mtk_vcodec_dec_pm.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (c) 2016 MediaTek Inc.
  4 * Author: Tiffany Lin <tiffany.lin@mediatek.com>
  5 */
  6
  7#include <linux/clk.h>
  8#include <linux/interrupt.h>
  9#include <linux/of.h>
 10#include <linux/pm_runtime.h>
 11
 12#include "mtk_vcodec_dec_hw.h"
 13#include "mtk_vcodec_dec_pm.h"
 14
 15int mtk_vcodec_init_dec_clk(struct platform_device *pdev, struct mtk_vcodec_pm *pm)
 16{
 17	struct mtk_vcodec_clk *dec_clk;
 18	struct mtk_vcodec_clk_info *clk_info;
 19	int i = 0, ret;
 20
 21	dec_clk = &pm->vdec_clk;
 22	pm->dev = &pdev->dev;
 23
 24	dec_clk->clk_num =
 25		of_property_count_strings(pdev->dev.of_node, "clock-names");
 26	if (dec_clk->clk_num > 0) {
 27		dec_clk->clk_info = devm_kcalloc(&pdev->dev,
 28			dec_clk->clk_num, sizeof(*clk_info),
 29			GFP_KERNEL);
 30		if (!dec_clk->clk_info)
 31			return -ENOMEM;
 32	} else {
 33		dev_err(&pdev->dev, "Failed to get vdec clock count");
 34		return -EINVAL;
 35	}
 36
 37	for (i = 0; i < dec_clk->clk_num; i++) {
 38		clk_info = &dec_clk->clk_info[i];
 39		ret = of_property_read_string_index(pdev->dev.of_node,
 40			"clock-names", i, &clk_info->clk_name);
 41		if (ret) {
 42			dev_err(&pdev->dev, "Failed to get clock name id = %d", i);
 43			return ret;
 44		}
 45		clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
 46			clk_info->clk_name);
 47		if (IS_ERR(clk_info->vcodec_clk)) {
 48			dev_err(&pdev->dev, "devm_clk_get (%d)%s fail", i, clk_info->clk_name);
 49			return PTR_ERR(clk_info->vcodec_clk);
 50		}
 51	}
 52
 53	return 0;
 54}
 55EXPORT_SYMBOL_GPL(mtk_vcodec_init_dec_clk);
 56
 57static int mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm)
 58{
 59	int ret;
 60
 61	ret = pm_runtime_resume_and_get(pm->dev);
 62	if (ret)
 63		dev_err(pm->dev, "pm_runtime_resume_and_get fail %d", ret);
 64
 65	return ret;
 66}
 67
 68static void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm)
 69{
 70	int ret;
 71
 72	ret = pm_runtime_put(pm->dev);
 73	if (ret && ret != -EAGAIN)
 74		dev_err(pm->dev, "pm_runtime_put fail %d", ret);
 75}
 76
 77static void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm)
 78{
 79	struct mtk_vcodec_clk *dec_clk;
 80	int ret, i;
 81
 82	dec_clk = &pm->vdec_clk;
 83	for (i = 0; i < dec_clk->clk_num; i++) {
 84		ret = clk_prepare_enable(dec_clk->clk_info[i].vcodec_clk);
 85		if (ret) {
 86			dev_err(pm->dev, "clk_prepare_enable %d %s fail %d", i,
 87				dec_clk->clk_info[i].clk_name, ret);
 88			goto error;
 89		}
 90	}
 91
 92	return;
 93error:
 94	for (i -= 1; i >= 0; i--)
 95		clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
 96}
 97
 98static void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm)
 99{
100	struct mtk_vcodec_clk *dec_clk;
101	int i;
102
103	dec_clk = &pm->vdec_clk;
104	for (i = dec_clk->clk_num - 1; i >= 0; i--)
105		clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
106}
107
108static void mtk_vcodec_dec_enable_irq(struct mtk_vcodec_dec_dev *vdec_dev, int hw_idx)
109{
110	struct mtk_vdec_hw_dev *subdev_dev;
111
112	if (!test_bit(hw_idx, vdec_dev->subdev_bitmap))
113		return;
114
115	if (vdec_dev->vdec_pdata->is_subdev_supported) {
116		subdev_dev = mtk_vcodec_get_hw_dev(vdec_dev, hw_idx);
117		if (subdev_dev)
118			enable_irq(subdev_dev->dec_irq);
119		else
120			dev_err(&vdec_dev->plat_dev->dev, "Failed to get hw dev\n");
121	} else {
122		enable_irq(vdec_dev->dec_irq);
123	}
124}
125
126static void mtk_vcodec_dec_disable_irq(struct mtk_vcodec_dec_dev *vdec_dev, int hw_idx)
127{
128	struct mtk_vdec_hw_dev *subdev_dev;
129
130	if (!test_bit(hw_idx, vdec_dev->subdev_bitmap))
131		return;
132
133	if (vdec_dev->vdec_pdata->is_subdev_supported) {
134		subdev_dev = mtk_vcodec_get_hw_dev(vdec_dev, hw_idx);
