drm/mediatek/mtk_disp_aal.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright (c) 2021 MediaTek Inc.
0004  */
0005
0006 #include <linux/clk.h>
0007 #include <linux/component.h>
0008 #include <linux/module.h>
0009 #include <linux/of_device.h>
0010 #include <linux/of_irq.h>
0011 #include <linux/platform_device.h>
0012 #include <linux/soc/mediatek/mtk-cmdq.h>
0013
0014 #include "mtk_disp_drv.h"
0015 #include "mtk_drm_crtc.h"
0016 #include "mtk_drm_ddp_comp.h"
0017
0018 #define DISP_AAL_EN             0x0000
0019 #define AAL_EN                      BIT(0)
0020 #define DISP_AAL_SIZE               0x0030
0021 #define DISP_AAL_OUTPUT_SIZE            0x04d8
0022
0023
0024 struct mtk_disp_aal_data {
0025     bool has_gamma;
0026 };
0027
0028 /**
0029  * struct mtk_disp_aal - DISP_AAL driver structure
0030  * @ddp_comp - structure containing type enum and hardware resources
0031  * @crtc - associated crtc to report irq events to
0032  */
0033 struct mtk_disp_aal {
0034     struct clk *clk;
0035     void __iomem *regs;
0036     struct cmdq_client_reg cmdq_reg;
0037     const struct mtk_disp_aal_data *data;
0038 };
0039
0040 int mtk_aal_clk_enable(struct device *dev)
0041 {
0042     struct mtk_disp_aal *aal = dev_get_drvdata(dev);
0043
0044     return clk_prepare_enable(aal->clk);
0045 }
0046
0047 void mtk_aal_clk_disable(struct device *dev)
0048 {
0049     struct mtk_disp_aal *aal = dev_get_drvdata(dev);
0050
0051     clk_disable_unprepare(aal->clk);
0052 }
0053
0054 void mtk_aal_config(struct device *dev, unsigned int w,
0055                unsigned int h, unsigned int vrefresh,
0056                unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
0057 {
0058     struct mtk_disp_aal *aal = dev_get_drvdata(dev);
0059
0060     mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE);
0061     mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE);
0062 }
0063
0064 void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
0065 {
0066     struct mtk_disp_aal *aal = dev_get_drvdata(dev);
0067
0068     if (aal->data && aal->data->has_gamma)
0069         mtk_gamma_set_common(aal->regs, state, false);
0070 }
0071
0072 void mtk_aal_start(struct device *dev)
0073 {
0074     struct mtk_disp_aal *aal = dev_get_drvdata(dev);
0075
0076     writel(AAL_EN, aal->regs + DISP_AAL_EN);
0077 }
0078
0079 void mtk_aal_stop(struct device *dev)
0080 {
0081     struct mtk_disp_aal *aal = dev_get_drvdata(dev);
0082
0083     writel_relaxed(0x0, aal->regs + DISP_AAL_EN);
0084 }
0085
0086 static int mtk_disp_aal_bind(struct device *dev, struct device *master,
0087                    void *data)
0088 {
0089     return 0;
0090 }
0091
0092 static void mtk_disp_aal_unbind(struct device *dev, struct device *master,
0093                   void *data)
0094 {
0095 }
0096
0097 static const struct component_ops mtk_disp_aal_component_ops = {
0098     .bind   = mtk_disp_aal_bind,
0099     .unbind = mtk_disp_aal_unbind,
0100 };
0101
0102 static int mtk_disp_aal_probe(struct platform_device *pdev)
0103 {
0104     struct device *dev = &pdev->dev;
0105     struct mtk_disp_aal *priv;
0106     struct resource *res;
0107     int ret;
0108
0109     priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
0110     if (!priv)
0111         return -ENOMEM;
0112
0113     priv->clk = devm_clk_get(dev, NULL);
0114     if (IS_ERR(priv->clk)) {
0115         dev_err(dev, "failed to get aal clk\n");
0116         return PTR_ERR(priv->clk);
0117     }
0118
0119     res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
0120     priv->regs = devm_ioremap_resource(dev, res);
0121     if (IS_ERR(priv->regs)) {
0122         dev_err(dev, "failed to ioremap aal\n");
0123         return PTR_ERR(priv->regs);
0124     }
0125
0126 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
0127     ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
0128     if (ret)
0129         dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
0130 #endif
0131
0132     priv->data = of_device_get_match_data(dev);
0133     platform_set_drvdata(pdev, priv);
0134
0135     ret = component_add(dev, &mtk_disp_aal_component_ops);
0136     if (ret)
0137         dev_err(dev, "Failed to add component: %d\n", ret);
0138
0139     return ret;
0140 }
0141
0142 static int mtk_disp_aal_remove(struct platform_device *pdev)
0143 {
0144     component_del(&pdev->dev, &mtk_disp_aal_component_ops);
0145
0146     return 0;
0147 }
0148
0149 static const struct mtk_disp_aal_data mt8173_aal_driver_data = {
0150     .has_gamma = true,
0151 };
0152
0153 static const struct of_device_id mtk_disp_aal_driver_dt_match[] = {
0154     { .compatible = "mediatek,mt8173-disp-aal",
0155       .data = &mt8173_aal_driver_data},
0156     { .compatible = "mediatek,mt8183-disp-aal"},
0157     {},
0158 };
0159 MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match);
0160
0161 struct platform_driver mtk_disp_aal_driver = {
0162     .probe      = mtk_disp_aal_probe,
0163     .remove     = mtk_disp_aal_remove,
0164     .driver     = {
0165         .name   = "mediatek-disp-aal",
0166         .owner  = THIS_MODULE,
0167         .of_match_table = mtk_disp_aal_driver_dt_match,
0168     },
0169 };