drm: Move timestamping constants into drm_vblank_crtc

Collect the timestamping constants alongside the rest of the relevant
stuff under drm_vblank_crtc.

We can now get rid of the 'refcrtc' parameter to
drm_calc_vbltimestamp_from_scanoutpos().
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c

@@ -681,7 +681,7 @@ int amdgpu_get_vblank_timestamp_kms(struct drm_device *dev, int crtc,
 	/* Helper routine in DRM core does all the work: */
 	return drm_calc_vbltimestamp_from_scanoutpos(dev, crtc, max_error,
 						     vblank_time, flags,
-						     drmcrtc, &drmcrtc->hwmode);
+						     &drmcrtc->hwmode);
 }
 
 const struct drm_ioctl_desc amdgpu_ioctls_kms[] = {

drivers/gpu/drm/drm_irq.c

@@ -603,6 +603,7 @@ int drm_control(struct drm_device *dev, void *data,
 void drm_calc_timestamping_constants(struct drm_crtc *crtc,
 				     const struct drm_display_mode *mode)
 {
+	struct drm_vblank_crtc *vblank = &crtc->dev->vblank[drm_crtc_index(crtc)];
 	int linedur_ns = 0, pixeldur_ns = 0, framedur_ns = 0;
 	int dotclock = mode->crtc_clock;
 
@@ -628,9 +629,9 @@ void drm_calc_timestamping_constants(struct drm_crtc *crtc,
 		DRM_ERROR("crtc %u: Can't calculate constants, dotclock = 0!\n",
 			  crtc->base.id);
 
-	crtc->pixeldur_ns = pixeldur_ns;
-	crtc->linedur_ns  = linedur_ns;
-	crtc->framedur_ns = framedur_ns;
+	vblank->pixeldur_ns = pixeldur_ns;
+	vblank->linedur_ns  = linedur_ns;
+	vblank->framedur_ns = framedur_ns;
 
 	DRM_DEBUG("crtc %u: hwmode: htotal %d, vtotal %d, vdisplay %d\n",
 		  crtc->base.id, mode->crtc_htotal,
@@ -651,7 +652,6 @@ EXPORT_SYMBOL(drm_calc_timestamping_constants);
  * @flags: Flags to pass to driver:
  *         0 = Default,
  *         DRM_CALLED_FROM_VBLIRQ = If function is called from vbl IRQ handler
- * @refcrtc: CRTC which defines scanout timing
  * @mode: mode which defines the scanout timings
  *
  * Implements calculation of exact vblank timestamps from given drm_display_mode
@@ -692,9 +692,9 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
 					  int *max_error,
 					  struct timeval *vblank_time,
 					  unsigned flags,
-					  const struct drm_crtc *refcrtc,
 					  const struct drm_display_mode *mode)
 {
+	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
 	struct timeval tv_etime;
 	ktime_t stime, etime;
 	int vbl_status;
@@ -714,9 +714,9 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
 	}
 
 	/* Durations of frames, lines, pixels in nanoseconds. */
-	framedur_ns = refcrtc->framedur_ns;
-	linedur_ns  = refcrtc->linedur_ns;
-	pixeldur_ns = refcrtc->pixeldur_ns;
+	framedur_ns = vblank->framedur_ns;
+	linedur_ns  = vblank->linedur_ns;
+	pixeldur_ns = vblank->pixeldur_ns;
 
 	/* If mode timing undefined, just return as no-op:
 	 * Happens during initial modesetting of a crtc.

drivers/gpu/drm/i915/i915_irq.c

@@ -810,7 +810,6 @@ static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
 	/* Helper routine in DRM core does all the work: */
 	return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
 						     vblank_time, flags,
-						     crtc,
 						     &crtc->hwmode);
 }
 

drivers/gpu/drm/nouveau/nouveau_display.c

@@ -103,6 +103,7 @@ nouveau_display_scanoutpos_head(struct drm_crtc *crtc, int *vpos, int *hpos,
 		.base.head = nouveau_crtc(crtc)->index,
 	};
 	struct nouveau_display *disp = nouveau_display(crtc->dev);
+	struct drm_vblank_crtc *vblank = &crtc->dev->vblank[drm_crtc_index(crtc)];
 	int ret, retry = 1;
 
 	do {
@@ -116,7 +117,7 @@ nouveau_display_scanoutpos_head(struct drm_crtc *crtc, int *vpos, int *hpos,
 			break;
 		}
 
-		if (retry) ndelay(crtc->linedur_ns);
+		if (retry) ndelay(vblank->linedur_ns);
 	} while (retry--);
 
 	*hpos = args.scan.hline;
@@ -155,7 +156,7 @@ nouveau_display_vblstamp(struct drm_device *dev, int head, int *max_error,
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		if (nouveau_crtc(crtc)->index == head) {
 			return drm_calc_vbltimestamp_from_scanoutpos(dev,
-					head, max_error, time, flags, crtc,
+					head, max_error, time, flags,
 					&crtc->hwmode);
 		}
 	}

drivers/gpu/drm/radeon/radeon_kms.c

@@ -841,7 +841,7 @@ int radeon_get_vblank_timestamp_kms(struct drm_device *dev, int crtc,
 	/* Helper routine in DRM core does all the work: */
 	return drm_calc_vbltimestamp_from_scanoutpos(dev, crtc, max_error,
 						     vblank_time, flags,
-						     drmcrtc, &drmcrtc->hwmode);
+						     &drmcrtc->hwmode);
 }
 
 #define KMS_INVALID_IOCTL(name)						\

include/drm/drmP.h

@@ -701,6 +701,9 @@ struct drm_vblank_crtc {
 	u32 last_wait;			/* Last vblank seqno waited per CRTC */
 	unsigned int inmodeset;		/* Display driver is setting mode */
 	unsigned int pipe;		/* crtc index */
+	int framedur_ns;		/* frame/field duration in ns */
+	int linedur_ns;			/* line duration in ns */
+	int pixeldur_ns;		/* pixel duration in ns */
 	bool enabled;			/* so we don't call enable more than
 					   once per disable */
 };
@@ -951,7 +954,6 @@ extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
 						 unsigned int pipe, int *max_error,
 						 struct timeval *vblank_time,
 						 unsigned flags,
-						 const struct drm_crtc *refcrtc,
 						 const struct drm_display_mode *mode);
 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
 					    const struct drm_display_mode *mode);

include/drm/drm_crtc.h

@@ -413,9 +413,6 @@ struct drm_crtc_funcs {
  * @funcs: CRTC control functions
  * @gamma_size: size of gamma ramp
  * @gamma_store: gamma ramp values
- * @framedur_ns: precise frame timing
- * @linedur_ns: precise line timing
- * @pixeldur_ns: precise pixel timing
  * @helper_private: mid-layer private data
  * @properties: property tracking for this CRTC
  * @state: current atomic state for this CRTC
@@ -468,9 +465,6 @@ struct drm_crtc {
 	uint32_t gamma_size;
 	uint16_t *gamma_store;
 
-	/* Constants needed for precise vblank and swap timestamping. */
-	int framedur_ns, linedur_ns, pixeldur_ns;
-
 	/* if you are using the helper */
 	const void *helper_private;