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From: Burke Cates <burke.cates@gmail.com>
To: Xilin Wu <sophon@radxa.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
	Rob Clark <robin.clark@oss.qualcomm.com>,
	Dmitry Baryshkov <lumag@kernel.org>,
	Abhinav Kumar <abhinav.kumar@linux.dev>,
	Jessica Zhang <jesszhan0024@gmail.com>,
	Sean Paul <sean@poorly.run>,
	Marijn Suijten <marijn.suijten@somainline.org>,
	Andrzej Hajda <andrzej.hajda@intel.com>,
	Neil Armstrong <neil.armstrong@linaro.org>,
	Robert Foss <rfoss@kernel.org>,
	Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	Jonas Karlman <jonas@kwiboo.se>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Luca Ceresoli <luca.ceresoli@bootlin.com>,
	Kevin Hilman <khilman@baylibre.com>,
	Jerome Brunet <jbrunet@baylibre.com>,
	Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org,
	dragon@radxa.com, linux-amlogic@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 11/20] drm/msm/dp: Cache eDP link capabilities after successful discovery
Date: Thu, 29 Oct 2026 21:29:00 -0700	[thread overview]
Message-ID: <20261030042912.2745609-1-burke.cates@gmail.com> (raw)
In-Reply-To: <20261009-msm-dp-hdr10-v2-11-1835d4966da3@radxa.com>

On 09-Oct-26 11:16, Xilin Wu wrote:
> Discover eDP capabilities from connector detect before the first
> modeset.

I tested this patch on its own (not the rest of the series) on an ASUS
Zenbook A16 (UX3607OA, Snapdragon X2 Elite), on v7.3 plus out-of-tree
Glymur platform/board patches, which include other msm DP changes.

Without it, msm chose the eDP output bpp before the panel's link caps
had been read, so the first modeset after boot ran the 2880x1800@120
OLED at 18 bpp until a DPMS off/on. With this patch the first modeset
after boot comes up at 24 bpp, 4 lanes at HBR2, with no link-training
retries, on two boots of two different builds.

Tested-by: Burke Cates <burke.cates@gmail.com> # ASUS Zenbook A16 (UX3607OA)

AI coding assistants helped run these tests and draft this reply; the
results are from the hardware runs.

Thanks,
Burke

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linux-amlogic@lists.infradead.org
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  parent reply	other threads:[~2026-10-30  4:29 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-09  3:15 [PATCH v2 00/20] drm/msm/dp: Add static HDR support for DP and eDP Xilin Wu
2026-10-09  3:15 ` [PATCH v2 01/20] drm/atomic: Handle max bpc properties before connector state allocation Xilin Wu
2026-10-10  2:48   ` Chaoyi Chen
2026-10-12 12:33   ` Dmitry Baryshkov
2026-10-09  3:15 ` [PATCH v2 02/20] drm/connector: Drop early state allocation for max bpc registration Xilin Wu
2026-10-10 22:44   ` Martin Blumenstingl
2026-10-09  3:15 ` [PATCH v2 03/20] drm/bridge-connector: Attach max bpc for non-HDMI bridges Xilin Wu
2026-10-10  2:39   ` Chaoyi Chen
2026-10-12 12:40   ` Dmitry Baryshkov
2026-10-09  3:15 ` [PATCH v2 04/20] drm/msm/dp: Accept a const SDP header when packing Xilin Wu
2026-10-09  3:15 ` [PATCH v2 05/20] drm/msm/dp: Support multiple generic SDP slots Xilin Wu
2026-10-09  3:15 ` [PATCH v2 06/20] drm/msm/dp: Keep runtime PM calls outside the connection lock Xilin Wu
2026-10-09  3:37   ` sashiko-bot
2026-10-09  3:15 ` [PATCH v2 07/20] drm/msm/dp: Serialize stream operations with HPD processing Xilin Wu
2026-10-09  3:30   ` sashiko-bot
2026-10-12 12:48   ` Dmitry Baryshkov
2026-10-09  3:16 ` [PATCH v2 08/20] drm/msm/dp: Track PHY power ownership Xilin Wu
2026-10-09  3:16 ` [PATCH v2 09/20] drm/msm/dp: Unwind resources when enabling a stream fails Xilin Wu
2026-10-09  3:35   ` sashiko-bot
2026-10-09  3:16 ` [PATCH v2 10/20] drm/msm/dp: Report stream enable failures through link status Xilin Wu
2026-10-09  3:28   ` sashiko-bot
2026-10-09  3:16 ` [PATCH v2 11/20] drm/msm/dp: Cache eDP link capabilities after successful discovery Xilin Wu
2026-10-09  3:34   ` sashiko-bot
2026-10-30  4:29   ` Burke Cates [this message]
2026-10-09  3:16 ` [PATCH v2 12/20] drm/msm/dp: Rebuild the eDP stream on modesets leaving self refresh Xilin Wu
2026-10-09  3:16 ` [PATCH v2 13/20] drm/msm/dp: Track output bit depth in bridge atomic state Xilin Wu
2026-10-09  3:16 ` [PATCH v2 14/20] drm/msm/dp: Clear stale MSA colorimetry bits Xilin Wu
2026-10-12  8:00   ` Konrad Dybcio
2026-10-09  3:16 ` [PATCH v2 15/20] drm/msm/dp: Flush VSC updates when leaving YUV420 Xilin Wu
2026-10-12 14:09   ` Dmitry Baryshkov
2026-10-09  3:16 ` [PATCH v2 16/20] drm/msm/dp: Disable PSR for YUV420 streams Xilin Wu
2026-10-09  3:34   ` sashiko-bot
2026-10-12 14:36   ` Dmitry Baryshkov
2026-10-09  3:16 ` [PATCH v2 17/20] drm/msm/dp: Track VSC packets in bridge atomic state Xilin Wu
2026-10-09  3:34   ` sashiko-bot
2026-10-09  3:16 ` [PATCH v2 18/20] drm/msm/dp: Signal BT.2020 RGB on DP and eDP Xilin Wu
2026-10-12 14:48   ` Dmitry Baryshkov
2026-10-09  3:16 ` [PATCH v2 19/20] drm/msm/dp: Serialize video test state changes Xilin Wu
2026-10-09  3:44   ` sashiko-bot
2026-10-12 21:52   ` Dmitry Baryshkov
2026-10-09  3:16 ` [PATCH v2 20/20] drm/msm/dp: Add static HDR metadata support for DP and eDP Xilin Wu
2026-10-09  3:40   ` sashiko-bot

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