| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (c) 2016 MediaTek Inc. |
| * Author: Tiffany Lin <tiffany.lin@mediatek.com> |
| */ |
| |
| #include <linux/clk.h> |
| #include <linux/of_address.h> |
| #include <linux/of_platform.h> |
| #include <linux/pm_runtime.h> |
| #include <soc/mediatek/smi.h> |
| |
| #include "mtk_vcodec_enc_pm.h" |
| #include "mtk_vcodec_util.h" |
| |
| int mtk_vcodec_init_enc_pm(struct mtk_vcodec_dev *mtkdev) |
| { |
| struct device_node *node; |
| struct platform_device *pdev; |
| struct mtk_vcodec_pm *pm; |
| struct mtk_vcodec_clk *enc_clk; |
| struct mtk_vcodec_clk_info *clk_info; |
| int ret = 0, i = 0; |
| struct device *dev; |
| |
| pdev = mtkdev->plat_dev; |
| pm = &mtkdev->pm; |
| memset(pm, 0, sizeof(struct mtk_vcodec_pm)); |
| pm->mtkdev = mtkdev; |
| pm->dev = &pdev->dev; |
| dev = &pdev->dev; |
| enc_clk = &pm->venc_clk; |
| |
| node = of_parse_phandle(dev->of_node, "mediatek,larb", 0); |
| if (!node) { |
| mtk_v4l2_err("no mediatek,larb found"); |
| return -ENODEV; |
| } |
| pdev = of_find_device_by_node(node); |
| of_node_put(node); |
| if (!pdev) { |
| mtk_v4l2_err("no mediatek,larb device found"); |
| return -ENODEV; |
| } |
| pm->larbvenc = &pdev->dev; |
| pdev = mtkdev->plat_dev; |
| pm->dev = &pdev->dev; |
| |
| enc_clk->clk_num = of_property_count_strings(pdev->dev.of_node, |
| "clock-names"); |
| if (enc_clk->clk_num > 0) { |
| enc_clk->clk_info = devm_kcalloc(&pdev->dev, |
| enc_clk->clk_num, sizeof(*clk_info), |
| GFP_KERNEL); |
| if (!enc_clk->clk_info) { |
| ret = -ENOMEM; |
| goto put_larbvenc; |
| } |
| } else { |
| mtk_v4l2_err("Failed to get venc clock count"); |
| ret = -EINVAL; |
| goto put_larbvenc; |
| } |
| |
| for (i = 0; i < enc_clk->clk_num; i++) { |
| clk_info = &enc_clk->clk_info[i]; |
| ret = of_property_read_string_index(pdev->dev.of_node, |
| "clock-names", i, &clk_info->clk_name); |
| if (ret) { |
| mtk_v4l2_err("venc failed to get clk name %d", i); |
| goto put_larbvenc; |
| } |
| clk_info->vcodec_clk = devm_clk_get(&pdev->dev, |
| clk_info->clk_name); |
| if (IS_ERR(clk_info->vcodec_clk)) { |
| mtk_v4l2_err("venc devm_clk_get (%d)%s fail", i, |
| clk_info->clk_name); |
| ret = PTR_ERR(clk_info->vcodec_clk); |
| goto put_larbvenc; |
| } |
| } |
| |
| return 0; |
| |
| put_larbvenc: |
| put_device(pm->larbvenc); |
| return ret; |
| } |
| |
| void mtk_vcodec_release_enc_pm(struct mtk_vcodec_dev *mtkdev) |
| { |
| pm_runtime_disable(mtkdev->pm.dev); |
| put_device(mtkdev->pm.larbvenc); |
| } |
| |
| |
| void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm) |
| { |
| struct mtk_vcodec_clk *enc_clk = &pm->venc_clk; |
| int ret, i = 0; |
| |
| for (i = 0; i < enc_clk->clk_num; i++) { |
| ret = clk_prepare_enable(enc_clk->clk_info[i].vcodec_clk); |
| if (ret) { |
| mtk_v4l2_err("venc clk_prepare_enable %d %s fail %d", i, |
| enc_clk->clk_info[i].clk_name, ret); |
| goto clkerr; |
| } |
| } |
| |
| ret = mtk_smi_larb_get(pm->larbvenc); |
| if (ret) { |
| mtk_v4l2_err("mtk_smi_larb_get larb3 fail %d", ret); |
| goto clkerr; |
| } |
| return; |
| |
| clkerr: |
| for (i -= 1; i >= 0; i--) |
| clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk); |
| } |
| |
| void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm) |
| { |
| struct mtk_vcodec_clk *enc_clk = &pm->venc_clk; |
| int i = 0; |
| |
| mtk_smi_larb_put(pm->larbvenc); |
| for (i = enc_clk->clk_num - 1; i >= 0; i--) |
| clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk); |
| } |