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| author | Thierry Reding <treding@nvidia.com> | 2015-01-28 16:43:05 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2015-04-02 19:46:21 +0300 |
| commit | 42e9ce0523699b3f3383b7c5c0bcc2657a77d0ca (patch) | |
| tree | 6b12a0c8d1152a7ee3e7b670e9236b311a08a8f6 /drivers/gpu/drm/tegra/drm.c | |
| parent | b4a20144e0c0a45431695fa5968ce2ed8c9ce6ca (diff) | |
| download | linux-42e9ce0523699b3f3383b7c5c0bcc2657a77d0ca.tar.xz | |
drm/tegra: dc: Implement hardware VBLANK counter
The display controller on Tegra can use syncpoints to count VBLANK
events. syncpoints are 32-bit unsigned integers, so well suited as
VBLANK counters.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/drm/tegra/drm.c')
| -rw-r--r-- | drivers/gpu/drm/tegra/drm.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index 7ba7e2860ac8..8de17f9e5fe1 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -172,6 +172,10 @@ static int tegra_drm_load(struct drm_device *drm, unsigned long flags) */ drm->irq_enabled = true; + /* syncpoints are used for full 32-bit hardware VBLANK counters */ + drm->vblank_disable_immediate = true; + drm->max_vblank_count = 0xffffffff; + err = drm_vblank_init(drm, drm->mode_config.num_crtc); if (err < 0) goto device; @@ -813,12 +817,12 @@ static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm, static u32 tegra_drm_get_vblank_counter(struct drm_device *drm, int pipe) { struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe); + struct tegra_dc *dc = to_tegra_dc(crtc); if (!crtc) return 0; - /* TODO: implement real hardware counter using syncpoints */ - return drm_crtc_vblank_count(crtc); + return tegra_dc_get_vblank_counter(dc); } static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe) |