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Commit 4569619d authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/panel: sharp: lq101r1sx01: Add delay after display on 



After switching the display on (using the DCS display_on command), wait
for 6 frames (100ms at 60 Hz) to give the display more time to prepare.
Failing to do this results in the panel not initializing properly in a
large number of cases.

Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent d435a2af

drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c

+13 −0
Original line number Diff line number Diff line
@@ -41,6 +41,16 @@ static inline struct sharp_panel *to_sharp_panel(struct drm_panel *panel) 
	return container_of(panel, struct sharp_panel, base);

}



static void sharp_wait_frames(struct sharp_panel *sharp, unsigned int frames)

{

	unsigned int refresh = drm_mode_vrefresh(sharp->mode);



	if (WARN_ON(frames > refresh))

		return;



	msleep(1000 / (refresh / frames));

}



static int sharp_panel_write(struct sharp_panel *sharp, u16 offset, u8 value)

{

	u8 payload[3] = { offset >> 8, offset & 0xff, value };
@@ -238,6 +248,9 @@ static int sharp_panel_prepare(struct drm_panel *panel) 


	sharp->prepared = true;



	/* wait for 6 frames before continuing */

	sharp_wait_frames(sharp, 6);



	return 0;



poweroff: