From patchwork Tue Jan 24 23:49:31 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dhinakaran Pandiyan X-Patchwork-Id: 9536165 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 86EBB6042D for ; Tue, 24 Jan 2017 23:51:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7AE782787C for ; Tue, 24 Jan 2017 23:51:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6F9D627BA5; Tue, 24 Jan 2017 23:51:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0DCDC2787C for ; Tue, 24 Jan 2017 23:51:08 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B61B96E8B6; Tue, 24 Jan 2017 23:51:06 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 418726E8AA; Tue, 24 Jan 2017 23:51:04 +0000 (UTC) Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga105.jf.intel.com with ESMTP; 24 Jan 2017 15:51:04 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,281,1477983600"; d="scan'208";a="217227253" Received: from nuc-skylake.jf.intel.com ([10.54.75.136]) by fmsmga004.fm.intel.com with ESMTP; 24 Jan 2017 15:51:03 -0800 From: Dhinakaran Pandiyan To: intel-gfx@lists.freedesktop.org Date: Tue, 24 Jan 2017 15:49:31 -0800 Message-Id: <1485301777-3465-4-git-send-email-dhinakaran.pandiyan@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1485301777-3465-1-git-send-email-dhinakaran.pandiyan@intel.com> References: <1485301777-3465-1-git-send-email-dhinakaran.pandiyan@intel.com> Cc: Alex Deucher , Daniel Vetter , Dhinakaran Pandiyan , dri-devel@lists.freedesktop.org, Ben Skeggs Subject: [Intel-gfx] [PATCH v2 3/9] drm/dp: Split drm_dp_mst_allocate_vcpi X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP drm_dp_mst_allocate_vcpi() apart from setting up the vcpi structure, also finds if there are enough slots available. This check is a duplicate of that implemented in drm_dp_mst_find_vcpi_slots(). Let's move this check out and reuse the existing drm_dp_mst_find_vcpi_slots() function to check if there are enough vcpi slots before allocating them. This brings the check to one place. Additionally drivers that will use MST state tracking for atomic modesets can use the atomic version of find_vcpi_slots() and reuse drm_dp_mst_allocate_vcpi() Signed-off-by: Dhinakaran Pandiyan Reviewed-by: Dave Airlie --- drivers/gpu/drm/drm_dp_mst_topology.c | 20 +++++++++----------- drivers/gpu/drm/i915/intel_dp_mst.c | 4 ++-- drivers/gpu/drm/nouveau/nv50_display.c | 3 ++- drivers/gpu/drm/radeon/radeon_dp_mst.c | 4 +++- include/drm/drm_dp_mst_helper.h | 2 +- 5 files changed, 17 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index d9edd84..b871d4e 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -2479,20 +2479,17 @@ int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, EXPORT_SYMBOL(drm_dp_find_vcpi_slots); static int drm_dp_init_vcpi(struct drm_dp_mst_topology_mgr *mgr, - struct drm_dp_vcpi *vcpi, int pbn) + struct drm_dp_vcpi *vcpi, int pbn, int slots) { - int num_slots; int ret; - num_slots = DIV_ROUND_UP(pbn, mgr->pbn_div); - /* max. time slots - one slot for MTP header */ - if (num_slots > 63) + if (slots > 63) return -ENOSPC; vcpi->pbn = pbn; - vcpi->aligned_pbn = num_slots * mgr->pbn_div; - vcpi->num_slots = num_slots; + vcpi->aligned_pbn = slots * mgr->pbn_div; + vcpi->num_slots = slots; ret = drm_dp_mst_assign_payload_id(mgr, vcpi); if (ret < 0) @@ -2507,7 +2504,7 @@ static int drm_dp_init_vcpi(struct drm_dp_mst_topology_mgr *mgr, * @pbn: payload bandwidth number to request * @slots: returned number of slots for this PBN. */ -bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int *slots) +bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int slots) { int ret; @@ -2515,16 +2512,18 @@ bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp if (!port) return false; + if (slots < 0) + return false; + if (port->vcpi.vcpi > 0) { DRM_DEBUG_KMS("payload: vcpi %d already allocated for pbn %d - requested pbn %d\n", port->vcpi.vcpi, port->vcpi.pbn, pbn); if (pbn == port->vcpi.pbn) { - *slots = port->vcpi.num_slots; drm_dp_put_port(port); return true; } } - ret = drm_dp_init_vcpi(mgr, &port->vcpi, pbn); + ret = drm_dp_init_vcpi(mgr, &port->vcpi, pbn, slots); if (ret) { DRM_DEBUG_KMS("failed to init vcpi slots=%d max=63 ret=%d\n", DIV_ROUND_UP(pbn, mgr->pbn_div), ret); @@ -2532,7 +2531,6 @@ bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp } DRM_DEBUG_KMS("initing vcpi for pbn=%d slots=%d\n", pbn, port->vcpi.num_slots); - *slots = port->vcpi.num_slots; drm_dp_put_port(port); return true; diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c index 38e3ca2..f51574f 100644 --- a/drivers/gpu/drm/i915/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/intel_dp_mst.c @@ -147,7 +147,6 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder, to_intel_connector(conn_state->connector); int ret; uint32_t temp; - int slots; /* MST encoders are bound to a crtc, not to a connector, * force the mapping here for get_hw_state. @@ -177,7 +176,8 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder, ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, connector->port, - pipe_config->pbn, &slots); + pipe_config->pbn, + pipe_config->dp_m_n.tu); if (ret == false) { DRM_ERROR("failed to allocate vcpi\n"); return; diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c index 452da48..91a4875 100644 --- a/drivers/gpu/drm/nouveau/nv50_display.c +++ b/drivers/gpu/drm/nouveau/nv50_display.c @@ -2959,7 +2959,8 @@ nv50_msto_enable(struct drm_encoder *encoder) if (WARN_ON(!mstc)) return; - r = drm_dp_mst_allocate_vcpi(&mstm->mgr, mstc->port, mstc->pbn, &slots); + slots = drm_dp_find_vcpi_slots(&mstm->mgr, mstc->pbn); + r = drm_dp_mst_allocate_vcpi(&mstm->mgr, mstc->port, mstc->pbn, slots); WARN_ON(!r); if (mstm->outp->dcb->sorconf.link & 1) diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c index 7d5ada3..6598306 100644 --- a/drivers/gpu/drm/radeon/radeon_dp_mst.c +++ b/drivers/gpu/drm/radeon/radeon_dp_mst.c @@ -453,9 +453,11 @@ radeon_mst_encoder_dpms(struct drm_encoder *encoder, int mode) DRM_DEBUG_KMS("dig encoder is %d %d %d\n", dig_enc->dig_encoder, dig_enc->linkb, radeon_crtc->crtc_id); + slots = drm_dp_find_vcpi_slots(&radeon_connector->mst_port->mst_mgr, + mst_enc->pbn); ret = drm_dp_mst_allocate_vcpi(&radeon_connector->mst_port->mst_mgr, radeon_connector->port, - mst_enc->pbn, &slots); + mst_enc->pbn, slots); ret = drm_dp_update_payload_part1(&radeon_connector->mst_port->mst_mgr); radeon_dp_mst_set_be_cntl(primary, mst_enc, diff --git a/include/drm/drm_dp_mst_helper.h b/include/drm/drm_dp_mst_helper.h index b0f4a09..98d3c73 100644 --- a/include/drm/drm_dp_mst_helper.h +++ b/include/drm/drm_dp_mst_helper.h @@ -568,7 +568,7 @@ struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_ int drm_dp_calc_pbn_mode(int clock, int bpp); -bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int *slots); +bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int slots); int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);