From patchwork Mon Aug 12 20:18:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Patchwork-Id: 13761003 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 85BECC3DA7F for ; Mon, 12 Aug 2024 20:19:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 11D9C10E2B4; Mon, 12 Aug 2024 20:19:09 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=weissschuh.net header.i=@weissschuh.net header.b="ny3fa5vy"; dkim-atps=neutral Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6CF0810E2B1; Mon, 12 Aug 2024 20:19:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1723493938; bh=BWJbYz4Ub7mQ5CuwnhoOXgqPePDi17e865opfTFh60s=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=ny3fa5vyVfXKTHiFvpTsA1RVev7fRPSkTxJDkvNQM+Aa2nlQ3je/Ot4EmdbemC9fc wpzsZd5Eju26eR8JAY55jlhmfM+bIKgTG55huU65OexH6vzgYKQBlvr4QOKcScYMWM wq9ioVrtNzG8Qq9hDGgVYDvnR6GOaDr7XBx3XmP4= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Mon, 12 Aug 2024 22:18:31 +0200 Subject: [PATCH v4 2/3] drm: panel-backlight-quirks: Add Framework 13 matte panel MIME-Version: 1.0 Message-Id: <20240812-amdgpu-min-backlight-quirk-v4-2-56a63ff897b7@weissschuh.net> References: <20240812-amdgpu-min-backlight-quirk-v4-0-56a63ff897b7@weissschuh.net> In-Reply-To: <20240812-amdgpu-min-backlight-quirk-v4-0-56a63ff897b7@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=1723493938; l=1373; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=BWJbYz4Ub7mQ5CuwnhoOXgqPePDi17e865opfTFh60s=; b=NNVA/8iyr9FIDcoAH08HQmmpU1RiSN3SRCEJir1m0YnH4crtGDvOrkA/NvQtbPmzXe5UfvXz3 YcGLZIN2wdJB2VH4COtgmhtfwd5IAyWoFJiyFAiEKsq3KgFdgUTUTmY X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 Weißschuh --- 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 a88e77db97c5..c58344cdbb6e 100644 --- a/drivers/gpu/drm/drm_panel_backlight_quirks.c +++ b/drivers/gpu/drm/drm_panel_backlight_quirks.c @@ -16,6 +16,14 @@ struct drm_panel_min_backlight_quirk { }; static const struct drm_panel_min_backlight_quirk drm_panel_min_backlight_quirks[] = { + /* 13 inch matte panel */ + { + .dmi_match.field = DMI_BOARD_VENDOR, + .dmi_match.value = "Framework", + .ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E', 0x0bca), + .ident.name = "NE135FBM-N41", + .min_brightness = 0, + }, }; static bool drm_panel_min_backlight_quirk_matches(const struct drm_panel_min_backlight_quirk *quirk,