/** * 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.
*/ conststruct xvip_video_format *xvip_get_format_by_code(unsignedint code)
{ unsignedint i;
for (i = 0; i < ARRAY_SIZE(xvip_video_formats); ++i) { conststruct xvip_video_format *format = &xvip_video_formats[i];
/** * 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).
*/ conststruct xvip_video_format *xvip_get_format_by_fourcc(u32 fourcc)
{ unsignedint i;
for (i = 0; i < ARRAY_SIZE(xvip_video_formats); ++i) { conststruct xvip_video_format *format = &xvip_video_formats[i];
/** * 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.
*/ conststruct xvip_video_format *xvip_of_get_format(struct device_node *node)
{ constchar *pattern = "mono"; unsignedint vf_code; unsignedint i;
u32 width; int ret;
ret = of_property_read_u32(node, "xlnx,video-format", &vf_code); if (ret < 0) return ERR_PTR(ret);
ret = of_property_read_u32(node, "xlnx,video-width", &width); if (ret < 0) return ERR_PTR(ret);
if (vf_code == XVIP_VF_MONO_SENSOR)
of_property_read_string(node, "xlnx,cfa-pattern", &pattern);
for (i = 0; i < ARRAY_SIZE(xvip_video_formats); ++i) { conststruct xvip_video_format *format = &xvip_video_formats[i];
if (format->vf_code != vf_code || format->width != width) continue;
if (vf_code == XVIP_VF_MONO_SENSOR &&
strcmp(pattern, format->pattern)) continue;
/** * 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, conststruct v4l2_subdev_format *fmt)
{
format->width = clamp_t(unsignedint, fmt->format.width,
XVIP_MIN_WIDTH, XVIP_MAX_WIDTH);
format->height = clamp_t(unsignedint, fmt->format.height,
XVIP_MIN_HEIGHT, XVIP_MAX_HEIGHT);
}
EXPORT_SYMBOL_GPL(xvip_set_format_size);
/** * 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)
{
u32 reg;
/** * 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)
{
u32 reg;
/** * 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)
{ struct v4l2_mbus_framefmt *format;
/* Enumerating frame sizes based on the active configuration isn't * supported yet.
*/ if (code->which == V4L2_SUBDEV_FORMAT_ACTIVE) return -EINVAL;
if (code->index) return -EINVAL;
format = v4l2_subdev_state_get_format(sd_state, code->pad);
/** * 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)
{ struct v4l2_mbus_framefmt *format;
/* Enumerating frame sizes based on the active configuration isn't * supported yet.
*/ if (fse->which == V4L2_SUBDEV_FORMAT_ACTIVE) return -EINVAL;
format = v4l2_subdev_state_get_format(sd_state, fse->pad);
if (fse->index || fse->code != format->code) return -EINVAL;
if (fse->pad == XVIP_PAD_SINK) {
fse->min_width = XVIP_MIN_WIDTH;
fse->max_width = XVIP_MAX_WIDTH;
fse->min_height = XVIP_MIN_HEIGHT;
fse->max_height = XVIP_MAX_HEIGHT;
} else { /* The size on the source pad is fixed and always identical to * the size on the sink pad.
*/
fse->min_width = format->width;
fse->max_width = format->width;
fse->min_height = format->height;
fse->max_height = format->height;
}
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