AUO-K190x: add runtime-pm calls to controller init functions

The controller init may be called from a context where the device
is runtime suspended, leading to a deadlock, as the controllers only
accepts the wakeup command when suspended.

Signed-off-by: Heiko Stübner <heiko@sntech.de>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

2 files changed, 12 insertions, 0 deletions

diff --git a/drivers/video/auo_k1900fb.c b/drivers/video/auo_k1900fb.c
index d572d3e9c502..f5b668e77af3 100644
--- a/drivers/video/auo_k1900fb.c
+++ b/drivers/video/auo_k1900fb.c
@@ -60,9 +60,12 @@
 
 static void auok1900_init(struct auok190xfb_par *par)
 {
+        struct device *dev = par->info->device;
         struct auok190x_board *board = par->board;
         u16 init_param = 0;
 
+        pm_runtime_get_sync(dev);
+
         init_param |= AUOK1900_INIT_TEMP_AVERAGE;
         init_param |= AUOK1900_INIT_ROTATE(par->rotation);
         init_param |= AUOK190X_INIT_INVERSE_WHITE;
@@ -74,6 +77,9 @@ static void auok1900_init(struct auok190xfb_par *par)
 
         /* let the controller finish */
         board->wait_for_rdy(par);
+
+        pm_runtime_mark_last_busy(dev);
+        pm_runtime_put_autosuspend(dev);
 }
 
 static void auok1900_update_region(struct auok190xfb_par *par, int mode,
diff --git a/drivers/video/auo_k1901fb.c b/drivers/video/auo_k1901fb.c
index 9efbe2763447..12b9adcb75c5 100644
--- a/drivers/video/auo_k1901fb.c
+++ b/drivers/video/auo_k1901fb.c
@@ -101,9 +101,12 @@
 
 static void auok1901_init(struct auok190xfb_par *par)
 {
+        struct device *dev = par->info->device;
         struct auok190x_board *board = par->board;
         u16 init_param = 0;
 
+        pm_runtime_get_sync(dev);
+
         init_param |= AUOK190X_INIT_INVERSE_WHITE;
         init_param |= AUOK190X_INIT_FORMAT0;
         init_param |= AUOK1901_INIT_RESOLUTION(par->resolution);
@@ -113,6 +116,9 @@ static void auok1901_init(struct auok190xfb_par *par)
 
         /* let the controller finish */
         board->wait_for_rdy(par);
+
+        pm_runtime_mark_last_busy(dev);
+        pm_runtime_put_autosuspend(dev);
 }
 
 static void auok1901_update_region(struct auok190xfb_par *par, int mode,