1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2021 MediaTek Inc. 4 */ 5 6 #include <linux/clk.h> 7 #include <linux/component.h> 8 #include <linux/module.h> 9 #include <linux/of_device.h> 10 #include <linux/of_irq.h> 11 #include <linux/platform_device.h> 12 #include <linux/soc/mediatek/mtk-cmdq.h> 13 14 #include "mtk_disp_drv.h" 15 #include "mtk_drm_crtc.h" 16 #include "mtk_drm_ddp_comp.h" 17 18 #define DISP_AAL_EN 0x0000 19 #define AAL_EN BIT(0) 20 #define DISP_AAL_SIZE 0x0030 21 22 23 struct mtk_disp_aal_data { 24 bool has_gamma; 25 }; 26 27 /** 28 * struct mtk_disp_aal - DISP_AAL driver structure 29 * @ddp_comp - structure containing type enum and hardware resources 30 * @crtc - associated crtc to report irq events to 31 */ 32 struct mtk_disp_aal { 33 struct clk *clk; 34 void __iomem *regs; 35 struct cmdq_client_reg cmdq_reg; 36 const struct mtk_disp_aal_data *data; 37 }; 38 39 int mtk_aal_clk_enable(struct device *dev) 40 { 41 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 42 43 return clk_prepare_enable(aal->clk); 44 } 45 46 void mtk_aal_clk_disable(struct device *dev) 47 { 48 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 49 50 clk_disable_unprepare(aal->clk); 51 } 52 53 void mtk_aal_config(struct device *dev, unsigned int w, 54 unsigned int h, unsigned int vrefresh, 55 unsigned int bpc, struct cmdq_pkt *cmdq_pkt) 56 { 57 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 58 59 mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE); 60 } 61 62 void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state) 63 { 64 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 65 66 if (aal->data && aal->data->has_gamma) 67 mtk_gamma_set_common(aal->regs, state); 68 } 69 70 void mtk_aal_start(struct device *dev) 71 { 72 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 73 74 writel(AAL_EN, aal->regs + DISP_AAL_EN); 75 } 76 77 void mtk_aal_stop(struct device *dev) 78 { 79 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 80 81 writel_relaxed(0x0, aal->regs + DISP_AAL_EN); 82 } 83 84 static int mtk_disp_aal_bind(struct device *dev, struct device *master, 85 void *data) 86 { 87 return 0; 88 } 89 90 static void mtk_disp_aal_unbind(struct device *dev, struct device *master, 91 void *data) 92 { 93 } 94 95 static const struct component_ops mtk_disp_aal_component_ops = { 96 .bind = mtk_disp_aal_bind, 97 .unbind = mtk_disp_aal_unbind, 98 }; 99 100 static int mtk_disp_aal_probe(struct platform_device *pdev) 101 { 102 struct device *dev = &pdev->dev; 103 struct mtk_disp_aal *priv; 104 struct resource *res; 105 int ret; 106 107 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 108 if (!priv) 109 return -ENOMEM; 110 111 priv->clk = devm_clk_get(dev, NULL); 112 if (IS_ERR(priv->clk)) { 113 dev_err(dev, "failed to get aal clk\n"); 114 return PTR_ERR(priv->clk); 115 } 116 117 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 118 priv->regs = devm_ioremap_resource(dev, res); 119 if (IS_ERR(priv->regs)) { 120 dev_err(dev, "failed to ioremap aal\n"); 121 return PTR_ERR(priv->regs); 122 } 123 124 #if IS_REACHABLE(CONFIG_MTK_CMDQ) 125 ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); 126 if (ret) 127 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n"); 128 #endif 129 130 priv->data = of_device_get_match_data(dev); 131 platform_set_drvdata(pdev, priv); 132 133 ret = component_add(dev, &mtk_disp_aal_component_ops); 134 if (ret) 135 dev_err(dev, "Failed to add component: %d\n", ret); 136 137 return ret; 138 } 139 140 static int mtk_disp_aal_remove(struct platform_device *pdev) 141 { 142 component_del(&pdev->dev, &mtk_disp_aal_component_ops); 143 144 return 0; 145 } 146 147 static const struct mtk_disp_aal_data mt8173_aal_driver_data = { 148 .has_gamma = true, 149 }; 150 151 static const struct of_device_id mtk_disp_aal_driver_dt_match[] = { 152 { .compatible = "mediatek,mt8173-disp-aal", 153 .data = &mt8173_aal_driver_data}, 154 {}, 155 }; 156 MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match); 157 158 struct platform_driver mtk_disp_aal_driver = { 159 .probe = mtk_disp_aal_probe, 160 .remove = mtk_disp_aal_remove, 161 .driver = { 162 .name = "mediatek-disp-aal", 163 .owner = THIS_MODULE, 164 .of_match_table = mtk_disp_aal_driver_dt_match, 165 }, 166 }; 167