// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2021 MediaTek Inc. */ #include #include #include #include #include #include #include #include "mtk_crtc.h" #include "mtk_ddp_comp.h" #include "mtk_disp_drv.h" #include "mtk_drm_drv.h" #define DISP_AAL_EN 0x0000 #define AAL_EN BIT(0) #define DISP_AAL_CFG 0x0020 #define AAL_RELAY_MODE BIT(0) #define AAL_GAMMA_LUT_EN BIT(1) #define DISP_AAL_SIZE 0x0030 #define DISP_AAL_SIZE_HSIZE GENMASK(28, 16) #define DISP_AAL_SIZE_VSIZE GENMASK(12, 0) #define DISP_AAL_OUTPUT_SIZE 0x04d8 #define DISP_AAL_GAMMA_LUT 0x0700 #define DISP_AAL_GAMMA_LUT_R GENMASK(29, 20) #define DISP_AAL_GAMMA_LUT_G GENMASK(19, 10) #define DISP_AAL_GAMMA_LUT_B GENMASK(9, 0) #define DISP_AAL_LUT_BITS 10 #define DISP_AAL_LUT_SIZE 512 struct mtk_disp_aal_data { bool has_gamma; }; /** * struct mtk_disp_aal - Display Adaptive Ambient Light driver structure * @clk: clock for DISP_AAL controller * @regs: MMIO registers base * @cmdq_reg: CMDQ Client register * @data: platform specific data for DISP_AAL */ struct mtk_disp_aal { struct clk *clk; void __iomem *regs; struct cmdq_client_reg cmdq_reg; const struct mtk_disp_aal_data *data; }; int mtk_aal_clk_enable(struct device *dev) { struct mtk_disp_aal *aal = dev_get_drvdata(dev); return clk_prepare_enable(aal->clk); } void mtk_aal_clk_disable(struct device *dev) { struct mtk_disp_aal *aal = dev_get_drvdata(dev); clk_disable_unprepare(aal->clk); } void mtk_aal_config(struct device *dev, unsigned int w, unsigned int h, unsigned int vrefresh, unsigned int bpc, struct cmdq_pkt *cmdq_pkt) { struct mtk_disp_aal *aal = dev_get_drvdata(dev); u32 sz; sz = FIELD_PREP(DISP_AAL_SIZE_HSIZE, w); sz |= FIELD_PREP(DISP_AAL_SIZE_VSIZE, h); mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE); mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE); } /** * mtk_aal_gamma_get_lut_size() - Get gamma LUT size for AAL * @dev: Pointer to struct device * * Return: 0 if gamma control not supported in AAL or gamma LUT size */ unsigned int mtk_aal_gamma_get_lut_size(struct device *dev) { struct mtk_disp_aal *aal = dev_get_drvdata(dev); if (aal->data && aal->data->has_gamma) return DISP_AAL_LUT_SIZE; return 0; } void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state) { struct mtk_disp_aal *aal = dev_get_drvdata(dev); struct drm_color_lut *lut; unsigned int i; u32 cfg_val; /* If gamma is not supported in AAL, go out immediately */ if (!(aal->data && aal->data->has_gamma)) return; /* Also, if there's no gamma lut there's nothing to do here. */ if (!state->gamma_lut) return; lut = (struct drm_color_lut *)state->gamma_lut->data; for (i = 0; i < DISP_AAL_LUT_SIZE; i++) { struct drm_color_lut hwlut = { .red = drm_color_lut_extract(lut[i].red, DISP_AAL_LUT_BITS), .green = drm_color_lut_extract(lut[i].green, DISP_AAL_LUT_BITS), .blue = drm_color_lut_extract(lut[i].blue, DISP_AAL_LUT_BITS) }; u32 word; word = FIELD_PREP(DISP_AAL_GAMMA_LUT_R, hwlut.red); word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_G, hwlut.green); word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_B, hwlut.blue); writel(word, aal->regs + DISP_AAL_GAMMA_LUT + i * 4); } cfg_val = readl(aal->regs + DISP_AAL_CFG); /* Enable the gamma table */ cfg_val |= FIELD_PREP(AAL_GAMMA_LUT_EN, 1); /* Disable RELAY mode to pass the processed image */ cfg_val &= ~AAL_RELAY_MODE; writel(cfg_val, aal->regs + DISP_AAL_CFG); } void mtk_aal_start(struct device *dev) { struct mtk_disp_aal *aal = dev_get_drvdata(dev); writel(AAL_EN, aal->regs + DISP_AAL_EN); } void mtk_aal_stop(struct device *dev) { struct mtk_disp_aal *aal = dev_get_drvdata(dev); writel_relaxed(0x0, aal->regs + DISP_AAL_EN); } static int mtk_disp_aal_bind(struct device *dev, struct device *master, void *data) { return 0; } static void mtk_disp_aal_unbind(struct device *dev, struct device *master, void *data) { } static const struct component_ops mtk_disp_aal_component_ops = { .bind = mtk_disp_aal_bind, .unbind = mtk_disp_aal_unbind, }; static int mtk_disp_aal_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct mtk_disp_aal *priv; int ret; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->clk = devm_clk_get(dev, NULL); if (IS_ERR(priv->clk)) return dev_err_probe(dev, PTR_ERR(priv->clk), "failed to get aal clk\n"); priv->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(priv->regs)) return dev_err_probe(dev, PTR_ERR(priv->regs), "failed to ioremap aal\n"); #if IS_REACHABLE(CONFIG_MTK_CMDQ) ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); if (ret) dev_dbg(dev, "get mediatek,gce-client-reg fail!\n"); #endif priv->data = of_device_get_match_data(dev); platform_set_drvdata(pdev, priv); ret = component_add(dev, &mtk_disp_aal_component_ops); if (ret) return dev_err_probe(dev, ret, "Failed to add component\n"); return 0; } static void mtk_disp_aal_remove(struct platform_device *pdev) { component_del(&pdev->dev, &mtk_disp_aal_component_ops); } static const struct mtk_disp_aal_data mt8173_aal_driver_data = { .has_gamma = true, }; static const struct of_device_id mtk_disp_aal_driver_dt_match[] = { { .compatible = "mediatek,mt8173-disp-aal", .data = &mt8173_aal_driver_data }, { .compatible = "mediatek,mt8183-disp-aal" }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match); struct platform_driver mtk_disp_aal_driver = { .probe = mtk_disp_aal_probe, .remove_new = mtk_disp_aal_remove, .driver = { .name = "mediatek-disp-aal", .of_match_table = mtk_disp_aal_driver_dt_match, }, };