From: Ulf Hansson <ulf.hansson@linaro.org>
To: Dmitry Osipenko <digetx@gmail.com>
Cc: "Thierry Reding" <thierry.reding@gmail.com>,
"Jonathan Hunter" <jonathanh@nvidia.com>,
"Viresh Kumar" <vireshk@kernel.org>,
"Stephen Boyd" <sboyd@kernel.org>,
"Peter De Schrijver" <pdeschrijver@nvidia.com>,
"Mikko Perttunen" <mperttunen@nvidia.com>,
"Peter Chen" <peter.chen@kernel.org>,
"Lee Jones" <lee.jones@linaro.org>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Nishanth Menon" <nm@ti.com>,
"Adrian Hunter" <adrian.hunter@intel.com>,
"Michael Turquette" <mturquette@baylibre.com>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
linux-tegra <linux-tegra@vger.kernel.org>,
"Linux PM" <linux-pm@vger.kernel.org>,
"Linux USB List" <linux-usb@vger.kernel.org>,
linux-staging@lists.linux.dev, linux-pwm@vger.kernel.org,
linux-mmc <linux-mmc@vger.kernel.org>,
dri-devel <dri-devel@lists.freedesktop.org>,
DTML <devicetree@vger.kernel.org>,
linux-clk <linux-clk@vger.kernel.org>,
"Mark Brown" <broonie@kernel.org>,
"Vignesh Raghavendra" <vigneshr@ti.com>,
"Richard Weinberger" <richard@nod.at>,
"Miquel Raynal" <miquel.raynal@bootlin.com>,
"Lucas Stach" <dev@lynxeye.de>, "Stefan Agner" <stefan@agner.ch>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
"David Heidelberg" <david@ixit.cz>
Subject: Re: [PATCH v13 09/35] gpu: host1x: Add runtime PM and OPP support
Date: Fri, 1 Oct 2021 15:24:21 +0200 [thread overview]
Message-ID: <CAPDyKFqqQvKusZ2gzHh69LNrncvi9_o04_xFKDpAkDbS-8Zecg@mail.gmail.com> (raw)
In-Reply-To: <20210926224058.1252-10-digetx@gmail.com>
On Mon, 27 Sept 2021 at 00:42, Dmitry Osipenko <digetx@gmail.com> wrote:
>
> Add runtime PM and OPP support to the Host1x driver. For the starter we
> will keep host1x always-on because dynamic power management require a major
> refactoring of the driver code since lot's of code paths are missing the
> RPM handling and we're going to remove some of these paths in the future.
>
> Tested-by: Peter Geis <pgwipeout@gmail.com> # Ouya T30
> Tested-by: Paul Fertser <fercerpav@gmail.com> # PAZ00 T20
> Tested-by: Nicolas Chauvet <kwizart@gmail.com> # PAZ00 T20 and TK1 T124
> Tested-by: Matt Merhar <mattmerhar@protonmail.com> # Ouya T30
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
[...]
