869 lines
22 KiB
C
869 lines
22 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2021-2022 Bootlin
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* Author: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
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*/
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-fwnode.h>
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#include "sun6i_csi.h"
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#include "sun6i_csi_bridge.h"
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#include "sun6i_csi_reg.h"
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/* Helpers */
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void sun6i_csi_bridge_dimensions(struct sun6i_csi_device *csi_dev,
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unsigned int *width, unsigned int *height)
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{
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if (width)
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*width = csi_dev->bridge.mbus_format.width;
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if (height)
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*height = csi_dev->bridge.mbus_format.height;
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}
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void sun6i_csi_bridge_format(struct sun6i_csi_device *csi_dev,
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u32 *mbus_code, u32 *field)
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{
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if (mbus_code)
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*mbus_code = csi_dev->bridge.mbus_format.code;
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if (field)
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*field = csi_dev->bridge.mbus_format.field;
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}
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/* Format */
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static const struct sun6i_csi_bridge_format sun6i_csi_bridge_formats[] = {
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/* Bayer */
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{
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.mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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/* RGB */
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{
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.mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_RGB565_2X8_BE,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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/* YUV422 */
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{
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.mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
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.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
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.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
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.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
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.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
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.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
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.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
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.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
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.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
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.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
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.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
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.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
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.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
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.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
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.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
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.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_YUYV8_1X16,
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.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
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.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
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.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_UYVY8_1X16,
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.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
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.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
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.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_YVYU8_1X16,
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.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
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.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
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.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_UYVY8_1X16,
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.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
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.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
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.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
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},
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{
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.mbus_code = MEDIA_BUS_FMT_VYUY8_1X16,
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.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
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.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
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.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
