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