| Neil Armstrong | bbbe775 | 2016-11-10 15:29:37 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 BayLibre, SAS |
| 3 | * Author: Neil Armstrong <narmstrong@baylibre.com> |
| 4 | * Copyright (C) 2015 Amlogic, Inc. All rights reserved. |
| 5 | * Copyright (C) 2014 Endless Mobile |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License as |
| 9 | * published by the Free Software Foundation; either version 2 of the |
| 10 | * License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, but |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/module.h> |
| 23 | #include "meson_drv.h" |
| 24 | #include "meson_canvas.h" |
| 25 | #include "meson_registers.h" |
| 26 | |
| 27 | /* |
| 28 | * CANVAS is a memory zone where physical memory frames information |
| 29 | * are stored for the VIU to scanout. |
| 30 | */ |
| 31 | |
| 32 | /* DMC Registers */ |
| 33 | #define DMC_CAV_LUT_DATAL 0x48 /* 0x12 offset in data sheet */ |
| 34 | #define CANVAS_WIDTH_LBIT 29 |
| 35 | #define CANVAS_WIDTH_LWID 3 |
| 36 | #define DMC_CAV_LUT_DATAH 0x4c /* 0x13 offset in data sheet */ |
| 37 | #define CANVAS_WIDTH_HBIT 0 |
| 38 | #define CANVAS_HEIGHT_BIT 9 |
| 39 | #define CANVAS_BLKMODE_BIT 24 |
| 40 | #define DMC_CAV_LUT_ADDR 0x50 /* 0x14 offset in data sheet */ |
| 41 | #define CANVAS_LUT_WR_EN (0x2 << 8) |
| 42 | #define CANVAS_LUT_RD_EN (0x1 << 8) |
| 43 | |
| 44 | void meson_canvas_setup(struct meson_drm *priv, |
| 45 | uint32_t canvas_index, uint32_t addr, |
| 46 | uint32_t stride, uint32_t height, |
| 47 | unsigned int wrap, |
| 48 | unsigned int blkmode) |
| 49 | { |
| 50 | unsigned int val; |
| 51 | |
| 52 | regmap_write(priv->dmc, DMC_CAV_LUT_DATAL, |
| 53 | (((addr + 7) >> 3)) | |
| 54 | (((stride + 7) >> 3) << CANVAS_WIDTH_LBIT)); |
| 55 | |
| 56 | regmap_write(priv->dmc, DMC_CAV_LUT_DATAH, |
| 57 | ((((stride + 7) >> 3) >> CANVAS_WIDTH_LWID) << |
| 58 | CANVAS_WIDTH_HBIT) | |
| 59 | (height << CANVAS_HEIGHT_BIT) | |
| 60 | (wrap << 22) | |
| 61 | (blkmode << CANVAS_BLKMODE_BIT)); |
| 62 | |
| 63 | regmap_write(priv->dmc, DMC_CAV_LUT_ADDR, |
| 64 | CANVAS_LUT_WR_EN | canvas_index); |
| 65 | |
| 66 | /* Force a read-back to make sure everything is flushed. */ |
| 67 | regmap_read(priv->dmc, DMC_CAV_LUT_DATAH, &val); |
| 68 | } |