| /* |
| * vsp1_bru.c -- R-Car VSP1 Blend ROP Unit |
| * |
| * Copyright (C) 2013 Renesas Corporation |
| * |
| * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/device.h> |
| #include <linux/gfp.h> |
| |
| #include <media/v4l2-subdev.h> |
| |
| #include "vsp1.h" |
| #include "vsp1_bru.h" |
| #include "vsp1_dl.h" |
| #include "vsp1_pipe.h" |
| #include "vsp1_rwpf.h" |
| #include "vsp1_video.h" |
| |
| #define BRU_MIN_SIZE 1U |
| #define BRU_MAX_SIZE 8190U |
| |
| /* ----------------------------------------------------------------------------- |
| * Device Access |
| */ |
| |
| static inline void vsp1_bru_write(struct vsp1_bru *bru, struct vsp1_dl_list *dl, |
| u32 reg, u32 data) |
| { |
| vsp1_dl_list_write(dl, reg, data); |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * Controls |
| */ |
| |
| static int bru_s_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct vsp1_bru *bru = |
| container_of(ctrl->handler, struct vsp1_bru, ctrls); |
| |
| switch (ctrl->id) { |
| case V4L2_CID_BG_COLOR: |
| bru->bgcolor = ctrl->val; |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static const struct v4l2_ctrl_ops bru_ctrl_ops = { |
| .s_ctrl = bru_s_ctrl, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * V4L2 Subdevice Operations |
| */ |
| |
| /* |
| * The BRU can't perform format conversion, all sink and source formats must be |
| * identical. We pick the format on the first sink pad (pad 0) and propagate it |
| * to all other pads. |
| */ |
| |
| static int bru_enum_mbus_code(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_mbus_code_enum *code) |
| { |
| static const unsigned int codes[] = { |
| MEDIA_BUS_FMT_ARGB8888_1X32, |
| MEDIA_BUS_FMT_AYUV8_1X32, |
| }; |
| |
| return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes, |
| ARRAY_SIZE(codes)); |
| } |
| |
| static int bru_enum_frame_size(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_frame_size_enum *fse) |
| { |
| if (fse->index) |
| return -EINVAL; |
| |
| if (fse->code != MEDIA_BUS_FMT_ARGB8888_1X32 && |
| fse->code != MEDIA_BUS_FMT_AYUV8_1X32) |
| return -EINVAL; |
| |
| fse->min_width = BRU_MIN_SIZE; |
| fse->max_width = BRU_MAX_SIZE; |
| fse->min_height = BRU_MIN_SIZE; |
| fse->max_height = BRU_MAX_SIZE; |
| |
| return 0; |
| } |
| |
| static struct v4l2_rect *bru_get_compose(struct vsp1_bru *bru, |
| struct v4l2_subdev_pad_config *cfg, |
| unsigned int pad) |
| { |
| return v4l2_subdev_get_try_compose(&bru->entity.subdev, cfg, pad); |
| } |
| |
| static void bru_try_format(struct vsp1_bru *bru, |
| struct v4l2_subdev_pad_config *config, |
| unsigned int pad, struct v4l2_mbus_framefmt *fmt) |
| { |
| struct v4l2_mbus_framefmt *format; |
| |
| switch (pad) { |
| case BRU_PAD_SINK(0): |
| /* Default to YUV if the requested format is not supported. */ |
| if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 && |
| fmt->code != MEDIA_BUS_FMT_AYUV8_1X32) |
| fmt->code = MEDIA_BUS_FMT_AYUV8_1X32; |
| break; |
| |
| default: |
