4L2_META_FMT_VSP1_HGT);199 if (ret < 0) {200 vsp1_entity_destroy(&hgt->histo.entity);201 return ERR_PTR(ret);202 }203 204 /* Initialize the control handler. */205 v4l2_ctrl_handler_init(&hgt->ctrls, 1);206 v4l2_ctrl_new_custom(&hgt->ctrls, &hgt_hue_areas, NULL);207 208 hgt->histo.entity.subdev.ctrl_handler = &hgt->ctrls;209 210 v4l2_ctrl_handler_setup(&hgt->ctrls);211 212 return hgt;213}214