linux-kernel - [PATCH] drm: hdlcd: Update PM code to save/restore console.

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Message-Id: <20170616135333.27796-1-Liviu.Dudau@arm.com>
Date:   Fri, 16 Jun 2017 14:53:33 +0100
From:   Liviu Dudau <Liviu.Dudau@....com>
To:     Mali DP Maintainers <malidp@...s.arm.com>
Cc:     Brian Starkey <brian.starkey@....com>,
        David Airlie <airlied@...ux.ie>,
        DRI devel <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] drm: hdlcd: Update PM code to save/restore console.

Update the PM code to suspend/resume the fbdev_cma console.

Signed-off-by: Liviu Dudau <Liviu.Dudau@....com>
---
 drivers/gpu/drm/arm/hdlcd_drv.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c
index d3da87fbd85a..89cd408cde6f 100644
--- a/drivers/gpu/drm/arm/hdlcd_drv.c
+++ b/drivers/gpu/drm/arm/hdlcd_drv.c
@@ -13,6 +13,7 @@
 #include <linux/spinlock.h>
 #include <linux/clk.h>
 #include <linux/component.h>
+#include <linux/console.h>
 #include <linux/list.h>
 #include <linux/of_graph.h>
 #include <linux/of_reserved_mem.h>
@@ -435,9 +436,15 @@ static int __maybe_unused hdlcd_pm_suspend(struct device *dev)
 		return 0;
 
 	drm_kms_helper_poll_disable(drm);
+	console_lock();
+	drm_fbdev_cma_set_suspend(hdlcd->fbdev, 1);
+	console_unlock();
 
 	hdlcd->state = drm_atomic_helper_suspend(drm);
 	if (IS_ERR(hdlcd->state)) {
+		console_lock();
+		drm_fbdev_cma_set_suspend(hdlcd->fbdev, 0);
+		console_unlock();
 		drm_kms_helper_poll_enable(drm);
 		return PTR_ERR(hdlcd->state);
 	}
@@ -454,8 +461,10 @@ static int __maybe_unused hdlcd_pm_resume(struct device *dev)
 		return 0;
 
 	drm_atomic_helper_resume(drm, hdlcd->state);
+	console_lock();
+	drm_fbdev_cma_set_suspend(hdlcd->fbdev, 0);
+	console_unlock();
 	drm_kms_helper_poll_enable(drm);
-	pm_runtime_set_active(dev);
 
 	return 0;
 }
-- 
2.13.1