From patchwork Thu May 4 11:41:30 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maarten Lankhorst X-Patchwork-Id: 9711483 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4FF0A60235 for ; Thu, 4 May 2017 11:41:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3852D28686 for ; Thu, 4 May 2017 11:41:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2B7F92868A; Thu, 4 May 2017 11:41:52 +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=-4.2 required=2.0 tests=BAYES_00, 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 AA3CC28686 for ; Thu, 4 May 2017 11:41:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D65C96E180; Thu, 4 May 2017 11:41:49 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mblankhorst.nl (mblankhorst.nl [IPv6:2a02:2308::216:3eff:fe92:dfa3]) by gabe.freedesktop.org (Postfix) with ESMTPS id B9CA66E089 for ; Thu, 4 May 2017 11:41:48 +0000 (UTC) From: Maarten Lankhorst To: intel-gfx@lists.freedesktop.org Date: Thu, 4 May 2017 13:41:30 +0200 Message-Id: <20170504114133.4843-5-maarten.lankhorst@linux.intel.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170504114133.4843-1-maarten.lankhorst@linux.intel.com> References: <20170504114133.4843-1-maarten.lankhorst@linux.intel.com> Subject: [Intel-gfx] [RFC 4/7] drm/i915: Calculate gen4 watermarks semiatomically. X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 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 Gen4 watermark is handled same as gen3-. Calculate the optimal watermarks atomically first, and program it in the legacy helper. Signed-off-by: Maarten Lankhorst --- drivers/gpu/drm/i915/intel_pm.c | 136 ++++++++++++++++++++++++++++------------ 1 file changed, 95 insertions(+), 41 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index eb1bb8b3f9a6..c5bdef6281f3 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -2189,58 +2189,109 @@ static void vlv_optimize_watermarks(struct intel_atomic_state *state, mutex_unlock(&dev_priv->wm.wm_mutex); } -static void i965_update_wm(struct intel_crtc *unused_crtc) +static int i965_compute_pipe_wm(struct intel_crtc_state *crtc_state) { - struct drm_i915_private *dev_priv = to_i915(unused_crtc->base.dev); - struct intel_crtc *crtc; + struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + struct intel_atomic_state *state = + to_intel_atomic_state(crtc_state->base.state); + struct i9xx_wm_state *wm_state = &crtc_state->wm.i9xx.optimal; + struct intel_plane *plane = to_intel_plane(crtc->base.primary); + const struct drm_plane_state *primary_plane_state = NULL; + const struct drm_plane_state *cursor_plane_state = NULL; + + memset(wm_state, 0, sizeof(*wm_state)); + + if (crtc_state->base.plane_mask & BIT(drm_plane_index(&plane->base))) + primary_plane_state = __drm_atomic_get_current_plane_state(&state->base, &plane->base); + + if (crtc_state->base.plane_mask & BIT(drm_plane_index(crtc->base.cursor))) + cursor_plane_state = __drm_atomic_get_current_plane_state(&state->base, crtc->base.cursor); + + if (primary_plane_state) { + static const int sr_latency_ns = 12000; + const struct drm_display_mode *adjusted_mode = + &crtc_state->base.adjusted_mode; + unsigned active_crtcs; + unsigned long entries; + bool may_cxsr; + + if (state->modeset) + active_crtcs = state->active_crtcs; + else + active_crtcs = dev_priv->active_crtcs; + + may_cxsr = active_crtcs == drm_crtc_mask(&crtc->base); + + if (may_cxsr && intel_wm_plane_visible(crtc_state, to_intel_plane_state(primary_plane_state))) { + struct drm_framebuffer *fb = primary_plane_state->fb; + unsigned cpp = fb->format->cpp[0]; + + entries = intel_wm_method2(adjusted_mode->crtc_clock, + adjusted_mode->crtc_htotal, + crtc_state->pipe_src_w, cpp, + sr_latency_ns / 100); + entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE); + if (entries < I965_FIFO_SIZE) + wm_state->sr.plane = I965_FIFO_SIZE - entries; + else + may_cxsr = false; + + DRM_DEBUG_KMS("self-refresh entries: %ld\n", entries); + } + + /* No need to use intel_wm_plane_visible here, since cursor. */ + if (may_cxsr && cursor_plane_state && crtc_state->base.active) { + entries = intel_wm_method2(adjusted_mode->crtc_clock, + adjusted_mode->crtc_htotal, + cursor_plane_state->crtc_w, 4, + sr_latency_ns / 100); + + entries = DIV_ROUND_UP(entries, + i965_cursor_wm_info.cacheline_size) + + i965_cursor_wm_info.guard_size; + + if (entries < i965_cursor_wm_info.fifo_size) + wm_state->sr.cursor = min(i965_cursor_wm_info.fifo_size - entries, + (unsigned long)(i965_cursor_wm_info.max_wm)); + else + may_cxsr = false; + } else if (may_cxsr) + wm_state->sr.cursor = 16; + + wm_state->cxsr = may_cxsr; + + DRM_DEBUG_KMS("FIFO watermarks - can cxsr: %s, display plane %d, cursor SR size: %d\n", + yesno(wm_state->cxsr), wm_state->sr.plane, wm_state->sr.cursor); + } + + return 0; +} + +static void i965_update_wm(struct intel_crtc *crtc) +{ + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); int srwm = 1; int cursor_sr = 16; - bool cxsr_enabled; + bool cxsr_enabled = false; + + crtc->wm.active.i9xx = crtc->config->wm.i9xx.optimal; /* Calc sr entries for one plane configs */ crtc = single_enabled_crtc(dev_priv); - if (crtc) { - /* self-refresh has much higher latency */ - static const int sr_latency_ns = 12000; - const struct drm_display_mode *adjusted_mode = - &crtc->config->base.adjusted_mode; - const struct drm_framebuffer *fb = - crtc->base.primary->state->fb; - int clock = adjusted_mode->crtc_clock; - int htotal = adjusted_mode->crtc_htotal; - int hdisplay = crtc->config->pipe_src_w; - int cpp = fb->format->cpp[0]; - int entries; - - entries = intel_wm_method2(clock, htotal, - hdisplay, cpp, sr_latency_ns / 100); - entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE); - srwm = I965_FIFO_SIZE - entries; - if (srwm < 0) - srwm = 1; - srwm &= 0x1ff; - DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n", - entries, srwm); - - entries = intel_wm_method2(clock, htotal, - crtc->base.cursor->state->crtc_w, 4, - sr_latency_ns / 100); - entries = DIV_ROUND_UP(entries, - i965_cursor_wm_info.cacheline_size) + - i965_cursor_wm_info.guard_size; - - cursor_sr = i965_cursor_wm_info.fifo_size - entries; - if (cursor_sr > i965_cursor_wm_info.max_wm) - cursor_sr = i965_cursor_wm_info.max_wm; + if (crtc && crtc->wm.active.i9xx.cxsr) { + struct i9xx_wm_state *wm_state = &crtc->wm.active.i9xx; + + srwm = wm_state->sr.plane; + cursor_sr = wm_state->sr.cursor; DRM_DEBUG_KMS("self-refresh watermark: display plane %d " "cursor %d\n", srwm, cursor_sr); cxsr_enabled = true; - } else { - cxsr_enabled = false; + } else if (dev_priv->wm.i9xx.cxsr) { /* Turn off self refresh if both pipes are enabled */ - intel_set_memory_cxsr(dev_priv, false); + _intel_set_memory_cxsr(dev_priv, false); } DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n", @@ -2257,7 +2308,9 @@ static void i965_update_wm(struct intel_crtc *unused_crtc) I915_WRITE(DSPFW3, FW_WM(cursor_sr, CURSOR_SR)); if (cxsr_enabled) - intel_set_memory_cxsr(dev_priv, true); + _intel_set_memory_cxsr(dev_priv, true); + + dev_priv->wm.i9xx.cxsr = cxsr_enabled; } #undef FW_WM @@ -8857,6 +8910,7 @@ void intel_init_pm(struct drm_i915_private *dev_priv) dev_priv->display.optimize_watermarks = i9xx_optimize_watermarks; } } else if (IS_GEN4(dev_priv)) { + dev_priv->display.compute_pipe_wm = i965_compute_pipe_wm; dev_priv->display.update_wm = i965_update_wm; } else if (IS_GEN3(dev_priv)) { dev_priv->display.compute_pipe_wm = i9xx_compute_pipe_wm;