diff options
Diffstat (limited to 'drivers/video/tegra/dc/dc.c')
| -rw-r--r-- | drivers/video/tegra/dc/dc.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/video/tegra/dc/dc.c b/drivers/video/tegra/dc/dc.c index e64b935e4c12..2ee5860f0f91 100644 --- a/drivers/video/tegra/dc/dc.c +++ b/drivers/video/tegra/dc/dc.c @@ -2090,6 +2090,18 @@ static void tegra_dc_underflow_handler(struct tegra_dc *dc) } #ifndef CONFIG_TEGRA_FPGA_PLATFORM +static bool tegra_dc_windows_are_dirty(struct tegra_dc *dc) +{ +#ifndef CONFIG_TEGRA_SIMULATION_PLATFORM + u32 val; + + val = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL); + if (val & (WIN_A_UPDATE | WIN_B_UPDATE | WIN_C_UPDATE)) + return true; +#endif + return false; +} + static void tegra_dc_trigger_windows(struct tegra_dc *dc) { u32 val, i; @@ -2157,6 +2169,15 @@ static void tegra_dc_continuous_irq(struct tegra_dc *dc, unsigned long status) if (status & V_BLANK_INT) { /* Schedule any additional bottom-half vblank actvities. */ schedule_work(&dc->vblank_work); + + /* All windows updated. Mask subsequent V_BLANK interrupts */ + if (!tegra_dc_windows_are_dirty(dc)) { + u32 val; + + val = tegra_dc_readl(dc, DC_CMD_INT_MASK); + val &= ~V_BLANK_INT; + tegra_dc_writel(dc, val, DC_CMD_INT_MASK); + } } if (status & FRAME_END_INT) { |