1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2021 MediaTek Inc. 4 */ 5 6 #include <linux/bitfield.h> 7 #include <linux/clk.h> 8 #include <linux/component.h> 9 #include <linux/module.h> 10 #include <linux/of.h> 11 #include <linux/platform_device.h> 12 #include <linux/soc/mediatek/mtk-cmdq.h> 13 14 #include "mtk_crtc.h" 15 #include "mtk_ddp_comp.h" 16 #include "mtk_disp_drv.h" 17 #include "mtk_drm_drv.h" 18 19 #define DISP_AAL_EN 0x0000 20 #define AAL_EN BIT(0) 21 #define DISP_AAL_CFG 0x0020 22 #define AAL_RELAY_MODE BIT(0) 23 #define AAL_GAMMA_LUT_EN BIT(1) 24 #define DISP_AAL_SIZE 0x0030 25 #define DISP_AAL_SIZE_HSIZE GENMASK(28, 16) 26 #define DISP_AAL_SIZE_VSIZE GENMASK(12, 0) 27 #define DISP_AAL_OUTPUT_SIZE 0x04d8 28 #define DISP_AAL_GAMMA_LUT 0x0700 29 #define DISP_AAL_GAMMA_LUT_R GENMASK(29, 20) 30 #define DISP_AAL_GAMMA_LUT_G GENMASK(19, 10) 31 #define DISP_AAL_GAMMA_LUT_B GENMASK(9, 0) 32 #define DISP_AAL_LUT_BITS 10 33 #define DISP_AAL_LUT_SIZE 512 34 35 struct mtk_disp_aal_data { 36 bool has_gamma; 37 }; 38 39 /** 40 * struct mtk_disp_aal - Display Adaptive Ambient Light driver structure 41 * @clk: clock for DISP_AAL controller 42 * @regs: MMIO registers base 43 * @cmdq_reg: CMDQ Client register 44 * @data: platform specific data for DISP_AAL 45 */ 46 struct mtk_disp_aal { 47 struct clk *clk; 48 void __iomem *regs; 49 struct cmdq_client_reg cmdq_reg; 50 const struct mtk_disp_aal_data *data; 51 }; 52 53 int mtk_aal_clk_enable(struct device *dev) 54 { 55 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 56 57 return clk_prepare_enable(aal->clk); 58 } 59 60 void mtk_aal_clk_disable(struct device *dev) 61 { 62 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 63 64 clk_disable_unprepare(aal->clk); 65 } 66 67 void mtk_aal_config(struct device *dev, unsigned int w, 68 unsigned int h, unsigned int vrefresh, 69 unsigned int bpc, struct cmdq_pkt *cmdq_pkt) 70 { 71 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 72 u32 sz; 73 74 sz = FIELD_PREP(DISP_AAL_SIZE_HSIZE, w); 75 sz |= FIELD_PREP(DISP_AAL_SIZE_VSIZE, h); 76 77 mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE); 78 mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE); 79 } 80 81 /** 82 * mtk_aal_gamma_get_lut_size() - Get gamma LUT size for AAL 83 * @dev: Pointer to struct device 84 * 85 * Return: 0 if gamma control not supported in AAL or gamma LUT size 86 */ 87 unsigned int mtk_aal_gamma_get_lut_size(struct device *dev) 88 { 89 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 90 91 if (aal->data && aal->data->has_gamma) 92 return DISP_AAL_LUT_SIZE; 93 return 0; 94 } 95 96 void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state) 97 { 98 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 99 struct drm_color_lut *lut; 100 unsigned int i; 101 u32 cfg_val; 102 103 /* If gamma is not supported in AAL, go out immediately */ 104 if (!