From patchwork Fri Mar 18 01:45:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abhinav Kumar X-Patchwork-Id: 12784752 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id EF54AC433F5 for ; Fri, 18 Mar 2022 01:46:08 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 73DD110E92A; Fri, 18 Mar 2022 01:46:00 +0000 (UTC) Received: from alexa-out.qualcomm.com (alexa-out.qualcomm.com [129.46.98.28]) by gabe.freedesktop.org (Postfix) with ESMTPS id 09D9710E90C; Fri, 18 Mar 2022 01:45:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1647567958; x=1679103958; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=I7cDWpfB87yRV868cAXGoyF3SEQbjsN/Egv6GXTDPEU=; b=vpTnglc6ZhOKoN4Lf+fK2LJJzZajXLn1xyYDUy+TtoAU6rfjmyzU7tOM X+nqsYpv5IWZnMCM9zA9mMVyWVbn/vSYu4b1vUzH55zd4OX4UjpMvFwdv aqs2sZdcLmDB2lx8L6Z2Ke5L0mN+5z3kpwoPUr4xcU4N5fM0+cC3HkUrv Y=; Received: from ironmsg07-lv.qualcomm.com ([10.47.202.151]) by alexa-out.qualcomm.com with ESMTP; 17 Mar 2022 18:45:57 -0700 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg07-lv.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Mar 2022 18:45:56 -0700 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Thu, 17 Mar 2022 18:45:55 -0700 Received: from abhinavk-linux.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Thu, 17 Mar 2022 18:45:54 -0700 From: Abhinav Kumar To: Subject: [PATCH v4 2/4] drm: allow real encoder to be passed for drm_writeback_connector Date: Thu, 17 Mar 2022 18:45:34 -0700 Message-ID: <1647567936-11971-3-git-send-email-quic_abhinavk@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1647567936-11971-1-git-send-email-quic_abhinavk@quicinc.com> References: <1647567936-11971-1-git-send-email-quic_abhinavk@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) 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: hamohammed.sa@gmail.com, suraj.kandpal@intel.com, emma@anholt.net, rodrigosiqueiramelo@gmail.com, jani.nikula@intel.com, liviu.dudau@arm.com, Abhinav Kumar , swboyd@chromium.org, melissa.srw@gmail.com, nganji@codeaurora.org, seanpaul@chromium.org, laurent.pinchart@ideasonboard.com, dmitry.baryshkov@linaro.org, james.qian.wang@arm.com, quic_aravindh@quicinc.com, mihail.atanassov@arm.com, freedreno@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" For some vendor driver implementations, display hardware can be shared between the encoder used for writeback and the physical display. In addition resources such as clocks and interrupts can also be shared between writeback and the real encoder. To accommodate such vendor drivers and hardware, allow real encoder to be passed for drm_writeback_connector. changes in v4: - split the possible_crtcs change and the parts which should belong to the addition of new API to the next change Co-developed-by: Kandpal Suraj Signed-off-by: Abhinav Kumar --- drivers/gpu/drm/drm_writeback.c | 12 +++++++----- drivers/gpu/drm/vc4/vc4_txp.c | 14 ++++++++++---- include/drm/drm_writeback.h | 18 ++++++++++++++++-- 3 files changed, 33 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/drm_writeback.c b/drivers/gpu/drm/drm_writeback.c index dc2ef12..a4c17d6 100644 --- a/drivers/gpu/drm/drm_writeback.c +++ b/drivers/gpu/drm/drm_writeback.c @@ -190,11 +190,13 @@ int drm_writeback_connector_init(struct drm_device *dev, if (IS_ERR(blob)) return PTR_ERR(blob); - drm_encoder_helper_add(&wb_connector->encoder, enc_helper_funcs); + drm_encoder_helper_add(wb_connector->encoder, enc_helper_funcs); - wb_connector->encoder.possible_crtcs = possible_crtcs; + wb_connector->encoder = &wb_connector->internal_encoder; - ret = drm_encoder_init(dev, &wb_connector->encoder, + wb_connector->encoder->possible_crtcs = possible_crtcs; + + ret = drm_encoder_init(dev, wb_connector->encoder, &drm_writeback_encoder_funcs, DRM_MODE_ENCODER_VIRTUAL, NULL); if (ret) @@ -208,7 +210,7 @@ int drm_writeback_connector_init(struct drm_device *dev, goto connector_fail; ret = drm_connector_attach_encoder(connector, - &wb_connector->encoder); + wb_connector->encoder); if (ret) goto attach_fail; @@ -237,7 +239,7 @@ int drm_writeback_connector_init(struct drm_device *dev, attach_fail: drm_connector_cleanup(connector); connector_fail: - drm_encoder_cleanup(&wb_connector->encoder); + drm_encoder_cleanup(wb_connector->encoder); fail: drm_property_blob_put(blob); return ret; diff --git a/drivers/gpu/drm/vc4/vc4_txp.c b/drivers/gpu/drm/vc4/vc4_txp.c index 3447eb6..341a9be5 100644 --- a/drivers/gpu/drm/vc4/vc4_txp.c +++ b/drivers/gpu/drm/vc4/vc4_txp.c @@ -151,6 +151,8 @@ struct vc4_txp { struct platform_device *pdev; + struct drm_encoder drm_enc; + struct drm_writeback_connector connector; void __iomem *regs; @@ -159,7 +161,7 @@ struct vc4_txp { static inline struct vc4_txp *encoder_to_vc4_txp(struct drm_encoder *encoder) { - return container_of(encoder, struct vc4_txp, connector.encoder); + return container_of(encoder, struct vc4_txp, drm_enc); } static inline struct vc4_txp *connector_to_vc4_txp(struct drm_connector *conn) @@ -467,6 +469,7 @@ static int vc4_txp_bind(struct device *dev, struct device *master, void *data) struct vc4_txp *txp; struct drm_crtc *crtc; struct drm_encoder *encoder; + struct drm_writeback_connector *wb_conn; int ret, irq; irq = platform_get_irq(pdev, 0); @@ -492,9 +495,12 @@ static int vc4_txp_bind(struct device *dev, struct device *master, void *data) txp->regset.regs = txp_regs; txp->regset.nregs = ARRAY_SIZE(txp_regs); - drm_connector_helper_add(&txp->connector.base, + wb_conn = &txp->connector; + wb_conn->encoder = &txp->drm_enc; + + drm_connector_helper_add(&wb_conn->base, &vc4_txp_connector_helper_funcs); - ret = drm_writeback_connector_init(drm, &txp->connector, + ret = drm_writeback_connector_init(drm, wb_conn, &vc4_txp_connector_funcs, &vc4_txp_encoder_helper_funcs, drm_fmts, ARRAY_SIZE(drm_fmts), @@ -507,7 +513,7 @@ static int vc4_txp_bind(struct device *dev, struct device *master, void *data) if (ret) return ret; - encoder = &txp->connector.encoder; + encoder = txp->connector.encoder; encoder->possible_crtcs = drm_crtc_mask(crtc); ret = devm_request_irq(dev, irq, vc4_txp_interrupt, 0, diff --git a/include/drm/drm_writeback.h b/include/drm/drm_writeback.h index db6214f..c525b60 100644 --- a/include/drm/drm_writeback.h +++ b/include/drm/drm_writeback.h @@ -25,15 +25,29 @@ struct drm_writeback_connector { struct drm_connector base; /** - * @encoder: Internal encoder used by the connector to fulfill + * @encoder: handle to drm_encoder used by the connector to fulfill * the DRM framework requirements. The users of the * @drm_writeback_connector control the behaviour of the @encoder * by passing the @enc_funcs parameter to drm_writeback_connector_init() * function. + * + * For some vendor drivers, the hardware resources are shared between + * writeback encoder and rest of the display pipeline. + * To accommodate such cases, encoder is a handle to the real encoder + * hardware. + * + * For current existing writeback users, this shall continue to be the + * embedded encoder for the writeback connector. */ - struct drm_encoder encoder; + struct drm_encoder *encoder; /** + * @internal_encoder: internal encoder used by writeback when + * a real encoder is not provided by the vendor drm drivers. + * @encoder will be assigned to this for those cases. + */ + struct drm_encoder internal_encoder; + /** * @pixel_formats_blob_ptr: * * DRM blob property data for the pixel formats list on writeback