From 2ed264bf916b689fe0c71ac726995f0876062667 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Wed, 8 Apr 2015 17:17:44 +0200 Subject: [PATCH] gpu: host1x: mipi: Clear calibration status Before starting a new calibration cycle, make sure to clear the current status by writing a 1 to the various "calibration done" bits. Signed-off-by: Thierry Reding --- drivers/gpu/host1x/mipi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/host1x/mipi.c b/drivers/gpu/host1x/mipi.c index a264b339ae09..7253048ce131 100644 --- a/drivers/gpu/host1x/mipi.c +++ b/drivers/gpu/host1x/mipi.c @@ -279,6 +279,10 @@ int tegra_mipi_calibrate(struct tegra_mipi_device *device) tegra_mipi_writel(device->mipi, value, MIPI_CAL_CTRL); + /* clear any pending status bits */ + value = tegra_mipi_readl(device->mipi, MIPI_CAL_STATUS); + tegra_mipi_writel(device->mipi, value, MIPI_CAL_STATUS); + value = tegra_mipi_readl(device->mipi, MIPI_CAL_CTRL); value |= MIPI_CAL_CTRL_START; tegra_mipi_writel(device->mipi, value, MIPI_CAL_CTRL);