1 /* 2 * Copyright (c) 2016 Intel Corporation 3 * 4 * Permission to use, copy, modify, distribute, and sell this software and its 5 * documentation for any purpose is hereby granted without fee, provided that 6 * the above copyright notice appear in all copies and that both that copyright 7 * notice and this permission notice appear in supporting documentation, and 8 * that the name of the copyright holders not be used in advertising or 9 * publicity pertaining to distribution of the software without specific, 10 * written prior permission. The copyright holders make no representations 11 * about the suitability of this software for any purpose. It is provided "as 12 * is" without express or implied warranty. 13 * 14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 20 * OF THIS SOFTWARE. 21 */ 22 23 #ifndef __DRM_COLOR_MGMT_H__ 24 #define __DRM_COLOR_MGMT_H__ 25 26 #include <linux/ctype.h> 27 #include <drm/drm_property.h> 28 29 struct drm_crtc; 30 struct drm_plane; 31 32 uint32_t drm_color_lut_extract(uint32_t user_input, uint32_t bit_precision); 33 u64 drm_color_ctm_s31_32_to_qm_n(u64 user_input, u32 m, u32 n); 34 35 void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, 36 uint degamma_lut_size, 37 bool has_ctm, 38 uint gamma_lut_size); 39 40 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 41 int gamma_size); 42 43 /** 44 * drm_color_lut_size - calculate the number of entries in the LUT 45 * @blob: blob containing the LUT 46 * 47 * Returns: 48 * The number of entries in the color LUT stored in @blob. 49 */ 50 static inline int drm_color_lut_size(const struct drm_property_blob *blob) 51 { 52 return blob->length / sizeof(struct drm_color_lut); 53 } 54 55 enum drm_color_encoding { 56 DRM_COLOR_YCBCR_BT601, 57 DRM_COLOR_YCBCR_BT709, 58 DRM_COLOR_YCBCR_BT2020, 59 DRM_COLOR_ENCODING_MAX, 60 }; 61 62 enum drm_color_range { 63 DRM_COLOR_YCBCR_LIMITED_RANGE, 64 DRM_COLOR_YCBCR_FULL_RANGE, 65 DRM_COLOR_RANGE_MAX, 66 }; 67 68 int drm_plane_create_color_properties(struct drm_plane *plane, 69 u32 supported_encodings, 70 u32 supported_ranges, 71 enum drm_color_encoding default_encoding, 72 enum drm_color_range default_range); 73 74 /** 75 * enum drm_color_lut_tests - hw-specific LUT tests to perform 76 * 77 * The drm_color_lut_check() function takes a bitmask of the values here to 78 * determine which tests to apply to a userspace-provided LUT. 79 */ 80 enum drm_color_lut_tests { 81 /** 82 * @DRM_COLOR_LUT_EQUAL_CHANNELS: 83 * 84 * Checks whether the entries of a LUT all have equal values for the 85 * red, green, and blue channels. Intended for hardware that only 86 * accepts a single value per LUT entry and assumes that value applies 87 * to all three color components. 88 */ 89 DRM_COLOR_LUT_EQUAL_CHANNELS = BIT(0), 90 91 /** 92 * @DRM_COLOR_LUT_NON_DECREASING: 93 * 94 * Checks whether the entries of a LUT are always flat or increasing 95 * (never decreasing). 96 */ 97 DRM_COLOR_LUT_NON_DECREASING = BIT(1), 98 }; 99 100 int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests); 101 #endif 102