diff options
Diffstat (limited to 'drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_pm.c')
| -rw-r--r-- | drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_pm.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_pm.c b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_pm.c new file mode 100644 index 0000000000..aefd3e9e30 --- /dev/null +++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_pm.c @@ -0,0 +1,262 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2016 MediaTek Inc. + * Author: Tiffany Lin <tiffany.lin@mediatek.com> + */ + +#include <linux/clk.h> +#include <linux/interrupt.h> +#include <linux/of.h> +#include <linux/pm_runtime.h> + +#include "mtk_vcodec_dec_hw.h" +#include "mtk_vcodec_dec_pm.h" + +int mtk_vcodec_init_dec_clk(struct platform_device *pdev, struct mtk_vcodec_pm *pm) +{ + struct mtk_vcodec_clk *dec_clk; + struct mtk_vcodec_clk_info *clk_info; + int i = 0, ret; + + dec_clk = &pm->vdec_clk; + pm->dev = &pdev->dev; + + dec_clk->clk_num = + of_property_count_strings(pdev->dev.of_node, "clock-names"); + if (dec_clk->clk_num > 0) { + dec_clk->clk_info = devm_kcalloc(&pdev->dev, + dec_clk->clk_num, sizeof(*clk_info), + GFP_KERNEL); + if (!dec_clk->clk_info) + return -ENOMEM; + } else { + dev_err(&pdev->dev, "Failed to get vdec clock count"); + return -EINVAL; + } + + for (i = 0; i < dec_clk->clk_num; i++) { + clk_info = &dec_clk->clk_info[i]; + ret = of_property_read_string_index(pdev->dev.of_node, + "clock-names", i, &clk_info->clk_name); + if (ret) { + dev_err(&pdev->dev, "Failed to get clock name id = %d", i); + return ret; + } + clk_info->vcodec_clk = devm_clk_get(&pdev->dev, + clk_info->clk_name); + if (IS_ERR(clk_info->vcodec_clk)) { + dev_err(&pdev->dev, "devm_clk_get (%d)%s fail", i, clk_info->clk_name); + return PTR_ERR(clk_info->vcodec_clk); + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(mtk_vcodec_init_dec_clk); + +static int mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm) +{ + int ret; + + ret = pm_runtime_resume_and_get(pm->dev); + if (ret) + dev_err(pm->dev, "pm_runtime_resume_and_get fail %d", ret); + + return ret; +} + +static void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm) +{ + int ret; + + ret = pm_runtime_put(pm->dev); + if (ret && ret != -EAGAIN) + dev_err(pm->dev, "pm_runtime_put fail %d", ret); +} + +static void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm) +{ + struct mtk_vcodec_clk *dec_clk; + int ret, i; + + dec_clk = &pm->vdec_clk; + for (i = 0; i < dec_clk->clk_num; i++) { + ret = clk_prepare_enable(dec_clk->clk_info[i].vcodec_clk); + if (ret) { + dev_err(pm->dev, "clk_prepare_enable %d %s fail %d", i, + dec_clk->clk_info[i].clk_name, ret); + goto error; + } + } + + return; +error: + for (i -= 1; i >= 0; i--) + clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk); +} + +static void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm) +{ + struct mtk_vcodec_clk *dec_clk; + int i; + + dec_clk = &pm->vdec_clk; + for (i = dec_clk->clk_num - 1; i >= 0; i--) + clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk); +} + +static void mtk_vcodec_dec_enable_irq(struct mtk_vcodec_dec_dev *vdec_dev, int hw_idx) +{ + struct mtk_vdec_hw_dev *subdev_dev; + + if (!test_bit(hw_idx, vdec_dev->subdev_bitmap)) + return; + + if (vdec_dev->vdec_pdata->is_subdev_supported) { + subdev_dev = mtk_vcodec_get_hw_dev(vdec_dev, hw_idx); + if (subdev_dev) + enable_irq(subdev_dev->dec_irq); + else + dev_err(&vdec_dev->plat_dev->dev, "Failed to get hw dev\n"); + } else { + enable_irq(vdec_dev->dec_irq); + } +} + +static void mtk_vcodec_dec_disable_irq(struct mtk_vcodec_dec_dev *vdec_dev, int hw_idx) +{ + struct mtk_vdec_hw_dev *subdev_dev; + + if (!test_bit(hw_idx, vdec_dev->subdev_bitmap)) + return; + + if (vdec_dev->vdec_pdata->is_subdev_supported) { + subdev_dev = mtk_vcodec_get_hw_dev(vdec_dev, hw_idx); + if (subdev_dev) + disable_irq(subdev_dev->dec_irq); + else + dev_err(&vdec_dev->plat_dev->dev, "Failed to get hw dev\n"); + } else { + disable_irq(vdec_dev->dec_irq); + } +} + +static void mtk_vcodec_load_racing_info(struct mtk_vcodec_dec_ctx *ctx) +{ + void __iomem *vdec_racing_addr; + int j; + + mutex_lock(&ctx->dev->dec_racing_info_mutex); + if (atomic_inc_return(&ctx->dev->dec_active_cnt) == 1) { + vdec_racing_addr = ctx->dev->reg_base[VDEC_MISC] + 0x100; + for (j = 0; j < 132; j++) + writel(ctx->dev->vdec_racing_info[j], vdec_racing_addr + j * 4); + } + mutex_unlock(&ctx->dev->dec_racing_info_mutex); +} + +static void mtk_vcodec_record_racing_info(struct mtk_vcodec_dec_ctx *ctx) +{ + void __iomem *vdec_racing_addr; + int j; + + mutex_lock(&ctx->dev->dec_racing_info_mutex); + if (atomic_dec_and_test(&ctx->dev->dec_active_cnt)) { + vdec_racing_addr = ctx->dev->reg_base[VDEC_MISC] + 0x100; + for (j = 0; j < 132; j++) + ctx->dev->vdec_racing_info[j] = readl(vdec_racing_addr + j * 4); + } + mutex_unlock(&ctx->dev->dec_racing_info_mutex); +} + +static struct mtk_vcodec_pm *mtk_vcodec_dec_get_pm(struct mtk_vcodec_dec_dev *vdec_dev, + int hw_idx) +{ + struct mtk_vdec_hw_dev *subdev_dev; + + if (!test_bit(hw_idx, vdec_dev->subdev_bitmap)) + return NULL; + + if (vdec_dev->vdec_pdata->is_subdev_supported) { + subdev_dev = mtk_vcodec_get_hw_dev(vdec_dev, hw_idx); + if (subdev_dev) + return &subdev_dev->pm; + + dev_err(&vdec_dev->plat_dev->dev, "Failed to get hw dev\n"); + return NULL; + } + + return &vdec_dev->pm; +} + +static void mtk_vcodec_dec_child_dev_on(struct mtk_vcodec_dec_dev *vdec_dev, + int hw_idx) +{ + struct mtk_vcodec_pm *pm; + + pm = mtk_vcodec_dec_get_pm(vdec_dev, hw_idx); + if (pm) { + mtk_vcodec_dec_pw_on(pm); + mtk_vcodec_dec_clock_on(pm); + } + + if (hw_idx == MTK_VDEC_LAT0) { + pm = mtk_vcodec_dec_get_pm(vdec_dev, MTK_VDEC_LAT_SOC); + if (pm) { + mtk_vcodec_dec_pw_on(pm); + mtk_vcodec_dec_clock_on(pm); + } + } +} + +static void mtk_vcodec_dec_child_dev_off(struct mtk_vcodec_dec_dev *vdec_dev, + int hw_idx) +{ + struct mtk_vcodec_pm *pm; + + pm = mtk_vcodec_dec_get_pm(vdec_dev, hw_idx); + if (pm) { + mtk_vcodec_dec_clock_off(pm); + mtk_vcodec_dec_pw_off(pm); + } + + if (hw_idx == MTK_VDEC_LAT0) { + pm = mtk_vcodec_dec_get_pm(vdec_dev, MTK_VDEC_LAT_SOC); + if (pm) { + mtk_vcodec_dec_clock_off(pm); + mtk_vcodec_dec_pw_off(pm); + } + } +} + +void mtk_vcodec_dec_enable_hardware(struct mtk_vcodec_dec_ctx *ctx, int hw_idx) +{ + mutex_lock(&ctx->dev->dec_mutex[hw_idx]); + + if (IS_VDEC_LAT_ARCH(ctx->dev->vdec_pdata->hw_arch) && + hw_idx == MTK_VDEC_CORE) + mtk_vcodec_dec_child_dev_on(ctx->dev, MTK_VDEC_LAT0); + mtk_vcodec_dec_child_dev_on(ctx->dev, hw_idx); + + mtk_vcodec_dec_enable_irq(ctx->dev, hw_idx); + + if (IS_VDEC_INNER_RACING(ctx->dev->dec_capability)) + mtk_vcodec_load_racing_info(ctx); +} +EXPORT_SYMBOL_GPL(mtk_vcodec_dec_enable_hardware); + +void mtk_vcodec_dec_disable_hardware(struct mtk_vcodec_dec_ctx *ctx, int hw_idx) +{ + if (IS_VDEC_INNER_RACING(ctx->dev->dec_capability)) + mtk_vcodec_record_racing_info(ctx); + + mtk_vcodec_dec_disable_irq(ctx->dev, hw_idx); + + mtk_vcodec_dec_child_dev_off(ctx->dev, hw_idx); + if (IS_VDEC_LAT_ARCH(ctx->dev->vdec_pdata->hw_arch) && + hw_idx == MTK_VDEC_CORE) + mtk_vcodec_dec_child_dev_off(ctx->dev, MTK_VDEC_LAT0); + + mutex_unlock(&ctx->dev->dec_mutex[hw_idx]); +} +EXPORT_SYMBOL_GPL(mtk_vcodec_dec_disable_hardware); |