{"id":2230860,"url":"http://patchwork.ozlabs.org/api/patches/2230860/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-tegra/patch/20260430070954.1005564-2-amhetre@nvidia.com/","project":{"id":21,"url":"http://patchwork.ozlabs.org/api/projects/21/?format=json","name":"Linux Tegra Development","link_name":"linux-tegra","list_id":"linux-tegra.vger.kernel.org","list_email":"linux-tegra@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260430070954.1005564-2-amhetre@nvidia.com>","list_archive_url":null,"date":"2026-04-30T07:09:53","name":"[V2,1/2] memory: tegra: Wire up system sleep PM ops","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"ab9ffe7749e4cd41d633306e315b8d00647a771c","submitter":{"id":75198,"url":"http://patchwork.ozlabs.org/api/people/75198/?format=json","name":"Ashish Mhetre","email":"amhetre@nvidia.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-tegra/patch/20260430070954.1005564-2-amhetre@nvidia.com/mbox/","series":[{"id":502220,"url":"http://patchwork.ozlabs.org/api/series/502220/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-tegra/list/?series=502220","date":"2026-04-30T07:09:52","name":"memory: tegra: Restore MC state on system resume","version":2,"mbox":"http://patchwork.ozlabs.org/series/502220/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2230860/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2230860/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-tegra@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256\n header.s=selector2 header.b=h6PKCrW/;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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On Tegra186 and later this means MC client Stream-ID\noverride registers are not reprogrammed.\n\nRegister a dev_pm_ops on the tegra-mc driver and route the system\nresume callback into mc->soc->ops->resume() so the existing SID\nrestore path runs again on wake.\n\nNo suspend callback is needed as the resume path reprograms all MC\nstate from the static SoC tables, so there is nothing to save.\n\nFixes: fe3b082a6eb8 (\"memory: tegra: Add SID override programming for MC clients\")\nSigned-off-by: Ashish Mhetre \n---\n drivers/memory/tegra/mc.c | 14 ++++++++++++++\n 1 file changed, 14 insertions(+)","diff":"diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c\nindex d620660da331..343ac0018eba 100644\n--- a/drivers/memory/tegra/mc.c\n+++ b/drivers/memory/tegra/mc.c\n@@ -13,6 +13,7 @@\n #include \n #include \n #include \n+#include \n #include \n #include \n #include \n@@ -1010,10 +1011,23 @@ static void tegra_mc_sync_state(struct device *dev)\n \t\ticc_sync_state(dev);\n }\n \n+static int tegra_mc_resume(struct device *dev)\n+{\n+\tstruct tegra_mc *mc = dev_get_drvdata(dev);\n+\n+\tif (mc->soc->ops && mc->soc->ops->resume)\n+\t\treturn mc->soc->ops->resume(mc);\n+\n+\treturn 0;\n+}\n+\n+static DEFINE_SIMPLE_DEV_PM_OPS(tegra_mc_pm_ops, NULL, tegra_mc_resume);\n+\n static struct platform_driver tegra_mc_driver = {\n \t.driver = {\n \t\t.name = \"tegra-mc\",\n \t\t.of_match_table = tegra_mc_of_match,\n+\t\t.pm = pm_sleep_ptr(&tegra_mc_pm_ops),\n \t\t.suppress_bind_attrs = true,\n \t\t.sync_state = tegra_mc_sync_state,\n \t},\n","prefixes":["V2","1/2"]}