1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Amlogic Meson Video Processing Unit driver
4 *
5 * Copyright (c) 2018 BayLibre, SAS.
6 * Author: Neil Armstrong <narmstrong@baylibre.com>
7 */
8
9 #include <common.h>
10 #include <dm.h>
11 #include <asm/io.h>
12
13 #include "meson_vpu.h"
14
15 /* DMC Registers */
16 #define DMC_CAV_LUT_DATAL 0x48 /* 0x12 offset in data sheet */
17 #define CANVAS_WIDTH_LBIT 29
18 #define CANVAS_WIDTH_LWID 3
19 #define DMC_CAV_LUT_DATAH 0x4c /* 0x13 offset in data sheet */
20 #define CANVAS_WIDTH_HBIT 0
21 #define CANVAS_HEIGHT_BIT 9
22 #define CANVAS_BLKMODE_BIT 24
23 #define DMC_CAV_LUT_ADDR 0x50 /* 0x14 offset in data sheet */
24 #define CANVAS_LUT_WR_EN (0x2 << 8)
25 #define CANVAS_LUT_RD_EN (0x1 << 8)
26
meson_canvas_setup(struct meson_vpu_priv * priv,u32 canvas_index,u32 addr,u32 stride,u32 height,unsigned int wrap,unsigned int blkmode)27 void meson_canvas_setup(struct meson_vpu_priv *priv,
28 u32 canvas_index, u32 addr,
29 u32 stride, u32 height,
30 unsigned int wrap,
31 unsigned int blkmode)
32 {
33 dmc_write(DMC_CAV_LUT_DATAL,
34 (((addr + 7) >> 3)) |
35 (((stride + 7) >> 3) << CANVAS_WIDTH_LBIT));
36
37 dmc_write(DMC_CAV_LUT_DATAH,
38 ((((stride + 7) >> 3) >> CANVAS_WIDTH_LWID) <<
39 CANVAS_WIDTH_HBIT) |
40 (height << CANVAS_HEIGHT_BIT) |
41 (wrap << 22) |
42 (blkmode << CANVAS_BLKMODE_BIT));
43
44 dmc_write(DMC_CAV_LUT_ADDR,
45 CANVAS_LUT_WR_EN | canvas_index);
46
47 /* Force a read-back to make sure everything is flushed. */
48 dmc_read(DMC_CAV_LUT_DATAH);
49 }
50