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_CCORR_EN 0x0000 19 #define CCORR_EN BIT(0) 20 #define DISP_CCORR_CFG 0x0020 21 #define CCORR_RELAY_MODE BIT(0) 22 #define CCORR_ENGINE_EN BIT(1) 23 #define CCORR_GAMMA_OFF BIT(2) 24 #define CCORR_WGAMUT_SRC_CLIP BIT(3) 25 #define DISP_CCORR_SIZE 0x0030 26 #define DISP_CCORR_COEF_0 0x0080 27 #define DISP_CCORR_COEF_1 0x0084 28 #define DISP_CCORR_COEF_2 0x0088 29 #define DISP_CCORR_COEF_3 0x008C 30 #define DISP_CCORR_COEF_4 0x0090 31 32 struct mtk_disp_ccorr_data { 33 u32 matrix_bits; 34 }; 35 36 /** 37 * struct mtk_disp_ccorr - DISP_CCORR driver structure 38 * @ddp_comp - structure containing type enum and hardware resources 39 * @crtc - associated crtc to report irq events to 40 */ 41 struct mtk_disp_ccorr { 42 struct clk *clk; 43 void __iomem *regs; 44 struct cmdq_client_reg cmdq_reg; 45 const struct mtk_disp_ccorr_data *data; 46 }; 47 48 int mtk_ccorr_clk_enable(struct device *dev) 49 { 50 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 51 52 return clk_prepare_enable(ccorr->clk); 53 } 54 55 void mtk_ccorr_clk_disable(struct device *dev) 56 { 57 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 58 59 clk_disable_unprepare(ccorr->clk); 60 } 61 62 void mtk_ccorr_config(struct device *dev, unsigned int w, 63 unsigned int h, unsigned int vrefresh, 64 unsigned int bpc, struct cmdq_pkt *cmdq_pkt) 65 { 66 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 67 68 mtk_ddp_write(cmdq_pkt, w << 16 | h, &ccorr->cmdq_reg, ccorr->regs, 69 DISP_CCORR_SIZE); 70 mtk_ddp_write(cmdq_pkt, CCORR_ENGINE_EN, &ccorr->cmdq_reg, ccorr->regs, 71 DISP_CCORR_CFG); 72 } 73 74 void mtk_ccorr_start(struct device *dev) 75 { 76 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 77 78 writel(CCORR_EN, ccorr->regs + DISP_CCORR_EN); 79 } 80 81 void mtk_ccorr_stop(struct device *dev) 82 { 83 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 84 85 writel_relaxed(0x0, ccorr->regs + DISP_CCORR_EN); 86 } 87 88 /* Converts a DRM S31.32 value to the HW S1.n format. */ 89 static u16 mtk_ctm_s31_32_to_s1_n(u64 in, u32 n) 90 { 91 u16 r; 92 93 /* Sign bit. */ 94 r = in & BIT_ULL(63) ? BIT(n + 1) : 0; 95 96 if ((in & GENMASK_ULL(62, 33)) > 0) { 97 /* identity value 0x100000000 -> 0x400(mt8183), */ 98 /* identity value 0x100000000 -> 0x800(mt8192), */ 99 /* if bigger this, set it to max 0x7ff. */ 100 r |= GENMASK(n, 0); 101 } else { 102 /* take the n+1 most important bits. */ 103 r |= (in >> (32 - n)) & GENMASK(n, 0); 104 } 105 106 return r; 107 } 108 109 void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state) 110 { 111 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 112 struct drm_property_blob *blob = state->ctm; 113 struct drm_color_ctm *ctm; 114 const u64 *input; 115 uint16_t coeffs[9] = { 0 }; 116 int i; 117 struct cmdq_pkt *cmdq_pkt = NULL; 118 u32 matrix_bits = ccorr->data->matrix_bits; 119 120 if (!blob) 121 return; 122 123 ctm = (struct drm_color_ctm *)blob->data; 124 input = ctm->matrix; 125 126 for (i = 0; i < ARRAY_SIZE(coeffs); i++) 127 coeffs[i] = mtk_ctm_s31_32_to_s1_n(input[i], matrix_bits); 128 129 mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1], 130 &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_0); 131 mtk_ddp_write(cmdq_pkt, coeffs[2] << 16 | coeffs[3], 132 &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_1); 133 mtk_ddp_write(cmdq_pkt, coeffs[4] << 16 | coeffs[5], 134 &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_2); 135 mtk_ddp_write(cmdq_pkt, coeffs[6] << 16 | coeffs[7], 136 &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_3); 137 mtk_ddp_write(cmdq_pkt, coeffs[8] << 16, 138 &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_4); 139 } 140 141 static int mtk_disp_ccorr_bind(struct device *dev, struct device *master, 142 void *data) 143 { 144 return 0; 145 } 146 147 static void mtk_disp_ccorr_unbind(struct device *dev, struct device *master, 148 void *data) 149 { 150 } 151 152 static const struct component_ops mtk_disp_ccorr_component_ops = { 153 .bind = mtk_disp_ccorr_bind, 154 .unbind = mtk_disp_ccorr_unbind, 155 }; 156 157 static int mtk_disp_ccorr_probe(struct platform_device *pdev) 158 { 159 struct device *dev = &pdev->dev; 160 struct mtk_disp_ccorr *priv; 161 struct resource *res; 162 int ret; 163 164 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 165 if (!priv) 166 return -ENOMEM; 167 168 priv->clk = devm_clk_get(dev, NULL); 169 if (IS_ERR(priv->clk)) { 170 dev_err(dev, "failed to get ccorr clk\n"); 171 return PTR_ERR(priv->clk); 172 } 173 174 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 175 priv->regs = devm_ioremap_resource(dev, res); 176 if (IS_ERR(priv->regs)) { 177 dev_err(dev, "failed to ioremap ccorr\n"); 178 return PTR_ERR(priv->regs); 179 } 180 181 #if IS_REACHABLE(CONFIG_MTK_CMDQ) 182 ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); 183 if (ret) 184 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n"); 185 #endif 186 187 priv->data = of_device_get_match_data(dev); 188 platform_set_drvdata(pdev, priv); 189 190 ret = component_add(dev, &mtk_disp_ccorr_component_ops); 191 if (ret) 192 dev_err(dev, "Failed to add component: %d\n", ret); 193 194 return ret; 195 } 196 197 static int mtk_disp_ccorr_remove(struct platform_device *pdev) 198 { 199 component_del(&pdev->dev, &mtk_disp_ccorr_component_ops); 200 201 return 0; 202 } 203 204 static const struct mtk_disp_ccorr_data mt8183_ccorr_driver_data = { 205 .matrix_bits = 10, 206 }; 207 208 static const struct of_device_id mtk_disp_ccorr_driver_dt_match[] = { 209 { .compatible = "mediatek,mt8183-disp-ccorr", 210 .data = &mt8183_ccorr_driver_data}, 211 {}, 212 }; 213 MODULE_DEVICE_TABLE(of, mtk_disp_ccorr_driver_dt_match); 214 215 struct platform_driver mtk_disp_ccorr_driver = { 216 .probe = mtk_disp_ccorr_probe, 217 .remove = mtk_disp_ccorr_remove, 218 .driver = { 219 .name = "mediatek-disp-ccorr", 220 .owner = THIS_MODULE, 221 .of_match_table = mtk_disp_ccorr_driver_dt_match, 222 }, 223 }; 224