[4.14,01/75] drm/fsl-dcu: avoid disabling pixel clock twice on suspend
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Message ID 20171207130818.801986526@linuxfoundation.org
State New, archived
Headers show
  • 4.14.5-stable review
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Commit Message

Greg Kroah-Hartman Dec. 7, 2017, 1:07 p.m. UTC
4.14-stable review patch.  If anyone has any objections, please let me know.


From: Stefan Agner <stefan@agner.ch>

commit 9306e996574f7f57136a62e49cd0075f85713623 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c |    1 -
 1 file changed, 1 deletion(-)

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--- 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);
 	return 0;