1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * TI j721e Cadence MHDP8546 DP wrapper
 4 *
 5 * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
 6 * Author: Jyri Sarha <jsarha@ti.com>
 7 */
 8
 9#include <linux/io.h>
10#include <linux/platform_device.h>
11
12#include "cdns-mhdp8546-j721e.h"
13
14#define	REVISION			0x00
15#define	DPTX_IPCFG			0x04
16#define	ECC_MEM_CFG			0x08
17#define	DPTX_DSC_CFG			0x0c
18#define	DPTX_SRC_CFG			0x10
19#define	DPTX_VIF_SECURE_MODE_CFG	0x14
20#define	DPTX_VIF_CONN_STATUS		0x18
21#define	PHY_CLK_STATUS			0x1c
22
23#define DPTX_SRC_AIF_EN			BIT(16)
24#define DPTX_SRC_VIF_3_IN30B		BIT(11)
25#define DPTX_SRC_VIF_2_IN30B		BIT(10)
26#define DPTX_SRC_VIF_1_IN30B		BIT(9)
27#define DPTX_SRC_VIF_0_IN30B		BIT(8)
28#define DPTX_SRC_VIF_3_SEL_DPI5		BIT(7)
29#define DPTX_SRC_VIF_3_SEL_DPI3		0
30#define DPTX_SRC_VIF_2_SEL_DPI4		BIT(6)
31#define DPTX_SRC_VIF_2_SEL_DPI2		0
32#define DPTX_SRC_VIF_1_SEL_DPI3		BIT(5)
33#define DPTX_SRC_VIF_1_SEL_DPI1		0
34#define DPTX_SRC_VIF_0_SEL_DPI2		BIT(4)
35#define DPTX_SRC_VIF_0_SEL_DPI0		0
36#define DPTX_SRC_VIF_3_EN		BIT(3)
37#define DPTX_SRC_VIF_2_EN		BIT(2)
38#define DPTX_SRC_VIF_1_EN		BIT(1)
39#define DPTX_SRC_VIF_0_EN		BIT(0)
40
41/* TODO turn DPTX_IPCFG fw_mem_clk_en at pm_runtime_suspend. */
42
43static int cdns_mhdp_j721e_init(struct cdns_mhdp_device *mhdp)
44{
45	struct platform_device *pdev = to_platform_device(mhdp->dev);
46
47	mhdp->j721e_regs = devm_platform_ioremap_resource(pdev, 1);
48	return PTR_ERR_OR_ZERO(mhdp->j721e_regs);
49}
50
51static void cdns_mhdp_j721e_enable(struct cdns_mhdp_device *mhdp)
52{
53	/*
54	 * Enable VIF_0 and select DPI2 as its input. DSS0 DPI0 is connected
55	 * to eDP DPI2. This is the only supported SST configuration on
56	 * J721E.
57	 */
58	writel(DPTX_SRC_VIF_0_EN | DPTX_SRC_VIF_0_SEL_DPI2,
59	       mhdp->j721e_regs + DPTX_SRC_CFG);
60}
61
62static void cdns_mhdp_j721e_disable(struct cdns_mhdp_device *mhdp)
63{
64	/* Put everything to defaults  */
65	writel(0, mhdp->j721e_regs + DPTX_DSC_CFG);
66}
67
68const struct mhdp_platform_ops mhdp_ti_j721e_ops = {
69	.init = cdns_mhdp_j721e_init,
70	.enable = cdns_mhdp_j721e_enable,
71	.disable = cdns_mhdp_j721e_disable,
72};
73
74const u32
75mhdp_ti_j721e_bridge_input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
76				       DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
77				       DRM_BUS_FLAG_DE_HIGH;