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},
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/* Compressed */
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{
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.mbus_code = MEDIA_BUS_FMT_JPEG_1X8,
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.input_format = SUN6I_CSI_INPUT_FMT_RAW,
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},
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};
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const struct sun6i_csi_bridge_format *
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sun6i_csi_bridge_format_find(u32 mbus_code)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(sun6i_csi_bridge_formats); i++)
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if (sun6i_csi_bridge_formats[i].mbus_code == mbus_code)
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return &sun6i_csi_bridge_formats[i];
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return NULL;
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}
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/* Bridge */
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static void sun6i_csi_bridge_irq_enable(struct sun6i_csi_device *csi_dev)
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{
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struct regmap *regmap = csi_dev->regmap;
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regmap_write(regmap, SUN6I_CSI_CH_INT_EN_REG,
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SUN6I_CSI_CH_INT_EN_VS |
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SUN6I_CSI_CH_INT_EN_HB_OF |
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SUN6I_CSI_CH_INT_EN_FIFO2_OF |
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SUN6I_CSI_CH_INT_EN_FIFO1_OF |
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SUN6I_CSI_CH_INT_EN_FIFO0_OF |
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SUN6I_CSI_CH_INT_EN_FD |
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SUN6I_CSI_CH_INT_EN_CD);
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}
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static void sun6i_csi_bridge_irq_disable(struct sun6i_csi_device *csi_dev)
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{
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struct regmap *regmap = csi_dev->regmap;
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regmap_write(regmap, SUN6I_CSI_CH_INT_EN_REG, 0);
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}
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static void sun6i_csi_bridge_irq_clear(struct sun6i_csi_device *csi_dev)
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{
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struct regmap *regmap = csi_dev->regmap;
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regmap_write(regmap, SUN6I_CSI_CH_INT_EN_REG, 0);
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regmap_write(regmap, SUN6I_CSI_CH_INT_STA_REG,
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SUN6I_CSI_CH_INT_STA_CLEAR);
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}
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static void sun6i_csi_bridge_enable(struct sun6i_csi_device *csi_dev)
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{
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struct regmap *regmap = csi_dev->regmap;
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regmap_update_bits(regmap, SUN6I_CSI_EN_REG, SUN6I_CSI_EN_CSI_EN,
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SUN6I_CSI_EN_CSI_EN);
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regmap_update_bits(regmap, SUN6I_CSI_CAP_REG, SUN6I_CSI_CAP_VCAP_ON,
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SUN6I_CSI_CAP_VCAP_ON);
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}
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static void sun6i_csi_bridge_disable(struct sun6i_csi_device *csi_dev)
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{
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struct regmap *regmap = csi_dev->regmap;
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regmap_update_bits(regmap, SUN6I_CSI_CAP_REG, SUN6I_CSI_CAP_VCAP_ON, 0);
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regmap_update_bits(regmap, SUN6I_CSI_EN_REG, SUN6I_CSI_EN_CSI_EN, 0);
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}
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static void
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sun6i_csi_bridge_configure_parallel(struct sun6i_csi_device *csi_dev)
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{
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struct device *dev = csi_dev->dev;
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struct regmap *regmap = csi_dev->regmap;
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struct v4l2_fwnode_endpoint *endpoint =
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&csi_dev->bridge.source_parallel.endpoint;
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unsigned char bus_width = endpoint->bus.parallel.bus_width;
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unsigned int flags = endpoint->bus.parallel.flags;
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u32 field;
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u32 value = SUN6I_CSI_IF_CFG_IF_CSI;
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sun6i_csi_bridge_format(csi_dev, NULL, &field);
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if (field == V4L2_FIELD_INTERLACED ||
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field == V4L2_FIELD_INTERLACED_TB ||
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field == V4L2_FIELD_INTERLACED_BT)
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value |= SUN6I_CSI_IF_CFG_SRC_TYPE_INTERLACED |
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SUN6I_CSI_IF_CFG_FIELD_DT_PCLK_SHIFT(1) |
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SUN6I_CSI_IF_CFG_FIELD_DT_FIELD_VSYNC;
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else
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value |= SUN6I_CSI_IF_CFG_SRC_TYPE_PROGRESSIVE;
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switch (endpoint->bus_type) {
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case V4L2_MBUS_PARALLEL:
