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.h> 10 #include <linux/platform_device.h> 11 #include <linux/soc/mediatek/mtk-cmdq.h> 12 13 #include "mtk_disp_drv.h" 14 #include "mtk_drm_crtc.h" 15 #include "mtk_drm_ddp_comp.h" 16 #include "mtk_drm_drv.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 struct mtk_disp_ccorr { 37 struct clk *clk; 38 void __iomem *regs; 39 struct cmdq_client_reg cmdq_reg; 40 const struct mtk_disp_ccorr_data *data; 41 }; 42 43 int mtk_ccorr_clk_enable(struct device *dev) 44 { 45 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 46 47 return clk_prepare_enable(ccorr->clk); 48 } 49 50 void mtk_ccorr_clk_disable(struct device *dev) 51 { 52 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 53 54 clk_disable_unprepare(ccorr->clk); 55 } 56 57 void mtk_ccorr_config(struct device *dev, unsigned int w, 58 unsigned int h, unsigned int vrefresh, 59 unsigned int bpc, struct cmdq_pkt *cmdq_pkt) 60 { 61 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 62 63 mtk_ddp_write(cmdq_pkt, w << 16 | h, &ccorr->cmdq_reg, ccorr->regs, 64 DISP_CCORR_SIZE); 65 mtk_ddp_write(cmdq_pkt, CCORR_ENGINE_EN, &ccorr->cmdq_reg, ccorr->regs, 66 DISP_CCORR_CFG); 67 } 68 69 void mtk_ccorr_start(struct device *dev) 70 { 71 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 72 73 writel(CCORR_EN, ccorr->regs + DISP_CCORR_EN); 74 } 75 76 void mtk_ccorr_stop(struct device *dev) 77 { 78 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 79 80 writel_relaxed(0x0, ccorr->regs + DISP_CCORR_EN); 81 } 82 83 /* Converts a DRM S31.32 value to the HW S1.n format. */ 84 static u16 mtk_ctm_s31_32_to_s1_n(u64 in, u32 n) 85 { 86 u16 r; 87 88 /* Sign bit. */ 89 r = in & BIT_ULL(63) ? BIT(n + 1) : 0; 90 91 if ((in & GENMASK_ULL(62, 33)) > 0) { 92 /* identity value 0x100000000 -> 0x400(mt8183), */ 93 /* identity value 0x100000000 -> 0x800(mt8192), */ 94 /* if bigger this, set it to max 0x7ff. */ 95 r |= GENMASK(n, 0); 96 } else { 97 /* take the n+1 most important bits. */ 98 r |= (in >> (32 - n)) & GENMASK(n, 0); 99 } 100 101 return r; 102 } 103 104 void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state) 105 { 106 struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); 107 struct drm_property_blob *blob = state->ctm; 108 struct drm_color_ctm *ctm; 109 const u64 *input; 110 uint16_t coeffs[9] = { 0 }; 111 int i; 112 struct cmdq_pkt *cmdq_pkt = NULL; 113 u32 matrix_bits = ccorr->data->matrix_bits; 114 115 if (!blob) 116 return; 117 118 ctm = (struct drm_color_ctm *)blob->data; 119 input = ctm->matrix; 120 121 for (i = 0; i < ARRAY_SIZE(coeffs); i++) 122 coeffs[i] = mtk_ctm_s31_32_to_s1_n(input[i], matrix_bits); 123 124 mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1], 125 &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_0); 126 mtk_ddp_write(cmdq_pkt, coeffs[2] << 16 | coeffs[3], 127 &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_1); 128 mtk_ddp_write(cmdq_pkt, coeffs[4] << 16 | coeffs[5], 129 &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_2); 130 mtk_ddp_write(cmdq_pkt, coeffs[6] << 16 | coeffs[7], 131 &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_3); 132 mtk_ddp_write(cmdq_pkt, coeffs[8] << 16, 133 &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_4); 134 } 135 136 static int mtk_disp_ccorr_bind(struct device *dev, struct device *master, 137 void *data) 138 { 139 return 0; 140 } 141 142 static void mtk_disp_ccorr_unbind(struct device *dev, struct device *master, 143 void *data) 144 { 145 } 146 147 static const struct component_ops mtk_disp_ccorr_component_ops = { 148 .bind = mtk_disp_ccorr_bind, 149 .unbind = mtk_disp_ccorr_unbind, 150 }; 151 152 static int mtk_disp_ccorr_probe(struct platform_device *pdev) 153 { 154 struct device *dev = &pdev->dev; 155 struct mtk_disp_ccorr *priv; 156 struct resource *res; 157 int ret; 158 159 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 160 if (!priv) 161 return -ENOMEM; 162 163 priv->clk = devm_clk_get(dev, NULL); 164 if (IS_ERR(priv->clk)) { 165 dev_err(dev, "failed to get ccorr clk\n"); 166 return PTR_ERR(priv->clk); 167 } 168 169 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 170 priv->regs = devm_ioremap_resource(dev, res); 171 if (IS_ERR(priv->regs)) { 172 dev_err(dev, "failed to ioremap ccorr\n"); 173 return PTR_ERR(priv->regs); 174 } 175 176 #if IS_REACHABLE(CONFIG_MTK_CMDQ) 177 ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); 178 if (ret) 179 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n"); 180 #endif 181 182 priv->data = of_device_get_match_data(dev); 183 platform_set_drvdata(pdev, priv); 184 185 ret = component_add(dev, &mtk_disp_ccorr_component_ops); 186 if (ret) 187 dev_err(dev, "Failed to add component: %d\n", ret); 188 189 return ret; 190 } 191 192 static void mtk_disp_ccorr_remove(struct platform_device *pdev) 193 { 194 component_del(&pdev->dev, &mtk_disp_ccorr_component_ops); 195 } 196 197 static const struct mtk_disp_ccorr_data mt8183_ccorr_driver_data = { 198 .matrix_bits = 10, 199 }; 200 201 static const struct mtk_disp_ccorr_data mt8192_ccorr_driver_data = { 202 .matrix_bits = 11, 203 }; 204 205 static const struct of_device_id mtk_disp_ccorr_driver_dt_match[] = { 206 { .compatible = "mediatek,mt8183-disp-ccorr", 207 .data = &mt8183_ccorr_driver_data}, 208 { .compatible = "mediatek,mt8192-disp-ccorr", 209 .data = &mt8192_ccorr_driver_data}, 210 {}, 211 }; 212 MODULE_DEVICE_TABLE(of, mtk_disp_ccorr_driver_dt_match); 213 214 struct platform_driver mtk_disp_ccorr_driver = { 215 .probe = mtk_disp_ccorr_probe, 216 .remove_new = mtk_disp_ccorr_remove, 217 .driver = { 218 .name = "mediatek-disp-ccorr", 219 .owner = THIS_MODULE, 220 .of_match_table = mtk_disp_ccorr_driver_dt_match, 221 }, 222 }; 223