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1// SPDX-License-Identifier: GPL-2.02/*3 * Allwinner sun8i DE2 rotation driver4 *5 * Copyright (C) 2020 Jernej Skrabec <jernej.skrabec@siol.net>6 */7 8#include <linux/clk.h>9#include <linux/interrupt.h>10#include <linux/io.h>11#include <linux/iopoll.h>12#include <linux/mod_devicetable.h>13#include <linux/module.h>14#include <linux/platform_device.h>15#include <linux/pm_runtime.h>16#include <linux/reset.h>17 18#include <media/v4l2-device.h>19#include <media/v4l2-event.h>20#include <media/v4l2-ioctl.h>21#include <media/v4l2-mem2mem.h>22 23#include "sun8i-formats.h"24#include "sun8i-rotate.h"25 26static inline u32 rotate_read(struct rotate_dev *dev, u32 reg)27{28 return readl(dev->base + reg);29}30 31static inline void rotate_write(struct rotate_dev *dev, u32 reg, u32 value)32{33 writel(value, dev->base + reg);34}35 36static inline void rotate_set_bits(struct rotate_dev *dev, u32 reg, u32 bits)37{38 writel(readl(dev->base + reg) | bits, dev->base + reg);39}40 41static void rotate_calc_addr_pitch(dma_addr_t buffer,42 u32 bytesperline, u32 height,43 const struct rotate_format *fmt,44 dma_addr_t *addr, u32 *pitch)45{46 u32 size;47 int i;48 49 for (i = 0; i < fmt->planes; i++) {50 pitch[i] = bytesperline;51 addr[i] = buffer;52 if (i > 0)53 pitch[i] /= fmt->hsub / fmt->bpp[i];54 size = pitch[i] * height;55 if (i > 0)56 size /= fmt->vsub;57 buffer += size;58 }59}60 61static void rotate_device_run(void *priv)62{63 struct rotate_ctx *ctx = priv;64 struct rotate_dev *dev = ctx->dev;65 struct vb2_v4l2_buffer *src, *dst;66 const struct rotate_format *fmt;67 dma_addr_t addr[3];68 u32 val, pitch[3];69 70 src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);71 dst = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);72 73 v4l2_m2m_buf_copy_metadata(src, dst, true);74 75 val = ROTATE_GLB_CTL_MODE(ROTATE_MODE_COPY_ROTATE);76 if (ctx->hflip)77 val |= ROTATE_GLB_CTL_HFLIP;78 if (ctx->vflip)79 val |= ROTATE_GLB_CTL_VFLIP;80 val |= ROTATE_GLB_CTL_ROTATION(ctx->rotate / 90);81 if (ctx->rotate != 90 && ctx->rotate != 270)82 val |= ROTATE_GLB_CTL_BURST_LEN(ROTATE_BURST_64);83 else84 val |= ROTATE_GLB_CTL_BURST_LEN(ROTATE_BURST_8);85 rotate_write(dev, ROTATE_GLB_CTL, val);86 87 fmt = rotate_find_format(ctx->src_fmt.pixelformat);88 if (!fmt)89 return;90 91 rotate_write(dev, ROTATE_IN_FMT, ROTATE_IN_FMT_FORMAT(fmt->hw_format));92 93 rotate_calc_addr_pitch(vb2_dma_contig_plane_dma_addr(&src->vb2_buf, 0),94 ctx->src_fmt.bytesperline, ctx->src_fmt.height,95 fmt, addr, pitch);96 97 rotate_write(dev, ROTATE_IN_SIZE,98 ROTATE_SIZE(ctx->src_fmt.width, ctx->src_fmt.height));99 100 rotate_write(dev, ROTATE_IN_PITCH0, pitch[0]);101 rotate_write(dev, ROTATE_IN_PITCH1, pitch[1]);102 rotate_write(dev, ROTATE_IN_PITCH2, pitch[2]);103 104 rotate_write(dev, ROTATE_IN_ADDRL0, addr[0]);105 rotate_write(dev, ROTATE_IN_ADDRL1, addr[1]);106 rotate_write(dev, ROTATE_IN_ADDRL2, addr[2]);107 108 rotate_write(dev, ROTATE_IN_ADDRH0, 0);109 