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

   1 /*
   2 * Copyright (c) 2016 MediaTek Inc.
   3 * Author: Tiffany Lin <tiffany.lin@mediatek.com>
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License version 2 as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 */
  14
  15 #include <linux/clk.h>
  16 #include <linux/of_address.h>
  17 #include <linux/of_platform.h>
  18 #include <linux/pm_runtime.h>
  19 #include <soc/mediatek/smi.h>
  20
  21 #include "mtk_vcodec_enc_pm.h"
  22 #include "mtk_vcodec_util.h"
  23 #include "mtk_vpu.h"
  24
  25
  26 int mtk_vcodec_init_enc_pm(struct mtk_vcodec_dev *mtkdev)
  27 {
  28         struct device_node *node;
  29         struct platform_device *pdev;
  30         struct device *dev;
  31         struct mtk_vcodec_pm *pm;
  32         int ret = 0;
  33
  34         pdev = mtkdev->plat_dev;
  35         pm = &mtkdev->pm;
  36         memset(pm, 0, sizeof(struct mtk_vcodec_pm));
  37         pm->mtkdev = mtkdev;
  38         pm->dev = &pdev->dev;
  39         dev = &pdev->dev;
  40
  41         node = of_parse_phandle(dev->of_node, "mediatek,larb", 0);
  42         if (!node) {
  43                 mtk_v4l2_err("no mediatek,larb found");
  44                 return -1;
  45         }
  46         pdev = of_find_device_by_node(node);
  47         if (!pdev) {
  48                 mtk_v4l2_err("no mediatek,larb device found");
  49                 return -1;
  50         }
  51         pm->larbvenc = &pdev->dev;
  52
  53         node = of_parse_phandle(dev->of_node, "mediatek,larb", 1);
  54         if (!node) {
  55                 mtk_v4l2_err("no mediatek,larb found");
  56                 return -1;
  57         }
  58
  59         pdev = of_find_device_by_node(node);
  60         if (!pdev) {
  61                 mtk_v4l2_err("no mediatek,larb device found");
  62                 return -1;
  63         }
  64
  65         pm->larbvenclt = &pdev->dev;
  66         pdev = mtkdev->plat_dev;
  67         pm->dev = &pdev->dev;
  68
  69         pm->vencpll_d2 = devm_clk_get(&pdev->dev, "venc_sel_src");
  70         if (IS_ERR(pm->vencpll_d2)) {
  71                 mtk_v4l2_err("devm_clk_get vencpll_d2 fail");
  72                 ret = PTR_ERR(pm->vencpll_d2);
  73         }
  74
  75         pm->venc_sel = devm_clk_get(&pdev->dev, "venc_sel");
  76         if (IS_ERR(pm->venc_sel)) {
  77                 mtk_v4l2_err("devm_clk_get venc_sel fail");
  78                 ret = PTR_ERR(pm->venc_sel);
  79         }
  80
  81         pm->univpll1_d2 = devm_clk_get(&pdev->dev, "venc_lt_sel_src");
  82         if (IS_ERR(pm->univpll1_d2)) {
  83                 mtk_v4l2_err("devm_clk_get univpll1_d2 fail");
  84                 ret = PTR_ERR(pm->univpll1_d2);
  85         }
  86
  87         pm->venc_lt_sel = devm_clk_get(&pdev->dev, "venc_lt_sel");
  88         if (IS_ERR(pm->venc_lt_sel)) {
  89                 mtk_v4l2_err("devm_clk_get venc_lt_sel fail");
  90                 ret = PTR_ERR(pm->venc_lt_sel);
  91         }
  92
  93         return ret;
  94 }
  95
  96 void mtk_vcodec_release_enc_pm(struct mtk_vcodec_dev *mtkdev)
  97 {
  98 }
  99
 100
 101 void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm)
 102 {
 103         int ret;
 104
 105         ret = clk_prepare_enable(pm->venc_sel);
 106         if (ret)
 107                 mtk_v4l2_err("clk_prepare_enable fail %d", ret);
 108
 109         ret = clk_set_parent(pm->venc_sel, pm->vencpll_d2);
 110         if (ret)
 111                 mtk_v4l2_err("clk_set_parent fail %d", ret);
 112
 113         ret = clk_prepare_enable(pm->venc_lt_sel);
 114         if (ret)
 115                 mtk_v4l2_err("clk_prepare_enable fail %d", ret);
 116
 117         ret = clk_set_parent(pm->venc_lt_sel, pm->univpll1_d2);
 118         if (ret)
 119                 mtk_v4l2_err("clk_set_parent fail %d", ret);
 120
 121         ret = mtk_smi_larb_get(pm->larbvenc);
 122         if (ret)
 123                 mtk_v4l2_err("mtk_smi_larb_get larb3 fail %d", ret);
 124
 125         ret = mtk_smi_larb_get(pm->larbvenclt);
 126         if (ret)
 127                 mtk_v4l2_err("mtk_smi_larb_get larb4 fail %d", ret);
 128
 129 }
 130
 131 void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm)
 132 {
 133         mtk_smi_larb_put(pm->larbvenc);
 134         mtk_smi_larb_put(pm->larbvenclt);
 135         clk_disable_unprepare(pm->venc_lt_sel);
 136         clk_disable_unprepare(pm->venc_sel);
 137 }