From a99a37f6cd5a74d5b22c08544aa6c5890813c8ba Mon Sep 17 00:00:00 2001 From: Paul Cercueil Date: Fri, 15 May 2020 12:43:38 +0200 Subject: remoteproc: Add support for runtime PM Call pm_runtime_get_sync() before the firmware is loaded, and pm_runtime_put() after the remote processor has been stopped. Even though the remoteproc device has no PM callbacks, this allows the parent device's PM callbacks to be properly called. Signed-off-by: Paul Cercueil Link: https://lore.kernel.org/r/20200515104340.10473-3-paul@crapouillou.net Signed-off-by: Bjorn Andersson --- drivers/remoteproc/remoteproc_core.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'drivers/remoteproc') diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 9c6d9ff7a1fc..0cc015fabf78 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -29,6 +29,7 @@ #include #include #include +#include #include #include #include @@ -1382,6 +1383,12 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) if (ret) return ret; + ret = pm_runtime_get_sync(dev); + if (ret < 0) { + dev_err(dev, "pm_runtime_get_sync failed: %d\n", ret); + return ret; + } + dev_info(dev, "Booting fw image %s, size %zd\n", name, fw->size); /* @@ -1391,7 +1398,7 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) ret = rproc_enable_iommu(rproc); if (ret) { dev_err(dev, "can't enable iommu: %d\n", ret); - return ret; + goto put_pm_runtime; } /* Prepare rproc for firmware loading if needed */ @@ -1445,6 +1452,8 @@ unprepare_rproc: rproc_unprepare_device(rproc); disable_iommu: rproc_disable_iommu(rproc); +put_pm_runtime: + pm_runtime_put(dev); return ret; } @@ -1882,6 +1891,8 @@ void rproc_shutdown(struct rproc *rproc) rproc_disable_iommu(rproc); + pm_runtime_put(dev); + /* Free the copy of the resource table */ kfree(rproc->cached_table); rproc->cached_table = NULL; @@ -2172,6 +2183,9 @@ struct rproc *rproc_alloc(struct device *dev, const char *name, rproc->state = RPROC_OFFLINE; + pm_runtime_no_callbacks(&rproc->dev); + pm_runtime_enable(&rproc->dev); + return rproc; put_device: @@ -2191,6 +2205,7 @@ EXPORT_SYMBOL(rproc_alloc); */ void rproc_free(struct rproc *rproc) { + pm_runtime_disable(&rproc->dev); put_device(&rproc->dev); } EXPORT_SYMBOL(rproc_free); -- cgit v1.2.3