rotate_write(dev, ROTATE_IN_ADDRH1, 0);110 rotate_write(dev, ROTATE_IN_ADDRH2, 0);111 112 fmt = rotate_find_format(ctx->dst_fmt.pixelformat);113 if (!fmt)114 return;115 116 rotate_calc_addr_pitch(vb2_dma_contig_plane_dma_addr(&dst->vb2_buf, 0),117 ctx->dst_fmt.bytesperline, ctx->dst_fmt.height,118 fmt, addr, pitch);119 120 rotate_write(dev, ROTATE_OUT_SIZE,121 ROTATE_SIZE(ctx->dst_fmt.width, ctx->dst_fmt.height));122 123 rotate_write(dev, ROTATE_OUT_PITCH0, pitch[0]);124 rotate_write(dev, ROTATE_OUT_PITCH1, pitch[1]);125 rotate_write(dev, ROTATE_OUT_PITCH2, pitch[2]);126 127 rotate_write(dev, ROTATE_OUT_ADDRL0, addr[0]);128 rotate_write(dev, ROTATE_OUT_ADDRL1, addr[1]);129 rotate_write(dev, ROTATE_OUT_ADDRL2, addr[2]);130 131 rotate_write(dev, ROTATE_OUT_ADDRH0, 0);132 rotate_write(dev, ROTATE_OUT_ADDRH1, 0);133 rotate_write(dev, ROTATE_OUT_ADDRH2, 0);134 135 rotate_set_bits(dev, ROTATE_INT, ROTATE_INT_FINISH_IRQ_EN);136 rotate_set_bits(dev, ROTATE_GLB_CTL, ROTATE_GLB_CTL_START);137}138 139static irqreturn_t rotate_irq(int irq, void *data)140{141 struct vb2_v4l2_buffer *buffer;142 struct rotate_dev *dev = data;143 struct rotate_ctx *ctx;144 unsigned int val;145 146 ctx = v4l2_m2m_get_curr_priv(dev->m2m_dev);147 if (!ctx) {148 v4l2_err(&dev->v4l2_dev,149 "Instance released before the end of transaction\n");150 return IRQ_NONE;151 }152 153 val = rotate_read(dev, ROTATE_INT);154 if (!(val & ROTATE_INT_FINISH_IRQ))155 return IRQ_NONE;156 157 /* clear flag and disable irq */158 rotate_write(dev, ROTATE_INT, ROTATE_INT_FINISH_IRQ);159 160 buffer = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);161 v4l2_m2m_buf_done(buffer, VB2_BUF_STATE_DONE);162 163 buffer = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);164 v4l2_m2m_buf_done(buffer, VB2_BUF_STATE_DONE);165 166 v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);167 168 return IRQ_HANDLED;169}170 171static inline struct rotate_ctx *rotate_file2ctx(struct file *file)172{173 return container_of(file->private_data, struct rotate_ctx, fh);174}175 176static void rotate_prepare_format(struct v4l2_pix_format *pix_fmt)177{178 unsigned int height, width, alignment, sizeimage, size, bpl;179 const struct rotate_format *fmt;180 int i;181 182 fmt = rotate_find_format(pix_fmt->pixelformat);183 if (!fmt)184 return;185 186 width = ALIGN(pix_fmt->width, fmt->hsub);187 height = ALIGN(pix_fmt->height, fmt->vsub);188 189 /* all pitches have to be 16 byte aligned */190 alignment = 16;191 if (fmt->planes > 1)192 alignment *= fmt->hsub / fmt->bpp[1];193 bpl = ALIGN(width * fmt->bpp[0], alignment);194 195 sizeimage = 0;196 for (i = 0; i < fmt->planes; i++) {197 size = bpl * height;198 if (i > 0) {199 size *= fmt->bpp[i];200 size /= fmt->hsub;201 size /= fmt->vsub;202 }203 sizeimage += size;204 }205 206 pix_fmt->width = width;207 pix_fmt->height = height;208 pix_fmt->bytesperline = bpl;209 pix_fmt->sizeimage = sizeimage;210}211 212static int rotate_querycap(struct file *file, void *priv,213 struct v4l2_capability *cap)214{215 strscpy(cap->driver, ROTATE_NAME, sizeof(cap->driver));216 strscpy(cap->card, ROTATE_NAME, sizeof(cap->card));217 snprintf(cap->bus_info, sizeof(cap->bus_info),218 "platform:%s", ROTATE_NAME);219 220 return 0;221}222 223static int rotate_enum_fmt_vid_cap(struct file *file, void *priv,224 struct v4l2_fmtdesc *f)225{226 return rotate_enum_fmt(f, true);227}228 229static int rotate_enum_fmt_vid_out(struct file *file, void *priv,230 struct v4l2_fmtdesc *f)231{232 return rotate_enum_fmt(f, false);233}234 235static int rotate_enum_framesizes(struct file *file, void *priv,236 struct v4l2_frmsizeenum *fsize)237{238 const struct rotate_format *fmt;239 240 if (fsize->index != 0)241 return -EINVAL;242 243 fmt = rotate_find_format(fsize->pixel_format);244 if (!fmt)245 return -EINVAL;246 247 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;248 fsize->stepwise.min_width = ROTATE_MIN_WIDTH;249 fsize->stepwise.min_height = ROTATE_MIN_HEIGHT;250 fsize->stepwise.max_width = ROTATE_MAX_WIDTH;251 fsize->stepwise.max_height = ROTATE_MAX_HEIGHT;252 fsize->stepwise.step_width = fmt->hsub;253 fsize->stepwise.step_height = fmt->vsub;254 255 return 0;256}257 258static int rotate_set_cap_format(struct rotate_ctx *ctx,259 struct v4l2_pix_format *f,260 u32 rotate)261{262 const struct rotate_format *fmt;263 264 fmt = rotate_find_format(ctx->src_fmt.pixelformat);265 if (!fmt)266 return -EINVAL;267 268 if (fmt->flags & ROTATE_FLAG_YUV)269 f->pixelformat = V4L2_PIX_FMT_YUV420;270 else271 f->pixelformat = ctx->src_fmt.pixelformat;272 273 f->field = V4L2_FIELD_NONE;274 275 if (rotate == 90 || rotate == 270) {276 f->width = ctx->src_fmt.height;277 f->height = ctx->src_fmt.width;278 } else {279 f->width = ctx->src_fmt.width;280 f->height = ctx->src_fmt.height;281 }282 283 rotate_prepare_format(f);284 285 return 0;286}287 288static int rotate_g_fmt_vid_cap(struct file *file, void *priv,289 struct v4l2_format *f)290{291 struct rotate_ctx *ctx = rotate_file2ctx(file);292 293 f->fmt.pix = ctx->dst_fmt;294 295 return 0;296}297 298static int rotate_g_fmt_vid_out(struct file *file, void *priv,299 struct v4l2_format *f)300{301 struct rotate_ctx *ctx = rotate_file2ctx(file);302 303 f->fmt.pix = ctx->src_fmt;304 305 return 0;306}307 308static int rotate_try_fmt_vid_cap(struct file *file, void *priv,309 struct v4l2_format *f)310{311 struct rotate_ctx *ctx = rotate_file2ctx(file);312 313 return rotate_set_cap_format(ctx, &f->fmt.pix, ctx->rotate);314}315 316static int rotate_try_fmt_vid_out(struct file *file, void *priv,317 struct v4l2_format *f)318{319 if (!rotate_find_format(f->fmt.pix.pixelformat))320 f->fmt.pix.pixelformat = V4L2_PIX_FMT_ARGB32;321 322 if (f->fmt.pix.width < ROTATE_MIN_WIDTH)323 f->fmt.pix.width = ROTATE_MIN_WIDTH;324 if (f->fmt.pix.height < ROTATE_MIN_HEIGHT)325 f->fmt.pix.height = ROTATE_MIN_HEIGHT;326 327 if (f->fmt.pix.width > ROTATE_MAX_WIDTH)328 f->fmt.pix.width = ROTATE_MAX_WIDTH;329 if (f->fmt.pix.height > ROTATE_MAX_HEIGHT)330 f->fmt.pix.height = ROTATE_MAX_HEIGHT;331 332 f->fmt.pix.field = V4L2_FIELD_NONE;333 334 rotate_prepare_format(&f->fmt.pix);335 336 return 0;337}338 339static int rotate_s_fmt_vid_cap(struct file *file, void *priv,340 struct v4l2_format *f)341{342 struct rotate_ctx *ctx = rotate_file2ctx(file);343 struct vb2_queue *vq;344 int ret;345 346 ret = rotate_try_fmt_vid_cap(file, priv, f);347 if (ret)348 return ret;349 350 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);351 if (vb2_is_busy(vq))352 return -EBUSY;353 354 ctx->dst_fmt = f->fmt.pix;355 356 return 0;357}358 359static int rotate_s_fmt_vid_out(struct file *file, void *priv,360 struct v4l2_format *f)361{362 struct rotate_ctx *ctx = rotate_file2ctx(file);363 struct vb2_queue *vq;364 int ret;365 366 ret = rotate_try_fmt_vid_out(file, priv, f);367 if (ret)368 return ret;369 370 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);371 if (vb2_is_busy(vq))372 return -EBUSY;373 374 /*375 * Capture queue has to be also checked, because format and size376 * depends on output format and size.377 */378 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);379 if (vb2_is_busy(vq))380 return -EBUSY;381 382 ctx->src_fmt = f->fmt.pix;383 384 /* Propagate colorspace information to capture. */385 ctx->dst_fmt.colorspace = f->fmt.pix.colorspace;386 ctx->dst_fmt.xfer_func = f->fmt.pix.xfer_func;387 ctx->dst_fmt.ycbcr_enc = f->fmt.pix.ycbcr_enc;388 ctx->dst_fmt.quantization = f->fmt.pix.quantization;389 390 return rotate_set_cap_format(ctx, &ctx->dst_fmt, ctx->rotate);391}392 393static const struct v4l2_ioctl_ops rotate_ioctl_ops = {394 .vidioc_querycap = rotate_querycap,395 396 .vidioc_enum_framesizes = rotate_enum_framesizes,397 398 .vidioc_enum_fmt_vid_cap = rotate_enum_fmt_vid_cap,399 .vidioc_g_fmt_vid_cap = rotate_g_fmt_vid_cap,400 .vidioc_try_fmt_vid_cap = rotate_try_fmt_vid_cap,401 .vidioc_s_fmt_vid_cap = rotate_s_fmt_vid_cap,402 403 .vidioc_enum_fmt_vid_out = rotate_enum_fmt_vid_out,404 .vidioc_g_fmt_vid_out = rotate_g_fmt_vid_out,405 .vidioc_try_fmt_vid_out = rotate_try_fmt_vid_out,406 .vidioc_s_fmt_vid_out = rotate_s_fmt_vid_out,407 408 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,409 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,410 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,411 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,412 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,413 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,414 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,415 416 .vidioc_streamon = v4l2_m2m_ioctl_streamon,417 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,418 419 .vidioc_log_status = v4l2_ctrl_log_status,420 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,421 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,422};423 424static int rotate_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,425 unsigned int *nplanes, unsigned int sizes[],426 struct device *alloc_devs[])427{428 struct rotate_ctx *ctx = vb2_get_drv_priv(vq);429 