drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_hw.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2021 MediaTek Inc.
   4  * Author: Yunfei Dong <[email protected]>
   5  */
   6
   7 #include <linux/interrupt.h>
   8 #include <linux/irq.h>
   9 #include <linux/module.h>
  10 #include <linux/of.h>
  11 #include <linux/of_device.h>
  12 #include <linux/pm_runtime.h>
  13 #include <linux/slab.h>
  14
  15 #include "mtk_vcodec_dec.h"
  16 #include "mtk_vcodec_dec_hw.h"
  17 #include "mtk_vcodec_dec_pm.h"
  18 #include "../common/mtk_vcodec_intr.h"
  19
  20 static const struct of_device_id mtk_vdec_hw_match[] = {
  21         {
  22                 .compatible = "mediatek,mtk-vcodec-lat",
  23                 .data = (void *)MTK_VDEC_LAT0,
  24         },
  25         {
  26                 .compatible = "mediatek,mtk-vcodec-core",
  27                 .data = (void *)MTK_VDEC_CORE,
  28         },
  29         {
  30                 .compatible = "mediatek,mtk-vcodec-lat-soc",
  31                 .data = (void *)MTK_VDEC_LAT_SOC,
  32         },
  33         {},
  34 };
  35 MODULE_DEVICE_TABLE(of, mtk_vdec_hw_match);
  36
  37 static int mtk_vdec_hw_prob_done(struct mtk_vcodec_dec_dev *vdec_dev)
  38 {
  39         struct platform_device *pdev = vdec_dev->plat_dev;
  40         struct device_node *subdev_node;
  41         enum mtk_vdec_hw_id hw_idx;
  42         const struct of_device_id *of_id;
  43         int i;
  44
  45         for (i = 0; i < ARRAY_SIZE(mtk_vdec_hw_match); i++) {
  46                 of_id = &mtk_vdec_hw_match[i];
  47                 subdev_node = of_find_compatible_node(NULL, NULL,
  48                                                       of_id->compatible);
  49                 if (!subdev_node)
  50                         continue;
  51
  52                 of_node_put(subdev_node);
  53
  54                 hw_idx = (enum mtk_vdec_hw_id)(uintptr_t)of_id->data;
  55                 if (!test_bit(hw_idx, vdec_dev->subdev_bitmap)) {
  56                         dev_err(&pdev->dev, "vdec %d is not ready", hw_idx);
  57                         return -EAGAIN;
  58                 }
  59         }
  60
  61         return 0;
  62 }
  63
  64 static irqreturn_t mtk_vdec_hw_irq_handler(int irq, void *priv)
  65 {
  66         struct mtk_vdec_hw_dev *dev = priv;
  67         struct mtk_vcodec_dec_ctx *ctx;
  68         u32 cg_status;
  69         unsigned int dec_done_status;
  70         void __iomem *vdec_misc_addr = dev->reg_base[VDEC_HW_MISC] +
  71                                         VDEC_IRQ_CFG_REG;
  72
  73         ctx = mtk_vcodec_get_curr_ctx(dev->main_dev, dev->hw_idx);
  74
  75         /* check if HW active or not */
  76         cg_status = readl(dev->reg_base[VDEC_HW_SYS] + VDEC_HW_ACTIVE_ADDR);
  77         if (cg_status & VDEC_HW_ACTIVE_MASK) {
  78                 mtk_v4l2_vdec_err(ctx, "vdec active is not 0x0 (0x%08x)", cg_status);
  79                 return IRQ_HANDLED;
  80         }
  81
  82         dec_done_status = readl(vdec_misc_addr);
  83         if ((dec_done_status & MTK_VDEC_IRQ_STATUS_DEC_SUCCESS) !=
  84             MTK_VDEC_IRQ_STATUS_DEC_SUCCESS)
  85                 return IRQ_HANDLED;
  86
  87         /* clear interrupt */
  88         writel(dec_done_status | VDEC_IRQ_CFG, vdec_misc_addr);
  89         writel(dec_done_status & ~VDEC_IRQ_CLR, vdec_misc_addr);
  90
  91         wake_up_dec_ctx(ctx, MTK_INST_IRQ_RECEIVED, dev->hw_idx);
  92
  93         mtk_v4l2_vdec_dbg(3, ctx, "wake up ctx %d, dec_done_status=%x",
  94                           ctx->id, dec_done_status);
  95
  96         return IRQ_HANDLED;
  97 }
  98
  99 static int mtk_vdec_hw_init_irq(struct mtk_vdec_hw_dev *dev)
