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[PATCHv2,2/2] drm: atmel-hlcdc: Add pinctrl PM select sleep, default state in CRTC suspend/resume

Message ID 1423774163-4752-3-git-send-email-sylvain.rochet@finsecur.com (mailing list archive)
State New, archived
Headers show

Commit Message

Sylvain Rochet Feb. 12, 2015, 8:49 p.m. UTC 
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>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index 79c9a19..decd9ea 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -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>
@@ -156,6 +157,7 @@  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);
 
@@ -178,6 +180,7 @@  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);