struct v4l2_pix_format *pix_fmt;430 431 if (V4L2_TYPE_IS_OUTPUT(vq->type))432 pix_fmt = &ctx->src_fmt;433 else434 pix_fmt = &ctx->dst_fmt;435 436 if (*nplanes) {437 if (sizes[0] < pix_fmt->sizeimage)438 return -EINVAL;439 } else {440 sizes[0] = pix_fmt->sizeimage;441 *nplanes = 1;442 }443 444 return 0;445}446 447static int rotate_buf_prepare(struct vb2_buffer *vb)448{449 struct vb2_queue *vq = vb->vb2_queue;450 struct rotate_ctx *ctx = vb2_get_drv_priv(vq);451 struct v4l2_pix_format *pix_fmt;452 453 if (V4L2_TYPE_IS_OUTPUT(vq->type))454 pix_fmt = &ctx->src_fmt;455 else456 pix_fmt = &ctx->dst_fmt;457 458 if (vb2_plane_size(vb, 0) < pix_fmt->sizeimage)459 return -EINVAL;460 461 vb2_set_plane_payload(vb, 0, pix_fmt->sizeimage);462 463 return 0;464}465 466static void rotate_buf_queue(struct vb2_buffer *vb)467{468 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);469 struct rotate_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);470 471 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);472}473 474static void rotate_queue_cleanup(struct vb2_queue *vq, u32 state)475{476 struct rotate_ctx *ctx = vb2_get_drv_priv(vq);477 struct vb2_v4l2_buffer *vbuf;478 479 do {480 if (V4L2_TYPE_IS_OUTPUT(vq->type))481 vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);482 else483 vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);484 485 if (vbuf)486 v4l2_m2m_buf_done(vbuf, state);487 } while (vbuf);488}489 490static int rotate_start_streaming(struct vb2_queue *vq, unsigned int count)491{492 if (V4L2_TYPE_IS_OUTPUT(vq->type)) {493 struct rotate_ctx *ctx = vb2_get_drv_priv(vq);494 struct device *dev = ctx->dev->dev;495 int ret;496 497 ret = pm_runtime_resume_and_get(dev);498 if (ret < 0) {499 dev_err(dev, "Failed to enable module\n");500 501 return ret;502 }503 }504 505 return 0;506}507 508static void rotate_stop_streaming(struct vb2_queue *vq)509{510 if (V4L2_TYPE_IS_OUTPUT(vq->type)) {511 struct rotate_ctx *ctx = vb2_get_drv_priv(vq);512 513 pm_runtime_put(ctx->dev->dev);514 }515 516 rotate_queue_cleanup(vq, VB2_BUF_STATE_ERROR);517}518 519static const struct vb2_ops rotate_qops = {520 .queue_setup = rotate_queue_setup,521 .buf_prepare = rotate_buf_prepare,522 .buf_queue = rotate_buf_queue,523 .start_streaming = rotate_start_streaming,524 .stop_streaming = rotate_stop_streaming,525 .wait_prepare = vb2_ops_wait_prepare,526 .wait_finish = vb2_ops_wait_finish,527};528 529static int rotate_queue_init(void *priv, struct vb2_queue *src_vq,530 struct vb2_queue *dst_vq)531{532 struct rotate_ctx *ctx = priv;533 int ret;534 535 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;536 src_vq->io_modes = VB2_MMAP | VB2_DMABUF;537 src_vq->drv_priv = ctx;538 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);539 src_vq->min_queued_buffers = 1;540 src_vq->ops = &rotate_qops;541 src_vq->mem_ops = &vb2_dma_contig_memops;542 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;543 src_vq->lock = &ctx->dev->dev_mutex;544 src_vq->dev = ctx->dev->dev;545 546 