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 */
drm_mode_legacy_fb_format(uint32_t bpp,uint32_t depth)41 uint32_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 }
91 EXPORT_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 */
drm_driver_legacy_fb_format(struct drm_device * dev,uint32_t bpp,uint32_t depth)104 uint32_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 }
126 EXPORT_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 */
__drm_format_info(u32 format)132 const 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 #ifdef __BIG_ENDIAN
157 { .format = DRM_FORMAT_XRGB1555 | DRM_FORMAT_BIG_ENDIAN, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
158 { .format = DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 },
159 #endif
160 { .format = DRM_FORMAT_RGB888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 },
161 { .format = DRM_FORMAT_BGR888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 },
162 { .format = DRM_FORMAT_XRGB8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
163 { .format = DRM_FORMAT_XBGR8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
164 { .format = DRM_FORMAT_RGBX8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
165 { .format = DRM_FORMAT_BGRX8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
166 { .format = DRM_FORMAT_RGB565_A8, .depth = 24, .num_planes = 2, .cpp = { 2, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
167 { .format = DRM_FORMAT_BGR565_A8, .depth = 24, .num_planes = 2, .cpp = { 2, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
168 { .format = DRM_FORMAT_XRGB2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
169 { .format = DRM_FORMAT_XBGR2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
170 { .format = DRM_FORMAT_RGBX1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
171 { .format = DRM_FORMAT_BGRX1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },
172 { .format = DRM_FORMAT_ARGB2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
173 { .format = DRM_FORMAT_ABGR2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
174 { .format = DRM_FORMAT_RGBA1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
175 { .format = DRM_FORMAT_BGRA1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
176 { .format = DRM_FORMAT_ARGB8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
177 { .format = DRM_FORMAT_ABGR8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
178 { .format = DRM_FORMAT_RGBA8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
179 { .format = DRM_FORMAT_BGRA8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
180 { .format = DRM_FORMAT_XRGB16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 },
181 { .format = DRM_FORMAT_XBGR16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 },
182 { .format = DRM_FORMAT_ARGB16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
183 { .format = DRM_FORMAT_ABGR16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
184 { .format = DRM_FORMAT_AXBXGXRX106106106106, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
185 { .format = DRM_FORMAT_XRGB16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 },
186 { .format = DRM_FORMAT_XBGR16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 },
187 { .format = DRM_FORMAT_ARGB16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
188 { .format = DRM_FORMAT_ABGR16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
189 { .format = DRM_FORMAT_RGB888_A8, .depth = 32, .num_planes = 2, .cpp = { 3, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
190 { .format = DRM_FORMAT_BGR888_A8, .depth = 32, .num_planes = 2, .cpp = { 3, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
191 { .format = DRM_FORMAT_XRGB8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
192 { .format = DRM_FORMAT_XBGR8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
193 { .format = DRM_FORMAT_RGBX8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
194 { .format = DRM_FORMAT_BGRX8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
195 { .format = DRM_FORMAT_YUV410, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 4, .is_yuv = true },
196 { .format = DRM_FORMAT_YVU410, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 4, .is_yuv = true },
197 { .format = DRM_FORMAT_YUV411, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 1, .is_yuv = true },
198 { .format = DRM_FORMAT_YVU411, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 1, .is_yuv = true },
199 { .format = DRM_FORMAT_YUV420, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 2, .is_yuv = true },
200 { .format = DRM_FORMAT_YVU420, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 2, .is_yuv = true },
201 { .format = DRM_FORMAT_YUV422, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 1, .is_yuv = true },
202 { .format = DRM_FORMAT_YVU422, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 1, .is_yuv = true },
203 { .format = DRM_FORMAT_YUV444, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1, .is_yuv = true },
