perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / media / platform / xilinx / xilinx-vip.c
blob3112591295045196a4952a690c08efbfceb6fe96
1 /*
2 * Xilinx Video IP Core
4 * Copyright (C) 2013-2015 Ideas on Board
5 * Copyright (C) 2013-2015 Xilinx, Inc.
7 * Contacts: Hyun Kwon <hyun.kwon@xilinx.com>
8 * Laurent Pinchart <laurent.pinchart@ideasonboard.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/clk.h>
16 #include <linux/export.h>
17 #include <linux/kernel.h>
18 #include <linux/of.h>
19 #include <linux/platform_device.h>
21 #include <dt-bindings/media/xilinx-vip.h>
23 #include "xilinx-vip.h"
25 /* -----------------------------------------------------------------------------
26 * Helper functions
29 static const struct xvip_video_format xvip_video_formats[] = {
30 { XVIP_VF_YUV_422, 8, NULL, MEDIA_BUS_FMT_UYVY8_1X16,
31 2, V4L2_PIX_FMT_YUYV, "4:2:2, packed, YUYV" },
32 { XVIP_VF_YUV_444, 8, NULL, MEDIA_BUS_FMT_VUY8_1X24,
33 3, V4L2_PIX_FMT_YUV444, "4:4:4, packed, YUYV" },
34 { XVIP_VF_RBG, 8, NULL, MEDIA_BUS_FMT_RBG888_1X24,
35 3, 0, NULL },
36 { XVIP_VF_MONO_SENSOR, 8, "mono", MEDIA_BUS_FMT_Y8_1X8,
37 1, V4L2_PIX_FMT_GREY, "Greyscale 8-bit" },
38 { XVIP_VF_MONO_SENSOR, 8, "rggb", MEDIA_BUS_FMT_SRGGB8_1X8,
39 1, V4L2_PIX_FMT_SGRBG8, "Bayer 8-bit RGGB" },
40 { XVIP_VF_MONO_SENSOR, 8, "grbg", MEDIA_BUS_FMT_SGRBG8_1X8,
41 1, V4L2_PIX_FMT_SGRBG8, "Bayer 8-bit GRBG" },
42 { XVIP_VF_MONO_SENSOR, 8, "gbrg", MEDIA_BUS_FMT_SGBRG8_1X8,
43 1, V4L2_PIX_FMT_SGBRG8, "Bayer 8-bit GBRG" },
44 { XVIP_VF_MONO_SENSOR, 8, "bggr", MEDIA_BUS_FMT_SBGGR8_1X8,
45 1, V4L2_PIX_FMT_SBGGR8, "Bayer 8-bit BGGR" },
48 /**
49 * xvip_get_format_by_code - Retrieve format information for a media bus code
50 * @code: the format media bus code
52 * Return: a pointer to the format information structure corresponding to the
53 * given V4L2 media bus format @code, or ERR_PTR if no corresponding format can
54 * be found.
56 const struct xvip_video_format *xvip_get_format_by_code(unsigned int code)
58 unsigned int i;
60 for (i = 0; i < ARRAY_SIZE(xvip_video_formats); ++i) {
61 const struct xvip_video_format *format = &xvip_video_formats[i];
63 if (format->code == code)
64 return format;
67 return ERR_PTR(-EINVAL);
69 EXPORT_SYMBOL_GPL(xvip_get_format_by_code);
71 /**
72 * xvip_get_format_by_fourcc - Retrieve format information for a 4CC
73 * @fourcc: the format 4CC
75 * Return: a pointer to the format information structure corresponding to the
76 * given V4L2 format @fourcc, or ERR_PTR if no corresponding format can be
77 * found.
79 const struct xvip_video_format *xvip_get_format_by_fourcc(u32 fourcc)
81 unsigned int i;
83 for (i = 0; i < ARRAY_SIZE(xvip_video_formats); ++i) {
84 const struct xvip_video_format *format = &xvip_video_formats[i];
86 if (format->fourcc == fourcc)
87 return format;
90 return ERR_PTR(-EINVAL);
92 EXPORT_SYMBOL_GPL(xvip_get_format_by_fourcc);
94 /**
95 * xvip_of_get_format - Parse a device tree node and return format information
96 * @node: the device tree node
98 * Read the xlnx,video-format, xlnx,video-width and xlnx,cfa-pattern properties
99 * from the device tree @node passed as an argument and return the corresponding
100 * format information.
