Diffstat (limited to 'drivers/soc/imx/gpc.c')
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/soc/imx/gpc.c b/drivers/soc/imx/gpc.c
index 7d14a4b4e82a..29b43651c261 100644
@@ -431,10 +431,19 @@ static int imx_gpc_probe(struct platform_device *pdev)
- /* Disable PU power down in normal operation if ERR009619 is present */
+ * Disable PU power down by runtime PM if ERR009619 is present.
+ * The PRE clock will be paused for several cycles when turning on the
+ * PU domain LDO from power down state. If PRE is in use at that time,
+ * the IPU/PRG cannot get the correct display data from the PRE.
+ * This is not a concern when the whole system enters suspend state, so
+ * it's safe to power down PU in this case.
/* Keep DISP always on if ERR006287 is present */