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 -ENODEV;
  45         }
  46         pdev = of_find_device_by_node(node);
  47         of_node_put(node);
  48         if (!pdev) {
  49                 mtk_v4l2_err("no mediatek,larb device found");
  50                 return -ENODEV;
  51         }
  52         pm->larbvenc = &pdev->dev;
  53
  54         node = of_parse_phandle(dev->of_node, "mediatek,larb", 1);
  55         if (!node) {
  56                 mtk_v4l2_err("no mediatek,larb found");
  57                 return -ENODEV;
  58         }
  59
  60         pdev = of_find_device_by_node(node);
  61         of_node_put(node);
  62         if (!pdev) {
  63                 mtk_v4l2_err("no mediatek,larb device found");
  64                 return -ENODEV;
  65         }
  66
  67         pm->larbvenclt = &pdev->dev;
  68         pdev = mtkdev->plat_dev;
  69         pm->dev = &pdev->dev;
  70
  71         pm->vencpll_d2 = devm_clk_get(&pdev->dev, "venc_sel_src");
  72         if (IS_ERR(pm->vencpll_d2)) {
  73                 mtk_v4l2_err("devm_clk_get vencpll_d2 fail");
  74                 ret = PTR_ERR(pm->vencpll_d2);
  75         }
  76
  77         pm->venc_sel = devm_clk_get(&pdev->dev, "venc_sel");
  78         if (IS_ERR(pm->venc_sel)) {
  79                 mtk_v4l2_err("devm_clk_get venc_sel fail");
  80                 ret = PTR_ERR(pm->venc_sel);
  81         }
  82
  83         pm->univpll1_d2 = devm_clk_get(&pdev->dev, "venc_lt_sel_src");
  84         if (IS_ERR(pm->univpll1_d2)) {
  85                 mtk_v4l2_err("devm_clk_get univpll1_d2 fail");
  86                 ret = PTR_ERR(pm->univpll1_d2);
  87         }
  88
  89         pm->venc_lt_sel = devm_clk_get(&pdev->dev, "venc_lt_sel");
  90         if (IS_ERR(pm->venc_lt_sel)) {
  91                 mtk_v4l2_err("devm_clk_get venc_lt_sel fail");
  92                 ret = PTR_ERR(pm->venc_lt_sel);
  93         }
  94
  95         return ret;
  96 }
  97
  98 void mtk_vcodec_release_enc_pm(struct mtk_vcodec_dev *mtkdev)
  99 {
 100 }
 101
 102
 103 void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm)
 104 {
 105         int ret;
 106
 107         ret = clk_prepare_enable(pm->venc_sel);
 108         if (ret)
 109                 mtk_v4l2_err("clk_prepare_enable fail %d", ret);
 110
 111         ret = clk_set_parent(pm->venc_sel, pm->vencpll_d2);
 112         if (ret)
 113                 mtk_v4l2_err("clk_set_parent fail %d", ret);
 114
 115         ret = clk_prepare_enable(pm->venc_lt_sel);
 116         if (ret)
 117                 mtk_v4l2_err("clk_prepare_enable fail %d", ret);
 118
 119         ret = clk_set_parent(pm->venc_lt_sel, pm->univpll1_d2);
 120         if (ret)
 121                 mtk_v4l2_err("clk_set_parent fail %d", ret);
 122
 123         ret = mtk_smi_larb_get(pm->larbvenc);
 124         if (ret)
 125                 mtk_v4l2_err("mtk_smi_larb_get larb3 fail %d", ret);
 126
 127         ret = mtk_smi_larb_get(pm->larbvenclt);
 128         if (ret)
 129                 mtk_v4l2_err("mtk_smi_larb_get larb4 fail %d", ret);
 130
 131 }
 132
 133 void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm)
 134 {
 135         mtk_smi_larb_put(pm->larbvenc);
 136         mtk_smi_larb_put(pm->larbvenclt);
 137         clk_disable_unprepare(pm->venc_lt_sel);
 138         clk_disable_unprepare(pm->venc_sel);
 139 }