mtk_vcodec_dec_hw.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (c) 2021 MediaTek Inc.
  4 * Author: Yunfei Dong <yunfei.dong@mediatek.com>
  5 */
  6
  7#include <linux/interrupt.h>
  8#include <linux/irq.h>
  9#include <linux/module.h>
 10#include <linux/of.h>
 11#include <linux/of_device.h>
 12#include <linux/pm_runtime.h>
 13#include <linux/slab.h>
 14
 15#include "mtk_vcodec_dec.h"
 16#include "mtk_vcodec_dec_hw.h"
 17#include "mtk_vcodec_dec_pm.h"
 18#include "../common/mtk_vcodec_intr.h"
 19
 20static const struct of_device_id mtk_vdec_hw_match[] = {
 21	{
 22		.compatible = "mediatek,mtk-vcodec-lat",
 23		.data = (void *)MTK_VDEC_LAT0,
 24	},
 25	{
 26		.compatible = "mediatek,mtk-vcodec-core",
 27		.data = (void *)MTK_VDEC_CORE,
 28	},
 29	{
 30		.compatible = "mediatek,mtk-vcodec-lat-soc",
 31		.data = (void *)MTK_VDEC_LAT_SOC,
 32	},
 33	{},
 34};
 35MODULE_DEVICE_TABLE(of, mtk_vdec_hw_match);
 36
 37static int mtk_vdec_hw_prob_done(struct mtk_vcodec_dec_dev *vdec_dev)
 38{
 39	struct platform_device *pdev = vdec_dev->plat_dev;
 40	struct device_node *subdev_node;
 41	enum mtk_vdec_hw_id hw_idx;
 42	const struct of_device_id *of_id;
 43	int i;
 44
 45	for (i = 0; i < ARRAY_SIZE(mtk_vdec_hw_match); i++) {
 46		of_id = &mtk_vdec_hw_match[i];
 47		subdev_node = of_find_compatible_node(NULL, NULL,
 48						      of_id->compatible);
 49		if (!subdev_node)
 50			continue;
 51
 52		of_node_put(subdev_node);
 53
 54		hw_idx = (enum mtk_vdec_hw_id)(uintptr_t)of_id->data;
 55		if (!test_bit(hw_idx, vdec_dev->subdev_bitmap)) {
 56			dev_err(&pdev->dev, "vdec %d is not ready", hw_idx);
 57			return -EAGAIN;
 58		}
 59	}
 60
 61	return 0;
 62}
 63
 64static irqreturn_t mtk_vdec_hw_irq_handler(int irq, void *priv)
 65{
 66	struct mtk_vdec_hw_dev *dev = priv;
 67	struct mtk_vcodec_dec_ctx *ctx;
 68	u32 cg_status;
 69	unsigned int dec_done_status;
 70	void __iomem *vdec_misc_addr = dev->reg_base[VDEC_HW_MISC] +
 71					VDEC_IRQ_CFG_REG;
 72
 73	ctx = mtk_vcodec_get_curr_ctx(dev->main_dev, dev->hw_idx);
 74
 75	/* check if HW active or not */
 76	cg_status = readl(dev->reg_base[VDEC_HW_SYS] + VDEC_HW_ACTIVE_ADDR);
 77	if (cg_status & VDEC_HW_ACTIVE_MASK) {
 78		mtk_v4l2_vdec_err(ctx, "vdec active is not 0x0 (0x%08x)", cg_status);
 79		return IRQ_HANDLED;
 80	}
 81
 82	dec_done_status = readl(vdec_misc_addr);
 83	if ((dec_done_status & MTK_VDEC_IRQ_STATUS_DEC_SUCCESS) !=
 84	    MTK_VDEC_IRQ_STATUS_DEC_SUCCESS)
 85		return IRQ_HANDLED;
 86
 87	/* clear interrupt */
 88	writel(dec_done_status | VDEC_IRQ_CFG, vdec_misc_addr);
 89	writel(dec_done_status & ~VDEC_IRQ_CLR, vdec_misc_addr);
 90
 91	wake_up_dec_ctx(ctx, MTK_INST_IRQ_RECEIVED, dev->hw_idx);
 92
 93	mtk_v4l2_vdec_dbg(3, ctx, "wake up ctx %d, dec_done_status=%x",
 94			  ctx->id, dec_done_status);
 95
 96	return IRQ_HANDLED;
 97}
 98
