104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
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* Copyright (C) 2019, 2020 Paul Boddie <paul@boddie.org.uk>
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*
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* Derived from dw_hdmi-imx.c with i.MX portions removed.
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*/
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <drm/bridge/dw_hdmi.h>
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#include <drm/drm_of.h>
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#include <drm/drm_print.h>
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static const struct dw_hdmi_mpll_config ingenic_mpll_cfg[] = {
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{ 45250000, { { 0x01e0, 0x0000 }, { 0x21e1, 0x0000 }, { 0x41e2, 0x0000 } } },
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{ 92500000, { { 0x0140, 0x0005 }, { 0x2141, 0x0005 }, { 0x4142, 0x0005 } } },
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{ 148500000, { { 0x00a0, 0x000a }, { 0x20a1, 0x000a }, { 0x40a2, 0x000a } } },
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{ 216000000, { { 0x00a0, 0x000a }, { 0x2001, 0x000f }, { 0x4002, 0x000f } } },
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{ ~0UL, { { 0x0000, 0x0000 }, { 0x0000, 0x0000 }, { 0x0000, 0x0000 } } }
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};
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static const struct dw_hdmi_curr_ctrl ingenic_cur_ctr[] = {
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/*pixelclk bpp8 bpp10 bpp12 */
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{ 54000000, { 0x091c, 0x091c, 0x06dc } },
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{ 58400000, { 0x091c, 0x06dc, 0x06dc } },
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{ 72000000, { 0x06dc, 0x06dc, 0x091c } },
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{ 74250000, { 0x06dc, 0x0b5c, 0x091c } },
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{ 118800000, { 0x091c, 0x091c, 0x06dc } },
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{ 216000000, { 0x06dc, 0x0b5c, 0x091c } },
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{ ~0UL, { 0x0000, 0x0000, 0x0000 } },
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};
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/*
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* Resistance term 133Ohm Cfg
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* PREEMP config 0.00
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* TX/CK level 10
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*/
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static const struct dw_hdmi_phy_config ingenic_phy_config[] = {
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/*pixelclk symbol term vlev */
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{ 216000000, 0x800d, 0x0005, 0x01ad},
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{ ~0UL, 0x0000, 0x0000, 0x0000}
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};
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static enum drm_mode_status
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ingenic_dw_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data,
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const struct drm_display_info *info,
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const struct drm_display_mode *mode)
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{
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if (mode->clock < 13500)
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return MODE_CLOCK_LOW;
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/* FIXME: Hardware is capable of 270MHz, but setup data is missing. */
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if (mode->clock > 216000)
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return MODE_CLOCK_HIGH;
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return MODE_OK;
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}
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static struct dw_hdmi_plat_data ingenic_dw_hdmi_plat_data = {
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.mpll_cfg = ingenic_mpll_cfg,
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.cur_ctr = ingenic_cur_ctr,
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.phy_config = ingenic_phy_config,
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.mode_valid = ingenic_dw_hdmi_mode_valid,
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.output_port = 1,
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};
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static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = {
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{ .compatible = "ingenic,jz4780-dw-hdmi" },
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{ /* Sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids);
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static void ingenic_dw_hdmi_cleanup(void *data)
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{
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struct dw_hdmi *hdmi = (struct dw_hdmi *)data;
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dw_hdmi_remove(hdmi);
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}
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static int ingenic_dw_hdmi_probe(struct platform_device *pdev)
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{
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struct dw_hdmi *hdmi;
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hdmi = dw_hdmi_probe(pdev, &ingenic_dw_hdmi_plat_data);
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if (IS_ERR(hdmi))
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return PTR_ERR(hdmi);
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return devm_add_action_or_reset(&pdev->dev, ingenic_dw_hdmi_cleanup, hdmi);
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}
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static struct platform_driver ingenic_dw_hdmi_driver = {
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.probe = ingenic_dw_hdmi_probe,
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.driver = {
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.name = "dw-hdmi-ingenic",
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.of_match_table = ingenic_dw_hdmi_dt_ids,
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},
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};
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module_platform_driver(ingenic_dw_hdmi_driver);
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MODULE_DESCRIPTION("JZ4780 Specific DW-HDMI Driver Extension");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:dw-hdmi-ingenic");
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