From patchwork Fri Aug 6 15:11:54 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 117848 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o76FCrTG013053 for ; Fri, 6 Aug 2010 15:13:29 GMT Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C8BE59F4DA for ; Fri, 6 Aug 2010 08:12:53 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (server109-228-4-14.live-servers.net [109.228.4.14]) by gabe.freedesktop.org (Postfix) with ESMTP id 05C8E9F0DD for ; Fri, 6 Aug 2010 08:12:41 -0700 (PDT) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.66.37; Received: from arrandale.alporthouse.com (unverified [78.156.66.37]) by fireflyinternet.com (Firefly Internet SMTP) with ESMTP id 2142493-1500048 for multiple; Fri, 06 Aug 2010 16:15:22 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Fri, 6 Aug 2010 16:11:54 +0100 Message-Id: <1281107514-3876-1-git-send-email-chris@chris-wilson.co.uk> X-Mailer: git-send-email 1.7.1 X-Originating-IP: 78.156.66.37 Subject: [Intel-gfx] [PATCH] drm/i915: Ensure that while(INREG()) are bounded. X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.11 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-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Fri, 06 Aug 2010 15:13:29 +0000 (UTC) diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index d4d0c1c..45e043c 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -187,8 +187,9 @@ static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector) DRM_DEBUG_KMS("pch crt adpa 0x%x", adpa); I915_WRITE(PCH_ADPA, adpa); - while ((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) != 0) - ; + if (wait_for((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0, + 1000, 1)) + DRM_DEBUG_DRIVER("timed out waiting for FORCE_TRIGGER"); if (HAS_PCH_CPT(dev)) { I915_WRITE(PCH_ADPA, temp); @@ -239,17 +240,13 @@ static bool intel_crt_detect_hotplug(struct drm_connector *connector) hotplug_en |= CRT_HOTPLUG_FORCE_DETECT; for (i = 0; i < tries ; i++) { - unsigned long timeout; /* turn on the FORCE_DETECT */ I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); - timeout = jiffies + msecs_to_jiffies(1000); /* wait for FORCE_DETECT to go off */ - do { - if (!(I915_READ(PORT_HOTPLUG_EN) & - CRT_HOTPLUG_FORCE_DETECT)) - break; - msleep(1); - } while (time_after(timeout, jiffies)); + if (wait_for((I915_READ(PORT_HOTPLUG_EN) & + CRT_HOTPLUG_FORCE_DETECT) == 0, + 1000, 1)) + DRM_DEBUG_DRIVER("timed out waiting for FORCE_DETECT to go off"); } stat = I915_READ(PORT_HOTPLUG_STAT); diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 5cae58a..958d9aa 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1034,7 +1034,6 @@ static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval) void i8xx_disable_fbc(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; - unsigned long timeout = jiffies + msecs_to_jiffies(1); u32 fbc_ctl; if (!I915_HAS_FBC(dev)) @@ -1049,12 +1048,9 @@ void i8xx_disable_fbc(struct drm_device *dev) I915_WRITE(FBC_CONTROL, fbc_ctl); /* Wait for compressing bit to clear */ - while (I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) { - if (time_after(jiffies, timeout)) { - DRM_DEBUG_DRIVER("FBC idle timed out\n"); - break; - } - ; /* do nothing */ + if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10, 0)) { + DRM_DEBUG_KMS("FBC idle timed out\n"); + return; } intel_wait_for_vblank(dev); @@ -1845,7 +1841,6 @@ static int ironlake_crtc_dpms(struct drm_crtc *crtc, int mode) int trans_vsync_reg = (pipe == 0) ? TRANS_VSYNC_A : TRANS_VSYNC_B; int trans_dpll_sel = (pipe == 0) ? 0 : 1; u32 temp; - int n; u32 pipe_bpc; temp = I915_READ(pipeconf_reg); @@ -2040,9 +2035,8 @@ static int ironlake_crtc_dpms(struct drm_crtc *crtc, int mode) temp |= pipe_bpc; I915_WRITE(transconf_reg, temp | TRANS_ENABLE); - while ((I915_READ(transconf_reg) & TRANS_STATE_ENABLE) == 0) - ; - + if (wait_for(I915_READ(transconf_reg) & TRANS_STATE_ENABLE, 10, 0)) + DRM_DEBUG_KMS("failed to enable transcoder\n"); } intel_crtc_load_lut(crtc); @@ -2074,19 +2068,9 @@ static int ironlake_crtc_dpms(struct drm_crtc *crtc, int mode) if (temp & PIPEACONF_ENABLE) { I915_WRITE(pipeconf_reg, temp & ~PIPEACONF_ENABLE); - n = 0; /* wait for cpu pipe off, pipe state */ - while (I915_READ(pipeconf_reg) & I965_PIPECONF_ACTIVE) { - n++; - if (n < 60) { - udelay(500); - continue; - } else { - DRM_DEBUG_KMS("pipe %d off delay\n", - pipe); - break; - } - } + if (wait_for((I915_READ(pipeconf_reg) & I965_PIPECONF_ACTIVE) == 0, 50, 1)) + DRM_DEBUG_KMS("failed to turn off cpu pipe\n"); } else DRM_DEBUG_KMS("crtc %d is disabled\n", pipe); @@ -2137,19 +2121,9 @@ static int ironlake_crtc_dpms(struct drm_crtc *crtc, int mode) if (temp & TRANS_ENABLE) { I915_WRITE(transconf_reg, temp & ~TRANS_ENABLE); - n = 0; /* wait for PCH transcoder