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1/*
2 * Copyright (c) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
3 *
4 * DRM core format related functions
5 *
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that copyright
9 * notice and this permission notice appear in supporting documentation, and
10 * that the name of the copyright holders not be used in advertising or
11 * publicity pertaining to distribution of the software without specific,
12 * written prior permission. The copyright holders make no representations
13 * about the suitability of this software for any purpose. It is provided "as
14 * is" without express or implied warranty.
15 *
16 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
17 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
18 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
19 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
20 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
21 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
22 * OF THIS SOFTWARE.
23 */
24
25#include <linux/bug.h>
26#include <linux/ctype.h>
27#include <linux/export.h>
28#include <linux/kernel.h>
29
30#include <drm/drmP.h>
31#include <drm/drm_fourcc.h>
32
33static char printable_char(int c)
34{
35 return isascii(c) && isprint(c) ? c : '?';
36}
37
38/**
39 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description
40 * @bpp: bits per pixels
41 * @depth: bit depth per pixel
42 *
43 * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
44 * Useful in fbdev emulation code, since that deals in those values.
45 */
46uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
47{
48 uint32_t fmt;
49
50 switch (bpp) {
51 case 8:
52 fmt = DRM_FORMAT_C8;
53 break;
54 case 16:
55 if (depth == 15)
56 fmt = DRM_FORMAT_XRGB1555;
57 else
58 fmt = DRM_FORMAT_RGB565;
59 break;
60 case 24:
61 fmt = DRM_FORMAT_RGB888;
62 break;
63 case 32:
64 if (depth == 24)
65 fmt = DRM_FORMAT_XRGB8888;
66 else if (depth == 30)
67 fmt = DRM_FORMAT_XRGB2101010;
68 else
69 fmt = DRM_FORMAT_ARGB8888;
70 break;
71 default:
72 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
73 fmt = DRM_FORMAT_XRGB8888;
74 break;
75 }
76
77 return fmt;
78}
79EXPORT_SYMBOL(drm_mode_legacy_fb_format);
80
81/**
82 * drm_get_format_name - fill a string with a drm fourcc format's name
83 * @format: format to compute name of
84 * @buf: caller-supplied buffer
85 */
86const char *drm_get_format_name(uint32_t format, struct drm_format_name_buf *buf)
87{
88 snprintf(buf->str, sizeof(buf->str),
89 "%c%c%c%c %s-endian (0x%08x)",
90 printable_char(format & 0xff),
91 printable_char((format >> 8) & 0xff),
92 printable_char((format >> 16) & 0xff),
93 printable_char((format >> 24) & 0x7f),
94 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
95 format);
96
97 return buf->str;
98}
99EXPORT_SYMBOL(drm_get_format_name);
100
101/*
102 * Internal function to query information for a given format. See
103 * drm_format_info() for the public API.
104 */
105const struct drm_format_info *__drm_format_info(u32 format)
106{
107 static const struct drm_format_info formats[] = {
108 { .format = DRM_FORMAT_C8, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 },
109 { .format = DRM_FORMAT_RGB332, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 },
110 { .format = DRM_FORMAT_BGR233, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 },
111 { .format = DRM_FORMAT_XRGB4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
112 { .format = DRM_FORMAT_XBGR4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
113 { .format = DRM_FORMAT_RGBX4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
114 { .format = DRM_FORMAT_BGRX4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
115 { .format = DRM_FORMAT_ARGB4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
116 { .format = DRM_FORMAT_ABGR4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
117 { .format = DRM_FORMAT_RGBA4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
118 { .format = DRM_FORMAT_BGRA4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
119 { .format = DRM_FORMAT_XRGB1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
120 { .format = DRM_FORMAT_XBGR1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
121 { .format = DRM_FORMAT_RGBX5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
122 { .format = DRM_FORMAT_BGRX5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
123 { .format = DRM_FORMAT_ARGB1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
124 { .format = DRM_FORMAT_ABGR1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
125 { .format = DRM_FORMAT_RGBA5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
126 { .format = DRM_FORMAT_BGRA5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
127 { .format = DRM_FORMAT_RGB565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
128 { .format = DRM_FORMAT_BGR565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
