52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* TI j721e Cadence DSI wrapper
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*
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* Copyright (C) 2022 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Rahul T R <r-ravikumar@ti.com>
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*/
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include "cdns-dsi-j721e.h"
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#define DSI_WRAP_REVISION 0x0
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#define DSI_WRAP_DPI_CONTROL 0x4
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#define DSI_WRAP_DSC_CONTROL 0x8
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#define DSI_WRAP_DPI_SECURE 0xc
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#define DSI_WRAP_DSI_0_ASF_STATUS 0x10
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#define DSI_WRAP_DPI_0_EN BIT(0)
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#define DSI_WRAP_DSI2_MUX_SEL BIT(4)
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static int cdns_dsi_j721e_init(struct cdns_dsi *dsi)
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{
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struct platform_device *pdev = to_platform_device(dsi->base.dev);
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dsi->j721e_regs = devm_platform_ioremap_resource(pdev, 1);
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return PTR_ERR_OR_ZERO(dsi->j721e_regs);
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}
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static void cdns_dsi_j721e_enable(struct cdns_dsi *dsi)
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{
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/*
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* Enable DPI0 as its input. DSS0 DPI2 is connected
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* to DSI DPI0. This is the only supported configuration on
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* J721E.
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*/
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writel(DSI_WRAP_DPI_0_EN, dsi->j721e_regs + DSI_WRAP_DPI_CONTROL);
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}
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static void cdns_dsi_j721e_disable(struct cdns_dsi *dsi)
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{
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/* Put everything to defaults */
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writel(0, dsi->j721e_regs + DSI_WRAP_DPI_CONTROL);
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}
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const struct cdns_dsi_platform_ops dsi_ti_j721e_ops = {
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.init = cdns_dsi_j721e_init,
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.enable = cdns_dsi_j721e_enable,
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.disable = cdns_dsi_j721e_disable,
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};
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