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if (bus_width == 16)
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value |= SUN6I_CSI_IF_CFG_IF_CSI_YUV_COMBINED;
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else
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value |= SUN6I_CSI_IF_CFG_IF_CSI_YUV_RAW;
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if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
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value |= SUN6I_CSI_IF_CFG_FIELD_NEGATIVE;
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else
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value |= SUN6I_CSI_IF_CFG_FIELD_POSITIVE;
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if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
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value |= SUN6I_CSI_IF_CFG_VREF_POL_NEGATIVE;
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else
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value |= SUN6I_CSI_IF_CFG_VREF_POL_POSITIVE;
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if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
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value |= SUN6I_CSI_IF_CFG_HREF_POL_NEGATIVE;
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else
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value |= SUN6I_CSI_IF_CFG_HREF_POL_POSITIVE;
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if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
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value |= SUN6I_CSI_IF_CFG_CLK_POL_RISING;
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else
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value |= SUN6I_CSI_IF_CFG_CLK_POL_FALLING;
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break;
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case V4L2_MBUS_BT656:
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if (bus_width == 16)
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value |= SUN6I_CSI_IF_CFG_IF_CSI_BT1120;
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else
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value |= SUN6I_CSI_IF_CFG_IF_CSI_BT656;
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if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
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value |= SUN6I_CSI_IF_CFG_FIELD_NEGATIVE;
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else
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value |= SUN6I_CSI_IF_CFG_FIELD_POSITIVE;
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if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
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value |= SUN6I_CSI_IF_CFG_CLK_POL_RISING;
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else
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value |= SUN6I_CSI_IF_CFG_CLK_POL_FALLING;
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break;
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default:
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dev_warn(dev, "unsupported bus type: %d\n", endpoint->bus_type);
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break;
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}
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switch (bus_width) {
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case 8:
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/* 16-bit YUV formats use a doubled width in 8-bit mode. */
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case 16:
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value |= SUN6I_CSI_IF_CFG_DATA_WIDTH_8;
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break;
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case 10:
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value |= SUN6I_CSI_IF_CFG_DATA_WIDTH_10;
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break;
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case 12:
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value |= SUN6I_CSI_IF_CFG_DATA_WIDTH_12;
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break;
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default:
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dev_warn(dev, "unsupported bus width: %u\n", bus_width);
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break;
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}
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regmap_write(regmap, SUN6I_CSI_IF_CFG_REG, value);
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}
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static void
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sun6i_csi_bridge_configure_mipi_csi2(struct sun6i_csi_device *csi_dev)
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{
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struct regmap *regmap = csi_dev->regmap;
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u32 value = SUN6I_CSI_IF_CFG_IF_MIPI;
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u32 field;
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sun6i_csi_bridge_format(csi_dev, NULL, &field);
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if (field == V4L2_FIELD_INTERLACED ||
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field == V4L2_FIELD_INTERLACED_TB ||
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field == V4L2_FIELD_INTERLACED_BT)
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value |= SUN6I_CSI_IF_CFG_SRC_TYPE_INTERLACED;
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else
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value |= SUN6I_CSI_IF_CFG_SRC_TYPE_PROGRESSIVE;
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regmap_write(regmap, SUN6I_CSI_IF_CFG_REG, value);
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}
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static void sun6i_csi_bridge_configure_format(struct sun6i_csi_device *csi_dev)
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{
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struct regmap *regmap = csi_dev->regmap;
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bool capture_streaming = csi_dev->capture.state.streaming;
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const struct sun6i_csi_bridge_format *bridge_format;