ret = vb2_queue_init(src_vq);547 if (ret)548 return ret;549 550 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;551 dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;552 dst_vq->drv_priv = ctx;553 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);554 dst_vq->min_queued_buffers = 2;555 dst_vq->ops = &rotate_qops;556 dst_vq->mem_ops = &vb2_dma_contig_memops;557 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;558 dst_vq->lock = &ctx->dev->dev_mutex;559 dst_vq->dev = ctx->dev->dev;560 561 ret = vb2_queue_init(dst_vq);562 if (ret)563 return ret;564 565 return 0;566}567 568static int rotate_s_ctrl(struct v4l2_ctrl *ctrl)569{570 struct rotate_ctx *ctx = container_of(ctrl->handler,571 struct rotate_ctx,572 ctrl_handler);573 struct v4l2_pix_format fmt;574 575 switch (ctrl->id) {576 case V4L2_CID_HFLIP:577 ctx->hflip = ctrl->val;578 break;579 case V4L2_CID_VFLIP:580 ctx->vflip = ctrl->val;581 break;582 case V4L2_CID_ROTATE:583 rotate_set_cap_format(ctx, &fmt, ctrl->val);584 585 /* Check if capture format needs to be changed */586 if (fmt.width != ctx->dst_fmt.width ||587 fmt.height != ctx->dst_fmt.height ||588 fmt.bytesperline != ctx->dst_fmt.bytesperline ||589 fmt.sizeimage != ctx->dst_fmt.sizeimage) {590 struct vb2_queue *vq;591 592 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,593 V4L2_BUF_TYPE_VIDEO_CAPTURE);594 if (vb2_is_busy(vq))595 return -EBUSY;596 597 rotate_set_cap_format(ctx, &ctx->dst_fmt, ctrl->val);598 }599 600 ctx->rotate = ctrl->val;601 break;602 default:603 return -EINVAL;604 }605 606 return 0;607}608 609static const struct v4l2_ctrl_ops rotate_ctrl_ops = {610 .s_ctrl = rotate_s_ctrl,611};612 613static int rotate_setup_ctrls(struct rotate_ctx *ctx)614{615 v4l2_ctrl_handler_init(&ctx->ctrl_handler, 3);616 617 v4l2_ctrl_new_std(&ctx->ctrl_handler, &rotate_ctrl_ops,618 V4L2_CID_HFLIP, 0, 1, 1, 0);619 620 v4l2_ctrl_new_std(&ctx->ctrl_handler, &rotate_ctrl_ops,621 V4L2_CID_VFLIP, 0, 1, 1, 0);622 623 v4l2_ctrl_new_std(&ctx->ctrl_handler, &rotate_ctrl_ops,624 V4L2_CID_ROTATE, 0, 270, 90, 0);625 626 if (ctx->ctrl_handler.error) {627 int err = ctx->ctrl_handler.error;628 629 v4l2_err(&ctx->dev->v4l2_dev, "control setup failed!\n");630 v4l2_ctrl_handler_free(&ctx->ctrl_handler);631 632 return err;633 }634 635 return v4l2_ctrl_handler_setup(&ctx->ctrl_handler);636}637 638static int rotate_open(struct file *file)639{640 struct rotate_dev *dev = video_drvdata(file);641 struct rotate_ctx *ctx = NULL;642 int ret;643 644 if (mutex_lock_interruptible(&dev->dev_mutex))645 return -ERESTARTSYS;646 647 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);648 if (!ctx) {649 mutex_unlock(&dev->dev_mutex);650 return -ENOMEM;651 }652 653 /* default output format */654 ctx->src_fmt.pixelformat = V4L2_PIX_FMT_ARGB32;655 ctx->src_fmt.field = V4L2_FIELD_NONE;656 ctx->src_fmt.width = 640;657 ctx->src_fmt.height = 480;658 rotate_prepare_format(&ctx->src_fmt);659 660 /* default capture format */661 rotate_set_cap_format(ctx, &ctx->dst_fmt, ctx->rotate);662 