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 #include "mtk_drm_drv.h" 18 19 #define DISP_AAL_EN 0x0000 20 #define AAL_EN BIT(0) 21 #define DISP_AAL_SIZE 0x0030 22 #define DISP_AAL_OUTPUT_SIZE 0x04d8 23 24 25 struct mtk_disp_aal_data { 26 bool has_gamma; 27 }; 28 29 /** 30 * struct mtk_disp_aal - DISP_AAL driver structure 31 * @ddp_comp - structure containing type enum and hardware resources 32 * @crtc - associated crtc to report irq events to 33 */ 34 struct mtk_disp_aal { 35 struct clk *clk; 36 void __iomem *regs; 37 struct cmdq_client_reg cmdq_reg; 38 const struct mtk_disp_aal_data *data; 39 }; 40 41 int mtk_aal_clk_enable(struct device *dev) 42 { 43 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 44 45 return clk_prepare_enable(aal->clk); 46 } 47 48 void mtk_aal_clk_disable(struct device *dev) 49 { 50 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 51 52 clk_disable_unprepare(aal->clk); 53 } 54 55 void mtk_aal_config(struct device *dev, unsigned int w, 56 unsigned int h, unsigned int vrefresh, 57 unsigned int bpc, struct cmdq_pkt *cmdq_pkt) 58 { 59 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 60 61 mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE); 62 mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE); 63 } 64 65 void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state) 66 { 67 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 68 69 if (aal->data && aal->data->has_gamma) 70 mtk_gamma_set_common(aal->regs, state, false); 71 } 72 73 void mtk_aal_start(struct device *dev) 74 { 75 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 76 77 writel(AAL_EN, aal->regs + DISP_AAL_EN); 78 } 79 80 void mtk_aal_stop(struct device *dev) 81 { 82 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 83 84 writel_relaxed(0x0, aal->regs + DISP_AAL_EN); 85 } 86 87 static int mtk_disp_aal_bind(struct device *dev, struct device *master, 88 void *data) 89 { 90 return 0; 91 } 92 93 static void mtk_disp_aal_unbind(struct device *dev, struct device *master, 94 void *data) 95 { 96 } 97 98 static const struct component_ops mtk_disp_aal_component_ops = { 99 .bind = mtk_disp_aal_bind, 100 .unbind = mtk_disp_aal_unbind, 101 }; 102 103 static int mtk_disp_aal_probe(struct platform_device *pdev) 104 { 105 struct device *dev = &pdev->dev; 106 struct mtk_disp_aal *priv; 107 struct resource *res; 108 int ret; 109 110 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 111 if (!priv) 112 return -ENOMEM; 113 114 priv->clk = devm_clk_get(dev, NULL); 115 if (IS_ERR(priv->clk)) { 116 dev_err(dev, "failed to get aal clk\n"); 117 return PTR_ERR(priv->clk); 118 } 119 120 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 121 priv->regs = devm_ioremap_resource(dev, res); 122 if (IS_ERR(priv->regs)) { 123 dev_err(dev, "failed to ioremap aal\n"); 124 return PTR_ERR(priv->regs); 125 } 126 127 #if IS_REACHABLE(CONFIG_MTK_CMDQ) 128 ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); 129 if (ret) 130 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n"); 131 #endif 132 133 priv->data = of_device_get_match_data(dev); 134 platform_set_drvdata(pdev, priv); 135 136 ret = component_add(dev, &mtk_disp_aal_component_ops); 137 if (ret) 138 dev_err(dev, "Failed to add component: %d\n", ret); 139 140 return ret; 141 } 142 143 static int mtk_disp_aal_remove(struct platform_device *pdev) 144 { 145 component_del(&pdev->dev, &mtk_disp_aal_component_ops); 146 147 return 0; 148 } 149 150 static const struct mtk_disp_aal_data mt8173_aal_driver_data = { 151 .has_gamma = true, 152 }; 153 154 static const struct of_device_id mtk_disp_aal_driver_dt_match[] = { 155 { .compatible = "mediatek,mt8173-disp-aal", 156 .data = &mt8173_aal_driver_data}, 157 { .compatible = "mediatek,mt8183-disp-aal"}, 158 {}, 159 }; 160 MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match); 161 162 struct platform_driver mtk_disp_aal_driver = { 163 .probe = mtk_disp_aal_probe, 164 .remove = mtk_disp_aal_remove, 165 .driver = { 166 .name = "mediatek-disp-aal", 167 .owner = THIS_MODULE, 168 .of_match_table = mtk_disp_aal_driver_dt_match, 169 }, 170 }; 171