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 16 static 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 24 static 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 */ 40 static 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 46 static enum drm_mode_status 47 ingenic_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 60 static 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 68 static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = { 69 { .compatible = "ingenic,jz4780-dw-hdmi" }, 70 { /* Sentinel */ }, 71 }; 72 MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids); 73 74 static 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 81 static 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 92 static 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 }; 99 module_platform_driver(ingenic_dw_hdmi_driver); 100 101 MODULE_DESCRIPTION("JZ4780 Specific DW-HDMI Driver Extension"); 102 MODULE_LICENSE("GPL v2"); 103 MODULE_ALIAS("platform:dw-hdmi-ingenic"); 104