From patchwork Mon Jul 1 06:26:27 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Manna, Animesh" X-Patchwork-Id: 11025075 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 73221138B for ; Mon, 1 Jul 2019 06:34:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 76AD628329 for ; Mon, 1 Jul 2019 06:34:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6A44A284DA; Mon, 1 Jul 2019 06:34:34 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 6AD8728329 for ; Mon, 1 Jul 2019 06:34:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EC1AE89F53; Mon, 1 Jul 2019 06:34:32 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id BA37C89F53 for ; Mon, 1 Jul 2019 06:34:31 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 Jun 2019 23:34:31 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,437,1557212400"; d="scan'208";a="153988726" Received: from amanna.iind.intel.com ([10.223.74.216]) by orsmga007.jf.intel.com with ESMTP; 30 Jun 2019 23:34:29 -0700 From: Animesh Manna To: intel-gfx@lists.freedesktop.org Date: Mon, 1 Jul 2019 11:56:27 +0530 Message-Id: <20190701062632.456-11-animesh.manna@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190701062632.456-1-animesh.manna@intel.com> References: <20190701062632.456-1-animesh.manna@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 10/15] drm/i915/dsb: function to trigger workload execution of DSB. X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jani Nikula Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Batch buffer will be created through dsb-reg-write function which can have single/multiple request based on usecase and once the buffer is ready commit function will trigger the execution of the batch buffer. All the registers will be updated simultaneously. Cc: Imre Deak Cc: Jani Nikula Cc: Rodrigo Vivi Signed-off-by: Animesh Manna --- drivers/gpu/drm/i915/intel_dsb.c | 43 ++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_dsb.h | 1 + 2 files changed, 44 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dsb.c b/drivers/gpu/drm/i915/intel_dsb.c index 33c812019cec..0270f4fef600 100644 --- a/drivers/gpu/drm/i915/intel_dsb.c +++ b/drivers/gpu/drm/i915/intel_dsb.c @@ -190,3 +190,46 @@ void intel_dsb_reg_write(struct intel_dsb *dsb, i915_reg_t reg, u32 val) DSB_OPCODE_SHIFT) | DSB_BYTE_EN | i915_mmio_reg_offset(reg); } + +void intel_dsb_commit(struct intel_dsb *dsb) +{ + struct intel_crtc *crtc = dsb->crtc; + struct drm_device *dev = crtc->base.dev; + struct drm_i915_private *dev_priv = to_i915(dev); + enum pipe pipe = crtc->pipe; + u32 cmd_buf_tail, cmd_buf_size; + + if (!dsb->free_pos) + return; + + if (!intel_dsb_enable_engine(dsb)) + goto reset; + + if (is_dsb_busy(dsb)) { + DRM_DEBUG_KMS("HEAD_PTR write failed - dsb engine is busy.\n"); + goto reset; + } + I915_WRITE(DSB_HEAD_PTR(pipe, dsb->id), dsb->cmd_buf_head); + + cmd_buf_size = dsb->free_pos * 4; + cmd_buf_tail = round_up((dsb->cmd_buf_head + cmd_buf_size), + CACHELINE_BYTES); + + if (is_dsb_busy(dsb)) { + DRM_DEBUG_KMS("TAIL_PTR write failed - dsb engine is busy.\n"); + goto reset; + } + DRM_DEBUG_KMS("DSB execution started - buf-size %u, head 0x%x," + "tail 0x%x\n", cmd_buf_size, dsb->cmd_buf_head, + cmd_buf_tail); + I915_WRITE(DSB_TAIL_PTR(pipe, dsb->id), cmd_buf_tail); + if (wait_for(!is_dsb_busy(dsb), 1)) { + DRM_ERROR("Timed out waiting for DSB workload completion.\n"); + goto reset; + } + +reset: + memset(dsb->cmd_buf, 0, DSB_BUF_SIZE); + dsb->free_pos = 0; + intel_dsb_disable_engine(dsb); +} diff --git a/drivers/gpu/drm/i915/intel_dsb.h b/drivers/gpu/drm/i915/intel_dsb.h index 1fa893cc8c2e..7330add3c96f 100644 --- a/drivers/gpu/drm/i915/intel_dsb.h +++ b/drivers/gpu/drm/i915/intel_dsb.h @@ -42,5 +42,6 @@ struct intel_dsb { struct intel_dsb * intel_dsb_get(struct intel_crtc *crtc); void intel_dsb_reg_write(struct intel_dsb *dsb, i915_reg_t reg, u32 val); +void intel_dsb_commit(struct intel_dsb *dsb); #endif