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const struct sun6i_csi_capture_format *capture_format;
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u32 mbus_code, field, pixelformat;
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u8 input_format, input_yuv_seq, output_format;
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u32 value = 0;
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sun6i_csi_bridge_format(csi_dev, &mbus_code, &field);
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bridge_format = sun6i_csi_bridge_format_find(mbus_code);
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if (WARN_ON(!bridge_format))
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return;
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input_format = bridge_format->input_format;
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input_yuv_seq = bridge_format->input_yuv_seq;
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if (capture_streaming) {
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sun6i_csi_capture_format(csi_dev, &pixelformat, NULL);
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capture_format = sun6i_csi_capture_format_find(pixelformat);
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if (WARN_ON(!capture_format))
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return;
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if (capture_format->input_format_raw)
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input_format = SUN6I_CSI_INPUT_FMT_RAW;
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if (capture_format->input_yuv_seq_invert)
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input_yuv_seq = bridge_format->input_yuv_seq_invert;
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if (field == V4L2_FIELD_INTERLACED ||
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field == V4L2_FIELD_INTERLACED_TB ||
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field == V4L2_FIELD_INTERLACED_BT)
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output_format = capture_format->output_format_field;
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else
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output_format = capture_format->output_format_frame;
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value |= SUN6I_CSI_CH_CFG_OUTPUT_FMT(output_format);
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}
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value |= SUN6I_CSI_CH_CFG_INPUT_FMT(input_format);
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value |= SUN6I_CSI_CH_CFG_INPUT_YUV_SEQ(input_yuv_seq);
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if (field == V4L2_FIELD_TOP)
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value |= SUN6I_CSI_CH_CFG_FIELD_SEL_FIELD0;
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else if (field == V4L2_FIELD_BOTTOM)
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value |= SUN6I_CSI_CH_CFG_FIELD_SEL_FIELD1;
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else
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value |= SUN6I_CSI_CH_CFG_FIELD_SEL_EITHER;
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regmap_write(regmap, SUN6I_CSI_CH_CFG_REG, value);
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}
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static void sun6i_csi_bridge_configure(struct sun6i_csi_device *csi_dev,
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struct sun6i_csi_bridge_source *source)
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{
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struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
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if (source == &bridge->source_parallel)
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sun6i_csi_bridge_configure_parallel(csi_dev);
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else
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sun6i_csi_bridge_configure_mipi_csi2(csi_dev);
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sun6i_csi_bridge_configure_format(csi_dev);
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}
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/* V4L2 Subdev */
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static int sun6i_csi_bridge_s_stream(struct v4l2_subdev *subdev, int on)
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{
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struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
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struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
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struct media_pad *local_pad = &bridge->pads[SUN6I_CSI_BRIDGE_PAD_SINK];
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bool capture_streaming = csi_dev->capture.state.streaming;
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struct device *dev = csi_dev->dev;
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struct sun6i_csi_bridge_source *source;
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struct v4l2_subdev *source_subdev;
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struct media_pad *remote_pad;
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int ret;
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/* Source */
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remote_pad = media_pad_remote_pad_unique(local_pad);
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if (IS_ERR(remote_pad)) {
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|
dev_err(dev,
|
|
"zero or more than a single source connected to the bridge\n");
|
|
return PTR_ERR(remote_pad);
|
|
}
|
|
|
|
source_subdev = media_entity_to_v4l2_subdev(remote_pad->entity);
|
|
|
|
if (source_subdev == bridge->source_parallel.subdev)
|
|
source = &bridge->source_parallel;
|
|
else
|
|
source = &bridge->source_mipi_csi2;
|
|
|
|
if (!on) {
|
|
v4l2_subdev_call(source_subdev, video, s_stream, 0);
|
|
ret = 0;
|
|
goto disable;
|
|
}
|
|
|
|
/* PM */
|
|
|
|
ret = pm_runtime_resume_and_get(dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Clear */
|
|
|
|
sun6i_csi_bridge_irq_clear(csi_dev);
|
|
|
|
/* Configure */
|
|
|
|
sun6i_csi_bridge_configure(csi_dev, source);
|
|
