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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: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2014-12-08 15:05:48 +01:00
parent d435a2af12
commit 4569619d0f
1 changed files with 13 additions and 0 deletions
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13
drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
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@ -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: