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@xxxxxxxxx>
---
drivers/video/auo_k1900fb.c | 6 ++++++
drivers/video/auo_k1901fb.c | 6 ++++++
2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/drivers/video/auo_k1900fb.c b/drivers/video/auo_k1900fb.c
index b02fab5d..8cf4847 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 ece99b8..98aa222 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,
--
1.7.2.3
--
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