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;