From: Robert Foss <rfoss@kernel.org>
To: Lucas Stach <l.stach@pengutronix.de>
Cc: "Heiko Stübner" <heiko@sntech.de>,
"Andy Yan" <andy.yan@rock-chips.com>,
"Sandy Huang" <hjc@rock-chips.com>,
"Jingoo Han" <jingoohan1@gmail.com>,
"Inki Dae" <inki.dae@samsung.com>,
"Seung-Woo Kim" <sw0312.kim@samsung.com>,
"Kyungmin Park" <kyungmin.park@samsung.com>,
"Andrzej Hajda" <andrzej.hajda@intel.com>,
"Neil Armstrong" <neil.armstrong@linaro.org>,
"Laurent Pinchart" <Laurent.pinchart@ideasonboard.com>,
"Jonas Karlman" <jonas@kwiboo.se>,
"Jernej Skrabec" <jernej.skrabec@gmail.com>,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org,
linux-rockchip@lists.infradead.org,
dri-devel@lists.freedesktop.org, kernel@pengutronix.de,
patchwork-lst@pengutronix.de
Subject: Re: [PATCH 03/14] drm/bridge: analogix_dp: register AUX bus after enabling runtime PM
Date: Tue, 7 May 2024 14:49:30 +0200 [thread overview]
Message-ID: <CAN6tsi7hM+BLkaTnS=6-eHqERp7hCi3NM93=OMfHkwKohtBHEw@mail.gmail.com> (raw)
In-Reply-To: <20240503151129.3901815-4-l.stach@pengutronix.de>
On Fri, May 3, 2024 at 5:12 PM Lucas Stach <l.stach@pengutronix.de> wrote:
>
> AUX transactions require the controller to be in working state and
> take a runtime PM reference. To avoid potential races beween the
> first transactions on the bus and runtime PM being set up, move the
> AUX registration behind the runtime PM setup.
>
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> ---
> .../drm/bridge/analogix/analogix_dp_core.c | 19 +++++++++++--------
> 1 file changed, 11 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index b39721588980..0af2a70ae5bf 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -1728,31 +1728,34 @@ int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev)
> dp->drm_dev = drm_dev;
> dp->encoder = dp->plat_data->encoder;
>
> + pm_runtime_use_autosuspend(dp->dev);
> + pm_runtime_set_autosuspend_delay(dp->dev, 100);
> + pm_runtime_enable(dp->dev);
> +
> dp->aux.name = "DP-AUX";
> dp->aux.transfer = analogix_dpaux_transfer;
> dp->aux.dev = dp->dev;
> dp->aux.drm_dev = drm_dev;
>
> ret = drm_dp_aux_register(&dp->aux);
> - if (ret)
> - return ret;
> -
> - pm_runtime_use_autosuspend(dp->dev);
> - pm_runtime_set_autosuspend_delay(dp->dev, 100);
> - pm_runtime_enable(dp->dev);
> + if (ret) {
> + DRM_ERROR("failed to register AUX (%d)\n", ret);
> + goto err_disable_pm_runtime;
> + }
>
> ret = analogix_dp_create_bridge(drm_dev, dp);
> if (ret) {
> DRM_ERROR("failed to create bridge (%d)\n", ret);
> - goto err_disable_pm_runtime;
> + goto err_unregister_aux;
> }
>
> return 0;
>
> +err_unregister_aux:
> + drm_dp_aux_unregister(&dp->aux);
> err_disable_pm_runtime:
> pm_runtime_dont_use_autosuspend(dp->dev);
> pm_runtime_disable(dp->dev);
> - drm_dp_aux_unregister(&dp->aux);
>
> return ret;
> }
> --
> 2.39.2
>
Reviewed-by: Robert Foss <rfoss@kernel.org>
next prev parent reply other threads:[~2024-05-07 12:49 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-03 15:11 [PATCH 00/14] improve Analogix DP AUX channel handling Lucas Stach
