From patchwork Fri Aug 17 14:58:37 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Imre Deak X-Patchwork-Id: 10569003 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 152F915E2 for ; Fri, 17 Aug 2018 15:00:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 05F812BC6F for ; Fri, 17 Aug 2018 15:00:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EDDA92BC7B; Fri, 17 Aug 2018 14:59:59 +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 6D11E2BC6F for ; Fri, 17 Aug 2018 14:59:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4D8F96E659; Fri, 17 Aug 2018 14:59:58 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id E03066E659 for ; Fri, 17 Aug 2018 14:59:56 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Aug 2018 07:59:56 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.53,251,1531810800"; d="scan'208";a="76178208" Received: from ideak-desk.fi.intel.com ([10.237.72.62]) by orsmga003.jf.intel.com with ESMTP; 17 Aug 2018 07:59:34 -0700 From: Imre Deak To: intel-gfx@lists.freedesktop.org Date: Fri, 17 Aug 2018 17:58:37 +0300 Message-Id: <20180817145837.26592-1-imre.deak@intel.com> X-Mailer: git-send-email 2.13.2 In-Reply-To: <20180817131802.10610-1-imre.deak@intel.com> References: <20180817131802.10610-1-imre.deak@intel.com> Subject: [Intel-gfx] [PATCH v3] drm/i915: Verify power domains after enabling them 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: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP After commit 2cd9a689e97b ("drm/i915: Refactor intel_display_set_init_power() logic") it makes more sense to check the power domain/well refcounts after enabling the power domains functionality. Before that it's guaranteed that most power wells (in the INIT domain) will have a reference held, so not an interesting state. While at it also add the check after the init_hw/fini_hw, disable and suspend/resume steps. Make the test optional on a Kconfig option since it may add substantial overhead: on VLV/CHV the corresponding PUNIT reg access for each power well may take up to 20ms. v2: - Add the state check to more spots. (Chris) v3: - During suspend check the state before deiniting display core. Afterwards DC states are disabled (and so the dc_off power well is enabled) even though we don't hold a reference on it. - Do the test conditionally based on a new Kconfig option. (Chris) Cc: Chris Wilson Signed-off-by: Imre Deak Reviewed-by: Chris Wilson (v2) Reviewed-by: Chris Wilson --- drivers/gpu/drm/i915/Kconfig.debug | 12 +++++++++++ drivers/gpu/drm/i915/intel_display.c | 2 -- drivers/gpu/drm/i915/intel_drv.h | 1 - drivers/gpu/drm/i915/intel_runtime_pm.c | 36 +++++++++++++++++++++++++++------ 4 files changed, 42 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/i915/Kconfig.debug b/drivers/gpu/drm/i915/Kconfig.debug index 459f8f88a34c..9e36ffb5eb7c 100644 --- a/drivers/gpu/drm/i915/Kconfig.debug +++ b/drivers/gpu/drm/i915/Kconfig.debug @@ -30,6 +30,7 @@ config DRM_I915_DEBUG select SW_SYNC # signaling validation framework (igt/syncobj*) select DRM_I915_SW_FENCE_DEBUG_OBJECTS select DRM_I915_SELFTEST + select DRM_I915_DEBUG_RUNTIME_PM default n help Choose this option to turn on extra driver debugging that may affect @@ -167,3 +168,14 @@ config DRM_I915_DEBUG_VBLANK_EVADE the vblank. If in doubt, say "N". + +config DRM_I915_DEBUG_RUNTIME_PM + bool "Enable extra state checking for runtime PM" + depends on DRM_I915 + default n + help + Choose this option to turn on extra state checking for the + runtime PM functionality. This may introduce overhead during + driver loading, suspend and resume operations. + + If in doubt, say "N" diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 09d62b0c62cb..ad0f0e5389d9 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -15907,8 +15907,6 @@ intel_modeset_setup_hw_state(struct drm_device *dev, intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); - intel_power_domains_verify_state(dev_priv); - intel_fbc_init_pipe_state(dev_priv); } diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index d0402051925b..529e72bcc5ef 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1966,7 +1966,6 @@ enum