129 { .format = DRM_FORMAT_RGB888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 },
130 { .format = DRM_FORMAT_BGR888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 },
131 { .format = DRM_FORMAT_XRGB8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
132 { .format = DRM_FORMAT_XBGR8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
133 { .format = DRM_FORMAT_RGBX8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
134 { .format = DRM_FORMAT_BGRX8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
135 { .format = DRM_FORMAT_RGB565_A8, .depth = 24, .num_planes = 2, .cpp = { 2, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
136 { .format = DRM_FORMAT_BGR565_A8, .depth = 24, .num_planes = 2, .cpp = { 2, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
137 { .format = DRM_FORMAT_XRGB2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
138 { .format = DRM_FORMAT_XBGR2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
139 { .format = DRM_FORMAT_RGBX1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
140 { .format = DRM_FORMAT_BGRX1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
141 { .format = DRM_FORMAT_ARGB2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
142 { .format = DRM_FORMAT_ABGR2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
143 { .format = DRM_FORMAT_RGBA1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
144 { .format = DRM_FORMAT_BGRA1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
145 { .format = DRM_FORMAT_ARGB8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
146 { .format = DRM_FORMAT_ABGR8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
147 { .format = DRM_FORMAT_RGBA8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
148 { .format = DRM_FORMAT_BGRA8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
149 { .format = DRM_FORMAT_RGB888_A8, .depth = 32, .num_planes = 2, .cpp = { 3, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
150 { .format = DRM_FORMAT_BGR888_A8, .depth = 32, .num_planes = 2, .cpp = { 3, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
151 { .format = DRM_FORMAT_XRGB8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
152 { .format = DRM_FORMAT_XBGR8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
153 { .format = DRM_FORMAT_RGBX8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
154 { .format = DRM_FORMAT_BGRX8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
155 { .format = DRM_FORMAT_YUV410, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 4 },
156 { .format = DRM_FORMAT_YVU410, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 4 },
157 { .format = DRM_FORMAT_YUV411, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 1 },
158 { .format = DRM_FORMAT_YVU411, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 1 },
159 { .format = DRM_FORMAT_YUV420, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 2 },
160 { .format = DRM_FORMAT_YVU420, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 2 },
161 { .format = DRM_FORMAT_YUV422, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 1 },
162 { .format = DRM_FORMAT_YVU422, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 1 },
163 { .format = DRM_FORMAT_YUV444, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1 },
164 { .format = DRM_FORMAT_YVU444, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1 },
165 { .format = DRM_FORMAT_NV12, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2 },
166 { .format = DRM_FORMAT_NV21, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2 },
167 { .format = DRM_FORMAT_NV16, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 1 },
168 { .format = DRM_FORMAT_NV61, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 1 },
169 { .format = DRM_FORMAT_NV24, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 1, .vsub = 1 },
170 { .format = DRM_FORMAT_NV42, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 1, .vsub = 1 },
171 { .format = DRM_FORMAT_YUYV, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1 },
172 { .format = DRM_FORMAT_YVYU, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1 },
173 { .format = DRM_FORMAT_UYVY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1 },
174 { .format = DRM_FORMAT_VYUY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1 },
175 { .format = DRM_FORMAT_AYUV, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
176 };
177
178 unsigned int i;
179
180 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
181 if (formats[i].format == format)
182 return &formats[i];
183 }
184
185 return NULL;
186}
187
188/**
189 * drm_format_info - query information for a given format
190 * @format: pixel format (DRM_FORMAT_*)
191 *
192 * The caller should only pass a supported pixel format to this function.
193 * Unsupported pixel formats will generate a warning in the kernel log.
194 *
195 * Returns:
196 * The instance of struct drm_format_info that describes the pixel format, or
197 * NULL if the format is unsupported.
