drivers/gpu/drm/mediatek/mtk_disp_aal.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_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_AAL_EN                             0x0000
  19 #define AAL_EN                                          BIT(0)
  20 #define DISP_AAL_SIZE                           0x0030
  21 #define DISP_AAL_OUTPUT_SIZE                    0x04d8
  22
  23
  24 struct mtk_disp_aal_data {
  25         bool has_gamma;
  26 };
  27
  28 /**
  29  * struct mtk_disp_aal - DISP_AAL driver structure
  30  * @ddp_comp - structure containing type enum and hardware resources
  31  * @crtc - associated crtc to report irq events to
  32  */
  33 struct mtk_disp_aal {
  34         struct clk *clk;
  35         void __iomem *regs;
  36         struct cmdq_client_reg cmdq_reg;
  37         const struct mtk_disp_aal_data *data;
  38 };
  39
  40 int mtk_aal_clk_enable(struct device *dev)
  41 {
  42         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  43
  44         return clk_prepare_enable(aal->clk);
  45 }
  46
  47 void mtk_aal_clk_disable(struct device *dev)
  48 {
  49         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  50
  51         clk_disable_unprepare(aal->clk);
  52 }
  53
  54 void mtk_aal_config(struct device *dev, unsigned int w,
  55                            unsigned int h, unsigned int vrefresh,
  56                            unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
  57 {
  58         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  59
  60         mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE);
  61         mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE);
  62 }
  63
  64 void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
  65 {
  66         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  67
  68         if (aal->data && aal->data->has_gamma)
  69                 mtk_gamma_set_common(aal->regs, state);
  70 }
  71
  72 void mtk_aal_start(struct device *dev)
  73 {
  74         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  75
  76         writel(AAL_EN, aal->regs + DISP_AAL_EN);
  77 }
  78
  79 void mtk_aal_stop(struct device *dev)
  80 {
  81         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  82
  83         writel_relaxed(0x0, aal->regs + DISP_AAL_EN);
  84 }
  85
  86 static int mtk_disp_aal_bind(struct device *dev, struct device *master,
  87                                void *data)
  88 {
  89         return 0;
  90 }
  91
  92 static void mtk_disp_aal_unbind(struct device *dev, struct device *master,
  93                                   void *data)
  94 {
  95 }
  96
  97 static const struct component_ops mtk_disp_aal_component_ops = {
  98         .bind   = mtk_disp_aal_bind,
  99         .unbind = mtk_disp_aal_unbind,
 100 };
 101
 102 static int mtk_disp_aal_probe(struct platform_device *pdev)
 103 {
 104         struct device *dev = &pdev->dev;
 105         struct mtk_disp_aal *priv;
 106         struct resource *res;
 107         int ret;
 108
 109         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 110         if (!priv)
 111                 return -ENOMEM;
 112
 113         priv->clk = devm_clk_get(dev, NULL);
 114         if (IS_ERR(priv->clk)) {
 115                 dev_err(dev, "failed to get aal clk\n");
 116                 return PTR_ERR(priv->clk);
 117         }
 118
 119         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 120         priv->regs = devm_ioremap_resource(dev, res);
 121         if (IS_ERR(priv->regs)) {
 122                 dev_err(dev, "failed to ioremap aal\n");
 123                 return PTR_ERR(priv->regs);
 124         }
 125
 126 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 127         ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
 128         if (ret)
 129                 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
 130 #endif
 131
 132         priv->data = of_device_get_match_data(dev);
 133         platform_set_drvdata(pdev, priv);
 134
 135         ret = component_add(dev, &mtk_disp_aal_component_ops);
 136         if (ret)
 137                 dev_err(dev, "Failed to add component: %d\n", ret);
 138
 139         return ret;
 140 }
 141
 142 static int mtk_disp_aal_remove(struct platform_device *pdev)
 143 {
 144         component_del(&pdev->dev, &mtk_disp_aal_component_ops);
 145
 146         return 0;
 147 }
 148
 149 static const struct mtk_disp_aal_data mt8173_aal_driver_data = {
 150         .has_gamma = true,
 151 };
 152
 153 static const struct of_device_id mtk_disp_aal_driver_dt_match[] = {
 154         { .compatible = "mediatek,mt8173-disp-aal",
 155           .data = &mt8173_aal_driver_data},
 156         { .compatible = "mediatek,mt8183-disp-aal"},
 157         {},
 158 };
 159 MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match);
 160
 161 struct platform_driver mtk_disp_aal_driver = {
 162         .probe          = mtk_disp_aal_probe,
 163         .remove         = mtk_disp_aal_remove,
 164         .driver         = {
 165                 .name   = "mediatek-disp-aal",
 166                 .owner  = THIS_MODULE,
 167                 .of_match_table = mtk_disp_aal_driver_dt_match,
 168         },
 169 };