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 <treding@nvidia.com>
diff --git a/drivers/gpu/host1x/mipi.c b/drivers/gpu/host1x/mipi.c
index a264b33..7253048 100644
--- a/drivers/gpu/host1x/mipi.c
+++ b/drivers/gpu/host1x/mipi.c
@@ -279,6 +279,10 @@
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);