1/* 2 * vsp1_wpf.c -- R-Car VSP1 Write Pixel Formatter 3 * 4 * Copyright (C) 2013-2014 Renesas Electronics 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 16#include <media/v4l2-subdev.h> 17 18#include "vsp1.h" 19#include "vsp1_rwpf.h" 20#include "vsp1_video.h" 21 22#define WPF_MAX_WIDTH 2048 23#define WPF_MAX_HEIGHT 2048 24 25/* ----------------------------------------------------------------------------- 26 * Device Access 27 */ 28 29static inline u32 vsp1_wpf_read(struct vsp1_rwpf *wpf, u32 reg) 30{ 31 return vsp1_read(wpf->entity.vsp1, 32 reg + wpf->entity.index * VI6_WPF_OFFSET); 33} 34 35static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf, u32 reg, u32 data) 36{ 37 vsp1_write(wpf->entity.vsp1, 38 reg + wpf->entity.index * VI6_WPF_OFFSET, data); 39} 40 41/* ----------------------------------------------------------------------------- 42 * Controls 43 */ 44 45static int wpf_s_ctrl(struct v4l2_ctrl *ctrl) 46{ 47 struct vsp1_rwpf *wpf = 48 container_of(ctrl->handler, struct vsp1_rwpf, ctrls); 49 u32 value; 50 51 if (!vsp1_entity_is_streaming(&wpf->entity)) 52 return 0; 53 54 switch (ctrl->id) { 55 case V4L2_CID_ALPHA_COMPONENT: 56 value = vsp1_wpf_read(wpf, VI6_WPF_OUTFMT); 57 value &= ~VI6_WPF_OUTFMT_PDV_MASK; 58 value |= ctrl->val << VI6_WPF_OUTFMT_PDV_SHIFT; 59 vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, value); 60 break; 61 } 62 63 return 0; 64} 65 66static const struct v4l2_ctrl_ops wpf_ctrl_ops = { 67 .s_ctrl = wpf_s_ctrl, 68}; 69 70/* ----------------------------------------------------------------------------- 71 * V4L2 Subdevice Core Operations 72 */ 73 74static int wpf_s_stream(struct v4l2_subdev *subdev, int enable) 75{ 76 struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity); 77 struct vsp1_rwpf *wpf = to_rwpf(subdev); 78 struct vsp1_device *vsp1 = wpf->entity.vsp1; 79 const struct v4l2_rect *crop = &wpf->crop; 80 unsigned int i; 81 u32 srcrpf = 0; 82 u32 outfmt = 0; 83 int ret; 84 85 ret = vsp1_entity_set_streaming(&wpf->entity, enable); 86 if (ret < 0) 87 return ret; 88 89 if (!enable) { 90 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0); 91 vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, 0); 92 return 0; 93 } 94 95 /* Sources. If the pipeline has a single input configure it as the 96 * master layer. Otherwise configure all inputs as sub-layers and 97 * select the virtual RPF as the master layer. 98 */ 99 for (i = 0; i < pipe->num_inputs; ++i) { 100 struct vsp1_rwpf *input = pipe->inputs[i]; 101 102 srcrpf |= pipe->num_inputs == 1 103 ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index) 104 : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index); 105 } 106 107 if (pipe->num_inputs > 1) 108 srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST; 109 110 vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf); 111 112 /* Destination stride. */ 113 if (!pipe->lif) { 114 struct v4l2_pix_format_mplane *format = &wpf->video.format; 115 116 vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y, 117 format->plane_fmt[0].bytesperline); 118 if (format->num_planes > 1) 119 vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C, 120 format->plane_fmt[1].bytesperline); 121 } 122 123 vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN | 124 (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) | 125 (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT)); 126 vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN | 127 (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) | 128 (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT)); 129 130 /* Format */ 131 if (!pipe->lif) { 132 const struct vsp1_format_info *fmtinfo = wpf->video.fmtinfo; 133 134 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT; 135 136 if (fmtinfo->alpha) 137 outfmt |= VI6_WPF_OUTFMT_PXA; 138 if (fmtinfo->swap_yc) 139 outfmt |= VI6_WPF_OUTFMT_SPYCS; 140 if (fmtinfo->swap_uv) 141 outfmt |= VI6_WPF_OUTFMT_SPUVS; 142 143 vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap); 144 } 145 146 if (wpf->entity.formats[RWPF_PAD_SINK].code != 147 wpf->entity.formats[RWPF_PAD_SOURCE].code) 148 outfmt |= VI6_WPF_OUTFMT_CSC; 149 150 /* Take the control handler lock to ensure that the PDV value won't be 151 * changed behind our back by a set control operation. 