663 v4l2_fh_init(&ctx->fh, video_devdata(file));664 file->private_data = &ctx->fh;665 ctx->dev = dev;666 667 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx,668 &rotate_queue_init);669 if (IS_ERR(ctx->fh.m2m_ctx)) {670 ret = PTR_ERR(ctx->fh.m2m_ctx);671 goto err_free;672 }673 674 v4l2_fh_add(&ctx->fh);675 676 ret = rotate_setup_ctrls(ctx);677 if (ret)678 goto err_free;679 680 ctx->fh.ctrl_handler = &ctx->ctrl_handler;681 682 mutex_unlock(&dev->dev_mutex);683 684 return 0;685 686err_free:687 kfree(ctx);688 mutex_unlock(&dev->dev_mutex);689 690 return ret;691}692 693static int rotate_release(struct file *file)694{695 struct rotate_dev *dev = video_drvdata(file);696 struct rotate_ctx *ctx = container_of(file->private_data,697 struct rotate_ctx, fh);698 699 mutex_lock(&dev->dev_mutex);700 701 v4l2_ctrl_handler_free(&ctx->ctrl_handler);702 v4l2_fh_del(&ctx->fh);703 v4l2_fh_exit(&ctx->fh);704 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);705 706 kfree(ctx);707 708 mutex_unlock(&dev->dev_mutex);709 710 return 0;711}712 713static const struct v4l2_file_operations rotate_fops = {714 .owner = THIS_MODULE,715 .open = rotate_open,716 .release = rotate_release,717 .poll = v4l2_m2m_fop_poll,718 .unlocked_ioctl = video_ioctl2,719 .mmap = v4l2_m2m_fop_mmap,720};721 722static const struct video_device rotate_video_device = {723 .name = ROTATE_NAME,724 .vfl_dir = VFL_DIR_M2M,725 .fops = &rotate_fops,726 .ioctl_ops = &rotate_ioctl_ops,727 .minor = -1,728 .release = video_device_release_empty,729 .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,730};731 732static const struct v4l2_m2m_ops rotate_m2m_ops = {733 .device_run = rotate_device_run,734};735 736static int rotate_probe(struct platform_device *pdev)737{738 struct rotate_dev *dev;739 struct video_device *vfd;740 int irq, ret;741 742 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);743 if (!dev)744 return -ENOMEM;745 746 dev->vfd = rotate_video_device;747 dev->dev = &pdev->dev;748 749 irq = platform_get_irq(pdev, 0);750 if (irq <= 0)751 return irq;752 753 ret = devm_request_irq(dev->dev, irq, rotate_irq,754 0, dev_name(dev->dev), dev);755 if (ret) {756 dev_err(dev->dev, "Failed to request IRQ\n");757 758 return ret;759 }760 761 dev->base = devm_platform_ioremap_resource(pdev, 0);762 if (IS_ERR(dev->base))763 return PTR_ERR(dev->base);764 765 dev->bus_clk = devm_clk_get(dev->dev, "bus");766 if (IS_ERR(dev->bus_clk)) {767 dev_err(dev->dev, "Failed to get bus clock\n");768 769 return PTR_ERR(dev->bus_clk);770 }771 772 dev->mod_clk = devm_clk_get(dev->dev, "mod");773 if (IS_ERR(dev->mod_clk)) {774 dev_err(dev->dev, "Failed to get mod clock\n");775 776 return PTR_ERR(dev->mod_clk);777 }778 779 dev->rstc = devm_reset_control_get(dev->dev, NULL);780 if (IS_ERR(dev->rstc)) {781 dev_err(dev->dev, "Failed to get reset control\n");782 783 return PTR_ERR(dev->rstc);784 }785 786 mutex_init(&dev->dev_mutex);787 788 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);789 if (ret) {790 