|
|
if (capture_streaming)
|
|
sun6i_csi_capture_configure(csi_dev);
|
|
|
|
/* State Update */
|
|
|
|
if (capture_streaming)
|
|
sun6i_csi_capture_state_update(csi_dev);
|
|
|
|
/* Enable */
|
|
|
|
if (capture_streaming)
|
|
sun6i_csi_bridge_irq_enable(csi_dev);
|
|
|
|
sun6i_csi_bridge_enable(csi_dev);
|
|
|
|
ret = v4l2_subdev_call(source_subdev, video, s_stream, 1);
|
|
if (ret && ret != -ENOIOCTLCMD)
|
|
goto disable;
|
|
|
|
return 0;
|
|
|
|
disable:
|
|
if (capture_streaming)
|
|
sun6i_csi_bridge_irq_disable(csi_dev);
|
|
|
|
sun6i_csi_bridge_disable(csi_dev);
|
|
|
|
pm_runtime_put(dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct v4l2_subdev_video_ops sun6i_csi_bridge_video_ops = {
|
|
.s_stream = sun6i_csi_bridge_s_stream,
|
|
};
|
|
|
|
static void
|
|
sun6i_csi_bridge_mbus_format_prepare(struct v4l2_mbus_framefmt *mbus_format)
|
|
{
|
|
if (!sun6i_csi_bridge_format_find(mbus_format->code))
|
|
mbus_format->code = sun6i_csi_bridge_formats[0].mbus_code;
|
|
|
|
mbus_format->field = V4L2_FIELD_NONE;
|
|
mbus_format->colorspace = V4L2_COLORSPACE_RAW;
|
|
mbus_format->quantization = V4L2_QUANTIZATION_DEFAULT;
|
|
mbus_format->xfer_func = V4L2_XFER_FUNC_DEFAULT;
|
|
}
|
|
|
|
static int sun6i_csi_bridge_init_cfg(struct v4l2_subdev *subdev,
|
|
struct v4l2_subdev_state *state)
|
|
{
|
|
struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
|
|
unsigned int pad = SUN6I_CSI_BRIDGE_PAD_SINK;
|
|
struct v4l2_mbus_framefmt *mbus_format =
|
|
v4l2_subdev_get_try_format(subdev, state, pad);
|
|
struct mutex *lock = &csi_dev->bridge.lock;
|
|
|
|
mutex_lock(lock);
|
|
|
|
mbus_format->code = sun6i_csi_bridge_formats[0].mbus_code;
|
|
mbus_format->width = 1280;
|
|
mbus_format->height = 720;
|
|
|
|
sun6i_csi_bridge_mbus_format_prepare(mbus_format);
|
|
|
|
mutex_unlock(lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
sun6i_csi_bridge_enum_mbus_code(struct v4l2_subdev *subdev,
|
|
struct v4l2_subdev_state *state,
|
|
struct v4l2_subdev_mbus_code_enum *code_enum)
|
|
{
|
|
if (code_enum->index >= ARRAY_SIZE(sun6i_csi_bridge_formats))
|
|
return -EINVAL;
|
|
|
|
code_enum->code = sun6i_csi_bridge_formats[code_enum->index].mbus_code;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sun6i_csi_bridge_get_fmt(struct v4l2_subdev *subdev,
|
|
struct v4l2_subdev_state *state,
|
|
struct v4l2_subdev_format *format)
|
|
{
|
|
struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
|
|
struct v4l2_mbus_framefmt *mbus_format = &format->format;
|
|
struct mutex *lock = &csi_dev->bridge.lock;
|
|
|
|
mutex_lock(lock);
|
|
|
|
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
|
|
*mbus_format = *v4l2_subdev_get_try_format(subdev, state,
|
|
format->pad);
|
|
else
|
|
*mbus_format = csi_dev->bridge.mbus_format;
|
|
|
|
mutex_unlock(lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sun6i_csi_bridge_set_fmt(struct v4l2_subdev *subdev,
|
|
struct v4l2_subdev_state *state,
|
|
struct v4l2_subdev_format *format)
|
|
{
|
|
struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
|
|
struct v4l2_mbus_framefmt *mbus_format = &format->format;
|
|
struct mutex *lock = &csi_dev->bridge.lock;
|
|
|
|
mutex_lock(lock);
|
|
|
|
sun6i_csi_bridge_mbus_format_prepare(mbus_format);
|
|
|
|
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
|
|
*v4l2_subdev_get_try_format(subdev, state, format->pad) =
|
|
*mbus_format;
|
|
else
|
|
csi_dev->bridge.mbus_format = *mbus_format;
|
|
|
|
mutex_unlock(lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct v4l2_subdev_pad_ops sun6i_csi_bridge_pad_ops = {
|
|
.init_cfg = sun6i_csi_bridge_init_cfg,
|
|
.enum_mbus_code = sun6i_csi_bridge_enum_mbus_code,
|
|
.get_fmt = sun6i_csi_bridge_get_fmt,
|
|
.set_fmt = sun6i_csi_bridge_set_fmt,
|
|
};
|
|
|
|
static const struct v4l2_subdev_ops sun6i_csi_bridge_subdev_ops = {
|
|
.video = &sun6i_csi_bridge_video_ops,
|
|
.pad = &sun6i_csi_bridge_pad_ops,
|
|
};
|
|
|
|
/* Media Entity */
|
|
|
|
static const struct media_entity_operations sun6i_csi_bridge_entity_ops = {
|
|
.link_validate = v4l2_subdev_link_validate,
|
|
};
|
|
|
|
/* V4L2 Async */
|
|
|
|
static int sun6i_csi_bridge_link(struct sun6i_csi_device *csi_dev,
|
|
int sink_pad_index,
|
|
struct v4l2_subdev *remote_subdev,
|
|
bool enabled)
|
|
{
|
|
struct device *dev = csi_dev->dev;
|
|
struct v4l2_subdev *subdev = &csi_dev->bridge.subdev;
|
|
struct media_entity *sink_entity = &subdev->entity;
|
|
struct media_entity *source_entity = &remote_subdev->entity;
|
|
int source_pad_index;
|
|
int ret;
|
|
|
|
/* Get the first remote source pad. */
|
|
ret = media_entity_get_fwnode_pad(source_entity, remote_subdev->fwnode,
|
|
MEDIA_PAD_FL_SOURCE);
|
|
if (ret < 0) {
|
|
dev_err(dev, "missing source pad in external entity %s\n",
|
|
source_entity->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
source_pad_index = ret;
|
|
|
|
dev_dbg(dev, "creating %s:%u -> %s:%u link\n", source_entity->name,
|
|
source_pad_index, sink_entity->name, sink_pad_index);
|
|
|
|
ret = media_create_pad_link(source_entity, source_pad_index,
|
|
sink_entity, sink_pad_index,
|
|
enabled ? MEDIA_LNK_FL_ENABLED : 0);
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to create %s:%u -> %s:%u link\n",
|
|
source_entity->name, source_pad_index,
|
|
sink_entity->name, sink_pad_index);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
sun6i_csi_bridge_notifier_bound(struct v4l2_async_notifier *notifier,
|
|
struct v4l2_subdev *remote_subdev,
|
|
struct v4l2_async_subdev *async_subdev)
|
|
{
|
|
struct sun6i_csi_device *csi_dev =
|
|
container_of(notifier, struct sun6i_csi_device,
|
|
bridge.notifier);
|
|
struct sun6i_csi_bridge_async_subdev *bridge_async_subdev =
|
|
container_of(async_subdev, struct sun6i_csi_bridge_async_subdev,
|
|
async_subdev);
|
|
struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
|
|
struct sun6i_csi_bridge_source *source = bridge_async_subdev->source;
|
|
bool enabled = false;
|
|
int ret;
|
|
|
|
switch (source->endpoint.base.port) {
|
|
case SUN6I_CSI_PORT_PARALLEL:
|
|
enabled = true;
|
|
break;
|
|
case SUN6I_CSI_PORT_MIPI_CSI2:
|
|
enabled = !bridge->source_parallel.expected;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
source->subdev = remote_subdev;
|
|
|
|
if (csi_dev->isp_available) {
|
|
/*
|
|
* Hook to the first available remote subdev to get v4l2 and
|
|
* media devices and register the capture device then.
