// SPDX-License-Identifier: GPL-2.0 /* * Xilinx Video IP Core * * Copyright (C) 2013-2015 Ideas on Board * Copyright (C) 2013-2015 Xilinx, Inc. * * Contacts: Hyun Kwon <[email protected]> * Laurent Pinchart <[email protected]> */ #include <linux/clk.h> #include <linux/export.h> #include <linux/kernel.h> #include <linux/of.h> #include <linux/platform_device.h> #include <dt-bindings/media/xilinx-vip.h> #include "xilinx-vip.h" /* ----------------------------------------------------------------------------- * Helper functions */ static const struct xvip_video_format xvip_video_formats[] = …; /** * xvip_get_format_by_code - Retrieve format information for a media bus code * @code: the format media bus code * * Return: a pointer to the format information structure corresponding to the * given V4L2 media bus format @code, or ERR_PTR if no corresponding format can * be found. */ const struct xvip_video_format *xvip_get_format_by_code(unsigned int code) { … } EXPORT_SYMBOL_GPL(…); /** * xvip_get_format_by_fourcc - Retrieve format information for a 4CC * @fourcc: the format 4CC * * Return: a pointer to the format information structure corresponding to the * given V4L2 format @fourcc. If not found, return a pointer to the first * available format (V4L2_PIX_FMT_YUYV). */ const struct xvip_video_format *xvip_get_format_by_fourcc(u32 fourcc) { … } EXPORT_SYMBOL_GPL(…); /** * xvip_of_get_format - Parse a device tree node and return format information * @node: the device tree node * * Read the xlnx,video-format, xlnx,video-width and xlnx,cfa-pattern properties * from the device tree @node passed as an argument and return the corresponding * format information. * * Return: a pointer to the format information structure corresponding to the * format name and width, or ERR_PTR if no corresponding format can be found. */ const struct xvip_video_format *xvip_of_get_format(struct device_node *node) { … } EXPORT_SYMBOL_GPL(…); /** * xvip_set_format_size - Set the media bus frame format size * @format: V4L2 frame format on media bus * @fmt: media bus format * * Set the media bus frame format size. The width / height from the subdevice * format are set to the given media bus format. The new format size is stored * in @format. The width and height are clamped using default min / max values. */ void xvip_set_format_size(struct v4l2_mbus_framefmt *format, const struct v4l2_subdev_format *fmt) { … } EXPORT_SYMBOL_GPL(…); /** * xvip_clr_or_set - Clear or set the register with a bitmask * @xvip: Xilinx Video IP device * @addr: address of register * @mask: bitmask to be set or cleared * @set: boolean flag indicating whether to set or clear * * Clear or set the register at address @addr with a bitmask @mask depending on * the boolean flag @set. When the flag @set is true, the bitmask is set in * the register, otherwise the bitmask is cleared from the register * when the flag @set is false. * * Fox example, this function can be used to set a control with a boolean value * requested by users. If the caller knows whether to set or clear in the first * place, the caller should call xvip_clr() or xvip_set() directly instead of * using this function. */ void xvip_clr_or_set(struct xvip_device *xvip, u32 addr, u32 mask, bool set) { … } EXPORT_SYMBOL_GPL(…); /** * xvip_clr_and_set - Clear and set the register with a bitmask * @xvip: Xilinx Video IP device * @addr: address of register * @clr: bitmask to be cleared * @set: bitmask to be set * * Clear a bit(s) of mask @clr in the register at address @addr, then set * a bit(s) of mask @set in the register after. */ void xvip_clr_and_set(struct xvip_device *xvip, u32 addr, u32 clr, u32 set) { … } EXPORT_SYMBOL_GPL(…); int xvip_init_resources(struct xvip_device *xvip) { … } EXPORT_SYMBOL_GPL(…); void xvip_cleanup_resources(struct xvip_device *xvip) { … } EXPORT_SYMBOL_GPL(…); /* ----------------------------------------------------------------------------- * Subdev operations handlers */ /** * xvip_enum_mbus_code - Enumerate the media format code * @subdev: V4L2 subdevice * @sd_state: V4L2 subdev state * @code: returning media bus code * * Enumerate the media bus code of the subdevice. Return the corresponding * pad format code. This function only works for subdevices with fixed format * on all pads. Subdevices with multiple format should have their own * function to enumerate mbus codes. * * Return: 0 if the media bus code is found, or -EINVAL if the format index * is not valid. */ int xvip_enum_mbus_code(struct v4l2_subdev *subdev, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { … } EXPORT_SYMBOL_GPL(…); /** * xvip_enum_frame_size - Enumerate the media bus frame size * @subdev: V4L2 subdevice * @sd_state: V4L2 subdev state * @fse: returning media bus frame size * * This function is a drop-in implementation of the subdev enum_frame_size pad * operation. It assumes that the subdevice has one sink pad and one source * pad, and that the format on the source pad is always identical to the * format on the sink pad. Entities with different requirements need to * implement their own enum_frame_size handlers. * * Return: 0 if the media bus frame size is found, or -EINVAL * if the index or the code is not valid. */ int xvip_enum_frame_size(struct v4l2_subdev *subdev, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_size_enum *fse) { … } EXPORT_SYMBOL_GPL(…);
Codebase Browser
linux