From: Thierry Reding <thierry.reding@gmail.com>
To: Lyude Paul <lyude@redhat.com>
Cc: nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Jonathan Hunter <jonathanh@nvidia.com>,
"open list:DRM DRIVERS FOR NVIDIA TEGRA"
<linux-tegra@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 02/20] drm/tegra: Don't register DP AUX channels before connectors
Date: Mon, 29 Mar 2021 08:51:09 +0200 [thread overview]
Message-ID: <YGF43W1kppXmOTwh@orome.fritz.box> (raw)
In-Reply-To: <20210326203807.105754-3-lyude@redhat.com>
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On Fri, Mar 26, 2021 at 04:37:49PM -0400, Lyude Paul wrote:
> As pointed out by the documentation for drm_dp_aux_register(),
> drm_dp_aux_init() should be used in situations where the AUX channel for a
> display driver can potentially be registered before it's respective DRM
> driver. This is the case with Tegra, since the DP aux channel exists as a
> platform device instead of being a grandchild of the DRM device.
>
> Since we're about to add a backpointer to a DP AUX channel's respective DRM
> device, let's fix this so that we don't potentially allow userspace to use
> the AUX channel before we've associated it with it's DRM connector.
>
> Signed-off-by: Lyude Paul <lyude@redhat.com>
> ---
> drivers/gpu/drm/tegra/dpaux.c | 11 ++++++-----
> 1 file changed, 6 insertions(+), 5 deletions(-)
Acked-by: Thierry Reding <treding@nvidia.com>
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next prev parent reply other threads:[~2021-03-29 6:51 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210326203807.105754-1-lyude@redhat.com>
2021-03-26 20:37 ` [PATCH v2 01/20] drm/dp: Fixup kernel docs for struct drm_dp_aux Lyude Paul
2021-03-26 20:37 ` [PATCH v2 02/20] drm/tegra: Don't register DP AUX channels before connectors Lyude Paul
2021-03-29 6:51 ` Thierry Reding [this message]
2021-03-26 20:37 ` [PATCH v2 03/20] drm/bridge/cdns-mhdp8546: Register DP aux channel with userspace Lyude Paul
2021-03-26 20:37 ` [PATCH v2 04/20] drm/nouveau/kms/nv50-: Move AUX adapter reg to connector late register/early unregister Lyude Paul
2021-03-26 20:37 ` [PATCH v2 05/20] drm/dp: Add backpointer to drm_device in drm_dp_aux Lyude Paul
2021-03-29 7:08 ` Thierry Reding
2021-04-01 13:31 ` Jani Nikula
2021-03-26 20:37 ` [PATCH v2 06/20] drm/dp: Clarify DP AUX registration time Lyude Paul
2021-03-26 20:37 ` [PATCH v2 07/20] drm/print: Fixup DRM_DEBUG_KMS_RATELIMITED() Lyude Paul
2021-03-30 10:43 ` Robert Foss
2021-03-26 20:37 ` [PATCH v2 08/20] drm/dp: Pass drm_dp_aux to drm_dp_link_train_clock_recovery_delay() Lyude Paul
2021-03-26 20:37 ` [PATCH v2 09/20] drm/dp: Pass drm_dp_aux to drm_dp*_link_train_channel_eq_delay() Lyude Paul
2021-03-26 20:37 ` [PATCH v2 10/20] drm/dp: Always print aux channel name in logs Lyude Paul
2021-03-26 20:37 ` [PATCH v2 11/20] drm/dp_dual_mode: Pass drm_device to drm_dp_dual_mode_detect() Lyude Paul
2021-03-26 20:37 ` [PATCH v2 12/20] drm/dp_dual_mode: Pass drm_device to drm_dp_dual_mode_set_tmds_output() Lyude Paul
2021-03-26 20:38 ` [PATCH v2 13/20] drm/dp_dual_mode: Pass drm_device to drm_dp_dual_mode_max_tmds_clock() Lyude Paul
2021-03-26 20:38 ` [PATCH v2 14/20] drm/dp_dual_mode: Pass drm_device to drm_dp_dual_mode_get_tmds_output() Lyude Paul
2021-03-26 20:38 ` [PATCH v2 15/20] drm/dp_dual_mode: Pass drm_device to drm_lspcon_(get|set)_mode() Lyude Paul
2021-03-26 20:38 ` [PATCH v2 16/20] drm/dp_mst: Pass drm_dp_mst_topology_mgr to drm_dp_get_vc_payload_bw() Lyude Paul
2021-03-26 20:38 ` [PATCH v2 17/20] drm/dp: Convert drm_dp_helper.c to using drm_err/drm_dbg_*() Lyude Paul
2021-03-30 11:04 ` Robert Foss
2021-03-26 20:38 ` [PATCH v2 18/20] drm/dp_dual_mode: Convert drm_dp_dual_mode_helper.c to using drm_err/drm_dbg_kms() Lyude Paul
2021-03-26 20:38 ` [PATCH v2 19/20] drm/dp_mst: Drop DRM_ERROR() on kzalloc() fail in drm_dp_mst_handle_up_req() Lyude Paul
2021-03-30 11:06 ` Robert Foss
2021-03-26 20:38 ` [PATCH v2 20/20] drm/dp_mst: Convert drm_dp_mst_topology.c to drm_err()/drm_dbg*() Lyude Paul
2021-03-30 11:19 ` Robert Foss
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