| 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
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| 2 | /* |
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| 3 | * Copyright (C) 2018 BayLibre, SAS |
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| 4 | */ |
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| 5 | #ifndef __SOC_MESON_CANVAS_H |
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| 6 | #define __SOC_MESON_CANVAS_H |
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| 7 | |
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| 8 | #include <linux/kernel.h> |
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| 9 | |
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| 10 | #define MESON_CANVAS_WRAP_NONE 0x00 |
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| 11 | #define MESON_CANVAS_WRAP_X 0x01 |
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| 12 | #define MESON_CANVAS_WRAP_Y 0x02 |
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| 13 | |
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| 14 | #define MESON_CANVAS_BLKMODE_LINEAR 0x00 |
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| 15 | #define MESON_CANVAS_BLKMODE_32x32 0x01 |
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| 16 | #define MESON_CANVAS_BLKMODE_64x64 0x02 |
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| 17 | |
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| 18 | #define MESON_CANVAS_ENDIAN_SWAP16 0x1 |
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| 19 | #define MESON_CANVAS_ENDIAN_SWAP32 0x3 |
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| 20 | #define MESON_CANVAS_ENDIAN_SWAP64 0x7 |
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| 21 | #define MESON_CANVAS_ENDIAN_SWAP128 0xf |
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| 22 | |
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| 23 | struct device; |
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| 24 | struct meson_canvas; |
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| 25 | |
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| 26 | /** |
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| 27 | * meson_canvas_get() - get a canvas provider instance |
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| 28 | * |
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| 29 | * @dev: consumer device pointer |
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| 30 | */ |
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| 31 | struct meson_canvas *meson_canvas_get(struct device *dev); |
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| 32 | |
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| 33 | /** |
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| 34 | * meson_canvas_alloc() - take ownership of a canvas |
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| 35 | * |
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| 36 | * @canvas: canvas provider instance retrieved from meson_canvas_get() |
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| 37 | * @canvas_index: will be filled with the canvas ID |
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| 38 | */ |
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| 39 | int meson_canvas_alloc(struct meson_canvas *canvas, u8 *canvas_index); |
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| 40 | |
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| 41 | /** |
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| 42 | * meson_canvas_free() - remove ownership from a canvas |
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| 43 | * |
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| 44 | * @canvas: canvas provider instance retrieved from meson_canvas_get() |
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| 45 | * @canvas_index: canvas ID that was obtained via meson_canvas_alloc() |
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| 46 | */ |
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| 47 | int meson_canvas_free(struct meson_canvas *canvas, u8 canvas_index); |
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| 48 | |
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| 49 | /** |
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| 50 | * meson_canvas_config() - configure a canvas |
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| 51 | * |
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| 52 | * @canvas: canvas provider instance retrieved from meson_canvas_get() |
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| 53 | * @canvas_index: canvas ID that was obtained via meson_canvas_alloc() |
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| 54 | * @addr: physical address to the pixel buffer |
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| 55 | * @stride: width of the buffer |
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| 56 | * @height: height of the buffer |
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| 57 | * @wrap: undocumented |
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| 58 | * @blkmode: block mode (linear, 32x32, 64x64) |
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| 59 | * @endian: byte swapping (swap16, swap32, swap64, swap128) |
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| 60 | */ |
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| 61 | int meson_canvas_config(struct meson_canvas *canvas, u8 canvas_index, |
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| 62 | u32 addr, u32 stride, u32 height, |
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| 63 | unsigned int wrap, unsigned int blkmode, |
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| 64 | unsigned int endian); |
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| 65 | |
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| 66 | #endif |
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| 67 | |
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