2024-05-03 15:11 ` [PATCH 01/14] drm/bridge: analogix_dp: remove unused platform power_on_end callback Lucas Stach
2024-05-07 12:02 ` Robert Foss
2024-05-03 15:11 ` [PATCH 02/14] drm/rockchip: analogix_dp: add runtime PM handling Lucas Stach
2024-05-07 12:15 ` Robert Foss
2024-06-10 12:45 ` Heiko Stübner
2024-05-03 15:11 ` [PATCH 03/14] drm/bridge: analogix_dp: register AUX bus after enabling runtime PM Lucas Stach
2024-05-07 12:49 ` Robert Foss [this message]
2024-05-03 15:11 ` [PATCH 04/14] drm/bridge: analogix_dp: handle clock via " Lucas Stach
2024-05-07 12:57 ` Robert Foss
2024-05-03 15:11 ` [PATCH 05/14] drm/bridge: analogix_dp: remove unused analogix_dp_remove Lucas Stach
2024-05-07 12:58 ` Robert Foss
2024-05-03 15:11 ` [PATCH 06/14] drm/bridge: analogix_dp: remove clk handling from analogix_dp_set_bridge Lucas Stach
2024-05-07 13:00 ` Robert Foss
2024-05-03 15:11 ` [PATCH 07/14] drm/bridge: analogix_dp: move platform and PHY power handling into runtime PM Lucas Stach
2024-05-07 13:01 ` Robert Foss
2024-05-03 15:11 ` [PATCH 08/14] drm/bridge: analogix_dp: move basic controller init " Lucas Stach
2024-05-07 13:05 ` Robert Foss
2024-05-03 15:11 ` [PATCH 09/14] drm/bridge: analogix_dp: remove PLL lock check from analogix_dp_config_video Lucas Stach
2024-05-07 13:06 ` Robert Foss
2024-05-03 15:11 ` [PATCH 10/14] drm/bridge: analogix_dp: move macro reset after link bandwidth setting Lucas Stach
2024-05-07 13:07 ` Robert Foss
2024-06-10 11:45 ` Robert Foss
2024-05-03 15:11 ` [PATCH 11/14] drm/bridge: analogix_dp: don't wait for PLL lock too early Lucas Stach
2024-06-10 11:48 ` Robert Foss
2024-05-03 15:11 ` [PATCH 12/14] drm/bridge: analogix_dp: simplify and correct PLL lock checks Lucas Stach
2024-06-10 11:55 ` Robert Foss
2024-05-03 15:11 ` [PATCH 13/14] drm/bridge: analogix_dp: only read AUX status when an error occured Lucas Stach
2024-06-10 11:56 ` Robert Foss
2024-05-03 15:11 ` [PATCH 14/14] drm/bridge: analogix_dp: handle AUX transfer timeouts Lucas Stach
2024-06-10 11:57 ` Robert Foss
2024-05-07 13:10 ` [PATCH 00/14] improve Analogix DP AUX channel handling Robert Foss
2024-05-15 10:31 ` Lucas Stach
2024-06-10 12:47 ` Heiko Stübner
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='CAN6tsi7hM+BLkaTnS=6-eHqERp7hCi3NM93=OMfHkwKohtBHEw@mail.gmail.com' \
--to=rfoss@kernel.org \
--cc=Laurent.pinchart@ideasonboard.com \
--cc=andrzej.hajda@intel.com \
--cc=andy.yan@rock-chips.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=heiko@sntech.de \
--cc=hjc@rock-chips.com \
--cc=inki.dae@samsung.com \
--cc=jernej.skrabec@gmail.com \
--cc=jingoohan1@gmail.com \
--cc=jonas@kwiboo.se \
--cc=kernel@pengutronix.de \
--cc=kyungmin.park@samsung.com \
--cc=l.stach@pengutronix.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-rockchip@lists.infradead.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=neil.armstrong@linaro.org \
--cc=patchwork-lst@pengutronix.de \
--cc=sw0312.kim@samsung.com \
/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 read-only IMAP folder(s) and NNTP newsgroup(s).