From patchwork Tue Sep 7 15:15:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raphael Gallais-Pou X-Patchwork-Id: 12478965 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=-17.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 22DE6C433F5 for ; Tue, 7 Sep 2021 15:19:53 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 D3DCB6112E for ; Tue, 7 Sep 2021 15:19:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org D3DCB6112E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=foss.st.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=55bFMr5Z/PPkT2RqrREG2rGezun2YgJpULIL0FiBdUg=; b=LiFtpWSigqHhTU oe47MuqJwDvBUF+0FphM1kRnkhjflL+bf4182tWPjW63vkxjGawBybcTSv9hY6kU0unTKRXp8K63S PAV6HgUFkQL3E9ottmj3zy89rkbk6yOmRQmAdA4Jj8ZyX5/dbcdHZeBb2OlJdBX2bjb5xvqZuFOfR GMyLEp42h/P4LE8BYdfa9azB3kV+VdBfL3Xtdoe4YlR6re2zh2mYklqCEtNuX4d/pOqo/QMJPNifS Tw3QFKS9zyPaRPr3R++iPaj1A62KkThOYbqa4A4BHjx4fp1ngMRYd1zaR2aFdrmP3LH1UQXuAPt2P 6e4fXaqiiGTDMW0KnhXQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mNcr3-0040xl-Rv; Tue, 07 Sep 2021 15:17:46 +0000 Received: from mx07-00178001.pphosted.com ([185.132.182.106]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mNcqz-0040ut-9a for linux-arm-kernel@lists.infradead.org; Tue, 07 Sep 2021 15:17:42 +0000 Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.1.2/8.16.0.43) with SMTP id 187Eun7c017194; Tue, 7 Sep 2021 17:17:32 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=selector1; bh=Z3kLq+iRfOzStH8O3le61AdJ+iVekYXxLeWKDMeJ8KA=; b=su13Up+Nlw1v0E/ZGKxVRciKeB31ArDhisMq3fGZ4BIB/0YizHXqKKvubD/W1gc2cKGL vUs1yfkedxw7y+pJo5SPhYk1djVnO9QPDOW38ODkcBnY+HB4RwNz2vnDUCzKeKTHYF6A PNnk/0uHOT/LezrbDS1DOsxJm4Z1RvBlaH1bXhSeRqfuxmgcWKH5ivFWk0CW6pRblbe7 dcPbFB7o59uQaEv2Vapa1+Olz9v8Sj5Jid6ae7A+uH4b3jHU5LdYl+UTXdwU3ZfEw0l/ yWGHuRq8FyvVN/hfwKn7XJUjs4L3Bjdxcu7Km2xPQ5UScxhg8nf1kMJFBLyyXtdJO7D9 mQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 3awyx2um6h-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 07 Sep 2021 17:17:32 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 2683310002A; Tue, 7 Sep 2021 17:17:31 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag1node3.st.com [10.75.127.3]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 1629D22A6C9; Tue, 7 Sep 2021 17:17:31 +0200 (CEST) Received: from localhost (10.75.127.46) by SFHDAG1NODE3.st.com (10.75.127.3) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Tue, 7 Sep 2021 17:17:30 +0200 From: Raphael Gallais-Pou To: Yannick Fertre , Philippe Cornu , Benjamin Gaignard CC: David Airlie , Daniel Vetter , "Maxime Coquelin" , Alexandre Torgue , , , , , Raphael Gallais-Pou , Raphael Gallais-Pou Subject: [PATCH v2] drm/stm: ltdc: add layer alpha support Date: Tue, 7 Sep 2021 17:15:34 +0200 Message-ID: <20210907151534.6013-1-raphael.gallais-pou@foss.st.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.75.127.46] X-ClientProxiedBy: SFHDAG1NODE1.st.com (10.75.127.1) To SFHDAG1NODE3.st.com (10.75.127.3) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.182.1,Aquarius:18.0.790,Hydra:6.0.391,FMLib:17.0.607.475 definitions=2021-09-07_05,2021-09-07_01,2020-04-07_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210907_081741_686851_906B06DA X-CRM114-Status: GOOD ( 15.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Android Hardware Composer supports alpha values applied to layers. Enabling non-opaque layers for the STM CRTC could help offload GPU resources for screen composition. Signed-off-by: Raphael Gallais-Pou Acked-by: Yannick Fertre Reviewed-by: Yannick Fertre --- drivers/gpu/drm/stm/ltdc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 195de30eb90c..e0fef8bacfa8 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -845,7 +845,7 @@ static void ltdc_plane_atomic_update(struct drm_plane *plane, LXCFBLR_CFBLL | LXCFBLR_CFBP, val); /* Specifies the constant alpha value */ - val = CONSTA_MAX; + val = newstate->alpha >> 8; reg_update_bits(ldev->regs, LTDC_L1CACR + lofs, LXCACR_CONSTA, val); /* Specifies the blending factors */ @@ -997,6 +997,8 @@ static struct drm_plane *ltdc_plane_create(struct drm_device *ddev, drm_plane_helper_add(plane, <dc_plane_helper_funcs); + drm_plane_create_alpha_property(plane); + DRM_DEBUG_DRIVER("plane:%d created\n", plane->base.id); return plane;