cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ingenic-dw-hdmi.c (3079B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
      3 * Copyright (C) 2019, 2020 Paul Boddie <paul@boddie.org.uk>
      4 *
      5 * Derived from dw_hdmi-imx.c with i.MX portions removed.
      6 */
      7
      8#include <linux/module.h>
      9#include <linux/of_platform.h>
     10#include <linux/platform_device.h>
     11
     12#include <drm/bridge/dw_hdmi.h>
     13#include <drm/drm_of.h>
     14#include <drm/drm_print.h>
     15
     16static const struct dw_hdmi_mpll_config ingenic_mpll_cfg[] = {
     17	{ 45250000,  { { 0x01e0, 0x0000 }, { 0x21e1, 0x0000 }, { 0x41e2, 0x0000 } } },
     18	{ 92500000,  { { 0x0140, 0x0005 }, { 0x2141, 0x0005 }, { 0x4142, 0x0005 } } },
     19	{ 148500000, { { 0x00a0, 0x000a }, { 0x20a1, 0x000a }, { 0x40a2, 0x000a } } },
     20	{ 216000000, { { 0x00a0, 0x000a }, { 0x2001, 0x000f }, { 0x4002, 0x000f } } },
     21	{ ~0UL,      { { 0x0000, 0x0000 }, { 0x0000, 0x0000 }, { 0x0000, 0x0000 } } }
     22};
     23
     24static const struct dw_hdmi_curr_ctrl ingenic_cur_ctr[] = {
     25	/*pixelclk     bpp8    bpp10   bpp12 */
     26	{ 54000000,  { 0x091c, 0x091c, 0x06dc } },
     27	{ 58400000,  { 0x091c, 0x06dc, 0x06dc } },
     28	{ 72000000,  { 0x06dc, 0x06dc, 0x091c } },
     29	{ 74250000,  { 0x06dc, 0x0b5c, 0x091c } },
     30	{ 118800000, { 0x091c, 0x091c, 0x06dc } },
     31	{ 216000000, { 0x06dc, 0x0b5c, 0x091c } },
     32	{ ~0UL,      { 0x0000, 0x0000, 0x0000 } },
     33};
     34
     35/*
     36 * Resistance term 133Ohm Cfg
     37 * PREEMP config 0.00
     38 * TX/CK level 10
     39 */
     40static const struct dw_hdmi_phy_config ingenic_phy_config[] = {
     41	/*pixelclk   symbol   term   vlev */
     42	{ 216000000, 0x800d, 0x0005, 0x01ad},
     43	{ ~0UL,      0x0000, 0x0000, 0x0000}
     44};
     45
     46static enum drm_mode_status
     47ingenic_dw_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data,
     48			   const struct drm_display_info *info,
     49			   const struct drm_display_mode *mode)
     50{
     51	if (mode->clock < 13500)
     52		return MODE_CLOCK_LOW;
     53	/* FIXME: Hardware is capable of 270MHz, but setup data is missing. */
     54	if (mode->clock > 216000)
     55		return MODE_CLOCK_HIGH;
     56
     57	return MODE_OK;
     58}
     59
     60static struct dw_hdmi_plat_data ingenic_dw_hdmi_plat_data = {
     61	.mpll_cfg   = ingenic_mpll_cfg,
     62	.cur_ctr    = ingenic_cur_ctr,
     63	.phy_config = ingenic_phy_config,
     64	.mode_valid = ingenic_dw_hdmi_mode_valid,
     65	.output_port	= 1,
     66};
     67
     68static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = {
     69	{ .compatible = "ingenic,jz4780-dw-hdmi" },
     70	{ /* Sentinel */ },
     71};
     72MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids);
     73
     74static void ingenic_dw_hdmi_cleanup(void *data)
     75{
     76	struct dw_hdmi *hdmi = (struct dw_hdmi *)data;
     77
     78	dw_hdmi_remove(hdmi);
     79}
     80
     81static int ingenic_dw_hdmi_probe(struct platform_device *pdev)
     82{
     83	struct dw_hdmi *hdmi;
     84
     85	hdmi = dw_hdmi_probe(pdev, &ingenic_dw_hdmi_plat_data);
     86	if (IS_ERR(hdmi))
     87		return PTR_ERR(hdmi);
     88
     89	return devm_add_action_or_reset(&pdev->dev, ingenic_dw_hdmi_cleanup, hdmi);
     90}
     91
     92static struct platform_driver ingenic_dw_hdmi_driver = {
     93	.probe  = ingenic_dw_hdmi_probe,
     94	.driver = {
     95		.name = "dw-hdmi-ingenic",
     96		.of_match_table = ingenic_dw_hdmi_dt_ids,
     97	},
     98};
     99module_platform_driver(ingenic_dw_hdmi_driver);
    100
    101MODULE_DESCRIPTION("JZ4780 Specific DW-HDMI Driver Extension");
    102MODULE_LICENSE("GPL v2");
    103MODULE_ALIAS("platform:dw-hdmi-ingenic");