drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2016 MediaTek Inc.
   4  * Author: Tiffany Lin <tiffany.lin@mediatek.com>
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/of_address.h>
   9 #include <linux/of_platform.h>
  10 #include <linux/pm_runtime.h>
  11 #include <soc/mediatek/smi.h>
  12
  13 #include "mtk_vcodec_dec_pm.h"
  14 #include "mtk_vcodec_util.h"
  15 #include "mtk_vpu.h"
  16
  17 int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
  18 {
  19         struct device_node *node;
  20         struct platform_device *pdev;
  21         struct mtk_vcodec_pm *pm;
  22         struct mtk_vcodec_clk *dec_clk;
  23         struct mtk_vcodec_clk_info *clk_info;
  24         int i = 0, ret = 0;
  25
  26         pdev = mtkdev->plat_dev;
  27         pm = &mtkdev->pm;
  28         pm->mtkdev = mtkdev;
  29         dec_clk = &pm->vdec_clk;
  30         node = of_parse_phandle(pdev->dev.of_node, "mediatek,larb", 0);
  31         if (!node) {
  32                 mtk_v4l2_err("of_parse_phandle mediatek,larb fail!");
  33                 return -1;
  34         }
  35
  36         pdev = of_find_device_by_node(node);
  37         of_node_put(node);
  38         if (WARN_ON(!pdev)) {
  39                 return -1;
  40         }
  41         pm->larbvdec = &pdev->dev;
  42         pdev = mtkdev->plat_dev;
  43         pm->dev = &pdev->dev;
  44
  45         dec_clk->clk_num =
  46                 of_property_count_strings(pdev->dev.of_node, "clock-names");
  47         if (dec_clk->clk_num > 0) {
  48                 dec_clk->clk_info = devm_kcalloc(&pdev->dev,
  49                         dec_clk->clk_num, sizeof(*clk_info),
  50                         GFP_KERNEL);
  51                 if (!dec_clk->clk_info)
  52                         return -ENOMEM;
  53         } else {
  54                 mtk_v4l2_err("Failed to get vdec clock count");
  55                 return -EINVAL;
  56         }
  57
  58         for (i = 0; i < dec_clk->clk_num; i++) {
  59                 clk_info = &dec_clk->clk_info[i];
  60                 ret = of_property_read_string_index(pdev->dev.of_node,
  61                         "clock-names", i, &clk_info->clk_name);
  62                 if (ret) {
  63                         mtk_v4l2_err("Failed to get clock name id = %d", i);
  64                         return ret;
  65                 }
  66                 clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
  67                         clk_info->clk_name);
  68                 if (IS_ERR(clk_info->vcodec_clk)) {
  69                         mtk_v4l2_err("devm_clk_get (%d)%s fail", i,
  70                                 clk_info->clk_name);
  71                         return PTR_ERR(clk_info->vcodec_clk);
  72                 }
  73         }
  74
  75         pm_runtime_enable(&pdev->dev);
  76
  77         return ret;
  78 }
  79
  80 void mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev *dev)
  81 {
  82         pm_runtime_disable(dev->pm.dev);
  83 }
  84
  85 void mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm)
  86 {
  87         int ret;
  88
  89         ret = pm_runtime_get_sync(pm->dev);
  90         if (ret)
  91                 mtk_v4l2_err("pm_runtime_get_sync fail %d", ret);
  92 }
  93
  94 void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm)
  95 {
  96         int ret;
  97
  98         ret = pm_runtime_put_sync(pm->dev);
  99         if (ret)
 100                 mtk_v4l2_err("pm_runtime_put_sync fail %d", ret);
 101 }
 102
 103 void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm)
 104 {
 105         struct mtk_vcodec_clk *dec_clk = &pm->vdec_clk;
 106         int ret, i = 0;
 107
 108         for (i = 0; i < dec_clk->clk_num; i++) {
 109                 ret = clk_prepare_enable(dec_clk->clk_info[i].vcodec_clk);
 110                 if (ret) {
 111                         mtk_v4l2_err("clk_prepare_enable %d %s fail %d", i,
 112                                 dec_clk->clk_info[i].clk_name, ret);
 113                         goto error;
 114                 }
 115         }
 116
 117         ret = mtk_smi_larb_get(pm->larbvdec);
 118         if (ret) {
 119                 mtk_v4l2_err("mtk_smi_larb_get larbvdec fail %d", ret);
 120                 goto error;
 121         }
 122         return;
 123
 124 error:
 125         for (i -= 1; i >= 0; i--)
 126                 clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
 127 }
 128
 129 void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm)
 130 {
 131         struct mtk_vcodec_clk *dec_clk = &pm->vdec_clk;
 132         int i = 0;
 133
 134         mtk_smi_larb_put(pm->larbvdec);
 135         for (i = dec_clk->clk_num - 1; i >= 0; i--)
 136                 clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
 137 }