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 087AB6110; Tue, 5 Dec 2023 03:25:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="N71ZXjfA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8FD80C433C7; Tue, 5 Dec 2023 03:25:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1701746715; bh=nM0n2/qtk8FlXqQ0XatNqjqg4manBbpHR50SHnMHFH8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N71ZXjfATsiyzeN6iOMt+mlb71bQ5b5YGwgnYr7V40JGSf3B71P7xYgRcNqZInGbr 330LPKIhnHZ+TltmhhnByVzHGImZrIfCW4v8kuj89BQYz04unhOVj89+BIEFPigP7W 2nkZxP7IxNgEHjYA8j18ADvq2PDhsLdv+xPwpKGc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Agustin Gutierrez , Roman Li , Swapnil Patel , Daniel Wheeler , Alex Deucher , Sasha Levin Subject: [PATCH 6.6 128/134] drm/amd/display: Reduce default backlight min from 5 nits to 1 nits Date: Tue, 5 Dec 2023 12:16:40 +0900 Message-ID: <20231205031543.563083819@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231205031535.163661217@linuxfoundation.org> References: <20231205031535.163661217@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Swapnil Patel [ Upstream commit 5edb7cdff85af8f8c5fda5b88310535ab823f663 ] [Why & How] Currently set_default_brightness_aux function uses 5 nits as lower limit to check for valid default_backlight setting. However some newer panels can support even lower default settings Reviewed-by: Agustin Gutierrez Acked-by: Roman Li Signed-off-by: Swapnil Patel Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Stable-dep-of: d9e865826c20 ("drm/amd/display: Simplify brightness initialization") Signed-off-by: Sasha Levin --- .../amd/display/dc/link/protocols/link_edp_panel_control.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c index e1708c296b7df..a602202610e09 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c @@ -281,8 +281,8 @@ bool set_default_brightness_aux(struct dc_link *link) if (link && link->dpcd_sink_ext_caps.bits.oled == 1) { if (!read_default_bl_aux(link, &default_backlight)) default_backlight = 150000; - // if < 5 nits or > 5000, it might be wrong readback - if (default_backlight < 5000 || default_backlight > 5000000) + // if < 1 nits or > 5000, it might be wrong readback + if (default_backlight < 1000 || default_backlight > 5000000) default_backlight = 150000; // return edp_set_backlight_level_nits(link, true, -- 2.42.0