i915_drm_suspend_mode { void intel_power_domains_suspend(struct drm_i915_private *dev_priv, enum i915_drm_suspend_mode); void intel_power_domains_resume(struct drm_i915_private *dev_priv); -void intel_power_domains_verify_state(struct drm_i915_private *dev_priv); void bxt_display_core_init(struct drm_i915_private *dev_priv, bool resume); void bxt_display_core_uninit(struct drm_i915_private *dev_priv); void intel_runtime_pm_enable(struct drm_i915_private *dev_priv); diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 6153d5be5cf6..f1263f8f40ac 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -3716,6 +3716,8 @@ static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv) cmn->desc->ops->disable(dev_priv, cmn); } +static void intel_power_domains_verify_state(struct drm_i915_private *dev_priv); + /** * intel_power_domains_init_hw - initialize hardware power domain state * @dev_priv: i915 device instance @@ -3767,6 +3769,8 @@ void intel_power_domains_init_hw(struct drm_i915_private *dev_priv, bool resume) intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); intel_power_domains_sync_hw(dev_priv); power_domains->initializing = false; + + intel_power_domains_verify_state(dev_priv); } /** @@ -3788,6 +3792,8 @@ void intel_power_domains_fini_hw(struct drm_i915_private *dev_priv) /* Remove the refcount we took to keep power well support disabled. */ if (!i915_modparams.disable_power_well) intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); + + intel_power_domains_verify_state(dev_priv); } /** @@ -3805,6 +3811,8 @@ void intel_power_domains_fini_hw(struct drm_i915_private *dev_priv) void intel_power_domains_enable(struct drm_i915_private *dev_priv) { intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); + + intel_power_domains_verify_state(dev_priv); } /** @@ -3817,6 +3825,8 @@ void intel_power_domains_enable(struct drm_i915_private *dev_priv) void intel_power_domains_disable(struct drm_i915_private *dev_priv) { intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); + + intel_power_domains_verify_state(dev_priv); } /** @@ -3845,15 +3855,19 @@ void intel_power_domains_suspend(struct drm_i915_private *dev_priv, * firmware was inactive. */ if (!IS_GEN9_LP(dev_priv) && suspend_mode == I915_DRM_SUSPEND_IDLE && - dev_priv->csr.dmc_payload != NULL) + dev_priv->csr.dmc_payload != NULL) { + intel_power_domains_verify_state(dev_priv); return; + } /* * Even if power well support was disabled we still want to disable * power wells if power domains must be deinitialized for suspend. */ - if (!i915_modparams.disable_power_well) + if (!i915_modparams.disable_power_well) { intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); + intel_power_domains_verify_state(dev_priv); + } if (IS_ICELAKE(dev_priv)) icl_display_core_uninit(dev_priv); @@ -3884,11 +3898,11 @@ void intel_power_domains_resume(struct drm_i915_private *dev_priv) if (power_domains->display_core_suspended) { intel_power_domains_init_hw(dev_priv, true); power_domains->display_core_suspended = false; - - return; + } else { + intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); } - intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); + intel_power_domains_verify_state(dev_priv); } static void intel_power_domains_dump_info(struct drm_i915_private *dev_priv) @@ -3919,7 +3933,9 @@ static void intel_power_domains_dump_info(struct drm_i915_private *dev_priv) * acquiring reference counts for any power wells in use and disabling the * ones left on by BIOS but not required by any active output. */ -void intel_power_domains_verify_state(struct drm_i915_private *dev_priv) +#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM) + +static void intel_power_domains_verify_state(struct drm_i915_private *dev_priv) { struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *power_well; @@ -3974,6 +3990,14 @@ void intel_power_domains_verify_state(struct drm_i915_private *dev_priv) mutex_unlock(&power_domains->lock); } +#else + +static void intel_power_domains_verify_state(struct drm_i915_private *dev_priv) +{ +} + +#endif + /** * intel_runtime_pm_get - grab a runtime pm reference * @dev_priv: i915 device instance