From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 213715] failed to change brightness of HDR panel on AMD GREEN_SARDINE through aux
Date: Tue, 20 Jul 2021 16:08:38 +0000 [thread overview]
Message-ID: <bug-213715-2300-yYHb1CQ5q7@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-213715-2300@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=213715
mario.limonciello@amd.com changed:
What |Removed |Added
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CC| |mario.limonciello@amd.com
--- Comment #2 from mario.limonciello@amd.com ---
I would suggest to work with BOE and CSO to fix the DPCD values in panel
firmware to not report aux control if it is not functional.
You can see the kernel checks the DPCD to determine whether to use AUX or PWM.
https://github.com/torvalds/linux/blob/c010efb7f0bc0c3cb2cd26b000f71d4bd0c427cd/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c#L2433
BTW this behavior has been also been reported in the past, so a heuristic may
be introduced at some point in the future for the buggy panel firmware:
https://gitlab.freedesktop.org/drm/amd/-/issues/1438
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prev parent reply other threads:[~2021-07-20 16:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-13 16:27 [Bug 213715] New: failed to change brightness of HDR panel on AMD GREEN_SARDINE through aux bugzilla-daemon
2021-07-13 16:29 ` [Bug 213715] " bugzilla-daemon
2021-07-20 16:08 ` bugzilla-daemon [this message]
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