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Subject[PATCH v2] drm: hdlcd: Update PM code to save/restore console.
Date
Update the PM code to suspend/resume the fbdev_cma console.

Changelog:
- v2: Use drm_fbdev_cma_set_suspend_unlocked() function for taking the
console lock (suggested by Noralf Trønnes <noralf@tronnes.org>)
- v1: Initial submission [1]


[1] https://lists.freedesktop.org/archives/dri-devel/2017-June/144502.html

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
---
drivers/gpu/drm/arm/hdlcd_drv.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c
index d3da87fbd85a..11ecda211f7f 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 +436,11 @@ static int __maybe_unused hdlcd_pm_suspend(struct device *dev)
return 0;

drm_kms_helper_poll_disable(drm);
+ drm_fbdev_cma_set_suspend_unlocked(hdlcd->fbdev, 1);

hdlcd->state = drm_atomic_helper_suspend(drm);
if (IS_ERR(hdlcd->state)) {
+ drm_fbdev_cma_set_suspend_unlocked(hdlcd->fbdev, 0);
drm_kms_helper_poll_enable(drm);
return PTR_ERR(hdlcd->state);
}
@@ -454,8 +457,8 @@ static int __maybe_unused hdlcd_pm_resume(struct device *dev)
return 0;

drm_atomic_helper_resume(drm, hdlcd->state);
+ drm_fbdev_cma_set_suspend_unlocked(hdlcd->fbdev, 0);
drm_kms_helper_poll_enable(drm);
- pm_runtime_set_active(dev);

return 0;
}
--
2.13.1
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