265 lines
6.8 KiB
C
265 lines
6.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* vsp1_uif.c -- R-Car VSP1 User Logic Interface
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*
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* Copyright (C) 2017-2018 Laurent Pinchart
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*/
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#include <linux/device.h>
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#include <linux/gfp.h>
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#include <linux/sys_soc.h>
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#include <media/media-entity.h>
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#include <media/v4l2-subdev.h>
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#include "vsp1.h"
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#include "vsp1_dl.h"
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#include "vsp1_entity.h"
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#include "vsp1_uif.h"
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#define UIF_MIN_SIZE 4U
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#define UIF_MAX_SIZE 8190U
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/* -----------------------------------------------------------------------------
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* Device Access
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*/
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static inline u32 vsp1_uif_read(struct vsp1_uif *uif, u32 reg)
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{
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return vsp1_read(uif->entity.vsp1,
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uif->entity.index * VI6_UIF_OFFSET + reg);
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}
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static inline void vsp1_uif_write(struct vsp1_uif *uif,
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struct vsp1_dl_body *dlb, u32 reg, u32 data)
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{
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vsp1_dl_body_write(dlb, reg + uif->entity.index * VI6_UIF_OFFSET, data);
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}
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u32 vsp1_uif_get_crc(struct vsp1_uif *uif)
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{
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return vsp1_uif_read(uif, VI6_UIF_DISCOM_DOCMCCRCR);
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}
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/* -----------------------------------------------------------------------------
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* V4L2 Subdevice Pad Operations
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*/
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static const unsigned int uif_codes[] = {
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MEDIA_BUS_FMT_ARGB8888_1X32,
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MEDIA_BUS_FMT_AHSV8888_1X32,
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MEDIA_BUS_FMT_AYUV8_1X32,
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};
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static int uif_enum_mbus_code(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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return vsp1_subdev_enum_mbus_code(subdev, cfg, code, uif_codes,
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ARRAY_SIZE(uif_codes));
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}
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static int uif_enum_frame_size(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_frame_size_enum *fse)
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{
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return vsp1_subdev_enum_frame_size(subdev, cfg, fse, UIF_MIN_SIZE,
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UIF_MIN_SIZE, UIF_MAX_SIZE,
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UIF_MAX_SIZE);
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}
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static int uif_set_format(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *fmt)
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{
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return vsp1_subdev_set_pad_format(subdev, cfg, fmt, uif_codes,
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ARRAY_SIZE(uif_codes),
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UIF_MIN_SIZE, UIF_MIN_SIZE,
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UIF_MAX_SIZE, UIF_MAX_SIZE);
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}
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static int uif_get_selection(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_selection *sel)
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{
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struct vsp1_uif *uif = to_uif(subdev);
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struct v4l2_subdev_pad_config *config;
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struct v4l2_mbus_framefmt *format;
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int ret = 0;
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if (sel->pad != UIF_PAD_SINK)
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return -EINVAL;
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mutex_lock(&uif->entity.lock);
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config = vsp1_entity_get_pad_config(&uif->entity, cfg, sel->which);
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if (!config) {
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ret = -EINVAL;
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goto done;
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}
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switch (sel->target) {
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case V4L2_SEL_TGT_CROP_BOUNDS:
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case V4L2_SEL_TGT_CROP_DEFAULT:
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format = vsp1_entity_get_pad_format(&uif->entity, config,
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UIF_PAD_SINK);
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sel->r.left = 0;
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sel->r.top = 0;
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sel->r.width = format->width;
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sel->r.height = format->height;
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break;
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case V4L2_SEL_TGT_CROP:
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sel->r = *vsp1_entity_get_pad_selection(&uif->entity, config,
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sel->pad, sel->target);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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done:
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mutex_unlock(&uif->entity.lock);
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return ret;
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}
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static int uif_set_selection(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_selection *sel)
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{
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struct vsp1_uif *uif = to_uif(subdev);
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struct v4l2_subdev_pad_config *config;
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struct v4l2_mbus_framefmt *format;
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struct v4l2_rect *selection;
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int ret = 0;
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if (sel->pad != UIF_PAD_SINK ||
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sel->target != V4L2_SEL_TGT_CROP)
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return -EINVAL;
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mutex_lock(&uif->entity.lock);
