1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2017 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_COLOR_CFG_MAIN 0x0400 19 #define DISP_COLOR_START_MT2701 0x0f00 20 #define DISP_COLOR_START_MT8167 0x0400 21 #define DISP_COLOR_START_MT8173 0x0c00 22 #define DISP_COLOR_START(comp) ((comp)->data->color_offset) 23 #define DISP_COLOR_WIDTH(comp) (DISP_COLOR_START(comp) + 0x50) 24 #define DISP_COLOR_HEIGHT(comp) (DISP_COLOR_START(comp) + 0x54) 25 26 #define COLOR_BYPASS_ALL BIT(7) 27 #define COLOR_SEQ_SEL BIT(13) 28 29 struct mtk_disp_color_data { 30 unsigned int color_offset; 31 }; 32 33 /* 34 * struct mtk_disp_color - DISP_COLOR driver structure 35 * @crtc: associated crtc to report irq events to 36 * @data: platform colour driver data 37 */ 38 struct mtk_disp_color { 39 struct drm_crtc *crtc; 40 struct clk *clk; 41 void __iomem *regs; 42 struct cmdq_client_reg cmdq_reg; 43 const struct mtk_disp_color_data *data; 44 }; 45 46 int mtk_color_clk_enable(struct device *dev) 47 { 48 struct mtk_disp_color *color = dev_get_drvdata(dev); 49 50 return clk_prepare_enable(color->clk); 51 } 52 53 void mtk_color_clk_disable(struct device *dev) 54 { 55 struct mtk_disp_color *color = dev_get_drvdata(dev); 56 57 clk_disable_unprepare(color->clk); 58 } 59 60 void mtk_color_config(struct device *dev, unsigned int w, 61 unsigned int h, unsigned int vrefresh, 62 unsigned int bpc, struct cmdq_pkt *cmdq_pkt) 63 { 64 struct mtk_disp_color *color = dev_get_drvdata(dev); 65 66 mtk_ddp_write(cmdq_pkt, w, &color->cmdq_reg, color->regs, DISP_COLOR_WIDTH(color)); 67 mtk_ddp_write(cmdq_pkt, h, &color->cmdq_reg, color->regs, DISP_COLOR_HEIGHT(color)); 68 } 69 70 void mtk_color_start(struct device *dev) 71 { 72 struct mtk_disp_color *color = dev_get_drvdata(dev); 73 74 writel(COLOR_BYPASS_ALL | COLOR_SEQ_SEL, 75 color->regs + DISP_COLOR_CFG_MAIN); 76 writel(0x1, color->regs + DISP_COLOR_START(color)); 77 } 78 79 static int mtk_disp_color_bind(struct device *dev, struct device *master, 80 void *data) 81 { 82 return 0; 83 } 84 85 static void mtk_disp_color_unbind(struct device *dev, struct device *master, 86 void *data) 87 { 88 } 89 90 static const struct component_ops mtk_disp_color_component_ops = { 91 .bind = mtk_disp_color_bind, 92 .unbind = mtk_disp_color_unbind, 93 }; 94 95 static int mtk_disp_color_probe(struct platform_device *pdev) 96 { 97 struct device *dev = &pdev->dev; 98 struct mtk_disp_color *priv; 99 struct resource *res; 100 int ret; 101 102 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 103 if (!priv) 104 return -ENOMEM; 105 106 priv->clk = devm_clk_get(dev, NULL); 107 if (IS_ERR(priv->clk)) { 108 dev_err(dev, "failed to get color clk\n"); 109 return PTR_ERR(priv->clk); 110 } 111 112 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 113 priv->regs = devm_ioremap_resource(dev, res); 114 if (IS_ERR(priv->regs)) { 115 dev_err(dev, "failed to ioremap color\n"); 116 return PTR_ERR(priv->regs); 117 } 118 #if IS_REACHABLE(CONFIG_MTK_CMDQ) 119 ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); 120 if (ret) 121 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n"); 122 #endif 123 124 priv->data = of_device_get_match_data(dev); 125 platform_set_drvdata(pdev, priv); 126 127 ret = component_add(dev, &mtk_disp_color_component_ops); 128 if (ret) 129 dev_err(dev, "Failed to add component: %d\n", ret); 130 131 return ret; 132 } 133 134 static int mtk_disp_color_remove(struct platform_device *pdev) 135 { 136 component_del(&pdev->dev, &mtk_disp_color_component_ops); 137 138 return 0; 139 } 140 141 static const struct mtk_disp_color_data mt2701_color_driver_data = { 142 .color_offset = DISP_COLOR_START_MT2701, 143 }; 144 145 static const struct mtk_disp_color_data mt8167_color_driver_data = { 146 .color_offset = DISP_COLOR_START_MT8167, 147 }; 148 149 static const struct mtk_disp_color_data mt8173_color_driver_data = { 150 .color_offset = DISP_COLOR_START_MT8173, 151 }; 152 153 static const struct of_device_id mtk_disp_color_driver_dt_match[] = { 154 { .compatible = "mediatek,mt2701-disp-color", 155 .data = &mt2701_color_driver_data}, 156 { .compatible = "mediatek,mt8167-disp-color", 157 .data = &mt8167_color_driver_data}, 158 { .compatible = "mediatek,mt8173-disp-color", 159 .data = &mt8173_color_driver_data}, 160 {}, 161 }; 162 MODULE_DEVICE_TABLE(of, mtk_disp_color_driver_dt_match); 163 164 struct platform_driver mtk_disp_color_driver = { 165 .probe = mtk_disp_color_probe, 166 .remove = mtk_disp_color_remove, 167 .driver = { 168 .name = "mediatek-disp-color", 169 .owner = THIS_MODULE, 170 .of_match_table = mtk_disp_color_driver_dt_match, 171 }, 172 }; 173