135		if (subdev_dev)
136			disable_irq(subdev_dev->dec_irq);
137		else
138			dev_err(&vdec_dev->plat_dev->dev, "Failed to get hw dev\n");
139	} else {
140		disable_irq(vdec_dev->dec_irq);
141	}
142}
143
144static void mtk_vcodec_load_racing_info(struct mtk_vcodec_dec_ctx *ctx)
145{
146	void __iomem *vdec_racing_addr;
147	int j;
148
149	mutex_lock(&ctx->dev->dec_racing_info_mutex);
150	if (atomic_inc_return(&ctx->dev->dec_active_cnt) == 1) {
151		vdec_racing_addr = ctx->dev->reg_base[VDEC_MISC] + 0x100;
152		for (j = 0; j < 132; j++)
153			writel(ctx->dev->vdec_racing_info[j], vdec_racing_addr + j * 4);
154	}
155	mutex_unlock(&ctx->dev->dec_racing_info_mutex);
156}
157
158static void mtk_vcodec_record_racing_info(struct mtk_vcodec_dec_ctx *ctx)
159{
160	void __iomem *vdec_racing_addr;
161	int j;
162
163	mutex_lock(&ctx->dev->dec_racing_info_mutex);
164	if (atomic_dec_and_test(&ctx->dev->dec_active_cnt)) {
165		vdec_racing_addr = ctx->dev->reg_base[VDEC_MISC] + 0x100;
166		for (j = 0; j < 132; j++)
167			ctx->dev->vdec_racing_info[j] = readl(vdec_racing_addr + j * 4);
168	}
169	mutex_unlock(&ctx->dev->dec_racing_info_mutex);
170}
171
172static struct mtk_vcodec_pm *mtk_vcodec_dec_get_pm(struct mtk_vcodec_dec_dev *vdec_dev,
173						   int hw_idx)
174{
175	struct mtk_vdec_hw_dev *subdev_dev;
176
177	if (!test_bit(hw_idx, vdec_dev->subdev_bitmap))
178		return NULL;
179
180	if (vdec_dev->vdec_pdata->is_subdev_supported) {
181		subdev_dev = mtk_vcodec_get_hw_dev(vdec_dev, hw_idx);
182		if (subdev_dev)
183			return &subdev_dev->pm;
184
185		dev_err(&vdec_dev->plat_dev->dev, "Failed to get hw dev\n");
186		return NULL;
187	}
188
189	return &vdec_dev->pm;
190}
191
192static void mtk_vcodec_dec_child_dev_on(struct mtk_vcodec_dec_dev *vdec_dev,
193					int hw_idx)
194{
195	struct mtk_vcodec_pm *pm;
196
197	pm = mtk_vcodec_dec_get_pm(vdec_dev, hw_idx);
198	if (pm) {
199		mtk_vcodec_dec_pw_on(pm);
200		mtk_vcodec_dec_clock_on(pm);
201	}
202
203	if (hw_idx == MTK_VDEC_LAT0) {
204		pm = mtk_vcodec_dec_get_pm(vdec_dev, MTK_VDEC_LAT_SOC);
205		if (pm) {
206			mtk_vcodec_dec_pw_on(pm);
207			mtk_vcodec_dec_clock_on(pm);
208		}
209	}
210}
211
212static void mtk_vcodec_dec_child_dev_off(struct mtk_vcodec_dec_dev *vdec_dev,
213					 int hw_idx)
214{
215	struct mtk_vcodec_pm *pm;
216
217	pm = mtk_vcodec_dec_get_pm(vdec_dev, hw_idx);
218	if (pm) {
219		mtk_vcodec_dec_clock_off(pm);
220		mtk_vcodec_dec_pw_off(pm);
221	}
222
223	if (hw_idx == MTK_VDEC_LAT0) {
224		pm = mtk_vcodec_dec_get_pm(vdec_dev, MTK_VDEC_LAT_SOC);
225		if (pm) {
226			mtk_vcodec_dec_clock_off(pm);
227			mtk_vcodec_dec_pw_off(pm);
228		}
229	}
230}
231
232void mtk_vcodec_dec_enable_hardware(struct mtk_vcodec_dec_ctx *ctx, int hw_idx)
233{
234	mutex_lock(&ctx->dev->dec_mutex[hw_idx]);
235
236	if (IS_VDEC_LAT_ARCH(ctx->dev->vdec_pdata->hw_arch) &&
237	    hw_idx == MTK_VDEC_CORE)
238		mtk_vcodec_dec_child_dev_on(ctx->dev, MTK_VDEC_LAT0);
239	mtk_vcodec_dec_child_dev_on(ctx->dev, hw_idx);
240
241	mtk_vcodec_dec_enable_irq(ctx->dev, hw_idx);
242
243	if (IS_VDEC_INNER_RACING(ctx->dev->dec_capability))
244		mtk_vcodec_load_racing_info(ctx);
245}
246EXPORT_SYMBOL_GPL(mtk_vcodec_dec_enable_hardware);
247
248void mtk_vcodec_dec_disable_hardware(struct mtk_vcodec_dec_ctx *ctx, int hw_idx)
249{
250	if (IS_VDEC_INNER_RACING(ctx->dev->dec_capability))
251		mtk_vcodec_record_racing_info(ctx);
252
253	mtk_vcodec_dec_disable_irq(ctx->dev, hw_idx);
254
255	mtk_vcodec_dec_child_dev_off(ctx->dev, hw_idx);
256	if (IS_VDEC_LAT_ARCH(ctx->dev->vdec_pdata->hw_arch) &&
257	    hw_idx == MTK_VDEC_CORE)
258		mtk_vcodec_dec_child_dev_off(ctx->dev, MTK_VDEC_LAT0);
259
260	mutex_unlock(&ctx->dev->dec_mutex[hw_idx]);
261}
262EXPORT_SYMBOL_GPL(mtk_vcodec_dec_disable_hardware);