|
|
*/
|
|
ret = sun6i_csi_isp_complete(csi_dev, remote_subdev->v4l2_dev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return sun6i_csi_bridge_link(csi_dev, SUN6I_CSI_BRIDGE_PAD_SINK,
|
|
remote_subdev, enabled);
|
|
}
|
|
|
|
static int
|
|
sun6i_csi_bridge_notifier_complete(struct v4l2_async_notifier *notifier)
|
|
{
|
|
struct sun6i_csi_device *csi_dev =
|
|
container_of(notifier, struct sun6i_csi_device,
|
|
bridge.notifier);
|
|
struct v4l2_device *v4l2_dev = &csi_dev->v4l2.v4l2_dev;
|
|
|
|
if (csi_dev->isp_available)
|
|
return 0;
|
|
|
|
return v4l2_device_register_subdev_nodes(v4l2_dev);
|
|
}
|
|
|
|
static const struct v4l2_async_notifier_operations
|
|
sun6i_csi_bridge_notifier_ops = {
|
|
.bound = sun6i_csi_bridge_notifier_bound,
|
|
.complete = sun6i_csi_bridge_notifier_complete,
|
|
};
|
|
|
|
/* Bridge */
|
|
|
|
static int sun6i_csi_bridge_source_setup(struct sun6i_csi_device *csi_dev,
|
|
struct sun6i_csi_bridge_source *source,
|
|
u32 port,
|
|
enum v4l2_mbus_type *bus_types)
|
|
{
|
|
struct device *dev = csi_dev->dev;
|
|
struct v4l2_async_notifier *notifier = &csi_dev->bridge.notifier;
|
|
struct v4l2_fwnode_endpoint *endpoint = &source->endpoint;
|
|
struct sun6i_csi_bridge_async_subdev *bridge_async_subdev;
|
|
struct fwnode_handle *handle;
|
|
int ret;
|
|
|
|
handle = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), port, 0, 0);
|
|
if (!handle)
|
|
return -ENODEV;
|
|
|
|
ret = v4l2_fwnode_endpoint_parse(handle, endpoint);
|
|
if (ret)
|
|
goto complete;
|
|
|
|
if (bus_types) {
|
|
bool valid = false;
|
|
unsigned int i;
|
|
|
|
for (i = 0; bus_types[i] != V4L2_MBUS_INVALID; i++) {
|
|
if (endpoint->bus_type == bus_types[i]) {
|
|
valid = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!valid) {
|
|
dev_err(dev, "unsupported bus type for port %d\n",
|
|
port);
|
|
ret = -EINVAL;
|
|
goto complete;
|
|
}
|
|
}
|
|
|
|
bridge_async_subdev =
|
|
v4l2_async_nf_add_fwnode_remote(notifier, handle,
|
|
struct
|
|
sun6i_csi_bridge_async_subdev);
|
|
if (IS_ERR(bridge_async_subdev)) {
|
|
ret = PTR_ERR(bridge_async_subdev);
|
|
goto complete;
|
|
}
|
|
|
|
bridge_async_subdev->source = source;
|
|
|
|
source->expected = true;
|
|
|
|
complete:
|
|
fwnode_handle_put(handle);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int sun6i_csi_bridge_setup(struct sun6i_csi_device *csi_dev)
|
|
{
|
|
struct device *dev = csi_dev->dev;
|
|
struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
|
|
struct v4l2_device *v4l2_dev = csi_dev->v4l2_dev;
|
|
struct v4l2_subdev *subdev = &bridge->subdev;
|
|
struct v4l2_async_notifier *notifier = &bridge->notifier;
|
|
struct media_pad *pads = bridge->pads;
|
