1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * HDMI PLL 4 * 5 * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com/ 6 */ 7 8 #define DSS_SUBSYS_NAME "HDMIPLL" 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/err.h> 13 #include <linux/io.h> 14 #include <linux/platform_device.h> 15 #include <linux/clk.h> 16 #include <linux/seq_file.h> 17 #include <linux/pm_runtime.h> 18 19 #include "omapdss.h" 20 #include "dss.h" 21 #include "hdmi.h" 22 23 void hdmi_pll_dump(struct hdmi_pll_data *pll, struct seq_file *s) 24 { 25 #define DUMPPLL(r) seq_printf(s, "%-35s %08x\n", #r,\ 26 hdmi_read_reg(pll->base, r)) 27 28 DUMPPLL(PLLCTRL_PLL_CONTROL); 29 DUMPPLL(PLLCTRL_PLL_STATUS); 30 DUMPPLL(PLLCTRL_PLL_GO); 31 DUMPPLL(PLLCTRL_CFG1); 32 DUMPPLL(PLLCTRL_CFG2); 33 DUMPPLL(PLLCTRL_CFG3); 34 DUMPPLL(PLLCTRL_SSC_CFG1); 35 DUMPPLL(PLLCTRL_SSC_CFG2); 36 DUMPPLL(PLLCTRL_CFG4); 37 } 38 39 static int hdmi_pll_enable(struct dss_pll *dsspll) 40 { 41 struct hdmi_pll_data *pll = container_of(dsspll, struct hdmi_pll_data, pll); 42 struct hdmi_wp_data *wp = pll->wp; 43 int r; 44 45 r = pm_runtime_get_sync(&pll->pdev->dev); 46 WARN_ON(r < 0); 47 48 dss_ctrl_pll_enable(dsspll, true); 49 50 r = hdmi_wp_set_pll_pwr(wp, HDMI_PLLPWRCMD_BOTHON_ALLCLKS); 51 if (r) 52 return r; 53 54 return 0; 55 } 56 57 static void hdmi_pll_disable(struct dss_pll *dsspll) 58 { 59 struct hdmi_pll_data *pll = container_of(dsspll, struct hdmi_pll_data, pll); 60 struct hdmi_wp_data *wp = pll->wp; 61 int r; 62 63 hdmi_wp_set_pll_pwr(wp, HDMI_PLLPWRCMD_ALLOFF); 64 65 dss_ctrl_pll_enable(dsspll, false); 66 67 r = pm_runtime_put_sync(&pll->pdev->dev); 68 WARN_ON(r < 0 && r != -ENOSYS); 69 } 70 71 static const struct dss_pll_ops hdmi_pll_ops = { 72 .enable = hdmi_pll_enable, 73 .disable = hdmi_pll_disable, 74 .set_config = dss_pll_write_config_type_b, 75 }; 76 77 static const struct dss_pll_hw dss_omap4_hdmi_pll_hw = { 78 .type = DSS_PLL_TYPE_B, 79 80 .n_max = 255, 81 .m_min = 20, 82 .m_max = 4095, 83 .mX_max = 127, 84 .fint_min = 500000, 85 .fint_max = 2500000, 86 87 .clkdco_min = 500000000, 88 .clkdco_low = 1000000000, 89 .clkdco_max = 2000000000, 90 91 .n_msb = 8, 92 .n_lsb = 1, 93 .m_msb = 20, 94 .m_lsb = 9, 95 96 .mX_msb[0] = 24, 97 .mX_lsb[0] = 18, 98 99 .has_selfreqdco = true, 100 }; 101 102 static const struct dss_pll_hw dss_omap5_hdmi_pll_hw = { 103 .type = DSS_PLL_TYPE_B, 104 105 .n_max = 255, 106 .m_min = 20, 107 .m_max = 2045, 108 .mX_max = 127, 109 .fint_min = 620000, 110 .fint_max = 2500000, 111 112 .clkdco_min = 750000000, 113 .clkdco_low = 1500000000, 114 .clkdco_max = 2500000000UL, 115 116 .n_msb = 8, 117 .n_lsb = 1, 118 .m_msb = 20, 119 .m_lsb = 9, 120 121 .mX_msb[0] = 24, 122 .mX_lsb[0] = 18, 123 124 .has_selfreqdco = true, 125 .has_refsel = true, 126 }; 127 128 static int hdmi_init_pll_data(struct dss_device *dss, 129 struct platform_device *pdev, 130 struct hdmi_pll_data *hpll) 131 { 132 struct dss_pll *pll = &hpll->pll; 133 struct clk *clk; 134 int r; 135 136 clk = devm_clk_get(&pdev->dev, "sys_clk"); 137 if (IS_ERR(clk)) { 138 DSSERR("can't get sys_clk\n"); 139 return PTR_ERR(clk); 140 } 141 142 pll->name = "hdmi"; 143 pll->id = DSS_PLL_HDMI; 144 pll->base = hpll->base; 145 pll->clkin = clk; 146 147 if (hpll->wp->version == 4) 148 pll->hw = &dss_omap4_hdmi_pll_hw; 149 else 150 pll->hw = &dss_omap5_hdmi_pll_hw; 151 152 pll->ops = &hdmi_pll_ops; 153 154 r = dss_pll_register(dss, pll); 155 if (r) 156 return r; 157 158 return 0; 159 } 160 161 int hdmi_pll_init(struct dss_device *dss, struct platform_device *pdev, 162 struct hdmi_pll_data *pll, struct hdmi_wp_data *wp) 163 { 164 int r; 165 struct resource *res; 166 167 pll->pdev = pdev; 168 pll->wp = wp; 169 170 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pll"); 171 pll->base = devm_ioremap_resource(&pdev->dev, res); 172 if (IS_ERR(pll->base)) 173 return PTR_ERR(pll->base); 174 175 r = hdmi_init_pll_data(dss, pdev, pll); 176 if (r) { 177 DSSERR("failed to init HDMI PLL\n"); 178 return r; 179 } 180 181 return 0; 182 } 183 184 void hdmi_pll_uninit(struct hdmi_pll_data *hpll) 185 { 186 struct dss_pll *pll = &hpll->pll; 187 188 dss_pll_unregister(pll); 189 } 190