| /* The BRU can't perform format conversion. */ |
| format = vsp1_entity_get_pad_format(&bru->entity, config, |
| BRU_PAD_SINK(0)); |
| fmt->code = format->code; |
| break; |
| } |
| |
| fmt->width = clamp(fmt->width, BRU_MIN_SIZE, BRU_MAX_SIZE); |
| fmt->height = clamp(fmt->height, BRU_MIN_SIZE, BRU_MAX_SIZE); |
| fmt->field = V4L2_FIELD_NONE; |
| fmt->colorspace = V4L2_COLORSPACE_SRGB; |
| } |
| |
| static int bru_set_format(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_format *fmt) |
| { |
| struct vsp1_bru *bru = to_bru(subdev); |
| struct v4l2_subdev_pad_config *config; |
| struct v4l2_mbus_framefmt *format; |
| int ret = 0; |
| |
| mutex_lock(&bru->entity.lock); |
| |
| config = vsp1_entity_get_pad_config(&bru->entity, cfg, fmt->which); |
| if (!config) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| bru_try_format(bru, config, fmt->pad, &fmt->format); |
| |
| format = vsp1_entity_get_pad_format(&bru->entity, config, fmt->pad); |
| *format = fmt->format; |
| |
| /* Reset the compose rectangle */ |
| if (fmt->pad != bru->entity.source_pad) { |
| struct v4l2_rect *compose; |
| |
| compose = bru_get_compose(bru, config, fmt->pad); |
| compose->left = 0; |
| compose->top = 0; |
| compose->width = format->width; |
| compose->height = format->height; |
| } |
| |
| /* Propagate the format code to all pads */ |
| if (fmt->pad == BRU_PAD_SINK(0)) { |
| unsigned int i; |
| |
| for (i = 0; i <= bru->entity.source_pad; ++i) { |
| format = vsp1_entity_get_pad_format(&bru->entity, |
| config, i); |
| format->code = fmt->format.code; |
| } |
| } |
| |
| done: |
| mutex_unlock(&bru->entity.lock); |
| return ret; |
| } |
| |
| static int bru_get_selection(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_selection *sel) |
| { |
| struct vsp1_bru *bru = to_bru(subdev); |
| struct v4l2_subdev_pad_config *config; |
| |
| if (sel->pad == bru->entity.source_pad) |
| return -EINVAL; |
| |
| switch (sel->target) { |
| case V4L2_SEL_TGT_COMPOSE_BOUNDS: |
| sel->r.left = 0; |
| sel->r.top = 0; |
| sel->r.width = BRU_MAX_SIZE; |
| sel->r.height = BRU_MAX_SIZE; |
| return 0; |
| |
| case V4L2_SEL_TGT_COMPOSE: |
| config = vsp1_entity_get_pad_config(&bru->entity, cfg, |
| sel->which); |
| if (!config) |
| return -EINVAL; |
| |
| mutex_lock(&bru->entity.lock); |
| sel->r = *bru_get_compose(bru, config, sel->pad); |
| mutex_unlock(&bru->entity.lock); |
| return 0; |
| |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int bru_set_selection(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_selection *sel) |
| { |
| struct vsp1_bru *bru = to_bru(subdev); |
| struct v4l2_subdev_pad_config *config; |
| struct v4l2_mbus_framefmt *format; |
| struct v4l2_rect *compose; |
| int ret = 0; |
| |
| if (sel->pad == bru->entity.source_pad) |
| return -EINVAL; |
| |
| if (sel->target != V4L2_SEL_TGT_COMPOSE) |
| return -EINVAL; |
| |
| mutex_lock(&bru->entity.lock); |
| |
| config = vsp1_entity_get_pad_config(&bru->entity, cfg, sel->which); |
