diff options
Diffstat (limited to 'drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-parallel.c')
-rw-r--r-- | drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-parallel.c | 440 |
1 files changed, 440 insertions, 0 deletions
diff --git a/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-parallel.c b/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-parallel.c new file mode 100644 index 000000000000..62c5c3331cfe --- /dev/null +++ b/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-parallel.c @@ -0,0 +1,440 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for STM32 Digital Camera Memory Interface Pixel Processor + * + * Copyright (C) STMicroelectronics SA 2023 + * Authors: Hugues Fruchet <hugues.fruchet@foss.st.com> + * Alain Volmat <alain.volmat@foss.st.com> + * for STMicroelectronics. + */ + +#include <linux/v4l2-mediabus.h> +#include <media/v4l2-event.h> +#include <media/v4l2-subdev.h> + +#include "dcmipp-common.h" + +#define DCMIPP_PRCR 0x104 +#define DCMIPP_PRCR_FORMAT_SHIFT 16 +#define DCMIPP_PRCR_FORMAT_YUV422 0x1e +#define DCMIPP_PRCR_FORMAT_RGB565 0x22 +#define DCMIPP_PRCR_FORMAT_RAW8 0x2a +#define DCMIPP_PRCR_FORMAT_G8 0x4a +#define DCMIPP_PRCR_FORMAT_BYTE_STREAM 0x5a +#define DCMIPP_PRCR_ESS BIT(4) +#define DCMIPP_PRCR_PCKPOL BIT(5) +#define DCMIPP_PRCR_HSPOL BIT(6) +#define DCMIPP_PRCR_VSPOL BIT(7) +#define DCMIPP_PRCR_ENABLE BIT(14) +#define DCMIPP_PRCR_SWAPCYCLES BIT(25) + +#define DCMIPP_PRESCR 0x108 +#define DCMIPP_PRESUR 0x10c + +#define IS_SINK(pad) (!(pad)) +#define IS_SRC(pad) ((pad)) + +struct dcmipp_par_pix_map { + unsigned int code_sink; + unsigned int code_src; + u8 prcr_format; + u8 prcr_swapcycles; +}; + +#define PIXMAP_SINK_SRC_PRCR_SWAP(sink, src, prcr, swap) \ + { \ + .code_sink = MEDIA_BUS_FMT_##sink, \ + .code_src = MEDIA_BUS_FMT_##src, \ + .prcr_format = DCMIPP_PRCR_FORMAT_##prcr, \ + .prcr_swapcycles = swap, \ + } +static const struct dcmipp_par_pix_map dcmipp_par_pix_map_list[] = { + /* RGB565 */ + PIXMAP_SINK_SRC_PRCR_SWAP(RGB565_2X8_LE, RGB565_2X8_LE, RGB565, 1), + PIXMAP_SINK_SRC_PRCR_SWAP(RGB565_2X8_BE, RGB565_2X8_LE, RGB565, 0), + /* YUV422 */ + PIXMAP_SINK_SRC_PRCR_SWAP(YUYV8_2X8, YUYV8_2X8, YUV422, 1), + PIXMAP_SINK_SRC_PRCR_SWAP(YUYV8_2X8, UYVY8_2X8, YUV422, 0), + PIXMAP_SINK_SRC_PRCR_SWAP(UYVY8_2X8, UYVY8_2X8, YUV422, 1), + PIXMAP_SINK_SRC_PRCR_SWAP(UYVY8_2X8, YUYV8_2X8, YUV422, 0), + PIXMAP_SINK_SRC_PRCR_SWAP(YVYU8_2X8, YVYU8_2X8, YUV422, 1), + PIXMAP_SINK_SRC_PRCR_SWAP(VYUY8_2X8, VYUY8_2X8, YUV422, 1), + /* GREY */ + PIXMAP_SINK_SRC_PRCR_SWAP(Y8_1X8, Y8_1X8, G8, 0), + /* Raw Bayer */ + PIXMAP_SINK_SRC_PRCR_SWAP(SBGGR8_1X8, SBGGR8_1X8, RAW8, 0), + PIXMAP_SINK_SRC_PRCR_SWAP(SGBRG8_1X8, SGBRG8_1X8, RAW8, 0), + PIXMAP_SINK_SRC_PRCR_SWAP(SGRBG8_1X8, SGRBG8_1X8, RAW8, 0), + PIXMAP_SINK_SRC_PRCR_SWAP(SRGGB8_1X8, SRGGB8_1X8, RAW8, 0), + /* JPEG */ + PIXMAP_SINK_SRC_PRCR_SWAP(JPEG_1X8, JPEG_1X8, BYTE_STREAM, 0), +}; + +/* + * Search through the pix_map table, skipping two consecutive entry with the + * same code + */ +static inline const struct dcmipp_par_pix_map *dcmipp_par_pix_map_by_index + (unsigned int index, + unsigned int pad) +{ + unsigned int i = 0; + u32 prev_code = 0, cur_code; + + while (i < ARRAY_SIZE(dcmipp_par_pix_map_list)) { + if (IS_SRC(pad)) + cur_code = dcmipp_par_pix_map_list[i].code_src; + else + cur_code = dcmipp_par_pix_map_list[i].code_sink; + + if (cur_code == prev_code) { + i++; + continue; + } + prev_code = cur_code; + + if (index == 0) + break; + i++; + index--; + } + + if (i >= ARRAY_SIZE(dcmipp_par_pix_map_list)) + return NULL; + + return &dcmipp_par_pix_map_list[i]; +} + +static inline const struct dcmipp_par_pix_map *dcmipp_par_pix_map_by_code + (u32 code_sink, u32 code_src) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(dcmipp_par_pix_map_list); i++) { + if ((dcmipp_par_pix_map_list[i].code_sink == code_sink && + dcmipp_par_pix_map_list[i].code_src == code_src) || + (dcmipp_par_pix_map_list[i].code_sink == code_src && + dcmipp_par_pix_map_list[i].code_src == code_sink) || + (dcmipp_par_pix_map_list[i].code_sink == code_sink && + code_src == 0) || + (code_sink == 0 && + dcmipp_par_pix_map_list[i].code_src == code_src)) + return &dcmipp_par_pix_map_list[i]; + } + return NULL; +} + +struct dcmipp_par_device { + struct dcmipp_ent_device ved; + struct v4l2_subdev sd; + struct device *dev; + void __iomem *regs; + bool streaming; +}; + +static const struct v4l2_mbus_framefmt fmt_default = { + .width = DCMIPP_FMT_WIDTH_DEFAULT, + .height = DCMIPP_FMT_HEIGHT_DEFAULT, + .code = MEDIA_BUS_FMT_RGB565_2X8_LE, + .field = V4L2_FIELD_NONE, + .colorspace = DCMIPP_COLORSPACE_DEFAULT, + .ycbcr_enc = DCMIPP_YCBCR_ENC_DEFAULT, + .quantization = DCMIPP_QUANTIZATION_DEFAULT, + .xfer_func = DCMIPP_XFER_FUNC_DEFAULT, +}; + +static int dcmipp_par_init_state(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state) +{ + unsigned int i; + + for (i = 0; i < sd->entity.num_pads; i++) { + struct v4l2_mbus_framefmt *mf; + + mf = v4l2_subdev_state_get_format(sd_state, i); + *mf = fmt_default; + } + + return 0; +} + +static int dcmipp_par_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_mbus_code_enum *code) +{ + const struct dcmipp_par_pix_map *vpix = + dcmipp_par_pix_map_by_index(code->index, code->pad); + + if (!vpix) + return -EINVAL; + + code->code = IS_SRC(code->pad) ? vpix->code_src : vpix->code_sink; + + return 0; +} + +static int dcmipp_par_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_frame_size_enum *fse) +{ + const struct dcmipp_par_pix_map *vpix; + + if (fse->index) + return -EINVAL; + + /* Only accept code in the pix map table */ + vpix = dcmipp_par_pix_map_by_code(IS_SINK(fse->pad) ? fse->code : 0, + IS_SRC(fse->pad) ? fse->code : 0); + if (!vpix) + return -EINVAL; + + fse->min_width = DCMIPP_FRAME_MIN_WIDTH; + fse->max_width = DCMIPP_FRAME_MAX_WIDTH; + fse->min_height = DCMIPP_FRAME_MIN_HEIGHT; + fse->max_height = DCMIPP_FRAME_MAX_HEIGHT; + + return 0; +} + +static void dcmipp_par_adjust_fmt(struct dcmipp_par_device *par, + struct v4l2_mbus_framefmt *fmt, __u32 pad) +{ + const struct dcmipp_par_pix_map *vpix; + + /* Only accept code in the pix map table */ + vpix = dcmipp_par_pix_map_by_code(IS_SINK(pad) ? fmt->code : 0, + IS_SRC(pad) ? fmt->code : 0); + if (!vpix) + fmt->code = fmt_default.code; + + /* Exclude JPEG if BT656 bus is selected */ + if (vpix && vpix->code_sink == MEDIA_BUS_FMT_JPEG_1X8 && + par->ved.bus_type == V4L2_MBUS_BT656) + fmt->code = fmt_default.code; + + fmt->width = clamp_t(u32, fmt->width, DCMIPP_FRAME_MIN_WIDTH, + DCMIPP_FRAME_MAX_WIDTH) & ~1; + fmt->height = clamp_t(u32, fmt->height, DCMIPP_FRAME_MIN_HEIGHT, + DCMIPP_FRAME_MAX_HEIGHT) & ~1; + + if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE) + fmt->field = fmt_default.field; + + dcmipp_colorimetry_clamp(fmt); +} + +static int dcmipp_par_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *fmt) +{ + struct dcmipp_par_device *par = v4l2_get_subdevdata(sd); + struct v4l2_mbus_framefmt *mf; + + if (par->streaming) + return -EBUSY; + + mf = v4l2_subdev_state_get_format(sd_state, fmt->pad); + + /* Set the new format */ + dcmipp_par_adjust_fmt(par, &fmt->format, fmt->pad); + + dev_dbg(par->dev, "%s: format update: old:%dx%d (0x%x, %d, %d, %d, %d) new:%dx%d (0x%x, %d, %d, %d, %d)\n", + par->sd.name, + /* old */ + mf->width, mf->height, mf->code, + mf->colorspace, mf->quantization, + mf->xfer_func, mf->ycbcr_enc, + /* new */ + fmt->format.width, fmt->format.height, fmt->format.code, + fmt->format.colorspace, fmt->format.quantization, + fmt->format.xfer_func, fmt->format.ycbcr_enc); + + *mf = fmt->format; + + /* When setting the sink format, report that format on the src pad */ + if (IS_SINK(fmt->pad)) { + mf = v4l2_subdev_state_get_format(sd_state, 1); + *mf = fmt->format; + dcmipp_par_adjust_fmt(par, mf, 1); + } + + return 0; +} + +static const struct v4l2_subdev_pad_ops dcmipp_par_pad_ops = { + .enum_mbus_code = dcmipp_par_enum_mbus_code, + .enum_frame_size = dcmipp_par_enum_frame_size, + .get_fmt = v4l2_subdev_get_fmt, + .set_fmt = dcmipp_par_set_fmt, +}; + +static int dcmipp_par_configure(struct dcmipp_par_device *par) +{ + u32 val = 0; + const struct dcmipp_par_pix_map *vpix; + struct v4l2_subdev_state *state; + struct v4l2_mbus_framefmt *sink_fmt; + struct v4l2_mbus_framefmt *src_fmt; + + /* Set vertical synchronization polarity */ + if (par->ved.bus.flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) + val |= DCMIPP_PRCR_VSPOL; + + /* Set horizontal synchronization polarity */ + if (par->ved.bus.flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) + val |= DCMIPP_PRCR_HSPOL; + + /* Set pixel clock polarity */ + if (par->ved.bus.flags & V4L2_MBUS_PCLK_SAMPLE_RISING) + val |= DCMIPP_PRCR_PCKPOL; + + /* + * BT656 embedded synchronisation bus mode. + * + * Default SAV/EAV mode is supported here with default codes + * SAV=0xff000080 & EAV=0xff00009d. + * With DCMIPP this means LSC=SAV=0x80 & LEC=EAV=0x9d. + */ + if (par->ved.bus_type == V4L2_MBUS_BT656) { + val |= DCMIPP_PRCR_ESS; + + /* Unmask all codes */ + reg_write(par, DCMIPP_PRESUR, 0xffffffff);/* FEC:LEC:LSC:FSC */ + + /* Trig on LSC=0x80 & LEC=0x9d codes, ignore FSC and FEC */ + reg_write(par, DCMIPP_PRESCR, 0xff9d80ff);/* FEC:LEC:LSC:FSC */ + } + + /* Set format */ + state = v4l2_subdev_lock_and_get_active_state(&par->sd); + sink_fmt = v4l2_subdev_state_get_format(state, 0); + src_fmt = v4l2_subdev_state_get_format(state, 1); + v4l2_subdev_unlock_state(state); + + vpix = dcmipp_par_pix_map_by_code(sink_fmt->code, src_fmt->code); + if (!vpix) { + dev_err(par->dev, "Invalid sink/src format configuration\n"); + return -EINVAL; + } + + val |= vpix->prcr_format << DCMIPP_PRCR_FORMAT_SHIFT; + + /* swap cycles */ + if (vpix->prcr_swapcycles) + val |= DCMIPP_PRCR_SWAPCYCLES; + + reg_write(par, DCMIPP_PRCR, val); + + return 0; +} + +static int dcmipp_par_s_stream(struct v4l2_subdev *sd, int enable) +{ + struct dcmipp_par_device *par = + container_of(sd, struct dcmipp_par_device, sd); + struct v4l2_subdev *s_subdev; + struct media_pad *pad; + int ret = 0; + + /* Get source subdev */ + pad = media_pad_remote_pad_first(&sd->entity.pads[0]); + if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) + return -EINVAL; + s_subdev = media_entity_to_v4l2_subdev(pad->entity); + + if (enable) { + ret = dcmipp_par_configure(par); + if (ret) + return ret; + + /* Enable parallel interface */ + reg_set(par, DCMIPP_PRCR, DCMIPP_PRCR_ENABLE); + + ret = v4l2_subdev_call(s_subdev, video, s_stream, enable); + if (ret < 0) { + dev_err(par->dev, + "failed to start source subdev streaming (%d)\n", + ret); + return ret; + } + } else { + ret = v4l2_subdev_call(s_subdev, video, s_stream, enable); + if (ret < 0) { + dev_err(par->dev, + "failed to stop source subdev streaming (%d)\n", + ret); + return ret; + } + + /* Disable parallel interface */ + reg_clear(par, DCMIPP_PRCR, DCMIPP_PRCR_ENABLE); + } + + par->streaming = enable; + + return ret; +} + +static const struct v4l2_subdev_video_ops dcmipp_par_video_ops = { + .s_stream = dcmipp_par_s_stream, +}; + +static const struct v4l2_subdev_ops dcmipp_par_ops = { + .pad = &dcmipp_par_pad_ops, + .video = &dcmipp_par_video_ops, +}; + +static void dcmipp_par_release(struct v4l2_subdev *sd) +{ + struct dcmipp_par_device *par = + container_of(sd, struct dcmipp_par_device, sd); + + kfree(par); +} + +static const struct v4l2_subdev_internal_ops dcmipp_par_int_ops = { + .init_state = dcmipp_par_init_state, + .release = dcmipp_par_release, +}; + +void dcmipp_par_ent_release(struct dcmipp_ent_device *ved) +{ + struct dcmipp_par_device *par = + container_of(ved, struct dcmipp_par_device, ved); + + dcmipp_ent_sd_unregister(ved, &par->sd); +} + +struct dcmipp_ent_device *dcmipp_par_ent_init(struct device *dev, + const char *entity_name, + struct v4l2_device *v4l2_dev, + void __iomem *regs) +{ + struct dcmipp_par_device *par; + const unsigned long pads_flag[] = { + MEDIA_PAD_FL_SINK, MEDIA_PAD_FL_SOURCE, + }; + int ret; + + /* Allocate the par struct */ + par = kzalloc(sizeof(*par), GFP_KERNEL); + if (!par) + return ERR_PTR(-ENOMEM); + + par->regs = regs; + + /* Initialize ved and sd */ + ret = dcmipp_ent_sd_register(&par->ved, &par->sd, v4l2_dev, + entity_name, MEDIA_ENT_F_VID_IF_BRIDGE, + ARRAY_SIZE(pads_flag), pads_flag, + &dcmipp_par_int_ops, &dcmipp_par_ops, + NULL, NULL); + if (ret) { + kfree(par); + return ERR_PTR(ret); + } + + par->dev = dev; + + return &par->ved; +} |