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117 lines
2.5 KiB
117 lines
2.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (c) 2016 MediaTek Inc. |
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* Author: Ming Hsiu Tsai <[email protected]> |
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*/ |
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#include <linux/clk.h> |
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#include <linux/device.h> |
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include <linux/of_platform.h> |
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#include <soc/mediatek/smi.h> |
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#include "mtk_mdp_comp.h" |
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void mtk_mdp_comp_clock_on(struct device *dev, struct mtk_mdp_comp *comp) |
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{ |
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int i, err; |
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if (comp->larb_dev) { |
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err = mtk_smi_larb_get(comp->larb_dev); |
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if (err) |
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dev_err(dev, |
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"failed to get larb, err %d. type:%d\n", |
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err, comp->type); |
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} |
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for (i = 0; i < ARRAY_SIZE(comp->clk); i++) { |
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if (IS_ERR(comp->clk[i])) |
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continue; |
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err = clk_prepare_enable(comp->clk[i]); |
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if (err) |
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dev_err(dev, |
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"failed to enable clock, err %d. type:%d i:%d\n", |
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err, comp->type, i); |
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} |
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} |
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void mtk_mdp_comp_clock_off(struct device *dev, struct mtk_mdp_comp *comp) |
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{ |
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int i; |
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for (i = 0; i < ARRAY_SIZE(comp->clk); i++) { |
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if (IS_ERR(comp->clk[i])) |
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continue; |
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clk_disable_unprepare(comp->clk[i]); |
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} |
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if (comp->larb_dev) |
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mtk_smi_larb_put(comp->larb_dev); |
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} |
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int mtk_mdp_comp_init(struct device *dev, struct device_node *node, |
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struct mtk_mdp_comp *comp, |
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enum mtk_mdp_comp_type comp_type) |
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{ |
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struct device_node *larb_node; |
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struct platform_device *larb_pdev; |
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int ret; |
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int i; |
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comp->dev_node = of_node_get(node); |
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comp->type = comp_type; |
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for (i = 0; i < ARRAY_SIZE(comp->clk); i++) { |
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comp->clk[i] = of_clk_get(node, i); |
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if (IS_ERR(comp->clk[i])) { |
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if (PTR_ERR(comp->clk[i]) != -EPROBE_DEFER) |
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dev_err(dev, "Failed to get clock\n"); |
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ret = PTR_ERR(comp->clk[i]); |
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goto put_dev; |
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} |
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/* Only RDMA needs two clocks */ |
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if (comp->type != MTK_MDP_RDMA) |
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break; |
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} |
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/* Only DMA capable components need the LARB property */ |
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comp->larb_dev = NULL; |
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if (comp->type != MTK_MDP_RDMA && |
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comp->type != MTK_MDP_WDMA && |
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comp->type != MTK_MDP_WROT) |
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return 0; |
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larb_node = of_parse_phandle(node, "mediatek,larb", 0); |
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if (!larb_node) { |
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dev_err(dev, |
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"Missing mediadek,larb phandle in %pOF node\n", node); |
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ret = -EINVAL; |
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goto put_dev; |
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} |
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larb_pdev = of_find_device_by_node(larb_node); |
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if (!larb_pdev) { |
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dev_warn(dev, "Waiting for larb device %pOF\n", larb_node); |
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of_node_put(larb_node); |
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ret = -EPROBE_DEFER; |
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goto put_dev; |
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} |
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of_node_put(larb_node); |
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comp->larb_dev = &larb_pdev->dev; |
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return 0; |
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put_dev: |
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of_node_put(comp->dev_node); |
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return ret; |
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} |
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void mtk_mdp_comp_deinit(struct device *dev, struct mtk_mdp_comp *comp) |
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{ |
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of_node_put(comp->dev_node); |
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}
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