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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Lauri Tirkkonen <lauri@hacktheplanet.fi>
Cc: Mario Limonciello <superm1@kernel.org>,
	stable@vger.kernel.org, regressions@lists.linux.dev,
	amd-gfx@lists.freedesktop.org, Wayne Lin <wayne.lin@amd.com>,
	Alex Deucher <alexander.deucher@amd.com>
Subject: Re: [REGRESSION] [PATCH] drm/amd/display: fix initial backlight brightness calculation
Date: Sun, 20 Jul 2025 12:26:48 +0200	[thread overview]
Message-ID: <2025072012-deluge-arbitrate-9129@gregkh> (raw)
In-Reply-To: <aHy4tohvbwd1HpxI@hacktheplanet.fi>

On Sun, Jul 20, 2025 at 06:36:54PM +0900, Lauri Tirkkonen wrote:
> DIV_ROUND_CLOSEST(x, 100) returns either 0 or 1 if 0<x<=100, so the
> division needs to be performed after the multiplication and not the
> other way around, to properly scale the value.
> 
> Fixes: 6c56c8ec6f97 ("drm/amd/display: Fix default DC and AC levels")

This should be a commit id in Linus's tree, NOT in just one stable
branch.

Also, you forgot to add a cc: stable@vger.kernel.org so that it will be
picked up by a stable release.

thanks,

greg k-h

  reply	other threads:[~2025-07-20 10:26 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-18  7:29 [REGRESSION] drm/amd/display: backlight brightness set to 0 at amdgpu initialization Lauri Tirkkonen
2025-07-18 13:10 ` Mario Limonciello
2025-07-18 14:36   ` Lauri Tirkkonen
2025-07-18 17:13     ` Mario Limonciello
2025-07-19  1:03       ` Lauri Tirkkonen
2025-07-19  1:14         ` Mario Limonciello
2025-07-19  2:12           ` Lauri Tirkkonen
2025-07-19 15:25             ` Mario Limonciello
2025-07-19 17:39               ` Mario Limonciello
2025-07-20  9:34                 ` Lauri Tirkkonen
2025-07-20  9:36                   ` [REGRESSION] [PATCH] drm/amd/display: fix initial backlight brightness calculation Lauri Tirkkonen
2025-07-20 10:26                     ` Greg Kroah-Hartman [this message]
2025-07-21  0:51                       ` Lauri Tirkkonen
2025-07-20 12:49                     ` Mario Limonciello

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