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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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6edb685abb
Add support for Raspberry Pi CFE. The CFE is a hardware block that
contains:
- MIPI D-PHY
- MIPI CSI-2 receiver
- Front End ISP (FE)
The driver has been upported from the Raspberry Pi kernel commit
88a681df9623 ("ARM: dts: bcm2712-rpi: Add i2c<n>_pins labels").
Co-developed-by: Naushir Patuck <naush@raspberrypi.com>
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* RP1 CSI-2 Driver
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*
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* Copyright (c) 2021-2024 Raspberry Pi Ltd.
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* Copyright (c) 2023-2024 Ideas on Board Oy
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*/
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#ifndef _RP1_CSI2_
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#define _RP1_CSI2_
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#include <linux/debugfs.h>
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#include <linux/io.h>
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#include <linux/types.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-subdev.h>
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#include "dphy.h"
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#define CSI2_NUM_CHANNELS 4
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#define CSI2_PAD_SINK 0
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#define CSI2_PAD_FIRST_SOURCE 1
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#define CSI2_PAD_NUM_SOURCES 4
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#define CSI2_NUM_PADS 5
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#define DISCARDS_TABLE_NUM_VCS 4
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enum csi2_mode {
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CSI2_MODE_NORMAL = 0,
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CSI2_MODE_REMAP = 1,
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CSI2_MODE_COMPRESSED = 2,
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CSI2_MODE_FE_STREAMING = 3,
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};
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enum csi2_compression_mode {
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CSI2_COMPRESSION_DELTA = 1,
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CSI2_COMPRESSION_SIMPLE = 2,
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CSI2_COMPRESSION_COMBINED = 3,
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};
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enum discards_table_index {
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DISCARDS_TABLE_OVERFLOW = 0,
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DISCARDS_TABLE_LENGTH_LIMIT,
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DISCARDS_TABLE_UNMATCHED,
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DISCARDS_TABLE_INACTIVE,
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DISCARDS_TABLE_NUM_ENTRIES,
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};
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struct csi2_device {
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/* Parent V4l2 device */
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struct v4l2_device *v4l2_dev;
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void __iomem *base;
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struct dphy_data dphy;
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enum v4l2_mbus_type bus_type;
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unsigned int bus_flags;
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unsigned int num_lines[CSI2_NUM_CHANNELS];
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struct media_pad pad[CSI2_NUM_PADS];
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struct v4l2_subdev sd;
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/* lock for csi2 errors counters */
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spinlock_t errors_lock;
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u32 overflows;
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u32 discards_table[DISCARDS_TABLE_NUM_VCS][DISCARDS_TABLE_NUM_ENTRIES];
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u32 discards_dt_table[DISCARDS_TABLE_NUM_ENTRIES];
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};
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void csi2_isr(struct csi2_device *csi2, bool *sof, bool *eof);
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void csi2_set_buffer(struct csi2_device *csi2, unsigned int channel,
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dma_addr_t dmaaddr, unsigned int stride,
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unsigned int size);
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void csi2_set_compression(struct csi2_device *csi2, unsigned int channel,
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enum csi2_compression_mode mode, unsigned int shift,
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unsigned int offset);
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void csi2_start_channel(struct csi2_device *csi2, unsigned int channel,
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enum csi2_mode mode, bool auto_arm,
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bool pack_bytes, unsigned int width,
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unsigned int height, u8 vc, u8 dt);
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void csi2_stop_channel(struct csi2_device *csi2, unsigned int channel);
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void csi2_open_rx(struct csi2_device *csi2);
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void csi2_close_rx(struct csi2_device *csi2);
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int csi2_init(struct csi2_device *csi2, struct dentry *debugfs);
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void csi2_uninit(struct csi2_device *csi2);
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#endif
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