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 #define DISP_AAL_OUTPUT_SIZE 0x04d8 22 23 24 struct mtk_disp_aal_data { 25 bool has_gamma; 26 }; 27 28 /** 29 * struct mtk_disp_aal - DISP_AAL driver structure 30 * @ddp_comp - structure containing type enum and hardware resources 31 * @crtc - associated crtc to report irq events to 32 */ 33 struct mtk_disp_aal { 34 struct clk *clk; 35 void __iomem *regs; 36 struct cmdq_client_reg cmdq_reg; 37 const struct mtk_disp_aal_data *data; 38 }; 39 40 int mtk_aal_clk_enable(struct device *dev) 41 { 42 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 43 44 return clk_prepare_enable(aal->clk); 45 } 46 47 void mtk_aal_clk_disable(struct device *dev) 48 { 49 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 50 51 clk_disable_unprepare(aal->clk); 52 } 53 54 void mtk_aal_config(struct device *dev, unsigned int w, 55 unsigned int h, unsigned int vrefresh, 56 unsigned int bpc, struct cmdq_pkt *cmdq_pkt) 57 { 58 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 59 60 mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE); 61 mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE); 62 } 63 64 void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state) 65 { 66 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 67 68 if (aal->data && aal->data->has_gamma) 69 mtk_gamma_set_common(aal->regs, state); 70 } 71 72 void mtk_aal_start(struct device *dev) 73 { 74 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 75 76 writel(AAL_EN, aal->regs + DISP_AAL_EN); 77 } 78 79 void mtk_aal_stop(struct device *dev) 80 { 81 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 82 83 writel_relaxed(0x0, aal->regs + DISP_AAL_EN); 84 } 85 86 static int mtk_disp_aal_bind(struct device *dev, struct device *master, 87 void *data) 88 { 89 return 0; 90 } 91 92 static void mtk_disp_aal_unbind(struct device *dev, struct device *master, 93 void *data) 94 { 95 } 96 97 static const struct component_ops mtk_disp_aal_component_ops = { 98 .bind = mtk_disp_aal_bind, 99 .unbind = mtk_disp_aal_unbind, 100 }; 101 102 static int mtk_disp_aal_probe(struct platform_device *pdev) 103 { 104 struct device *dev = &pdev->dev; 105 struct mtk_disp_aal *priv; 106 struct resource *res; 107 int ret; 108 109 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 110 if (!priv) 111 return -ENOMEM; 112 113 priv->clk = devm_clk_get(dev, NULL); 114 if (IS_ERR(priv->clk)) { 115 dev_err(dev, "failed to get aal clk\n"); 116 return PTR_ERR(priv->clk); 117 } 118 119 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 120 priv->regs = devm_ioremap_resource(dev, res); 121 if (IS_ERR(priv->regs)) { 122 dev_err(dev, "failed to ioremap aal\n"); 123 return PTR_ERR(priv->regs); 124 } 125 126 #if IS_REACHABLE(CONFIG_MTK_CMDQ) 127 ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); 128 if (ret) 129 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n"); 130 #endif 131 132 priv->data = of_device_get_match_data(dev); 133 platform_set_drvdata(pdev, priv); 134 135 ret = component_add(dev, &mtk_disp_aal_component_ops); 136 if (ret) 137 dev_err(dev, "Failed to add component: %d\n", ret); 138 139 return ret; 140 } 141 142 static int mtk_disp_aal_remove(struct platform_device *pdev) 143 { 144 component_del(&pdev->dev, &mtk_disp_aal_component_ops); 145 146 return 0; 147 } 148 149 static const struct mtk_disp_aal_data mt8173_aal_driver_data = { 150 .has_gamma = true, 151 }; 152 153 static const struct of_device_id mtk_disp_aal_driver_dt_match[] = { 154 { .compatible = "mediatek,mt8173-disp-aal", 155 .data = &mt8173_aal_driver_data}, 156 { .compatible = "mediatek,mt8183-disp-aal"}, 157 {}, 158 }; 159 MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match); 160 161 struct platform_driver mtk_disp_aal_driver = { 162 .probe = mtk_disp_aal_probe, 163 .remove = mtk_disp_aal_remove, 164 .driver = { 165 .name = "mediatek-disp-aal", 166 .owner = THIS_MODULE, 167 .of_match_table = mtk_disp_aal_driver_dt_match, 168 }, 169 }; 170