dev_err(dev->dev, "Failed to register V4L2 device\n");791 792 return ret;793 }794 795 vfd = &dev->vfd;796 vfd->lock = &dev->dev_mutex;797 vfd->v4l2_dev = &dev->v4l2_dev;798 799 snprintf(vfd->name, sizeof(vfd->name), "%s",800 rotate_video_device.name);801 video_set_drvdata(vfd, dev);802 803 ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);804 if (ret) {805 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");806 807 goto err_v4l2;808 }809 810 v4l2_info(&dev->v4l2_dev,811 "Device registered as /dev/video%d\n", vfd->num);812 813 dev->m2m_dev = v4l2_m2m_init(&rotate_m2m_ops);814 if (IS_ERR(dev->m2m_dev)) {815 v4l2_err(&dev->v4l2_dev,816 "Failed to initialize V4L2 M2M device\n");817 ret = PTR_ERR(dev->m2m_dev);818 819 goto err_video;820 }821 822 platform_set_drvdata(pdev, dev);823 824 pm_runtime_enable(dev->dev);825 826 return 0;827 828err_video:829 video_unregister_device(&dev->vfd);830err_v4l2:831 v4l2_device_unregister(&dev->v4l2_dev);832 833 return ret;834}835 836static void rotate_remove(struct platform_device *pdev)837{838 struct rotate_dev *dev = platform_get_drvdata(pdev);839 840 v4l2_m2m_release(dev->m2m_dev);841 video_unregister_device(&dev->vfd);842 v4l2_device_unregister(&dev->v4l2_dev);843 844 pm_runtime_force_suspend(&pdev->dev);845}846 847static int rotate_runtime_resume(struct device *device)848{849 struct rotate_dev *dev = dev_get_drvdata(device);850 int ret;851 852 ret = clk_prepare_enable(dev->bus_clk);853 if (ret) {854 dev_err(dev->dev, "Failed to enable bus clock\n");855 856 return ret;857 }858 859 ret = clk_prepare_enable(dev->mod_clk);860 if (ret) {861 dev_err(dev->dev, "Failed to enable mod clock\n");862 863 goto err_bus_clk;864 }865 866 ret = reset_control_deassert(dev->rstc);867 if (ret) {868 dev_err(dev->dev, "Failed to apply reset\n");869 870 goto err_mod_clk;871 }872 873 return 0;874 875err_mod_clk:876 clk_disable_unprepare(dev->mod_clk);877err_bus_clk:878 clk_disable_unprepare(dev->bus_clk);879 880 return ret;881}882 883static int rotate_runtime_suspend(struct device *device)884{885 struct rotate_dev *dev = dev_get_drvdata(device);886 887 reset_control_assert(dev->rstc);888 889 clk_disable_unprepare(dev->mod_clk);890 clk_disable_unprepare(dev->bus_clk);891 892 return 0;893}894 895static const struct of_device_id rotate_dt_match[] = {896 { .compatible = "allwinner,sun8i-a83t-de2-rotate" },897 { /* sentinel */ }898};899MODULE_DEVICE_TABLE(of, rotate_dt_match);900 901static const struct dev_pm_ops rotate_pm_ops = {902 .runtime_resume = rotate_runtime_resume,903 .runtime_suspend = rotate_runtime_suspend,904};905 906static struct platform_driver rotate_driver = {907 .probe = rotate_probe,908 .remove_new = rotate_remove,909 .driver = {910 .name = ROTATE_NAME,911 .of_match_table = rotate_dt_match,912 .pm = &rotate_pm_ops,913 },914};915module_platform_driver(rotate_driver);916 917MODULE_LICENSE("GPL v2");918MODULE_AUTHOR("Jernej Skrabec <jernej.skrabec@siol.net>");919MODULE_DESCRIPTION("Allwinner DE2 rotate driver");920