Preserve the contents of MIPI_CAL_CTRL when starting mipi
calibration.
Signed-off-by: Sean Paul <[email protected]>
---
drivers/gpu/host1x/mipi.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/host1x/mipi.c b/drivers/gpu/host1x/mipi.c
index 4dd91fd..0af2892 100644
--- a/drivers/gpu/host1x/mipi.c
+++ b/drivers/gpu/host1x/mipi.c
@@ -215,7 +215,9 @@ int tegra_mipi_calibrate(struct tegra_mipi_device *device)
tegra_mipi_writel(device->mipi, value, modules[i].reg);
}
- tegra_mipi_writel(device->mipi, MIPI_CAL_CTRL_START, MIPI_CAL_CTRL);
+ value = tegra_mipi_readl(device->mipi, MIPI_CAL_CTRL);
+ value |= MIPI_CAL_CTRL_START;
+ tegra_mipi_writel(device->mipi, value, MIPI_CAL_CTRL);
err = tegra_mipi_wait(device->mipi);
--
2.0.0
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