From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Douglas Anderson <dianders@chromium.org>
Cc: Andrzej Hajda <a.hajda@samsung.com>,
Neil Armstrong <narmstrong@baylibre.com>,
Jonas Karlman <jonas@kwiboo.se>,
Jernej Skrabec <jernej.skrabec@siol.net>,
Sam Ravnborg <sam@ravnborg.org>,
Linus W <linus.walleij@linaro.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
robdclark@chromium.org, Stephen Boyd <swboyd@chromium.org>,
Steev Klimaszewski <steev@kali.org>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
linux-arm-msm@vger.kernel.org,
Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>,
Boris Brezillon <boris.brezillon@collabora.com>,
Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 01/12] drm/bridge: Fix the stop condition of drm_bridge_chain_pre_enable()
Date: Mon, 5 Apr 2021 03:49:39 +0300 [thread overview]
Message-ID: <YGpeo9LV4uAh1B7u@pendragon.ideasonboard.com> (raw)
In-Reply-To: <20210402152701.v3.1.If62a003f76a2bc4ccc6c53565becc05d2aad4430@changeid>
Hi Doug,
Thank you for the patch.
On Fri, Apr 02, 2021 at 03:28:35PM -0700, Douglas Anderson wrote:
> The drm_bridge_chain_pre_enable() is not the proper opposite of
> drm_bridge_chain_post_disable(). It continues along the chain to
> _before_ the starting bridge. Let's fix that.
>
> Fixes: 05193dc38197 ("drm/bridge: Make the bridge chain a double-linked list")
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
> ---
>
> (no changes since v1)
>
> drivers/gpu/drm/drm_bridge.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
> index 64f0effb52ac..044acd07c153 100644
> --- a/drivers/gpu/drm/drm_bridge.c
> +++ b/drivers/gpu/drm/drm_bridge.c
> @@ -522,6 +522,9 @@ void drm_bridge_chain_pre_enable(struct drm_bridge *bridge)
> list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) {
> if (iter->funcs->pre_enable)
> iter->funcs->pre_enable(iter);
> +
> + if (iter == bridge)
> + break;
This looks good as it matches drm_atomic_bridge_chain_disable().
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
I'm curious though, given that the bridge passed to the function should
be the one closest to the encoder, does this make a difference ?
> }
> }
> EXPORT_SYMBOL(drm_bridge_chain_pre_enable);
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2021-04-05 0:50 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-02 22:28 [PATCH v3 00/12] drm: Fix EDID reading on ti-sn65dsi86 Douglas Anderson
2021-04-02 22:28 ` [PATCH v3 01/12] drm/bridge: Fix the stop condition of drm_bridge_chain_pre_enable() Douglas Anderson
2021-04-05 0:49 ` Laurent Pinchart [this message]
2021-04-15 1:19 ` Doug Anderson
2021-04-15 1:56 ` Laurent Pinchart
2021-04-15 14:48 ` Doug Anderson
2021-04-02 22:28 ` [PATCH v3 02/12] drm/bridge: ti-sn65dsi86: Simplify refclk handling Douglas Anderson
2021-04-02 22:28 ` [PATCH v3 03/12] drm/bridge: ti-sn65dsi86: Remove incorrectly tagged kerneldoc comment Douglas Anderson
2021-04-05 0:50 ` Laurent Pinchart
2021-04-02 22:28 ` [PATCH v3 04/12] drm/bridge: ti-sn65dsi86: Reorder remove() Douglas Anderson
2021-04-05 0:52 ` Laurent Pinchart
2021-04-02 22:28 ` [PATCH v3 05/12] drm/bridge: ti-sn65dsi86: Move drm_panel_unprepare() to post_disable() Douglas Anderson
2021-04-05 0:58 ` Laurent Pinchart
2021-04-02 22:28 ` [PATCH v3 06/12] drm/bridge: ti-sn65dsi86: Get rid of the useless detect() function Douglas Anderson
2021-04-05 0:58 ` Laurent Pinchart
2021-04-02 22:28 ` [PATCH v3 07/12] drm/bridge: ti-sn65dsi86: Remove extra call: drm_connector_update_edid_property() Douglas Anderson
2021-04-05 1:01 ` Laurent Pinchart
2021-04-02 22:28 ` [PATCH v3 08/12] drm/bridge: ti-sn65dsi86: Power things properly for reading the EDID Douglas Anderson
2021-04-02 22:28 ` [PATCH v3 09/12] drm/bridge: ti-sn65dsi86: Fail aux transfers right away if not powered Douglas Anderson
2021-04-02 22:28 ` [PATCH v3 10/12] drm/bridge: ti-sn65dsi86: Read the EDID only if refclk was provided Douglas Anderson
2021-04-05 1:04 ` Laurent Pinchart
2021-04-02 22:28 ` [PATCH v3 11/12] drm/bridge: ti-sn65dsi86: Print an error if we fallback to panel modes Douglas Anderson
2021-04-05 1:04 ` Laurent Pinchart
2021-04-02 22:28 ` [PATCH v3 12/12] drm/panel: panel-simple: Use runtime pm to avoid excessive unprepare / prepare Douglas Anderson
2021-04-15 0:58 ` Laurent Pinchart
2021-04-15 1:22 ` Doug Anderson
2021-04-15 1:30 ` Laurent Pinchart
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