204 { .format = DRM_FORMAT_YVU444, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1, .is_yuv = true },
205 { .format = DRM_FORMAT_NV12, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true },
206 { .format = DRM_FORMAT_NV21, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true },
207 { .format = DRM_FORMAT_NV16, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
208 { .format = DRM_FORMAT_NV61, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
209 { .format = DRM_FORMAT_NV24, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
210 { .format = DRM_FORMAT_NV42, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
211 { .format = DRM_FORMAT_YUYV, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
212 { .format = DRM_FORMAT_YVYU, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
213 { .format = DRM_FORMAT_UYVY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
214 { .format = DRM_FORMAT_VYUY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
215 { .format = DRM_FORMAT_XYUV8888, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
216 { .format = DRM_FORMAT_VUY888, .depth = 0, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
217 { .format = DRM_FORMAT_AYUV, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true },
218 { .format = DRM_FORMAT_Y210, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
219 { .format = DRM_FORMAT_Y212, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
220 { .format = DRM_FORMAT_Y216, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
221 { .format = DRM_FORMAT_Y410, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true },
222 { .format = DRM_FORMAT_Y412, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true },
223 { .format = DRM_FORMAT_Y416, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true },
224 { .format = DRM_FORMAT_XVYU2101010, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
225 { .format = DRM_FORMAT_XVYU12_16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
226 { .format = DRM_FORMAT_XVYU16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
227 { .format = DRM_FORMAT_Y0L0, .depth = 0, .num_planes = 1,
228 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
229 .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true },
230 { .format = DRM_FORMAT_X0L0, .depth = 0, .num_planes = 1,
231 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
232 .hsub = 2, .vsub = 2, .is_yuv = true },
233 { .format = DRM_FORMAT_Y0L2, .depth = 0, .num_planes = 1,
234 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
235 .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true },
236 { .format = DRM_FORMAT_X0L2, .depth = 0, .num_planes = 1,
237 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
238 .hsub = 2, .vsub = 2, .is_yuv = true },
239 { .format = DRM_FORMAT_P010, .depth = 0, .num_planes = 2,
240 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 },
241 .hsub = 2, .vsub = 2, .is_yuv = true},
242 { .format = DRM_FORMAT_P012, .depth = 0, .num_planes = 2,
243 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 },
244 .hsub = 2, .vsub = 2, .is_yuv = true},
245 { .format = DRM_FORMAT_P016, .depth = 0, .num_planes = 2,
246 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 },
247 .hsub = 2, .vsub = 2, .is_yuv = true},
248 { .format = DRM_FORMAT_P210, .depth = 0,
249 .num_planes = 2, .char_per_block = { 2, 4, 0 },
250 .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 }, .hsub = 2,
251 .vsub = 1, .is_yuv = true },
252 { .format = DRM_FORMAT_VUY101010, .depth = 0,
253 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 1, .vsub = 1,
254 .is_yuv = true },
255 { .format = DRM_FORMAT_YUV420_8BIT, .depth = 0,
256 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 2, .vsub = 2,
257 .is_yuv = true },
258 { .format = DRM_FORMAT_YUV420_10BIT, .depth = 0,
259 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 2, .vsub = 2,
260 .is_yuv = true },
261 { .format = DRM_FORMAT_NV15, .depth = 0,
262 .num_planes = 2, .char_per_block = { 5, 5, 0 },
263 .block_w = { 4, 2, 0 }, .block_h = { 1, 1, 0 }, .hsub = 2,
264 .vsub = 2, .is_yuv = true },
265 { .format = DRM_FORMAT_Q410, .depth = 0,
266 .num_planes = 3, .char_per_block = { 2, 2, 2 },
267 .block_w = { 1, 1, 1 }, .block_h = { 1, 1, 1 }, .hsub = 1,
268 .vsub = 1, .is_yuv = true },
269 { .format = DRM_FORMAT_Q401, .depth = 0,
270 .num_planes = 3, .char_per_block = { 2, 2, 2 },
271 .block_w = { 1, 1, 1 }, .block_h = { 1, 1, 1 }, .hsub = 1,
272 .vsub = 1, .is_yuv = true },
273 { .format = DRM_FORMAT_P030, .depth = 0, .num_planes = 2,
274 .char_per_block = { 4, 8, 0 }, .block_w = { 3, 3, 0 }, .block_h = { 1, 1, 0 },
275 .hsub = 2, .vsub = 2, .is_yuv = true},
276 };
277
278 unsigned int i;
279
280 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
281 if (formats[i].format == format)
282 return &formats[i];
283 }
284
285 return NULL;
286 }
287
288 /**
289 * drm_format_info - query information for a given format
290 * @format: pixel format (DRM_FORMAT_*)
291 *
292 * The caller should only pass a supported pixel format to this function.
