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Commit 16e6004e authored by Sylvain Rochet's avatar Sylvain Rochet Committed by Boris Brezillon
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drm: atmel-hlcdc: Add pinctrl PM select sleep,default state in CRTC suspend/resume 



Some LCD panels have back-powering issue when un-powered, allows users
to use an alternate pinctrl "sleep" in order to clamp outputs to a
wanted state at suspend.

Signed-off-by: default avatarSylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: default avatarBoris Brezillon <boris.brezillon@free-electrons.com>
parent 58486982

drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c

+3 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/clk.h>

#include <linux/pm.h>

#include <linux/pm_runtime.h>

#include <linux/pinctrl/consumer.h>



#include <drm/drm_crtc.h>

#include <drm/drm_crtc_helper.h>
@@ -157,6 +158,7 @@ static void atmel_hlcdc_crtc_disable(struct drm_crtc *c) 
		cpu_relax();



	clk_disable_unprepare(crtc->dc->hlcdc->sys_clk);

	pinctrl_pm_select_sleep_state(dev->dev);



	pm_runtime_allow(dev->dev);
@@ -179,6 +181,7 @@ static void atmel_hlcdc_crtc_enable(struct drm_crtc *c) 


	pm_runtime_forbid(dev->dev);



	pinctrl_pm_select_default_state(dev->dev);

	clk_prepare_enable(crtc->dc->hlcdc->sys_clk);



	regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_PIXEL_CLK);