drivers/gpu/drm/mediatek/mtk_disp_ccorr.c

   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 };