#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>
};
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);
#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>
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;
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:
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);
* 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>
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;
}
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);
}