if the screen is blanked when suspending, the clock is already disabled,
leading to the following log :
WARNING: at arch/arm/plat-mxc/clock.c:59 __clk_disable+0x68/0x74()
Modules linked in:
[<c002d200>] (unwind_backtrace+0x0/0xf8) from [<c0046008>] (warn_slowpath_common+0x48/0x78)
[<c0046008>] (warn_slowpath_common+0x48/0x78) from [<c0031e28>] (__clk_disable+0x68/0x74)
[<c0031e28>] (__clk_disable+0x68/0x74) from [<c0031ddc>] (__clk_disable+0x1c/0x74)
[<c0031ddc>] (__clk_disable+0x1c/0x74) from [<c0031e58>] (clk_disable+0x24/0x34)
[<c0031e58>] (clk_disable+0x24/0x34) from [<c019808c>] (imxfb_disable_controller+0x38/0x48)
[<c019808c>] (imxfb_disable_controller+0x38/0x48) from [<c01980b0>] (imxfb_suspend+0x14/0x1c)
Signed-off-by: Eric Bénard <eric@xxxxxxxxxx>
Cc: kernel@xxxxxxxxxxxxxx
Cc: u.kleine-koenig@xxxxxxxxxxxxxx
Cc: linux-fbdev@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
---
drivers/video/imxfb.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
index b4b6dec..6cbfbff 100644
--- a/drivers/video/imxfb.c
+++ b/drivers/video/imxfb.c
@@ -597,8 +597,8 @@ static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
struct imxfb_info *fbi = info->par;
pr_debug("%s\n", __func__);
-
- imxfb_disable_controller(fbi);
+ if (readl(fbi->regs + LCDC_RMCR))
+ imxfb_disable_controller(fbi);
return 0;
}
--
1.6.3.3
--
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