From patchwork Fri Nov 1 17:19:53 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Imre Deak X-Patchwork-Id: 3126741 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6AF519F3C4 for ; Fri, 1 Nov 2013 17:20:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 23DBB20498 for ; Fri, 1 Nov 2013 17:20:20 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 1BBB820173 for ; Fri, 1 Nov 2013 17:20:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 596FCF0709; Fri, 1 Nov 2013 10:20:16 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTP id 273E8F0705 for ; Fri, 1 Nov 2013 10:20:12 -0700 (PDT) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 01 Nov 2013 10:20:11 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.93,618,1378882800"; d="scan'208";a="426567308" Received: from intelbox.fi.intel.com (HELO localhost) ([10.237.72.105]) by fmsmga002.fm.intel.com with ESMTP; 01 Nov 2013 10:20:10 -0700 From: Imre Deak To: intel-gfx@lists.freedesktop.org Date: Fri, 1 Nov 2013 19:19:53 +0200 Message-Id: <1383326394-3933-8-git-send-email-imre.deak@intel.com> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1383326394-3933-1-git-send-email-imre.deak@intel.com> References: <1383326394-3933-1-git-send-email-imre.deak@intel.com> Subject: [Intel-gfx] [PATCH 7/8] drm/i915: add a default always-on power well X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: intel-gfx-bounces@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org X-Spam-Status: No, score=-4.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP So far we distinguished platforms without a dynamic power well with the HAS_POWER_WELL macro and for such platforms we didn't call any power domain functions. Instead of doing this check we can add an always-on power well for these platforms and call the power domain functions unconditionally. For always-on power wells we only increase/decrease their refcounts, otherwise they are a nop. This makes high level driver code more readable and as a bonus provides some idea of the current power domains state for all platforms (once the relevant debugfs entry is added). Signed-off-by: Imre Deak --- drivers/gpu/drm/i915/i915_dma.c | 18 +++++++----------- drivers/gpu/drm/i915/i915_drv.h | 1 - drivers/gpu/drm/i915/intel_pm.c | 29 ++++++++++------------------- 3 files changed, 17 insertions(+), 31 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 0cab2d0..b57c3da 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1639,8 +1639,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) goto out_gem_unload; } - if (HAS_POWER_WELL(dev)) - intel_power_domains_init(dev); + intel_power_domains_init(dev); if (drm_core_check_feature(dev, DRIVER_MODESET)) { ret = i915_load_modeset_init(dev); @@ -1667,8 +1666,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) return 0; out_power_well: - if (HAS_POWER_WELL(dev)) - intel_power_domains_remove(dev); + intel_power_domains_remove(dev); drm_vblank_cleanup(dev); out_gem_unload: if (dev_priv->mm.inactive_shrinker.scan_objects) @@ -1706,13 +1704,11 @@ int i915_driver_unload(struct drm_device *dev) intel_gpu_ips_teardown(); - if (HAS_POWER_WELL(dev)) { - /* The i915.ko module is still not prepared to be loaded when - * the power well is not enabled, so just enable it in case - * we're going to unload/reload. */ - intel_display_set_init_power(dev, true); - intel_power_domains_remove(dev); - } + /* The i915.ko module is still not prepared to be loaded when + * the power well is not enabled, so just enable it in case + * we're going to unload/reload. */ + intel_display_set_init_power(dev, true); + intel_power_domains_remove(dev); i915_teardown_sysfs(dev); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 555a6fc..05365e3 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1795,7 +1795,6 @@ struct drm_i915_file_private { #define HAS_IPS(dev) (IS_ULT(dev)) #define HAS_DDI(dev) (INTEL_INFO(dev)->has_ddi) -#define HAS_POWER_WELL(dev) (IS_HASWELL(dev)) #define HAS_FPGA_DBG_UNCLAIMED(dev) (INTEL_INFO(dev)->has_fpga_dbg) #define HAS_PSR(dev) (IS_HASWELL(dev)) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index ba4baf1..f35cb5d 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5540,9 +5540,6 @@ bool intel_display_power_enabled(struct drm_device *dev, bool is_enabled; int i; - if (!HAS_POWER_WELL(dev)) - return true; - power_domains = &dev_priv->power_domains; is_enabled = true; @@ -5634,9 +5631,6 @@ void intel_display_power_get(struct drm_device *dev, struct i915_power_well *power_well; int i; - if (!HAS_POWER_WELL(dev)) - return; - power_domains = &dev_priv->power_domains; mutex_lock(&power_domains->lock); @@ -5653,9 +5647,6 @@ void intel_display_power_put(struct drm_device *dev, struct i915_power_well *power_well; int i; - if (!HAS_POWER_WELL(dev)) - return; - power_domains = &dev_priv->power_domains; mutex_lock(&power_domains->lock); @@ -5694,6 +5685,14 @@ void i915_release_power_well(void) } EXPORT_SYMBOL_GPL(i915_release_power_well); +static struct i915_power_well intel_power_wells[] = { + { + .name = "always-on", + .always_on = 1, + .domains = POWER_DOMAIN_MASK, + }, +}; + static struct i915_power_well hsw_power_wells[] = { { .name = "always-on", @@ -5713,9 +5712,6 @@ int intel_power_domains_init(struct drm_device *dev) struct drm_i915_private *dev_priv = dev->dev_private; struct i915_power_domains *power_domains = &dev_priv->power_domains; - if (!HAS_POWER_WELL(dev)) - return 0; - mutex_init(&power_domains->lock); /* @@ -5728,7 +5724,8 @@ int intel_power_domains_init(struct drm_device *dev) hsw_pwr = power_domains; } else { - WARN_ON(1); + power_domains->power_wells = intel_power_wells; + power_domains->power_well_count = ARRAY_SIZE(intel_power_wells); } return 0; @@ -5746,9 +5743,6 @@ static void intel_power_domains_resume(struct drm_device *dev) struct i915_power_well *power_well; int i; - if (!HAS_POWER_WELL(dev)) - return; - mutex_lock(&power_domains->lock); for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) { if (power_well->set) @@ -5767,9 +5761,6 @@ void intel_power_domains_init_hw(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; - if (!HAS_POWER_WELL(dev)) - return; - /* For now, we need the power well to be always enabled. */ intel_display_set_init_power(dev, true); intel_power_domains_resume(dev);