198 */
199const struct drm_format_info *drm_format_info(u32 format)
200{
201 const struct drm_format_info *info;
202
203 info = __drm_format_info(format);
204 WARN_ON(!info);
205 return info;
206}
207EXPORT_SYMBOL(drm_format_info);
208
209/**
210 * drm_get_format_info - query information for a given framebuffer configuration
211 * @dev: DRM device
212 * @mode_cmd: metadata from the userspace fb creation request
213 *
214 * Returns:
215 * The instance of struct drm_format_info that describes the pixel format, or
216 * NULL if the format is unsupported.
217 */
218const struct drm_format_info *
219drm_get_format_info(struct drm_device *dev,
220 const struct drm_mode_fb_cmd2 *mode_cmd)
221{
222 const struct drm_format_info *info = NULL;
223
224 if (dev->mode_config.funcs->get_format_info)
225 info = dev->mode_config.funcs->get_format_info(mode_cmd);
226
227 if (!info)
228 info = drm_format_info(mode_cmd->pixel_format);
229
230 return info;
231}
232EXPORT_SYMBOL(drm_get_format_info);
233
234/**
235 * drm_format_num_planes - get the number of planes for format
236 * @format: pixel format (DRM_FORMAT_*)
237 *
238 * Returns:
239 * The number of planes used by the specified pixel format.
240 */
241int drm_format_num_planes(uint32_t format)
242{
243 const struct drm_format_info *info;
244
245 info = drm_format_info(format);
246 return info ? info->num_planes : 1;
247}
248EXPORT_SYMBOL(drm_format_num_planes);
249
250/**
251 * drm_format_plane_cpp - determine the bytes per pixel value
252 * @format: pixel format (DRM_FORMAT_*)
253 * @plane: plane index
254 *
255 * Returns:
256 * The bytes per pixel value for the specified plane.
257 */
258int drm_format_plane_cpp(uint32_t format, int plane)
259{
260 const struct drm_format_info *info;
261
262 info = drm_format_info(format);
263 if (!info || plane >= info->num_planes)
264 return 0;
265
266 return info->cpp[plane];
267}
268EXPORT_SYMBOL(drm_format_plane_cpp);
269
270/**
271 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
272 * @format: pixel format (DRM_FORMAT_*)
273 *
274 * Returns:
275 * The horizontal chroma subsampling factor for the
276 * specified pixel format.
277 */
278int drm_format_horz_chroma_subsampling(uint32_t format)
279{
280 const struct drm_format_info *info;
281
282 info = drm_format_info(format);
283 return info ? info->hsub : 1;
284}
285EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
286
287/**
288 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
289 * @format: pixel format (DRM_FORMAT_*)
290 *
291 * Returns:
292 * The vertical chroma subsampling factor for the
293 * specified pixel format.
294 */
295int drm_format_vert_chroma_subsampling(uint32_t format)
296{
297 const struct drm_format_info *info;
298
299 info = drm_format_info(format);
300 return info ? info->vsub : 1;
301}
302EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
303
304/**
305 * drm_format_plane_width - width of the plane given the first plane
306 * @width: width of the first plane
307 * @format: pixel format
308 * @plane: plane index
309 *
310 * Returns:
311 * The width of @plane, given that the width of the first plane is @width.
312 */
313int drm_format_plane_width(int width, uint32_t format, int plane)
314{
315 const struct drm_format_info *info;
316
317 info = drm_format_info(format);
318 if (!info || plane >= info->num_planes)
319 return 0;
320
321 if (plane == 0)
322 return width;
323
324 return width / info->hsub;
325}
326EXPORT_SYMBOL(drm_format_plane_width);
327
328/**
329 * drm_format_plane_height - height of the plane given the first plane
330 * @height: height of the first plane
331 * @format: pixel format
332 * @plane: plane index
333 *
334 * Returns:
335 * The height of @plane, given that the height of the first plane is @height.
