From 9306e996574f7f57136a62e49cd0075f85713623 Mon Sep 17 00:00:00 2001
From: Stefan Agner <stefan@agner.ch>
Date: Thu, 9 Nov 2017 15:39:56 +0100
Subject: [PATCH] drm/fsl-dcu: avoid disabling pixel clock twice on suspend
Git-commit: 9306e996574f7f57136a62e49cd0075f85713623
Patch-mainline: v4.15-rc1
References: bsc#1051510
With commit 0a70c998d0c5 ("drm/fsl-dcu: enable pixel clock when
enabling CRTC") the pixel clock is controlled by the CRTC code.
Disabling the pixel clock in suspend leads to a warning due to
the second clk_disable_unprepare call:
WARNING: CPU: 0 PID: 359 at drivers/clk/clk.c:594 clk_core_disable+0x8c/0x90
Remove clk_disable_unprepare call for pixel clock to avoid
unbalanced clock disable on suspend.
Fixes: 0a70c998d0c5 ("drm/fsl-dcu: enable pixel clock when enabling CRTC")
Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 1 -
1 file changed, 1 deletion(-)
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -210,7 +210,6 @@ static int fsl_dcu_drm_pm_suspend(struct
return PTR_ERR(fsl_dev->state);
}
- clk_disable_unprepare(fsl_dev->pix_clk);
clk_disable_unprepare(fsl_dev->clk);
return 0;