102 * Return: a pointer to the format information structure corresponding to the
103 * format name and width, or ERR_PTR if no corresponding format can be found.
105 const struct xvip_video_format *xvip_of_get_format(struct device_node *node)
107 const char *pattern = "mono";
108 unsigned int vf_code;
109 unsigned int i;
110 u32 width;
111 int ret;
113 ret = of_property_read_u32(node, "xlnx,video-format", &vf_code);
114 if (ret < 0)
115 return ERR_PTR(ret);
117 ret = of_property_read_u32(node, "xlnx,video-width", &width);
118 if (ret < 0)
119 return ERR_PTR(ret);
121 if (vf_code == XVIP_VF_MONO_SENSOR)
122 of_property_read_string(node, "xlnx,cfa-pattern", &pattern);
124 for (i = 0; i < ARRAY_SIZE(xvip_video_formats); ++i) {
125 const struct xvip_video_format *format = &xvip_video_formats[i];
127 if (format->vf_code != vf_code || format->width != width)
128 continue;
130 if (vf_code == XVIP_VF_MONO_SENSOR &&
131 strcmp(pattern, format->pattern))
132 continue;
134 return format;
137 return ERR_PTR(-EINVAL);
139 EXPORT_SYMBOL_GPL(xvip_of_get_format);
142 * xvip_set_format_size - Set the media bus frame format size
143 * @format: V4L2 frame format on media bus
144 * @fmt: media bus format
146 * Set the media bus frame format size. The width / height from the subdevice
147 * format are set to the given media bus format. The new format size is stored
148 * in @format. The width and height are clamped using default min / max values.
150 void xvip_set_format_size(struct v4l2_mbus_framefmt *format,
151 const struct v4l2_subdev_format *fmt)
153 format->width = clamp_t(unsigned int, fmt->format.width,
154 XVIP_MIN_WIDTH, XVIP_MAX_WIDTH);
155 format->height = clamp_t(unsigned int, fmt->format.height,
156 XVIP_MIN_HEIGHT, XVIP_MAX_HEIGHT);
158 EXPORT_SYMBOL_GPL(xvip_set_format_size);
161 * xvip_clr_or_set - Clear or set the register with a bitmask
162 * @xvip: Xilinx Video IP device
163 * @addr: address of register
164 * @mask: bitmask to be set or cleared
165 * @set: boolean flag indicating whether to set or clear
167 * Clear or set the register at address @addr with a bitmask @mask depending on
168 * the boolean flag @set. When the flag @set is true, the bitmask is set in
169 * the register, otherwise the bitmask is cleared from the register
170 * when the flag @set is false.
172 * Fox eample, this function can be used to set a control with a boolean value
173 * requested by users. If the caller knows whether to set or clear in the first
174 * place, the caller should call xvip_clr() or xvip_set() directly instead of
175 * using this function.
177 void xvip_clr_or_set(struct xvip_device *xvip, u32 addr, u32 mask, bool set)
179 u32 reg;
181 reg = xvip_read(xvip, addr);
182 reg = set ? reg | mask : reg & ~mask;
183 xvip_write(xvip, addr, reg);
185 EXPORT_SYMBOL_GPL(xvip_clr_or_set);
188 * xvip_clr_and_set - Clear and set the register with a bitmask
189 * @xvip: Xilinx Video IP device
190 * @addr: address of register
191 * @clr: bitmask to be cleared
192 * @set: bitmask to be set
194 * Clear a bit(s) of mask @clr in the register at address @addr, then set
195 * a bit(s) of mask @set in the register after.