336 */
337int drm_format_plane_height(int height, uint32_t format, int plane)
338{
339 const struct drm_format_info *info;
340
341 info = drm_format_info(format);
342 if (!info || plane >= info->num_planes)
343 return 0;
344
345 if (plane == 0)
346 return height;
347
348 return height / info->vsub;
349}
350EXPORT_SYMBOL(drm_format_plane_height);
1/*
2 * Copyright (c) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
3 *
4 * DRM core format related functions
5 *
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that copyright
9 * notice and this permission notice appear in supporting documentation, and
10 * that the name of the copyright holders not be used in advertising or
11 * publicity pertaining to distribution of the software without specific,
12 * written prior permission. The copyright holders make no representations
13 * about the suitability of this software for any purpose. It is provided "as
14 * is" without express or implied warranty.
15 *
16 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
17 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
18 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
19 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
20 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
21 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
22 * OF THIS SOFTWARE.
23 */
24
25#include <linux/bug.h>
26#include <linux/ctype.h>
27#include <linux/export.h>
28#include <linux/kernel.h>
29
30#include <drm/drm_device.h>
31#include <drm/drm_fourcc.h>
32
33/**
34 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description
35 * @bpp: bits per pixels
36 * @depth: bit depth per pixel
37 *
38 * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
39 * Useful in fbdev emulation code, since that deals in those values.
40 */
41uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
42{
43 uint32_t fmt = DRM_FORMAT_INVALID;
44
45 switch (bpp) {
46 case 8:
47 if (depth == 8)
48 fmt = DRM_FORMAT_C8;
49 break;
50
51 case 16:
52 switch (depth) {
53 case 15:
54 fmt = DRM_FORMAT_XRGB1555;
55 break;
56 case 16:
57 fmt = DRM_FORMAT_RGB565;
58 break;
59 default:
60 break;
61 }
62 break;
63
64 case 24:
65 if (depth == 24)
66 fmt = DRM_FORMAT_RGB888;
67 break;
68
69 case 32:
70 switch (depth) {
71 case 24:
72 fmt = DRM_FORMAT_XRGB8888;
73 break;
74 case 30:
75 fmt = DRM_FORMAT_XRGB2101010;
76 break;
77 case 32:
78 fmt = DRM_FORMAT_ARGB8888;
79 break;
80 default:
81 break;
82 }
83 break;
84
85 default:
86 break;
87 }
88
89 return fmt;
90}
91EXPORT_SYMBOL(drm_mode_legacy_fb_format);
92
93/**
94 * drm_driver_legacy_fb_format - compute drm fourcc code from legacy description
95 * @dev: DRM device
96 * @bpp: bits per pixels
97 * @depth: bit depth per pixel
98 *
99 * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
100 * Unlike drm_mode_legacy_fb_format() this looks at the drivers mode_config,
101 * and depending on the &drm_mode_config.quirk_addfb_prefer_host_byte_order flag
102 * it returns little endian byte order or host byte order framebuffer formats.
103 */
104uint32_t drm_driver_legacy_fb_format(struct drm_device *dev,
105 uint32_t bpp, uint32_t depth)
106{
107 uint32_t fmt = drm_mode_legacy_fb_format(bpp, depth);
108
109 if (dev->mode_config.quirk_addfb_prefer_host_byte_order) {
110 if (fmt == DRM_FORMAT_XRGB8888)
111 fmt = DRM_FORMAT_HOST_XRGB8888;
112 if (fmt == DRM_FORMAT_ARGB8888)
113 fmt = DRM_FORMAT_HOST_ARGB8888;
114 if (fmt == DRM_FORMAT_RGB565)
115 fmt = DRM_FORMAT_HOST_RGB565;
116 if (fmt == DRM_FORMAT_XRGB1555)
117 fmt = DRM_FORMAT_HOST_XRGB1555;
118 }
119
120 if (dev->mode_config.quirk_addfb_prefer_xbgr_30bpp &&
121 fmt == DRM_FORMAT_XRGB2101010)
122 fmt = DRM_FORMAT_XBGR2101010;
123
124 return fmt;
125}
126EXPORT_SYMBOL(drm_driver_legacy_fb_format);
127
128/*
129 * Internal function to query information for a given format. See
130 * drm_format_info() for the public API.
