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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: Sylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Sylvain Rochet 2015-02-22 18:51:04 +01:00 committed by Boris Brezillon
parent 5848698258
commit 16e6004eb7
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
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@ -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);