From patchwork Thu Sep 3 11:23:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 11753315 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 74C2414E3 for ; Thu, 3 Sep 2020 11:24:56 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 5316F2078E for ; Thu, 3 Sep 2020 11:24:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="DSlh9/gE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5316F2078E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 206766E9CD; Thu, 3 Sep 2020 11:24:55 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id E303B6E9C8 for ; Thu, 3 Sep 2020 11:24:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1599132291; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yBZnW0uEhs9/IogdfbWxz1WbKxUqUn2zepvhTOAX9YU=; b=DSlh9/gECHMIm0+0YFuDsRSGIn8/VbBhaZUaRmzLOJZIJC+kzfu7buZ81+L3s3DglVmBAN g0uYPfczsQWHnMaxuZWQ+o8tR1GJpnFR/a2IbHwCEA/AxamTVAscoNonZGHKYQkzHtqcO+ 8W4SubG6+UNGp0axV/NLjV42yW8/vy0= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-448-qa9iJHyvMaC3FbI8_BYOBQ-1; Thu, 03 Sep 2020 07:24:50 -0400 X-MC-Unique: qa9iJHyvMaC3FbI8_BYOBQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5430A640C2; Thu, 3 Sep 2020 11:24:48 +0000 (UTC) Received: from x1.localdomain (ovpn-113-3.ams2.redhat.com [10.36.113.3]) by smtp.corp.redhat.com (Postfix) with ESMTP id EE8BD5C1C2; Thu, 3 Sep 2020 11:24:44 +0000 (UTC) From: Hans de Goede To: Thierry Reding , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , "Rafael J . Wysocki" , Len Brown Date: Thu, 3 Sep 2020 13:23:36 +0200 Message-Id: <20200903112337.4113-17-hdegoede@redhat.com> In-Reply-To: <20200903112337.4113-1-hdegoede@redhat.com> References: <20200903112337.4113-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Subject: [Intel-gfx] [PATCH v10 16/17] drm/i915: panel: Honor the VBT PWM min setting for devs with an external PWM controller X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-pwm@vger.kernel.org, linux-acpi@vger.kernel.org, Jani Nikula , intel-gfx , dri-devel@lists.freedesktop.org, Andy Shevchenko , Mika Westerberg Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" So far for devices using an external PWM controller (devices using pwm_setup_backlight()), we have been hardcoding the minimum allowed PWM level to 0. But several of these devices specify a non 0 minimum setting in their VBT. Change pwm_setup_backlight() to use get_backlight_min_vbt() to get the minimum level. Acked-by: Jani Nikula Signed-off-by: Hans de Goede --- drivers/gpu/drm/i915/display/intel_panel.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c index 5a13089d2fc0..2b27f9b07403 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.c +++ b/drivers/gpu/drm/i915/display/intel_panel.c @@ -1925,8 +1925,8 @@ static int pwm_setup_backlight(struct intel_connector *connector, */ pwm_apply_args(panel->backlight.pwm); - panel->backlight.min = 0; /* 0% */ panel->backlight.max = 100; /* 100% */ + panel->backlight.min = get_backlight_min_vbt(connector); level = intel_panel_compute_brightness(connector, 100); ns = DIV_ROUND_UP(level * panel->backlight.pwm_period_ns, 100); @@ -1941,8 +1941,9 @@ static int pwm_setup_backlight(struct intel_connector *connector, level = DIV_ROUND_UP_ULL(pwm_get_duty_cycle(panel->backlight.pwm) * 100, panel->backlight.pwm_period_ns); - panel->backlight.level = - intel_panel_compute_brightness(connector, level); + level = intel_panel_compute_brightness(connector, level); + panel->backlight.level = clamp(level, panel->backlight.min, + panel->backlight.max); panel->backlight.enabled = panel->backlight.level != 0; drm_info(&dev_priv->drm, "Using %s PWM for LCD backlight control\n",