293 * Unsupported pixel formats will generate a warning in the kernel log.
294 *
295 * Returns:
296 * The instance of struct drm_format_info that describes the pixel format, or
297 * NULL if the format is unsupported.
298 */
drm_format_info(u32 format)299 const struct drm_format_info *drm_format_info(u32 format)
300 {
301 const struct drm_format_info *info;
302
303 info = __drm_format_info(format);
304 WARN_ON(!info);
305 return info;
306 }
307 EXPORT_SYMBOL(drm_format_info);
308
309 /**
310 * drm_get_format_info - query information for a given framebuffer configuration
311 * @dev: DRM device
312 * @mode_cmd: metadata from the userspace fb creation request
313 *
314 * Returns:
315 * The instance of struct drm_format_info that describes the pixel format, or
316 * NULL if the format is unsupported.
317 */
318 const struct drm_format_info *
drm_get_format_info(struct drm_device * dev,const struct drm_mode_fb_cmd2 * mode_cmd)319 drm_get_format_info(struct drm_device *dev,
320 const struct drm_mode_fb_cmd2 *mode_cmd)
321 {
322 const struct drm_format_info *info = NULL;
323
324 if (dev->mode_config.funcs->get_format_info)
325 info = dev->mode_config.funcs->get_format_info(mode_cmd);
326
327 if (!info)
328 info = drm_format_info(mode_cmd->pixel_format);
329
330 return info;
331 }
332 EXPORT_SYMBOL(drm_get_format_info);
333
334 /**
335 * drm_format_info_block_width - width in pixels of block.
336 * @info: pixel format info
337 * @plane: plane index
338 *
339 * Returns:
340 * The width in pixels of a block, depending on the plane index.
341 */
drm_format_info_block_width(const struct drm_format_info * info,int plane)342 unsigned int drm_format_info_block_width(const struct drm_format_info *info,
343 int plane)
344 {
345 if (!info || plane < 0 || plane >= info->num_planes)
346 return 0;
347
348 if (!info->block_w[plane])
349 return 1;
350 return info->block_w[plane];
351 }
352 EXPORT_SYMBOL(drm_format_info_block_width);
353
354 /**
355 * drm_format_info_block_height - height in pixels of a block
356 * @info: pixel format info
357 * @plane: plane index
358 *
359 * Returns:
360 * The height in pixels of a block, depending on the plane index.
361 */
drm_format_info_block_height(const struct drm_format_info * info,int plane)362 unsigned int drm_format_info_block_height(const struct drm_format_info *info,
363 int plane)
364 {
365 if (!info || plane < 0 || plane >= info->num_planes)
366 return 0;
367
368 if (!info->block_h[plane])
369 return 1;
370 return info->block_h[plane];
371 }
372 EXPORT_SYMBOL(drm_format_info_block_height);
373
374 /**
375 * drm_format_info_min_pitch - computes the minimum required pitch in bytes
376 * @info: pixel format info
377 * @plane: plane index
378 * @buffer_width: buffer width in pixels
379 *
380 * Returns:
381 * The minimum required pitch in bytes for a buffer by taking into consideration
382 * the pixel format information and the buffer width.
383 */
drm_format_info_min_pitch(const struct drm_format_info * info,int plane,unsigned int buffer_width)384 uint64_t drm_format_info_min_pitch(const struct drm_format_info *info,
385 int plane, unsigned int buffer_width)
386 {
387 if (!info || plane < 0 || plane >= info->num_planes)
388 return 0;
389
390 return DIV_ROUND_UP_ULL((u64)buffer_width * info->char_per_block[plane],
391 drm_format_info_block_width(info, plane) *
392 drm_format_info_block_height(info, plane));
393 }
394 EXPORT_SYMBOL(drm_format_info_min_pitch);
395