(aal->data && aal->data->has_gamma)) 105 return; 106 107 /* Also, if there's no gamma lut there's nothing to do here. */ 108 if (!state->gamma_lut) 109 return; 110 111 lut = (struct drm_color_lut *)state->gamma_lut->data; 112 for (i = 0; i < DISP_AAL_LUT_SIZE; i++) { 113 struct drm_color_lut hwlut = { 114 .red = drm_color_lut_extract(lut[i].red, DISP_AAL_LUT_BITS), 115 .green = drm_color_lut_extract(lut[i].green, DISP_AAL_LUT_BITS), 116 .blue = drm_color_lut_extract(lut[i].blue, DISP_AAL_LUT_BITS) 117 }; 118 u32 word; 119 120 word = FIELD_PREP(DISP_AAL_GAMMA_LUT_R, hwlut.red); 121 word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_G, hwlut.green); 122 word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_B, hwlut.blue); 123 writel(word, aal->regs + DISP_AAL_GAMMA_LUT + i * 4); 124 } 125 126 cfg_val = readl(aal->regs + DISP_AAL_CFG); 127 128 /* Enable the gamma table */ 129 cfg_val |= FIELD_PREP(AAL_GAMMA_LUT_EN, 1); 130 131 /* Disable RELAY mode to pass the processed image */ 132 cfg_val &= ~AAL_RELAY_MODE; 133 134 writel(cfg_val, aal->regs + DISP_AAL_CFG); 135 } 136 137 void mtk_aal_start(struct device *dev) 138 { 139 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 140 141 writel(AAL_EN, aal->regs + DISP_AAL_EN); 142 } 143 144 void mtk_aal_stop(struct device *dev) 145 { 146 struct mtk_disp_aal *aal = dev_get_drvdata(dev); 147 148 writel_relaxed(0x0, aal->regs + DISP_AAL_EN); 149 } 150 151 static int mtk_disp_aal_bind(struct device *dev, struct device *master, 152 void *data) 153 { 154 return 0; 155 } 156 157 static void mtk_disp_aal_unbind(struct device *dev, struct device *master, 158 void *data) 159 { 160 } 161 162 static const struct component_ops mtk_disp_aal_component_ops = { 163 .bind = mtk_disp_aal_bind, 164 .unbind = mtk_disp_aal_unbind, 165 }; 166 167 static int mtk_disp_aal_probe(struct platform_device *pdev) 168 { 169 struct device *dev = &pdev->dev; 170 struct mtk_disp_aal *priv; 171 int ret; 172 173 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 174 if (!priv) 175 return -ENOMEM; 176 177 priv->clk = devm_clk_get(dev, NULL); 178 if (IS_ERR(priv->clk)) 179 return dev_err_probe(dev, PTR_ERR(priv->clk), 180 "failed to get aal clk\n"); 181 182 priv->regs = devm_platform_ioremap_resource(pdev, 0); 183 if (IS_ERR(priv->regs)) 184 return dev_err_probe(dev, PTR_ERR(priv->regs), 185 "failed to ioremap aal\n"); 186 187 #if IS_REACHABLE(CONFIG_MTK_CMDQ) 188 ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); 189 if (ret) 190 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n"); 191 #endif 192 193 priv->data = of_device_get_match_data(dev); 194 platform_set_drvdata(pdev, priv); 195 196 ret = component_add(dev, &mtk_disp_aal_component_ops); 197 if (ret) 198 return dev_err_probe(dev, ret, "Failed to add component\n"); 199 200 return 0; 201 } 202 203 static void mtk_disp_aal_remove(struct platform_device *pdev) 204 { 205 component_del(&pdev->dev, &mtk_disp_aal_component_ops); 206 } 207 208 static const struct mtk_disp_aal_data mt8173_aal_driver_data = { 209 .has_gamma = true, 210 }; 211 212 static const struct of_device_id mtk_disp_aal_driver_dt_match[] = { 213 { .compatible = "mediatek,mt8173-disp-aal", .data = &mt8173_aal_driver_data }, 214 { .compatible = "mediatek,mt8183-disp-aal" }, 215 { /* sentinel */ } 216 }; 217 MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match); 218 219 struct platform_driver mtk_disp_aal_driver = { 220 .probe = mtk_disp_aal_probe, 221 .remove_new = mtk_disp_aal_remove, 222 .driver = { 223 .name = "mediatek-disp-aal", 224 .of_match_table = mtk_disp_aal_driver_dt_match, 225 }, 226 }; 227