drm/radeon: Push get_scanout_position() timestamping into kms driver.

Move the ktime_get() clock readouts and potential preempt_disable()
calls from drm core into kms driver to make it compatible with the
api changes in the drm core.

This should not introduce any change in functionality or behaviour
in radeon-kms, just a reshuffling of code.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 0e52cc532c267375f60b79062bc63290a275a516..7b253815a3237153b668d660e9ef7d56642597ec 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -307,7 +307,7 @@ void radeon_crtc_handle_flip(struct radeon_device *rdev, int crtc_id)
         */
        if (update_pending &&
            (DRM_SCANOUTPOS_VALID & radeon_get_crtc_scanoutpos(rdev->ddev, crtc_id,
-                                                              &vpos, &hpos)) &&
+                                                              &vpos, &hpos, NULL, NULL)) &&
            ((vpos >= (99 * rdev->mode_info.crtcs[crtc_id]->base.hwmode.crtc_vdisplay)/100) ||
             (vpos < 0 && !ASIC_IS_AVIVO(rdev)))) {
                /* crtc didn't flip in this target vblank interval,
@@ -1596,12 +1596,17 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
 }
 
 /*
- * Retrieve current video scanout position of crtc on a given gpu.
+ * Retrieve current video scanout position of crtc on a given gpu, and
+ * an optional accurate timestamp of when query happened.
  *
  * \param dev Device to query.
  * \param crtc Crtc to query.
  * \param *vpos Location where vertical scanout position should be stored.
  * \param *hpos Location where horizontal scanout position should go.
+ * \param *stime Target location for timestamp taken immediately before
+ *               scanout position query. Can be NULL to skip timestamp.
+ * \param *etime Target location for timestamp taken immediately after
+ *               scanout position query. Can be NULL to skip timestamp.
  *
  * Returns vpos as a positive number while in active scanout area.
  * Returns vpos as a negative number inside vblank, counting the number
@@ -1617,7 +1622,8 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
  * unknown small number of scanlines wrt. real scanout position.
  *
  */
-int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, int *vpos, int *hpos)
+int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, int *vpos, int *hpos,
+                              ktime_t *stime, ktime_t *etime)
 {
        u32 stat_crtc = 0, vbl = 0, position = 0;
        int vbl_start, vbl_end, vtotal, ret = 0;
@@ -1625,6 +1631,12 @@ int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, int *vpos, int
 
        struct radeon_device *rdev = dev->dev_private;
 
+       /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
+
+       /* Get optional system timestamp before query. */
+       if (stime)
+               *stime = ktime_get();
+
        if (ASIC_IS_DCE4(rdev)) {
                if (crtc == 0) {
                        vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
@@ -1707,6 +1719,12 @@ int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, int *vpos, int
                }
        }
 
+       /* Get optional system timestamp after query. */
+       if (etime)
+               *etime = ktime_get();
+
+       /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
+
        /* Decode into vertical and horizontal scanout position. */
        *vpos = position & 0x1fff;
        *hpos = (position >> 16) & 0x1fff;

diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index dfd4149a43b61fc00419a50b61fb859448c9ea7e..aab24173d2e9c573a76c6ad38966de0d73ce55aa 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -107,7 +107,8 @@ int radeon_gem_object_open(struct drm_gem_object *obj,
 void radeon_gem_object_close(struct drm_gem_object *obj,
                                struct drm_file *file_priv);
 extern int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc,
-                                     int *vpos, int *hpos);
+                                     int *vpos, int *hpos, ktime_t *stime,
+                                     ktime_t *etime);
 extern const struct drm_ioctl_desc radeon_ioctls_kms[];
 extern int radeon_max_kms_ioctl;
 int radeon_mmap(struct file *filp, struct vm_area_struct *vma);

diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 8b4e712c1e5c0f5ef90e1e6186cd8fd619ebf15e..3f0dd664af90d6815b2edea895662936cc1982e4 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -766,7 +766,8 @@ extern int radeon_crtc_cursor_move(struct drm_crtc *crtc,
                                   int x, int y);
 
 extern int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc,
-                                     int *vpos, int *hpos);
+                                     int *vpos, int *hpos, ktime_t *stime,
+                                     ktime_t *etime);
 
 extern bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev);
 extern struct edid *

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 2baa0fa75e36ec215d129fe9e15252837e908645..981fd06e1f9a018b0c7ebbbb7d6b8d343e003c8b 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -1487,7 +1487,7 @@ static bool radeon_pm_in_vbl(struct radeon_device *rdev)
         */
        for (crtc = 0; (crtc < rdev->num_crtc) && in_vbl; crtc++) {
                if (rdev->pm.active_crtcs & (1 << crtc)) {
-                       vbl_status = radeon_get_crtc_scanoutpos(rdev->ddev, crtc, &vpos, &hpos);
+                       vbl_status = radeon_get_crtc_scanoutpos(rdev->ddev, crtc, &vpos, &hpos, NULL, NULL);
                        if ((vbl_status & DRM_SCANOUTPOS_VALID) &&
                            !(vbl_status & DRM_SCANOUTPOS_INVBL))
                                in_vbl = false;