From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 795CFC64EC4 for ; Fri, 10 Mar 2023 11:46:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229819AbjCJLq6 (ORCPT ); Fri, 10 Mar 2023 06:46:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50544 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229907AbjCJLqv (ORCPT ); Fri, 10 Mar 2023 06:46:51 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B96E41138A4 for ; Fri, 10 Mar 2023 03:46:46 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 364AF61476 for ; Fri, 10 Mar 2023 11:46:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 298B7C433EF; Fri, 10 Mar 2023 11:46:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678448805; bh=RjQFNhZsvfG1RKCUH3I7x7wyBGqH3m14QMjEf2q/gfQ=; h=Subject:To:Cc:From:Date:From; b=DmWQ2ApRZMPL4cNmKeMf1nFsXceX7JzibIVVrLdjO7yBCsWRimL4sFQHyAPoYJjsV U1Ot/JPNvAP+rscLR+m1YWzTQrFNrUDQi+3NXEzKSfH1gbynKueFgbz3PnXsRelTsB VLbdYh8bkMgw32RrrnWe41PBRsDJisLUJHdukkt4= Subject: FAILED: patch "[PATCH] drm/i915: Pick the backlight controller based on VBT on ICP+" failed to apply to 6.1-stable tree To: ville.syrjala@linux.intel.com, jani.nikula@intel.com Cc: From: Date: Fri, 10 Mar 2023 12:46:34 +0100 Message-ID: <1678448794181190@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x c90b155148e9632ae46e6778ee958c319457415f # git commit -s git send-email --to '' --in-reply-to '1678448794181190@kroah.com' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: c90b155148e9 ("drm/i915: Pick the backlight controller based on VBT on ICP+") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From c90b155148e9632ae46e6778ee958c319457415f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Tue, 7 Feb 2023 08:43:37 +0200 Subject: [PATCH] drm/i915: Pick the backlight controller based on VBT on ICP+ MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use the second backlight controller on ICP+ if the VBT asks us to do so. On pre-MTP we also check the chicken bit to make sure the pins have been correctly muxed by the firmware. Cc: stable@vger.kernel.org Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8016 Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20230207064337.18697-4-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula (cherry picked from commit b33771546309b46b681388b3540b69a75a0e2e69) Signed-off-by: Jani Nikula diff --git a/drivers/gpu/drm/i915/display/intel_backlight.c b/drivers/gpu/drm/i915/display/intel_backlight.c index 5b7da72c95b8..a4e4b7f79e4d 100644 --- a/drivers/gpu/drm/i915/display/intel_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_backlight.c @@ -1431,6 +1431,30 @@ bxt_setup_backlight(struct intel_connector *connector, enum pipe unused) return 0; } +static int cnp_num_backlight_controllers(struct drm_i915_private *i915) +{ + if (INTEL_PCH_TYPE(i915) >= PCH_DG1) + return 1; + + if (INTEL_PCH_TYPE(i915) >= PCH_ICP) + return 2; + + return 1; +} + +static bool cnp_backlight_controller_is_valid(struct drm_i915_private *i915, int controller) +{ + if (controller < 0 || controller >= cnp_num_backlight_controllers(i915)) + return false; + + if (controller == 1 && + INTEL_PCH_TYPE(i915) >= PCH_ICP && + INTEL_PCH_TYPE(i915) < PCH_MTP) + return intel_de_read(i915, SOUTH_CHICKEN1) & ICP_SECOND_PPS_IO_SELECT; + + return true; +} + static int cnp_setup_backlight(struct intel_connector *connector, enum pipe unused) { @@ -1440,10 +1464,14 @@ cnp_setup_backlight(struct intel_connector *connector, enum pipe unused) /* * CNP has the BXT implementation of backlight, but with only one - * controller. TODO: ICP has multiple controllers but we only use - * controller 0 for now. + * controller. ICP+ can have two controllers, depending on pin muxing. */ - panel->backlight.controller = 0; + panel->backlight.controller = connector->panel.vbt.backlight.controller; + if (!cnp_backlight_controller_is_valid(i915, panel->backlight.controller)) { + drm_dbg_kms(&i915->drm, "Invalid backlight controller %d, assuming 0\n", + panel->backlight.controller); + panel->backlight.controller = 0; + } pwm_ctl = intel_de_read(i915, BXT_BLC_PWM_CTL(panel->backlight.controller));