From patchwork Fri May 7 23:39:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lyude Paul X-Patchwork-Id: 12245347 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=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 D95D9C433B4 for ; Fri, 7 May 2021 23:40:24 +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 A3E1F61352 for ; Fri, 7 May 2021 23:40:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A3E1F61352 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 083D56E5C6; Fri, 7 May 2021 23:40:24 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 842546E5C1 for ; Fri, 7 May 2021 23:40:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1620430821; 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=SEflwrC7Lb21d2y4unBeYm/fhKbgdBO2ZExkhalIYR0=; b=S8EWRFF76SopAriLfQiggNthjYJrDuVUue1Ad/tR6eNy5Sr7FsxDGMFH4BcXMAZzZL03UY /PYOK4GU8C44suwbSx4L0bKAvqnMTYcXYlfoJ3thMpfklnV4hPImJ53q2pFv+VUVQTVkJ+ oIGuw1BrcGMJziTFpifT2kTXOuqTOmM= 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-344-pqUOlK6pP66dSqdJjds-2g-1; Fri, 07 May 2021 19:40:20 -0400 X-MC-Unique: pqUOlK6pP66dSqdJjds-2g-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id CC428107ACCD; Fri, 7 May 2021 23:40:17 +0000 (UTC) Received: from Ruby.redhat.com (ovpn-112-131.rdu2.redhat.com [10.10.112.131]) by smtp.corp.redhat.com (Postfix) with ESMTP id BF5B910016F4; Fri, 7 May 2021 23:40:14 +0000 (UTC) From: Lyude Paul To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, nouveau@lists.freedesktop.org Subject: [RFC v5 4/9] drm/i915/dpcd_bl: Cache some backlight capabilities in intel_panel.backlight Date: Fri, 7 May 2021 19:39:42 -0400 Message-Id: <20210507233947.751846-5-lyude@redhat.com> In-Reply-To: <20210507233947.751846-1-lyude@redhat.com> References: <20210507233947.751846-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 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: Rajeev Nandan , Jani Nikula , David Airlie , Lucas De Marchi , open list , Anshuman Gupta , greg.depoire@gmail.com, Uma Shankar , Sean Paul , Rodrigo Vivi , Dave Airlie , Gwan-gyeong Mun Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Since we're about to be moving this code into shared DRM helpers, we might as well start to cache certain backlight capabilities that can be determined from the EDP DPCD, and are likely to be relevant to the majority of drivers using said helpers. The main purpose of this is just to prevent every driver from having to check everything against the eDP DPCD using DP macros, which makes the code slightly easier to read (especially since the names of some of the eDP capabilities don't exactly match up with what we actually need to use them for, like DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT for instance). Signed-off-by: Lyude Paul Reviewed-by: Rodrigo Vivi --- .../drm/i915/display/intel_display_types.h | 2 ++ .../drm/i915/display/intel_dp_aux_backlight.c | 29 ++++++++++++------- 2 files changed, 21 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 7054a37363fb..d4a57bce71b1 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -312,6 +312,8 @@ struct intel_panel { struct { u8 pwmgen_bit_count; u8 pwm_freq_pre_divider; + bool lsb_reg_used; + bool aux_enable; } vesa; struct { bool sdr_uses_aux; 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 1ab82933afb5..1d31c33f4867 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -270,13 +270,14 @@ intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pi } /* VESA backlight callbacks */ -static void set_vesa_backlight_enable(struct intel_dp *intel_dp, bool enable) +static void set_vesa_backlight_enable(struct intel_connector *connector, bool enable) { + struct intel_dp *intel_dp = intel_attached_dp(connector); struct drm_i915_private *i915 = dp_to_i915(intel_dp); u8 reg_val = 0; /* Early return when display use other mechanism to enable backlight. */ - if (!(intel_dp->edp_dpcd[1] & DP_EDP_BACKLIGHT_AUX_ENABLE_CAP)) + if (!connector->panel.backlight.edp.vesa.aux_enable) return; if (drm_dp_dpcd_readb(&intel_dp->aux, DP_EDP_DISPLAY_CONTROL_REGISTER, ®_val) != 1) { @@ -339,9 +340,11 @@ static u32 intel_dp_aux_vesa_get_backlight(struct intel_connector *connector, en DP_EDP_BACKLIGHT_BRIGHTNESS_MSB); return 0; } - level = read_val[0]; - if (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT) + + if (connector->panel.backlight.edp.vesa.lsb_reg_used) level = (read_val[0] << 8 | read_val[1]); + else + level = read_val[0]; return level; } @@ -359,13 +362,14 @@ intel_dp_aux_vesa_set_backlight(const struct drm_connector_state *conn_state, struct drm_i915_private *i915 = dp_to_i915(intel_dp); u8 vals[2] = { 0x0 }; - vals[0] = level; - /* Write the MSB and/or LSB */ - if (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT) { + if (connector->panel.backlight.edp.vesa.lsb_reg_used) { vals[0] = (level & 0xFF00) >> 8; vals[1] = (level & 0xFF); + } else { + vals[0] = level; } + if (drm_dp_dpcd_write(&intel_dp->aux, DP_EDP_BACKLIGHT_BRIGHTNESS_MSB, vals, sizeof(vals)) != sizeof(vals)) { drm_dbg_kms(&i915->drm, @@ -419,14 +423,13 @@ intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state, } intel_dp_aux_vesa_set_backlight(conn_state, level); - set_vesa_backlight_enable(intel_dp, true); + set_vesa_backlight_enable(connector, true); } static void intel_dp_aux_vesa_disable_backlight(const struct drm_connector_state *old_conn_state, u32 level) { - set_vesa_backlight_enable(enc_to_intel_dp(to_intel_encoder(old_conn_state->best_encoder)), - false); + set_vesa_backlight_enable(to_intel_connector(old_conn_state->connector), false); } /* @@ -524,8 +527,14 @@ static u32 intel_dp_aux_vesa_calc_max_backlight(struct intel_connector *connecto static int intel_dp_aux_vesa_setup_backlight(struct intel_connector *connector, enum pipe pipe) { + struct intel_dp *intel_dp = intel_attached_dp(connector); struct intel_panel *panel = &connector->panel; + if (intel_dp->edp_dpcd[1] & DP_EDP_BACKLIGHT_AUX_ENABLE_CAP) + panel->backlight.edp.vesa.aux_enable = true; + if (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT) + panel->backlight.edp.vesa.lsb_reg_used = true; + panel->backlight.max = intel_dp_aux_vesa_calc_max_backlight(connector); if (!panel->backlight.max) return -ENODEV;