Commit d5aecd28 authored by Jernej Skrabec's avatar Jernej Skrabec Committed by Mauro Carvalho Chehab

media: cedrus: Implement runtime PM

This allows the VE clocks and PLL_VE to be disabled most of the time.
A runtime PM reference is held while streaming.
Signed-off-by: default avatarJernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: default avatarSamuel Holland <samuel@sholland.org>
Reviewed-by: default avatarEzequiel Garcia <ezequiel@collabora.com>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent a8876c22
......@@ -16,6 +16,7 @@
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pm.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
......@@ -551,12 +552,18 @@ static const struct of_device_id cedrus_dt_match[] = {
};
MODULE_DEVICE_TABLE(of, cedrus_dt_match);
static const struct dev_pm_ops cedrus_dev_pm_ops = {
SET_RUNTIME_PM_OPS(cedrus_hw_suspend,
cedrus_hw_resume, NULL)
};
static struct platform_driver cedrus_driver = {
.probe = cedrus_probe,
.remove = cedrus_remove,
.driver = {
.name = CEDRUS_NAME,
.of_match_table = of_match_ptr(cedrus_dt_match),
.pm = &cedrus_dev_pm_ops,
},
};
module_platform_driver(cedrus_driver);
......
......@@ -19,6 +19,7 @@
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/soc/sunxi/sunxi_sram.h>
......@@ -140,6 +141,64 @@ static irqreturn_t cedrus_irq(int irq, void *data)
return IRQ_HANDLED;
}
int cedrus_hw_suspend(struct device *device)
{
struct cedrus_dev *dev = dev_get_drvdata(device);
reset_control_assert(dev->rstc);
clk_disable_unprepare(dev->ram_clk);
clk_disable_unprepare(dev->mod_clk);
clk_disable_unprepare(dev->ahb_clk);
return 0;
}
int cedrus_hw_resume(struct device *device)
{
struct cedrus_dev *dev = dev_get_drvdata(device);
int ret;
ret = clk_prepare_enable(dev->ahb_clk);
if (ret) {
dev_err(dev->dev, "Failed to enable AHB clock\n");
return ret;
}
ret = clk_prepare_enable(dev->mod_clk);
if (ret) {
dev_err(dev->dev, "Failed to enable MOD clock\n");
goto err_ahb_clk;
}
ret = clk_prepare_enable(dev->ram_clk);
if (ret) {
dev_err(dev->dev, "Failed to enable RAM clock\n");
goto err_mod_clk;
}
ret = reset_control_reset(dev->rstc);
if (ret) {
dev_err(dev->dev, "Failed to apply reset\n");
goto err_ram_clk;
}
return 0;
err_ram_clk:
clk_disable_unprepare(dev->ram_clk);
err_mod_clk:
clk_disable_unprepare(dev->mod_clk);
err_ahb_clk:
clk_disable_unprepare(dev->ahb_clk);
return ret;
}
int cedrus_hw_probe(struct cedrus_dev *dev)
{
const struct cedrus_variant *variant;
......@@ -236,42 +295,17 @@ int cedrus_hw_probe(struct cedrus_dev *dev)
goto err_sram;
}
ret = clk_prepare_enable(dev->ahb_clk);
if (ret) {
dev_err(dev->dev, "Failed to enable AHB clock\n");
goto err_sram;
}
ret = clk_prepare_enable(dev->mod_clk);
if (ret) {
dev_err(dev->dev, "Failed to enable MOD clock\n");
goto err_ahb_clk;
}
ret = clk_prepare_enable(dev->ram_clk);
if (ret) {
dev_err(dev->dev, "Failed to enable RAM clock\n");
goto err_mod_clk;
}
ret = reset_control_reset(dev->rstc);
if (ret) {
dev_err(dev->dev, "Failed to apply reset\n");
goto err_ram_clk;
pm_runtime_enable(dev->dev);
if (!pm_runtime_enabled(dev->dev)) {
ret = cedrus_hw_resume(dev->dev);
if (ret)
goto err_pm;
}
return 0;
err_ram_clk:
clk_disable_unprepare(dev->ram_clk);
err_mod_clk:
clk_disable_unprepare(dev->mod_clk);
err_ahb_clk:
clk_disable_unprepare(dev->ahb_clk);
err_pm:
pm_runtime_disable(dev->dev);
err_sram:
sunxi_sram_release(dev->dev);
err_mem:
......@@ -282,11 +316,9 @@ int cedrus_hw_probe(struct cedrus_dev *dev)
void cedrus_hw_remove(struct cedrus_dev *dev)
{
reset_control_assert(dev->rstc);
clk_disable_unprepare(dev->ram_clk);
clk_disable_unprepare(dev->mod_clk);
clk_disable_unprepare(dev->ahb_clk);
pm_runtime_disable(dev->dev);
if (!pm_runtime_status_suspended(dev->dev))
cedrus_hw_suspend(dev->dev);
sunxi_sram_release(dev->dev);
......
......@@ -22,6 +22,9 @@ void cedrus_engine_disable(struct cedrus_dev *dev);
void cedrus_dst_format_set(struct cedrus_dev *dev,
struct v4l2_pix_format *fmt);
int cedrus_hw_suspend(struct device *device);
int cedrus_hw_resume(struct device *device);
int cedrus_hw_probe(struct cedrus_dev *dev);
void cedrus_hw_remove(struct cedrus_dev *dev);
......
......@@ -13,6 +13,8 @@
* Marek Szyprowski, <m.szyprowski@samsung.com>
*/
#include <linux/pm_runtime.h>
#include <media/videobuf2-dma-contig.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
......@@ -450,12 +452,24 @@ static int cedrus_start_streaming(struct vb2_queue *vq, unsigned int count)
return -EINVAL;
}
if (V4L2_TYPE_IS_OUTPUT(vq->type) &&
dev->dec_ops[ctx->current_codec]->start)
ret = dev->dec_ops[ctx->current_codec]->start(ctx);
if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
ret = pm_runtime_get_sync(dev->dev);
if (ret < 0)
goto err_cleanup;
if (ret)
cedrus_queue_cleanup(vq, VB2_BUF_STATE_QUEUED);
if (dev->dec_ops[ctx->current_codec]->start) {
ret = dev->dec_ops[ctx->current_codec]->start(ctx);
if (ret)
goto err_pm;
}
}
return 0;
err_pm:
pm_runtime_put(dev->dev);
err_cleanup:
cedrus_queue_cleanup(vq, VB2_BUF_STATE_QUEUED);
return ret;
}
......@@ -465,9 +479,12 @@ static void cedrus_stop_streaming(struct vb2_queue *vq)
struct cedrus_ctx *ctx = vb2_get_drv_priv(vq);
struct cedrus_dev *dev = ctx->dev;
if (V4L2_TYPE_IS_OUTPUT(vq->type) &&
dev->dec_ops[ctx->current_codec]->stop)
dev->dec_ops[ctx->current_codec]->stop(ctx);
if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
if (dev->dec_ops[ctx->current_codec]->stop)
dev->dec_ops[ctx->current_codec]->stop(ctx);
pm_runtime_put(dev->dev);
}
cedrus_queue_cleanup(vq, VB2_BUF_STATE_ERROR);
}
......
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