drm/i915: Drop the msleep parameter to wait_for()

Jesse's feedback from using the wait_for() macro was that the msleep
argument was that it was superfluous and made the macro more difficult
to use and to read. As the actually amount of time to sleep is not
critical, the crucial part is to sleep and let the processor schedule
something else whilst we wait for the event, replace the argument with a
hardcoded value.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>

drivers/gpu/drm/i915/intel_crt.c

@@ -187,7 +187,7 @@ static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector)
 	I915_WRITE(PCH_ADPA, adpa);
 
 	if (wait_for((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0,
-		     1000, 1))
+		     1000))
 		DRM_ERROR("timed out waiting for FORCE_TRIGGER");
 
 	if (turn_off_dac) {
@@ -244,7 +244,7 @@ static bool intel_crt_detect_hotplug(struct drm_connector *connector)
 		/* wait for FORCE_DETECT to go off */
 		if (wait_for((I915_READ(PORT_HOTPLUG_EN) &
 			      CRT_HOTPLUG_FORCE_DETECT) == 0,
-			     1000, 1))
+			     1000))
 			DRM_ERROR("timed out waiting for FORCE_DETECT to go off");
 	}
 

drivers/gpu/drm/i915/intel_display.c

@@ -1007,9 +1007,9 @@ void intel_wait_for_vblank(struct drm_device *dev, int pipe)
 		   I915_READ(pipestat_reg) | PIPE_VBLANK_INTERRUPT_STATUS);
 
 	/* Wait for vblank interrupt bit to set */
-	if (wait_for((I915_READ(pipestat_reg) &
-		      PIPE_VBLANK_INTERRUPT_STATUS),
-		     50, 0))
+	if (wait_for(I915_READ(pipestat_reg) &
+		     PIPE_VBLANK_INTERRUPT_STATUS,
+		     50))
 		DRM_DEBUG_KMS("vblank wait timed out\n");
 }
 
@@ -1108,7 +1108,7 @@ void i8xx_disable_fbc(struct drm_device *dev)
 	I915_WRITE(FBC_CONTROL, fbc_ctl);
 
 	/* Wait for compressing bit to clear */
-	if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10, 0)) {
+	if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) {
 		DRM_DEBUG_KMS("FBC idle timed out\n");
 		return;
 	}
@@ -2070,7 +2070,7 @@ static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode)
 			I915_WRITE(transconf_reg, temp | TRANS_ENABLE);
 			I915_READ(transconf_reg);
 
-			if (wait_for(I915_READ(transconf_reg) & TRANS_STATE_ENABLE, 100, 1))
+			if (wait_for(I915_READ(transconf_reg) & TRANS_STATE_ENABLE, 100))
 				DRM_ERROR("failed to enable transcoder\n");
 		}
 
@@ -2102,7 +2102,7 @@ static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode)
 			I915_WRITE(pipeconf_reg, temp & ~PIPEACONF_ENABLE);
 
 			/* wait for cpu pipe off, pipe state */
-			if (wait_for((I915_READ(pipeconf_reg) & I965_PIPECONF_ACTIVE) == 0, 50, 1))
+			if (wait_for((I915_READ(pipeconf_reg) & I965_PIPECONF_ACTIVE) == 0, 50))
 				DRM_ERROR("failed to turn off cpu pipe\n");
 		} else
 			DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
@@ -2160,7 +2160,7 @@ static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode)
 			I915_WRITE(transconf_reg, temp & ~TRANS_ENABLE);
 
 			/* wait for PCH transcoder off, transcoder state */
-			if (wait_for((I915_READ(transconf_reg) & TRANS_STATE_ENABLE) == 0, 50, 1))
+			if (wait_for((I915_READ(transconf_reg) & TRANS_STATE_ENABLE) == 0, 50))
 				DRM_ERROR("failed to disable transcoder\n");
 		}
 
@@ -5521,7 +5521,7 @@ void ironlake_enable_drps(struct drm_device *dev)
 	rgvmodectl |= MEMMODE_SWMODE_EN;
 	I915_WRITE(MEMMODECTL, rgvmodectl);
 
-	if (wait_for((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 1, 0))
+	if (wait_for((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
 		DRM_ERROR("stuck trying to change perf mode\n");
 	msleep(1);
 

drivers/gpu/drm/i915/intel_dp.c

@@ -772,7 +772,7 @@ static void ironlake_edp_panel_on (struct drm_device *dev)
 	pp |= PANEL_UNLOCK_REGS | POWER_TARGET_ON;
 	I915_WRITE(PCH_PP_CONTROL, pp);
 
-	if (wait_for(I915_READ(PCH_PP_STATUS) & PP_ON, 5000, 10))
+	if (wait_for(I915_READ(PCH_PP_STATUS) & PP_ON, 5000))
 		DRM_ERROR("panel on wait timed out: 0x%08x\n",
 			  I915_READ(PCH_PP_STATUS));
 
@@ -797,7 +797,7 @@ static void ironlake_edp_panel_off (struct drm_device *dev)
 	pp &= ~POWER_TARGET_ON;
 	I915_WRITE(PCH_PP_CONTROL, pp);
 
-	if (wait_for((I915_READ(PCH_PP_STATUS) & PP_ON) == 0, 5000, 10))
+	if (wait_for((I915_READ(PCH_PP_STATUS) & PP_ON) == 0, 5000))
 		DRM_ERROR("panel off wait timed out: 0x%08x\n",
 			  I915_READ(PCH_PP_STATUS));
 

drivers/gpu/drm/i915/intel_drv.h

@@ -33,7 +33,7 @@
 
 #include "drm_crtc_helper.h"
 
-#define wait_for(COND, MS, W) ({ \
+#define _wait_for(COND, MS, W) ({ \
 	unsigned long timeout__ = jiffies + msecs_to_jiffies(MS);	\
 	int ret__ = 0;							\
 	while (! (COND)) {						\
@@ -46,6 +46,9 @@
 	ret__;								\
 })
 
+#define wait_for(COND, MS) _wait_for(COND, MS, 1)
+#define wait_for_atomic(COND, MS) _wait_for(COND, MS, 0)
+
 /*
  * Display related stuff
  */

drivers/gpu/drm/i915/intel_lvds.c

@@ -114,7 +114,7 @@ static void intel_lvds_set_power(struct drm_device *dev, bool on)
 
 		I915_WRITE(ctl_reg, I915_READ(ctl_reg) |
 			   POWER_TARGET_ON);
-		if (wait_for(I915_READ(status_reg) & PP_ON, 1000, 0))
+		if (wait_for(I915_READ(status_reg) & PP_ON, 1000))
 			DRM_ERROR("timed out waiting to enable LVDS pipe");
 
 		intel_lvds_set_backlight(dev, dev_priv->backlight_duty_cycle);
@@ -123,7 +123,7 @@ static void intel_lvds_set_power(struct drm_device *dev, bool on)
 
 		I915_WRITE(ctl_reg, I915_READ(ctl_reg) &
 			   ~POWER_TARGET_ON);
-		if (wait_for((I915_READ(status_reg) & PP_ON) == 0, 1000, 0))
+		if (wait_for((I915_READ(status_reg) & PP_ON) == 0, 1000))
 			DRM_ERROR("timed out waiting for LVDS pipe to turn off");
 
 		I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);