From nobody Fri Dec 19 18:31:41 2025 Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A993952F70; Sat, 24 Aug 2024 18:34:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.69.126.157 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724524479; cv=none; b=NosOHDk+sC7VMqZEKw1OiGYdRmDKsN+3AA7uwvP9gkVPL9cwq9BptsaxwehfEsrUNauW8zrBpe0xq8bexP6qXSxELqLh02GxUDrYR48t+nU3yr3L4rKkaGckGag2x28/sS8I9gV5P6cDNar/L3P2GX6553EbJJfYVb6pGuHDswE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724524479; c=relaxed/simple; bh=AfFeXIIAgQ9QcQOVPaJFq7joVIfw9zHjAXRU+l+Hz2c=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=nN368EzBn/MkaXLm90vbT5BxNFsq32axiHbgBkHkrJ590h5yu4LtU8p0IToJ/BJa0B5R5seW3liiHuu5/bBxqPqTVwAjzoMJTmXRhiZlFMjkNpcsxBE7ixKiEgoPx+e0PDtpzk+c89CWQOMRl+rM6pJqhN/zEPLyw+NckAx5xlE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net; spf=pass smtp.mailfrom=weissschuh.net; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b=by+kF/rh; arc=none smtp.client-ip=159.69.126.157 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b="by+kF/rh" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1724524474; bh=AfFeXIIAgQ9QcQOVPaJFq7joVIfw9zHjAXRU+l+Hz2c=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=by+kF/rhDcqEuvTj4uEr8LEyJldjHKcJxSSzc/QcP1ww5D2tXigDG4MXFU7sX21qQ 7PoYtVTBek4rF+boQNYvWXNR2aEAYFBBPskZppl5I7HH9xAAlv0RwmQXIcDiiqwfog Np+y3lQ8haKT+vzDUpeH51/g5WJxsL8+X0z2a24s= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Sat, 24 Aug 2024 20:33:56 +0200 Subject: [PATCH v6 3/4] drm: panel-backlight-quirks: Add Framework 13 matte panel Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240824-amdgpu-min-backlight-quirk-v6-3-1ed776a17fb3@weissschuh.net> References: <20240824-amdgpu-min-backlight-quirk-v6-0-1ed776a17fb3@weissschuh.net> In-Reply-To: <20240824-amdgpu-min-backlight-quirk-v6-0-1ed776a17fb3@weissschuh.net> To: Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , David Airlie , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Harry Wentland , Leo Li , Rodrigo Siqueira , Mario Limonciello , Matt Hartley , Kieran Levin , Hans de Goede , Jani Nikula , Xinhui Pan , Jonathan Corbet Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Dustin Howett , linux-doc@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1724524474; l=1482; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=AfFeXIIAgQ9QcQOVPaJFq7joVIfw9zHjAXRU+l+Hz2c=; b=aRBsXCe1+ZIvefXKrtVl3+KLKWtGSo3fVGq0sMRSB/Ro9OzQF+VgwHsWF15E4m6cz925Vfmma vDd7jK8eHFLCfuWbteIMbAv4v9rR+iDO61qALA+V8itnaqw8KcAdyFH X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= The value of "min_input_signal" returned from ATIF on a Framework AMD 13 is "12". This leads to a fairly bright minimum display backlight. Add a quirk to override that the minimum backlight PWM to "0" which leads to a much lower minimum brightness, which is still visible. Tested on a Framework AMD 13 BIOS 3.05 with the matte panel. Link: https://community.frame.work/t/25711/9 Link: https://community.frame.work/t/47036 Signed-off-by: Thomas Wei=C3=9Fschuh Tested-by: Dustin L. Howett Reviewed-by: Mario Limonciello --- drivers/gpu/drm/drm_panel_backlight_quirks.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/drm_panel_backlight_quirks.c b/drivers/gpu/drm= /drm_panel_backlight_quirks.c index 6b8bbed77c7f..f2aefff618dd 100644 --- a/drivers/gpu/drm/drm_panel_backlight_quirks.c +++ b/drivers/gpu/drm/drm_panel_backlight_quirks.c @@ -17,6 +17,14 @@ struct drm_panel_min_backlight_quirk { }; =20 static const struct drm_panel_min_backlight_quirk drm_panel_min_backlight_= quirks[] =3D { + /* 13 inch matte panel */ + { + .dmi_match.field =3D DMI_BOARD_VENDOR, + .dmi_match.value =3D "Framework", + .ident.panel_id =3D drm_edid_encode_panel_id('B', 'O', 'E', 0x0bca), + .ident.name =3D "NE135FBM-N41", + .min_brightness =3D 0, + }, }; =20 static bool drm_panel_min_backlight_quirk_matches(const struct drm_panel_m= in_backlight_quirk *quirk, --=20 2.46.0