From: Michael <michael@fossekall.de>
To: Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Samuel Holland <samuel@sholland.org>
Cc: dri-devel@lists.freedesktop.org,
linux-arm-kernel@lists.infradead.org,
linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org,
regressions@lists.linux.dev
Subject: [REGRESSION] [BISECTED] drm/sun4i: hdmi: No HDMI output with BananaPI M1 on 6.9
Date: Mon, 12 May 2025 22:27:06 +0200 [thread overview]
Message-ID: <aCJZmm8rC0RwbcBX@a98shuttle.de> (raw)
Hi,
with v6.9 and later there is no output on the BananaPI HDMI connector.
I have bisected the issue to the following commit:
358e76fd613a ("drm/sun4i: hdmi: Consolidate atomic_check and mode_valid")
With this patch, sun4i_hdmi_connector_clock_valid() is occasionally
called with clock=0, causing the function to return MODE_NOCLOCK.
In the old sun4i_hdmi_mode_valid() before the patch, mode->clock is
always!=0, maybe that gives someone a hint.
--
Michael
next reply other threads:[~2025-05-12 20:30 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-12 20:27 Michael [this message]
2025-05-26 16:56 ` [REGRESSION] [BISECTED] drm/sun4i: hdmi: No HDMI output with BananaPI M1 on 6.9 Michael Klein
2025-05-26 17:30 ` Maxime Ripard
2025-05-26 21:13 ` Michael
2025-06-02 9:55 ` Maxime Ripard
2025-06-02 18:40 ` Michael Klein
2025-06-02 20:22 ` Michael Klein
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