197 void xvip_clr_and_set(struct xvip_device *xvip, u32 addr, u32 clr, u32 set)
199 u32 reg;
201 reg = xvip_read(xvip, addr);
202 reg &= ~clr;
203 reg |= set;
204 xvip_write(xvip, addr, reg);
206 EXPORT_SYMBOL_GPL(xvip_clr_and_set);
208 int xvip_init_resources(struct xvip_device *xvip)
210 struct platform_device *pdev = to_platform_device(xvip->dev);
211 struct resource *res;
213 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
214 xvip->iomem = devm_ioremap_resource(xvip->dev, res);
215 if (IS_ERR(xvip->iomem))
216 return PTR_ERR(xvip->iomem);
218 xvip->clk = devm_clk_get(xvip->dev, NULL);
219 if (IS_ERR(xvip->clk))
220 return PTR_ERR(xvip->clk);
222 clk_prepare_enable(xvip->clk);
223 return 0;
225 EXPORT_SYMBOL_GPL(xvip_init_resources);
227 void xvip_cleanup_resources(struct xvip_device *xvip)
229 clk_disable_unprepare(xvip->clk);
231 EXPORT_SYMBOL_GPL(xvip_cleanup_resources);
233 /* -----------------------------------------------------------------------------
234 * Subdev operations handlers
238 * xvip_enum_mbus_code - Enumerate the media format code
239 * @subdev: V4L2 subdevice
240 * @cfg: V4L2 subdev pad configuration
241 * @code: returning media bus code
243 * Enumerate the media bus code of the subdevice. Return the corresponding
244 * pad format code. This function only works for subdevices with fixed format
245 * on all pads. Subdevices with multiple format should have their own
246 * function to enumerate mbus codes.
248 * Return: 0 if the media bus code is found, or -EINVAL if the format index
249 * is not valid.
251 int xvip_enum_mbus_code(struct v4l2_subdev *subdev,
252 struct v4l2_subdev_pad_config *cfg,
253 struct v4l2_subdev_mbus_code_enum *code)
255 struct v4l2_mbus_framefmt *format;
257 /* Enumerating frame sizes based on the active configuration isn't
258 * supported yet.
260 if (code->which == V4L2_SUBDEV_FORMAT_ACTIVE)
261 return -EINVAL;
263 if (code->index)
264 return -EINVAL;
266 format = v4l2_subdev_get_try_format(subdev, cfg, code->pad);
268 code->code = format->code;
270 return 0;
272 EXPORT_SYMBOL_GPL(xvip_enum_mbus_code);
275 * xvip_enum_frame_size - Enumerate the media bus frame size
276 * @subdev: V4L2 subdevice
277 * @cfg: V4L2 subdev pad configuration
278 * @fse: returning media bus frame size
280 * This function is a drop-in implementation of the subdev enum_frame_size pad
281 * operation. It assumes that the subdevice has one sink pad and one source
282 * pad, and that the format on the source pad is always identical to the
283 * format on the sink pad. Entities with different requirements need to
284 * implement their own enum_frame_size handlers.
286 * Return: 0 if the media bus frame size is found, or -EINVAL
287 * if the index or the code is not valid.
289 int xvip_enum_frame_size(struct v4l2_subdev *subdev,
290 struct v4l2_subdev_pad_config *cfg,
291 struct v4l2_subdev_frame_size_enum *fse)
293 struct v4l2_mbus_framefmt *format;
295 /* Enumerating frame sizes based on the active configuration isn't
296 * supported yet.
298 if (fse->which == V4L2_SUBDEV_FORMAT_ACTIVE)
299 return -EINVAL;
301 format = v4l2_subdev_get_try_format(subdev, cfg, fse->pad);
303 if (fse->index || fse->code != format->code)
304 return -EINVAL;
306 if (fse->pad == XVIP_PAD_SINK) {
307 fse->min_width = XVIP_MIN_WIDTH;
308 fse->max_width = XVIP_MAX_WIDTH;
309 fse->min_height = XVIP_MIN_HEIGHT;
310 fse->max_height = XVIP_MAX_HEIGHT;
311 } else {
312 /* The size on the source pad is fixed and always identical to
313 * the size on the sink pad.
315 fse->min_width = format->width;
316 fse->max_width = format->width;
317 fse->min_height = format->height;
318 fse->max_height = format->height;
321 return 0;
323 EXPORT_SYMBOL_GPL(xvip_enum_frame_size);