diff options
Diffstat (limited to 'drivers/gpu/drm/msm/dp/dp_utils.h')
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_utils.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_utils.h b/drivers/gpu/drm/msm/dp/dp_utils.h new file mode 100644 index 0000000000000..7c056d9798dc3 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_utils.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2024, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_UTILS_H_ +#define _DP_UTILS_H_ + +#include <linux/bitfield.h> +#include <linux/bits.h> +#include <drm/display/drm_dp_helper.h> + +#define HEADER_BYTE_0_BIT 0 +#define PARITY_BYTE_0_BIT 8 +#define HEADER_BYTE_1_BIT 16 +#define PARITY_BYTE_1_BIT 24 +#define HEADER_BYTE_2_BIT 0 +#define PARITY_BYTE_2_BIT 8 +#define HEADER_BYTE_3_BIT 16 +#define PARITY_BYTE_3_BIT 24 + +#define HEADER_0_MASK GENMASK(7, 0) +#define PARITY_0_MASK GENMASK(15, 8) +#define HEADER_1_MASK GENMASK(23, 16) +#define PARITY_1_MASK GENMASK(31, 24) +#define HEADER_2_MASK GENMASK(7, 0) +#define PARITY_2_MASK GENMASK(15, 8) +#define HEADER_3_MASK GENMASK(23, 16) +#define PARITY_3_MASK GENMASK(31, 24) + +u8 dp_utils_get_g0_value(u8 data); +u8 dp_utils_get_g1_value(u8 data); +u8 dp_utils_calculate_parity(u32 data); +ssize_t dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 *header_buff); + +#endif /* _DP_UTILS_H_ */ |