summaryrefslogtreecommitdiff
path: root/include/drm/drm_color_mgmt.h
blob: d1c662d92ab7118b661a42cd78fe392a78d33f0c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
/*
 * Copyright (c) 2016 Intel Corporation
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

#ifndef __DRM_COLOR_MGMT_H__
#define __DRM_COLOR_MGMT_H__

#include <linux/ctype.h>
#include <drm/drm_property.h>

struct drm_crtc;
struct drm_plane;

uint32_t drm_color_lut_extract(uint32_t user_input, uint32_t bit_precision);

void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc,
				uint degamma_lut_size,
				bool has_ctm,
				uint gamma_lut_size);

int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
				 int gamma_size);

/**
 * drm_color_lut_size - calculate the number of entries in the LUT
 * @blob: blob containing the LUT
 *
 * Returns:
 * The number of entries in the color LUT stored in @blob.
 */
static inline int drm_color_lut_size(const struct drm_property_blob *blob)
{
	return blob->length / sizeof(struct drm_color_lut);
}

enum drm_color_encoding {
	DRM_COLOR_YCBCR_BT601,
	DRM_COLOR_YCBCR_BT709,
	DRM_COLOR_YCBCR_BT2020,
	DRM_COLOR_ENCODING_MAX,
};

enum drm_color_range {
	DRM_COLOR_YCBCR_LIMITED_RANGE,
	DRM_COLOR_YCBCR_FULL_RANGE,
	DRM_COLOR_RANGE_MAX,
};

int drm_plane_create_color_properties(struct drm_plane *plane,
				      u32 supported_encodings,
				      u32 supported_ranges,
				      enum drm_color_encoding default_encoding,
				      enum drm_color_range default_range);

/**
 * enum drm_color_lut_tests - hw-specific LUT tests to perform
 *
 * The drm_color_lut_check() function takes a bitmask of the values here to
 * determine which tests to apply to a userspace-provided LUT.
 */
enum drm_color_lut_tests {
	/**
	 * @DRM_COLOR_LUT_EQUAL_CHANNELS:
	 *
	 * Checks whether the entries of a LUT all have equal values for the
	 * red, green, and blue channels.  Intended for hardware that only
	 * accepts a single value per LUT entry and assumes that value applies
	 * to all three color components.
	 */
	DRM_COLOR_LUT_EQUAL_CHANNELS = BIT(0),

	/**
	 * @DRM_COLOR_LUT_NON_DECREASING:
	 *
	 * Checks whether the entries of a LUT are always flat or increasing
	 * (never decreasing).
	 */
	DRM_COLOR_LUT_NON_DECREASING = BIT(1),
};

int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests);
#endif