From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5CF4CB67E; Sun, 9 Aug 2026 00:04:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786233873; cv=none; b=eIiU/L5ROyRtLf7narn/z7ottS8C3BsCzE7nGciqSXvh/Q+RkExfbHe0BF4FzV/03MYgv6/qxnwmm7kR6ZbMunAtEECX/aT+oHzBgWmh9al65KZXUow6t/LPkubFgRMqtdysE9YO3tcZzq7p8XwOokauL1FA8NZ8z48dyk2Sis4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786233873; c=relaxed/simple; bh=Q5gz2v8bYWQslzNBTJ1xlxfRqwopRF15rgQ23wMNCuc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=PdFTpmtwa9Mq5MMqNBdq7Qo0ckj/hbi2VyhutUdK9we2k5lnvGfYwTnZAQzKWEXzlnnkGt9ZWhdBDxKpaYbG+miJEwKwbiC36s5+D5iEGcJpq94FFdX3Dva8yWJCcucpDlufM7GjkXKV0oN4JKPneab9EuCn+JfvydZDRXXTsjI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lzWfThO0; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lzWfThO0" Received: by smtp.kernel.org (Postfix) with ESMTPS id 02E55C2BCF4; Sun, 9 Aug 2026 00:04:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1786233873; bh=Q5gz2v8bYWQslzNBTJ1xlxfRqwopRF15rgQ23wMNCuc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=lzWfThO0wMIfgMFYJHlZmZ8yjnNSQxQbYhCs+jzFbFVYvrJRgmE5ZRnwkE2cyBUkM I9ThtoH5173vWCdfHmJvRudXzdmFi995Q69wfa/dolEKPTjXE9Au2kIZvkCIFUZfjy RYjCv2CNdHdOkJp7J9HyaORUSQcpVkAfeqCeoux9WrfDMA1sXzJQ/npb7zX7cRlsXh nREz0m6sjxK1loABlz17q58Ap6C51+XZG9YuKRAJIM2GRA+m6mejbD13jquj8Wv78E rgWP2LI1btbOrvC6a321HKZrTc9VOshxLH9BvnrGPqX85dRWs8XORyVxgI5d7boQcY 738uKvl7QovVw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id D6225C5AD56; Sun, 9 Aug 2026 00:04:32 +0000 (UTC) From: David Heidelberg via B4 Relay Date: Sun, 09 Aug 2026 02:04:30 +0200 Subject: [PATCH 2/2] drm/panel: lg-sw43408: use the full DCS brightness range 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: 7bit Message-Id: <20260809-fix-blueline-panel-v1-2-e7f3a6beb1fa@ixit.cz> References: <20260809-fix-blueline-panel-v1-0-e7f3a6beb1fa@ixit.cz> In-Reply-To: <20260809-fix-blueline-panel-v1-0-e7f3a6beb1fa@ixit.cz> To: Sumit Semwal , Casey Connolly , Neil Armstrong , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Dmitry Baryshkov , Marijn Suijten , Vinod Koul Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org, David Heidelberg X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1475; i=david@ixit.cz; h=from:subject:message-id; bh=9Sj5Sfou+YL+MgcWCgbCBmFq0YdzuWI03Hr+YrwTrPw=; b=owEBbQKS/ZANAwAIAWACP8TTSSByAcsmYgBqd8QPDMiWGz8fmUCuEv9NIEAGDI1RWROZ0cwgr NyhfPKqjg6JAjMEAAEIAB0WIQTXegnP7twrvVOnBHRgAj/E00kgcgUCanfEDwAKCRBgAj/E00kg clwzD/wJz5nN78t32Wzxp27u+8kzstzpq+6tlucYY9SEarB8lgv5YRGnAlK0jh1LjHugJC2ZH0d V4j7nXhQQ7EM/axe9lIj1Lkf8g6nfnBiIy5i3B//bc72Jap8wZAp4y9CoG5qUj+F0H0h84F/jUo 7fCcgG4hcP9ve6yYylIsZXQMX7s9mVRLqYC62j5VFWK/vVyHcVi4dx+GmgJpeUCFHvk/9ObnvxG 7kqL1JW/Jo/eN2xJ/6caHpTOnlouIK+ehySXSaDQZ69k5a8+9zcnZTys4flHboabf8n4WuMJynF 2XyREMZe0gyUI214ah4Mm2fXziud1/J8V53VMCLmwk/TNuTd/LMF7j4Dyyn90UZejoAUoQ6EhY5 Cgb3jwazQLJnuz9gMFXGbih+EmA2vKzFWS7zSOGMHYT/4Tt9TOhO84hBDWH/FK7RLQIjZqgaExT wUpdL+5dNVK8XE6fLFoXUXEDJRF1uMdRycvguWtUwjpN+13tG/ulnLFvqIJnoMva93BcLj3H9MU uo8rR1xQOpQ7GovuymgbNzAcy5X+YGlwPDkBlf9GibhVHyZLVfXQDHdNLLSQii8UOAhHHamDHC+ JGczGRVFt6d1BABNe3mhSehM6LUvycZsdiM4jqqwjq3unFDhq5l/I0efmlYORRxMWakoT77tzHW WrSywwZcLtuu1vA== X-Developer-Key: i=david@ixit.cz; a=openpgp; fpr=D77A09CFEEDC2BBD53A7047460023FC4D3492072 X-Endpoint-Received: by B4 Relay for david@ixit.cz/default with auth_id=355 X-Original-From: David Heidelberg Reply-To: david@ixit.cz From: David Heidelberg The vendor firmware panel configuration (XBL DisplayDxe panel XML) declares DCSMaxBrightness 0x332 with a two-byte brightness command, and the driver already sends two bytes via mipi_dsi_dcs_set_display_brightness_large(). Capping max_brightness at 255 therefore limits the panel to ~31% of its real brightness range. Use the firmware maximum. Fixes: 069a6c0e94f9 ("drm: panel: Add LG sw43408 panel driver") Signed-off-by: David Heidelberg --- drivers/gpu/drm/panel/panel-lg-sw43408.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-lg-sw43408.c b/drivers/gpu/drm/panel/panel-lg-sw43408.c index 0bf8e08f10b9c..332b15b6a4c94 100644 --- a/drivers/gpu/drm/panel/panel-lg-sw43408.c +++ b/drivers/gpu/drm/panel/panel-lg-sw43408.c @@ -202,18 +202,18 @@ static const struct backlight_ops sw43408_backlight_ops = { .update_status = sw43408_backlight_update_status, }; static int sw43408_backlight_init(struct sw43408_panel *ctx) { struct device *dev = &ctx->link->dev; const struct backlight_properties props = { .type = BACKLIGHT_PLATFORM, - .brightness = 255, - .max_brightness = 255, + .brightness = 256, + .max_brightness = 818, }; ctx->base.backlight = devm_backlight_device_register(dev, dev_name(dev), dev, ctx->link, &sw43408_backlight_ops, &props); if (IS_ERR(ctx->base.backlight)) -- 2.55.0