From patchwork Thu Jul 20 09:25:16 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jani Nikula X-Patchwork-Id: 9854389 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 07879600F5 for ; Thu, 20 Jul 2017 09:25:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0003228749 for ; Thu, 20 Jul 2017 09:25:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E86F728765; Thu, 20 Jul 2017 09:25:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 748C728749 for ; Thu, 20 Jul 2017 09:25:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BD0D56E638; Thu, 20 Jul 2017 09:25:32 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTPS id DA8E06E638 for ; Thu, 20 Jul 2017 09:25:30 +0000 (UTC) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Jul 2017 02:25:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.40,383,1496127600"; d="scan'208";a="880802712" Received: from mmetzger-mobl4.ger.corp.intel.com (HELO localhost) ([10.252.43.104]) by FMSMGA003.fm.intel.com with ESMTP; 20 Jul 2017 02:25:26 -0700 From: Jani Nikula To: intel-gfx@lists.freedesktop.org Date: Thu, 20 Jul 2017 12:25:16 +0300 Message-Id: <051eeb592361985d2d06333c61c220dd92253b09.1500542254.git.jani.nikula@intel.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Cc: jani.nikula@intel.com, Daniel Vetter , Puthikorn Voravootivat , Jenny TC , Dhinakaran Pandiyan Subject: [Intel-gfx] [PATCH 1/2] Revert "drm/i915: Add option to support dynamic backlight via DPCD" X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP This reverts commit ae25eceab616d16a07bcaa434b84463d58a3bdc3. The DPCD backlight commits regress a Thinkpad X1 Carbon 4th Gen and a BXT-P (in CI). Enabling dynamic backlight boots to a black screen, and enabling DPCD backlight leads to a black screen after suspend/resume. References: http://mid.mail-archive.com/20170706135349.6tu3lz7uehazlnnn@boom References: http://mid.mail-archive.com/20170627132326.f2q3yn4bh5flji4q@boom Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101619 Reported-by: David Weinehall Fixes: ae25eceab616 ("drm/i915: Add option to support dynamic backlight via DPCD") Cc: Jenny TC Cc: David Weinehall Cc: Puthikorn Voravootivat Cc: Dhinakaran Pandiyan Cc: Daniel Vetter Cc: intel-gfx@lists.freedesktop.org Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/i915_params.c | 5 ----- drivers/gpu/drm/i915/i915_params.h | 3 +-- drivers/gpu/drm/i915/intel_dp_aux_backlight.c | 26 -------------------------- 3 files changed, 1 insertion(+), 33 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index 88b9d3e6713a..5b5ab15d191f 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -65,7 +65,6 @@ struct i915_params i915 __read_mostly = { .inject_load_failure = 0, .enable_dpcd_backlight = -1, .enable_gvt = false, - .enable_dbc = true, }; module_param_named(modeset, i915.modeset, int, 0400); @@ -255,7 +254,3 @@ MODULE_PARM_DESC(enable_dpcd_backlight, module_param_named(enable_gvt, i915.enable_gvt, bool, 0400); MODULE_PARM_DESC(enable_gvt, "Enable support for Intel GVT-g graphics virtualization host support(default:false)"); - -module_param_named_unsafe(enable_dbc, i915.enable_dbc, bool, 0600); -MODULE_PARM_DESC(enable_dbc, - "Enable support for dynamic backlight control (default:true)"); diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h index 057e203e6bda..0d6cf9138dc4 100644 --- a/drivers/gpu/drm/i915/i915_params.h +++ b/drivers/gpu/drm/i915/i915_params.h @@ -67,8 +67,7 @@ func(bool, verbose_state_checks); \ func(bool, nuclear_pageflip); \ func(bool, enable_dp_mst); \ - func(bool, enable_gvt); \ - func(bool, enable_dbc) + func(bool, enable_gvt) #define MEMBER(T, member) T member struct i915_params { diff --git a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c index b25cd88fc1c5..fea161727c6e 100644 --- a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c @@ -173,24 +173,6 @@ static bool intel_dp_aux_set_pwm_freq(struct intel_connector *connector) return true; } -/* -* Set minimum / maximum dynamic brightness percentage. This value is expressed -* as the percentage of normal brightness in 5% increments. -*/ -static bool -intel_dp_aux_set_dynamic_backlight_percent(struct intel_dp *intel_dp, - u32 min, u32 max) -{ - u8 dbc[] = { DIV_ROUND_CLOSEST(min, 5), DIV_ROUND_CLOSEST(max, 5) }; - - if (drm_dp_dpcd_write(&intel_dp->aux, DP_EDP_DBC_MINIMUM_BRIGHTNESS_SET, - dbc, sizeof(dbc)) < 0) { - DRM_DEBUG_KMS("Failed to write aux DBC brightness level\n"); - return false; - } - return true; -} - static void intel_dp_aux_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state) { @@ -226,14 +208,6 @@ static void intel_dp_aux_enable_backlight(const struct intel_crtc_state *crtc_st if (intel_dp_aux_set_pwm_freq(connector)) new_dpcd_buf |= DP_EDP_BACKLIGHT_FREQ_AUX_SET_ENABLE; - if (i915.enable_dbc && - (intel_dp->edp_dpcd[2] & DP_EDP_DYNAMIC_BACKLIGHT_CAP)) { - if(intel_dp_aux_set_dynamic_backlight_percent(intel_dp, 0, 100)) { - new_dpcd_buf |= DP_EDP_DYNAMIC_BACKLIGHT_ENABLE; - DRM_DEBUG_KMS("Enable dynamic brightness.\n"); - } - } - if (new_dpcd_buf != dpcd_buf) { if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_EDP_BACKLIGHT_MODE_SET_REGISTER, new_dpcd_buf) < 0) {