1// SPDX-License-Identifier: GPL-2.0
2/*
3 * TI j721e Cadence DSI wrapper
4 *
5 * Copyright (C) 2022 Texas Instruments Incorporated - http://www.ti.com/
6 * Author: Rahul T R <r-ravikumar@ti.com>
7 */
8
9#include <linux/io.h>
10#include <linux/platform_device.h>
11
12#include "cdns-dsi-j721e.h"
13
14#define DSI_WRAP_REVISION		0x0
15#define DSI_WRAP_DPI_CONTROL		0x4
16#define DSI_WRAP_DSC_CONTROL		0x8
17#define DSI_WRAP_DPI_SECURE		0xc
18#define DSI_WRAP_DSI_0_ASF_STATUS	0x10
19
20#define DSI_WRAP_DPI_0_EN		BIT(0)
21#define DSI_WRAP_DSI2_MUX_SEL		BIT(4)
22
23static int cdns_dsi_j721e_init(struct cdns_dsi *dsi)
24{
25	struct platform_device *pdev = to_platform_device(dsi->base.dev);
26
27	dsi->j721e_regs = devm_platform_ioremap_resource(pdev, 1);
28	return PTR_ERR_OR_ZERO(dsi->j721e_regs);
29}
30
31static void cdns_dsi_j721e_enable(struct cdns_dsi *dsi)
32{
33	/*
34	 * Enable DPI0 as its input. DSS0 DPI2 is connected
35	 * to DSI DPI0. This is the only supported configuration on
36	 * J721E.
37	 */
38	writel(DSI_WRAP_DPI_0_EN, dsi->j721e_regs + DSI_WRAP_DPI_CONTROL);
39}
40
41static void cdns_dsi_j721e_disable(struct cdns_dsi *dsi)
42{
43	/* Put everything to defaults  */
44	writel(0, dsi->j721e_regs + DSI_WRAP_DPI_CONTROL);
45}
46
47const struct cdns_dsi_platform_ops dsi_ti_j721e_ops = {
48	.init = cdns_dsi_j721e_init,
49	.enable = cdns_dsi_j721e_enable,
50	.disable = cdns_dsi_j721e_disable,
51};
52