1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2024, The Linux Foundation. All rights reserved. 4 */ 5 6 #ifndef _DP_UTILS_H_ 7 #define _DP_UTILS_H_ 8 9 #include <linux/bitfield.h> 10 #include <linux/bits.h> 11 #include <drm/display/drm_dp_helper.h> 12 13 #define HEADER_BYTE_0_BIT 0 14 #define PARITY_BYTE_0_BIT 8 15 #define HEADER_BYTE_1_BIT 16 16 #define PARITY_BYTE_1_BIT 24 17 #define HEADER_BYTE_2_BIT 0 18 #define PARITY_BYTE_2_BIT 8 19 #define HEADER_BYTE_3_BIT 16 20 #define PARITY_BYTE_3_BIT 24 21 22 #define HEADER_0_MASK GENMASK(7, 0) 23 #define PARITY_0_MASK GENMASK(15, 8) 24 #define HEADER_1_MASK GENMASK(23, 16) 25 #define PARITY_1_MASK GENMASK(31, 24) 26 #define HEADER_2_MASK GENMASK(7, 0) 27 #define PARITY_2_MASK GENMASK(15, 8) 28 #define HEADER_3_MASK GENMASK(23, 16) 29 #define PARITY_3_MASK GENMASK(31, 24) 30 31 u8 dp_utils_get_g0_value(u8 data); 32 u8 dp_utils_get_g1_value(u8 data); 33 u8 dp_utils_calculate_parity(u32 data); 34 ssize_t dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 *header_buff); 35 36 #endif /* _DP_UTILS_H_ */ 37