drm/msm/dsi-staging: add error handling support to DSI driver
Add functions to handle and recover from various DSI errors
in DRM DSI driver. The errors that are currently handled are
DSI FIFO OVERFLOW, FIFO UNDERFLOW, DSI BTA TIMEOUT and
DSI LP/RX TIMEOUT.
Change-Id: Ifc4eeaf01b3b5204b26745b6cc2dcffb71cb3f57
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>
diff --git a/drivers/gpu/drm/msm/dsi-staging/dsi_phy.c b/drivers/gpu/drm/msm/dsi-staging/dsi_phy.c
index b747d2a..4210f77 100644
--- a/drivers/gpu/drm/msm/dsi-staging/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi-staging/dsi_phy.c
@@ -843,6 +843,21 @@
return rc;
}
+int dsi_phy_lane_reset(struct msm_dsi_phy *phy)
+{
+ int ret = 0;
+
+ if (!phy)
+ return ret;
+
+ mutex_lock(&phy->phy_lock);
+ if (phy->hw.ops.phy_lane_reset)
+ ret = phy->hw.ops.phy_lane_reset(&phy->hw);
+ mutex_unlock(&phy->phy_lock);
+
+ return ret;
+}
+
/**
* dsi_phy_disable() - disable DSI PHY hardware.
* @phy: DSI PHY handle.