| if (!config) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| /* |
| * The compose rectangle top left corner must be inside the output |
| * frame. |
| */ |
| format = vsp1_entity_get_pad_format(&bru->entity, config, |
| bru->entity.source_pad); |
| sel->r.left = clamp_t(unsigned int, sel->r.left, 0, format->width - 1); |
| sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1); |
| |
| /* Scaling isn't supported, the compose rectangle size must be identical |
| * to the sink format size. |
| */ |
| format = vsp1_entity_get_pad_format(&bru->entity, config, sel->pad); |
| sel->r.width = format->width; |
| sel->r.height = format->height; |
| |
| compose = bru_get_compose(bru, config, sel->pad); |
| *compose = sel->r; |
| |
| done: |
| mutex_unlock(&bru->entity.lock); |
| return ret; |
| } |
| |
| static const struct v4l2_subdev_pad_ops bru_pad_ops = { |
| .init_cfg = vsp1_entity_init_cfg, |
| .enum_mbus_code = bru_enum_mbus_code, |
| .enum_frame_size = bru_enum_frame_size, |
| .get_fmt = vsp1_subdev_get_pad_format, |
| .set_fmt = bru_set_format, |
| .get_selection = bru_get_selection, |
| .set_selection = bru_set_selection, |
| }; |
| |
| static const struct v4l2_subdev_ops bru_ops = { |
| .pad = &bru_pad_ops, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * VSP1 Entity Operations |
| */ |
| |
| static void bru_configure(struct vsp1_entity *entity, |
| struct vsp1_pipeline *pipe, |
| struct vsp1_dl_list *dl, |
| enum vsp1_entity_params params) |
| { |
| struct vsp1_bru *bru = to_bru(&entity->subdev); |
| struct v4l2_mbus_framefmt *format; |
| unsigned int flags; |
| unsigned int i; |
| |
| if (params != VSP1_ENTITY_PARAMS_INIT) |
| return; |
| |
| format = vsp1_entity_get_pad_format(&bru->entity, bru->entity.config, |
| bru->entity.source_pad); |
| |
| /* The hardware is extremely flexible but we have no userspace API to |
| * expose all the parameters, nor is it clear whether we would have use |
| * cases for all the supported modes. Let's just harcode the parameters |
| * to sane default values for now. |
| */ |
| |
| /* Disable dithering and enable color data normalization unless the |
| * format at the pipeline output is premultiplied. |
| */ |
| flags = pipe->output ? pipe->output->format.flags : 0; |
| vsp1_bru_write(bru, dl, VI6_BRU_INCTRL, |
| flags & V4L2_PIX_FMT_FLAG_PREMUL_ALPHA ? |
| 0 : VI6_BRU_INCTRL_NRM); |
| |
| /* Set the background position to cover the whole output image and |
| * configure its color. |
| */ |
| vsp1_bru_write(bru, dl, VI6_BRU_VIRRPF_SIZE, |
| (format->width << VI6_BRU_VIRRPF_SIZE_HSIZE_SHIFT) | |
| (format->height << VI6_BRU_VIRRPF_SIZE_VSIZE_SHIFT)); |
| vsp1_bru_write(bru, dl, VI6_BRU_VIRRPF_LOC, 0); |
| |
| vsp1_bru_write(bru, dl, VI6_BRU_VIRRPF_COL, bru->bgcolor | |
| (0xff << VI6_BRU_VIRRPF_COL_A_SHIFT)); |
| |
| /* Route BRU input 1 as SRC input to the ROP unit and configure the ROP |
| * unit with a NOP operation to make BRU input 1 available as the |
| * Blend/ROP unit B SRC input. |
