u-boot/drivers/video/meson/meson_canvas.c
Neil Armstrong 3bed422094 video: Add Meson Video Processing Unit Driver
This adds video output support for Amlogic GXBB/GXL/GXM chips.
The supported ports are CVBS and HDMI (based on DW_HDMI).

When using HDMI, only DMT modes are supported.

There is support for simple-framebuffer (CONFIG_VIDEO_DT_SIMPLEFB)

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jorge Ramire-Ortiz <jramirez@baylibre.com>
Signed-off-by: Maxime Jourdan <mjourdan@baylibre.com>
[narmstrong: fixed defines alignment in meson_canvas.c]
Reviewed-by: Anatolij Gustschin <agust@denx.de>
2019-01-31 09:35:01 +01:00

45 lines
1.2 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Amlogic Meson Video Processing Unit driver
*
* Copyright (c) 2018 BayLibre, SAS.
* Author: Neil Armstrong <narmstrong@baylibre.com>
*/
#include "meson_vpu.h"
/* DMC Registers */
#define DMC_CAV_LUT_DATAL 0x48 /* 0x12 offset in data sheet */
#define CANVAS_WIDTH_LBIT 29
#define CANVAS_WIDTH_LWID 3
#define DMC_CAV_LUT_DATAH 0x4c /* 0x13 offset in data sheet */
#define CANVAS_WIDTH_HBIT 0
#define CANVAS_HEIGHT_BIT 9
#define CANVAS_BLKMODE_BIT 24
#define DMC_CAV_LUT_ADDR 0x50 /* 0x14 offset in data sheet */
#define CANVAS_LUT_WR_EN (0x2 << 8)
#define CANVAS_LUT_RD_EN (0x1 << 8)
void meson_canvas_setup(struct meson_vpu_priv *priv,
u32 canvas_index, u32 addr,
u32 stride, u32 height,
unsigned int wrap,
unsigned int blkmode)
{
dmc_write(DMC_CAV_LUT_DATAL,
(((addr + 7) >> 3)) |
(((stride + 7) >> 3) << CANVAS_WIDTH_LBIT));
dmc_write(DMC_CAV_LUT_DATAH,
((((stride + 7) >> 3) >> CANVAS_WIDTH_LWID) <<
CANVAS_WIDTH_HBIT) |
(height << CANVAS_HEIGHT_BIT) |
(wrap << 22) |
(blkmode << CANVAS_BLKMODE_BIT));
dmc_write(DMC_CAV_LUT_ADDR,
CANVAS_LUT_WR_EN | canvas_index);
/* Force a read-back to make sure everything is flushed. */
dmc_read(DMC_CAV_LUT_DATAH);
}