> --- a/drivers/gpu/host1x/dev.c
> +++ b/drivers/gpu/host1x/dev.c
> @@ -6,14 +6,18 @@
> */
>
> #include <linux/clk.h>
> +#include <linux/delay.h>
> #include <linux/dma-mapping.h>
> #include <linux/io.h>
> #include <linux/list.h>
> #include <linux/module.h>
> #include <linux/of_device.h>
> #include <linux/of.h>
> +#include <linux/pm_runtime.h>
> #include <linux/slab.h>
>
> +#include <soc/tegra/common.h>
> +
> #define CREATE_TRACE_POINTS
> #include <trace/events/host1x.h>
> #undef CREATE_TRACE_POINTS
> @@ -190,6 +194,9 @@ static void host1x_setup_sid_table(struct host1x *host)
> const struct host1x_info *info = host->info;
> unsigned int i;
>
> + if (!info->has_hypervisor)
> + return;
> +
> for (i = 0; i < info->num_sid_entries; i++) {
> const struct host1x_sid_entry *entry = &info->sid_table[i];
>
> @@ -347,6 +354,27 @@ static void host1x_iommu_exit(struct host1x *host)
> }
> }
>
> +static int host1x_get_resets(struct host1x *host)
> +{
> + int err;
> +
> + host->resets[0].id = "mc";
> + host->resets[1].id = "host1x";
> + host->nresets = ARRAY_SIZE(host->resets);
> +
> + err = devm_reset_control_bulk_get_optional_exclusive_released(
> + host->dev, host->nresets, host->resets);
> + if (err) {
> + dev_err(host->dev, "failed to get reset: %d\n", err);
> + return err;
> + }
> +
> + if (WARN_ON(!host->resets[1].rstc))
> + return -ENOENT;
> +
> + return 0;
> +}
> +
> static int host1x_probe(struct platform_device *pdev)
> {
> struct host1x *host;
> @@ -423,12 +451,9 @@ static int host1x_probe(struct platform_device *pdev)
> return err;
> }
>
> - host->rst = devm_reset_control_get(&pdev->dev, "host1x");
> - if (IS_ERR(host->rst)) {
> - err = PTR_ERR(host->rst);
> - dev_err(&pdev->dev, "failed to get reset: %d\n", err);
> + err = host1x_get_resets(host);
> + if (err)
> return err;
> - }
>
> err = host1x_iommu_init(host);
> if (err < 0) {
> @@ -443,22 +468,10 @@ static int host1x_probe(struct platform_device *pdev)
> goto iommu_exit;
> }
>
> - err = clk_prepare_enable(host->clk);
> - if (err < 0) {
> - dev_err(&pdev->dev, "failed to enable clock\n");
> - goto free_channels;
> - }
> -
> - err = reset_control_deassert(host->rst);
> - if (err < 0) {
> - dev_err(&pdev->dev, "failed to deassert reset: %d\n", err);
> - goto unprepare_disable;
> - }
> -
> err = host1x_syncpt_init(host);
> if (err) {
> dev_err(&pdev->dev, "failed to initialize syncpts\n");
> - goto reset_assert;
> + goto free_channels;
> }
>
> err = host1x_intr_init(host, syncpt_irq);
> @@ -467,10 +480,18 @@ static int host1x_probe(struct platform_device *pdev)
> goto deinit_syncpt;
> }
>
> - host1x_debug_init(host);
> + pm_runtime_enable(&pdev->dev);
> +
> + err = devm_tegra_core_dev_init_opp_table_common(&pdev->dev);
> + if (err)
> + goto pm_disable;
>
> - if (host->info->has_hypervisor)
> - host1x_setup_sid_table(host);
> + /* the driver's code isn't ready yet for the dynamic RPM */
> + err = pm_runtime_resume_and_get(&pdev->dev);
> + if (err)
> + goto pm_disable;
> +
> + host1x_debug_init(host);
>
> err = host1x_register(host);
> if (err < 0)
> @@ -486,13 +507,14 @@ static int host1x_probe(struct platform_device *pdev)
> host1x_unregister(host);
> deinit_debugfs:
> host1x_debug_deinit(host);
> +
> + pm_runtime_put(&pdev->dev);
pm_runtime_put() is asynchronous, so it may not actually succeed to
trigger the ->runtime_suspend() callback to be invoked. Thus, this
could end up that we leave clocks prepared/enabled when ->probe()
fails, for example.
I guess pm_runtime_put_sync_suspend() is slightly better.
Another option is to call pm_runtime_force_suspend(), but then you
must skip the call pm_runtime_disable() afterwards, as that has
already been done inside that function.
> +pm_disable:
> + pm_runtime_disable(&pdev->dev);
> +
> host1x_intr_deinit(host);
> deinit_syncpt:
> host1x_syncpt_deinit(host);
> -reset_assert:
> - reset_control_assert(host->rst);
> -unprepare_disable:
> - clk_disable_unprepare(host->clk);
> free_channels:
> host1x_channel_list_free(&host->channel_list);
> iommu_exit:
> @@ -507,19 +529,94 @@ static int host1x_remove(struct platform_device *pdev)
>
> host1x_unregister(host);
> host1x_debug_deinit(host);
> +
> + pm_runtime_put(&pdev->dev);
Similar comment as in ->probe().