131 */
132const struct drm_format_info *__drm_format_info(u32 format)
133{
134 static const struct drm_format_info formats[] = {
135 { .format = DRM_FORMAT_C8, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 },
136 { .format = DRM_FORMAT_RGB332, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 },
137 { .format = DRM_FORMAT_BGR233, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 },
138 { .format = DRM_FORMAT_XRGB4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
139 { .format = DRM_FORMAT_XBGR4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
140 { .format = DRM_FORMAT_RGBX4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
141 { .format = DRM_FORMAT_BGRX4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
142 { .format = DRM_FORMAT_ARGB4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
143 { .format = DRM_FORMAT_ABGR4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
144 { .format = DRM_FORMAT_RGBA4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
145 { .format = DRM_FORMAT_BGRA4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
146 { .format = DRM_FORMAT_XRGB1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
147 { .format = DRM_FORMAT_XBGR1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
148 { .format = DRM_FORMAT_RGBX5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
149 { .format = DRM_FORMAT_BGRX5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
150 { .format = DRM_FORMAT_ARGB1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
151 { .format = DRM_FORMAT_ABGR1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
152 { .format = DRM_FORMAT_RGBA5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
153 { .format = DRM_FORMAT_BGRA5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
154 { .format = DRM_FORMAT_RGB565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
155 { .format = DRM_FORMAT_BGR565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
156 { .format = DRM_FORMAT_RGB888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 },
157 { .format = DRM_FORMAT_BGR888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 },
158 { .format = DRM_FORMAT_XRGB8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
159 { .format = DRM_FORMAT_XBGR8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
160 { .format = DRM_FORMAT_RGBX8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
161 { .format = DRM_FORMAT_BGRX8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
162 { .format = DRM_FORMAT_RGB565_A8, .depth = 24, .num_planes = 2, .cpp = { 2, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
163 { .format = DRM_FORMAT_BGR565_A8, .depth = 24, .num_planes = 2, .cpp = { 2, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
164 { .format = DRM_FORMAT_XRGB2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
165 { .format = DRM_FORMAT_XBGR2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
166 { .format = DRM_FORMAT_RGBX1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
167 { .format = DRM_FORMAT_BGRX1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
168 { .format = DRM_FORMAT_ARGB2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
169 { .format = DRM_FORMAT_ABGR2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
170 { .format = DRM_FORMAT_RGBA1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
171 { .format = DRM_FORMAT_BGRA1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
172 { .format = DRM_FORMAT_ARGB8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
173 { .format = DRM_FORMAT_ABGR8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
174 { .format = DRM_FORMAT_RGBA8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
175 { .format = DRM_FORMAT_BGRA8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
176 { .format = DRM_FORMAT_XRGB16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 },
177 { .format = DRM_FORMAT_XBGR16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 },
178 { .format = DRM_FORMAT_ARGB16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
179 { .format = DRM_FORMAT_ABGR16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
180 { .format = DRM_FORMAT_AXBXGXRX106106106106, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
181 { .format = DRM_FORMAT_XRGB16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 },
182 { .format = DRM_FORMAT_XBGR16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 },
183 { .format = DRM_FORMAT_ARGB16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
184 { .format = DRM_FORMAT_ABGR16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
185 { .format = DRM_FORMAT_RGB888_A8, .depth = 32, .num_planes = 2, .cpp = { 3, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
186 { .format = DRM_FORMAT_BGR888_A8, .depth = 32, .num_planes = 2, .cpp = { 3, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
187 { .format = DRM_FORMAT_XRGB8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
188 { .format = DRM_FORMAT_XBGR8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
189 { .format = DRM_FORMAT_RGBX8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
190 { .format = DRM_FORMAT_BGRX8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
191 { .format = DRM_FORMAT_YUV410, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 4, .is_yuv = true },
192 { .format = DRM_FORMAT_YVU410, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 4, .is_yuv = true },
193 { .format = DRM_FORMAT_YUV411, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 1, .is_yuv = true },
