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 X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 0111BC4361B for ; Fri, 4 Dec 2020 22:37:01 +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 BE64C22D05 for ; Fri, 4 Dec 2020 22:37:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BE64C22D05 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B52CC6EC92; Fri, 4 Dec 2020 22:36:59 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 631F96EC94 for ; Fri, 4 Dec 2020 22:36:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1607121417; 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=mtFGz+xr8ZTzNuIvtSs0J3PJEBaoOpZ5xtvC9fGE1tk=; b=Mz7ItBhoZ+DQJ1XpbUPQEQYlpRcXXtKLzK2G4q1jQrnmrblI8eEuMypWPv0iOszRdbWA+z 7c2PHDQoREs/qex7qwR4YgQI2fq7tDZbA6WaYioO4ZQkyQQ4lzfGHqgSdGARDvwZF8Io26 Hk6/rvAMuDtZ198EiHLFX0zSwSF4nZo= 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-277-9He1obtkMzOmu_G3fd0HKg-1; Fri, 04 Dec 2020 17:36:53 -0500 X-MC-Unique: 9He1obtkMzOmu_G3fd0HKg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5E56D802B45; Fri, 4 Dec 2020 22:36:51 +0000 (UTC) Received: from Whitewolf.redhat.com (ovpn-112-159.rdu2.redhat.com [10.10.112.159]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0F23319635; Fri, 4 Dec 2020 22:36:49 +0000 (UTC) From: Lyude Paul To: Rodrigo Vivi , Jani Nikula , Dave Airlie , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH v3 8/9] drm/i915/dp: Allow forcing specific interfaces through enable_dpcd_backlight Date: Fri, 4 Dec 2020 17:36:02 -0500 Message-Id: <20201204223603.249878-9-lyude@redhat.com> In-Reply-To: <20201204223603.249878-1-lyude@redhat.com> References: <20201204223603.249878-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thaytan@noraisin.net, Juha-Pekka Heikkila , David Airlie , open list , Vasily Khoruzhick , Sean Paul Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Since we now support controlling panel backlights through DPCD using both the standard VESA interface, and Intel's proprietary HDR backlight interface, we should allow the user to be able to explicitly choose between one or the other in the event that we're wrong about panels reliably reporting support for the Intel HDR interface. So, this commit adds support for this by introducing two new enable_dpcd_backlight options: 2 which forces i915 to only probe for the VESA interface, and 3 which forces i915 to only probe for the Intel backlight interface (might be useful if we find panels in the wild that report the VESA interface in their VBT, but actually only support the Intel backlight interface). v3: * Rebase Signed-off-by: Lyude Paul Cc: thaytan@noraisin.net Cc: Vasily Khoruzhick --- .../drm/i915/display/intel_dp_aux_backlight.c | 45 +++++++++++++++++-- drivers/gpu/drm/i915/i915_params.c | 2 +- 2 files changed, 43 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c index 9a3ff3ffc158..eef14ab6bddc 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -609,15 +609,54 @@ static const struct intel_panel_bl_funcs intel_dp_vesa_bl_funcs = { .get = intel_dp_aux_vesa_get_backlight, }; +enum intel_dp_aux_backlight_modparam { + INTEL_DP_AUX_BACKLIGHT_AUTO = -1, + INTEL_DP_AUX_BACKLIGHT_OFF = 0, + INTEL_DP_AUX_BACKLIGHT_ON = 1, + INTEL_DP_AUX_BACKLIGHT_FORCE_VESA = 2, + INTEL_DP_AUX_BACKLIGHT_FORCE_INTEL = 3, +}; + int intel_dp_aux_init_backlight_funcs(struct intel_connector *connector) { struct drm_device *dev = connector->base.dev; struct intel_panel *panel = &connector->panel; struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder); struct drm_i915_private *i915 = dp_to_i915(intel_dp); + bool try_intel_interface = false, try_vesa_interface = false; - if (i915->params.enable_dpcd_backlight == 0) + /* Check the VBT and user's module parameters to figure out which + * interfaces to probe + */ + switch (i915->params.enable_dpcd_backlight) { + case INTEL_DP_AUX_BACKLIGHT_OFF: return -ENODEV; + case INTEL_DP_AUX_BACKLIGHT_AUTO: + switch (i915->vbt.backlight.type) { + case INTEL_BACKLIGHT_VESA_EDP_AUX_INTERFACE: + try_vesa_interface = true; + break; + case INTEL_BACKLIGHT_DISPLAY_DDI: + try_intel_interface = true; + try_vesa_interface = true; + break; + default: + return -ENODEV; + } + break; + case INTEL_DP_AUX_BACKLIGHT_ON: + if (i915->vbt.backlight.type != INTEL_BACKLIGHT_VESA_EDP_AUX_INTERFACE) + try_intel_interface = true; + + try_vesa_interface = true; + break; + case INTEL_DP_AUX_BACKLIGHT_FORCE_VESA: + try_vesa_interface = true; + break; + case INTEL_DP_AUX_BACKLIGHT_FORCE_INTEL: + try_intel_interface = true; + break; + } /* * A lot of eDP panels in the wild will report supporting both the @@ -626,13 +665,13 @@ int intel_dp_aux_init_backlight_funcs(struct intel_connector *connector) * and will only work with the Intel interface. So, always probe for * that first. */ - if (intel_dp_aux_supports_hdr_backlight(connector)) { + if (try_intel_interface && intel_dp_aux_supports_hdr_backlight(connector)) { drm_dbg(dev, "Using Intel proprietary eDP backlight controls\n"); panel->backlight.funcs = &intel_dp_hdr_bl_funcs; return 0; } - if (intel_dp_aux_supports_vesa_backlight(connector)) { + if (try_vesa_interface && intel_dp_aux_supports_vesa_backlight(connector)) { drm_dbg(dev, "Using VESA eDP backlight controls\n"); panel->backlight.funcs = &intel_dp_vesa_bl_funcs; return 0; diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index 7f139ea4a90b..6939634e56ed 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -185,7 +185,7 @@ i915_param_named_unsafe(inject_probe_failure, uint, 0400, i915_param_named(enable_dpcd_backlight, int, 0400, "Enable support for DPCD backlight control" - "(-1=use per-VBT LFP backlight type setting [default], 0=disabled, 1=enabled)"); + "(-1=use per-VBT LFP backlight type setting [default], 0=disabled, 1=enable, 2=force VESA interface, 3=force Intel interface)"); #if IS_ENABLED(CONFIG_DRM_I915_GVT) i915_param_named(enable_gvt, bool, 0400, -- 2.28.0 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel