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 cdns_mhdp_j721e_init(struct cdns_mhdp_device * mhdp)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 cdns_mhdp_j721e_enable(struct cdns_mhdp_device * mhdp)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 cdns_mhdp_j721e_disable(struct cdns_mhdp_device * mhdp)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 68 const 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 74 const u32 75 mhdp_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; 78