194 { .format = DRM_FORMAT_YVU411, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 1, .is_yuv = true },
195 { .format = DRM_FORMAT_YUV420, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 2, .is_yuv = true },
196 { .format = DRM_FORMAT_YVU420, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 2, .is_yuv = true },
197 { .format = DRM_FORMAT_YUV422, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 1, .is_yuv = true },
198 { .format = DRM_FORMAT_YVU422, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 1, .is_yuv = true },
199 { .format = DRM_FORMAT_YUV444, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1, .is_yuv = true },
200 { .format = DRM_FORMAT_YVU444, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1, .is_yuv = true },
201 { .format = DRM_FORMAT_NV12, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true },
202 { .format = DRM_FORMAT_NV21, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true },
203 { .format = DRM_FORMAT_NV16, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
204 { .format = DRM_FORMAT_NV61, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
205 { .format = DRM_FORMAT_NV24, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
206 { .format = DRM_FORMAT_NV42, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
207 { .format = DRM_FORMAT_YUYV, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
208 { .format = DRM_FORMAT_YVYU, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
209 { .format = DRM_FORMAT_UYVY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
210 { .format = DRM_FORMAT_VYUY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
211 { .format = DRM_FORMAT_XYUV8888, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
212 { .format = DRM_FORMAT_VUY888, .depth = 0, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
213 { .format = DRM_FORMAT_AYUV, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true },
214 { .format = DRM_FORMAT_Y210, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
215 { .format = DRM_FORMAT_Y212, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
216 { .format = DRM_FORMAT_Y216, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
217 { .format = DRM_FORMAT_Y410, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true },
218 { .format = DRM_FORMAT_Y412, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true },
219 { .format = DRM_FORMAT_Y416, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true },
220 { .format = DRM_FORMAT_XVYU2101010, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
221 { .format = DRM_FORMAT_XVYU12_16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
222 { .format = DRM_FORMAT_XVYU16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
223 { .format = DRM_FORMAT_Y0L0, .depth = 0, .num_planes = 1,
224 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
225 .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true },
226 { .format = DRM_FORMAT_X0L0, .depth = 0, .num_planes = 1,
227 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
228 .hsub = 2, .vsub = 2, .is_yuv = true },
229 { .format = DRM_FORMAT_Y0L2, .depth = 0, .num_planes = 1,
230 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
231 .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true },
232 { .format = DRM_FORMAT_X0L2, .depth = 0, .num_planes = 1,
233 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
234 .hsub = 2, .vsub = 2, .is_yuv = true },
235 { .format = DRM_FORMAT_P010, .depth = 0, .num_planes = 2,
236 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 },
237 .hsub = 2, .vsub = 2, .is_yuv = true},
238 { .format = DRM_FORMAT_P012, .depth = 0, .num_planes = 2,
239 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 },
240 .hsub = 2, .vsub = 2, .is_yuv = true},
241 { .format = DRM_FORMAT_P016, .depth = 0, .num_planes = 2,
242 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 },
243 .hsub = 2, .vsub = 2, .is_yuv = true},
244 { .format = DRM_FORMAT_P210, .depth = 0,
245 .num_planes = 2, .char_per_block = { 2, 4, 0 },
246 .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 }, .hsub = 2,
247 .vsub = 1, .is_yuv = true },
248 { .format = DRM_FORMAT_VUY101010, .depth = 0,
249 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 1, .vsub = 1,
250 .is_yuv = true },
251 { .format = DRM_FORMAT_YUV420_8BIT, .depth = 0,
252 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 2, .vsub = 2,
253 .is_yuv = true },
254 { .format = DRM_FORMAT_YUV420_10BIT, .depth = 0,
255 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 2, .vsub = 2,
256 .is_yuv = true },
257 { .format = DRM_FORMAT_NV15, .depth = 0,
258 .num_planes = 2, .char_per_block = { 5, 5, 0 },
259 .block_w = { 4, 2, 0 }, .block_h = { 1, 1, 0 }, .hsub = 2,
260 .vsub = 2, .is_yuv = true },
261 { .format = DRM_FORMAT_Q410, .depth = 0,
262 .num_planes = 3, .char_per_block = { 2, 2, 2 },
263 .block_w = { 1, 1, 1 }, .block_h = { 1, 1, 1 }, .hsub = 0,
264 .vsub = 0, .is_yuv = true },
265 { .format = DRM_FORMAT_Q401, .depth = 0,
266 .num_planes = 3, .char_per_block = { 2, 2, 2 },
267 .block_w = { 1, 1, 1 }, .block_h = { 1, 1, 1 }, .hsub = 0,
268 .vsub = 0, .is_yuv = true },
269 };
270
271 unsigned int i;
272
273 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
274 if (formats[i].format == format)
275 return &formats[i];
276 }
277
278 return NULL;
279}
280
281/**
282 * drm_format_info - query information for a given format
283 * @format: pixel format (DRM_FORMAT_*)
284 *
285 * The caller should only pass a supported pixel format to this function.