off, transcoder state */ - while (I915_READ(transconf_reg) & TRANS_STATE_ENABLE) { - n++; - if (n < 60) { - udelay(500); - continue; - } else { - DRM_DEBUG_KMS("transcoder %d off " - "delay\n", pipe); - break; - } - } + if (wait_for((I915_READ(transconf_reg) & TRANS_STATE_ENABLE) == 0, 50, 1)) + DRM_DEBUG_KMS("failed to disable transcoder\n"); } if (HAS_PCH_CPT(dev)) { @@ -5383,7 +5357,6 @@ void ironlake_enable_drps(struct drm_device *dev) struct drm_i915_private *dev_priv = dev->dev_private; u32 rgvmodectl = I915_READ(MEMMODECTL); u8 fmax, fmin, fstart, vstart; - int i = 0; /* 100ms RC evaluation intervals */ I915_WRITE(RCUPEI, 100000); @@ -5427,13 +5400,8 @@ void ironlake_enable_drps(struct drm_device *dev) rgvmodectl |= MEMMODE_SWMODE_EN; I915_WRITE(MEMMODECTL, rgvmodectl); - while (I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) { - if (i++ > 100) { - DRM_ERROR("stuck trying to change perf mode\n"); - break; - } - msleep(1); - } + if (wait_for((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 1, 0)) + DRM_DEBUG_DRIVER("stuck trying to change perf mode\n"); msleep(1); ironlake_set_drps(dev, fstart); diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 3e98b10..581e0b0 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -761,22 +761,18 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, static void ironlake_edp_panel_on (struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; - unsigned long timeout = jiffies + msecs_to_jiffies(5000); - u32 pp, pp_status; + u32 pp; - pp_status = I915_READ(PCH_PP_STATUS); - if (pp_status & PP_ON) + if (I915_READ(PCH_PP_STATUS) & PP_ON) return; pp = I915_READ(PCH_PP_CONTROL); pp |= PANEL_UNLOCK_REGS | POWER_TARGET_ON; I915_WRITE(PCH_PP_CONTROL, pp); - do { - pp_status = I915_READ(PCH_PP_STATUS); - } while (((pp_status & PP_ON) == 0) && !time_after(jiffies, timeout)); - if (time_after(jiffies, timeout)) - DRM_DEBUG_KMS("panel on wait timed out: 0x%08x\n", pp_status); + if (wait_for(I915_READ(PCH_PP_STATUS) & PP_ON, 5000, 10)) + DRM_DEBUG_DRIVER("panel on wait timed out: 0x%08x\n", + I915_READ(PCH_PP_STATUS)); pp &= ~(PANEL_UNLOCK_REGS | EDP_FORCE_VDD); I915_WRITE(PCH_PP_CONTROL, pp); @@ -785,18 +781,15 @@ static void ironlake_edp_panel_on (struct drm_device *dev) static void ironlake_edp_panel_off (struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; - unsigned long timeout = jiffies + msecs_to_jiffies(5000); - u32 pp, pp_status; + u32 pp; pp = I915_READ(PCH_PP_CONTROL); pp &= ~POWER_TARGET_ON; I915_WRITE(PCH_PP_CONTROL, pp); - do { - pp_status = I915_READ(PCH_PP_STATUS); - } while ((pp_status & PP_ON) && !time_after(jiffies, timeout)); - if (time_after(jiffies, timeout)) - DRM_DEBUG_KMS("panel off wait timed out\n"); + if (wait_for((I915_READ(PCH_PP_STATUS) & PP_ON) == 0, 5000, 10)) + DRM_DEBUG_DRIVER("panel on wait timed out: 0x%08x\n", + I915_READ(PCH_PP_STATUS)); /* Make sure VDD is enabled so DP AUX will work */ pp |= EDP_FORCE_VDD; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 34fc531..80d7184 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -32,6 +32,20 @@ #include "drm_crtc.h" #include "drm_crtc_helper.h" + +#define wait_for(COND, MS, W) ({ \ + unsigned long timeout__ = jiffies + msecs_to_jiffies(MS); \ + int ret__ = 0; \ + while (! (COND)) { \ + if (time_after(jiffies, timeout__)) { \ + ret__ = -ETIMEDOUT; \ + break; \ + } \ + if (W) msleep(W); \ + } \ + ret__; \ +}) + /* * Display related stuff */ diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index c15490d..01b063c 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -96,7 +96,7 @@ static u32 intel_lvds_get_max_backlight(struct drm_device *dev) static void intel_lvds_set_power(struct drm_device *dev, bool on) { struct drm_i915_private *dev_priv = dev->dev_private; - u32 pp_status, ctl_reg, status_reg, lvds_reg; + u32 ctl_reg, status_reg, lvds_reg; if (HAS_PCH_SPLIT(dev)) { ctl_reg = PCH_PP_CONTROL; @@ -114,9 +114,8 @@ static void intel_lvds_set_power(struct drm_device *dev, bool on) I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON); - do { - pp_status = I915_READ(status_reg); - } while ((pp_status & PP_ON) == 0); + if (wait_for(I915_READ(status_reg) & PP_ON, 1000, 0)) + DRM_DEBUG_DRIVER("timed out waiting to enable LVDS pipe"); intel_lvds_set_backlight(dev, dev_priv->backlight_duty_cycle); } else { @@ -124,9 +123,8 @@ static void intel_lvds_set_power(struct drm_device *dev, bool on) I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON); - do { - pp_status = I915_READ(status_reg); - } while (pp_status & PP_ON); + if (wait_for((I915_READ(status_reg) & PP_ON) == 0, 1000, 0)) + DRM_DEBUG_DRIVER("timed out waiting for LVDS pipe to turn off"); I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN); POSTING_READ(lvds_reg);