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config = vsp1_entity_get_pad_config(&uif->entity, cfg, sel->which);
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if (!config) {
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ret = -EINVAL;
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goto done;
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}
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/* The crop rectangle must be inside the input frame. */
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format = vsp1_entity_get_pad_format(&uif->entity, config, UIF_PAD_SINK);
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sel->r.left = clamp_t(unsigned int, sel->r.left, 0, format->width - 1);
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sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1);
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sel->r.width = clamp_t(unsigned int, sel->r.width, UIF_MIN_SIZE,
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format->width - sel->r.left);
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sel->r.height = clamp_t(unsigned int, sel->r.height, UIF_MIN_SIZE,
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format->height - sel->r.top);
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/* Store the crop rectangle. */
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selection = vsp1_entity_get_pad_selection(&uif->entity, config,
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sel->pad, V4L2_SEL_TGT_CROP);
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*selection = sel->r;
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done:
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mutex_unlock(&uif->entity.lock);
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return ret;
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}
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/* -----------------------------------------------------------------------------
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* V4L2 Subdevice Operations
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*/
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static const struct v4l2_subdev_pad_ops uif_pad_ops = {
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.init_cfg = vsp1_entity_init_cfg,
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.enum_mbus_code = uif_enum_mbus_code,
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.enum_frame_size = uif_enum_frame_size,
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.get_fmt = vsp1_subdev_get_pad_format,
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.set_fmt = uif_set_format,
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.get_selection = uif_get_selection,
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.set_selection = uif_set_selection,
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};
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static const struct v4l2_subdev_ops uif_ops = {
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.pad = &uif_pad_ops,
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};
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/* -----------------------------------------------------------------------------
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* VSP1 Entity Operations
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*/
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static void uif_configure_stream(struct vsp1_entity *entity,
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struct vsp1_pipeline *pipe,
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struct vsp1_dl_body *dlb)
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{
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struct vsp1_uif *uif = to_uif(&entity->subdev);
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const struct v4l2_rect *crop;
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unsigned int left;
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unsigned int width;
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vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMPMR,
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VI6_UIF_DISCOM_DOCMPMR_SEL(9));
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crop = vsp1_entity_get_pad_selection(entity, entity->config,
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UIF_PAD_SINK, V4L2_SEL_TGT_CROP);
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left = crop->left;
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width = crop->width;
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/* On M3-W the horizontal coordinates are twice the register value. */
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if (uif->m3w_quirk) {
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left /= 2;
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width /= 2;
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}
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vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPXR, left);
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vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPYR, crop->top);
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vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZXR, width);
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vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZYR, crop->height);
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vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMCR,
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VI6_UIF_DISCOM_DOCMCR_CMPR);
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}
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static const struct vsp1_entity_operations uif_entity_ops = {
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.configure_stream = uif_configure_stream,
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};
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/* -----------------------------------------------------------------------------
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* Initialization and Cleanup
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*/
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static const struct soc_device_attribute vsp1_r8a7796[] = {
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{ .soc_id = "r8a7796" },
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{ /* sentinel */ }
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};
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struct vsp1_uif *vsp1_uif_create(struct vsp1_device *vsp1, unsigned int index)
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{
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struct vsp1_uif *uif;
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char name[6];
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int ret;
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uif = devm_kzalloc(vsp1->dev, sizeof(*uif), GFP_KERNEL);
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if (!uif)
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return ERR_PTR(-ENOMEM);
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if (soc_device_match(vsp1_r8a7796))
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uif->m3w_quirk = true;
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uif->entity.ops = &uif_entity_ops;
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uif->entity.type = VSP1_ENTITY_UIF;
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uif->entity.index = index;
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/* The datasheet names the two UIF instances UIF4 and UIF5. */
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sprintf(name, "uif.%u", index + 4);
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ret = vsp1_entity_init(vsp1, &uif->entity, name, 2, &uif_ops,
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MEDIA_ENT_F_PROC_VIDEO_STATISTICS);
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if (ret < 0)
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return ERR_PTR(ret);
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return uif;
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}
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