 100 {
 101         struct platform_device *pdev = dev->plat_dev;
 102         int ret;
 103
 104         dev->dec_irq = platform_get_irq(pdev, 0);
 105         if (dev->dec_irq < 0)
 106                 return dev->dec_irq;
 107
 108         irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN);
 109         ret = devm_request_irq(&pdev->dev, dev->dec_irq,
 110                                mtk_vdec_hw_irq_handler, 0, pdev->name, dev);
 111         if (ret) {
 112                 dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
 113                         dev->dec_irq, ret);
 114                 return ret;
 115         }
 116
 117         return 0;
 118 }
 119
 120 static int mtk_vdec_hw_probe(struct platform_device *pdev)
 121 {
 122         struct device *dev = &pdev->dev;
 123         struct mtk_vdec_hw_dev *subdev_dev;
 124         struct mtk_vcodec_dec_dev *main_dev;
 125         const struct of_device_id *of_id;
 126         int hw_idx;
 127         int ret;
 128
 129         if (!dev->parent) {
 130                 dev_err(dev, "no parent for hardware devices.\n");
 131                 return -ENODEV;
 132         }
 133
 134         main_dev = dev_get_drvdata(dev->parent);
 135         if (!main_dev) {
 136                 dev_err(dev, "failed to get parent driver data");
 137                 return -EINVAL;
 138         }
 139
 140         subdev_dev = devm_kzalloc(dev, sizeof(*subdev_dev), GFP_KERNEL);
 141         if (!subdev_dev)
 142                 return -ENOMEM;
 143
 144         subdev_dev->plat_dev = pdev;
 145         ret = mtk_vcodec_init_dec_clk(pdev, &subdev_dev->pm);
 146         if (ret)
 147                 return ret;
 148
 149         ret = devm_pm_runtime_enable(&pdev->dev);
 150         if (ret)
 151                 return ret;
 152
 153         of_id = of_match_device(mtk_vdec_hw_match, dev);
 154         if (!of_id) {
 155                 dev_err(dev, "Can't get vdec subdev id.\n");
 156                 return -EINVAL;
 157         }
 158
 159         hw_idx = (enum mtk_vdec_hw_id)(uintptr_t)of_id->data;
 160         if (hw_idx >= MTK_VDEC_HW_MAX) {
 161                 dev_err(dev, "Hardware index %d not correct.\n", hw_idx);
 162                 return -EINVAL;
 163         }
 164
 165         main_dev->subdev_dev[hw_idx] = subdev_dev;
 166         subdev_dev->hw_idx = hw_idx;
 167         subdev_dev->main_dev = main_dev;
 168         subdev_dev->reg_base[VDEC_HW_SYS] = main_dev->reg_base[VDEC_HW_SYS];
 169         set_bit(subdev_dev->hw_idx, main_dev->subdev_bitmap);
 170
 171         if (IS_SUPPORT_VDEC_HW_IRQ(hw_idx)) {
 172                 ret = mtk_vdec_hw_init_irq(subdev_dev);
 173                 if (ret)
 174                         return ret;
 175         }
 176
 177         subdev_dev->reg_base[VDEC_HW_MISC] =
 178                 devm_platform_ioremap_resource(pdev, 0);
 179         if (IS_ERR((__force void *)subdev_dev->reg_base[VDEC_HW_MISC])) {
 180                 ret = PTR_ERR((__force void *)subdev_dev->reg_base[VDEC_HW_MISC]);
 181                 return ret;
 182         }
 183
 184         if (!main_dev->subdev_prob_done)
 185                 main_dev->subdev_prob_done = mtk_vdec_hw_prob_done;
 186
 187         platform_set_drvdata(pdev, subdev_dev);
 188         return 0;
 189 }
 190
 191 static struct platform_driver mtk_vdec_driver = {
 192         .probe  = mtk_vdec_hw_probe,
 193         .driver = {
 194                 .name   = "mtk-vdec-comp",
 195                 .of_match_table = mtk_vdec_hw_match,
 196         },
 197 };
 198 module_platform_driver(mtk_vdec_driver);
 199
 200 MODULE_LICENSE("GPL v2");
 201 MODULE_DESCRIPTION("Mediatek video decoder hardware driver");