From patchwork Tue Jun 22 13:31:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lee Shawn C X-Patchwork-Id: 12337437 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 851C1C2B9F4 for ; Tue, 22 Jun 2021 13:25:31 +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 4CED36112D for ; Tue, 22 Jun 2021 13:25:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4CED36112D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.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 E2DC26E0CB; Tue, 22 Jun 2021 13:25:30 +0000 (UTC) Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id 490606E0CB for ; Tue, 22 Jun 2021 13:25:29 +0000 (UTC) IronPort-SDR: EobNP4KbLH1ng6qLkY8CLqkxko94EIMX0fQuFGjyADBFYLVasnRko1ElsmlnxdmJs/HsFlZVxG GhJdzXuMHTsA== X-IronPort-AV: E=McAfee;i="6200,9189,10022"; a="206996466" X-IronPort-AV: E=Sophos;i="5.83,291,1616482800"; d="scan'208";a="206996466" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jun 2021 06:25:28 -0700 IronPort-SDR: bg+eXxW92EeQyj1bWSPVaxx7sXIyyGXPvlsTyVkoPeJCrHUZ8O0hO6SLQM+cdtO+LsDpReZZxT TKrt1VFXuuVg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.83,291,1616482800"; d="scan'208";a="480810959" Received: from shawnle1-build-machine.itwn.intel.com ([10.5.253.12]) by FMSMGA003.fm.intel.com with ESMTP; 22 Jun 2021 06:25:26 -0700 From: Lee Shawn C To: intel-gfx@lists.freedesktop.org Date: Tue, 22 Jun 2021 21:31:07 +0800 Message-Id: <20210622133107.7422-1-shawn.c.lee@intel.com> X-Mailer: git-send-email 2.17.1 Subject: [Intel-gfx] [PATCH] drm/i915: keep backlight_enable on until turn eDP display off 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: Cooper Chiou MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This workaround is specific for a particular panel on Google chromebook project. When user space daemon enter idle state. It request adjust brightness to 0, turn backlight_enable signal off and keep eDP main link active. On general LCD, this behavior might not be a problem. But on this panel, its tcon would expect source to execute full eDP power off sequence after drop backlight_enable signal. Without eDP power off sequence. Even source try to turn backlight_enable signal on and restore proper brightness level. This panel is not able to light on again. This WA ignored the request from user space daemon to disable backlight_enable signal and keep it on always. When user space request kernel to turn eDP display off, kernel driver still can control backlight_enable signal properly. It would not impact standard eDP power off sequence. Cc: Ville Syrjala Cc: Imre Deak Cc: Jani Nikula Cc: Cooper Chiou Signed-off-by: Lee Shawn C --- drivers/gpu/drm/i915/display/intel_panel.c | 4 ++- drivers/gpu/drm/i915/display/intel_quirks.c | 34 +++++++++++++++++++++ drivers/gpu/drm/i915/i915_drv.h | 1 + 3 files changed, 38 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c index 7d7a60b4d2de..0212b53d932b 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.c +++ b/drivers/gpu/drm/i915/display/intel_panel.c @@ -1311,6 +1311,7 @@ static void intel_panel_set_backlight(const struct drm_connector_state *conn_sta static int intel_backlight_device_update_status(struct backlight_device *bd) { struct intel_connector *connector = bl_get_data(bd); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; struct drm_device *dev = connector->base.dev; @@ -1330,7 +1331,8 @@ static int intel_backlight_device_update_status(struct backlight_device *bd) if (panel->backlight.power) { bool enable = bd->props.power == FB_BLANK_UNBLANK && bd->props.brightness != 0; - panel->backlight.power(connector, enable); + if (enable || !(dev_priv->quirks & QUIRK_KEEP_BACKLIGHT_ENABLE_ON)) + panel->backlight.power(connector, enable); } } else { bd->props.power = FB_BLANK_POWERDOWN; diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c b/drivers/gpu/drm/i915/display/intel_quirks.c index 98dd787b00e3..ed57b083edbb 100644 --- a/drivers/gpu/drm/i915/display/intel_quirks.c +++ b/drivers/gpu/drm/i915/display/intel_quirks.c @@ -53,6 +53,12 @@ static void quirk_increase_ddi_disabled_time(struct drm_i915_private *i915) drm_info(&i915->drm, "Applying Increase DDI Disabled quirk\n"); } +static void quirk_keep_backlight_enable_on(struct drm_i915_private *i915) +{ + i915->quirks |= QUIRK_KEEP_BACKLIGHT_ENABLE_ON; + drm_info(&i915->drm, "applying keep backlight enable on quirk\n"); +} + struct intel_quirk { int device; int subsystem_vendor; @@ -72,6 +78,12 @@ static int intel_dmi_reverse_brightness(const struct dmi_system_id *id) return 1; } +static int backlight_wa_callback(const struct dmi_system_id *id) +{ + DRM_INFO("This is WA to ignore backlight off to prevent OLED panel issue on %s device\n", id->ident); + return 1; +} + static const struct intel_dmi_quirk intel_dmi_quirks[] = { { .dmi_id_list = &(const struct dmi_system_id[]) { @@ -96,6 +108,28 @@ static const struct intel_dmi_quirk intel_dmi_quirks[] = { }, .hook = quirk_invert_brightness, }, + { + .dmi_id_list = &(const struct dmi_system_id[]) { + { + .callback = backlight_wa_callback, + .ident = "Google Lillipup", + .matches = {DMI_MATCH(DMI_BOARD_VENDOR, "Google"), + DMI_MATCH(DMI_BOARD_NAME, "Lindar"), + DMI_MATCH(DMI_PRODUCT_SKU, "sku524294"), + }, + }, + { + .callback = backlight_wa_callback, + .ident = "Google Lillipup", + .matches = {DMI_MATCH(DMI_BOARD_VENDOR, "Google"), + DMI_MATCH(DMI_BOARD_NAME, "Lindar"), + DMI_MATCH(DMI_PRODUCT_SKU, "sku524295"), + }, + }, + { } + }, + .hook = quirk_keep_backlight_enable_on, + }, }; static struct intel_quirk intel_quirks[] = { diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 01e11fe38642..8103919bf3b4 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -467,6 +467,7 @@ struct i915_drrs { #define QUIRK_PIN_SWIZZLED_PAGES (1<<5) #define QUIRK_INCREASE_T12_DELAY (1<<6) #define QUIRK_INCREASE_DDI_DISABLED_TIME (1<<7) +#define QUIRK_KEEP_BACKLIGHT_ENABLE_ON (1<<8) struct intel_fbdev; struct intel_fbc_work;