| */ |
| vsp1_bru_write(bru, dl, VI6_BRU_ROP, VI6_BRU_ROP_DSTSEL_BRUIN(1) | |
| VI6_BRU_ROP_CROP(VI6_ROP_NOP) | |
| VI6_BRU_ROP_AROP(VI6_ROP_NOP)); |
| |
| for (i = 0; i < bru->entity.source_pad; ++i) { |
| bool premultiplied = false; |
| u32 ctrl = 0; |
| |
| /* Configure all Blend/ROP units corresponding to an enabled BRU |
| * input for alpha blending. Blend/ROP units corresponding to |
| * disabled BRU inputs are used in ROP NOP mode to ignore the |
| * SRC input. |
| */ |
| if (bru->inputs[i].rpf) { |
| ctrl |= VI6_BRU_CTRL_RBC; |
| |
| premultiplied = bru->inputs[i].rpf->format.flags |
| & V4L2_PIX_FMT_FLAG_PREMUL_ALPHA; |
| } else { |
| ctrl |= VI6_BRU_CTRL_CROP(VI6_ROP_NOP) |
| | VI6_BRU_CTRL_AROP(VI6_ROP_NOP); |
| } |
| |
| /* Select the virtual RPF as the Blend/ROP unit A DST input to |
| * serve as a background color. |
| */ |
| if (i == 0) |
| ctrl |= VI6_BRU_CTRL_DSTSEL_VRPF; |
| |
| /* Route BRU inputs 0 to 3 as SRC inputs to Blend/ROP units A to |
| * D in that order. The Blend/ROP unit B SRC is hardwired to the |
| * ROP unit output, the corresponding register bits must be set |
| * to 0. |
| */ |
| if (i != 1) |
| ctrl |= VI6_BRU_CTRL_SRCSEL_BRUIN(i); |
| |
| vsp1_bru_write(bru, dl, VI6_BRU_CTRL(i), ctrl); |
| |
| /* Harcode the blending formula to |
| * |
| * DSTc = DSTc * (1 - SRCa) + SRCc * SRCa |
| * DSTa = DSTa * (1 - SRCa) + SRCa |
| * |
| * when the SRC input isn't premultiplied, and to |
| * |
| * DSTc = DSTc * (1 - SRCa) + SRCc |
| * DSTa = DSTa * (1 - SRCa) + SRCa |
| * |
| * otherwise. |
| */ |
| vsp1_bru_write(bru, dl, VI6_BRU_BLD(i), |
| VI6_BRU_BLD_CCMDX_255_SRC_A | |
| (premultiplied ? VI6_BRU_BLD_CCMDY_COEFY : |
| VI6_BRU_BLD_CCMDY_SRC_A) | |
| VI6_BRU_BLD_ACMDX_255_SRC_A | |
| VI6_BRU_BLD_ACMDY_COEFY | |
| (0xff << VI6_BRU_BLD_COEFY_SHIFT)); |
| } |
| } |
| |
| static const struct vsp1_entity_operations bru_entity_ops = { |
| .configure = bru_configure, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * Initialization and Cleanup |
| */ |
| |
| struct vsp1_bru *vsp1_bru_create(struct vsp1_device *vsp1) |
| { |
| struct vsp1_bru *bru; |
| int ret; |
| |
| bru = devm_kzalloc(vsp1->dev, sizeof(*bru), GFP_KERNEL); |
| if (bru == NULL) |
| return ERR_PTR(-ENOMEM); |
| |
| bru->entity.ops = &bru_entity_ops; |
| bru->entity.type = VSP1_ENTITY_BRU; |
| |
| ret = vsp1_entity_init(vsp1, &bru->entity, "bru", |
| vsp1->info->num_bru_inputs + 1, &bru_ops, |
| MEDIA_ENT_F_PROC_VIDEO_COMPOSER); |
| if (ret < 0) |
| return ERR_PTR(ret); |
| |
| /* Initialize the control handler. */ |
| v4l2_ctrl_handler_init(&bru->ctrls, 1); |
| v4l2_ctrl_new_std(&bru->ctrls, &bru_ctrl_ops, V4L2_CID_BG_COLOR, |
| 0, 0xffffff, 1, 0); |
| |
| bru->bgcolor = 0; |
| |
| bru->entity.subdev.ctrl_handler = &bru->ctrls; |
| |
| if (bru->ctrls.error) { |
| dev_err(vsp1->dev, "bru: failed to initialize controls\n"); |
| ret = bru->ctrls.error; |
| vsp1_entity_destroy(&bru->entity); |
| return ERR_PTR(ret); |
| } |
| |
| return bru; |
| } |