From patchwork Fri Oct 18 19:32:07 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Widawsky X-Patchwork-Id: 3069951 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id A0053BF924 for ; Fri, 18 Oct 2013 20:13:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3880A20459 for ; Fri, 18 Oct 2013 20:13:34 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id B369020333 for ; Fri, 18 Oct 2013 20:13:32 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 76A73E61DC for ; Fri, 18 Oct 2013 13:13:32 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mail.bwidawsk.net (bwidawsk.net [166.78.191.112]) by gabe.freedesktop.org (Postfix) with ESMTP id 29A17E74B6 for ; Fri, 18 Oct 2013 12:32:18 -0700 (PDT) Received: by mail.bwidawsk.net (Postfix, from userid 5001) id AFB874A6CC; Fri, 18 Oct 2013 12:32:17 -0700 (PDT) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from willis.kumite (c-24-21-100-90.hsd1.or.comcast.net [24.21.100.90]) by mail.bwidawsk.net (Postfix) with ESMTPSA id B65524A6B3; Fri, 18 Oct 2013 12:32:15 -0700 (PDT) From: Ben Widawsky To: Intel GFX Date: Fri, 18 Oct 2013 12:32:07 -0700 Message-Id: <1382124727-12255-1-git-send-email-benjamin.widawsky@intel.com> X-Mailer: git-send-email 1.8.4 Cc: Ben Widawsky , Ben Widawsky Subject: [Intel-gfx] [PATCH] drm/i915: Print RC6 info less often 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+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org X-Virus-Scanned: ClamAV using ClamSMTP Since we use intel_enable_rc6() now for more than just when we're enabling RC6, we'll see this message many times, and it is just confusing. As an example, calc_residency calls this function whenever poked via sysfs. This leaves the impression in dmesg that we're constantly re-enabling RC6. While at it, move the defines and description from drv.h to intel_pm.c, since these are only ever used in that code. Signed-off-by: Ben Widawsky Reviewed-by: Chris Wilson --- drivers/gpu/drm/i915/i915_drv.h | 21 ---------------- drivers/gpu/drm/i915/intel_pm.c | 54 ++++++++++++++++++++++++++++++++--------- 2 files changed, 43 insertions(+), 32 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 701098c..76e5435 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1786,27 +1786,6 @@ struct drm_i915_file_private { #include "i915_trace.h" -/** - * RC6 is a special power stage which allows the GPU to enter an very - * low-voltage mode when idle, using down to 0V while at this stage. This - * stage is entered automatically when the GPU is idle when RC6 support is - * enabled, and as soon as new workload arises GPU wakes up automatically as well. - * - * There are different RC6 modes available in Intel GPU, which differentiate - * among each other with the latency required to enter and leave RC6 and - * voltage consumed by the GPU in different states. - * - * The combination of the following flags define which states GPU is allowed - * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and - * RC6pp is deepest RC6. Their support by hardware varies according to the - * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one - * which brings the most power savings; deeper states save more power, but - * require higher latency to switch to and wake up. - */ -#define INTEL_RC6_ENABLE (1<<0) -#define INTEL_RC6p_ENABLE (1<<1) -#define INTEL_RC6pp_ENABLE (1<<2) - extern const struct drm_ioctl_desc i915_ioctls[]; extern int i915_max_ioctl; extern unsigned int i915_fbpercrtc __always_unused; diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index bf5261f..ca9a778 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -32,6 +32,27 @@ #include #include +/** + * RC6 is a special power stage which allows the GPU to enter an very + * low-voltage mode when idle, using down to 0V while at this stage. This + * stage is entered automatically when the GPU is idle when RC6 support is + * enabled, and as soon as new workload arises GPU wakes up automatically as well. + * + * There are different RC6 modes available in Intel GPU, which differentiate + * among each other with the latency required to enter and leave RC6 and + * voltage consumed by the GPU in different states. + * + * The combination of the following flags define which states GPU is allowed + * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and + * RC6pp is deepest RC6. Their support by hardware varies according to the + * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one + * which brings the most power savings; deeper states save more power, but + * require higher latency to switch to and wake up. + */ +#define INTEL_RC6_ENABLE (1<<0) +#define INTEL_RC6p_ENABLE (1<<1) +#define INTEL_RC6pp_ENABLE (1<<2) + /* FBC, or Frame Buffer Compression, is a technique employed to compress the * framebuffer contents in-memory, aiming at reducing the required bandwidth * during in-memory transfers and, therefore, reduce the power packet. @@ -3685,6 +3706,20 @@ static void valleyview_disable_rps(struct drm_device *dev) } } +static void intel_print_rc6_info(struct drm_device *dev, u32 mode) +{ + if (IS_GEN6(dev)) + DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n"); + + if (IS_HASWELL(dev)) + DRM_DEBUG_DRIVER("Haswell: only RC6 available\n"); + + DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n", + (mode & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off", + (mode & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off", + (mode & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off"); +} + int intel_enable_rc6(const struct drm_device *dev) { /* No RC6 before Ironlake */ @@ -3699,18 +3734,13 @@ int intel_enable_rc6(const struct drm_device *dev) if (INTEL_INFO(dev)->gen == 5) return 0; - if (IS_HASWELL(dev)) { - DRM_DEBUG_DRIVER("Haswell: only RC6 available\n"); + if (IS_HASWELL(dev)) return INTEL_RC6_ENABLE; - } /* snb/ivb have more than one rc6 state. */ - if (INTEL_INFO(dev)->gen == 6) { - DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n"); + if (INTEL_INFO(dev)->gen == 6) return INTEL_RC6_ENABLE; - } - DRM_DEBUG_DRIVER("RC6 and deep RC6 enabled\n"); return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE); } @@ -3812,10 +3842,7 @@ static void gen6_enable_rps(struct drm_device *dev) rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE; } - DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n", - (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off", - (rc6_mask & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off", - (rc6_mask & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off"); + intel_print_rc6_info(dev, rc6_mask); I915_WRITE(GEN6_RC_CONTROL, rc6_mask | @@ -4051,6 +4078,9 @@ static void valleyview_enable_rps(struct drm_device *dev) VLV_RENDER_RC6_COUNT_EN)); if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE) rc6_mode = GEN7_RC_CTL_TO_MODE; + + intel_print_rc6_info(dev, rc6_mode); + I915_WRITE(GEN6_RC_CONTROL, rc6_mode); val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS); @@ -4222,6 +4252,8 @@ static void ironlake_enable_rc6(struct drm_device *dev) I915_WRITE(PWRCTXA, i915_gem_obj_ggtt_offset(dev_priv->ips.pwrctx) | PWRCTX_EN); I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT); + + intel_print_rc6_info(dev, INTEL_RC6_ENABLE); } static unsigned long intel_pxfreq(u32 vidfreq)