 99static int mtk_vdec_hw_init_irq(struct mtk_vdec_hw_dev *dev)
100{
101	struct platform_device *pdev = dev->plat_dev;
102	int ret;
103
104	dev->dec_irq = platform_get_irq(pdev, 0);
105	if (dev->dec_irq < 0)
106		return dev->dec_irq;
107
108	irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN);
109	ret = devm_request_irq(&pdev->dev, dev->dec_irq,
110			       mtk_vdec_hw_irq_handler, 0, pdev->name, dev);
111	if (ret) {
112		dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
113			dev->dec_irq, ret);
114		return ret;
115	}
116
117	return 0;
118}
119
120static int mtk_vdec_hw_probe(struct platform_device *pdev)
121{
122	struct device *dev = &pdev->dev;
123	struct mtk_vdec_hw_dev *subdev_dev;
124	struct mtk_vcodec_dec_dev *main_dev;
125	const struct of_device_id *of_id;
126	int hw_idx;
127	int ret;
128
129	if (!dev->parent) {
130		dev_err(dev, "no parent for hardware devices.\n");
131		return -ENODEV;
132	}
133
134	main_dev = dev_get_drvdata(dev->parent);
135	if (!main_dev) {
136		dev_err(dev, "failed to get parent driver data");
137		return -EINVAL;
138	}
139
140	subdev_dev = devm_kzalloc(dev, sizeof(*subdev_dev), GFP_KERNEL);
141	if (!subdev_dev)
142		return -ENOMEM;
143
144	subdev_dev->plat_dev = pdev;
145	ret = mtk_vcodec_init_dec_clk(pdev, &subdev_dev->pm);
146	if (ret)
147		return ret;
148
149	ret = devm_pm_runtime_enable(&pdev->dev);
150	if (ret)
151		return ret;
152
153	of_id = of_match_device(mtk_vdec_hw_match, dev);
154	if (!of_id) {
155		dev_err(dev, "Can't get vdec subdev id.\n");
156		return -EINVAL;
157	}
158
159	hw_idx = (enum mtk_vdec_hw_id)(uintptr_t)of_id->data;
160	if (hw_idx >= MTK_VDEC_HW_MAX) {
161		dev_err(dev, "Hardware index %d not correct.\n", hw_idx);
162		return -EINVAL;
163	}
164
165	main_dev->subdev_dev[hw_idx] = subdev_dev;
166	subdev_dev->hw_idx = hw_idx;
167	subdev_dev->main_dev = main_dev;
168	subdev_dev->reg_base[VDEC_HW_SYS] = main_dev->reg_base[VDEC_HW_SYS];
169	set_bit(subdev_dev->hw_idx, main_dev->subdev_bitmap);
170
171	if (IS_SUPPORT_VDEC_HW_IRQ(hw_idx)) {
172		ret = mtk_vdec_hw_init_irq(subdev_dev);
173		if (ret)
174			return ret;
175	}
176
177	subdev_dev->reg_base[VDEC_HW_MISC] =
178		devm_platform_ioremap_resource(pdev, 0);
179	if (IS_ERR((__force void *)subdev_dev->reg_base[VDEC_HW_MISC])) {
180		ret = PTR_ERR((__force void *)subdev_dev->reg_base[VDEC_HW_MISC]);
181		return ret;
182	}
183
184	if (!main_dev->subdev_prob_done)
185		main_dev->subdev_prob_done = mtk_vdec_hw_prob_done;
186
187	platform_set_drvdata(pdev, subdev_dev);
188	return 0;
189}
190
191static struct platform_driver mtk_vdec_driver = {
192	.probe	= mtk_vdec_hw_probe,
193	.driver	= {
194		.name	= "mtk-vdec-comp",
195		.of_match_table = mtk_vdec_hw_match,
196	},
197};
198module_platform_driver(mtk_vdec_driver);
199
200MODULE_LICENSE("GPL v2");
201MODULE_DESCRIPTION("Mediatek video decoder hardware driver");