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 #include "mtk_drm_drv.h"
  18
  19 #define DISP_AAL_EN                             0x0000
  20 #define AAL_EN                                          BIT(0)
  21 #define DISP_AAL_SIZE                           0x0030
  22 #define DISP_AAL_OUTPUT_SIZE                    0x04d8
  23
  24
  25 struct mtk_disp_aal_data {
  26         bool has_gamma;
  27 };
  28
  29 /**
  30  * struct mtk_disp_aal - DISP_AAL driver structure
  31  * @ddp_comp - structure containing type enum and hardware resources
  32  * @crtc - associated crtc to report irq events to
  33  */
  34 struct mtk_disp_aal {
  35         struct clk *clk;
  36         void __iomem *regs;
  37         struct cmdq_client_reg cmdq_reg;
  38         const struct mtk_disp_aal_data *data;
  39 };
  40
  41 int mtk_aal_clk_enable(struct device *dev)
  42 {
  43         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  44
  45         return clk_prepare_enable(aal->clk);
  46 }
  47
  48 void mtk_aal_clk_disable(struct device *dev)
  49 {
  50         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  51
  52         clk_disable_unprepare(aal->clk);
  53 }
  54
  55 void mtk_aal_config(struct device *dev, unsigned int w,
  56                            unsigned int h, unsigned int vrefresh,
  57                            unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
  58 {
  59         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  60
  61         mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE);
  62         mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE);
  63 }
  64
  65 void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
  66 {
  67         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  68
  69         if (aal->data && aal->data->has_gamma)
  70                 mtk_gamma_set_common(aal->regs, state, false);
  71 }
  72
  73 void mtk_aal_start(struct device *dev)
  74 {
  75         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  76
  77         writel(AAL_EN, aal->regs + DISP_AAL_EN);
  78 }
  79
  80 void mtk_aal_stop(struct device *dev)
  81 {
  82         struct mtk_disp_aal *aal = dev_get_drvdata(dev);
  83
  84         writel_relaxed(0x0, aal->regs + DISP_AAL_EN);
  85 }
  86
  87 static int mtk_disp_aal_bind(struct device *dev, struct device *master,
  88                                void *data)
  89 {
  90         return 0;
  91 }
  92
  93 static void mtk_disp_aal_unbind(struct device *dev, struct device *master,
  94                                   void *data)
  95 {
  96 }
  97
  98 static const struct component_ops mtk_disp_aal_component_ops = {
  99         .bind   = mtk_disp_aal_bind,
 100         .unbind = mtk_disp_aal_unbind,
 101 };
 102
 103 static int mtk_disp_aal_probe(struct platform_device *pdev)
 104 {
 105         struct device *dev = &pdev->dev;
 106         struct mtk_disp_aal *priv;
 107         struct resource *res;
 108         int ret;
 109
 110         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 111         if (!priv)
 112                 return -ENOMEM;
 113
 114         priv->clk = devm_clk_get(dev, NULL);
 115         if (IS_ERR(priv->clk)) {
 116                 dev_err(dev, "failed to get aal clk\n");
 117                 return PTR_ERR(priv->clk);
 118         }
 119
 120         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 121         priv->regs = devm_ioremap_resource(dev, res);
 122         if (IS_ERR(priv->regs)) {
 123                 dev_err(dev, "failed to ioremap aal\n");
 124                 return PTR_ERR(priv->regs);
 125         }
 126
 127 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 128         ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
 129         if (ret)
 130                 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
 131 #endif
 132
 133         priv->data = of_device_get_match_data(dev);
 134         platform_set_drvdata(pdev, priv);
 135
 136         ret = component_add(dev, &mtk_disp_aal_component_ops);
 137         if (ret)
 138                 dev_err(dev, "Failed to add component: %d\n", ret);
 139
 140         return ret;
 141 }
 142
 143 static int mtk_disp_aal_remove(struct platform_device *pdev)
 144 {
 145         component_del(&pdev->dev, &mtk_disp_aal_component_ops);
 146
 147         return 0;
 148 }
 149
 150 static const struct mtk_disp_aal_data mt8173_aal_driver_data = {
 151         .has_gamma = true,
 152 };
 153
 154 static const struct of_device_id mtk_disp_aal_driver_dt_match[] = {
 155         { .compatible = "mediatek,mt8173-disp-aal",
 156           .data = &mt8173_aal_driver_data},
 157         { .compatible = "mediatek,mt8183-disp-aal"},
 158         {},
 159 };
 160 MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match);
 161
 162 struct platform_driver mtk_disp_aal_driver = {
 163         .probe          = mtk_disp_aal_probe,
 164         .remove         = mtk_disp_aal_remove,
 165         .driver         = {
 166                 .name   = "mediatek-disp-aal",
 167                 .owner  = THIS_MODULE,
 168                 .of_match_table = mtk_disp_aal_driver_dt_match,
 169         },
 170 };