286 * Unsupported pixel formats will generate a warning in the kernel log.
287 *
288 * Returns:
289 * The instance of struct drm_format_info that describes the pixel format, or
290 * NULL if the format is unsupported.
291 */
292const struct drm_format_info *drm_format_info(u32 format)
293{
294 const struct drm_format_info *info;
295
296 info = __drm_format_info(format);
297 WARN_ON(!info);
298 return info;
299}
300EXPORT_SYMBOL(drm_format_info);
301
302/**
303 * drm_get_format_info - query information for a given framebuffer configuration
304 * @dev: DRM device
305 * @mode_cmd: metadata from the userspace fb creation request
306 *
307 * Returns:
308 * The instance of struct drm_format_info that describes the pixel format, or
309 * NULL if the format is unsupported.
310 */
311const struct drm_format_info *
312drm_get_format_info(struct drm_device *dev,
313 const struct drm_mode_fb_cmd2 *mode_cmd)
314{
315 const struct drm_format_info *info = NULL;
316
317 if (dev->mode_config.funcs->get_format_info)
318 info = dev->mode_config.funcs->get_format_info(mode_cmd);
319
320 if (!info)
321 info = drm_format_info(mode_cmd->pixel_format);
322
323 return info;
324}
325EXPORT_SYMBOL(drm_get_format_info);
326
327/**
328 * drm_format_info_block_width - width in pixels of block.
329 * @info: pixel format info
330 * @plane: plane index
331 *
332 * Returns:
333 * The width in pixels of a block, depending on the plane index.
334 */
335unsigned int drm_format_info_block_width(const struct drm_format_info *info,
336 int plane)
337{
338 if (!info || plane < 0 || plane >= info->num_planes)
339 return 0;
340
341 if (!info->block_w[plane])
342 return 1;
343 return info->block_w[plane];
344}
345EXPORT_SYMBOL(drm_format_info_block_width);
346
347/**
348 * drm_format_info_block_height - height in pixels of a block
349 * @info: pixel format info
350 * @plane: plane index
351 *
352 * Returns:
353 * The height in pixels of a block, depending on the plane index.
354 */
355unsigned int drm_format_info_block_height(const struct drm_format_info *info,
356 int plane)
357{
358 if (!info || plane < 0 || plane >= info->num_planes)
359 return 0;
360
361 if (!info->block_h[plane])
362 return 1;
363 return info->block_h[plane];
364}
365EXPORT_SYMBOL(drm_format_info_block_height);
366
367/**
368 * drm_format_info_min_pitch - computes the minimum required pitch in bytes
369 * @info: pixel format info
370 * @plane: plane index
371 * @buffer_width: buffer width in pixels
372 *
373 * Returns:
374 * The minimum required pitch in bytes for a buffer by taking into consideration
375 * the pixel format information and the buffer width.
376 */
377uint64_t drm_format_info_min_pitch(const struct drm_format_info *info,
378 int plane, unsigned int buffer_width)
379{
380 if (!info || plane < 0 || plane >= info->num_planes)
381 return 0;
382
383 return DIV_ROUND_UP_ULL((u64)buffer_width * info->char_per_block[plane],
384 drm_format_info_block_width(info, plane) *
385 drm_format_info_block_height(info, plane));
386}
387EXPORT_SYMBOL(drm_format_info_min_pitch);