diff options
Diffstat (limited to 'drivers/staging/media/tegra-video/csi.h')
| -rw-r--r-- | drivers/staging/media/tegra-video/csi.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/drivers/staging/media/tegra-video/csi.h b/drivers/staging/media/tegra-video/csi.h new file mode 100644 index 000000000000..93bd2a05797d --- /dev/null +++ b/drivers/staging/media/tegra-video/csi.h @@ -0,0 +1,147 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved. + */ + +#ifndef __TEGRA_CSI_H__ +#define __TEGRA_CSI_H__ + +#include <media/media-entity.h> +#include <media/v4l2-subdev.h> + +/* + * Each CSI brick supports max of 4 lanes that can be used as either + * one x4 port using both CILA and CILB partitions of a CSI brick or can + * be used as two x2 ports with one x2 from CILA and the other x2 from + * CILB. + */ +#define CSI_PORTS_PER_BRICK 2 + +/* each CSI channel can have one sink and one source pads */ +#define TEGRA_CSI_PADS_NUM 2 + +enum tegra_csi_cil_port { + PORT_A = 0, + PORT_B, +}; + +enum tegra_csi_block { + CSI_CIL_AB = 0, + CSI_CIL_CD, + CSI_CIL_EF, +}; + +struct tegra_csi; + +/** + * struct tegra_csi_channel - Tegra CSI channel + * + * @list: list head for this entry + * @subdev: V4L2 subdevice associated with this channel + * @pads: media pads for the subdevice entity + * @numpads: number of pads. + * @csi: Tegra CSI device structure + * @of_node: csi device tree node + * @numlanes: number of lanes used per port/channel + * @csi_port_num: CSI channel port number + * @pg_mode: test pattern generator mode for channel + * @format: active format of the channel + * @framerate: active framerate for TPG + * @h_blank: horizontal blanking for TPG active format + * @v_blank: vertical blanking for TPG active format + */ +struct tegra_csi_channel { + struct list_head list; + struct v4l2_subdev subdev; + struct media_pad pads[TEGRA_CSI_PADS_NUM]; + unsigned int numpads; + struct tegra_csi *csi; + struct device_node *of_node; + unsigned int numlanes; + u8 csi_port_num; + u8 pg_mode; + struct v4l2_mbus_framefmt format; + unsigned int framerate; + unsigned int h_blank; + unsigned int v_blank; +}; + +/** + * struct tpg_framerate - Tegra CSI TPG framerate configuration + * + * @frmsize: frame resolution + * @code: media bus format code + * @h_blank: horizontal blanking used for TPG + * @v_blank: vertical blanking interval used for TPG + * @framerate: framerate achieved with the corresponding blanking intervals, + * format and resolution. + */ +struct tpg_framerate { + struct v4l2_frmsize_discrete frmsize; + u32 code; + unsigned int h_blank; + unsigned int v_blank; + unsigned int framerate; +}; + +/** + * struct tegra_csi_ops - Tegra CSI operations + * + * @csi_start_streaming: programs csi hardware to enable streaming. + * @csi_stop_streaming: programs csi hardware to disable streaming. + * @csi_err_recover: csi hardware block recovery in case of any capture errors + * due to missing source stream or due to improper csi input from + * the external source. + */ +struct tegra_csi_ops { + int (*csi_start_streaming)(struct tegra_csi_channel *csi_chan); + void (*csi_stop_streaming)(struct tegra_csi_channel *csi_chan); + void (*csi_err_recover)(struct tegra_csi_channel *csi_chan); +}; + +/** + * struct tegra_csi_soc - NVIDIA Tegra CSI SoC structure + * + * @ops: csi hardware operations + * @csi_max_channels: supported max streaming channels + * @clk_names: csi and cil clock names + * @num_clks: total clocks count + * @tpg_frmrate_table: csi tpg frame rate table with blanking intervals + * @tpg_frmrate_table_size: size of frame rate table + */ +struct tegra_csi_soc { + const struct tegra_csi_ops *ops; + unsigned int csi_max_channels; + const char * const *clk_names; + unsigned int num_clks; + const struct tpg_framerate *tpg_frmrate_table; + unsigned int tpg_frmrate_table_size; +}; + +/** + * struct tegra_csi - NVIDIA Tegra CSI device structure + * + * @dev: device struct + * @client: host1x_client struct + * @iomem: register base + * @clks: clock for CSI and CIL + * @soc: pointer to SoC data structure + * @ops: csi operations + * @channels: list head for CSI channels + */ +struct tegra_csi { + struct device *dev; + struct host1x_client client; + void __iomem *iomem; + struct clk_bulk_data *clks; + const struct tegra_csi_soc *soc; + const struct tegra_csi_ops *ops; + struct list_head csi_chans; +}; + +#if defined(CONFIG_ARCH_TEGRA_210_SOC) +extern const struct tegra_csi_soc tegra210_csi_soc; +#endif + +void tegra_csi_error_recover(struct v4l2_subdev *subdev); +#endif |