> + pm_runtime_disable(&pdev->dev);
> +
> host1x_intr_deinit(host);
> host1x_syncpt_deinit(host);
> - reset_control_assert(host->rst);
> - clk_disable_unprepare(host->clk);
> host1x_iommu_exit(host);
>
> return 0;
> }
>
> +
> + host1x_setup_sid_table(host);
> + host1x_syncpt_restore(host);
> + host1x_intr_start(host);
> +
> + return 0;
> +
> +disable_clk:
> + clk_disable_unprepare(host->clk);
> +release_reset:
> + reset_control_bulk_release(host->nresets, host->resets);
> +
> + return err;
> +}
> +
> +static const struct dev_pm_ops host1x_pm = {
> + SET_RUNTIME_PM_OPS(host1x_runtime_suspend, host1x_runtime_resume,
> + NULL)
> + /* TODO: add system suspend-resume once driver will be ready for that */
> +};
[...]
Kind regards
Uffe
next prev parent reply other threads:[~2021-10-01 13:25 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-26 22:40 [PATCH v13 00/35] NVIDIA Tegra power management patches for 5.16 Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 01/35] opp: Change type of dev_pm_opp_attach_genpd(names) argument Dmitry Osipenko
2021-10-04 9:11 ` Viresh Kumar
2021-09-26 22:40 ` [PATCH v13 02/35] soc/tegra: Add devm_tegra_core_dev_init_opp_table_common() Dmitry Osipenko
2021-10-01 12:50 ` Ulf Hansson
2021-10-01 19:15 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 03/35] soc/tegra: pmc: Disable PMC state syncing Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 04/35] soc/tegra: Don't print error message when OPPs not available Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 05/35] dt-bindings: clock: tegra-car: Document new clock sub-nodes Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 06/35] clk: tegra: Support runtime PM and power domain Dmitry Osipenko
2021-10-01 12:32 ` Ulf Hansson
2021-10-01 19:50 ` Dmitry Osipenko
2021-10-02 20:44 ` Dmitry Osipenko
2021-10-05 13:10 ` Ulf Hansson
2021-10-05 22:19 ` Dmitry Osipenko
2021-10-05 22:43 ` Dmitry Osipenko
2021-10-06 2:40 ` Dmitry Osipenko
2021-10-06 12:43 ` Ulf Hansson
2021-10-06 21:14 ` Dmitry Osipenko
2021-10-06 22:01 ` Dmitry Osipenko
2021-10-06 23:21 ` Dmitry Osipenko
2021-10-07 9:18 ` Ulf Hansson
2021-10-07 10:36 ` Dmitry Osipenko
2021-10-06 12:38 ` Ulf Hansson
2021-10-06 21:20 ` Dmitry Osipenko
2021-10-06 21:25 ` Dmitry Osipenko
2021-10-06 22:03 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 07/35] dt-bindings: host1x: Document OPP and power domain properties Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 08/35] dt-bindings: host1x: Document Memory Client resets of Host1x, GR2D and GR3D Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 09/35] gpu: host1x: Add runtime PM and OPP support Dmitry Osipenko
2021-10-01 13:24 ` Ulf Hansson [this message]
2021-09-26 22:40 ` [PATCH v13 10/35] gpu: host1x: Add host1x_channel_stop() Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 11/35] drm/tegra: dc: Support OPP and SoC core voltage scaling Dmitry Osipenko
2021-10-01 13:27 ` Ulf Hansson
2021-10-16 15:36 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 12/35] drm/tegra: hdmi: Add OPP support Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 13/35] drm/tegra: gr2d: Support generic power domain and runtime PM Dmitry Osipenko
2021-10-01 13:39 ` Ulf Hansson
2021-10-01 14:29 ` Dmitry Osipenko
2021-10-01 14:55 ` Ulf Hansson
2021-10-01 19:00 ` Dmitry Osipenko
2021-10-04 11:01 ` Ulf Hansson
2021-10-04 15:57 ` Dmitry Osipenko
2021-10-05 8:45 ` Ulf Hansson
2021-10-05 17:16 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 14/35] drm/tegra: gr3d: " Dmitry Osipenko
2021-10-01 14:06 ` Ulf Hansson