152 */ 153 mutex_lock(wpf->ctrls.lock); 154 outfmt |= vsp1_wpf_read(wpf, VI6_WPF_OUTFMT) & VI6_WPF_OUTFMT_PDV_MASK; 155 vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt); 156 mutex_unlock(wpf->ctrls.lock); 157 158 vsp1_write(vsp1, VI6_DPR_WPF_FPORCH(wpf->entity.index), 159 VI6_DPR_WPF_FPORCH_FP_WPFN); 160 161 vsp1_write(vsp1, VI6_WPF_WRBCK_CTRL, 0); 162 163 /* Enable interrupts */ 164 vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0); 165 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 166 VI6_WFP_IRQ_ENB_FREE); 167 168 return 0; 169} 170 171/* ----------------------------------------------------------------------------- 172 * V4L2 Subdevice Operations 173 */ 174 175static struct v4l2_subdev_video_ops wpf_video_ops = { 176 .s_stream = wpf_s_stream, 177}; 178 179static struct v4l2_subdev_pad_ops wpf_pad_ops = { 180 .enum_mbus_code = vsp1_rwpf_enum_mbus_code, 181 .enum_frame_size = vsp1_rwpf_enum_frame_size, 182 .get_fmt = vsp1_rwpf_get_format, 183 .set_fmt = vsp1_rwpf_set_format, 184 .get_selection = vsp1_rwpf_get_selection, 185 .set_selection = vsp1_rwpf_set_selection, 186}; 187 188static struct v4l2_subdev_ops wpf_ops = { 189 .video = &wpf_video_ops, 190 .pad = &wpf_pad_ops, 191}; 192 193/* ----------------------------------------------------------------------------- 194 * Video Device Operations 195 */ 196 197static void wpf_vdev_queue(struct vsp1_video *video, 198 struct vsp1_video_buffer *buf) 199{ 200 struct vsp1_rwpf *wpf = container_of(video, struct vsp1_rwpf, video); 201 202 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, buf->addr[0]); 203 if (buf->buf.num_planes > 1) 204 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, buf->addr[1]); 205 if (buf->buf.num_planes > 2) 206 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, buf->addr[2]); 207} 208 209static const struct vsp1_video_operations wpf_vdev_ops = { 210 .queue = wpf_vdev_queue, 211}; 212 213/* ----------------------------------------------------------------------------- 214 * Initialization and Cleanup 215 */ 216 217struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index) 218{ 219 struct v4l2_subdev *subdev; 220 struct vsp1_video *video; 221 struct vsp1_rwpf *wpf; 222 unsigned int flags; 223 int ret; 224 225 wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL); 226 if (wpf == NULL) 227 return ERR_PTR(-ENOMEM); 228 229 wpf->max_width = WPF_MAX_WIDTH; 230 wpf->max_height = WPF_MAX_HEIGHT; 231 232 wpf->entity.type = VSP1_ENTITY_WPF; 233 wpf->entity.index = index; 234 235 ret = vsp1_entity_init(vsp1, &wpf->entity, 2); 236 if (ret < 0) 237 return ERR_PTR(ret); 238 239 /* Initialize the V4L2 subdev. */ 240 subdev = &wpf->entity.subdev; 241 v4l2_subdev_init(subdev, &wpf_ops); 242 243 subdev->entity.ops = &vsp1_media_ops; 244 subdev->internal_ops = &vsp1_subdev_internal_ops; 245 snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u", 246 dev_name(vsp1->dev), index); 247 v4l2_set_subdevdata(subdev, wpf); 248 subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 249 250 vsp1_entity_init_formats(subdev, NULL); 251 252 /* Initialize the control handler. */ 253 v4l2_ctrl_handler_init(&wpf->ctrls, 1); 254 v4l2_ctrl_new_std(&wpf->ctrls, &wpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT, 255 0, 255, 1, 255); 256 257 wpf->entity.subdev.ctrl_handler = &wpf->ctrls; 258 259 if (wpf->ctrls.error) { 260 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n", 261 index); 262 ret = wpf->ctrls.error; 263 goto error; 264 } 265 266 /* Initialize the video device. */ 267 video = &wpf->video; 268 269 video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; 270 video->vsp1 = vsp1; 271 video->ops = &wpf_vdev_ops; 272 273 ret = vsp1_video_init(video, &wpf->entity); 274 if (ret < 0) 275 goto error; 276 277 wpf->entity.video = video; 278 279 /* Connect the video device to the WPF. All connections are immutable 280 * except for the WPF0 source link if a LIF is present. 281 */ 282 flags = MEDIA_LNK_FL_ENABLED; 283 if (!(vsp1->pdata->features & VSP1_HAS_LIF) || index != 0) 284 flags |= MEDIA_LNK_FL_IMMUTABLE; 285 286 ret = media_entity_create_link(&wpf->entity.subdev.entity, 287 RWPF_PAD_SOURCE, 288 &wpf->video.video.entity, 0, flags); 289 if (ret < 0) 290 goto error; 291 292 wpf->entity.sink = &wpf->video.video.entity; 293 294 return wpf; 295 296error: 297 vsp1_entity_destroy(&wpf->entity); 298 return ERR_PTR(ret); 299} 300