diff options
| author | Thierry Reding <treding@nvidia.com> | 2017-12-14 15:50:19 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2017-12-21 16:52:35 +0300 |
| commit | 363541e8eeed16fdf696252008ddee823730f82c (patch) | |
| tree | 7da7080b5c171a166c3339aa7f608096b24676d3 /drivers/gpu/drm/tegra/dc.c | |
| parent | 1087fac18b8e3ec8fadf1595bbc46dce7ff08a81 (diff) | |
| download | linux-363541e8eeed16fdf696252008ddee823730f82c.tar.xz | |
drm/tegra: dc: Remove redundant spinlock
The spinlock is only used to serialize accesses to the DC_CMD_INT_MASK
register. However, this register is accesses either with interrupts
masked (in tegra_crtc_atomic_enable()) or protected by the vbl_lock and
vblank_time_lock spinlocks of the DRM device. Therefore, these accesses
don't need any extra serialization and the lock can be removed.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/drm/tegra/dc.c')
| -rw-r--r-- | drivers/gpu/drm/tegra/dc.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index edae21197fc6..cd84d8514d48 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -1261,31 +1261,23 @@ static u32 tegra_dc_get_vblank_counter(struct drm_crtc *crtc) static int tegra_dc_enable_vblank(struct drm_crtc *crtc) { struct tegra_dc *dc = to_tegra_dc(crtc); - unsigned long value, flags; - - spin_lock_irqsave(&dc->lock, flags); + u32 value; value = tegra_dc_readl(dc, DC_CMD_INT_MASK); value |= VBLANK_INT; tegra_dc_writel(dc, value, DC_CMD_INT_MASK); - spin_unlock_irqrestore(&dc->lock, flags); - return 0; } static void tegra_dc_disable_vblank(struct drm_crtc *crtc) { struct tegra_dc *dc = to_tegra_dc(crtc); - unsigned long value, flags; - - spin_lock_irqsave(&dc->lock, flags); + u32 value; value = tegra_dc_readl(dc, DC_CMD_INT_MASK); value &= ~VBLANK_INT; tegra_dc_writel(dc, value, DC_CMD_INT_MASK); - - spin_unlock_irqrestore(&dc->lock, flags); } static const struct drm_crtc_funcs tegra_crtc_funcs = { @@ -2033,7 +2025,6 @@ static int tegra_dc_probe(struct platform_device *pdev) dc->soc = of_device_get_match_data(&pdev->dev); - spin_lock_init(&dc->lock); INIT_LIST_HEAD(&dc->list); dc->dev = &pdev->dev; |