diff options
| -rw-r--r-- | drivers/gpu/drm/tegra/dsi.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index 49f0bc270e14..a9870c828374 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -912,6 +912,15 @@ static void tegra_dsi_encoder_enable(struct drm_encoder *encoder) u32 value; int err; + /* If the bootloader enabled DSI it needs to be disabled + * in order for the panel initialization commands to be + * properly sent. + */ + value = tegra_dsi_readl(dsi, DSI_POWER_CONTROL); + + if (value & DSI_POWER_CONTROL_ENABLE) + tegra_dsi_disable(dsi); + err = tegra_dsi_prepare(dsi); if (err < 0) { dev_err(dsi->dev, "failed to prepare: %d\n", err); |