|
enum v4l2_mbus_type parallel_mbus_types[] = {
|
|
V4L2_MBUS_PARALLEL,
|
|
V4L2_MBUS_BT656,
|
|
V4L2_MBUS_INVALID
|
|
};
|
|
int ret;
|
|
|
|
mutex_init(&bridge->lock);
|
|
|
|
/* V4L2 Subdev */
|
|
|
|
v4l2_subdev_init(subdev, &sun6i_csi_bridge_subdev_ops);
|
|
strscpy(subdev->name, SUN6I_CSI_BRIDGE_NAME, sizeof(subdev->name));
|
|
subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
|
subdev->owner = THIS_MODULE;
|
|
subdev->dev = dev;
|
|
|
|
v4l2_set_subdevdata(subdev, csi_dev);
|
|
|
|
/* Media Entity */
|
|
|
|
subdev->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
|
|
subdev->entity.ops = &sun6i_csi_bridge_entity_ops;
|
|
|
|
/* Media Pads */
|
|
|
|
pads[SUN6I_CSI_BRIDGE_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
|
|
pads[SUN6I_CSI_BRIDGE_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE |
|
|
MEDIA_PAD_FL_MUST_CONNECT;
|
|
|
|
ret = media_entity_pads_init(&subdev->entity,
|
|
SUN6I_CSI_BRIDGE_PAD_COUNT, pads);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* V4L2 Subdev */
|
|
|
|
if (csi_dev->isp_available)
|
|
ret = v4l2_async_register_subdev(subdev);
|
|
else
|
|
ret = v4l2_device_register_subdev(v4l2_dev, subdev);
|
|
|
|
if (ret) {
|
|
dev_err(dev, "failed to register v4l2 subdev: %d\n", ret);
|
|
goto error_media_entity;
|
|
}
|
|
|
|
/* V4L2 Async */
|
|
|
|
v4l2_async_nf_init(notifier);
|
|
notifier->ops = &sun6i_csi_bridge_notifier_ops;
|
|
|
|
sun6i_csi_bridge_source_setup(csi_dev, &bridge->source_parallel,
|
|
SUN6I_CSI_PORT_PARALLEL,
|
|
parallel_mbus_types);
|
|
sun6i_csi_bridge_source_setup(csi_dev, &bridge->source_mipi_csi2,
|
|
SUN6I_CSI_PORT_MIPI_CSI2, NULL);
|
|
|
|
if (csi_dev->isp_available)
|
|
ret = v4l2_async_subdev_nf_register(subdev, notifier);
|
|
else
|
|
ret = v4l2_async_nf_register(v4l2_dev, notifier);
|
|
if (ret) {
|
|
dev_err(dev, "failed to register v4l2 async notifier: %d\n",
|
|
ret);
|
|
goto error_v4l2_async_notifier;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error_v4l2_async_notifier:
|
|
v4l2_async_nf_cleanup(notifier);
|
|
|
|
if (csi_dev->isp_available)
|
|
v4l2_async_unregister_subdev(subdev);
|
|
else
|
|
v4l2_device_unregister_subdev(subdev);
|
|
|
|
error_media_entity:
|
|
media_entity_cleanup(&subdev->entity);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void sun6i_csi_bridge_cleanup(struct sun6i_csi_device *csi_dev)
|
|
{
|
|
struct v4l2_subdev *subdev = &csi_dev->bridge.subdev;
|
|
struct v4l2_async_notifier *notifier = &csi_dev->bridge.notifier;
|
|
|
|
v4l2_async_nf_unregister(notifier);
|
|
v4l2_async_nf_cleanup(notifier);
|
|
|
|
v4l2_device_unregister_subdev(subdev);
|
|
|
|
media_entity_cleanup(&subdev->entity);
|
|
}
|