From patchwork Wed Feb 5 15:24:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Manna, Animesh" X-Patchwork-Id: 11366457 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 56EFB139A for ; Wed, 5 Feb 2020 15:35:41 +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 3FBC120659 for ; Wed, 5 Feb 2020 15:35:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3FBC120659 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 380706E9B8; Wed, 5 Feb 2020 15:35:40 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id CEB376E9B8 for ; Wed, 5 Feb 2020 15:35:38 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Feb 2020 07:35:38 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,406,1574150400"; d="scan'208";a="404185280" Received: from amanna.iind.intel.com ([10.223.74.53]) by orsmga005.jf.intel.com with ESMTP; 05 Feb 2020 07:35:35 -0800 From: Animesh Manna To: intel-gfx@lists.freedesktop.org Date: Wed, 5 Feb 2020 20:54:48 +0530 Message-Id: <20200205152448.2679-1-animesh.manna@intel.com> X-Mailer: git-send-email 2.24.0 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v2] drm/i915/dsb: Pre allocate and late cleanup of cmd buffer X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jani Nikula , Daniel Vetter Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Pre-allocate command buffer in atomic_commit using intel_dsb_prepare function which also includes pinning and map in cpu domain. No change is dsb write/commit functions. Now dsb get/put function is refactored and currently used only for reference counting. Below dsb api added to do respective job mentioned below. intel_dsb_prepare - Allocate, pin and map the buffer. intel_dsb_cleanup - Unpin and release the gem object. RFC: Initial patch for design review. v2: included _init() part in _prepare(). [Daniel, Ville] Cc: Ville Syrjälä Cc: Jani Nikula Cc: Daniel Vetter Signed-off-by: Animesh Manna --- drivers/gpu/drm/i915/display/intel_atomic.c | 2 + drivers/gpu/drm/i915/display/intel_display.c | 13 ++ drivers/gpu/drm/i915/display/intel_dsb.c | 132 ++++++++++++------- drivers/gpu/drm/i915/display/intel_dsb.h | 2 + 4 files changed, 101 insertions(+), 48 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c index 379c12f3b1d4..949272e60a04 100644 --- a/drivers/gpu/drm/i915/display/intel_atomic.c +++ b/drivers/gpu/drm/i915/display/intel_atomic.c @@ -290,7 +290,9 @@ intel_crtc_destroy_state(struct drm_crtc *crtc, struct drm_crtc_state *state) { struct intel_crtc_state *crtc_state = to_intel_crtc_state(state); + struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->uapi.crtc); + intel_dsb_cleanup(intel_crtc); __drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi); intel_crtc_free_hw_state(crtc_state); kfree(crtc_state); diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 368e481d45ee..4e3b422f0a29 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -15076,6 +15076,19 @@ static int intel_atomic_check(struct drm_device *dev, static int intel_atomic_prepare_commit(struct intel_atomic_state *state) { + struct intel_crtc_state *crtc_state; + struct intel_crtc *crtc; + int i; + + for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) { + bool mode_changed = needs_modeset(crtc_state); + + if (mode_changed || crtc_state->update_pipe || + crtc_state->uapi.color_mgmt_changed) { + intel_dsb_prepare(crtc); + } + } + return drm_atomic_helper_prepare_planes(state->base.dev, &state->base); } diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 76ae01277fd6..fc9fc23b5fc1 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -34,6 +34,86 @@ #define DSB_BYTE_EN_SHIFT 20 #define DSB_REG_VALUE_MASK 0xfffff +/** + * intel_dsb_prepare() - Allocate, pin and map the DSB command buffer. + * @crtc: intel_crtc structure to get pipe info. + * + * This function prepare the command buffer which is used to store dsb + * instructions with data. + */ + +void intel_dsb_prepare(struct intel_crtc *crtc) +{ + struct drm_device *dev = crtc->base.dev; + struct drm_i915_private *i915 = to_i915(dev); + struct intel_dsb *dsb = &crtc->dsb; + struct drm_i915_gem_object *obj; + struct i915_vma *vma; + u32 *buf; + intel_wakeref_t wakeref; + + if (!HAS_DSB(i915) || dsb->cmd_buf) + return; + + wakeref = intel_runtime_pm_get(&i915->runtime_pm); + + obj = i915_gem_object_create_internal(i915, DSB_BUF_SIZE); + if (IS_ERR(obj)) { + DRM_ERROR("Gem object creation failed\n"); + goto out; + } + + vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0); + if (IS_ERR(vma)) { + DRM_ERROR("Vma creation failed\n"); + i915_gem_object_put(obj); + goto out; + } + + buf = i915_gem_object_pin_map(vma->obj, I915_MAP_WC); + if (IS_ERR(buf)) { + DRM_ERROR("Command buffer creation failed\n"); + goto out; + } + + dsb->id = DSB1; + dsb->vma = vma; + dsb->cmd_buf = buf; + +out: + /* + * On error dsb->cmd_buf will continue to be NULL, making the writes + * pass-through. Leave the dangling ref to be removed later by the + * corresponding intel_dsb_put(): the important error message will + * already be logged above. + */ + + intel_runtime_pm_put(&i915->runtime_pm, wakeref); +} + +/** + * intel_dsb_cleanup() - To cleanup DSB context. + * @dsb: intel_dsb structure. + * + * This function cleanup the DSB context by unpinning and releasing + * the VMA object associated with it. + */ + +void intel_dsb_cleanup(struct intel_crtc *crtc) +{ + struct drm_i915_private *i915 = to_i915(crtc->base.dev); + struct intel_dsb *dsb = &crtc->dsb; + + if (!HAS_DSB(i915)) + return; + + if (!dsb->vma) { + i915_vma_unpin_and_release(&dsb->vma, I915_VMA_RELEASE_MAP); + dsb->vma = NULL; + dsb->cmd_buf = NULL; + } +} + static inline bool is_dsb_busy(struct intel_dsb *dsb) { struct intel_crtc *crtc = container_of(dsb, typeof(*crtc), dsb); @@ -84,14 +164,13 @@ static inline bool intel_dsb_disable_engine(struct intel_dsb *dsb) } /** - * intel_dsb_get() - Allocate DSB context and return a DSB instance. + * intel_dsb_get() - Return a DSB instance and increase ref-count. * @crtc: intel_crtc structure to get pipe info. * * This function provides handle of a DSB instance, for the further DSB * operations. * * Returns: address of Intel_dsb instance requested for. - * Failure: Returns the same DSB instance, but without a command buffer. */ struct intel_dsb * @@ -100,52 +179,11 @@ intel_dsb_get(struct intel_crtc *crtc) struct drm_device *dev = crtc->base.dev; struct drm_i915_private *i915 = to_i915(dev); struct intel_dsb *dsb = &crtc->dsb; - struct drm_i915_gem_object *obj; - struct i915_vma *vma; - u32 *buf; - intel_wakeref_t wakeref; if (!HAS_DSB(i915)) return dsb; - if (dsb->refcount++ != 0) - return dsb; - - wakeref = intel_runtime_pm_get(&i915->runtime_pm); - - obj = i915_gem_object_create_internal(i915, DSB_BUF_SIZE); - if (IS_ERR(obj)) { - DRM_ERROR("Gem object creation failed\n"); - goto out; - } - - vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0); - if (IS_ERR(vma)) { - DRM_ERROR("Vma creation failed\n"); - i915_gem_object_put(obj); - goto out; - } - - buf = i915_gem_object_pin_map(vma->obj, I915_MAP_WC); - if (IS_ERR(buf)) { - DRM_ERROR("Command buffer creation failed\n"); - goto out; - } - - dsb->id = DSB1; - dsb->vma = vma; - dsb->cmd_buf = buf; - -out: - /* - * On error dsb->cmd_buf will continue to be NULL, making the writes - * pass-through. Leave the dangling ref to be removed later by the - * corresponding intel_dsb_put(): the important error message will - * already be logged above. - */ - - intel_runtime_pm_put(&i915->runtime_pm, wakeref); - + dsb->refcount++; return dsb; } @@ -153,8 +191,8 @@ intel_dsb_get(struct intel_crtc *crtc) * intel_dsb_put() - To destroy DSB context. * @dsb: intel_dsb structure. * - * This function destroys the DSB context allocated by a dsb_get(), by - * unpinning and releasing the VMA object associated with it. + * This function decrease the reference count and reset the command + * buffer position. */ void intel_dsb_put(struct intel_dsb *dsb) @@ -169,8 +207,6 @@ void intel_dsb_put(struct intel_dsb *dsb) return; if (--dsb->refcount == 0) { - i915_vma_unpin_and_release(&dsb->vma, I915_VMA_RELEASE_MAP); - dsb->cmd_buf = NULL; dsb->free_pos = 0; dsb->ins_start_offset = 0; } diff --git a/drivers/gpu/drm/i915/display/intel_dsb.h b/drivers/gpu/drm/i915/display/intel_dsb.h index 395ef9ce558e..1dcce198899a 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.h +++ b/drivers/gpu/drm/i915/display/intel_dsb.h @@ -41,6 +41,8 @@ struct intel_dsb { u32 ins_start_offset; }; +void intel_dsb_prepare(struct intel_crtc *crtc); +void intel_dsb_cleanup(struct intel_crtc *crtc); struct intel_dsb * intel_dsb_get(struct intel_crtc *crtc); void intel_dsb_put(struct intel_dsb *dsb);