2021-10-01 21:25 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 15/35] drm/tegra: vic: Support system suspend Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 16/35] usb: chipidea: tegra: Add runtime PM and OPP support Dmitry Osipenko
2021-09-30 0:40 ` Dmitry Osipenko
2021-09-30 14:06 ` Peter Chen
2021-09-30 14:08 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 17/35] bus: tegra-gmi: " Dmitry Osipenko
2021-10-01 14:18 ` Ulf Hansson
2021-09-26 22:40 ` [PATCH v13 18/35] pwm: tegra: " Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 19/35] mmc: sdhci-tegra: " Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 20/35] mtd: rawnand: tegra: " Dmitry Osipenko
2021-10-01 14:24 ` Ulf Hansson
2021-10-01 14:35 ` Dmitry Osipenko
2021-10-01 15:01 ` Ulf Hansson
2021-10-17 8:38 ` Dmitry Osipenko
2021-10-19 11:40 ` Ulf Hansson
2021-09-26 22:40 ` [PATCH v13 21/35] spi: tegra20-slink: Add " Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 22/35] media: dt: bindings: tegra-vde: Convert to schema Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 23/35] media: dt: bindings: tegra-vde: Document OPP and power domain Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 24/35] media: staging: tegra-vde: Support generic " Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 25/35] soc/tegra: fuse: Reset hardware Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 26/35] soc/tegra: fuse: Use resource-managed helpers Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 27/35] soc/tegra: regulators: Prepare for suspend Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 28/35] soc/tegra: pmc: Rename 3d power domains Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 29/35] soc/tegra: pmc: Rename core power domain Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 30/35] soc/tegra: pmc: Enable core domain support for Tegra20 and Tegra30 Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 31/35] ARM: tegra: Add OPP tables and power domains to Tegra20 device-trees Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 32/35] ARM: tegra: Add OPP tables and power domains to Tegra30 device-trees Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 33/35] ARM: tegra: Add Memory Client resets to Tegra20 GR2D, GR3D and Host1x Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 34/35] ARM: tegra: Add Memory Client resets to Tegra30 " Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 35/35] ARM: tegra20/30: Disable unused host1x hardware Dmitry Osipenko
2021-10-01 14:36 ` [PATCH v13 00/35] NVIDIA Tegra power management patches for 5.16 Ulf Hansson
2021-10-01 14:40 ` Dmitry Osipenko
2021-10-01 15:02 ` Ulf Hansson
2021-10-04 9:11 ` Viresh Kumar
2021-10-04 14:52 ` Dmitry Osipenko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAPDyKFqqQvKusZ2gzHh69LNrncvi9_o04_xFKDpAkDbS-8Zecg@mail.gmail.com \
--to=ulf.hansson@linaro.org \
--cc=adrian.hunter@intel.com \
--cc=broonie@kernel.org \
--cc=david@ixit.cz \
--cc=dev@lynxeye.de \
--cc=devicetree@vger.kernel.org \
--cc=digetx@gmail.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=jonathanh@nvidia.com \
--cc=lee.jones@linaro.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mmc@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=linux-pwm@vger.kernel.org \
--cc=linux-staging@lists.linux.dev \
--cc=linux-tegra@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=mchehab@kernel.org \
--cc=miquel.raynal@bootlin.com \
--cc=mperttunen@nvidia.com \
--cc=mturquette@baylibre.com \
--cc=nm@ti.com \
--cc=pdeschrijver@nvidia.com \
--cc=peter.chen@kernel.org \
--cc=richard@nod.at \
--cc=sboyd@kernel.org \
--cc=stefan@agner.ch \
--cc=thierry.reding@gmail.com \
--cc=u.kleine-koenig@pengutronix.de \
--cc=vigneshr@ti.com \
--cc=vireshk@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).